{"id":153,"date":"2026-03-24T13:44:00","date_gmt":"2026-03-24T05:44:00","guid":{"rendered":"https:\/\/codergodv.xyz\/?p=153"},"modified":"2026-03-24T13:44:01","modified_gmt":"2026-03-24T05:44:01","slug":"linux%e8%bf%9b%e7%a8%8b%e4%bf%a1%e5%8f%b7","status":"publish","type":"post","link":"https:\/\/codergodv.xyz\/index.php\/2026\/03\/24\/linux%e8%bf%9b%e7%a8%8b%e4%bf%a1%e5%8f%b7\/","title":{"rendered":"Linux\u8fdb\u7a0b\u4fe1\u53f7"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u4fe1\u53f7\u5165\u95e8<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u751f\u6d3b\u89d2\u5ea6\u7684\u4fe1\u53f7<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f60\u5728\u7f51\u4e0a\u4e70\u4e86\u5f88\u591a\u4ef6\u5546\u54c1\uff0c\u5728\u7b49\u5f85\u4e0d\u540c\u5546\u54c1\u5feb\u9012\u7684\u5230\u6765\u3002\u4f46\u5373\u4fbf\u5feb\u9012\u8fd8\u6ca1\u6709\u5230\u6765\uff0c\u4f60\u4e5f\u77e5\u9053\u5feb\u9012\u5230\u4e86\u7684\u65f6\u5019\u5e94\u8be5\u600e\u4e48\u5904\u7406\u5feb\u9012\uff0c\u4e5f\u5c31\u662f\u4f60\u80fd\u201c\u8bc6\u522b\u5feb\u9012\u201d\u3002<\/li>\n\n\n\n<li>\u5f53\u5feb\u9012\u5230\u8fbe\u76ee\u7684\u5730\u4e86\uff0c\u4f60\u6536\u5230\u4e86\u5feb\u9012\u5230\u6765\u7684\u901a\u77e5\uff0c\u4f46\u662f\u4f60\u4e0d\u4e00\u5b9a\u8981\u9a6c\u4e0a\u4e0b\u697c\u53d6\u5feb\u9012\uff0c\u4e5f\u5c31\u662f\u8bf4\u53d6\u5feb\u9012\u7684\u884c\u4e3a\u5e76\u4e0d\u662f\u4e00\u5b9a\u8981\u7acb\u5373\u6267\u884c\uff0c\u53ef\u4ee5\u7406\u89e3\u6210\u5728\u201c\u5728\u5408\u9002\u7684\u65f6\u5019\u53bb\u53d6\u201d\u3002<\/li>\n\n\n\n<li>\u5728\u4f60\u6536\u5230\u5feb\u9012\u5230\u8fbe\u7684\u901a\u77e5\uff0c\u518d\u5230\u4f60\u62ff\u5230\u5feb\u9012\u671f\u95f4\uff0c\u662f\u6709\u4e00\u4e2a\u65f6\u95f4\u7a97\u53e3\u7684\uff0c\u5728\u8fd9\u6bb5\u65f6\u95f4\u5185\u4f60\u5e76\u6ca1\u6709\u62ff\u5230\u5feb\u9012\uff0c\u4f46\u662f\u4f60\u77e5\u9053\u5feb\u9012\u5df2\u7ecf\u5230\u4e86\uff0c\u672c\u8d28\u4e0a\u662f\u4f60\u201c\u8bb0\u4f4f\u4e86\u6709\u4e00\u4e2a\u5feb\u9012\u8981\u53bb\u53d6\u201d\u3002<\/li>\n\n\n\n<li>\u5f53\u4f60\u65f6\u95f4\u5408\u9002\uff0c\u987a\u5229\u62ff\u5230\u5feb\u9012\u4e4b\u540e\uff0c\u5c31\u8981\u5f00\u59cb\u5904\u7406\u5feb\u9012\u4e86\uff0c\u800c\u5904\u7406\u5feb\u9012\u7684\u65b9\u5f0f\u6709\u4e09\u79cd\uff1a1\u3001\u6267\u884c\u9ed8\u8ba4\u52a8\u4f5c\uff08\u6253\u5f00\u5feb\u9012\uff0c\u4f7f\u7528\u5546\u54c1\uff092\u3001\u6267\u884c\u81ea\u5b9a\u4e49\u52a8\u4f5c\uff08\u5feb\u9012\u662f\u5e2e\u522b\u4eba\u4e70\u7684\uff0c\u4f60\u8981\u5c06\u5feb\u9012\u4ea4\u7ed9\u4ed6\uff093\u3001\u5ffd\u7565\uff08\u62ff\u5230\u5feb\u9012\u540e\uff0c\u653e\u5728\u4e00\u8fb9\u7ee7\u7eed\u505a\u81ea\u5df1\u7684\u4e8b\uff09\u3002<\/li>\n\n\n\n<li>\u5feb\u9012\u5230\u6765\u7684\u6574\u4e2a\u8fc7\u7a0b\uff0c\u5bf9\u4f60\u6765\u8bb2\u662f\u5f02\u6b65\u7684\uff0c\u4f60\u4e0d\u80fd\u786e\u5b9a\u4f60\u7684\u5feb\u9012\u4ec0\u4e48\u65f6\u5019\u5230\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u6280\u672f\u5e94\u7528\u89d2\u5ea6\u7684\u4fe1\u53f7<\/h3>\n\n\n\n<p>\u7f16\u5199\u4ee5\u4e0b\u7a0b\u5e8f\u5e76\u8fd0\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;unistd.h&gt;\n\nint main()\n{\n    while (1){\n        printf(\"hello signal!\\n\");\n        sleep(1);\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u6211\u4eec\u77e5\u9053\u8be5\u7a0b\u5e8f\u7684\u8fd0\u884c\u7ed3\u679c\u5c31\u662f\u6b7b\u5faa\u73af\u5730\u8fdb\u884c\u6253\u5370\uff0c\u800c\u5bf9\u4e8e\u6b7b\u5faa\u73af\u6765\u8bf4\uff0c\u6700\u597d\u7684\u65b9\u5f0f\u5c31\u662f\u4f7f\u7528Ctrl+C\u5bf9\u5176\u8fdb\u884c\u7ec8\u6b62\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/div><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u4e3a\u4ec0\u4e48\u4f7f\u7528Ctrl + C\u540e\uff0c\u8be5\u8fdb\u7a0b\u5c31\u7ec8\u6b62\u4e86\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u5b9e\u9645\u4e0a\u5f53\u7528\u6237\u6309Ctrl + C\u65f6\uff0c\u8fd9\u4e2a\u952e\u76d8\u8f93\u5165\u4f1a\u4ea7\u751f\u4e00\u4e2a\u786c\u4e2d\u65ad\uff0c\u88ab\u64cd\u4f5c\u7cfb\u7edf\u83b7\u53d6\u5e76\u89e3\u91ca\u6210\u4fe1\u53f7\uff08Ctrl + C\u88ab\u89e3\u91ca\u62102\u53f7\u4fe1\u53f7\uff09\uff0c\u7136\u540e\u64cd\u4f5c\u7cfb\u7edf\u5c062\u53f7\u4fe1\u53f7\u53d1\u9001\u7ed9\u76ee\u6807\u524d\u53f0\u8fdb\u7a0b\uff0c\u5f53\u524d\u53f0\u8fdb\u7a0b\u6536\u52302\u53f7\u4fe1\u53f7\u540e\u5c31\u4f1a\u9000\u51fa\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528signal\u51fd\u6570\u5bf92\u53f7\u4fe1\u53f7\u8fdb\u884c\u6355\u6349\uff0c\u8bc1\u660e\u5f53\u6211\u4eec\u6309Ctrl + C\u65f6\u8fdb\u7a0b\u786e\u5b9e\u662f\u6536\u5230\u4e862\u53f7\u4fe1\u53f7\u3002\u4f7f\u7528signal\u51fd\u6570\u65f6\uff0c\u6211\u4eec\u9700\u8981\u4f20\u5165\u4e24\u4e2a\u53c2\u6570\uff0c\u7b2c\u4e00\u4e2a\u662f\u9700\u8981\u6355\u6349\u7684\u4fe1\u53f7\u7f16\u53f7\uff0c\u7b2c\u4e8c\u4e2a\u662f\u5bf9\u6355\u6349\u4fe1\u53f7\u7684\u5904\u7406\u65b9\u6cd5\uff0c\u8be5\u5904\u7406\u65b9\u6cd5\uff08\u51fd\u6570\uff09\u7684\u53c2\u6570\u662fint\uff0c\u8fd4\u56de\u503c\u662fvoid\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e0b\u9762\u7684\u4ee3\u7801\u4e2d\u5c062\u53f7\u4fe1\u53f7\u8fdb\u884c\u4e86\u6355\u6349\uff0c\u5f53\u8be5\u8fdb\u7a0b\u8fd0\u884c\u8d77\u6765\u540e\uff0c\u82e5\u8be5\u8fdb\u7a0b\u6536\u5230\u4e862\u53f7\u4fe1\u53f7\u5c31\u4f1a\u6253\u5370\u51fa\u6536\u5230\u4fe1\u53f7\u7684\u4fe1\u53f7\u7f16\u53f7\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;signal.h&gt;\n#include &lt;unistd.h&gt;\n\nvoid handler(int sig)\n{\n    printf(\"get a signal:%d\\n\", sig);\n}\n\nint main()\n{\n    signal(2, handler); \/\/\u6ce8\u518c2\u53f7\u4fe1\u53f7\n    while (1){\n        printf(\"hello signal!\\n\");\n        sleep(1);\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u6b64\u65f6\u5f53\u8be5\u8fdb\u7a0b\u6536\u52302\u53f7\u4fe1\u53f7\u540e\uff0c\u5c31\u4f1a\u6267\u884c\u6211\u4eec\u7ed9\u51fa\u7684handler\u65b9\u6cd5\uff0c\u800c\u4e0d\u4f1a\u50cf\u4e4b\u524d\u4e00\u6837\u76f4\u63a5\u9000\u51fa\u4e86\uff0c\u56e0\u4e3a\u6b64\u65f6\u6211\u4eec\u5df2\u7ecf\u5c062\u53f7\u4fe1\u53f7\u7684\u5904\u7406\u65b9\u5f0f\u7531\u9ed8\u8ba4\u6539\u4e3a\u4e86\u81ea\u5b9a\u4e49\u4e86\u3002<img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-17143679851194.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n\n\n\n<p>\u7531\u6b64\u4e5f\u8bc1\u660e\u4e86\uff0c\u5f53\u6211\u4eec\u6309Ctrl + C\u65f6\u8fdb\u7a0b\u786e\u5b9e\u662f\u6536\u5230\u4e862\u53f7\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Ctrl + C\u4ea7\u751f\u7684\u4fe1\u53f7\u53ea\u80fd\u53d1\u9001\u7ed9\u524d\u53f0\u8fdb\u7a0b\u3002\u5728\u4e00\u4e2a\u547d\u4ee4\u540e\u52a0\u4e2a&amp;\u5c31\u53ef\u4ee5\u5c06\u5176\u653e\u5230\u540e\u53f0\u8fd0\u884c\uff0c\u8fd9\u6837Shell\u5c31\u4e0d\u5fc5\u7b49\u5f85\u8fdb\u7a0b\u7ed3\u675f\u5c31\u53ef\u4ee5\u63a5\u6536\u65b0\u7684\u547d\u4ee4\uff0c\u542f\u52a8\u65b0\u7684\u8fdb\u7a0b\u3002<\/li>\n\n\n\n<li>Shell\u53ef\u4ee5\u540c\u65f6\u8fd0\u884c\u4e00\u4e2a\u524d\u53f0\u8fdb\u7a0b\u548c\u4efb\u610f\u591a\u4e2a\u540e\u53f0\u8fdb\u7a0b\uff0c\u4f46\u662f\u53ea\u6709\u524d\u53f0\u8fdb\u7a0b\u624d\u80fd\u63a5\u5230\u50cfCtrl+C\u8fd9\u79cd\u63a7\u5236\u952e\u4ea7\u751f\u7684\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>\u524d\u53f0\u8fdb\u7a0b\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u7528\u6237\u968f\u65f6\u53ef\u80fd\u6309\u4e0bCtrl+C\u800c\u4ea7\u751f\u4e00\u4e2a\u4fe1\u53f7\uff0c\u4e5f\u5c31\u662f\u8bf4\u8be5\u8fdb\u7a0b\u7684\u7528\u6237\u7a7a\u95f4\u4ee3\u7801\u6267\u884c\u5230\u4efb\u4f55\u5730\u65b9\u90fd\u53ef\u80fd\u6536\u5230SIGINT\u4fe1\u53f7\u800c\u7ec8\u6b62\uff0c\u6240\u4ee5\u4fe1\u53f7\u76f8\u5bf9\u4e8e\u8fdb\u7a0b\u7684\u63a7\u5236\u6d41\u7a0b\u6765\u8bf4\u662f\u5f02\u6b65\u7684\u3002<\/li>\n\n\n\n<li>\u4fe1\u53f7\u662f\u8fdb\u7a0b\u4e4b\u95f4\u4e8b\u4ef6\u5f02\u6b65\u901a\u77e5\u7684\u4e00\u79cd\u65b9\u5f0f\uff0c\u5c5e\u4e8e\u8f6f\u4e2d\u65ad\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u4fe1\u53f7\u7684\u53d1\u9001\u4e0e\u8bb0\u5f55<\/h3>\n\n\n\n<p>\u6211\u4eec\u4f7f\u7528<code>kill -l<\/code>\u547d\u4ee4\u53ef\u4ee5\u67e5\u770bLinux\u5f53\u4e2d\u7684\u4fe1\u53f7\u5217\u8868\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16788457341383.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16788457341383.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u5176\u4e2d1~31\u53f7\u4fe1\u53f7\u662f\u666e\u901a\u4fe1\u53f7\uff0c34~64\u53f7\u4fe1\u53f7\u662f\u5b9e\u65f6\u4fe1\u53f7\uff0c\u666e\u901a\u4fe1\u53f7\u548c\u5b9e\u65f6\u4fe1\u53f7\u5404\u81ea\u90fd\u670931\u4e2a\uff0c\u6bcf\u4e2a\u4fe1\u53f7\u90fd\u6709\u4e00\u4e2a\u7f16\u53f7\u548c\u4e00\u4e2a\u5b8f\u5b9a\u4e49\u540d\u79f0\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16788458548269.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16788458548269.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u4fe1\u53f7\u662f\u5982\u4f55\u8bb0\u5f55\u7684\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u5b9e\u9645\u4e0a\uff0c\u5f53\u4e00\u4e2a\u8fdb\u7a0b\u63a5\u6536\u5230\u67d0\u79cd\u4fe1\u53f7\u540e\uff0c\u8be5\u4fe1\u53f7\u662f\u88ab\u8bb0\u5f55\u5728\u8be5\u8fdb\u7a0b\u7684\u8fdb\u7a0b\u63a7\u5236\u5757\u5f53\u4e2d\u7684\u3002\u6211\u4eec\u90fd\u77e5\u9053\u8fdb\u7a0b\u63a7\u5236\u5757\u672c\u8d28\u4e0a\u5c31\u662f\u4e00\u4e2a\u7ed3\u6784\u4f53\u53d8\u91cf\uff0c\u800c\u5bf9\u4e8e\u4fe1\u53f7\u6765\u8bf4\u6211\u4eec\u4e3b\u8981\u5c31\u662f\u8bb0\u5f55\u67d0\u79cd\u4fe1\u53f7\u662f\u5426\u4ea7\u751f\uff0c\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u4e00\u4e2a32\u4f4d\u7684\u4f4d\u56fe\u6765\u8bb0\u5f55\u4fe1\u53f7\u662f\u5426\u4ea7\u751f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167885943006019.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167885943006019.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u5176\u4e2d\u6bd4\u7279\u4f4d\u7684\u4f4d\u7f6e\u5c31\u4ee3\u8868\u4fe1\u53f7\u7684\u7f16\u53f7\uff0c\u800c\u6bd4\u7279\u4f4d\u7684\u5185\u5bb9\u5c31\u4ee3\u8868\u662f\u5426\u6536\u5230\u5bf9\u5e94\u7684\u4fe1\u53f7\uff0c\u6bd4\u5982\u7b2c6\u4e2a\u6bd4\u7279\u4f4d\u662f1\u5c31\u8868\u660e\u6536\u5230\u4e866\u53f7\u4fe1\u53f7\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u4fe1\u53f7\u662f\u5982\u4f55\u4ea7\u751f\u7684\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u4e00\u4e2a\u8fdb\u7a0b\u6536\u5230\u4fe1\u53f7\uff0c\u672c\u8d28\u5c31\u662f\u8be5\u8fdb\u7a0b\u5185\u7684\u4fe1\u53f7\u4f4d\u56fe\u88ab\u4fee\u6539\u4e86\uff0c\u4e5f\u5c31\u662f\u8be5\u8fdb\u7a0b\u7684\u6570\u636e\u88ab\u4fee\u6539\u4e86\uff0c\u800c\u53ea\u6709\u64cd\u4f5c\u7cfb\u7edf\u624d\u6709\u8d44\u683c\u4fee\u6539\u8fdb\u7a0b\u7684\u6570\u636e\uff0c\u56e0\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u662f\u8fdb\u7a0b\u7684\u7ba1\u7406\u8005\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4fe1\u53f7\u7684\u4ea7\u751f\u672c\u8d28\u4e0a\u5c31\u662f\u64cd\u4f5c\u7cfb\u7edf\u76f4\u63a5\u53bb\u4fee\u6539\u76ee\u6807\u8fdb\u7a0b\u7684task_struct\u4e2d\u7684\u4fe1\u53f7\u4f4d\u56fe\u3002<\/p>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong> \u4fe1\u53f7\u53ea\u80fd\u7531\u64cd\u4f5c\u7cfb\u7edf\u53d1\u9001\uff0c\u4f46\u4fe1\u53f7\u7684\u53d1\u9001\u65b9\u5f0f\u6709\u591a\u79cd\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4fe1\u53f7\u5904\u7406\u5e38\u89c1\u65b9\u5f0f\u6982\u8ff0<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6267\u884c\u8be5\u4fe1\u53f7\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\u3002<\/li>\n\n\n\n<li>\u63d0\u4f9b\u4e00\u4e2a\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0c\u8981\u6c42\u5185\u6838\u5728\u5904\u7406\u8be5\u4fe1\u53f7\u65f6\u5207\u6362\u5230\u7528\u6237\u6001\u6267\u884c\u8fd9\u4e2a\u5904\u7406\u51fd\u6570\uff0c\u8fd9\u79cd\u65b9\u5f0f\u79f0\u4e3a\u6355\u6349\uff08Catch\uff09\u4e00\u4e2a\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>\u5ffd\u7565\u8be5\u4fe1\u53f7\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u5728Linux\u5f53\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7man\u624b\u518c\u67e5\u770b\u5404\u4e2a\u4fe1\u53f7\u9ed8\u8ba4\u7684\u5904\u7406\u52a8\u4f5c\u3002<\/p>\n\n\n\n<p><code>man 7 signal<\/code><\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886001630622.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886001630622.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u4ea7\u751f\u4fe1\u53f7<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u901a\u8fc7\u7ec8\u7aef\u6309\u952e\u4ea7\u751f\u4fe1\u53f7<\/h3>\n\n\n\n<p>\u5f53\u9762\u5bf9\u4e0b\u9762\u7684\u6b7b\u5faa\u73af\u7a0b\u5e8f\u65f6\uff0c\u6211\u4eec\u90fd\u77e5\u9053\u53ef\u4ee5\u6309Ctrl+C\u53ef\u4ee5\u7ec8\u6b62\u8be5\u8fdb\u7a0b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;unistd.h&gt;\n\nint main()\n{\n    while (1){\n        printf(\"hello signal!\\n\");\n        sleep(1);\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u4f46\u5b9e\u9645\u4e0a\u9664\u4e86\u6309Ctrl+C\u4e4b\u5916\uff0c\u6309Ctrl+\\\u4e5f\u53ef\u4ee5\u7ec8\u6b62\u8be5\u8fdb\u7a0b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886029736825.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886029736825.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u6309Ctrl+C\u7ec8\u6b62\u8fdb\u7a0b\u548c\u6309Ctrl+\\\u7ec8\u6b62\u8fdb\u7a0b\uff0c\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u6309Ctrl+C\u5b9e\u9645\u4e0a\u662f\u5411\u8fdb\u7a0b\u53d1\u90012\u53f7\u4fe1\u53f7SIGINT\uff0c\u800c\u6309Ctrl+\\\u5b9e\u9645\u4e0a\u662f\u5411\u8fdb\u7a0b\u53d1\u90013\u53f7\u4fe1\u53f7SIGQUIT\u3002\u67e5\u770b\u8fd9\u4e24\u4e2a\u4fe1\u53f7\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\uff0c\u53ef\u4ee5\u770b\u5230\u8fd9\u4e24\u4e2a\u4fe1\u53f7\u7684Action\u662f\u4e0d\u4e00\u6837\u7684\uff0c2\u53f7\u4fe1\u53f7\u662fTerm\uff0c\u800c3\u597d\u4fe1\u53f7\u662fCore\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886076712928.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886076712928.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>Term\u548cCore\u90fd\u4ee3\u8868\u7740\u7ec8\u6b62\u8fdb\u7a0b\uff0c\u4f46\u662fCore\u5728\u7ec8\u6b62\u65f6\u4f1a\u8fdb\u884c\u4e00\u4e2a\u52a8\u4f5c\uff0c\u90a3\u5c31\u662f\u6838\u5fc3\u8f6c\u50a8\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u4ec0\u4e48\u662f\u6838\u5fc3\u8f6c\u50a8\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u5728\u4e91\u670d\u52a1\u5668\u4e2d\uff0c\u6838\u5fc3\u8f6c\u50a8\u662f\u88ab\u9ed8\u8ba4\u5173\u6389\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528<code>ulimit -a<\/code>\u547d\u4ee4\u6765\u67e5\u770b\u5f53\u524d\u8d44\u6e90\u9650\u5236\u7684\u8bbe\u5b9a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886101524731.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886101524731.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u5176\u4e2d\u7b2c\u4e00\u884c\u663e\u793acore\u6587\u4ef6\u7684\u5927\u5c0f\u4e3a0\uff0c\u5373\u8868\u793a\u6838\u5fc3\u8f6c\u50a8\u662f\u88ab\u5173\u95ed\u7684\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7<code>ulimit -c size<\/code>\u547d\u4ee4\u6765\u8bbe\u7f6ecore\u6587\u4ef6\u7684\u5927\u5c0f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886123213942.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886123213942.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>core\u6587\u4ef6\u7684\u5927\u5c0f\u8bbe\u7f6e\u5b8c\u6bd5\u540e\uff0c\u5c31\u76f8\u5f53\u4e8e\u5c06\u6838\u5fc3\u8f6c\u50a8\u529f\u80fd\u6253\u5f00\u4e86\u3002\u6b64\u65f6\u5982\u679c\u6211\u4eec\u518d\u4f7f\u7528Ctrl+\\\u5bf9\u8fdb\u7a0b\u8fdb\u884c\u7ec8\u6b62\uff0c\u5c31\u4f1a\u53d1\u73b0\u7ec8\u6b62\u8fdb\u7a0b\u540e\u4f1a\u663e\u793a<code>core dumped<\/code>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886138288948.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886138288948.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u5e76\u4e14\u4f1a\u5728\u5f53\u524d\u8def\u5f84\u4e0b\u751f\u6210\u4e00\u4e2acore\u6587\u4ef6\uff0c\u8be5\u6587\u4ef6\u4ee5\u4e00\u4e32\u6570\u5b57\u4e3a\u540e\u7f00\uff0c\u800c\u8fd9\u4e00\u4e32\u6570\u5b57\u5b9e\u9645\u4e0a\u5c31\u662f\u53d1\u751f\u8fd9\u4e00\u6b21\u6838\u5fc3\u8f6c\u50a8\u7684\u8fdb\u7a0b\u7684PID\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886152162351.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886152162351.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p><strong>\u8bf4\u660e\u4e00\u4e0b\uff1a<\/strong> ulimit\u547d\u4ee4\u6539\u53d8\u7684\u662fShell\u8fdb\u7a0b\u7684Resource Limit\uff0c\u4f46myproc\u8fdb\u7a0b\u7684PCB\u662f\u7531Shell\u8fdb\u7a0b\u590d\u5236\u800c\u6765\u7684\uff0c\u6240\u4ee5\u4e5f\u5177\u6709\u548cshell\u8fdb\u7a0b\u76f8\u540c\u7684Resource Limit\u503c\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u6838\u5fc3\u8f6c\u50a8\u529f\u80fd\u6709\u4ec0\u4e48\u7528\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u5f53\u6211\u4eec\u7684\u4ee3\u7801\u51fa\u9519\u4e86\uff0c\u6211\u4eec\u6700\u5173\u5fc3\u7684\u662f\u6211\u4eec\u7684\u4ee3\u7801\u662f\u56e0\u4e3a\u4ec0\u4e48\u539f\u56e0\u51fa\u9519\u7684\u3002\u5982\u679c\u6211\u4eec\u7684\u4ee3\u7801\u8fd0\u884c\u7ed3\u675f\u4e86\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u9000\u51fa\u7801\u6765\u5224\u65ad\u4ee3\u7801\u51fa\u9519\u7684\u539f\u56e0\uff0c\u800c\u4e00\u4e2a\u4ee3\u7801\u662f\u5728\u8fd0\u884c\u5f53\u4e2d\u51fa\u9519\u7684\uff0c\u90a3\u4e48\u6211\u4eec\u4e5f\u8981\u6709\u529e\u6cd5\u5224\u65ad\u4ee3\u7801\u662f\u56e0\u4e3a\u4ec0\u4e48\u539f\u56e0\u51fa\u9519\u7684<\/p>\n\n\n\n<p>\u5f53\u6211\u4eec\u7684\u7a0b\u5e8f\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u5d29\u6e83\u4e86\uff0c\u6211\u4eec\u4e00\u822c\u4f1a\u901a\u8fc7\u8c03\u8bd5\u6765\u8fdb\u884c\u9010\u6b65\u67e5\u627e\u7a0b\u5e8f\u5d29\u6e83\u7684\u539f\u56e0\u3002\u800c\u5728\u67d0\u4e9b\u7279\u6b8a\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u4f1a\u7528\u5230\u6838\u5fc3\u8f6c\u50a8\uff0c<br>\u6838\u5fc3\u8f6c\u50a8\u6307\u7684\u662f\u64cd\u4f5c\u7cfb\u7edf\u5728\u8fdb\u7a0b\u6536\u5230\u67d0\u4e9b\u4fe1\u53f7\u800c\u7ec8\u6b62\u8fd0\u884c\u65f6\uff0c\u5c06\u8be5\u8fdb\u7a0b\u7684\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\u7684\u5185\u5bb9\u4ee5\u53ca\u6709\u5173\u8fdb\u7a0b\u72b6\u6001\u7684\u5176\u4ed6\u4fe1\u606f\u8f6c\u800c\u5b58\u50a8\u5230\u4e00\u4e2a\u78c1\u76d8\u6587\u4ef6\u5f53\u4e2d\uff0c\u8fd9\u4e2a\u78c1\u76d8\u6587\u4ef6\u4e5f\u53eb\u505a\u6838\u5fc3\u8f6c\u50a8\u6587\u4ef6\uff0c\u4e00\u822c\u547d\u540d\u4e3a<code>core.pid<\/code>\u3002<\/p>\n\n\n\n<p>\u800c\u6838\u5fc3\u8f6c\u50a8\u7684\u76ee\u7684\u5c31\u662f\u4e3a\u4e86\u5728\u8c03\u8bd5\u65f6\uff0c\u65b9\u4fbf\u95ee\u9898\u7684\u5b9a\u4f4d\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5982\u4f55\u8fd0\u7528\u6838\u5fc3\u8f6c\u50a8\u8fdb\u884c\u8c03\u8bd5\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u6211\u4eec\u7528\u4e0b\u9762\u8fd9\u6bb5\u4ee3\u7801\u8fdb\u884c\u6f14\u793a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886260244560.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886260244560.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u5f88\u660e\u663e\uff0c\u8be5\u4ee3\u7801\u5f53\u4e2d\u51fa\u73b0\u4e86\u96640\u9519\u8bef\uff0c\u8be5\u7a0b\u5e8f\u8fd0\u884c3\u79d2\u540e\u4f1a\u5d29\u6e83\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886267369563.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886267369563.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u6b64\u65f6\u6211\u4eec\u4fbf\u53ef\u4ee5\u5728\u5f53\u524d\u76ee\u5f55\u4e0b\u770b\u5230\u6838\u5fc3\u8f6c\u50a8\u65f6\u751f\u6210\u7684core\u6587\u4ef6\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886274274366.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886274274366.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u4f7f\u7528gdb\u5bf9\u5f53\u524d\u53ef\u6267\u884c\u7a0b\u5e8f\u8fdb\u884c\u8c03\u8bd5\uff0c\u7136\u540e\u76f4\u63a5\u4f7f\u7528<code>core-file core\u6587\u4ef6<\/code>\u547d\u4ee4\u52a0\u8f7dcore\u6587\u4ef6\uff0c\u5373\u53ef\u5224\u65ad\u51fa\u8be5\u7a0b\u5e8f\u5728\u7ec8\u6b62\u65f6\u6536\u5230\u4e868\u53f7\u4fe1\u53f7\uff0c\u5e76\u4e14\u5b9a\u4f4d\u5230\u4e86\u4ea7\u751f\u8be5\u9519\u8bef\u7684\u5177\u4f53\u4ee3\u7801\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886294554375.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886294554375.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p><strong>\u8bf4\u660e\u4e00\u4e0b\uff1a<\/strong> \u4e8b\u540e\u7528\u8c03\u8bd5\u5668\u68c0\u67e5core\u6587\u4ef6\u4ee5\u67e5\u6e05\u9519\u8bef\u539f\u56e0\uff0c\u8fd9\u79cd\u8c03\u8bd5\u65b9\u5f0f\u53eb\u505a\u4e8b\u540e\u8c03\u8bd5\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>core dump\u6807\u5fd7<\/p>\n<\/blockquote>\n\n\n\n<p>\u8fd8\u8bb0\u5f97\u8fdb\u7a0b\u7b49\u5f85\u51fd\u6570waitpid\u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u5417\uff1f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pid_t waitpid(pid_t pid, int* status, int options);<\/code><\/pre>\n\n\n\n<p>waitpid\u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570status\u662f\u4e00\u4e2a\u8f93\u51fa\u578b\u53c2\u6570\uff0c\u7528\u4e8e\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\u3002status\u662f\u4e00\u4e2a\u6574\u578b\u53d8\u91cf\uff0c\u4f46status\u4e0d\u80fd\u7b80\u5355\u7684\u5f53\u4f5c\u6574\u578b\u53d8\u91cf\uff0cstatus\u7684\u4e0d\u540c\u6bd4\u7279\u4f4d\u6240\u4ee3\u8868\u7684\u4fe1\u606f\u4e0d\u540c\uff0c\u5177\u4f53\u7ec6\u8282\u5982\u4e0b\uff08\u53ea\u5173\u6ce8status\u4f4e16\u4f4d\u6bd4\u7279\u4f4d\uff09\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/57b5067b9b91426fac46b308dba958d9.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/57b5067b9b91426fac46b308dba958d9.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u82e5\u8fdb\u7a0b\u662f\u6b63\u5e38\u7ec8\u6b62\u7684\uff0c\u90a3\u4e48status\u7684\u6b21\u4f4e\u516b\u4f4d\u5c31\u8868\u793a\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\uff0c\u5373\u9000\u51fa\u7801\u3002\u82e5\u8fdb\u7a0b\u662f\u88ab\u4fe1\u53f7\u6240\u6740\uff0c\u90a3\u4e48status\u7684\u4f4e7\u4f4d\u8868\u793a\u7ec8\u6b62\u4fe1\u53f7\uff0c\u800c\u7b2c8\u4f4d\u6bd4\u7279\u4f4d\u662fcore dump\u7684\u6807\u5fd7\uff0c\u5373\u8fdb\u7a0b\u7ec8\u6b62\u65f6\u662f\u5426\u8fdb\u884c\u4e86\u6838\u5fc3\u8f6c\u50a8\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886409143980.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886409143980.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u6253\u5f00Linux\u7684\u6838\u5fc3\u8f6c\u50a8\u529f\u80fd\uff0c\u5e76\u7f16\u5199\u4e0b\u5217\u4ee3\u7801\u3002\u4ee3\u7801\u4e2d\u7236\u8fdb\u7a0b\u4f7f\u7528fork\u51fd\u6570\u521b\u5efa\u4e86\u4e00\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u5b50\u8fdb\u7a0b\u6240\u6267\u884c\u7684\u4ee3\u7801\u5f53\u4e2d\u5b58\u5728\u91ce\u6307\u9488\u95ee\u9898\uff0c\u5f53\u5b50\u8fdb\u7a0b\u6267\u884c\u5230<code>*p = 100<\/code>\u65f6\uff0c\u5fc5\u7136\u4f1a\u88ab\u64cd\u4f5c\u7cfb\u7edf\u6240\u7ec8\u6b62\u5e76\u5728\u7ec8\u6b62\u65f6\u8fdb\u884c\u6838\u5fc3\u8f6c\u50a8\u3002\u6b64\u65f6\u7236\u8fdb\u7a0b\u4f7f\u7528waitpid\u51fd\u6570\u4fbf\u53ef\u83b7\u53d6\u5230\u5b50\u8fdb\u7a0b\u9000\u51fa\u65f6\u7684\u72b6\u6001\uff0c\u6839\u636estatus\u7684\u7b2c7\u4e2a\u6bd4\u7279\u4f4d\u4fbf\u53ef\u5f97\u77e5\u5b50\u8fdb\u7a0b\u5728\u88ab\u7ec8\u6b62\u65f6\u662f\u5426\u8fdb\u884c\u4e86\u6838\u5fc3\u8f6c\u50a8\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;sys\/wait.h&gt;\n#include &lt;sys\/types.h&gt;\n\nint main()\n{\n    if (fork() == 0){\n        \/\/child\n        printf(\"I am running...\\n\");\n        int *p = NULL;\n        *p = 100;\n        exit(0);\n    }\n    \/\/father\n    int status = 0;\n    waitpid(-1, &amp;status, 0);\n    printf(\"exitCode:%d, coreDump:%d, signal:%d\\n\",\n        (status &gt;&gt; 8) &amp; 0xff, (status &gt;&gt; 7) &amp; 1, status &amp; 0x7f);\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u6240\u83b7\u53d6\u7684status\u7684\u7b2c7\u4e2a\u6bd4\u7279\u4f4d\u4e3a1\uff0c\u5373\u53ef\u8bf4\u660e\u5b50\u8fdb\u7a0b\u5728\u88ab\u7ec8\u6b62\u65f6\u8fdb\u884c\u4e86\u6838\u5fc3\u8f6c\u50a8\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886530410083.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886530410083.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u56e0\u6b64\uff0ccore dump\u6807\u5fd7\u5b9e\u9645\u4e0a\u5c31\u662f\u7528\u4e8e\u8868\u793a\u7a0b\u5e8f\u5d29\u6e83\u7684\u65f6\u5019\u662f\u5426\u8fdb\u884c\u4e86\u6838\u5fc3\u8f6c\u50a8\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5176\u4ed6\u7ec4\u5408\u6309\u952e\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4ee3\u7801\uff0c\u5c061~31\u53f7\u4fe1\u53f7\u5168\u90e8\u6355\u6349\uff0c\u5c06\u6536\u5230\u4fe1\u53f7\u540e\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\u6539\u4e3a\u6253\u5370\u6536\u5230\u7684\u4fe1\u53f7\u7684\u7f16\u53f7\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;signal.h&gt;\n\nvoid handler(int signal)\n{\n    printf(\"get a signal:%d\\n\", signal);\n}\nint main()\n{\n    int signo;\n    \/\/\u6ce8\u518c1~31\u53f7\u4fe1\u53f7\n    for (signo = 1; signo &lt;= 31; signo++){\n        signal(signo, handler);\n    }\n    while (1){\n        sleep(1);\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u6b64\u65f6\uff0c\u5f53\u6211\u4eec\u6309\u4e0b\u7ec4\u5408\u952eCtrl+C\u3001Ctrl+\\\u3001Ctrl+Z\u540e\uff0c\u4fbf\u53ef\u4ee5\u77e5\u9053\u8fd9\u4e9b\u7ec4\u5408\u952e\u5206\u522b\u662f\u5411\u524d\u53f0\u8fdb\u7a0b\u53d1\u9001\u51e0\u53f7\u4fe1\u53f7\u4e86\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886640138889.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886640138889.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u4f46\u5982\u679c\u6211\u4eec\u6b64\u65f6\u5411\u8be5\u8fdb\u7a0b\u53d1\u90019\u53f7\u4fe1\u53f7\uff0c\u4f46\u8be5\u8fdb\u7a0b\u5e76\u4e0d\u4f1a\u6253\u5370\u6536\u5230\u4e869\u53f7\u4fe1\u606f\uff0c\u800c\u662f\u6267\u884c\u6536\u52309\u53f7\u4fe1\u53f7\u540e\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\uff0c\u5373\u88ab\u7ec8\u6b62\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886648141092.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167886648141092.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p><strong>\u8bf4\u660e\uff1a<\/strong> \u6709\u4e9b\u4fe1\u53f7\u662f\u4e0d\u80fd\u88ab\u6355\u6349\u7684\uff0c\u6bd4\u59829\u53f7\u4fe1\u53f7\u3002\u56e0\u4e3a\u5982\u679c\u6240\u6709\u4fe1\u53f7\u90fd\u80fd\u88ab\u6355\u6349\u7684\u8bdd\uff0c\u90a3\u4e48\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u5c06\u6240\u6709\u7684\u4fe1\u53f7\u5168\u90e8\u8fdb\u884c\u6355\u6349\u5e76\u5c06\u52a8\u4f5c\u8bbe\u7f6e\u4e3a\u5ffd\u7565\uff0c\u6b64\u65f6\u8be5\u8fdb\u7a0b\u5c06\u65e0\u6cd5\u88ab\u6740\u6b7b\uff0c\u5373\u4fbf\u662f\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u901a\u8fc7\u7cfb\u7edf\u51fd\u6570\u5411\u8fdb\u7a0b\u53d1\u4fe1\u53f7<\/h3>\n\n\n\n<p>\u5f53\u6211\u4eec\u8981\u4f7f\u7528kill\u547d\u4ee4\u5411\u4e00\u4e2a\u8fdb\u7a0b\u53d1\u9001\u4fe1\u53f7\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u4ee5<code>kill -\u4fe1\u53f7\u540d \u8fdb\u7a0bID<\/code>\u7684\u5f62\u5f0f\u8fdb\u884c\u53d1\u9001\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678867114099100.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678867114099100.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u4e5f\u53ef\u4ee5\u4ee5<code>kill -\u4fe1\u53f7\u7f16\u53f7 \u8fdb\u7a0bID<\/code>\u7684\u5f62\u5f0f\u8fdb\u884c\u53d1\u9001\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678867432888103.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678867432888103.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>kill\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n<p>\u5b9e\u9645\u4e0akill\u547d\u4ee4\u662f\u901a\u8fc7\u8c03\u7528kill\u51fd\u6570\u5b9e\u73b0\u7684\uff0ckill\u51fd\u6570\u53ef\u4ee5\u7ed9\u6307\u5b9a\u7684\u8fdb\u7a0b\u53d1\u9001\u6307\u5b9a\u7684\u4fe1\u53f7\uff0ckill\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int kill(pid_t pid, int sig);<\/code><\/pre>\n\n\n\n<p>kil\u51fd\u6570\u7528\u4e8e\u5411\u8fdb\u7a0bID\u4e3a<code>pid<\/code>\u7684\u8fdb\u7a0b\u53d1\u9001<code>sig<\/code>\u4fe1\u53f7\uff0c\u5982\u679c\u4fe1\u53f7\u53d1\u9001\u6210\u529f\uff0c\u5219\u8fd4\u56de0\uff0c\u5426\u5219\u8fd4\u56de-1\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u7528kill\u51fd\u6570\u6a21\u62df\u5b9e\u73b0\u4e00\u4e2akill\u547d\u4ee4\uff0c\u5b9e\u73b0\u903b\u8f91\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;sys\/types.h&gt;\n#include &lt;signal.h&gt;\n\nvoid Usage(char* proc)\n{\n    printf(\"Usage: %s pid signo\\n\", proc);\n}\nint main(int argc, char* argv&#91;])\n{\n    if (argc != 3){\n        Usage(argv&#91;0]);\n        return 1;\n    }\n    pid_t pid = atoi(argv&#91;1]);\n    int signo = atoi(argv&#91;2]);\n    kill(pid, signo);\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u4e3a\u4e86\u8ba9\u751f\u6210\u7684\u53ef\u6267\u884c\u7a0b\u5e8f\u5728\u6267\u884c\u65f6\u4e0d\u7528\u5e26\u4e0a\u8def\u5f84\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5f53\u524d\u8def\u5f84\u5bfc\u5165\u73af\u5883\u53d8\u91cfPATH\u5f53\u4e2d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678872018897106.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678872018897106.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u6b64\u65f6\u6211\u4eec\u4fbf\u6a21\u62df\u5b9e\u73b0\u4e86\u4e00\u4e2akill\u547d\u4ee4\uff0c\u8be5\u547d\u4ee4\u7684\u4f7f\u7528\u65b9\u5f0f\u4e3a<code>mykill \u8fdb\u7a0bID \u4fe1\u53f7\u7f16\u53f7<\/code>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678872034241109.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678872034241109.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>raise\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n<p>raise\u51fd\u6570\u53ef\u4ee5\u7ed9\u5f53\u524d\u8fdb\u7a0b\u53d1\u9001\u6307\u5b9a\u4fe1\u53f7\uff0c\u5373\u81ea\u5df1\u7ed9\u81ea\u5df1\u53d1\u9001\u4fe1\u53f7\uff0craise\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int raise(int sig);<\/code><\/pre>\n\n\n\n<p>raise\u51fd\u6570\u7528\u4e8e\u7ed9\u5f53\u524d\u8fdb\u7a0b\u53d1\u9001 <code>sig<\/code>\u53f7\u4fe1\u53f7\uff0c\u5982\u679c\u4fe1\u53f7\u53d1\u9001\u6210\u529f\uff0c\u5219\u8fd4\u56de0\uff0c\u5426\u5219\u8fd4\u56de\u4e00\u4e2a\u975e\u96f6\u503c\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e0b\u5217\u4ee3\u7801\u5f53\u4e2d\u7528raise\u51fd\u6570\u6bcf\u9694\u4e00\u79d2\u5411\u81ea\u5df1\u53d1\u9001\u4e00\u4e2a2\u53f7\u4fe1\u53f7\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;signal.h&gt;\n\nvoid handler(int signo)\n{\n    printf(\"get a signal:%d\\n\", signo);\n}\nint main()\n{\n    signal(2, handler);\n    while (1){\n        sleep(1);\n        raise(2);\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u7ed3\u679c\u5c31\u662f\u8be5\u8fdb\u7a0b\u6bcf\u9694\u4e00\u79d2\u6536\u5230\u4e00\u4e2a2\u53f7\u4fe1\u53f7\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678872680704112.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678872680704112.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>abort\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n<p>abort\u51fd\u6570\u53ef\u4ee5\u7ed9\u5f53\u524d\u8fdb\u7a0b\u53d1\u9001SIGABRT\u4fe1\u53f7\uff0c\u4f7f\u5f97\u5f53\u524d\u8fdb\u7a0b\u5f02\u5e38\u7ec8\u6b62\uff0cabort\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>void abort(void);<\/code><\/pre>\n\n\n\n<p>abort\u51fd\u6570\u662f\u4e00\u4e2a\u65e0\u53c2\u6570\u65e0\u8fd4\u56de\u503c\u7684\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e0b\u5217\u4ee3\u7801\u5f53\u4e2d\u6bcf\u9694\u4e00\u79d2\u5411\u5f53\u524d\u8fdb\u7a0b\u53d1\u9001\u4e00\u4e2aSIGABRT\u4fe1\u53f7\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;signal.h&gt;\n\nvoid handler(int signo)\n{\n    printf(\"get a signal:%d\\n\", signo);\n}\nint main()\n{\n    signal(6, handler);\n    while (1){\n        sleep(1);\n        abort();\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u4e0e\u4e4b\u524d\u4e0d\u540c\u7684\u662f\uff0c\u867d\u7136\u6211\u4eec\u5bf9SIGABRT\u4fe1\u53f7\u8fdb\u884c\u4e86\u6355\u6349\uff0c\u5e76\u4e14\u5728\u6536\u5230SIGABRT\u4fe1\u53f7\u540e\u6267\u884c\u4e86\u6211\u4eec\u7ed9\u51fa\u7684\u81ea\u5b9a\u4e49\u65b9\u6cd5\uff0c\u4f46\u662f\u5f53\u524d\u8fdb\u7a0b\u4f9d\u7136\u662f\u5f02\u5e38\u7ec8\u6b62\u4e86\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678873650765117.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-1678873650765117.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p><strong>\u8bf4\u660e\u4e00\u4e0b\uff1a<\/strong> abort\u51fd\u6570\u7684\u4f5c\u7528\u662f\u5f02\u5e38\u7ec8\u6b62\u8fdb\u7a0b\uff0cexit\u51fd\u6570\u7684\u4f5c\u7528\u662f\u6b63\u5e38\u7ec8\u6b62\u8fdb\u7a0b\uff0c\u800cabort\u672c\u8d28\u662f\u901a\u8fc7\u5411\u5f53\u524d\u8fdb\u7a0b\u53d1\u9001SIGABRT\u4fe1\u53f7\u800c\u7ec8\u6b62\u8fdb\u7a0b\u7684\uff0c\u56e0\u6b64\u4f7f\u7528exit\u51fd\u6570\u7ec8\u6b62\u8fdb\u7a0b\u53ef\u80fd\u4f1a\u5931\u8d25\uff0c\u4f46\u4f7f\u7528abort\u51fd\u6570\u7ec8\u6b62\u8fdb\u7a0b\u603b\u662f\u6210\u529f\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7531\u8f6f\u4ef6\u6761\u4ef6\u4ea7\u751f\u4fe1\u53f7<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>SIGPIPE\u4fe1\u53f7<\/p>\n<\/blockquote>\n\n\n\n<p>SIGPIPE\u4fe1\u53f7\u5b9e\u9645\u4e0a\u5c31\u662f\u4e00\u79cd\u7531\u8f6f\u4ef6\u6761\u4ef6\u4ea7\u751f\u7684\u4fe1\u53f7\uff0c\u5f53\u8fdb\u7a0b\u5728\u4f7f\u7528\u7ba1\u9053\u8fdb\u884c\u901a\u4fe1\u65f6\uff0c\u8bfb\u7aef\u8fdb\u7a0b\u5c06\u8bfb\u7aef\u5173\u95ed\uff0c\u800c\u5199\u7aef\u8fdb\u7a0b\u8fd8\u5728\u4e00\u76f4\u5411\u7ba1\u9053\u5199\u5165\u6570\u636e\uff0c\u90a3\u4e48\u6b64\u65f6\u5199\u7aef\u8fdb\u7a0b\u5c31\u4f1a\u6536\u5230SIGPIPE\u4fe1\u53f7\u8fdb\u800c\u88ab\u64cd\u4f5c\u7cfb\u7edf\u7ec8\u6b62\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u5f53\u4e2d\uff0c\u521b\u5efa\u533f\u540d\u7ba1\u9053\u8fdb\u884c\u7236\u5b50\u8fdb\u7a0b\u4e4b\u95f4\u7684\u901a\u4fe1\uff0c\u5176\u4e2d\u7236\u8fdb\u7a0b\u662f\u8bfb\u7aef\u8fdb\u7a0b\uff0c\u5b50\u8fdb\u7a0b\u662f\u5199\u7aef\u8fdb\u7a0b\uff0c\u4f46\u662f\u4e00\u5f00\u59cb\u901a\u4fe1\u7236\u8fdb\u7a0b\u5c31\u5c06\u8bfb\u7aef\u5173\u95ed\u4e86\uff0c\u90a3\u4e48\u6b64\u65f6\u5b50\u8fdb\u7a0b\u5728\u5411\u7ba1\u9053\u5199\u5165\u6570\u636e\u65f6\u5c31\u4f1a\u6536\u5230SIGPIPE\u4fe1\u53f7\uff0c\u8fdb\u800c\u88ab\u7ec8\u6b62\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;string.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;sys\/types.h&gt;\n#include &lt;sys\/wait.h&gt;\nint main()\n{\n    int fd&#91;2] = { 0 };\n    if (pipe(fd) &lt; 0){ \/\/\u4f7f\u7528pipe\u521b\u5efa\u533f\u540d\u7ba1\u9053\n        perror(\"pipe\");\n        return 1;\n    }\n    pid_t id = fork(); \/\/\u4f7f\u7528fork\u521b\u5efa\u5b50\u8fdb\u7a0b\n    if (id == 0){\n        \/\/child\n        close(fd&#91;0]); \/\/\u5b50\u8fdb\u7a0b\u5173\u95ed\u8bfb\u7aef\n        \/\/\u5b50\u8fdb\u7a0b\u5411\u7ba1\u9053\u5199\u5165\u6570\u636e\n        const char* msg = \"hello father, I am child...\";\n        int count = 10;\n        while (count--){\n            write(fd&#91;1], msg, strlen(msg));\n            sleep(1);\n        }\n        close(fd&#91;1]); \/\/\u5b50\u8fdb\u7a0b\u5199\u5165\u5b8c\u6bd5\uff0c\u5173\u95ed\u6587\u4ef6\n        exit(0);\n    }\n    \/\/father\n    close(fd&#91;1]); \/\/\u7236\u8fdb\u7a0b\u5173\u95ed\u5199\u7aef\n    close(fd&#91;0]); \/\/\u7236\u8fdb\u7a0b\u76f4\u63a5\u5173\u95ed\u8bfb\u7aef\uff08\u5bfc\u81f4\u5b50\u8fdb\u7a0b\u88ab\u64cd\u4f5c\u7cfb\u7edf\u6740\u6389\uff09\n    int status = 0;\n    waitpid(id, &amp;status, 0);\n    printf(\"child get signal:%d\\n\", status &amp; 0x7F); \/\/\u6253\u5370\u5b50\u8fdb\u7a0b\u6536\u5230\u7684\u4fe1\u53f7\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u4ee3\u7801\u540e\uff0c\u5373\u53ef\u53d1\u73b0\u5b50\u8fdb\u7a0b\u5728\u9000\u51fa\u65f6\u6536\u5230\u7684\u662f13\u53f7\u4fe1\u53f7\uff0c\u5373SIGPIPE\u4fe1\u53f7\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>SIGALRM\u4fe1\u53f7<\/p>\n<\/blockquote>\n\n\n\n<p>\u8c03\u7528alarm\u51fd\u6570\u53ef\u4ee5\u8bbe\u5b9a\u4e00\u4e2a\u95f9\u949f\uff0c\u4e5f\u5c31\u662f\u544a\u8bc9\u64cd\u4f5c\u7cfb\u7edf\u5728\u82e5\u5e72\u65f6\u95f4\u540e\u53d1\u9001SIGALRM\u4fe1\u53f7\u7ed9\u5f53\u524d\u8fdb\u7a0b\uff0calarm\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>unsigned int alarm(unsigned int second);<\/code><\/pre>\n\n\n\n<p>alarm\u51fd\u6570\u7684\u4f5c\u7528\u5c31\u662f\uff0c\u8ba9\u64cd\u4f5c\u7cfb\u7edf\u5728second\u79d2\u4e4b\u540e\u7ed9\u5f53\u524d\u8fdb\u7a0b\u53d1\u9001SIGALRM\u4fe1\u53f7\uff0cSIGALRM\u4fe1\u53f7\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\u662f\u7ec8\u6b62\u8fdb\u7a0b\u3002<\/p>\n\n\n\n<p>alarm\u51fd\u6570\u7684\u8fd4\u56de\u503c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u82e5\u8c03\u7528alarm\u51fd\u6570\u524d\uff0c\u8fdb\u7a0b\u5df2\u7ecf\u8bbe\u7f6e\u4e86\u95f9\u949f\uff0c\u5219\u8fd4\u56de\u4e0a\u4e00\u4e2a\u95f9\u949f\u65f6\u95f4\u7684\u5269\u4f59\u65f6\u95f4\uff0c\u5e76\u4e14\u672c\u6b21\u95f9\u949f\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u4e0a\u4e00\u6b21\u95f9\u949f\u7684\u8bbe\u7f6e\u3002<\/li>\n\n\n\n<li>\u82e5\u8c03\u7528alarm\u51fd\u6570\u524d\uff0c\u8fdb\u7a0b\u6ca1\u6709\u8bbe\u7f6e\u95f9\u949f\uff0c\u5219\u8fd4\u56de\u503c\u4e3a0.<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u6d4b\u8bd5\u81ea\u5df1\u7684\u4e91\u670d\u52a1\u5668\u4e00\u79d2\u65f6\u95f4\u5185\u53ef\u4ee5\u5c06\u4e00\u4e2a\u53d8\u91cf\u7d2f\u52a0\u5230\u591a\u5927\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;signal.h&gt;\n#include &lt;unistd.h&gt;\n\nint main()\n{\n    int count = 0;\n    alarm(1);\n    while (1){\n        count++;\n        printf(\"count: %d\\n\", count);\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u4ee3\u7801\u540e\uff0c\u53ef\u4ee5\u53d1\u73b0\u6211\u5f53\u524d\u7684\u4e91\u670d\u52a1\u5668\u5728\u4e00\u79d2\u5185\u53ef\u4ee5\u5c06\u4e00\u4e2a\u53d8\u91cf\u7d2f\u52a0\u5230\u4e24\u4e07\u5de6\u53f3\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16794675345983.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16794675345983.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u4f46\u5b9e\u9645\u4e0a\u6211\u5f53\u524d\u7684\u4e91\u670d\u52a1\u5668\u5728\u4e00\u79d2\u5185\u53ef\u4ee5\u6267\u884c\u7684\u7d2f\u52a0\u6b21\u6570\u8fdc\u5927\u4e8e\u4e24\u4e07\uff0c\u90a3\u4e3a\u4ec0\u4e48\u4e0a\u8ff0\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u6bd4\u5b9e\u9645\u7ed3\u679c\u8981\u5c0f\u5462\uff1f<\/p>\n\n\n\n<p>\u4e3b\u8981\u539f\u56e0\u6709\u4e24\u4e2a\uff0c\u9996\u5148\uff0c\u7531\u4e8e\u6211\u4eec\u6bcf\u8fdb\u884c\u4e00\u6b21\u7d2f\u52a0\u5c31\u8fdb\u884c\u4e86\u4e00\u6b21\u6253\u5370\u64cd\u4f5c\uff0c\u800c\u4e0e\u5916\u8bbe\u4e4b\u95f4\u7684IO\u64cd\u4f5c\u6240\u9700\u7684\u65f6\u95f4\u8981\u6bd4\u7d2f\u52a0\u64cd\u4f5c\u7684\u65f6\u95f4\u66f4\u957f\uff0c\u5176\u6b21\uff0c\u7531\u4e8e\u6211\u5f53\u524d\u4f7f\u7528\u7684\u662f\u4e91\u670d\u52a1\u5668\uff0c\u56e0\u6b64\u5728\u7d2f\u52a0\u64cd\u4f5c\u540e\u8fd8\u9700\u8981\u5c06\u7d2f\u52a0\u7ed3\u679c\u901a\u8fc7\u7f51\u7edc\u4f20\u8f93\u5c06\u670d\u52a1\u5668\u4e0a\u7684\u6570\u636e\u53d1\u9001\u8fc7\u6765\uff0c\u56e0\u6b64\u6700\u7ec8\u663e\u793a\u7684\u7ed3\u679c\u8981\u6bd4\u5b9e\u9645\u4e00\u79d2\u5185\u53ef\u7d2f\u52a0\u7684\u6b21\u6570\u5c0f\u5f97\u591a\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u5c3d\u53ef\u80fd\u907f\u514d\u4e0a\u8ff0\u95ee\u9898\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u8ba9count\u53d8\u91cf\u4e00\u76f4\u6267\u884c\u7d2f\u52a0\u64cd\u4f5c\uff0c\u76f4\u5230\u4e00\u79d2\u540e\u8fdb\u7a0b\u6536\u5230SIGALRM\u4fe1\u53f7\u540e\u518d\u6253\u5370\u7d2f\u52a0\u540e\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;signal.h&gt;\n#include &lt;unistd.h&gt;\n\nint count = 0;\nvoid handler(int signo)\n{\n    printf(\"get a signal: %d\\n\", signo);\n    printf(\"count: %d\\n\", count);\n    exit(1);\n}\nint main()\n{\n    signal(SIGALRM, handler);\n    alarm(1);\n    while (1){\n        count++;\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u6b64\u65f6\u53ef\u4ee5\u770b\u5230\uff0ccount\u53d8\u91cf\u5728\u4e00\u79d2\u5185\u88ab\u7d2f\u52a0\u7684\u6b21\u6570\u53d8\u6210\u4e865\u4ebf\u591a\uff0c\u7531\u6b64\u4e5f\u8bc1\u660e\u4e86\u4e0e\u8ba1\u7b97\u673a\u5355\u7eaf\u7684\u8ba1\u7b97\u76f8\u6bd4\u8f83\uff0c\u8ba1\u7b97\u673a\u4e0e\u5916\u8bbe\u8fdb\u884cIO\u65f6\u7684\u901f\u5ea6\u662f\u975e\u5e38\u6162\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16794680612546.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16794680612546.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u7531\u786c\u4ef6\u5f02\u5e38\u4ea7\u751f\u4fe1\u53f7<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u4e3a\u4ec0\u4e48C\/C++\u7a0b\u5e8f\u4f1a\u5d29\u6e83\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u5f53\u6211\u4eec\u7a0b\u5e8f\u4e2d\u51fa\u73b0\u7c7b\u4f3c\u4e8e\u96640\u3001\u91ce\u6307\u9488\u3001\u8d8a\u754c\u4e4b\u7c7b\u7684\u9519\u8bef\u65f6\uff0c\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u4f1a\u5d29\u6e83\uff1f\u672c\u8d28\u4e0a\u662f\u56e0\u4e3a\u8fdb\u7a0b\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u6536\u5230\u4e86\u64cd\u4f5c\u7cfb\u7edf\u53d1\u6765\u7684\u4fe1\u53f7\u8fdb\u800c\u88ab\u7ec8\u6b62\uff0c\u90a3\u64cd\u4f5c\u7cfb\u7edf\u662f\u5982\u4f55\u8bc6\u522b\u5230\u4e00\u4e2a\u8fdb\u7a0b\u89e6\u53d1\u4e86\u67d0\u79cd\u95ee\u9898\u7684\u5462\uff1f<\/p>\n\n\n\n<p>\u6211\u4eec\u77e5\u9053\uff0cCPU\u5f53\u4e2d\u6709\u4e00\u5806\u7684\u5bc4\u5b58\u5668\uff0c\u5f53\u6211\u4eec\u9700\u8981\u5bf9\u4e24\u4e2a\u6570\u8fdb\u884c\u7b97\u672f\u8fd0\u7b97\u65f6\uff0c\u6211\u4eec\u662f\u5148\u5c06\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u6570\u5206\u522b\u653e\u5230\u4e24\u4e2a\u5bc4\u5b58\u5668\u5f53\u4e2d\uff0c\u7136\u540e\u8fdb\u884c\u7b97\u672f\u8fd0\u7b97\u5e76\u628a\u7ed3\u679c\u5199\u56de\u5bc4\u5b58\u5668\u5f53\u4e2d\u3002\u6b64\u5916\uff0cCPU\u5f53\u4e2d\u8fd8\u6709\u4e00\u7ec4\u5bc4\u5b58\u5668\u53eb\u505a\u72b6\u6001\u5bc4\u5b58\u5668\uff0c\u5b83\u53ef\u4ee5\u7528\u6765\u6807\u8bb0\u5f53\u524d\u6307\u4ee4\u6267\u884c\u7ed3\u679c\u7684\u5404\u79cd\u72b6\u6001\u4fe1\u606f\uff0c\u5982\u6709\u65e0\u8fdb\u4f4d\u3001\u6709\u65e0\u6ea2\u51fa\u7b49\u7b49\u3002\u800c\u64cd\u4f5c\u7cfb\u7edf\u662f\u8f6f\u786c\u4ef6\u8d44\u6e90\u7684\u7ba1\u7406\u8005\uff0c\u5728\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u82e5\u64cd\u4f5c\u7cfb\u7edf\u53d1\u73b0CPU\u5185\u7684\u67d0\u4e2a\u72b6\u6001\u6807\u5fd7\u4f4d\u88ab\u7f6e\u4f4d\uff0c\u800c\u8fd9\u6b21\u7f6e\u4e3a\u5c31\u662f\u56e0\u4e3a\u51fa\u73b0\u4e86\u67d0\u79cd\u96640\u9519\u8bef\u800c\u5bfc\u81f4\u7684\uff0c\u90a3\u4e48\u6b64\u65f6\u64cd\u4f5c\u7cfb\u7edf\u5c31\u4f1a\u9a6c\u4e0a\u8bc6\u522b\u5f53\u524d\u662f\u54ea\u4e2a\u8fdb\u7a0b\u5bfc\u81f4\u7684\u8be5\u9519\u8bef\uff0c\u5e76\u5c06\u6240\u8bc6\u522b\u5230\u7684\u786c\u4ef6\u5305\u88c5\u6210\u4fe1\u53f7\u53d1\u9001\u7ed9\u76ee\u6807\u8fdb\u7a0b\uff0c\u672c\u8d28\u5c31\u662f\u64cd\u4f5c\u7cfb\u7edf\u76f4\u63a5\u53bb\u627e\u8fd9\u4e2a\u8fdb\u7a0b\u7684task_struct\uff0c\u5e76\u5411\u8be5\u8fdb\u7a0b\u7684\u4f4d\u56fe\u4e2d\u5199\u51658\u4fe1\u53f7\uff0c\u5199\u51658\u53f7\u4fe1\u53f7\u540e\u8fd9\u4e2a\u8fdb\u7a0b\u5c31\u4f1a\u5728\u5408\u9002\u7684\u65f6\u5019\u88ab\u7ec8\u6b62\u3002<\/p>\n\n\n\n<p>\u90a3\u5bf9\u4e8e\u4e0b\u9762\u7684\u91ce\u6307\u9488\u95ee\u9898\uff0c\u6216\u8005\u8d8a\u754c\u8bbf\u95ee\u7684\u95ee\u9898\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u53c8\u662f\u5982\u4f55\u8bc6\u522b\u5230\u7684\u5462\uff1f<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167946941787024.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167946941787024.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167946943346527.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167946943346527.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u9996\u5148\u6211\u4eec\u5fc5\u987b\u77e5\u9053\u7684\u662f\uff0c\u5f53\u6211\u4eec\u8981\u8bbf\u95ee\u4e00\u4e2a\u53d8\u91cf\u65f6\uff0c\u4e00\u5b9a\u8981\u5148\u7ecf\u8fc7\u9875\u8868\u7684\u6620\u5c04\uff0c\u5c06\u865a\u62df\u5730\u5740\u8f6c\u6362\u6210\u7269\u7406\u5730\u5740\uff0c\u7136\u540e\u624d\u80fd\u8fdb\u884c\u76f8\u5e94\u7684\u8bbf\u95ee\u64cd\u4f5c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167946945347033.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167946945347033.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u5176\u4e2d\u9875\u8868\u5c5e\u4e8e\u4e00\u79cd\u8f6f\u4ef6\u6620\u5c04\u5173\u7cfb\uff0c\u800c\u5b9e\u9645\u4e0a\u5728\u4ece\u865a\u62df\u5730\u5740\u5230\u7269\u7406\u5730\u5740\u6620\u5c04\u7684\u65f6\u5019\u8fd8\u6709\u4e00\u4e2a\u786c\u4ef6\u53eb\u505aMMU\uff0c\u5b83\u662f\u4e00\u79cd\u8d1f\u8d23\u5904\u7406CPU\u7684\u5185\u5b58\u8bbf\u95ee\u8bf7\u6c42\u7684\u8ba1\u7b97\u673a\u786c\u4ef6\uff0c\u56e0\u6b64\u6620\u5c04\u5de5\u4f5c\u4e0d\u662f\u7531CPU\u505a\u7684\uff0c\u800c\u662f\u7531MMU\u505a\u7684\uff0c\u4f46\u73b0\u5728MMU\u5df2\u7ecf\u96c6\u6210\u5230CPU\u5f53\u4e2d\u4e86\u3002<\/p>\n\n\n\n<p>\u5f53\u9700\u8981\u8fdb\u884c\u865a\u62df\u5730\u5740\u5230\u7269\u7406\u5730\u5740\u7684\u6620\u5c04\u65f6\uff0c\u6211\u4eec\u5148\u5c06\u9875\u8868\u7684\u5de6\u4fa7\u7684\u865a\u62df\u5730\u5740\u5bfc\u7ed9MMU\uff0c\u7136\u540eMMU\u4f1a\u8ba1\u7b97\u51fa\u5bf9\u5e94\u7684\u7269\u7406\u5730\u5740\uff0c\u6211\u4eec\u518d\u901a\u8fc7\u8fd9\u4e2a\u7269\u7406\u5730\u5740\u8fdb\u884c\u76f8\u5e94\u7684\u8bbf\u95ee\u3002<\/p>\n\n\n\n<p>\u800cMMU\u65e2\u7136\u662f\u786c\u4ef6\u5355\u5143\uff0c\u90a3\u4e48\u5b83\u5f53\u7136\u4e5f\u6709\u76f8\u5e94\u7684\u72b6\u6001\u4fe1\u606f\uff0c\u5f53\u6211\u4eec\u8981\u8bbf\u95ee\u4e0d\u5c5e\u4e8e\u6211\u4eec\u7684\u865a\u62df\u5730\u5740\u65f6\uff0cMMU\u5728\u8fdb\u884c\u865a\u62df\u5730\u5740\u5230\u7269\u7406\u5730\u5740\u7684\u8f6c\u6362\u65f6\u5c31\u4f1a\u51fa\u73b0\u9519\u8bef\uff0c\u7136\u540e\u5c06\u5bf9\u5e94\u7684\u9519\u8bef\u5199\u5165\u5230\u81ea\u5df1\u7684\u72b6\u6001\u4fe1\u606f\u5f53\u4e2d\uff0c\u8fd9\u65f6\u786c\u4ef6\u4e0a\u9762\u7684\u4fe1\u606f\u4e5f\u4f1a\u7acb\u9a6c\u88ab\u64cd\u4f5c\u7cfb\u7edf\u8bc6\u522b\u5230\uff0c\u8fdb\u800c\u5c06\u5bf9\u5e94\u8fdb\u7a0b\u53d1\u9001SIGSEGV\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p><strong>\u603b\u7ed3\u4e00\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<p>C\/C++\u7a0b\u5e8f\u4f1a\u5d29\u6e83\uff0c\u662f\u56e0\u4e3a\u7a0b\u5e8f\u5f53\u4e2d\u51fa\u73b0\u7684\u5404\u79cd\u9519\u8bef\u6700\u7ec8\u4e00\u5b9a\u4f1a\u5728\u786c\u4ef6\u5c42\u9762\u6709\u6240\u8868\u73b0\uff0c\u8fdb\u800c\u4f1a\u88ab\u64cd\u4f5c\u7cfb\u7edf\u8bc6\u522b\u5230\uff0c\u7136\u540e\u64cd\u4f5c\u7cfb\u7edf\u5c31\u4f1a\u53d1\u9001\u76f8\u5e94\u7684\u4fe1\u53f7\u5c06\u5f53\u524d\u7684\u8fdb\u7a0b\u7ec8\u6b62\u3002<\/p>\n\n\n\n<h2 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class=\"wp-block-list\">\n<li>\u5b9e\u9645\u6267\u884c\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\uff0c\u79f0\u4e3a\u4fe1\u53f7\u9012\u8fbe\uff08Delivery\uff09\u3002<\/li>\n\n\n\n<li>\u4fe1\u53f7\u4ece\u4ea7\u751f\u5230\u9012\u8fbe\u4e4b\u95f4\u7684\u72b6\u6001\uff0c\u79f0\u4e3a\u4fe1\u53f7\u672a\u51b3\uff08pending\uff09\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b\u53ef\u4ee5\u9009\u62e9\u963b\u585e\uff08Block\uff09\u67d0\u4e2a\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>\u88ab\u963b\u585e\u7684\u4fe1\u53f7\u4ea7\u751f\u65f6\u5c06\u4fdd\u6301\u5728\u672a\u51b3\u72b6\u6001\uff0c\u76f4\u5230\u8fdb\u7a0b\u89e3\u51b3\u5bf9\u6b64\u4fe1\u53f7\u7684\u963b\u585e\uff0c\u624d\u6267\u884c\u9012\u8fbe\u7684\u52a8\u4f5c\u3002<\/li>\n\n\n\n<li>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u963b\u585e\u548c\u5ffd\u7565\u662f\u4e0d\u540c\u7684\uff0c\u53ea\u8981\u4fe1\u53f7\u88ab\u963b\u585e\u5c31\u4e0d\u4f1a\u88ab\u9012\u8fbe\uff0c\u800c\u5ffd\u7565\u662f\u5728\u9012\u8fbe\u4e4b\u540e\u7684\u4e00\u79cd\u5904\u7406\u52a8\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5728\u5185\u6838\u4e2d\u7684\u8868\u793a<\/h3>\n\n\n\n<p>\u4fe1\u53f7\u5728\u5185\u6838\u4e2d\u7684\u8868\u793a\u793a\u610f\u56fe\u5982\u4e0b\uff1a<img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167947670741038.png\" alt=\"img\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6bcf\u4e2a\u4fe1\u53f7\u90fd\u6709\u4e24\u4e2a\u6807\u5fd7\u4f4d\u5206\u522b\u8868\u793a\u963b\u585e\uff08block\uff09\u548c\u672a\u51b3\uff08pending\uff09\uff0c\u8fd8\u6709\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u8868\u793a\u5904\u7406\u52a8\u4f5c\u3002\u4fe1\u53f7\u4ea7\u751f\u65f6\uff0c\u5185\u6838\u5728\u8fdb\u7a0b\u63a7\u5236\u5757\u4e2d\u8bbe\u7f6e\u8be5\u4fe1\u53f7\u7684\u672a\u51b3\u6807\u5fd7\uff0c\u76f4\u5230\u4fe1\u53f7\u9012\u8fbe\u624d\u6e05\u9664\u8be5\u6807\u5fd7\u3002\u5728\u4e0a\u56fe\u4e2d\uff0cSIGHUP\u4fe1\u53f7\u672a\u963b\u585e\u4e5f\u672a\u4ea7\u751f\u8fc7\uff0c\u5f53\u4ed6\u9012\u8fbe\u65f6\u6267\u884c\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\u3002<\/li>\n\n\n\n<li>SIGINT\u4fe1\u53f7\u4ea7\u751f\u8fc7\uff0c\u4f46\u6b63\u5728\u88ab\u963b\u585e\uff0c\u6240\u4ee5\u6682\u65f6\u4e0d\u80fd\u9012\u8fbe\u3002\u867d\u7136\u5b83\u7684\u5904\u7406\u52a8\u4f5c\u662f\u5ffd\u7565\uff0c\u4f46\u5728\u6ca1\u6709\u89e3\u9664\u963b\u585e\u4e4b\u524d\u4e0d\u80fd\u5ffd\u7565\u8fd9\u4e2a\u4fe1\u53f7\uff0c\u56e0\u4e3a\u8fdb\u7a0b\u4ecd\u7136\u6709\u673a\u4f1a\u5728\u6539\u53d8\u5904\u7406\u52a8\u4f5c\u4e4b\u540e\u518d\u89e3\u9664\u963b\u585e\u3002<\/li>\n\n\n\n<li>SIGQUIT\u4fe1\u53f7\u4e3a\u4ea7\u751f\u8fc7\uff0c\u4f46\u4e00\u65e6\u4ea7\u751fSIGQUIT\u4fe1\u53f7\uff0c\u8be5\u4fe1\u53f7\u5c06\u88ab\u963b\u585e\uff0c\u5b83\u7684\u5904\u7406\u52a8\u4f5c\u662f\u7528\u6237\u81ea\u5b9a\u4e49\u51fd\u6570sighandler\u3002\u5982\u679c\u5728\u8fdb\u7a0b\u89e3\u9664\u5bf9\u67d0\u4fe1\u53f7\u7684\u963b\u585e\u4e4b\u524d\uff0c\u8fd9\u79cd\u4fe1\u53f7\u4ea7\u751f\u8fc7\u591a\u6b21\uff0cPOSIX.1\u5141\u8bb8\u7cfb\u7edf\u9012\u8fbe\u8be5\u4fe1\u53f7\u4e00\u6b21\u6216\u591a\u6b21\u3002Linux\u662f\u8fd9\u6837\u5b9e\u73b0\u7684\uff1a\u666e\u901a\u4fe1\u53f7\u5728\u9012\u8fbe\u4e4b\u524d\u4ea7\u751f\u591a\u6b21\u53ea\u8ba1\u4e00\u6b21\uff0c\u800c\u5b9e\u65f6\u4fe1\u53f7\u5728\u9012\u8fbe\u4e4b\u524d\u4ea7\u751f\u591a\u6b21\u53ef\u4ee5\u4f9d\u6b21\u653e\u5728\u4e00\u4e2a\u961f\u5217\u91cc\uff0c\u8fd9\u91cc\u53ea\u8ba8\u8bba\u666e\u901a\u4fe1\u53f7\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u603b\u7ed3\u4e00\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5728block\u4f4d\u56fe\u4e2d\uff0c\u6bd4\u7279\u4f4d\u7684\u4f4d\u7f6e\u4ee3\u8868\u67d0\u4e00\u4e2a\u4fe1\u53f7\uff0c\u6bd4\u7279\u4f4d\u7684\u5185\u5bb9\u4ee3\u8868\u8be5\u4fe1\u53f7\u662f\u5426\u88ab\u963b\u585e\u3002<\/li>\n\n\n\n<li>\u5728pending\u4f4d\u56fe\u4e2d\uff0c\u6bd4\u7279\u4f4d\u7684\u4f4d\u7f6e\u4ee3\u8868\u67d0\u4e00\u4e2a\u4fe1\u53f7\uff0c\u6bd4\u7279\u4f4d\u7684\u5185\u5bb9\u4ee3\u8868\u662f\u5426\u6536\u5230\u8be5\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>handler\u8868\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u6570\u7ec4\uff0c\u6570\u7ec4\u7684\u4e0b\u6807\u4ee3\u8868\u67d0\u4e00\u4e2a\u4fe1\u53f7\uff0c\u6570\u7ec4\u7684\u5185\u5bb9\u4ee3\u8868\u8be5\u4fe1\u53f7\u9012\u8fbe\u65f6\u7684\u5904\u7406\u52a8\u4f5c\uff0c\u5904\u7406\u52a8\u4f5c\u5305\u62ec\u9ed8\u8ba4\u3001\u5ffd\u7565\u4ee5\u53ca\u81ea\u5b9a\u4e49\u3002<\/li>\n\n\n\n<li>block\u3001pending\u3001handler\u8fd9\u4e09\u5f20\u8868\u7684\u6bcf\u4e00\u4f4d\u7f6e\u662f\u4e00\u4e00\u5bf9\u5e94\u7684\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">sigset_t<\/h3>\n\n\n\n<p>\u6839\u636e\u4fe1\u53f7\u5728\u5185\u6838\u4e2d\u7684\u8868\u793a\u65b9\u6cd5\uff0c\u6bcf\u4e2a\u4fe1\u53f7\u7684\u672a\u51b3\u6807\u5fd7\u53ea\u6709\u4e00\u4e2a\u6bd4\u7279\u4f4d\uff0c\u975e0\u53731\uff0c\u5982\u679c\u4e0d\u8bb0\u5f55\u8be5\u4fe1\u53f7\u4ea7\u751f\u4e86\u591a\u5c11\u6b21\uff0c\u90a3\u4e48\u963b\u585e\u6807\u5fd7\u4e5f\u53ea\u6709\u4e00\u4e2a\u6bd4\u7279\u4f4d\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u672a\u51b3\u548c\u963b\u585e\u6807\u5fd7\u53ef\u4ee5\u7528\u76f8\u540c\u7684\u6570\u636e\u7c7b\u578bsigset_t\u6765\u5b58\u50a8\u3002\u5728\u6211\u5f53\u524d\u7684\u4e91\u670d\u52a1\u5668\u4e2d\uff0csigset_t\u7c7b\u578b\u7684\u5b9a\u4e49\u5982\u4e0b\uff1a\uff08\u4e0d\u540c\u7684\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u73b0sigset_t\u7684\u65b9\u6848\u53ef\u80fd\u4e0d\u540c\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#define _SIGSET_NWORDS (1024 \/ (8 * sizeof (unsigned long int)))\ntypedef struct\n{\n    unsigned long int __val&#91;_SIGSET_NWORDS];\n} __sigset_t;\n\ntypedef __sigset_t sigset_t;<\/code><\/pre>\n\n\n\n<p>sigset_t\u79f0\u4e3a\u4fe1\u53f7\u96c6\uff0c\u8fd9\u4e2a\u7c7b\u578b\u53ef\u4ee5\u8868\u793a\u6bcf\u4e2a\u4fe1\u53f7\u7684&#8221;\u6709\u6548&#8221;\u548c&#8221;\u65e0\u6548&#8221;\u72b6\u6001\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728\u963b\u585e\u4fe1\u53f7\u96c6\u4e2d\u201c\u6709\u6548\u201d\u548c\u201c\u65e0\u6548\u201d\u7684\u542b\u4e49\u662f\u8be5\u4fe1\u53f7\u662f\u5426\u88ab\u963b\u585e\u3002<\/li>\n\n\n\n<li>\u5728\u672a\u51b3\u4fe1\u53f7\u96c6\u4e2d\u201c\u6709\u6548\u201d\u548c\u201c\u65e0\u6548\u201d\u7684\u542b\u4e49\u662f\u8be5\u4fe1\u53f7\u662f\u5426\u5904\u4e8e\u672a\u51b3\u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u963b\u585e\u4fe1\u53f7\u96c6\u4e5f\u53eb\u505a\u5f53\u524d\u8fdb\u7a0b\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\uff08Signal Mask\uff09\uff0c\u8fd9\u91cc\u7684&#8221;\u5c4f\u853d&#8221;\u5e94\u8be5\u7406\u89e3\u4e3a\u963b\u585e\u800c\u4e0d\u662f\u5ffd\u7565\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570<\/h3>\n\n\n\n<p>sigset_t\u7c7b\u578b\u5bf9\u4e8e\u6bcf\u79cd\u4fe1\u53f7\u7528\u4e00\u4e2abit\u8868\u793a&#8221;\u6709\u6548&#8221;\u6216&#8221;\u65e0\u6548&#8221;\uff0c\u81f3\u4e8e\u8fd9\u4e2a\u7c7b\u578b\u5185\u90e8\u5982\u4f55\u5b58\u50a8\u8fd9\u4e9bbit\u5219\u4f9d\u8d56\u4e8e\u7cfb\u7edf\u7684\u5b9e\u73b0\uff0c\u4ece\u4f7f\u7528\u8005\u7684\u89d2\u5ea6\u662f\u4e0d\u5fc5\u5173\u5fc3\u7684\uff0c\u4f7f\u7528\u8005\u53ea\u80fd\u8c03\u7528\u4ee5\u4e0b\u51fd\u6570\u6765\u64cd\u4f5csigset_t\u53d8\u91cf\uff0c\u800c\u4e0d\u5e94\u8be5\u5bf9\u5b83\u7684\u5185\u90e8\u6570\u636e\u505a\u4efb\u4f55\u89e3\u91ca\uff0c\u6bd4\u5982\u7528printf\u76f4\u63a5\u6253\u5370sigset_t\u53d8\u91cf\u662f\u6ca1\u6709\u610f\u4e49\u7684\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;signal.h&gt;\n\nint sigemptyset(sigset_t *set);\n\nint sigfillset(sigset_t *set);\n\nint sigaddset(sigset_t *set, int signum);\n\nint sigdelset(sigset_t *set, int signum);\n\nint sigismember(const sigset_t *set, int signum);  <\/code><\/pre>\n\n\n\n<p><strong>\u51fd\u6570\u89e3\u91ca\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>sigemptyset\u51fd\u6570\uff1a\u521d\u59cb\u5316set\u6240\u6307\u5411\u7684\u4fe1\u53f7\u96c6\uff0c\u4f7f\u5176\u4e2d\u6240\u6709\u4fe1\u53f7\u7684\u5bf9\u5e94bit\u6e05\u96f6\uff0c\u8868\u793a\u8be5\u4fe1\u53f7\u96c6\u4e0d\u5305\u542b\u4efb\u4f55\u6709\u6548\u4fe1\u606f\u3002<\/li>\n\n\n\n<li>sigfillset\u51fd\u6570\uff1a\u521d\u59cb\u5316set\u6240\u6307\u5411\u7684\u4fe1\u53f7\u96c6\uff0c\u4f7f\u5176\u4e2d\u6240\u6709\u4fe1\u53f7\u7684\u5bf9\u5e94bit\u7f6e\u4f4d\uff0c\u8868\u793a\u8be5\u4fe1\u53f7\u96c6\u7684\u6709\u6548\u4fe1\u53f7\u5305\u62ec\u7cfb\u7edf\u652f\u6301\u7684\u6240\u6709\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>sigaddset\u51fd\u6570\uff1a\u5728set\u6240\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u6dfb\u52a0\u67d0\u79cd\u6709\u6548\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>sigdelset\u51fd\u6570\uff1a\u5728set\u6240\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u5220\u9664\u67d0\u79cd\u6709\u6548\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>sigemptyset\u3001sigfillset\u3001sigaddset\u548csigdelset\u51fd\u6570\u90fd\u662f\u6210\u529f\u8fd4\u56de0\uff0c\u51fa\u9519\u8fd4\u56de-1\u3002<\/li>\n\n\n\n<li>sigismember\u51fd\u6570\uff1a\u5224\u65ad\u5728set\u6240\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u662f\u5426\u5305\u542b\u67d0\u79cd\u4fe1\u53f7\uff0c\u82e5\u5305\u542b\u5219\u8fd4\u56de1\uff0c\u4e0d\u5305\u542b\u5219\u8fd4\u56de0\uff0c\u8c03\u7528\u5931\u8d25\u8fd4\u56de-1\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong> \u5728\u4f7f\u7528sigset_t\u7c7b\u578b\u7684\u53d8\u91cf\u4e4b\u524d\uff0c\u4e00\u5b9a\u8981\u8c03\u7528sigemptyset\u6216sigfillset\u505a\u521d\u59cb\u5316\uff0c\u4f7f\u4fe1\u53f7\u5904\u4e8e\u786e\u5b9a\u7684\u72b6\u6001\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u6309\u7167\u5982\u4e0b\u65b9\u5f0f\u4f7f\u7528\u8fd9\u4e9b\u51fd\u6570\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;signal.h&gt;\n\nint main()\n{\n    sigset_t s; \/\/\u7528\u6237\u7a7a\u95f4\u5b9a\u4e49\u7684\u53d8\u91cf\n\n    sigemptyset(&amp;s);\n\n    sigfillset(&amp;s);\n\n    sigaddset(&amp;s, SIGINT);\n\n    sigdelset(&amp;s, SIGINT);\n\n    sigismember(&amp;s, SIGINT);\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong> \u4ee3\u7801\u4e2d\u5b9a\u4e49\u7684sigset_t\u7c7b\u578b\u7684\u53d8\u91cfs\uff0c\u4e0e\u6211\u4eec\u5e73\u5e38\u5b9a\u4e49\u7684\u53d8\u91cf\u4e00\u6837\u90fd\u662f\u5728\u7528\u6237\u7a7a\u95f4\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u6240\u4ee5\u540e\u9762\u6211\u4eec\u7528\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570\u5bf9\u53d8\u91cfs\u7684\u64cd\u4f5c\u5b9e\u9645\u4e0a\u53ea\u662f\u5bf9\u7528\u6237\u7a7a\u95f4\u7684\u53d8\u91cfs\u505a\u4e86\u4fee\u6539\uff0c\u5e76\u4e0d\u4f1a\u5f71\u54cd\u8fdb\u7a0b\u7684\u4efb\u4f55\u884c\u4e3a\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528\uff0c\u624d\u80fd\u5c06\u53d8\u91cfs\u7684\u6570\u636e\u8bbe\u7f6e\u8fdb\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">sigprocmask<\/h3>\n\n\n\n<p>sigprocmask\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u8bfb\u53d6\u6216\u66f4\u6539\u8fdb\u7a0b\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\uff08\u963b\u585e\u4fe1\u53f7\u96c6\uff09\uff0c\u8be5\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int sigprocmask(int how, const sigset_t* set, sigset_t* oldset);<\/code><\/pre>\n\n\n\n<p><strong>\u53c2\u6570\u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679coset\u662f\u975e\u7a7a\u6307\u9488\uff0c\u5219\u8bfb\u53d6\u8fdb\u7a0b\u5f53\u524d\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\u901a\u8fc7oset\u53c2\u6570\u4f20\u51fa\u3002<\/li>\n\n\n\n<li>\u5982\u679cset\u662f\u975e\u7a7a\u6307\u9488\uff0c\u5219\u66f4\u6539\u8fdb\u7a0b\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\uff0c\u53c2\u6570how\u6307\u793a\u5982\u4f55\u66f4\u6539\u3002<\/li>\n\n\n\n<li>\u5982\u679coset\u548cset\u90fd\u662f\u975e\u7a7a\u6307\u9488\uff0c\u5219\u5148\u5c06\u539f\u6765\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\u5907\u4efd\u5230oset\u91cc\uff0c\u7136\u540e\u6839\u636eset\u548chow\u53c2\u6570\u66f4\u6539\u4fe1\u53f7\u5c4f\u853d\u5b57\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5047\u8bbe\u5f53\u524d\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\u4e3amask\uff0c\u4e0b\u8868\u8bf4\u660e\u4e86how\u53c2\u6570\u7684\u53ef\u9009\u503c\u53ca\u5176\u542b\u4e49\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">\u9009\u9879<\/th><th class=\"has-text-align-center\" data-align=\"center\">\u542b\u4e49<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">SIG_BLOCK<\/td><td class=\"has-text-align-center\" data-align=\"center\">set\u5305\u542b\u4e86\u6211\u4eec\u5e0c\u671b\u6dfb\u52a0\u5230\u5f53\u524d\u4fe1\u53f7\u5c4f\u853d\u5b57\u7684\u4fe1\u53f7\uff0c\u76f8\u5f53\u4e8emask=mask|set<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">SIG_UNBLOCK<\/td><td class=\"has-text-align-center\" data-align=\"center\">set\u5305\u542b\u4e86\u6211\u4eec\u5e0c\u671b\u4ece\u5f53\u524d\u4fe1\u53f7\u5c4f\u853d\u5b57\u4e2d\u89e3\u9664\u963b\u585e\u7684\u4fe1\u53f7\uff0c\u76f8\u5f53\u4e8emask=mask|~set<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">SIG_SETMASK<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u8bbe\u7f6e\u5f53\u524d\u4fe1\u53f7\u5c4f\u853d\u5b57\u4e3aset\u6240\u6307\u5411\u7684\u503c\uff0c\u76f8\u5f53\u4e8emask=set<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>\u8fd4\u56de\u503c\u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>sigprocmask\u51fd\u6570\u8c03\u7528\u6210\u529f\u8fd4\u56de0\uff0c\u51fa\u9519\u8fd4\u56de-1\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong> \u5982\u679c\u8c03\u7528sigprocmask\u89e3\u9664\u4e86\u5bf9\u5f53\u524d\u82e5\u5e72\u4e2a\u672a\u51b3\u4fe1\u53f7\u7684\u963b\u585e\uff0c\u5219\u5728sigprocmask\u51fd\u6570\u8fd4\u56de\u524d\uff0c\u81f3\u5c11\u5c06\u5176\u4e2d\u4e00\u4e2a\u4fe1\u53f7\u9012\u8fbe\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">sigpending<\/h3>\n\n\n\n<p>sigpending\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u8bfb\u53d6\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u96c6\uff0c\u8be5\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int sigpending(sigset_t* set);<\/code><\/pre>\n\n\n\n<p>sigpending\u51fd\u6570\u8bfb\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u96c6\uff0c\u5e76\u901a\u8fc7set\u53c2\u6570\u4f20\u51fa\u3002\u8be5\u51fd\u6570\u8c03\u7528\u6210\u529f\u8fd4\u56de0\uff0c\u51fa\u9519\u8fd4\u56de-1\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u4e0b\u9762\u6211\u4eec\u6765\u505a\u4e00\u4e2a\u7b80\u5355\u7684\u5b9e\u9a8c<\/p>\n<\/blockquote>\n\n\n\n<p>\u5b9e\u9a8c\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u7528\u4e0a\u8ff0\u7684\u51fd\u6570\u5c062\u53f7\u4fe1\u53f7\u8fdb\u884c\u5c4f\u853d\uff08\u963b\u585e\uff09\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528kill\u547d\u4ee4\u6216\u7ec4\u5408\u952e\u5411\u8fdb\u7a0b\u53d1\u90012\u53f7\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>\u6b64\u65f62\u53f7\u4fe1\u53f7\u4f1a\u4e00\u76f4\u88ab\u963b\u585e\uff0c\u5e76\u4e00\u76f4\u5904\u4e8e\u672a\u51b3\uff08pending\uff09\u72b6\u6001\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528sigpending\u51fd\u6570\u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684pending\u4fe1\u53f7\u96c6\u8fdb\u884c\u9a8c\u8bc1\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;signal.h&gt;\n\nvoid printPending(sigset_t *pending)\n{\n    int i = 1;\n    for (i = 1; i &lt;= 31; i++){\n        if (sigismember(pending, i)){\n            printf(\"1 \");\n        }\n        else{\n            printf(\"0 \");\n        }\n    }\n    printf(\"\\n\");\n}\nint main()\n{\n    sigset_t set, oset;\n    sigemptyset(&amp;set);\n    sigemptyset(&amp;oset);\n\n    sigaddset(&amp;set, 2); \/\/SIGINT\n    sigprocmask(SIG_SETMASK, &amp;set, &amp;oset); \/\/\u963b\u585e2\u53f7\u4fe1\u53f7\n\n    sigset_t pending;\n    sigemptyset(&amp;pending);\n\n    while (1){\n        sigpending(&amp;pending); \/\/\u83b7\u53d6pending\n        printPending(&amp;pending); \/\/\u6253\u5370pending\u4f4d\u56fe\uff081\u8868\u793a\u672a\u51b3\uff09\n        sleep(1);\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u7a0b\u5e8f\u521a\u521a\u8fd0\u884c\u65f6\uff0c\u56e0\u4e3a\u6ca1\u6709\u53d7\u5230\u4efb\u4f55\u4fe1\u53f7\uff0c\u6240\u4ee5\u6b64\u65f6\u8be5\u8fdb\u7a0b\u7684pending\u8868\u4e00\u76f4\u662f\u51680\uff0c\u800c\u5f53\u6211\u4eec\u4f7f\u7528kill\u547d\u4ee4\u5411\u8be5\u8fdb\u7a0b\u53d1\u90012\u53f7\u4fe1\u53f7\u540e\uff0c\u7531\u4e8e2\u53f7\u4fe1\u53f7\u662f\u963b\u585e\u7684\uff0c\u56e0\u6b642\u53f7\u4fe1\u53f7\u4e00\u76f4\u5904\u4e8e\u672a\u51b3\u72b6\u6001\uff0c\u6240\u4ee5\u6211\u4eec\u770b\u5230pending\u8868\u4e2d\u7684\u7b2c\u4e8c\u4e2a\u6570\u5b57\u4e00\u76f4\u662f1\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167949938247941.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167949938247941.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u4e3a\u4e86\u770b\u52302\u53f7\u4fe1\u53f7\u9012\u8fbe\u540epending\u8868\u7684\u53d8\u5316\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u6bb5\u65f6\u95f4\u540e\uff0c\u81ea\u52a8\u89e3\u96642\u53f7\u4fe1\u53f7\u7684\u963b\u585e\u72b6\u6001\uff0c\u89e3\u96642\u53f7\u4fe1\u53f7\u7684\u963b\u585e\u72b6\u6001\u540e2\u53f7\u4fe1\u53f7\u5c31\u4f1a\u7acb\u5373\u88ab\u9012\u8fbe\u3002\u56e0\u4e3a2\u53f7\u4fe1\u53f7\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\u662f\u7ec8\u6b62\u8fdb\u7a0b\uff0c\u6240\u4ee5\u4e3a\u4e86\u770b\u52302\u53f7\u4fe1\u53f7\u62b5\u8fbe\u540e\u7684pending\u8868\uff0c\u6211\u4eec\u53ef\u4ee5\u5c062\u53f7\u4fe1\u53f7\u8fdb\u884c\u6355\u6349\uff0c\u8ba92\u53f7\u4fe1\u53f7\u9012\u8fbe\u65f6\u6267\u884c\u6211\u4eec\u6240\u7ed9\u7684\u81ea\u5b9a\u4e49\u52a8\u4f5c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;signal.h&gt;\n\nvoid printPending(sigset_t *pending)\n{\n    int i = 1;\n    for (i = 1; i &lt;= 31; i++){\n        if (sigismember(pending, i)){\n            printf(\"1 \");\n        }\n        else{\n            printf(\"0 \");\n        }\n    }\n    printf(\"\\n\");\n}\nvoid handler(int signo)\n{\n    printf(\"handler signo:%d\\n\", signo);\n}\nint main()\n{\n    signal(2, handler);\n    sigset_t set, oset;\n    sigemptyset(&amp;set);\n    sigemptyset(&amp;oset);\n\n    sigaddset(&amp;set, 2); \/\/SIGINT\n    sigprocmask(SIG_SETMASK, &amp;set, &amp;oset); \/\/\u963b\u585e2\u53f7\u4fe1\u53f7\n\n    sigset_t pending;\n    sigemptyset(&amp;pending);\n\n    int count = 0;\n    while (1){\n        sigpending(&amp;pending); \/\/\u83b7\u53d6pending\n        printPending(&amp;pending); \/\/\u6253\u5370pending\u4f4d\u56fe\uff081\u8868\u793a\u672a\u51b3\uff09\n        sleep(1);\n        count++;\n        if (count == 20){\n            sigprocmask(SIG_SETMASK, &amp;oset, NULL); \/\/\u6062\u590d\u66fe\u7ecf\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\n            printf(\"\u6062\u590d\u4fe1\u53f7\u5c4f\u853d\u5b57\\n\");\n        }\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u6b64\u65f6\u5c31\u53ef\u4ee5\u770b\u5230\uff0c\u8fdb\u7a0b\u6536\u52302\u53f7\u4fe1\u53f7\u540e\uff0c\u8be5\u4fe1\u53f7\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u5904\u4e8e\u672a\u51b3\u72b6\u6001\uff0c\u5f53\u89e3\u96642\u53f7\u4fe1\u53f7\u7684\u5c4f\u853d\u540e\uff0c2\u53f7\u4fe1\u53f7\u5c31\u4f1a\u7acb\u5373\u9012\u8fbe\uff0c\u6267\u884c\u6211\u4eec\u6240\u7ed9\u7684\u81ea\u5b9a\u4e49\u52a8\u4f5c\uff0c\u800c\u6b64\u65f6\u7684pending\u8868\u4e5f\u53d8\u56de\u4e86\u51680\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167950056937444.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167950056937444.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p><strong>\u7ec6\u8282\uff1a<\/strong> \u5728\u89e3\u96642\u53f7\u4fe1\u53f7\u540e\uff0c2\u53f7\u4fe1\u53f7\u7684\u81ea\u5b9a\u4e49\u52a8\u4f5c\u662f\u5728\u6253\u5370&#8221;\u6062\u590d\u4fe1\u53f7\u5c4f\u853d\u5b57&#8221;\u4e4b\u524d\u6267\u884c\u7684\u3002\u56e0\u4e3a\u5982\u679c\u8c03\u7528sigprocmask\u89e3\u9664\u5bf9\u5f53\u524d\u82e5\u5e72\u4e2a\u672a\u51b3\u4fe1\u53f7\u7684\u963b\u585e\uff0c\u5219\u5728sigprocmask\u51fd\u6570\u8fd4\u56de\u524d\uff0c\u81f3\u5c11\u5c06\u5176\u4e2d\u4e00\u4e2a\u4fe1\u53f7\u9012\u8fbe\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6355\u6349\u4fe1\u53f7<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u5185\u6838\u7a7a\u95f4\u4e0e\u7528\u6237\u7a7a\u95f4<\/h3>\n\n\n\n<p>\u6bcf\u4e00\u4e2a\u8fdb\u7a0b\u90fd\u6709\u81ea\u5df1\u7684\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\uff0c\u8be5\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\u7531\u5185\u6838\u7a7a\u95f4\u548c\u7528\u6237\u7a7a\u95f4\u7ec4\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7528\u6237\u6240\u5199\u7684\u4ee3\u7801\u548c\u6570\u636e\u4f4d\u4e8e\u7528\u6237\u7a7a\u95f4\uff0c\u901a\u8fc7\u7528\u6237\u7ea7\u9875\u8868\u4e0e\u7269\u7406\u5185\u5b58\u4e4b\u95f4\u5efa\u7acb\u6620\u5c04\u5173\u7cfb\u3002<\/li>\n\n\n\n<li>\u5185\u6838\u7a7a\u95f4\u5b58\u50a8\u7684\u5b9e\u9645\u4e0a\u662f\u64cd\u4f5c\u7cfb\u7edf\u4ee3\u7801\u548c\u6570\u636e\uff0c\u901a\u8fc7\u5185\u6838\u7ea7\u9875\u8868\u4e0e\u7269\u7406\u5185\u5b58\u4e4b\u95f4\u5efa\u7acb\u6620\u5c04\u5173\u7cfb\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5185\u6838\u7ea7\u9875\u8868\u662f\u4e00\u4e2a\u5168\u5c40\u7684\u9875\u8868\uff0c\u5b83\u7528\u6765\u7ef4\u62a4\u64cd\u4f5c\u7cfb\u7edf\u7684\u4ee3\u7801\u548c\u8fdb\u7a0b\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u56e0\u6b64\uff0c\u5728\u6bcf\u4e2a\u8fdb\u7a0b\u7684\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\u4e2d\uff0c\u7528\u6237\u7a7a\u95f4\u662f\u5c5e\u4e8e\u5f53\u524d\u8fdb\u7a0b\u7684\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u770b\u5230\u7684\u4ee3\u7801\u548c\u6570\u636e\u662f\u5b8c\u5168\u4e0d\u540c\u7684\uff0c\u4f46\u5185\u6838\u7a7a\u95f4\u6240\u5b58\u653e\u7684\u90fd\u662f\u64cd\u4f5c\u7cfb\u7edf\u7684\u4ee3\u7801\u548c\u6570\u636e\uff0c\u6240\u6709\u8fdb\u7a0b\u770b\u5230\u7684\u90fd\u662f\u4e00\u6837\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u867d\u7136\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u80fd\u591f\u770b\u5230\u64cd\u4f5c\u7cfb\u7edf\uff0c\u4f46\u5e76\u4e0d\u610f\u5473\u7740\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u80fd\u591f\u968f\u65f6\u5bf9\u5176\u8fdb\u884c\u8bbf\u95ee\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5982\u4f55\u7406\u89e3\u8fdb\u7a0b\u5207\u6362\uff1f<\/p>\n<\/blockquote>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5728\u5f53\u524d\u8fdb\u7a0b\u7684\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\u4e2d\u7684\u5185\u6838\u7a7a\u95f4\uff0c\u627e\u5230\u64cd\u4f5c\u7cfb\u7edf\u7684\u4ee3\u7801\u548c\u6570\u636e\u3002<\/li>\n\n\n\n<li>\u6267\u884c\u64cd\u4f5c\u7cfb\u7edf\u7684\u4ee3\u7801\uff0c\u5c06\u5f53\u524d\u8fdb\u7a0b\u7684\u4ee3\u7801\u548c\u6570\u636e\u5265\u79bb\u4e0b\u6765\uff0c\u5e76\u6362\u4e0a\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u7684\u4ee3\u7801\u548c\u6570\u636e\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong> \u5f53\u4f60\u8bbf\u95ee\u7528\u6237\u7a7a\u95f4\u65f6\u4f60\u5fc5\u987b\u5904\u4e8e\u7528\u6237\u6001\uff0c\u5f53\u4f60\u8bbf\u95ee\u5185\u6838\u7a7a\u95f4\u65f6\u4f60\u5fc5\u987b\u5904\u4e8e\u5185\u6838\u6001\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5185\u6838\u6001\u4e0e\u7528\u6237\u6001<\/h3>\n\n\n\n<p>\u5185\u6838\u6001\u4e0e\u7528\u6237\u6001\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5185\u6838\u6001\u901a\u5e38\u7528\u6765\u6267\u884c\u64cd\u4f5c\u7cfb\u7edf\u7684\u4ee3\u7801\uff0c\u662f\u4e00\u79cd\u6743\u9650\u975e\u5e38\u9ad8\u7684\u72b6\u6001\u3002<\/li>\n\n\n\n<li>\u7528\u6237\u6001\u662f\u4e00\u79cd\u7528\u6765\u6267\u884c\u666e\u901a\u7528\u6237\u4ee3\u7801\u7684\u72b6\u6001\uff0c\u662f\u4e00\u79cd\u53d7\u76d1\u7ba1\u7684\u666e\u901a\u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fdb\u7a0b\u6536\u5230\u4fe1\u53f7\u4e4b\u540e\uff0c\u5e76\u4e0d\u662f\u7acb\u5373\u5904\u7406\u4fe1\u53f7\uff0c\u800c\u662f\u5728\u5408\u9002\u7684\u65f6\u5019\uff0c\u8fd9\u91cc\u6240\u8bf4\u7684\u5408\u9002\u7684\u65f6\u5019\u5b9e\u9645\u4e0a\u5c31\u662f\u6307\uff0c\u4ece\u5185\u6838\u6001\u5207\u6362\u56de\u7528\u6237\u6001\u7684\u65f6\u5019\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5185\u6838\u6001\u4e0e\u7528\u6237\u6001\u4e4b\u95f4\u662f\u5982\u4f55\u8fdb\u884c\u5207\u6362\u7684\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u4ece\u7528\u6237\u6001\u5207\u6362\u4e3a\u5185\u6838\u6001\u901a\u5e38\u6709\u5982\u4e0b\u51e0\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9700\u8981\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u65f6\u3002<\/li>\n\n\n\n<li>\u5f53\u524d\u8fdb\u7a0b\u7684\u65f6\u95f4\u7247\u5230\u4e86\uff0c\u5bfc\u81f4\u8fdb\u7a0b\u5207\u6362\u3002<\/li>\n\n\n\n<li>\u4ea7\u751f\u5f02\u5e38\u3001\u4e2d\u65ad\u3001\u9677\u9631\u7b49\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4e0e\u4e4b\u76f8\u5bf9\u5e94\uff0c\u4ece\u5185\u6838\u6001\u5207\u6362\u4e3a\u7528\u6237\u6001\u6709\u5982\u4e0b\u51e0\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7cfb\u7edf\u8c03\u7528\u8fd4\u56de\u65f6\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b\u5207\u6362\u5b8c\u6bd5\u3002<\/li>\n\n\n\n<li>\u5f02\u5e38\u3001\u4e2d\u65ad\u3001\u9677\u9631\u7b49\u5904\u7406\u5b8c\u6bd5\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u5176\u4e2d\uff0c\u7531\u7528\u6237\u6001\u5207\u6362\u4e3a\u5185\u6838\u6001\u6211\u4eec\u79f0\u4e4b\u4e3a\u9677\u5165\u5185\u6838\u3002\u6bcf\u5f53\u6211\u4eec\u9700\u8981\u9677\u5165\u5185\u6838\u7684\u65f6\u5019\uff0c\u672c\u8d28\u4e0a\u662f\u56e0\u4e3a\u6211\u4eec\u9700\u8981\u6267\u884c\u64cd\u4f5c\u7cfb\u7edf\u7684\u4ee3\u7801\uff0c\u6bd4\u5982\u7cfb\u7edf\u8c03\u7528\u51fd\u6570\u662f\u7531\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u73b0\u7684\uff0c\u6211\u4eec\u8981\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u5c31\u5fc5\u987b\u5148\u7531\u7528\u6237\u6001\u5207\u6362\u4e3a\u5185\u6838\u6001\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5185\u6838\u5982\u4f55\u5b9e\u73b0\u4fe1\u53f7\u7684\u6355\u6349<\/h3>\n\n\n\n<p>\u5f53\u6211\u4eec\u5728\u6267\u884c\u4e3b\u63a7\u5236\u6d41\u7a0b\u7684\u65f6\u5019\uff0c\u53ef\u80fd\u56e0\u4e3a\u67d0\u4e9b\u60c5\u51b5\u800c\u9677\u5165\u5185\u6838\uff0c\u5f53\u5185\u6838\u5904\u7406\u5b8c\u6bd5\u51c6\u5907\u8fd4\u56de\u7528\u6237\u6001\u65f6\uff0c\u5c31\u9700\u8981\u8fdb\u884c\u4fe1\u53f7pending\u7684\u68c0\u67e5\u3002\uff08\u6b64\u65f6\u4ecd\u5904\u4e8e\u5185\u6838\u6001\uff0c\u6709\u6743\u5229\u67e5\u770b\u5f53\u524d\u8fdb\u7a0b\u7684pending\u4f4d\u56fe\uff09\u3002<\/p>\n\n\n\n<p>\u5728\u67e5\u770bpending\u4f4d\u56fe\u65f6\uff0c\u5982\u679c\u53d1\u73b0\u6709\u672a\u51b3\u4fe1\u53f7\uff0c\u5e76\u4e14\u8be5\u4fe1\u53f7\u6ca1\u6709\u88ab\u963b\u585e\uff0c\u90a3\u4e48\u6b64\u65f6\u5c31\u9700\u8981\u8be5\u4fe1\u53f7\u8fdb\u884c\u5904\u7406\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u5f85\u5904\u7406\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u662f\u9ed8\u8ba4\u6216\u8005\u5ffd\u7565\uff0c\u5219\u6267\u884c\u8be5\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u540e\u6e05\u9664\u5bf9\u5e94\u7684pending\u6807\u5fd7\u4f4d\uff0c\u5982\u679c\u6ca1\u6709\u65b0\u7684\u4fe1\u53f7\u8981\u9012\u8fbe\uff0c\u5c31\u76f4\u63a5\u8fd4\u56de\u7528\u6237\u6001\uff0c\u4ece\u4e3b\u63a7\u5236\u6d41\u7a0b\u4e2d\u4e0a\u6b21\u88ab\u4e2d\u65ad\u7684\u5730\u65b9\u7ee7\u7eed\u5411\u4e0b\u6267\u884c\u5373\u53ef\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16795349270083.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16795349270083.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u4f46\u5982\u679c\u5f85\u5904\u7406\u4fe1\u53f7\u662f\u81ea\u5b9a\u4e49\u6355\u6349\u7684\uff0c\u5373\u8be5\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u662f\u7531\u7528\u6237\u63d0\u4f9b\u7684\uff0c\u90a3\u4e48\u5904\u7406\u8be5\u4fe1\u53f7\u65f6\u5c31\u9700\u8981\u5148\u8fd4\u56de\u7528\u6237\u6001\u6267\u884c\u5bf9\u5e94\u7684\u81ea\u5b9a\u4e49\u5904\u7406\u52a8\u4f5c\uff0c\u6267\u884c\u5b8c\u6210\u540e\u518d\u901a\u8fc7\u7279\u6b8a\u7684\u7cfb\u7edf\u8c03\u7528sigreturn\u518d\u6b21\u9677\u5165\u5185\u6838\u5e76\u6e05\u9664\u5bf9\u5e94\u7684pending\u6807\u5fd7\u4f4d\uff0c\u5982\u679c\u6ca1\u6709\u65b0\u7684\u4fe1\u53f7\u8981\u62b5\u8fbe\uff0c\u5c31\u76f4\u63a5\u8fd4\u56de\u7528\u6237\u6001\uff0c\u7ee7\u7eed\u6267\u884c\u4e3b\u63a7\u5236\u6d41\u7a0b\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16795353468806.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16795353468806.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong> sighandler\u548cmain\u51fd\u6570\u4f7f\u7528\u4e0d\u540c\u7684\u5806\u6808\u7a7a\u95f4\uff0c\u5b83\u4eec\u4e4b\u95f4\u4e0d\u5b58\u5728\u8c03\u7528\u548c\u88ab\u8c03\u7528\u7684\u5173\u7cfb\uff0c\u662f\u4e24\u4e2a\u72ec\u7acb\u7684\u63a7\u5236\u6d41\u7a0b\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5de7\u8bb0<\/p>\n<\/blockquote>\n\n\n\n<p>\u5f53\u4ee3\u5904\u7406\u4fe1\u53f7\u662f\u81ea\u5b9a\u4e49\u6355\u6349\u65f6\u7684\u60c5\u51b5\u6bd4\u8f83\u590d\u6742\uff0c\u53ef\u4ee5\u501f\u52a9\u4e0b\u56fe\u8fdb\u884c\u8bb0\u5fc6\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16795355950659.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-16795355950659.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u5176\u4e2d\uff0c\u8be5\u56fe\u5f62\u4e0e\u76f4\u7ebf\u6709\u51e0\u4e2a\u4ea4\u70b9\u5c31\u4ee3\u8868\u5728\u8fd9\u671f\u95f4\u6709\u51e0\u6b21\u72b6\u6001\u5207\u6362\uff0c\u800c\u7bad\u5934\u7684\u65b9\u5411\u5c31\u4ee3\u8868\u7740\u6b64\u5904\u72b6\u6001\u5207\u6362\u7684\u65b9\u5411\uff0c\u56fe\u5f62\u4e2d\u7684\u5706\u70b9\u5c31\u4ee3\u8868\u7740\u68c0\u67e5pending\u8868\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5f53\u8bc6\u522b\u5230\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u662f\u81ea\u5b9a\u4e49\u65f6\uff0c\u80fd\u76f4\u63a5\u5728\u5185\u6838\u6001\u6267\u884c\u7528\u6237\u7a7a\u95f4\u7684\u4ee3\u7801\u5417\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u7406\u8bba\u4e0a\u6765\u8bf4\u662f\u53ef\u4ee5\u7684\uff0c\u56e0\u4e3a\u5185\u6838\u6001\u662f\u4e00\u79cd\u6743\u9650\u975e\u5e38\u9ad8\u7684\u72b6\u6001\uff0c\u4f46\u662f\u7edd\u5bf9\u4e0d\u80fd\u8fd9\u6837\u8bbe\u8ba1\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u5141\u8bb8\u5728\u5185\u6838\u6001\u76f4\u63a5\u6267\u884c\u7528\u6237\u7a7a\u95f4\u7684\u4ee3\u7801\uff0c\u90a3\u4e48\u7528\u6237\u5c31\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u8bbe\u8ba1\u4e00\u4e9b\u975e\u6cd5\u64cd\u4f5c\uff0c\u6bd4\u5982\u6e05\u7a7a\u6570\u636e\u5e93\u7b49\uff0c\u867d\u7136\u5728\u7528\u6237\u6001\u65f6\u6ca1\u6709\u8db3\u591f\u7684\u6743\u9650\u505a\u5230\u6e05\u7a7a\u6570\u636e\u5e93\uff0c\u4f46\u662f\u5982\u679c\u662f\u5728\u5185\u6838\u6001\u65f6\u6267\u884c\u4e86\u8fd9\u79cd\u975e\u6cd5\u4ee3\u7801\uff0c\u90a3\u4e48\u6570\u636e\u5e93\u5c31\u771f\u7684\u88ab\u6e05\u7a7a\u4e86\uff0c\u56e0\u4e3a\u5185\u6838\u6001\u662f\u6709\u8db3\u591f\u6743\u9650\u6e05\u7a7a\u6570\u636e\u5e93\u7684\u3002<\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e0d\u80fd\u8ba9\u64cd\u4f5c\u7cfb\u7edf\u76f4\u63a5\u53bb\u6267\u884c\u7528\u6237\u7684\u4ee3\u7801\uff0c\u56e0\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u65e0\u6cd5\u4fdd\u8bc1\u7528\u6237\u7684\u4ee3\u7801\u662f\u5408\u6cd5\u4ee3\u7801\uff0c\u5373\u64cd\u4f5c\u7cfb\u7edf\u4e0d\u4fe1\u4efb\u4efb\u4f55\u7528\u6237\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">sigaction<\/h3>\n\n\n\n<p>\u6355\u6349\u4fe1\u53f7\u9664\u4e86\u7528\u524d\u9762\u7684signal\u51fd\u6570\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528sigaction\u51fd\u6570\u5bf9\u4fe1\u53f7\u8fdb\u884c\u6355\u6349\uff0csigaction\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int sigaction(int signum, const struct sigaction* act, struct sigaction* oldact);<\/code><\/pre>\n\n\n\n<p>sigaction\u51fd\u6570\u53ef\u4ee5\u8bfb\u53d6\u548c\u4fee\u6539\u4e0e\u6307\u5b9a\u4fe1\u53f7\u76f8\u5173\u8054\u7684\u5904\u7406\u52a8\u4f5c\uff0c\u8be5\u51fd\u6570\u8c03\u7528\u6210\u529f\u8fd4\u56de0\uff0c\u51fa\u9519\u8fd4\u56de-1\u3002<\/p>\n\n\n\n<p><strong>\u53c2\u6570\u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>signum\u4ee3\u8868\u6307\u5b9a\u4fe1\u53f7\u7684\u7f16\u53f7\u3002<\/li>\n\n\n\n<li>\u82e5act\u6307\u9488\u975e\u7a7a\uff0c\u5219\u6839\u636eact\u4fee\u6539\u8be5\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u3002<\/li>\n\n\n\n<li>\u82e5oldact\u6307\u9488\u975e\u7a7a\uff0c\u5219\u6839\u636eoldact\u4f20\u51fa\u8be5\u4fe1\u53f7\u539f\u6765\u7684\u5904\u7406\u52a8\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5176\u4e2d\uff0c\u53c2\u6570act\u548coldact\u90fd\u662f\u7ed3\u6784\u4f53\u6307\u9488\u53d8\u91cf\uff0c\u8be5\u7ed3\u6784\u4f53\u7684\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>struct sigaction {\n    void(*sa_handler)(int);\n    void(*sa_sigaction)(int, siginfo_t *, void *);\n    sigset_t   sa_mask;\n    int        sa_flags;\n    void(*sa_restorer)(void);\n};<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7ed3\u6784\u4f53\u7684\u7b2c\u4e00\u4e2a\u6210\u5458sa_handler\uff1a<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c06sa_handler\u8d4b\u503c\u4e3a\u5e38\u6570SIG_IGN\u4f20\u7ed9sigaction\u51fd\u6570\uff0c\u8868\u793a\u5ffd\u7565\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>\u5c06sa_handler\u8d4b\u503c\u4e3a\u5e38\u6570SIG_DFL\u4f20\u7ed9sigaction\u51fd\u6570\uff0c\u8868\u793a\u6267\u884c\u7cfb\u7edf\u9ed8\u8ba4\u52a8\u4f5c\u3002<\/li>\n\n\n\n<li>\u5c06sa_handler\u8d4b\u503c\u4e3a\u4e00\u4e2a\u51fd\u6570\u6307\u9488\uff0c\u8868\u793a\u7528\u81ea\u5b9a\u4e49\u51fd\u6570\u6355\u6349\u4fe1\u53f7\uff0c\u6216\u8005\u8bf4\u5411\u5185\u6838\u6ce8\u518c\u4e86\u4e00\u4e2a\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong> \u6240\u6ce8\u518c\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u7684\u8fd4\u56de\u503c\u4e3avoid\uff0c\u53c2\u6570\u4e3aint\uff0c\u901a\u8fc7\u53c2\u6570\u53ef\u4ee5\u5f97\u77e5\u5f53\u524d\u4fe1\u53f7\u7684\u7f16\u53f7\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u7528\u540c\u4e00\u4e2a\u51fd\u6570\u5904\u7406\u591a\u79cd\u4fe1\u53f7\u3002\u663e\u7136\u8fd9\u662f\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\uff0c\u4e0d\u662f\u88abmain\u51fd\u6570\u8c03\u7528\uff0c\u800c\u662f\u88ab\u7cfb\u7edf\u6240\u8c03\u7528\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7ed3\u6784\u4f53\u7684\u7b2c\u4e8c\u4e2a\u6210\u5458sa_sigaction\uff1a<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>sa_sigaction\u662f\u5b9e\u65f6\u4fe1\u53f7\u5904\u7406\u7684\u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7ed3\u6784\u4f53\u7684\u7b2c\u4e09\u4e2a\u6210\u5458sa_mask\uff1a<\/p>\n<\/blockquote>\n\n\n\n<p>\u9996\u5148\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u5f53\u67d0\u4e2a\u4fe1\u53f7\u7684\u5904\u7406\u51fd\u6570\u88ab\u8c03\u7528\uff0c\u5185\u6838\u81ea\u52a8\u5c06\u5f53\u524d\u4fe1\u53f7\u52a0\u5165\u8fdb\u7a0b\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\uff0c\u5f53\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u8fd4\u56de\u65f6\u81ea\u52a8\u6062\u590d\u539f\u6765\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\uff0c\u8fd9\u6837\u5c31\u4fdd\u8bc1\u4e86\u5728\u5904\u7406\u67d0\u4e2a\u4fe1\u53f7\u65f6\uff0c\u5982\u679c\u8fd9\u79cd\u4fe1\u53f7\u518d\u6b21\u4ea7\u751f\uff0c\u90a3\u4e48\u5b83\u4f1a\u88ab\u963b\u585e\u5230\u5f53\u524d\u5904\u7406\u7ed3\u675f\u4e3a\u6b62\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u5728\u8c03\u7528\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u65f6\uff0c\u9664\u4e86\u5f53\u524d\u4fe1\u53f7\u88ab\u81ea\u52a8\u5c4f\u853d\u5916\uff0c\u8fd8\u5e0c\u671b\u81ea\u52a8\u5c4f\u853d\u53e6\u5916\u4e00\u4e9b\u4fe1\u606f\uff0c\u5219\u7528sa_mask\u5b57\u6bb5\u8bf4\u660e\u8fd9\u4e9b\u9700\u8981\u989d\u5916\u5c4f\u853d\u7684\u4fe1\u53f7\uff0c\u5f53\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u8fd4\u56de\u65f6\uff0c\u81ea\u52a8\u6062\u590d\u539f\u6765\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7ed3\u6784\u4f53\u7684\u7b2c\u56db\u4e2a\u6210\u5458sa_flags\uff1a<\/p>\n<\/blockquote>\n\n\n\n<p>sa_flags\u5b57\u6bb5\u5305\u542b\u4e00\u4e9b\u9009\u9879\uff0c\u8fd9\u91cc\u76f4\u63a5\u5c06sa_flags\u8bbe\u7f6e\u4e3a0\u5373\u53ef\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7ed3\u6784\u4f53\u7684\u7b2c\u4e94\u4e2a\u6210\u5458sa_restorer:<\/p>\n<\/blockquote>\n\n\n\n<p>\u8be5\u53c2\u6570\u6ca1\u6709\u4f7f\u7528\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e0b\u9762\u6211\u4eec\u7528sigaction\u51fd\u6570\u5bf92\u53f7\u4fe1\u53f7\u8fdb\u884c\u4e86\u6355\u6349\uff0c\u5c062\u53f7\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u6539\u4e3a\u4e86\u81ea\u5b9a\u4e49\u7684\u6253\u5370\u52a8\u4f5c\uff0c\u5e76\u5728\u6267\u884c\u4e00\u6b21\u81ea\u5b9a\u4e49\u52a8\u4f5c\u540e\u5c062\u53f7\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u6062\u590d\u4e3a\u539f\u6765\u7684\u9ed8\u8ba4\u52a8\u4f5c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;string.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;signal.h&gt;\n\nstruct sigaction act, oact;\nvoid handler(int signo)\n{\n    printf(\"get a signal:%d\\n\", signo);\n    sigaction(2, &amp;oact, NULL);\n}\nint main()\n{\n    memset(&amp;act, 0, sizeof(act));\n    memset(&amp;oact, 0, sizeof(oact));\n\n    act.sa_handler = handler;\n    act.sa_flags = 0;\n    sigemptyset(&amp;act.sa_mask);\n\n    sigaction(2, &amp;act, &amp;oact);\n    while (1){\n        printf(\"I am a process...\\n\");\n        sleep(1);\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u4ee3\u7801\u540e\uff0c\u7b2c\u4e00\u6b21\u5411\u8fdb\u7a0b\u53d1\u90012\u53f7\u4fe1\u53f7\uff0c\u6267\u884c\u6211\u4eec\u81ea\u5b9a\u4e49\u7684\u6253\u5370\u52a8\u4f5c\uff0c\u5f53\u6211\u4eec\u518d\u6b21\u5411\u8fdb\u7a0b\u53d1\u90012\u53f7\u4fe1\u53f7\uff0c\u5c31\u6267\u884c\u8be5\u4fe1\u53f7\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\u4e86\uff0c\u5373\u7ec8\u6b62\u8fdb\u7a0b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956233319612.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956233319612.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u53ef\u91cd\u5165\u51fd\u6570<\/h2>\n\n\n\n<p>\u4e0b\u9762\u4e3b\u51fd\u6570\u4e2d\u8c03\u7528insert\u51fd\u6570\u5411\u94fe\u8868\u4e2d\u63d2\u5165\u7ed3\u70b9node1\uff0c\u67d0\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u4e2d\u4e5f\u8c03\u7528\u4e86insert\u51fd\u6570\u5411\u94fe\u8868\u4e2d\u63d2\u5165\u7ed3\u70b9node2\uff0c\u4e4d\u773c\u4e00\u770b\u597d\u50cf\u6ca1\u6709\u4ec0\u4e48\u95ee\u9898\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956278090718.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956278090718.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u4e0b\u9762\u6211\u4eec\u6765\u5206\u6790\u4e00\u4e0b\uff0c\u5bf9\u4e8e\u4e0b\u9762\u8fd9\u4e2a\u94fe\u8868\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/ccaeaefcf4d741aaab2bc0746409e8da.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/ccaeaefcf4d741aaab2bc0746409e8da.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9996\u5148\uff0cmain\u51fd\u6570\u4e2d\u8c03\u7528\u4e86insert\u51fd\u6570\uff0c\u60f3\u5c06\u7ed3\u70b9node1\u63d2\u5165\u94fe\u8868\uff0c\u4f46\u63d2\u5165\u64cd\u4f5c\u5206\u4e3a\u4e24\u6b65\uff0c\u521a\u505a\u5b8c\u7b2c\u4e00\u6b65\u7684\u65f6\u5019\uff0c\u56e0\u4e3a\u786c\u4ef6\u4e2d\u65ad\u4f7f\u8fdb\u7a0b\u5207\u6362\u5230\u5185\u6838\uff0c\u518d\u6b21\u56de\u5230\u7528\u6237\u6001\u4e4b\u524d\u68c0\u67e5\u5230\u6709\u4fe1\u53f7\u5f85\u5904\u7406\uff0c\u4e8e\u662f\u5207\u6362\u5230sighandler\u51fd\u6570\u3002 <img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/159a5ef2f1024024afd1279010e08b2b.png\" alt=\"img\"><\/li>\n\n\n\n<li>\u800csighandler\u51fd\u6570\u4e2d\u4e5f\u8c03\u7528\u4e86insert\u51fd\u6570\uff0c\u5c06\u7ed3\u70b9node2\u63d2\u5165\u5230\u94fe\u8868\u4e2d\uff0c\u63d2\u5165\u64cd\u4f5c\u5b8c\u6210\u7b2c\u4e00\u6b65\u7684\u60c5\u51b5\u5982\u4e0b\uff1a <img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956339834825.png\" alt=\"img\"><\/li>\n\n\n\n<li>\u5f53\u7ed3\u70b9node2\u63d2\u5165\u7684\u4e24\u6b65\u64cd\u4f5c\u90fd\u505a\u5b8c\u4e4b\u540e\u4ecesighandler\u8fd4\u56de\u5185\u6838\u6001\uff0c\u6b64\u65f6\u7684\u94fe\u8868\u5e03\u5c40\u5982\u4e0b\uff1a <img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956353013031.png\" alt=\"img\"><\/li>\n\n\n\n<li>\u518d\u6b21\u56de\u5230\u7528\u6237\u6001\u5c31\u4ecemain\u51fd\u6570\u8c03\u7528\u7684insert\u51fd\u6570\u4e2d\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\uff0c\u5373\u7ee7\u7eed\u8fdb\u884c\u7ed3\u70b9node1\u7684\u63d2\u5165\u64cd\u4f5c\u3002 <img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956379549734.png\" alt=\"img\"><\/li>\n<\/ol>\n\n\n\n<p>\u6700\u7ec8\u7ed3\u679c\u662f\uff0cmain\u51fd\u6570\u548csighandler\u51fd\u6570\u5148\u540e\u5411\u94fe\u8868\u4e2d\u63d2\u5165\u4e86\u4e24\u4e2a\u7ed3\u70b9\uff0c\u4f46\u6700\u540e\u53ea\u6709node1\u7ed3\u70b9\u771f\u6b63\u63d2\u5165\u5230\u4e86\u94fe\u8868\u5f53\u4e2d\uff0c\u800cnode2\u7ed3\u70b9\u5c31\u518d\u4e5f\u627e\u4e0d\u5230\u4e86\uff0c\u9020\u6210\u4e86\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n\n\n\n<p>\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0c\u5404\u51fd\u6570\u6267\u884c\u7684\u5148\u540e\u987a\u5e8f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956404944339.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956404944339.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u50cf\u4e0a\u4f8b\u8fd9\u6837\uff0cinsert\u51fd\u6570\u88ab\u4e0d\u540c\u7684\u63a7\u5236\u6d41\u8c03\u7528\uff08main\u51fd\u6570\u548csighandler\u51fd\u6570\u4f7f\u7528\u4e0d\u540c\u7684\u5806\u6808\u7a7a\u95f4\uff0c\u5b83\u4eec\u4e4b\u95f4\u4e0d\u5b58\u5728\u8c03\u7528\u4e0e\u88ab\u8c03\u7528\u7684\u5173\u7cfb\uff0c\u662f\u4e24\u4e2a\u72ec\u7acb\u7684\u63a7\u5236\u6d41\u7a0b\uff09\uff0c\u6709\u53ef\u80fd\u5728\u7b2c\u4e00\u6b21\u8c03\u7528\u8fd8\u6ca1\u6709\u8fd4\u56de\u65f6\u5c31\u518d\u6b21\u8fdb\u5165\u8be5\u51fd\u6570\uff0c\u6211\u4eec\u5c06\u8fd9\u79cd\u73b0\u8c61\u79f0\u4e4b\u4e3a\u91cd\u5165\u3002<\/p>\n\n\n\n<p>\u800cinsert\u51fd\u6570\u8bbf\u95ee\u4e00\u4e2a\u5168\u5c40\u94fe\u8868\uff0c\u6709\u53ef\u80fd\u56e0\u4e3a\u91cd\u5165\u800c\u9020\u6210\u9519\u4e71\uff0c\u50cf\u8fd9\u6837\u7684\u51fd\u6570\u6211\u4eec\u79f0\u4e4b\u4e3a\u4e0d\u53ef\u91cd\u5165\u51fd\u6570\uff0c\u53cd\u4e4b\uff0c\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u53ea\u8bbf\u95ee\u81ea\u5df1\u7684\u5c40\u90e8\u53d8\u91cf\u6216\u53c2\u6570\uff0c\u5219\u79f0\u4e4b\u4e3a\u53ef\u91cd\u5165\uff08Reentrant\uff09\u51fd\u6570\u3002<\/p>\n\n\n\n<p><strong>\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u7b26\u5408\u4ee5\u4e0b\u6761\u4ef6\u4e4b\u4e00\u5219\u662f\u4e0d\u53ef\u91cd\u5165\u7684\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8c03\u7528\u4e86malloc\u6216free\uff0c\u56e0\u4e3amalloc\u4e5f\u662f\u7528\u5168\u5c40\u94fe\u8868\u6765\u7ba1\u7406\u5806\u7684\u3002<\/li>\n\n\n\n<li>\u8c03\u7528\u4e86\u6807\u5fd7I\/O\u5e93\u51fd\u6570\uff0c\u56e0\u4e3a\u6807\u51c6I\/O\u5e93\u7684\u5f88\u591a\u5b9e\u73b0\u90fd\u4ee5\u4e0d\u53ef\u91cd\u5165\u7684\u65b9\u5f0f\u4f7f\u7528\u5168\u5c40\u6570\u636e\u7ed3\u6784\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">volatile<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>volatile\u662fC\u8bed\u8a00\u7684\u4e00\u4e2a\u5173\u952e\u5b57\uff0c\u8be5\u5173\u952e\u5b57\u7684\u4f5c\u7528\u662f\u4fdd\u6301\u5185\u5b58\u7684\u53ef\u89c1\u6027\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>\u5728\u4e0b\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5bf92\u53f7\u4fe1\u53f7\u8fdb\u884c\u4e86\u6355\u6349\uff0c\u5f53\u8be5\u8fdb\u7a0b\u6536\u52302\u53f7\u4fe1\u53f7\u65f6\u4f1a\u5c06\u5168\u5c40\u53d8\u91cfflag\u75310\u7f6e1\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u8fdb\u7a0b\u6536\u52302\u53f7\u4fe1\u53f7\u4e4b\u524d\uff0c\u8be5\u8fdb\u7a0b\u4f1a\u4e00\u76f4\u5904\u4e8e\u6b7b\u5faa\u73af\u72b6\u6001\uff0c\u76f4\u5230\u6536\u52302\u53f7\u4fe1\u53f7\u65f6\u5c06flag\u7f6e1\u624d\u80fd\u591f\u6b63\u5e38\u9000\u51fa\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;signal.h&gt;\n\nint flag = 0;\n\nvoid handler(int signo)\n{\n    printf(\"get a signal:%d\\n\", signo);\n    flag = 1;\n}\nint main()\n{\n    signal(2, handler);\n    while (!flag);\n    printf(\"Proc Normal Quit!\\n\");\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956493438142.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956493438142.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u8be5\u7a0b\u5e8f\u7684\u8fd0\u884c\u8fc7\u7a0b\u597d\u50cf\u90fd\u5728\u6211\u4eec\u7684\u610f\u6599\u4e4b\u4e2d\uff0c\u4f46\u5b9e\u9645\u5e76\u975e\u5982\u6b64\u3002\u4ee3\u7801\u4e2d\u7684main\u51fd\u6570\u548chandler\u51fd\u6570\u662f\u4e24\u4e2a\u72ec\u7acb\u7684\u6267\u884c\u6d41\uff0c\u800cwhile\u5faa\u73af\u662f\u5728main\u51fd\u6570\u5f53\u4e2d\u7684\uff0c\u5728\u7f16\u8bd1\u5668\u7f16\u8bd1\u65f6\u53ea\u80fd\u68c0\u6d4b\u5230\u5728main\u51fd\u6570\u4e2d\u5bf9flag\u53d8\u91cf\u7684\u4f7f\u7528\u3002<\/p>\n\n\n\n<p>\u6b64\u65f6\u7f16\u8bd1\u5668\u68c0\u6d4b\u5230\u5728main\u51fd\u6570\u4e2d\u5e76\u6ca1\u6709\u5bf9flag\u53d8\u91cf\u505a\u4fee\u6539\u64cd\u4f5c\uff0c\u5728\u7f16\u8bd1\u5668\u4f18\u5316\u7ea7\u522b\u8f83\u9ad8\u7684\u65f6\u5019\uff0c\u5c31\u6709\u53ef\u80fd\u5c06flag\u8bbe\u7f6e\u8fdb\u5bc4\u5b58\u5668\u91cc\u9762\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956524693245.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956524693245.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u6b64\u65f6main\u51fd\u6570\u5728\u68c0\u6d4bflag\u65f6\u53ea\u68c0\u6d4b\u5bc4\u5b58\u5668\u91cc\u9762\u7684\u503c\uff0c\u800chandler\u6267\u884c\u6d41\u53ea\u662f\u5c06\u5185\u5b58\u4e2dflag\u7684\u503c\u7f6e\u4e3a1\u4e86\uff0c\u90a3\u4e48\u6b64\u65f6\u5c31\u7b97\u8fdb\u7a0b\u6536\u52302\u53f7\u4fe1\u53f7\u4e5f\u4e0d\u4f1a\u8df3\u51fa\u6b7b\u5faa\u73af\u3002<\/p>\n\n\n\n<p>\u5728\u7f16\u8bd1\u4ee3\u7801\u65f6\u643a\u5e26<code>-O3<\/code>\u9009\u9879\u4f7f\u5f97\u7f16\u8bd1\u5668\u7684\u4f18\u5316\u7ea7\u522b\u6700\u9ad8\uff0c\u6b64\u65f6\u518d\u8fd0\u884c\u8be5\u4ee3\u7801\uff0c\u5c31\u7b97\u5411\u8fdb\u7a0b\u53d1\u751f2\u53f7\u4fe1\u53f7\uff0c\u8be5\u8fdb\u7a0b\u4e5f\u4e0d\u4f1a\u7ec8\u6b62\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956528317248.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956528317248.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u9762\u5bf9\u8fd9\u79cd\u60c5\u51b5\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528volatile\u5173\u952e\u5b57\u5bf9flag\u53d8\u91cf\u8fdb\u884c\u4fee\u9970\uff0c\u544a\u77e5\u7f16\u8bd1\u5668\uff0c\u5bf9flag\u53d8\u91cf\u7684\u4efb\u4f55\u64cd\u4f5c\u90fd\u5fc5\u987b\u771f\u5b9e\u7684\u5728\u5185\u5b58\u4e2d\u8fdb\u884c\uff0c\u5373\u4fdd\u6301\u4e86\u5185\u5b58\u7684\u53ef\u89c1\u6027\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;signal.h&gt;\n\nvolatile int flag = 0;\n\nvoid handler(int signo)\n{\n    printf(\"get a signal:%d\\n\", signo);\n    flag = 1;\n}\nint main()\n{\n    signal(2, handler);\n    while (!flag);\n    printf(\"Proc Normal Quit!\\n\");\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u6b64\u65f6\u5c31\u7b97\u6211\u4eec\u7f16\u8bd1\u4ee3\u7801\u65f6\u643a\u5e26<code>-O3<\/code>\u9009\u9879\uff0c\u5f53\u8fdb\u7a0b\u6536\u52302\u53f7\u4fe1\u53f7\u5c06\u5185\u5b58\u4e2d\u7684flag\u53d8\u91cf\u7f6e1\u65f6\uff0cmain\u51fd\u6570\u6267\u884c\u6d41\u4e5f\u80fd\u591f\u68c0\u6d4b\u5230\u5185\u5b58\u4e2dflag\u53d8\u91cf\u7684\u53d8\u5316\uff0c\u8fdb\u800c\u8df3\u51fa\u6b7b\u5faa\u73af\u6b63\u5e38\u9000\u51fa\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956535431451.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167956535431451.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">SIGCHLD\u4fe1\u53f7<\/h2>\n\n\n\n<p>\u4e3a\u4e86\u907f\u514d\u51fa\u73b0\u50f5\u5c38\u8fdb\u7a0b\uff0c\u7236\u8fdb\u7a0b\u9700\u8981\u4f7f\u7528wait\u6216waitpid\u51fd\u6570\u7b49\u5f85\u5b50\u8fdb\u7a0b\u7ed3\u675f\uff0c\u7236\u8fdb\u7a0b\u53ef\u4ee5\u963b\u585e\u7b49\u5f85\u5b50\u8fdb\u7a0b\u7ed3\u675f\uff0c\u4e5f\u53ef\u4ee5\u975e\u963b\u585e\u5730\u67e5\u8be2\u662f\u5426\u6709\u5b50\u8fdb\u7a0b\u7ed3\u675f\u7b49\u5f85\u6e05\u7406\uff0c\u5373\u8f6e\u8be2\u7684\u65b9\u5f0f\u3002\u91c7\u7528\u7b2c\u4e00\u79cd\u65b9\u5f0f\uff0c\u7236\u8fdb\u7a0b\u963b\u585e\u5c31\u4e0d\u80fd\u5904\u7406\u81ea\u5df1\u7684\u5de5\u4f5c\u4e86\uff1b\u91c7\u7528\u7b2c\u4e8c\u79cd\u65b9\u5f0f\uff0c\u7236\u8fdb\u7a0b\u5728\u5904\u7406\u81ea\u5df1\u7684\u5de5\u4f5c\u7684\u540c\u65f6\u8fd8\u8981\u8bb0\u5f97\u65f6\u4e0d\u65f6\u5730\u8f6e\u8be2\u4e00\u4e0b\uff0c\u7a0b\u5e8f\u5b9e\u73b0\u590d\u6742\u3002<\/p>\n\n\n\n<p>\u5176\u5b9e\uff0c\u5b50\u8fdb\u7a0b\u5728\u7ec8\u6b62\u65f6\u4f1a\u7ed9\u7236\u8fdb\u7a0b\u53d1\u9001SIGCHLD\u4fe1\u53f7\uff0c\u8be5\u4fe1\u53f7\u7684\u9ed8\u8ba4\u52a8\u4f5c\u662f\u5ffd\u7565\uff0c\u7236\u8fdb\u7a0b\u53ef\u4ee5\u81ea\u5b9a\u4e49SIGCHLD\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\uff0c\u8fd9\u6837\u7236\u8fdb\u7a0b\u5c31\u53ea\u9700\u8981\u4e13\u5fc3\u5904\u7406\u81ea\u5df1\u7684\u5de5\u4f5c\uff0c\u4e0d\u5fc5\u5173\u5fc3\u5b50\u8fdb\u7a0b\u4e86\uff0c\u5b50\u8fdb\u7a0b\u7ec8\u6b62\u65f6\u4f1a\u901a\u77e5\u7236\u8fdb\u7a0b\uff0c\u7236\u8fdb\u7a0b\u5728\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u4e2d\u8c03\u7528wait\u6216waitpid\u51fd\u6570\u6e05\u7406\u5b50\u8fdb\u7a0b\u5373\u53ef\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4e2d\u5bf9SIGCHLD\u4fe1\u53f7\u8fdb\u884c\u4e86\u6355\u6349\uff0c\u5e76\u5c06\u5728\u8be5\u4fe1\u53f7\u7684\u5904\u7406\u51fd\u6570\u4e2d\u8c03\u7528\u4e86waitpid\u51fd\u6570\u5bf9\u5b50\u8fdb\u7a0b\u8fdb\u884c\u4e86\u6e05\u7406\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;signal.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;sys\/wait.h&gt;\n\nvoid handler(int signo)\n{\n    printf(\"get a signal: %d\\n\", signo);\n    int ret = 0;\n    while ((ret = waitpid(-1, NULL, WNOHANG)) &gt; 0){\n        printf(\"wait child %d success\\n\", ret);\n    }\n}\nint main()\n{\n    signal(SIGCHLD, handler);\n    if (fork() == 0){\n        \/\/child\n        printf(\"child is running, begin dead: %d\\n\", getpid());\n        sleep(3);\n        exit(1);\n    }\n    \/\/father\n    while (1);\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>SIGCHLD\u5c5e\u4e8e\u666e\u901a\u4fe1\u53f7\uff0c\u8bb0\u5f55\u8be5\u4fe1\u53f7\u7684pending\u4f4d\u53ea\u6709\u4e00\u4e2a\uff0c\u5982\u679c\u5728\u540c\u4e00\u65f6\u523b\u6709\u591a\u4e2a\u5b50\u8fdb\u7a0b\u540c\u65f6\u9000\u51fa\uff0c\u90a3\u4e48\u5728handler\u51fd\u6570\u5f53\u4e2d\u5b9e\u9645\u4e0a\u53ea\u6e05\u7406\u4e86\u4e00\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u56e0\u6b64\u5728\u4f7f\u7528waitpid\u51fd\u6570\u6e05\u7406\u5b50\u8fdb\u7a0b\u65f6\u9700\u8981\u4f7f\u7528while\u4e0d\u65ad\u8fdb\u884c\u6e05\u7406\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528waitpid\u51fd\u6570\u65f6\uff0c\u9700\u8981\u8bbe\u7f6e<code>WNOHANG<\/code>\u9009\u9879\uff0c\u5373\u975e\u963b\u585e\u5f0f\u7b49\u5f85\uff0c\u5426\u5219\u5f53\u6240\u6709\u5b50\u8fdb\u7a0b\u6e05\u7406\u5b8c\u6bd5\u65f6\uff0c\u7531\u4e8ewhile\u5faa\u73af\uff0c\u4f1a\u518d\u6b21\u8c03\u7528waitpid\u51fd\u6570\uff0c\u6b64\u65f6\u5c31\u4f1a\u5728\u8fd9\u91cc\u963b\u585e\u4f4f\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u6b64\u65f6\u7236\u8fdb\u7a0b\u5c31\u53ea\u9700\u4e13\u5fc3\u5904\u7406\u81ea\u5df1\u7684\u5de5\u4f5c\uff0c\u4e0d\u5fc5\u5173\u5fc3\u5b50\u8fdb\u7a0b\u4e86\uff0c\u5b50\u8fdb\u7a0b\u7ec8\u6b62\u65f6\u7236\u8fdb\u7a0b\u6536\u5230SIGCHLD\u4fe1\u53f7\uff0c\u4f1a\u81ea\u52a8\u8fdb\u884c\u8be5\u4fe1\u53f7\u7684\u81ea\u5b9a\u4e49\u5904\u7406\u52a8\u4f5c\uff0c\u8fdb\u800c\u5bf9\u5b50\u8fdb\u7a0b\u8fdb\u884c\u6e05\u7406\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167957058485254.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167957058485254.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n\n\n\n<p>\u4e8b\u5b9e\u4e0a\uff0c\u7531\u4e8eUNIX\u7684\u5386\u53f2\u539f\u56e0\uff0c\u8981\u60f3\u4e0d\u4ea7\u751f\u50f5\u5c38\u8fdb\u7a0b\u8fd8\u6709\u53e6\u5916\u4e00\u79cd\u65b9\u6cd5\uff1a\u7236\u8fdb\u7a0b\u8c03\u7528signal\u6216sigaction\u51fd\u6570\u5c06SIGCHLD\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u8bbe\u7f6e\u4e3aSIG_IGN\uff0c\u8fd9\u6837fork\u51fa\u6765\u7684\u5b50\u8fdb\u7a0b\u5728\u7ec8\u6b62\u65f6\u4f1a\u81ea\u52a8\u6e05\u7406\u6389\uff0c\u4e0d\u4f1a\u4ea7\u751f\u50f5\u5c38\u8fdb\u7a0b\uff0c\u4e5f\u4e0d\u4f1a\u901a\u77e5\u7236\u8fdb\u7a0b\u3002\u7cfb\u7edf\u9ed8\u8ba4\u7684\u5ffd\u7565\u52a8\u4f5c\u548c\u7528\u6237\u7528signal\u6216sigaction\u51fd\u6570\u81ea\u5b9a\u4e49\u7684\u5ffd\u7565\u901a\u5e38\u662f\u6ca1\u6709\u533a\u522b\u7684\uff0c\u4f46\u8fd9\u662f\u4e00\u4e2a\u7279\u4f8b\u3002\u6b64\u65b9\u6cd5\u5bf9\u4e8eLinux\u53ef\u7528\uff0c\u4f46\u4e0d\u4fdd\u8bc1\u5728\u5176\u4ed6UNIX\u7cfb\u7edf\u4e0a\u90fd\u53ef\u7528\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4e2d\u8c03\u7528signal\u51fd\u6570\u5c06SIGCHLD\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u81ea\u5b9a\u4e49\u4e3a\u5ffd\u7565\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;signal.h&gt;\n#include &lt;stdlib.h&gt;\n\nint main()\n{\n    signal(SIGCHLD, SIG_IGN);\n    if (fork() == 0){\n        \/\/child\n        printf(\"child is running, child dead: %d\\n\", getpid());\n        sleep(3);\n        exit(1);\n    }\n    \/\/father\n    while (1);\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u6b64\u65f6\u5b50\u8fdb\u7a0b\u5728\u7ec8\u6b62\u65f6\u4f1a\u81ea\u52a8\u88ab\u6e05\u7406\u6389\uff0c\u4e0d\u4f1a\u4ea7\u751f\u50f5\u5c38\u8fdb\u7a0b\uff0c\u4e5f\u4e0d\u4f1a\u901a\u77e5\u7236\u8fdb\u7a0b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167957145797357.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAMjAyMWRyYWdvbg==,size_20,color_FFFFFF,t_70,g_se,x_16-167957145797357.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"img\"\/><\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u4fe1\u53f7\u5165\u95e8 \u751f\u6d3b\u89d2\u5ea6\u7684\u4fe1\u53f7 \u6280\u672f\u5e94\u7528\u89d2\u5ea6\u7684\u4fe1\u53f7 \u7f16\u5199\u4ee5\u4e0b\u7a0b\u5e8f\u5e76\u8fd0\u884c\uff1a \u6211\u4eec\u77e5\u9053\u8be5\u7a0b\u5e8f\u7684\u8fd0\u884c\u7ed3\u679c\u5c31\u662f\u6b7b\u5faa\u73af\u5730\u8fdb\u884c\u6253 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,1],"tags":[31],"class_list":["post-153","post","type-post","status-publish","format-standard","hentry","category-linux","category-learn","tag-31"],"_links":{"self":[{"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/posts\/153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=153"}],"version-history":[{"count":1,"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/posts\/153\/revisions"}],"predecessor-version":[{"id":154,"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/posts\/153\/revisions\/154"}],"wp:attachment":[{"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codergodv.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}