{"id":5033,"date":"2021-02-03T00:32:53","date_gmt":"2021-02-02T16:32:53","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=5033"},"modified":"2021-02-03T00:32:53","modified_gmt":"2021-02-02T16:32:53","slug":"linux%e4%bf%a1%e5%8f%b7signal%e5%a4%84%e7%90%86%e6%9c%ba%e5%88%b6%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/5033","title":{"rendered":"linux\u4fe1\u53f7(signal)\u5904\u7406\u673a\u5236\u5206\u6790"},"content":{"rendered":"<div class=\"article-header-box\">\n<div class=\"article-header\">\n<div class=\"article-title-box\"><\/div>\n<div class=\"article-info-box\">\n<div class=\"blog-tags-box\">\n<div class=\"tags-box artic-tag-box\"><a href=\"https:\/\/blog.csdn.net\/q13424813100\/article\/details\/51247641\">\u539f\u6587\u5730\u5740<\/a><\/div>\n<\/div>\n<div class=\"operating\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<article class=\"baidu_pl\">\n<div id=\"article_content\" class=\"article_content clearfix\">\n<div id=\"content_views\" class=\"htmledit_views\">\n<p>\u3010\u6458\u8981\u3011\u672c\u6587\u5206\u6790\u4e86Linux\u5185\u6838\u5bf9\u4e8e\u4fe1\u53f7\u7684\u5b9e\u73b0\u673a\u5236\u548c\u5e94\u7528\u5c42\u7684\u76f8\u5173\u5904\u7406\u3002\u9996\u5148\u4ecb\u7ecd\u4e86\u8f6f\u4e2d\u65ad\u4fe1\u53f7\u7684\u672c\u8d28\u53ca\u4fe1\u53f7\u7684\u4e24\u79cd\u4e0d\u540c\u5206\u7c7b\u65b9\u6cd5\u5c24\u5176\u662f\u4e0d\u53ef\u9760\u4fe1\u53f7\u7684\u539f\u7406\u3002\u63a5\u7740\u5206\u6790\u4e86\u5185\u6838\u5bf9\u4e8e\u4fe1\u53f7\u7684\u5904\u7406\u6d41\u7a0b\u5305\u62ec\u4fe1\u53f7\u7684\u89e6\u53d1\/\u6ce8\u518c\/\u6267\u884c\u53ca\u6ce8\u9500\u7b49\u3002\u6700\u540e\u4ecb\u7ecd\u4e86\u5e94\u7528\u5c42\u7684\u76f8\u5173\u5904\u7406\uff0c\u4e3b\u8981\u5305\u62ec\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u7684\u5b89\u88c5\u3001\u4fe1\u53f7\u7684\u53d1\u9001\u3001\u5c4f\u853d\u963b\u585e\u7b49\uff0c\u6700\u540e\u7ed9\u4e86\u51e0\u4e2a\u7b80\u5355\u7684\u5e94\u7528\u5b9e\u4f8b\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u3010\u5173\u952e\u5b57\u3011\u8f6f\u4e2d\u65ad\u4fe1\u53f7\uff0csignal\uff0csigaction\uff0ckill\uff0csigqueue\uff0csettimer\uff0csigmask\uff0csigprocmask\uff0csigset_t<\/p>\n<p>&nbsp;<\/p>\n<h1><a name=\"t0\"><\/a><a name=\"t0\"><\/a>1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u672c\u8d28<\/h1>\n<p>\u8f6f\u4e2d\u65ad\u4fe1\u53f7\uff08signal\uff0c\u53c8\u7b80\u79f0\u4e3a\u4fe1\u53f7\uff09\u7528\u6765\u901a\u77e5\u8fdb\u7a0b\u53d1\u751f\u4e86\u5f02\u6b65\u4e8b\u4ef6\u3002\u5728\u8f6f\u4ef6\u5c42\u6b21\u4e0a\u662f\u5bf9\u4e2d\u65ad\u673a\u5236\u7684\u4e00\u79cd\u6a21\u62df\uff0c\u5728\u539f\u7406\u4e0a\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u6536\u5230\u4e00\u4e2a\u4fe1\u53f7\u4e0e\u5904\u7406\u5668\u6536\u5230\u4e00\u4e2a\u4e2d\u65ad\u8bf7\u6c42\u53ef\u4ee5\u8bf4\u662f\u4e00\u6837\u7684\u3002\u4fe1\u53f7\u662f\u8fdb\u7a0b\u95f4\u901a\u4fe1\u673a\u5236\u4e2d\u552f\u4e00\u7684\u5f02\u6b65\u901a\u4fe1\u673a\u5236\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u4e0d\u5fc5\u901a\u8fc7\u4efb\u4f55\u64cd\u4f5c\u6765\u7b49\u5f85\u4fe1\u53f7\u7684\u5230\u8fbe\uff0c\u4e8b\u5b9e\u4e0a\uff0c\u8fdb\u7a0b\u4e5f\u4e0d\u77e5\u9053\u4fe1\u53f7\u5230\u5e95\u4ec0\u4e48\u65f6\u5019\u5230\u8fbe\u3002\u8fdb\u7a0b\u4e4b\u95f4\u53ef\u4ee5\u4e92\u76f8\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528kill\u53d1\u9001\u8f6f\u4e2d\u65ad\u4fe1\u53f7\u3002\u5185\u6838\u4e5f\u53ef\u4ee5\u56e0\u4e3a\u5185\u90e8\u4e8b\u4ef6\u800c\u7ed9\u8fdb\u7a0b\u53d1\u9001\u4fe1\u53f7\uff0c\u901a\u77e5\u8fdb\u7a0b\u53d1\u751f\u4e86\u67d0\u4e2a\u4e8b\u4ef6\u3002\u4fe1\u53f7\u673a\u5236\u9664\u4e86\u57fa\u672c\u901a\u77e5\u529f\u80fd\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f20\u9012\u9644\u52a0\u4fe1\u606f\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6536\u5230\u4fe1\u53f7\u7684\u8fdb\u7a0b\u5bf9\u5404\u79cd\u4fe1\u53f7\u6709\u4e0d\u540c\u7684\u5904\u7406\u65b9\u6cd5\u3002\u5904\u7406\u65b9\u6cd5\u53ef\u4ee5\u5206\u4e3a\u4e09\u7c7b\uff1a<\/p>\n<p>\u7b2c\u4e00\u79cd\u662f\u7c7b\u4f3c\u4e2d\u65ad\u7684\u5904\u7406\u7a0b\u5e8f\uff0c\u5bf9\u4e8e\u9700\u8981\u5904\u7406\u7684\u4fe1\u53f7\uff0c\u8fdb\u7a0b\u53ef\u4ee5\u6307\u5b9a\u5904\u7406\u51fd\u6570\uff0c\u7531\u8be5\u51fd\u6570\u6765\u5904\u7406\u3002<\/p>\n<p>\u7b2c\u4e8c\u79cd\u65b9\u6cd5\u662f\uff0c\u5ffd\u7565\u67d0\u4e2a\u4fe1\u53f7\uff0c\u5bf9\u8be5\u4fe1\u53f7\u4e0d\u505a\u4efb\u4f55\u5904\u7406\uff0c\u5c31\u8c61\u672a\u53d1\u751f\u8fc7\u4e00\u6837\u3002<\/p>\n<p>\u7b2c\u4e09\u79cd\u65b9\u6cd5\u662f\uff0c\u5bf9\u8be5\u4fe1\u53f7\u7684\u5904\u7406\u4fdd\u7559\u7cfb\u7edf\u7684\u9ed8\u8ba4\u503c\uff0c\u8fd9\u79cd\u7f3a\u7701\u64cd\u4f5c\uff0c\u5bf9\u5927\u90e8\u5206\u7684\u4fe1\u53f7\u7684\u7f3a\u7701\u64cd\u4f5c\u662f\u4f7f\u5f97\u8fdb\u7a0b\u7ec8\u6b62\u3002\u8fdb\u7a0b\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528signal\u6765\u6307\u5b9a\u8fdb\u7a0b\u5bf9\u67d0\u4e2a\u4fe1\u53f7\u7684\u5904\u7406\u884c\u4e3a\u3002<\/p>\n<p>&nbsp;<\/p>\n<h1><a name=\"t1\"><\/a><a name=\"t1\"><\/a>2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u7684\u79cd\u7c7b<\/h1>\n<p>\u53ef\u4ee5\u4ece\u4e24\u4e2a\u4e0d\u540c\u7684\u5206\u7c7b\u89d2\u5ea6\u5bf9\u4fe1\u53f7\u8fdb\u884c\u5206\u7c7b\uff1a<\/p>\n<p>\u53ef\u9760\u6027\u65b9\u9762\uff1a\u53ef\u9760\u4fe1\u53f7\u4e0e\u4e0d\u53ef\u9760\u4fe1\u53f7\uff1b<\/p>\n<p>\u4e0e\u65f6\u95f4\u7684\u5173\u7cfb\u4e0a\uff1a\u5b9e\u65f6\u4fe1\u53f7\u4e0e\u975e\u5b9e\u65f6\u4fe1\u53f7\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t2\"><\/a><a name=\"t2\"><\/a>2.1\u00a0\u00a0\u00a0\u00a0\u53ef\u9760\u4fe1\u53f7\u4e0e\u4e0d\u53ef\u9760\u4fe1\u53f7<\/h2>\n<p>Linux\u4fe1\u53f7\u673a\u5236\u57fa\u672c\u4e0a\u662f\u4eceUnix\u7cfb\u7edf\u4e2d\u7ee7\u627f\u8fc7\u6765\u7684\u3002\u65e9\u671fUnix\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u673a\u5236\u6bd4\u8f83\u7b80\u5355\u548c\u539f\u59cb\uff0c\u4fe1\u53f7\u503c\u5c0f\u4e8eSIGRTMIN\u7684\u4fe1\u53f7\u90fd\u662f\u4e0d\u53ef\u9760\u4fe1\u53f7\u3002\u8fd9\u5c31\u662f&#8221;\u4e0d\u53ef\u9760\u4fe1\u53f7&#8221;\u7684\u6765\u6e90\u3002\u5b83\u7684\u4e3b\u8981\u95ee\u9898\u662f\u4fe1\u53f7\u53ef\u80fd\u4e22\u5931\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u968f\u7740\u65f6\u95f4\u7684\u53d1\u5c55\uff0c\u5b9e\u8df5\u8bc1\u660e\u4e86\u6709\u5fc5\u8981\u5bf9\u4fe1\u53f7\u7684\u539f\u59cb\u673a\u5236\u52a0\u4ee5\u6539\u8fdb\u548c\u6269\u5145\u3002\u7531\u4e8e\u539f\u6765\u5b9a\u4e49\u7684\u4fe1\u53f7\u5df2\u6709\u8bb8\u591a\u5e94\u7528\uff0c\u4e0d\u597d\u518d\u505a\u6539\u52a8\uff0c\u6700\u7ec8\u53ea\u597d\u53c8\u65b0\u589e\u52a0\u4e86\u4e00\u4e9b\u4fe1\u53f7\uff0c\u5e76\u5728\u4e00\u5f00\u59cb\u5c31\u628a\u5b83\u4eec\u5b9a\u4e49\u4e3a\u53ef\u9760\u4fe1\u53f7\uff0c\u8fd9\u4e9b\u4fe1\u53f7\u652f\u6301\u6392\u961f\uff0c\u4e0d\u4f1a\u4e22\u5931\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4fe1\u53f7\u503c\u4f4d\u4e8eSIGRTMIN\u548cSIGRTMAX\u4e4b\u95f4\u7684\u4fe1\u53f7\u90fd\u662f\u53ef\u9760\u4fe1\u53f7\uff0c\u53ef\u9760\u4fe1\u53f7\u514b\u670d\u4e86\u4fe1\u53f7\u53ef\u80fd\u4e22\u5931\u7684\u95ee\u9898\u3002Linux\u5728\u652f\u6301\u65b0\u7248\u672c\u7684\u4fe1\u53f7\u5b89\u88c5\u51fd\u6570sigation()\u4ee5\u53ca\u4fe1\u53f7\u53d1\u9001\u51fd\u6570sigqueue()\u7684\u540c\u65f6\uff0c\u4ecd\u7136\u652f\u6301\u65e9\u671f\u7684signal()\u4fe1\u53f7\u5b89\u88c5\u51fd\u6570\uff0c\u652f\u6301\u4fe1\u53f7\u53d1\u9001\u51fd\u6570kill()\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4fe1\u53f7\u7684\u53ef\u9760\u4e0e\u4e0d\u53ef\u9760\u53ea\u4e0e\u4fe1\u53f7\u503c\u6709\u5173\uff0c\u4e0e\u4fe1\u53f7\u7684\u53d1\u9001\u53ca\u5b89\u88c5\u51fd\u6570\u65e0\u5173\u3002\u76ee\u524dlinux\u4e2d\u7684signal()\u662f\u901a\u8fc7sigation()\u51fd\u6570\u5b9e\u73b0\u7684\uff0c\u56e0\u6b64\uff0c\u5373\u4f7f\u901a\u8fc7signal()\u5b89\u88c5\u7684\u4fe1\u53f7\uff0c\u5728\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u7684\u7ed3\u5c3e\u4e5f\u4e0d\u5fc5\u518d\u8c03\u7528\u4e00\u6b21\u4fe1\u53f7\u5b89\u88c5\u51fd\u6570\u3002\u540c\u65f6\uff0c\u7531signal()\u5b89\u88c5\u7684\u5b9e\u65f6\u4fe1\u53f7\u652f\u6301\u6392\u961f\uff0c\u540c\u6837\u4e0d\u4f1a\u4e22\u5931\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5bf9\u4e8e\u76ee\u524dlinux\u7684\u4e24\u4e2a\u4fe1\u53f7\u5b89\u88c5\u51fd\u6570\uff1asignal()\u53casigaction()\u6765\u8bf4\uff0c\u5b83\u4eec\u90fd\u4e0d\u80fd\u628aSIGRTMIN\u4ee5\u524d\u7684\u4fe1\u53f7\u53d8\u6210\u53ef\u9760\u4fe1\u53f7\uff08\u90fd\u4e0d\u652f\u6301\u6392\u961f\uff0c\u4ecd\u6709\u53ef\u80fd\u4e22\u5931\uff0c\u4ecd\u7136\u662f\u4e0d\u53ef\u9760\u4fe1\u53f7\uff09\uff0c\u800c\u4e14\u5bf9SIGRTMIN\u4ee5\u540e\u7684\u4fe1\u53f7\u90fd\u652f\u6301\u6392\u961f\u3002\u8fd9\u4e24\u4e2a\u51fd\u6570\u7684\u6700\u5927\u533a\u522b\u5728\u4e8e\uff0c\u7ecf\u8fc7sigaction\u5b89\u88c5\u7684\u4fe1\u53f7\u90fd\u80fd\u4f20\u9012\u4fe1\u606f\u7ed9\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0c\u800c\u7ecf\u8fc7signal\u5b89\u88c5\u7684\u4fe1\u53f7\u4e0d\u80fd\u5411\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u4f20\u9012\u4fe1\u606f\u3002\u5bf9\u4e8e\u4fe1\u53f7\u53d1\u9001\u51fd\u6570\u6765\u8bf4\u4e5f\u662f\u4e00\u6837\u7684\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t3\"><\/a><a name=\"t3\"><\/a>2.2\u00a0\u00a0\u00a0\u00a0\u5b9e\u65f6\u4fe1\u53f7\u4e0e\u975e\u5b9e\u65f6\u4fe1\u53f7<\/h2>\n<p>\u65e9\u671fUnix\u7cfb\u7edf\u53ea\u5b9a\u4e49\u4e8632\u79cd\u4fe1\u53f7\uff0c\u524d32\u79cd\u4fe1\u53f7\u5df2\u7ecf\u6709\u4e86\u9884\u5b9a\u4e49\u503c\uff0c\u6bcf\u4e2a\u4fe1\u53f7\u6709\u4e86\u786e\u5b9a\u7684\u7528\u9014\u53ca\u542b\u4e49\uff0c\u5e76\u4e14\u6bcf\u79cd\u4fe1\u53f7\u90fd\u6709\u5404\u81ea\u7684\u7f3a\u7701\u52a8\u4f5c\u3002\u5982\u6309\u952e\u76d8\u7684CTRL ^C\u65f6\uff0c\u4f1a\u4ea7\u751fSIGINT\u4fe1\u53f7\uff0c\u5bf9\u8be5\u4fe1\u53f7\u7684\u9ed8\u8ba4\u53cd\u5e94\u5c31\u662f\u8fdb\u7a0b\u7ec8\u6b62\u3002\u540e32\u4e2a\u4fe1\u53f7\u8868\u793a\u5b9e\u65f6\u4fe1\u53f7\uff0c\u7b49\u540c\u4e8e\u524d\u9762\u9610\u8ff0\u7684\u53ef\u9760\u4fe1\u53f7\u3002\u8fd9\u4fdd\u8bc1\u4e86\u53d1\u9001\u7684\u591a\u4e2a\u5b9e\u65f6\u4fe1\u53f7\u90fd\u88ab\u63a5\u6536\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u975e\u5b9e\u65f6\u4fe1\u53f7\u90fd\u4e0d\u652f\u6301\u6392\u961f\uff0c\u90fd\u662f\u4e0d\u53ef\u9760\u4fe1\u53f7\uff1b\u5b9e\u65f6\u4fe1\u53f7\u90fd\u652f\u6301\u6392\u961f\uff0c\u90fd\u662f\u53ef\u9760\u4fe1\u53f7\u3002<\/p>\n<p>&nbsp;<\/p>\n<h1><a name=\"t4\"><\/a><a name=\"t4\"><\/a>3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u5904\u7406\u6d41\u7a0b<\/h1>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u5bf9\u4e8e\u4e00\u4e2a\u5b8c\u6574\u7684\u4fe1\u53f7\u751f\u547d\u5468\u671f(\u4ece\u4fe1\u53f7\u53d1\u9001\u5230\u76f8\u5e94\u7684\u5904\u7406\u51fd\u6570\u6267\u884c\u5b8c\u6bd5)\u6765\u8bf4\uff0c\u53ef\u4ee5\u5206\u4e3a\u4e09\u4e2a\u9636\u6bb5\uff1a<\/p>\n<p>\u4fe1\u53f7\u8bde\u751f<\/p>\n<p>\u4fe1\u53f7\u5728\u8fdb\u7a0b\u4e2d\u6ce8\u518c<\/p>\n<p>\u4fe1\u53f7\u7684\u6267\u884c\u548c\u6ce8\u9500<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t5\"><\/a><a name=\"t5\"><\/a>3.1\u00a0\u00a0\u00a0 \u4fe1\u53f7\u8bde\u751f<\/h2>\n<p>\u4fe1\u53f7\u4e8b\u4ef6\u7684\u53d1\u751f\u6709\u4e24\u4e2a\u6765\u6e90\uff1a\u786c\u4ef6\u6765\u6e90(\u6bd4\u5982\u6211\u4eec\u6309\u4e0b\u4e86\u952e\u76d8\u6216\u8005\u5176\u5b83\u786c\u4ef6\u6545\u969c)\uff1b\u8f6f\u4ef6\u6765\u6e90\uff0c\u6700\u5e38\u7528\u53d1\u9001\u4fe1\u53f7\u7684\u7cfb\u7edf\u51fd\u6570\u662fkill, raise, alarm\u548csetitimer\u4ee5\u53casigqueue\u51fd\u6570\uff0c\u8f6f\u4ef6\u6765\u6e90\u8fd8\u5305\u62ec\u4e00\u4e9b\u975e\u6cd5\u8fd0\u7b97\u7b49\u64cd\u4f5c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8fd9\u91cc\u6309\u53d1\u51fa\u4fe1\u53f7\u7684\u539f\u56e0\u7b80\u5355\u5206\u7c7b\uff0c\u4ee5\u4e86\u89e3\u5404\u79cd\u4fe1\u53f7\uff1a<\/p>\n<p>\uff081\uff09 \u4e0e\u8fdb\u7a0b\u7ec8\u6b62\u76f8\u5173\u7684\u4fe1\u53f7\u3002\u5f53\u8fdb\u7a0b\u9000\u51fa\uff0c\u6216\u8005\u5b50\u8fdb\u7a0b\u7ec8\u6b62\u65f6\uff0c\u53d1\u51fa\u8fd9\u7c7b\u4fe1\u53f7\u3002<\/p>\n<p>\uff082\uff09\u00a0\u4e0e\u8fdb\u7a0b\u4f8b\u5916\u4e8b\u4ef6\u76f8\u5173\u7684\u4fe1\u53f7\u3002\u5982\u8fdb\u7a0b\u8d8a\u754c\uff0c\u6216\u4f01\u56fe\u5199\u4e00\u4e2a\u53ea\u8bfb\u7684\u5185\u5b58\u533a\u57df\uff08\u5982\u7a0b\u5e8f\u6b63\u6587\u533a\uff09\uff0c\u6216\u6267\u884c\u4e00\u4e2a\u7279\u6743\u6307\u4ee4\u53ca\u5176\u4ed6\u5404\u79cd\u786c\u4ef6\u9519\u8bef\u3002<\/p>\n<p>\uff083\uff09 \u4e0e\u5728\u7cfb\u7edf\u8c03\u7528\u671f\u95f4\u9047\u5230\u4e0d\u53ef\u6062\u590d\u6761\u4ef6\u76f8\u5173\u7684\u4fe1\u53f7\u3002\u5982\u6267\u884c\u7cfb\u7edf\u8c03\u7528exec\u65f6\uff0c\u539f\u6709\u8d44\u6e90\u5df2\u7ecf\u91ca\u653e\uff0c\u800c\u76ee\u524d\u7cfb\u7edf\u8d44\u6e90\u53c8\u5df2\u7ecf\u8017\u5c3d\u3002<\/p>\n<p>\uff084\uff09 \u4e0e\u6267\u884c\u7cfb\u7edf\u8c03\u7528\u65f6\u9047\u5230\u975e\u9884\u6d4b\u9519\u8bef\u6761\u4ef6\u76f8\u5173\u7684\u4fe1\u53f7\u3002\u5982\u6267\u884c\u4e00\u4e2a\u5e76\u4e0d\u5b58\u5728\u7684\u7cfb\u7edf\u8c03\u7528\u3002<\/p>\n<p>\uff085\uff09\u00a0\u5728\u7528\u6237\u6001\u4e0b\u7684\u8fdb\u7a0b\u53d1\u51fa\u7684\u4fe1\u53f7\u3002\u5982\u8fdb\u7a0b\u8c03\u7528\u7cfb\u7edf\u8c03\u7528kill\u5411\u5176\u4ed6\u8fdb\u7a0b\u53d1\u9001\u4fe1\u53f7\u3002<\/p>\n<p>\uff086\uff09\u00a0\u4e0e\u7ec8\u7aef\u4ea4\u4e92\u76f8\u5173\u7684\u4fe1\u53f7\u3002\u5982\u7528\u6237\u5173\u95ed\u4e00\u4e2a\u7ec8\u7aef\uff0c\u6216\u6309\u4e0bbreak\u952e\u7b49\u60c5\u51b5\u3002<\/p>\n<p>\uff087\uff09 \u8ddf\u8e2a\u8fdb\u7a0b\u6267\u884c\u7684\u4fe1\u53f7\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>Linux\u652f\u6301\u7684\u4fe1\u53f7\u5217\u8868\u5982\u4e0b\u3002\u5f88\u591a\u4fe1\u53f7\u662f\u4e0e\u673a\u5668\u7684\u4f53\u7cfb\u7ed3\u6784\u76f8\u5173\u7684<\/p>\n<p>\u4fe1\u53f7\u503c \u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c \u53d1\u51fa\u4fe1\u53f7\u7684\u539f\u56e0<\/p>\n<p>SIGHUP 1 A \u7ec8\u7aef\u6302\u8d77\u6216\u8005\u63a7\u5236\u8fdb\u7a0b\u7ec8\u6b62<\/p>\n<p>SIGINT 2 A \u952e\u76d8\u4e2d\u65ad\uff08\u5982break\u952e\u88ab\u6309\u4e0b\uff09<\/p>\n<p>SIGQUIT 3 C \u952e\u76d8\u7684\u9000\u51fa\u952e\u88ab\u6309\u4e0b<\/p>\n<p>SIGILL 4 C \u975e\u6cd5\u6307\u4ee4<\/p>\n<p>SIGABRT 6 C \u7531abort(3)\u53d1\u51fa\u7684\u9000\u51fa\u6307\u4ee4<\/p>\n<p>SIGFPE 8 C \u6d6e\u70b9\u5f02\u5e38<\/p>\n<p>SIGKILL 9 AEF Kill\u4fe1\u53f7<\/p>\n<p>SIGSEGV 11 C \u65e0\u6548\u7684\u5185\u5b58\u5f15\u7528<\/p>\n<p>SIGPIPE 13 A \u7ba1\u9053\u7834\u88c2: \u5199\u4e00\u4e2a\u6ca1\u6709\u8bfb\u7aef\u53e3\u7684\u7ba1\u9053<\/p>\n<p>SIGALRM 14 A \u7531alarm(2)\u53d1\u51fa\u7684\u4fe1\u53f7<\/p>\n<p>SIGTERM 15 A \u7ec8\u6b62\u4fe1\u53f7<\/p>\n<p>SIGUSR1 30,10,16 A \u7528\u6237\u81ea\u5b9a\u4e49\u4fe1\u53f71<\/p>\n<p>SIGUSR2 31,12,17 A \u7528\u6237\u81ea\u5b9a\u4e49\u4fe1\u53f72<\/p>\n<p>SIGCHLD 20,17,18 B \u5b50\u8fdb\u7a0b\u7ed3\u675f\u4fe1\u53f7<\/p>\n<p>SIGCONT 19,18,25 \u8fdb\u7a0b\u7ee7\u7eed\uff08\u66fe\u88ab\u505c\u6b62\u7684\u8fdb\u7a0b\uff09<\/p>\n<p>SIGSTOP 17,19,23 DEF \u7ec8\u6b62\u8fdb\u7a0b<\/p>\n<p>SIGTSTP 18,20,24 D \u63a7\u5236\u7ec8\u7aef\uff08tty\uff09\u4e0a\u6309\u4e0b\u505c\u6b62\u952e<\/p>\n<p>SIGTTIN 21,21,26 D \u540e\u53f0\u8fdb\u7a0b\u4f01\u56fe\u4ece\u63a7\u5236\u7ec8\u7aef\u8bfb<\/p>\n<p>SIGTTOU 22,22,27 D \u540e\u53f0\u8fdb\u7a0b\u4f01\u56fe\u4ece\u63a7\u5236\u7ec8\u7aef\u5199<\/p>\n<p>&nbsp;<\/p>\n<p>\u5904\u7406\u52a8\u4f5c\u4e00\u9879\u4e2d\u7684\u5b57\u6bcd\u542b\u4e49\u5982\u4e0b<\/p>\n<p>A \u7f3a\u7701\u7684\u52a8\u4f5c\u662f\u7ec8\u6b62\u8fdb\u7a0b<\/p>\n<p>B \u7f3a\u7701\u7684\u52a8\u4f5c\u662f\u5ffd\u7565\u6b64\u4fe1\u53f7\uff0c\u5c06\u8be5\u4fe1\u53f7\u4e22\u5f03\uff0c\u4e0d\u505a\u5904\u7406<\/p>\n<p>C \u7f3a\u7701\u7684\u52a8\u4f5c\u662f\u7ec8\u6b62\u8fdb\u7a0b\u5e76\u8fdb\u884c\u5185\u6838\u6620\u50cf\u8f6c\u50a8\uff08dump core\uff09\uff0c\u5185\u6838\u6620\u50cf\u8f6c\u50a8\u662f\u6307\u5c06\u8fdb\u7a0b\u6570\u636e\u5728\u5185\u5b58\u7684\u6620\u50cf\u548c\u8fdb\u7a0b\u5728\u5185\u6838\u7ed3\u6784\u4e2d\u7684\u90e8\u5206\u5185\u5bb9\u4ee5\u4e00\u5b9a\u683c\u5f0f\u8f6c\u50a8\u5230\u6587\u4ef6\u7cfb\u7edf\uff0c\u5e76\u4e14\u8fdb\u7a0b\u9000\u51fa\u6267\u884c\uff0c\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u4e3a\u7a0b\u5e8f\u5458\u63d0\u4f9b\u4e86\u65b9\u4fbf\uff0c\u4f7f\u5f97\u4ed6\u4eec\u53ef\u4ee5\u5f97\u5230\u8fdb\u7a0b\u5f53\u65f6\u6267\u884c\u65f6\u7684\u6570\u636e\u503c\uff0c\u5141\u8bb8\u4ed6\u4eec\u786e\u5b9a\u8f6c\u50a8\u7684\u539f\u56e0\uff0c\u5e76\u4e14\u53ef\u4ee5\u8c03\u8bd5\u4ed6\u4eec\u7684\u7a0b\u5e8f\u3002<\/p>\n<p>D \u7f3a\u7701\u7684\u52a8\u4f5c\u662f\u505c\u6b62\u8fdb\u7a0b\uff0c\u8fdb\u5165\u505c\u6b62\u72b6\u51b5\u4ee5\u540e\u8fd8\u80fd\u91cd\u65b0\u8fdb\u884c\u4e0b\u53bb\uff0c\u4e00\u822c\u662f\u5728\u8c03\u8bd5\u7684\u8fc7\u7a0b\u4e2d\uff08\u4f8b\u5982ptrace\u7cfb\u7edf\u8c03\u7528\uff09<\/p>\n<p>E \u4fe1\u53f7\u4e0d\u80fd\u88ab\u6355\u83b7<\/p>\n<p>F \u4fe1\u53f7\u4e0d\u80fd\u88ab\u5ffd\u7565<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t6\"><\/a><a name=\"t6\"><\/a>3.2\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u5728\u76ee\u6807\u8fdb\u7a0b\u4e2d\u6ce8\u518c<\/h2>\n<p>\u5728\u8fdb\u7a0b\u8868\u7684\u8868\u9879\u4e2d\u6709\u4e00\u4e2a\u8f6f\u4e2d\u65ad\u4fe1\u53f7\u57df\uff0c\u8be5\u57df\u4e2d\u6bcf\u4e00\u4f4d\u5bf9\u5e94\u4e00\u4e2a\u4fe1\u53f7\u3002\u5185\u6838\u7ed9\u4e00\u4e2a\u8fdb\u7a0b\u53d1\u9001\u8f6f\u4e2d\u65ad\u4fe1\u53f7\u7684\u65b9\u6cd5\uff0c\u662f\u5728\u8fdb\u7a0b\u6240\u5728\u7684\u8fdb\u7a0b\u8868\u9879\u7684\u4fe1\u53f7\u57df\u8bbe\u7f6e\u5bf9\u5e94\u4e8e\u8be5\u4fe1\u53f7\u7684\u4f4d\u3002\u5982\u679c\u4fe1\u53f7\u53d1\u9001\u7ed9\u4e00\u4e2a\u6b63\u5728\u7761\u7720\u7684\u8fdb\u7a0b\uff0c\u5982\u679c\u8fdb\u7a0b\u7761\u7720\u5728\u53ef\u88ab\u4e2d\u65ad\u7684\u4f18\u5148\u7ea7\u4e0a\uff0c\u5219\u5524\u9192\u8fdb\u7a0b\uff1b\u5426\u5219\u4ec5\u8bbe\u7f6e\u8fdb\u7a0b\u8868\u4e2d\u4fe1\u53f7\u57df\u76f8\u5e94\u7684\u4f4d\uff0c\u800c\u4e0d\u5524\u9192\u8fdb\u7a0b\u3002\u5982\u679c\u53d1\u9001\u7ed9\u4e00\u4e2a\u5904\u4e8e\u53ef\u8fd0\u884c\u72b6\u6001\u7684\u8fdb\u7a0b\uff0c\u5219\u53ea\u7f6e\u76f8\u5e94\u7684\u57df\u5373\u53ef\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8fdb\u7a0b\u7684task_struct\u7ed3\u6784\u4e2d\u6709\u5173\u4e8e\u672c\u8fdb\u7a0b\u4e2d\u672a\u51b3\u4fe1\u53f7\u7684\u6570\u636e\u6210\u5458\uff1a\u00a0struct sigpending pending\uff1a<\/p>\n<p>struct sigpending{<\/p>\n<p>struct sigqueue *head, *tail;<\/p>\n<p>sigset_t signal;<\/p>\n<p>};<\/p>\n<p>&nbsp;<\/p>\n<p>\u7b2c\u4e09\u4e2a\u6210\u5458\u662f\u8fdb\u7a0b\u4e2d\u6240\u6709\u672a\u51b3\u4fe1\u53f7\u96c6\uff0c\u7b2c\u4e00\u3001\u7b2c\u4e8c\u4e2a\u6210\u5458\u5206\u522b\u6307\u5411\u4e00\u4e2asigqueue\u7c7b\u578b\u7684\u7ed3\u6784\u94fe\uff08\u79f0\u4e4b\u4e3a&#8221;\u672a\u51b3\u4fe1\u53f7\u4fe1\u606f\u94fe&#8221;\uff09\u7684\u9996\u5c3e\uff0c\u4fe1\u606f\u94fe\u4e2d\u7684\u6bcf\u4e2asigqueue\u7ed3\u6784\u523b\u753b\u4e00\u4e2a\u7279\u5b9a\u4fe1\u53f7\u6240\u643a\u5e26\u7684\u4fe1\u606f\uff0c\u5e76\u6307\u5411\u4e0b\u4e00\u4e2asigqueue\u7ed3\u6784:<\/p>\n<p>struct sigqueue{<\/p>\n<p>struct sigqueue *next;<\/p>\n<p>siginfo_t info;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>\u4fe1\u53f7\u5728\u8fdb\u7a0b\u4e2d\u6ce8\u518c\u6307\u7684\u5c31\u662f\u4fe1\u53f7\u503c\u52a0\u5165\u5230\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u96c6sigset_t signal\uff08\u6bcf\u4e2a\u4fe1\u53f7\u5360\u7528\u4e00\u4f4d\uff09\u4e2d\uff0c\u5e76\u4e14\u4fe1\u53f7\u6240\u643a\u5e26\u7684\u4fe1\u606f\u88ab\u4fdd\u7559\u5230\u672a\u51b3\u4fe1\u53f7\u4fe1\u606f\u94fe\u7684\u67d0\u4e2asigqueue\u7ed3\u6784\u4e2d\u3002\u53ea\u8981\u4fe1\u53f7\u5728\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u96c6\u4e2d\uff0c\u8868\u660e\u8fdb\u7a0b\u5df2\u7ecf\u77e5\u9053\u8fd9\u4e9b\u4fe1\u53f7\u7684\u5b58\u5728\uff0c\u4f46\u8fd8\u6ca1\u6765\u5f97\u53ca\u5904\u7406\uff0c\u6216\u8005\u8be5\u4fe1\u53f7\u88ab\u8fdb\u7a0b\u963b\u585e\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5f53\u4e00\u4e2a\u5b9e\u65f6\u4fe1\u53f7\u53d1\u9001\u7ed9\u4e00\u4e2a\u8fdb\u7a0b\u65f6\uff0c\u4e0d\u7ba1\u8be5\u4fe1\u53f7\u662f\u5426\u5df2\u7ecf\u5728\u8fdb\u7a0b\u4e2d\u6ce8\u518c\uff0c\u90fd\u4f1a\u88ab\u518d\u6ce8\u518c\u4e00\u6b21\uff0c\u56e0\u6b64\uff0c\u4fe1\u53f7\u4e0d\u4f1a\u4e22\u5931\uff0c\u56e0\u6b64\uff0c\u5b9e\u65f6\u4fe1\u53f7\u53c8\u53eb\u505a&#8221;\u53ef\u9760\u4fe1\u53f7&#8221;\u3002\u8fd9\u610f\u5473\u7740\u540c\u4e00\u4e2a\u5b9e\u65f6\u4fe1\u53f7\u53ef\u4ee5\u5728\u540c\u4e00\u4e2a\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u4fe1\u606f\u94fe\u4e2d\u5360\u6709\u591a\u4e2asigqueue\u7ed3\u6784\uff08\u8fdb\u7a0b\u6bcf\u6536\u5230\u4e00\u4e2a\u5b9e\u65f6\u4fe1\u53f7\uff0c\u90fd\u4f1a\u4e3a\u5b83\u5206\u914d\u4e00\u4e2a\u7ed3\u6784\u6765\u767b\u8bb0\u8be5\u4fe1\u53f7\u4fe1\u606f\uff0c\u5e76\u628a\u8be5\u7ed3\u6784\u6dfb\u52a0\u5728\u672a\u51b3\u4fe1\u53f7\u94fe\u5c3e\uff0c\u5373\u6240\u6709\u8bde\u751f\u7684\u5b9e\u65f6\u4fe1\u53f7\u90fd\u4f1a\u5728\u76ee\u6807\u8fdb\u7a0b\u4e2d\u6ce8\u518c\uff09\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5f53\u4e00\u4e2a\u975e\u5b9e\u65f6\u4fe1\u53f7\u53d1\u9001\u7ed9\u4e00\u4e2a\u8fdb\u7a0b\u65f6\uff0c\u5982\u679c\u8be5\u4fe1\u53f7\u5df2\u7ecf\u5728\u8fdb\u7a0b\u4e2d\u6ce8\u518c\uff08\u901a\u8fc7sigset_t signal\u6307\u793a\uff09\uff0c\u5219\u8be5\u4fe1\u53f7\u5c06\u88ab\u4e22\u5f03\uff0c\u9020\u6210\u4fe1\u53f7\u4e22\u5931\u3002\u56e0\u6b64\uff0c\u975e\u5b9e\u65f6\u4fe1\u53f7\u53c8\u53eb\u505a&#8221;\u4e0d\u53ef\u9760\u4fe1\u53f7&#8221;\u3002\u8fd9\u610f\u5473\u7740\u540c\u4e00\u4e2a\u975e\u5b9e\u65f6\u4fe1\u53f7\u5728\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u4fe1\u606f\u94fe\u4e2d\uff0c\u81f3\u591a\u5360\u6709\u4e00\u4e2asigqueue\u7ed3\u6784\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u603b\u4e4b\u4fe1\u53f7\u6ce8\u518c\u4e0e\u5426\uff0c\u4e0e\u53d1\u9001\u4fe1\u53f7\u7684\u51fd\u6570\uff08\u5982kill()\u6216sigqueue()\u7b49\uff09\u4ee5\u53ca\u4fe1\u53f7\u5b89\u88c5\u51fd\u6570\uff08signal()\u53casigaction()\uff09\u65e0\u5173\uff0c\u53ea\u4e0e\u4fe1\u53f7\u503c\u6709\u5173\uff08\u4fe1\u53f7\u503c\u5c0f\u4e8eSIGRTMIN\u7684\u4fe1\u53f7\u6700\u591a\u53ea\u6ce8\u518c\u4e00\u6b21\uff0c\u4fe1\u53f7\u503c\u5728SIGRTMIN\u53caSIGRTMAX\u4e4b\u95f4\u7684\u4fe1\u53f7\uff0c\u53ea\u8981\u88ab\u8fdb\u7a0b\u63a5\u6536\u5230\u5c31\u88ab\u6ce8\u518c\uff09<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t7\"><\/a><a name=\"t7\"><\/a>3.3\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u7684\u6267\u884c\u548c\u6ce8\u9500<\/h2>\n<p>\u5185\u6838\u5904\u7406\u4e00\u4e2a\u8fdb\u7a0b\u6536\u5230\u7684\u8f6f\u4e2d\u65ad\u4fe1\u53f7\u662f\u5728\u8be5\u8fdb\u7a0b\u7684\u4e0a\u4e0b\u6587\u4e2d\uff0c\u56e0\u6b64\uff0c\u8fdb\u7a0b\u5fc5\u987b\u5904\u4e8e\u8fd0\u884c\u72b6\u6001\u3002\u5f53\u5176\u7531\u4e8e\u88ab\u4fe1\u53f7\u5524\u9192\u6216\u8005\u6b63\u5e38\u8c03\u5ea6\u91cd\u65b0\u83b7\u5f97CPU\u65f6\uff0c\u5728\u5176\u4ece\u5185\u6838\u7a7a\u95f4\u8fd4\u56de\u5230\u7528\u6237\u7a7a\u95f4\u65f6\u4f1a\u68c0\u6d4b\u662f\u5426\u6709\u4fe1\u53f7\u7b49\u5f85\u5904\u7406\u3002\u5982\u679c\u5b58\u5728\u672a\u51b3\u4fe1\u53f7\u7b49\u5f85\u5904\u7406\u4e14\u8be5\u4fe1\u53f7\u6ca1\u6709\u88ab\u8fdb\u7a0b\u963b\u585e\uff0c\u5219\u5728\u8fd0\u884c\u76f8\u5e94\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u524d\uff0c\u8fdb\u7a0b\u4f1a\u628a\u4fe1\u53f7\u5728\u672a\u51b3\u4fe1\u53f7\u94fe\u4e2d\u5360\u6709\u7684\u7ed3\u6784\u5378\u6389\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5bf9\u4e8e\u975e\u5b9e\u65f6\u4fe1\u53f7\u6765\u8bf4\uff0c\u7531\u4e8e\u5728\u672a\u51b3\u4fe1\u53f7\u4fe1\u606f\u94fe\u4e2d\u6700\u591a\u53ea\u5360\u7528\u4e00\u4e2asigqueue\u7ed3\u6784\uff0c\u56e0\u6b64\u8be5\u7ed3\u6784\u88ab\u91ca\u653e\u540e\uff0c\u5e94\u8be5\u628a\u4fe1\u53f7\u5728\u8fdb\u7a0b\u672a\u51b3\u4fe1\u53f7\u96c6\u4e2d\u5220\u9664\uff08\u4fe1\u53f7\u6ce8\u9500\u5b8c\u6bd5\uff09\uff1b\u800c\u5bf9\u4e8e\u5b9e\u65f6\u4fe1\u53f7\u6765\u8bf4\uff0c\u53ef\u80fd\u5728\u672a\u51b3\u4fe1\u53f7\u4fe1\u606f\u94fe\u4e2d\u5360\u7528\u591a\u4e2asigqueue\u7ed3\u6784\uff0c\u56e0\u6b64\u5e94\u8be5\u9488\u5bf9\u5360\u7528sigqueue\u7ed3\u6784\u7684\u6570\u76ee\u533a\u522b\u5bf9\u5f85\uff1a\u5982\u679c\u53ea\u5360\u7528\u4e00\u4e2asigqueue\u7ed3\u6784\uff08\u8fdb\u7a0b\u53ea\u6536\u5230\u8be5\u4fe1\u53f7\u4e00\u6b21\uff09\uff0c\u5219\u6267\u884c\u5b8c\u76f8\u5e94\u7684\u5904\u7406\u51fd\u6570\u540e\u5e94\u8be5\u628a\u4fe1\u53f7\u5728\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u96c6\u4e2d\u5220\u9664\uff08\u4fe1\u53f7\u6ce8\u9500\u5b8c\u6bd5\uff09\u3002\u5426\u5219\u5f85\u8be5\u4fe1\u53f7\u7684\u6240\u6709sigqueue\u5904\u7406\u5b8c\u6bd5\u540e\u518d\u5728\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u96c6\u4e2d\u5220\u9664\u8be5\u4fe1\u53f7\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5f53\u6240\u6709\u672a\u88ab\u5c4f\u853d\u7684\u4fe1\u53f7\u90fd\u5904\u7406\u5b8c\u6bd5\u540e\uff0c\u5373\u53ef\u8fd4\u56de\u7528\u6237\u7a7a\u95f4\u3002\u5bf9\u4e8e\u88ab\u5c4f\u853d\u7684\u4fe1\u53f7\uff0c\u5f53\u53d6\u6d88\u5c4f\u853d\u540e\uff0c\u5728\u8fd4\u56de\u5230\u7528\u6237\u7a7a\u95f4\u65f6\u4f1a\u518d\u6b21\u6267\u884c\u4e0a\u8ff0\u68c0\u67e5\u5904\u7406\u7684\u4e00\u5957\u6d41\u7a0b\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5185\u6838\u5904\u7406\u4e00\u4e2a\u8fdb\u7a0b\u6536\u5230\u7684\u4fe1\u53f7\u7684\u65f6\u673a\u662f\u5728\u4e00\u4e2a\u8fdb\u7a0b\u4ece\u5185\u6838\u6001\u8fd4\u56de\u7528\u6237\u6001\u65f6\u3002\u6240\u4ee5\uff0c\u5f53\u4e00\u4e2a\u8fdb\u7a0b\u5728\u5185\u6838\u6001\u4e0b\u8fd0\u884c\u65f6\uff0c\u8f6f\u4e2d\u65ad\u4fe1\u53f7\u5e76\u4e0d\u7acb\u5373\u8d77\u4f5c\u7528\uff0c\u8981\u7b49\u5230\u5c06\u8fd4\u56de\u7528\u6237\u6001\u65f6\u624d\u5904\u7406\u3002\u8fdb\u7a0b\u53ea\u6709\u5904\u7406\u5b8c\u4fe1\u53f7\u624d\u4f1a\u8fd4\u56de\u7528\u6237\u6001\uff0c\u8fdb\u7a0b\u5728\u7528\u6237\u6001\u4e0b\u4e0d\u4f1a\u6709\u672a\u5904\u7406\u5b8c\u7684\u4fe1\u53f7\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5904\u7406\u4fe1\u53f7\u6709\u4e09\u79cd\u7c7b\u578b\uff1a\u8fdb\u7a0b\u63a5\u6536\u5230\u4fe1\u53f7\u540e\u9000\u51fa\uff1b\u8fdb\u7a0b\u5ffd\u7565\u8be5\u4fe1\u53f7\uff1b\u8fdb\u7a0b\u6536\u5230\u4fe1\u53f7\u540e\u6267\u884c\u7528\u6237\u8bbe\u5b9a\u7528\u7cfb\u7edf\u8c03\u7528signal\u7684\u51fd\u6570\u3002\u5f53\u8fdb\u7a0b\u63a5\u6536\u5230\u4e00\u4e2a\u5b83\u5ffd\u7565\u7684\u4fe1\u53f7\u65f6\uff0c\u8fdb\u7a0b\u4e22\u5f03\u8be5\u4fe1\u53f7\uff0c\u5c31\u8c61\u6ca1\u6709\u6536\u5230\u8be5\u4fe1\u53f7\u4f3c\u7684\u7ee7\u7eed\u8fd0\u884c\u3002\u5982\u679c\u8fdb\u7a0b\u6536\u5230\u4e00\u4e2a\u8981\u6355\u6349\u7684\u4fe1\u53f7\uff0c\u90a3\u4e48\u8fdb\u7a0b\u4ece\u5185\u6838\u6001\u8fd4\u56de\u7528\u6237\u6001\u65f6\u6267\u884c\u7528\u6237\u5b9a\u4e49\u7684\u51fd\u6570\u3002\u800c\u4e14\u6267\u884c\u7528\u6237\u5b9a\u4e49\u7684\u51fd\u6570\u7684\u65b9\u6cd5\u5f88\u5de7\u5999\uff0c\u5185\u6838\u662f\u5728\u7528\u6237\u6808\u4e0a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5c42\uff0c\u8be5\u5c42\u4e2d\u5c06\u8fd4\u56de\u5730\u5740\u7684\u503c\u8bbe\u7f6e\u6210\u7528\u6237\u5b9a\u4e49\u7684\u5904\u7406\u51fd\u6570\u7684\u5730\u5740\uff0c\u8fd9\u6837\u8fdb\u7a0b\u4ece\u5185\u6838\u8fd4\u56de\u5f39\u51fa\u6808\u9876\u65f6\u5c31\u8fd4\u56de\u5230\u7528\u6237\u5b9a\u4e49\u7684\u51fd\u6570\u5904\uff0c\u4ece\u51fd\u6570\u8fd4\u56de\u518d\u5f39\u51fa\u6808\u9876\u65f6\uff0c\u624d\u8fd4\u56de\u539f\u5148\u8fdb\u5165\u5185\u6838\u7684\u5730\u65b9\u3002\u8fd9\u6837\u505a\u7684\u539f\u56e0\u662f\u7528\u6237\u5b9a\u4e49\u7684\u5904\u7406\u51fd\u6570\u4e0d\u80fd\u4e14\u4e0d\u5141\u8bb8\u5728\u5185\u6838\u6001\u4e0b\u6267\u884c\uff08\u5982\u679c\u7528\u6237\u5b9a\u4e49\u7684\u51fd\u6570\u5728\u5185\u6838\u6001\u4e0b\u8fd0\u884c\u7684\u8bdd\uff0c\u7528\u6237\u5c31\u53ef\u4ee5\u83b7\u5f97\u4efb\u4f55\u6743\u9650\uff09\u3002<\/p>\n<p>&nbsp;<\/p>\n<h1><a name=\"t8\"><\/a><a name=\"t8\"><\/a>4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u7684\u5b89\u88c5<\/h1>\n<p>\u5982\u679c\u8fdb\u7a0b\u8981\u5904\u7406\u67d0\u4e00\u4fe1\u53f7\uff0c\u90a3\u4e48\u5c31\u8981\u5728\u8fdb\u7a0b\u4e2d\u5b89\u88c5\u8be5\u4fe1\u53f7\u3002\u5b89\u88c5\u4fe1\u53f7\u4e3b\u8981\u7528\u6765\u786e\u5b9a\u4fe1\u53f7\u503c\u53ca\u8fdb\u7a0b\u9488\u5bf9\u8be5\u4fe1\u53f7\u503c\u7684\u52a8\u4f5c\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb\uff0c\u5373\u8fdb\u7a0b\u5c06\u8981\u5904\u7406\u54ea\u4e2a\u4fe1\u53f7\uff1b\u8be5\u4fe1\u53f7\u88ab\u4f20\u9012\u7ed9\u8fdb\u7a0b\u65f6\uff0c\u5c06\u6267\u884c\u4f55\u79cd\u64cd\u4f5c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>linux\u4e3b\u8981\u6709\u4e24\u4e2a\u51fd\u6570\u5b9e\u73b0\u4fe1\u53f7\u7684\u5b89\u88c5\uff1asignal()\u3001sigaction()\u3002\u5176\u4e2dsignal()\u53ea\u6709\u4e24\u4e2a\u53c2\u6570\uff0c\u4e0d\u652f\u6301\u4fe1\u53f7\u4f20\u9012\u4fe1\u606f\uff0c\u4e3b\u8981\u662f\u7528\u4e8e\u524d32\u79cd\u975e\u5b9e\u65f6\u4fe1\u53f7\u7684\u5b89\u88c5\uff1b\u800csigaction()\u662f\u8f83\u65b0\u7684\u51fd\u6570\uff08\u7531\u4e24\u4e2a\u7cfb\u7edf\u8c03\u7528\u5b9e\u73b0\uff1asys_signal\u4ee5\u53casys_rt_sigaction\uff09\uff0c\u6709\u4e09\u4e2a\u53c2\u6570\uff0c\u652f\u6301\u4fe1\u53f7\u4f20\u9012\u4fe1\u606f\uff0c\u4e3b\u8981\u7528\u6765\u4e0e sigqueue() \u7cfb\u7edf\u8c03\u7528\u914d\u5408\u4f7f\u7528\uff0c\u5f53\u7136\uff0csigaction()\u540c\u6837\u652f\u6301\u975e\u5b9e\u65f6\u4fe1\u53f7\u7684\u5b89\u88c5\u3002sigaction()\u4f18\u4e8esignal()\u4e3b\u8981\u4f53\u73b0\u5728\u652f\u6301\u4fe1\u53f7\u5e26\u6709\u53c2\u6570\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t9\"><\/a><a name=\"t9\"><\/a>4.1\u00a0\u00a0\u00a0\u00a0signal()<\/h2>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>void (*signal(int signum, void (*handler))(int)))(int);<\/p>\n<p>\u5982\u679c\u8be5\u51fd\u6570\u539f\u578b\u4e0d\u5bb9\u6613\u7406\u89e3\u7684\u8bdd\uff0c\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u7684\u5206\u89e3\u65b9\u5f0f\u6765\u7406\u89e3\uff1a<\/p>\n<p>typedef void (*sighandler_t)(int)\uff1b<\/p>\n<p>sighandler_t signal(int signum, sighandler_t handler));<\/p>\n<p>\u7b2c\u4e00\u4e2a\u53c2\u6570\u6307\u5b9a\u4fe1\u53f7\u7684\u503c\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6307\u5b9a\u9488\u5bf9\u524d\u9762\u4fe1\u53f7\u503c\u7684\u5904\u7406\uff0c\u53ef\u4ee5\u5ffd\u7565\u8be5\u4fe1\u53f7\uff08\u53c2\u6570\u8bbe\u4e3aSIG_IGN\uff09\uff1b\u53ef\u4ee5\u91c7\u7528\u7cfb\u7edf\u9ed8\u8ba4\u65b9\u5f0f\u5904\u7406\u4fe1\u53f7(\u53c2\u6570\u8bbe\u4e3aSIG_DFL)\uff1b\u4e5f\u53ef\u4ee5\u81ea\u5df1\u5b9e\u73b0\u5904\u7406\u65b9\u5f0f(\u53c2\u6570\u6307\u5b9a\u4e00\u4e2a\u51fd\u6570\u5730\u5740)\u3002<\/p>\n<p>\u5982\u679csignal()\u8c03\u7528\u6210\u529f\uff0c\u8fd4\u56de\u6700\u540e\u4e00\u6b21\u4e3a\u5b89\u88c5\u4fe1\u53f7signum\u800c\u8c03\u7528signal()\u65f6\u7684handler\u503c\uff1b\u5931\u8d25\u5219\u8fd4\u56deSIG_ERR\u3002<\/p>\n<p>\u4f20\u9012\u7ed9\u4fe1\u53f7\u5904\u7406\u4f8b\u7a0b\u7684\u6574\u6570\u53c2\u6570\u662f\u4fe1\u53f7\u503c\uff0c\u8fd9\u6837\u53ef\u4ee5\u4f7f\u5f97\u4e00\u4e2a\u4fe1\u53f7\u5904\u7406\u4f8b\u7a0b\u5904\u7406\u591a\u4e2a\u4fe1\u53f7\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>#include &lt;unistd.h&gt;<\/p>\n<p>#include &lt;stdio.h&gt;<\/p>\n<p>void sigroutine(int dunno)<\/p>\n<p>{ \/* \u4fe1\u53f7\u5904\u7406\u4f8b\u7a0b\uff0c\u5176\u4e2ddunno\u5c06\u4f1a\u5f97\u5230\u4fe1\u53f7\u7684\u503c *\/<\/p>\n<p>switch (dunno) {<\/p>\n<p>case 1:<\/p>\n<p>printf(&#8220;Get a signal &#8212; SIGHUP &#8220;);<\/p>\n<p>break;<\/p>\n<p>case 2:<\/p>\n<p>printf(&#8220;Get a signal &#8212; SIGINT &#8220;);<\/p>\n<p>break;<\/p>\n<p>case 3:<\/p>\n<p>printf(&#8220;Get a signal &#8212; SIGQUIT &#8220;);<\/p>\n<p>break;<\/p>\n<p>}<\/p>\n<p>return;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>int main() {<\/p>\n<p>printf(&#8220;process id is %d &#8220;,getpid());<\/p>\n<p>signal(SIGHUP, sigroutine); \/\/* \u4e0b\u9762\u8bbe\u7f6e\u4e09\u4e2a\u4fe1\u53f7\u7684\u5904\u7406\u65b9\u6cd5<\/p>\n<p>signal(SIGINT, sigroutine);<\/p>\n<p>signal(SIGQUIT, sigroutine);<\/p>\n<p>for (;;) ;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>\u5176\u4e2d\u4fe1\u53f7SIGINT\u7531\u6309\u4e0bCtrl-C\u53d1\u51fa\uff0c\u4fe1\u53f7SIGQUIT\u7531\u6309\u4e0bCtrl-\u53d1\u51fa\u3002\u8be5\u7a0b\u5e8f\u6267\u884c\u7684\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>localhost:~$ .\/sig_test<\/p>\n<p>process id is 463<\/p>\n<p>Get a signal -SIGINT \/\/\u6309\u4e0bCtrl-C\u5f97\u5230\u7684\u7ed3\u679c<\/p>\n<p>Get a signal -SIGQUIT \/\/\u6309\u4e0bCtrl-\u5f97\u5230\u7684\u7ed3\u679c<\/p>\n<p>\/\/\u6309\u4e0bCtrl-z\u5c06\u8fdb\u7a0b\u7f6e\u4e8e\u540e\u53f0<\/p>\n<p>[1]+ Stopped .\/sig_test<\/p>\n<p>localhost:~$ bg<\/p>\n<p>[1]+ .\/sig_test &amp;<\/p>\n<p>localhost:~$ kill -HUP 463 \/\/\u5411\u8fdb\u7a0b\u53d1\u9001SIGHUP\u4fe1\u53f7<\/p>\n<p>localhost:~$ Get a signal \u2013 SIGHUP<\/p>\n<p>kill -9 463 \/\/\u5411\u8fdb\u7a0b\u53d1\u9001SIGKILL\u4fe1\u53f7\uff0c\u7ec8\u6b62\u8fdb\u7a0b<\/p>\n<p>localhost:~$<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t10\"><\/a><a name=\"t10\"><\/a>4.2\u00a0\u00a0\u00a0\u00a0sigaction()<\/h2>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>int sigaction(int signum,const\u00a0struct sigaction *act,struct sigaction *oldact));<\/p>\n<p>sigaction\u51fd\u6570\u7528\u4e8e\u6539\u53d8\u8fdb\u7a0b\u63a5\u6536\u5230\u7279\u5b9a\u4fe1\u53f7\u540e\u7684\u884c\u4e3a\u3002\u8be5\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\u4fe1\u53f7\u7684\u503c\uff0c\u53ef\u4ee5\u4e3a\u9664SIGKILL\u53caSIGSTOP\u5916\u7684\u4efb\u4f55\u4e00\u4e2a\u7279\u5b9a\u6709\u6548\u7684\u4fe1\u53f7\uff08\u4e3a\u8fd9\u4e24\u4e2a\u4fe1\u53f7\u5b9a\u4e49\u81ea\u5df1\u7684\u5904\u7406\u51fd\u6570\uff0c\u5c06\u5bfc\u81f4\u4fe1\u53f7\u5b89\u88c5\u9519\u8bef\uff09\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u6307\u5411\u7ed3\u6784sigaction\u7684\u4e00\u4e2a\u5b9e\u4f8b\u7684\u6307\u9488\uff0c\u5728\u7ed3\u6784sigaction\u7684\u5b9e\u4f8b\u4e2d\uff0c\u6307\u5b9a\u4e86\u5bf9\u7279\u5b9a\u4fe1\u53f7\u7684\u5904\u7406\uff0c\u53ef\u4ee5\u4e3a\u7a7a\uff0c\u8fdb\u7a0b\u4f1a\u4ee5\u7f3a\u7701\u65b9\u5f0f\u5bf9\u4fe1\u53f7\u5904\u7406\uff1b\u7b2c\u4e09\u4e2a\u53c2\u6570oldact\u6307\u5411\u7684\u5bf9\u8c61\u7528\u6765\u4fdd\u5b58\u8fd4\u56de\u7684\u539f\u6765\u5bf9\u76f8\u5e94\u4fe1\u53f7\u7684\u5904\u7406\uff0c\u53ef\u6307\u5b9aoldact\u4e3aNULL\u3002\u5982\u679c\u628a\u7b2c\u4e8c\u3001\u7b2c\u4e09\u4e2a\u53c2\u6570\u90fd\u8bbe\u4e3aNULL\uff0c\u90a3\u4e48\u8be5\u51fd\u6570\u53ef\u7528\u4e8e\u68c0\u67e5\u4fe1\u53f7\u7684\u6709\u6548\u6027\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6700\u4e3a\u91cd\u8981\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u5bf9\u6307\u5b9a\u4fe1\u53f7\u7684\u5904\u7406\u3001\u4fe1\u53f7\u6240\u4f20\u9012\u7684\u4fe1\u606f\u3001\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u6267\u884c\u8fc7\u7a0b\u4e2d\u5e94\u5c4f\u853d\u6389\u54ea\u4e9b\u4fe1\u53f7\u7b49\u7b49\u3002<\/p>\n<p>sigaction\u7ed3\u6784\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n<p>struct sigaction {<\/p>\n<p>union{<\/p>\n<p>__sighandler_t _sa_handler;<\/p>\n<p>void (*_sa_sigaction)(int,struct siginfo *, void *)\uff1b<\/p>\n<p>}_u<\/p>\n<p>sigset_t sa_mask\uff1b<\/p>\n<p>unsigned long sa_flags\uff1b<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>1\u3001\u8054\u5408\u6570\u636e\u7ed3\u6784\u4e2d\u7684\u4e24\u4e2a\u5143\u7d20_sa_handler\u4ee5\u53ca*_sa_sigaction\u6307\u5b9a\u4fe1\u53f7\u5173\u8054\u51fd\u6570\uff0c\u5373\u7528\u6237\u6307\u5b9a\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002\u9664\u4e86\u53ef\u4ee5\u662f\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u5904\u7406\u51fd\u6570\u5916\uff0c\u8fd8\u53ef\u4ee5\u4e3aSIG_DFL(\u91c7\u7528\u7f3a\u7701\u7684\u5904\u7406\u65b9\u5f0f)\uff0c\u4e5f\u53ef\u4ee5\u4e3aSIG_IGN\uff08\u5ffd\u7565\u4fe1\u53f7\uff09\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>2\u3001\u7531_sa_sigaction\u662f\u6307\u5b9a\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u5e26\u6709\u4e09\u4e2a\u53c2\u6570\uff0c\u662f\u4e3a\u5b9e\u65f6\u4fe1\u53f7\u800c\u8bbe\u7684\uff08\u5f53\u7136\u540c\u6837\u652f\u6301\u975e\u5b9e\u65f6\u4fe1\u53f7\uff09\uff0c\u5b83\u6307\u5b9a\u4e00\u4e2a3\u53c2\u6570\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\u4fe1\u53f7\u503c\uff0c\u7b2c\u4e09\u4e2a\u53c2\u6570\u6ca1\u6709\u4f7f\u7528\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u6307\u5411siginfo_t\u7ed3\u6784\u7684\u6307\u9488\uff0c\u7ed3\u6784\u4e2d\u5305\u542b\u4fe1\u53f7\u643a\u5e26\u7684\u6570\u636e\u503c\uff0c\u53c2\u6570\u6240\u6307\u5411\u7684\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<p>siginfo_t {<\/p>\n<p>int\u00a0\u00a0\u00a0\u00a0\u00a0 si_signo;\u00a0 \/* \u4fe1\u53f7\u503c\uff0c\u5bf9\u6240\u6709\u4fe1\u53f7\u6709\u610f\u4e49*\/<\/p>\n<p>int\u00a0\u00a0\u00a0\u00a0\u00a0 si_errno;\u00a0 \/* errno\u503c\uff0c\u5bf9\u6240\u6709\u4fe1\u53f7\u6709\u610f\u4e49*\/<\/p>\n<p>int\u00a0\u00a0\u00a0\u00a0\u00a0 si_code;\u00a0\u00a0 \/* \u4fe1\u53f7\u4ea7\u751f\u7684\u539f\u56e0\uff0c\u5bf9\u6240\u6709\u4fe1\u53f7\u6709\u610f\u4e49*\/<\/p>\n<p>union{\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0 \/* \u8054\u5408\u6570\u636e\u7ed3\u6784\uff0c\u4e0d\u540c\u6210\u5458\u9002\u5e94\u4e0d\u540c\u4fe1\u53f7 *\/<\/p>\n<p>\/\/\u786e\u4fdd\u5206\u914d\u8db3\u591f\u5927\u7684\u5b58\u50a8\u7a7a\u95f4<\/p>\n<p>int _pad[SI_PAD_SIZE];<\/p>\n<p>\/\/\u5bf9SIGKILL\u6709\u610f\u4e49\u7684\u7ed3\u6784<\/p>\n<p>struct{<\/p>\n<p>&#8230;<\/p>\n<p>}&#8230;<\/p>\n<p>&#8230; &#8230;<\/p>\n<p>&#8230; &#8230;<\/p>\n<p>\/\/\u5bf9SIGILL, SIGFPE, SIGSEGV, SIGBUS\u6709\u610f\u4e49\u7684\u7ed3\u6784<\/p>\n<p>struct{<\/p>\n<p>&#8230;<\/p>\n<p>}&#8230;<\/p>\n<p>&#8230; &#8230;<\/p>\n<p>}<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>\u524d\u9762\u5728\u8ba8\u8bba\u7cfb\u7edf\u8c03\u7528sigqueue\u53d1\u9001\u4fe1\u53f7\u65f6\uff0csigqueue\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570\u5c31\u662fsigval\u8054\u5408\u6570\u636e\u7ed3\u6784\uff0c\u5f53\u8c03\u7528sigqueue\u65f6\uff0c\u8be5\u6570\u636e\u7ed3\u6784\u4e2d\u7684\u6570\u636e\u5c31\u5c06\u62f7\u8d1d\u5230\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e2d\u3002\u8fd9\u6837\uff0c\u5728\u53d1\u9001\u4fe1\u53f7\u540c\u65f6\uff0c\u5c31\u53ef\u4ee5\u8ba9\u4fe1\u53f7\u4f20\u9012\u4e00\u4e9b\u9644\u52a0\u4fe1\u606f\u3002\u4fe1\u53f7\u53ef\u4ee5\u4f20\u9012\u4fe1\u606f\u5bf9\u7a0b\u5e8f\u5f00\u53d1\u662f\u975e\u5e38\u6709\u610f\u4e49\u7684\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>3\u3001sa_mask\u6307\u5b9a\u5728\u4fe1\u53f7\u5904\u7406\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u54ea\u4e9b\u4fe1\u53f7\u5e94\u5f53\u88ab\u963b\u585e\u3002\u7f3a\u7701\u60c5\u51b5\u4e0b\u5f53\u524d\u4fe1\u53f7\u672c\u8eab\u88ab\u963b\u585e\uff0c\u9632\u6b62\u4fe1\u53f7\u7684\u5d4c\u5957\u53d1\u9001\uff0c\u9664\u975e\u6307\u5b9aSA_NODEFER\u6216\u8005SA_NOMASK\u6807\u5fd7\u4f4d\u3002<\/p>\n<p>\u6ce8\uff1a\u8bf7\u6ce8\u610fsa_mask\u6307\u5b9a\u7684\u4fe1\u53f7\u963b\u585e\u7684\u524d\u63d0\u6761\u4ef6\uff0c\u662f\u5728\u7531sigaction\uff08\uff09\u5b89\u88c5\u4fe1\u53f7\u7684\u5904\u7406\u51fd\u6570\u6267\u884c\u8fc7\u7a0b\u4e2d\u7531sa_mask\u6307\u5b9a\u7684\u4fe1\u53f7\u624d\u88ab\u963b\u585e\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>4\u3001sa_flags\u4e2d\u5305\u542b\u4e86\u8bb8\u591a\u6807\u5fd7\u4f4d\uff0c\u5305\u62ec\u521a\u521a\u63d0\u5230\u7684SA_NODEFER\u53caSA_NOMASK\u6807\u5fd7\u4f4d\u3002\u53e6\u4e00\u4e2a\u6bd4\u8f83\u91cd\u8981\u7684\u6807\u5fd7\u4f4d\u662fSA_SIGINFO\uff0c\u5f53\u8bbe\u5b9a\u4e86\u8be5\u6807\u5fd7\u4f4d\u65f6\uff0c\u8868\u793a\u4fe1\u53f7\u9644\u5e26\u7684\u53c2\u6570\u53ef\u4ee5\u88ab\u4f20\u9012\u5230\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u4e2d\uff0c\u56e0\u6b64\uff0c\u5e94\u8be5\u4e3asigaction\u7ed3\u6784\u4e2d\u7684sa_sigaction\u6307\u5b9a\u5904\u7406\u51fd\u6570\uff0c\u800c\u4e0d\u5e94\u8be5\u4e3asa_handler\u6307\u5b9a\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0c\u5426\u5219\uff0c\u8bbe\u7f6e\u8be5\u6807\u5fd7\u53d8\u5f97\u6beb\u65e0\u610f\u4e49\u3002\u5373\u4f7f\u4e3asa_sigaction\u6307\u5b9a\u4e86\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0c\u5982\u679c\u4e0d\u8bbe\u7f6eSA_SIGINFO\uff0c\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u540c\u6837\u4e0d\u80fd\u5f97\u5230\u4fe1\u53f7\u4f20\u9012\u8fc7\u6765\u7684\u6570\u636e\uff0c\u5728\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u4e2d\u5bf9\u8fd9\u4e9b\u4fe1\u606f\u7684\u8bbf\u95ee\u90fd\u5c06\u5bfc\u81f4\u6bb5\u9519\u8bef\uff08Segmentation fault\uff09\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h1><a name=\"t11\"><\/a><a name=\"t11\"><\/a>5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u7684\u53d1\u9001<\/h1>\n<p>\u53d1\u9001\u4fe1\u53f7\u7684\u4e3b\u8981\u51fd\u6570\u6709\uff1akill()\u3001raise()\u3001 sigqueue()\u3001alarm()\u3001setitimer()\u4ee5\u53caabort()\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t12\"><\/a><a name=\"t12\"><\/a>5.1\u00a0\u00a0\u00a0\u00a0kill()<\/h2>\n<p>#include &lt;sys\/types.h&gt;<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>int kill(pid_t pid,int signo)<\/p>\n<p>&nbsp;<\/p>\n<p>\u8be5\u7cfb\u7edf\u8c03\u7528\u53ef\u4ee5\u7528\u6765\u5411\u4efb\u4f55\u8fdb\u7a0b\u6216\u8fdb\u7a0b\u7ec4\u53d1\u9001\u4efb\u4f55\u4fe1\u53f7\u3002\u53c2\u6570pid\u7684\u503c\u4e3a\u4fe1\u53f7\u7684\u63a5\u6536\u8fdb\u7a0b<\/p>\n<p>pid&gt;0 \u8fdb\u7a0bID\u4e3apid\u7684\u8fdb\u7a0b<\/p>\n<p>pid=0 \u540c\u4e00\u4e2a\u8fdb\u7a0b\u7ec4\u7684\u8fdb\u7a0b<\/p>\n<p>pid&lt;0 pid!=-1 \u8fdb\u7a0b\u7ec4ID\u4e3a -pid\u7684\u6240\u6709\u8fdb\u7a0b<\/p>\n<p>pid=-1 \u9664\u53d1\u9001\u8fdb\u7a0b\u81ea\u8eab\u5916\uff0c\u6240\u6709\u8fdb\u7a0bID\u5927\u4e8e1\u7684\u8fdb\u7a0b<\/p>\n<p>&nbsp;<\/p>\n<p>Sinno\u662f\u4fe1\u53f7\u503c\uff0c\u5f53\u4e3a0\u65f6\uff08\u5373\u7a7a\u4fe1\u53f7\uff09\uff0c\u5b9e\u9645\u4e0d\u53d1\u9001\u4efb\u4f55\u4fe1\u53f7\uff0c\u4f46\u7167\u5e38\u8fdb\u884c\u9519\u8bef\u68c0\u67e5\uff0c\u56e0\u6b64\uff0c\u53ef\u7528\u4e8e\u68c0\u67e5\u76ee\u6807\u8fdb\u7a0b\u662f\u5426\u5b58\u5728\uff0c\u4ee5\u53ca\u5f53\u524d\u8fdb\u7a0b\u662f\u5426\u5177\u6709\u5411\u76ee\u6807\u53d1\u9001\u4fe1\u53f7\u7684\u6743\u9650\uff08root\u6743\u9650\u7684\u8fdb\u7a0b\u53ef\u4ee5\u5411\u4efb\u4f55\u8fdb\u7a0b\u53d1\u9001\u4fe1\u53f7\uff0c\u975eroot\u6743\u9650\u7684\u8fdb\u7a0b\u53ea\u80fd\u5411\u5c5e\u4e8e\u540c\u4e00\u4e2asession\u6216\u8005\u540c\u4e00\u4e2a\u7528\u6237\u7684\u8fdb\u7a0b\u53d1\u9001\u4fe1\u53f7\uff09\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>Kill()\u6700\u5e38\u7528\u4e8epid&gt;0\u65f6\u7684\u4fe1\u53f7\u53d1\u9001\u3002\u8be5\u8c03\u7528\u6267\u884c\u6210\u529f\u65f6\uff0c\u8fd4\u56de\u503c\u4e3a0\uff1b\u9519\u8bef\u65f6\uff0c\u8fd4\u56de-1\uff0c\u5e76\u8bbe\u7f6e\u76f8\u5e94\u7684\u9519\u8bef\u4ee3\u7801errno\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u53ef\u80fd\u8fd4\u56de\u7684\u9519\u8bef\u4ee3\u7801\uff1a<\/p>\n<p>EINVAL\uff1a\u6307\u5b9a\u7684\u4fe1\u53f7sig\u65e0\u6548\u3002<\/p>\n<p>ESRCH\uff1a\u53c2\u6570pid\u6307\u5b9a\u7684\u8fdb\u7a0b\u6216\u8fdb\u7a0b\u7ec4\u4e0d\u5b58\u5728\u3002\u6ce8\u610f\uff0c\u5728\u8fdb\u7a0b\u8868\u9879\u4e2d\u5b58\u5728\u7684\u8fdb\u7a0b\uff0c\u53ef\u80fd\u662f\u4e00\u4e2a\u8fd8\u6ca1\u6709\u88abwait\u6536\u56de\uff0c\u4f46\u5df2\u7ecf\u7ec8\u6b62\u6267\u884c\u7684\u50f5\u6b7b\u8fdb\u7a0b\u3002<\/p>\n<p>EPERM\uff1a\u00a0\u8fdb\u7a0b\u6ca1\u6709\u6743\u529b\u5c06\u8fd9\u4e2a\u4fe1\u53f7\u53d1\u9001\u5230\u6307\u5b9a\u63a5\u6536\u4fe1\u53f7\u7684\u8fdb\u7a0b\u3002\u56e0\u4e3a\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u88ab\u5141\u8bb8\u5c06\u4fe1\u53f7\u53d1\u9001\u5230\u8fdb\u7a0bpid\u65f6\uff0c\u5fc5\u987b\u62e5\u6709root\u6743\u529b\uff0c\u6216\u8005\u662f\u53d1\u51fa\u8c03\u7528\u7684\u8fdb\u7a0b\u7684UID \u6216EUID\u4e0e\u6307\u5b9a\u63a5\u6536\u7684\u8fdb\u7a0b\u7684UID\u6216\u4fdd\u5b58\u7528\u6237ID\uff08savedset-user-ID\uff09\u76f8\u540c\u3002\u5982\u679c\u53c2\u6570pid\u5c0f\u4e8e-1\uff0c\u5373\u8be5\u4fe1\u53f7\u53d1\u9001\u7ed9\u4e00\u4e2a\u7ec4\uff0c\u5219\u8be5\u9519\u8bef\u8868\u793a\u7ec4\u4e2d\u6709\u6210\u5458\u8fdb\u7a0b\u4e0d\u80fd\u63a5\u6536\u8be5\u4fe1\u53f7\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t13\"><\/a><a name=\"t13\"><\/a>5.2\u00a0\u00a0\u00a0\u00a0sigqueue\uff08\uff09<\/h2>\n<p>#include &lt;sys\/types.h&gt;<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>int sigqueue(pid_t pid, int sig,\u00a0const union sigval val)<\/p>\n<p>\u8c03\u7528\u6210\u529f\u8fd4\u56de 0\uff1b\u5426\u5219\uff0c\u8fd4\u56de -1\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>sigqueue()\u662f\u6bd4\u8f83\u65b0\u7684\u53d1\u9001\u4fe1\u53f7\u7cfb\u7edf\u8c03\u7528\uff0c\u4e3b\u8981\u662f\u9488\u5bf9\u5b9e\u65f6\u4fe1\u53f7\u63d0\u51fa\u7684\uff08\u5f53\u7136\u4e5f\u652f\u6301\u524d32\u79cd\uff09\uff0c\u652f\u6301\u4fe1\u53f7\u5e26\u6709\u53c2\u6570\uff0c\u4e0e\u51fd\u6570sigaction()\u914d\u5408\u4f7f\u7528\u3002<\/p>\n<p>sigqueue\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u6307\u5b9a\u63a5\u6536\u4fe1\u53f7\u7684\u8fdb\u7a0bID\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u786e\u5b9a\u5373\u5c06\u53d1\u9001\u7684\u4fe1\u53f7\uff0c\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u8054\u5408\u6570\u636e\u7ed3\u6784union sigval\uff0c\u6307\u5b9a\u4e86\u4fe1\u53f7\u4f20\u9012\u7684\u53c2\u6570\uff0c\u5373\u901a\u5e38\u6240\u8bf4\u76844\u5b57\u8282\u503c\u3002<\/p>\n<p>typedef union sigval {<\/p>\n<p>int\u00a0 sival_int;<\/p>\n<p>void *sival_ptr;<\/p>\n<p>}sigval_t;<\/p>\n<p>&nbsp;<\/p>\n<p>sigqueue()\u6bd4kill()\u4f20\u9012\u4e86\u66f4\u591a\u7684\u9644\u52a0\u4fe1\u606f\uff0c\u4f46sigqueue()\u53ea\u80fd\u5411\u4e00\u4e2a\u8fdb\u7a0b\u53d1\u9001\u4fe1\u53f7\uff0c\u800c\u4e0d\u80fd\u53d1\u9001\u4fe1\u53f7\u7ed9\u4e00\u4e2a\u8fdb\u7a0b\u7ec4\u3002\u5982\u679csigno=0\uff0c\u5c06\u4f1a\u6267\u884c\u9519\u8bef\u68c0\u67e5\uff0c\u4f46\u5b9e\u9645\u4e0a\u4e0d\u53d1\u9001\u4efb\u4f55\u4fe1\u53f7\uff0c0\u503c\u4fe1\u53f7\u53ef\u7528\u4e8e\u68c0\u67e5pid\u7684\u6709\u6548\u6027\u4ee5\u53ca\u5f53\u524d\u8fdb\u7a0b\u662f\u5426\u6709\u6743\u9650\u5411\u76ee\u6807\u8fdb\u7a0b\u53d1\u9001\u4fe1\u53f7\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u8c03\u7528sigqueue\u65f6\uff0csigval_t\u6307\u5b9a\u7684\u4fe1\u606f\u4f1a\u62f7\u8d1d\u5230\u5bf9\u5e94sig \u6ce8\u518c\u76843\u53c2\u6570\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u7684siginfo_t\u7ed3\u6784\u4e2d\uff0c\u8fd9\u6837\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u5c31\u53ef\u4ee5\u5904\u7406\u8fd9\u4e9b\u4fe1\u606f\u4e86\u3002\u7531\u4e8esigqueue\u7cfb\u7edf\u8c03\u7528\u652f\u6301\u53d1\u9001\u5e26\u53c2\u6570\u4fe1\u53f7\uff0c\u6240\u4ee5\u6bd4kill()\u7cfb\u7edf\u8c03\u7528\u7684\u529f\u80fd\u8981\u7075\u6d3b\u548c\u5f3a\u5927\u5f97\u591a\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t14\"><\/a><a name=\"t14\"><\/a>5.3\u00a0\u00a0\u00a0\u00a0alarm\uff08\uff09<\/h2>\n<p>#include &lt;unistd.h&gt;<\/p>\n<p>unsigned int alarm(unsigned int seconds)<\/p>\n<p>\u7cfb\u7edf\u8c03\u7528alarm\u5b89\u6392\u5185\u6838\u4e3a\u8c03\u7528\u8fdb\u7a0b\u5728\u6307\u5b9a\u7684seconds\u79d2\u540e\u53d1\u51fa\u4e00\u4e2aSIGALRM\u7684\u4fe1\u53f7\u3002\u5982\u679c\u6307\u5b9a\u7684\u53c2\u6570seconds\u4e3a0\uff0c\u5219\u4e0d\u518d\u53d1\u9001 SIGALRM\u4fe1\u53f7\u3002\u540e\u4e00\u6b21\u8bbe\u5b9a\u5c06\u53d6\u6d88\u524d\u4e00\u6b21\u7684\u8bbe\u5b9a\u3002\u8be5\u8c03\u7528\u8fd4\u56de\u503c\u4e3a\u4e0a\u6b21\u5b9a\u65f6\u8c03\u7528\u5230\u53d1\u9001\u4e4b\u95f4\u5269\u4f59\u7684\u65f6\u95f4\uff0c\u6216\u8005\u56e0\u4e3a\u6ca1\u6709\u524d\u4e00\u6b21\u5b9a\u65f6\u8c03\u7528\u800c\u8fd4\u56de0\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6ce8\u610f\uff0c\u5728\u4f7f\u7528\u65f6\uff0calarm\u53ea\u8bbe\u5b9a\u4e3a\u53d1\u9001\u4e00\u6b21\u4fe1\u53f7\uff0c\u5982\u679c\u8981\u591a\u6b21\u53d1\u9001\uff0c\u5c31\u8981\u591a\u6b21\u4f7f\u7528alarm\u8c03\u7528\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t15\"><\/a><a name=\"t15\"><\/a>5.4\u00a0\u00a0\u00a0\u00a0setitimer\uff08\uff09<\/h2>\n<p>\u73b0\u5728\u7684\u7cfb\u7edf\u4e2d\u5f88\u591a\u7a0b\u5e8f\u4e0d\u518d\u4f7f\u7528alarm\u8c03\u7528\uff0c\u800c\u662f\u4f7f\u7528setitimer\u8c03\u7528\u6765\u8bbe\u7f6e\u5b9a\u65f6\u5668\uff0c\u7528getitimer\u6765\u5f97\u5230\u5b9a\u65f6\u5668\u7684\u72b6\u6001\uff0c\u8fd9\u4e24\u4e2a\u8c03\u7528\u7684\u58f0\u660e\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<p>int getitimer(int which, struct itimerval *value);<\/p>\n<p>int setitimer(int which, const struct itimerval *value, struct itimerval *ovalue);<\/p>\n<p>\u5728\u4f7f\u7528\u8fd9\u4e24\u4e2a\u8c03\u7528\u7684\u8fdb\u7a0b\u4e2d\u52a0\u5165\u4ee5\u4e0b\u5934\u6587\u4ef6\uff1a<\/p>\n<p>#include &lt;sys\/time.h&gt;<\/p>\n<p>&nbsp;<\/p>\n<p>\u8be5\u7cfb\u7edf\u8c03\u7528\u7ed9\u8fdb\u7a0b\u63d0\u4f9b\u4e86\u4e09\u4e2a\u5b9a\u65f6\u5668\uff0c\u5b83\u4eec\u5404\u81ea\u6709\u5176\u72ec\u6709\u7684\u8ba1\u65f6\u57df\uff0c\u5f53\u5176\u4e2d\u4efb\u4f55\u4e00\u4e2a\u5230\u8fbe\uff0c\u5c31\u53d1\u9001\u4e00\u4e2a\u76f8\u5e94\u7684\u4fe1\u53f7\u7ed9\u8fdb\u7a0b\uff0c\u5e76\u4f7f\u5f97\u8ba1\u65f6\u5668\u91cd\u65b0\u5f00\u59cb\u3002\u4e09\u4e2a\u8ba1\u65f6\u5668\u7531\u53c2\u6570which\u6307\u5b9a\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<p>TIMER_REAL\uff1a\u6309\u5b9e\u9645\u65f6\u95f4\u8ba1\u65f6\uff0c\u8ba1\u65f6\u5230\u8fbe\u5c06\u7ed9\u8fdb\u7a0b\u53d1\u9001SIGALRM\u4fe1\u53f7\u3002<\/p>\n<p>ITIMER_VIRTUAL\uff1a\u4ec5\u5f53\u8fdb\u7a0b\u6267\u884c\u65f6\u624d\u8fdb\u884c\u8ba1\u65f6\u3002\u8ba1\u65f6\u5230\u8fbe\u5c06\u53d1\u9001SIGVTALRM\u4fe1\u53f7\u7ed9\u8fdb\u7a0b\u3002<\/p>\n<p>ITIMER_PROF\uff1a\u5f53\u8fdb\u7a0b\u6267\u884c\u65f6\u548c\u7cfb\u7edf\u4e3a\u8be5\u8fdb\u7a0b\u6267\u884c\u52a8\u4f5c\u65f6\u90fd\u8ba1\u65f6\u3002\u4e0eITIMER_VIR-TUAL\u662f\u4e00\u5bf9\uff0c\u8be5\u5b9a\u65f6\u5668\u7ecf\u5e38\u7528\u6765\u7edf\u8ba1\u8fdb\u7a0b\u5728\u7528\u6237\u6001\u548c\u5185\u6838\u6001\u82b1\u8d39\u7684\u65f6\u95f4\u3002\u8ba1\u65f6\u5230\u8fbe\u5c06\u53d1\u9001SIGPROF\u4fe1\u53f7\u7ed9\u8fdb\u7a0b\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5b9a\u65f6\u5668\u4e2d\u7684\u53c2\u6570value\u7528\u6765\u6307\u660e\u5b9a\u65f6\u5668\u7684\u65f6\u95f4\uff0c\u5176\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<p>struct itimerval {<\/p>\n<p>struct timeval it_interval; \/* \u4e0b\u4e00\u6b21\u7684\u53d6\u503c *\/<\/p>\n<p>struct timeval it_value; \/* \u672c\u6b21\u7684\u8bbe\u5b9a\u503c *\/<\/p>\n<p>};<\/p>\n<p>&nbsp;<\/p>\n<p>\u8be5\u7ed3\u6784\u4e2dtimeval\u7ed3\u6784\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n<p>struct timeval {<\/p>\n<p>long tv_sec; \/* \u79d2 *\/<\/p>\n<p>long tv_usec; \/* \u5fae\u79d2\uff0c1\u79d2 = 1000000 \u5fae\u79d2*\/<\/p>\n<p>};<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728setitimer \u8c03\u7528\u4e2d\uff0c\u53c2\u6570ovalue\u5982\u679c\u4e0d\u4e3a\u7a7a\uff0c\u5219\u5176\u4e2d\u4fdd\u7559\u7684\u662f\u4e0a\u6b21\u8c03\u7528\u8bbe\u5b9a\u7684\u503c\u3002\u5b9a\u65f6\u5668\u5c06it_value\u9012\u51cf\u52300\u65f6\uff0c\u4ea7\u751f\u4e00\u4e2a\u4fe1\u53f7\uff0c\u5e76\u5c06it_value\u7684\u503c\u8bbe\u5b9a\u4e3ait_interval\u7684\u503c\uff0c\u7136\u540e\u91cd\u65b0\u5f00\u59cb\u8ba1\u65f6\uff0c\u5982\u6b64\u5f80\u590d\u3002\u5f53it_value\u8bbe\u5b9a\u4e3a0\u65f6\uff0c\u8ba1\u65f6\u5668\u505c\u6b62\uff0c\u6216\u8005\u5f53\u5b83\u8ba1\u65f6\u5230\u671f\uff0c\u800cit_interval \u4e3a0\u65f6\u505c\u6b62\u3002\u8c03\u7528\u6210\u529f\u65f6\uff0c\u8fd4\u56de0\uff1b\u9519\u8bef\u65f6\uff0c\u8fd4\u56de-1\uff0c\u5e76\u8bbe\u7f6e\u76f8\u5e94\u7684\u9519\u8bef\u4ee3\u7801errno\uff1a<\/p>\n<p>EFAULT\uff1a\u53c2\u6570value\u6216ovalue\u662f\u65e0\u6548\u7684\u6307\u9488\u3002<\/p>\n<p>EINVAL\uff1a\u53c2\u6570which\u4e0d\u662fITIMER_REAL\u3001ITIMER_VIRT\u6216ITIMER_PROF\u4e2d\u7684\u4e00\u4e2a\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u5173\u4e8esetitimer\u8c03\u7528\u7684\u4e00\u4e2a\u7b80\u5355\u793a\u8303\uff0c\u5728\u8be5\u4f8b\u5b50\u4e2d\uff0c\u6bcf\u9694\u4e00\u79d2\u53d1\u51fa\u4e00\u4e2aSIGALRM\uff0c\u6bcf\u96940.5\u79d2\u53d1\u51fa\u4e00\u4e2aSIGVTALRM\u4fe1\u53f7\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>#include &lt;unistd.h&gt;<\/p>\n<p>#include &lt;stdio.h&gt;<\/p>\n<p>#include &lt;sys\/time.h&gt;<\/p>\n<p>int sec;<\/p>\n<p>&nbsp;<\/p>\n<p>void sigroutine(int signo) {<\/p>\n<p>switch (signo) {<\/p>\n<p>case SIGALRM:<\/p>\n<p>printf(&#8220;Catch a signal &#8212; SIGALRM &#8220;);<\/p>\n<p>break;<\/p>\n<p>case SIGVTALRM:<\/p>\n<p>printf(&#8220;Catch a signal &#8212; SIGVTALRM &#8220;);<\/p>\n<p>break;<\/p>\n<p>}<\/p>\n<p>return;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>int main()<\/p>\n<p>{<\/p>\n<p>struct itimerval value,ovalue,value2;<\/p>\n<p>sec = 5;<\/p>\n<p>&nbsp;<\/p>\n<p>printf(&#8220;process id is %d &#8220;,getpid());<\/p>\n<p>signal(SIGALRM, sigroutine);<\/p>\n<p>signal(SIGVTALRM, sigroutine);<\/p>\n<p>&nbsp;<\/p>\n<p>value.it_value.tv_sec = 1;<\/p>\n<p>value.it_value.tv_usec = 0;<\/p>\n<p>value.it_interval.tv_sec = 1;<\/p>\n<p>value.it_interval.tv_usec = 0;<\/p>\n<p>setitimer(ITIMER_REAL, &amp;value, &amp;ovalue);<\/p>\n<p>&nbsp;<\/p>\n<p>value2.it_value.tv_sec = 0;<\/p>\n<p>value2.it_value.tv_usec = 500000;<\/p>\n<p>value2.it_interval.tv_sec = 0;<\/p>\n<p>value2.it_interval.tv_usec = 500000;<\/p>\n<p>setitimer(ITIMER_VIRTUAL, &amp;value2, &amp;ovalue);<\/p>\n<p>&nbsp;<\/p>\n<p>for (;;) ;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>\u8be5\u4f8b\u5b50\u7684\u5c4f\u5e55\u62f7\u8d1d\u5982\u4e0b\uff1a<\/p>\n<p>localhost:~$ .\/timer_test<\/p>\n<p>process id is 579<\/p>\n<p>Catch a signal \u2013 SIGVTALRM<\/p>\n<p>Catch a signal \u2013 SIGALRM<\/p>\n<p>Catch a signal \u2013 SIGVTALRM<\/p>\n<p>Catch a signal \u2013 SIGVTALRM<\/p>\n<p>Catch a signal \u2013 SIGALRM<\/p>\n<p>Catch a signal \u2013GVTALRM<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t16\"><\/a><a name=\"t16\"><\/a>5.5\u00a0\u00a0\u00a0\u00a0abort()<\/h2>\n<p>#include &lt;stdlib.h&gt;<\/p>\n<p>void abort(void);<\/p>\n<p>\u5411\u8fdb\u7a0b\u53d1\u9001SIGABORT\u4fe1\u53f7\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u8fdb\u7a0b\u4f1a\u5f02\u5e38\u9000\u51fa\uff0c\u5f53\u7136\u53ef\u5b9a\u4e49\u81ea\u5df1\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002\u5373\u4f7fSIGABORT\u88ab\u8fdb\u7a0b\u8bbe\u7f6e\u4e3a\u963b\u585e\u4fe1\u53f7\uff0c\u8c03\u7528abort()\u540e\uff0cSIGABORT\u4ecd\u7136\u80fd\u88ab\u8fdb\u7a0b\u63a5\u6536\u3002\u8be5\u51fd\u6570\u65e0\u8fd4\u56de\u503c\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t17\"><\/a><a name=\"t17\"><\/a>5.6\u00a0\u00a0\u00a0\u00a0raise\uff08\uff09<\/h2>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>int raise(int signo)<\/p>\n<p>\u5411\u8fdb\u7a0b\u672c\u8eab\u53d1\u9001\u4fe1\u53f7\uff0c\u53c2\u6570\u4e3a\u5373\u5c06\u53d1\u9001\u7684\u4fe1\u53f7\u503c\u3002\u8c03\u7528\u6210\u529f\u8fd4\u56de 0\uff1b\u5426\u5219\uff0c\u8fd4\u56de -1\u3002<\/p>\n<p>&nbsp;<\/p>\n<h1><a name=\"t18\"><\/a><a name=\"t18\"><\/a>6\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u96c6\u53ca\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570\uff1a<\/h1>\n<p>\u4fe1\u53f7\u96c6\u88ab\u5b9a\u4e49\u4e3a\u4e00\u79cd\u6570\u636e\u7c7b\u578b\uff1a<\/p>\n<p>typedef struct {<\/p>\n<p>unsigned long sig[_NSIG_WORDS]\uff1b<\/p>\n<p>} sigset_t<\/p>\n<p>\u4fe1\u53f7\u96c6\u7528\u6765\u63cf\u8ff0\u4fe1\u53f7\u7684\u96c6\u5408\uff0c\u6bcf\u4e2a\u4fe1\u53f7\u5360\u7528\u4e00\u4f4d\u3002Linux\u6240\u652f\u6301\u7684\u6240\u6709\u4fe1\u53f7\u53ef\u4ee5\u5168\u90e8\u6216\u90e8\u5206\u7684\u51fa\u73b0\u5728\u4fe1\u53f7\u96c6\u4e2d\uff0c\u4e3b\u8981\u4e0e\u4fe1\u53f7\u963b\u585e\u76f8\u5173\u51fd\u6570\u914d\u5408\u4f7f\u7528\u3002\u4e0b\u9762\u662f\u4e3a\u4fe1\u53f7\u96c6\u64cd\u4f5c\u5b9a\u4e49\u7684\u76f8\u5173\u51fd\u6570\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>int sigemptyset(sigset_t *set)\uff1b<\/p>\n<p>int sigfillset(sigset_t *set)\uff1b<\/p>\n<p>int sigaddset(sigset_t *set, int signum)<\/p>\n<p>int sigdelset(sigset_t *set, int signum)\uff1b<\/p>\n<p>int sigismember(const sigset_t *set, int signum)\uff1b<\/p>\n<p>sigemptyset(sigset_t *set)\u521d\u59cb\u5316\u7531set\u6307\u5b9a\u7684\u4fe1\u53f7\u96c6\uff0c\u4fe1\u53f7\u96c6\u91cc\u9762\u7684\u6240\u6709\u4fe1\u53f7\u88ab\u6e05\u7a7a\uff1b<\/p>\n<p>sigfillset(sigset_t *set)\u8c03\u7528\u8be5\u51fd\u6570\u540e\uff0cset\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u5c06\u5305\u542blinux\u652f\u6301\u768464\u79cd\u4fe1\u53f7\uff1b<\/p>\n<p>sigaddset(sigset_t *set, int signum)\u5728set\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u52a0\u5165signum\u4fe1\u53f7\uff1b<\/p>\n<p>sigdelset(sigset_t *set, int signum)\u5728set\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u5220\u9664signum\u4fe1\u53f7\uff1b<\/p>\n<p>sigismember(const sigset_t *set, int signum)\u5224\u5b9a\u4fe1\u53f7signum\u662f\u5426\u5728set\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u3002<\/p>\n<p>&nbsp;<\/p>\n<h1><a name=\"t19\"><\/a><a name=\"t19\"><\/a>7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u963b\u585e\u4e0e\u4fe1\u53f7\u672a\u51b3:<\/h1>\n<p>\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u4e00\u4e2a\u7528\u6765\u63cf\u8ff0\u54ea\u4e9b\u4fe1\u53f7\u9012\u9001\u5230\u8fdb\u7a0b\u65f6\u5c06\u88ab\u963b\u585e\u7684\u4fe1\u53f7\u96c6\uff0c\u8be5\u4fe1\u53f7\u96c6\u4e2d\u7684\u6240\u6709\u4fe1\u53f7\u5728\u9012\u9001\u5230\u8fdb\u7a0b\u540e\u90fd\u5c06\u88ab\u963b\u585e\u3002\u4e0b\u9762\u662f\u4e0e\u4fe1\u53f7\u963b\u585e\u76f8\u5173\u7684\u51e0\u4e2a\u51fd\u6570\uff1a<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>int\u00a0 sigprocmask(int\u00a0 how,\u00a0 const\u00a0 sigset_t *set, sigset_t *oldset))\uff1b<\/p>\n<p>int sigpending(sigset_t *set));<\/p>\n<p>int sigsuspend(const sigset_t *mask))\uff1b<\/p>\n<p>&nbsp;<\/p>\n<p>sigprocmask()\u51fd\u6570\u80fd\u591f\u6839\u636e\u53c2\u6570how\u6765\u5b9e\u73b0\u5bf9\u4fe1\u53f7\u96c6\u7684\u64cd\u4f5c\uff0c\u64cd\u4f5c\u4e3b\u8981\u6709\u4e09\u79cd\uff1a<\/p>\n<p>SIG_BLOCK \u5728\u8fdb\u7a0b\u5f53\u524d\u963b\u585e\u4fe1\u53f7\u96c6\u4e2d\u6dfb\u52a0set\u6307\u5411\u4fe1\u53f7\u96c6\u4e2d\u7684\u4fe1\u53f7<\/p>\n<p>SIG_UNBLOCK \u5982\u679c\u8fdb\u7a0b\u963b\u585e\u4fe1\u53f7\u96c6\u4e2d\u5305\u542bset\u6307\u5411\u4fe1\u53f7\u96c6\u4e2d\u7684\u4fe1\u53f7\uff0c\u5219\u89e3\u9664\u5bf9\u8be5\u4fe1\u53f7\u7684\u963b\u585e<\/p>\n<p>SIG_SETMASK \u66f4\u65b0\u8fdb\u7a0b\u963b\u585e\u4fe1\u53f7\u96c6\u4e3aset\u6307\u5411\u7684\u4fe1\u53f7\u96c6<\/p>\n<p>&nbsp;<\/p>\n<p>sigpending(sigset_t *set))\u83b7\u5f97\u5f53\u524d\u5df2\u9012\u9001\u5230\u8fdb\u7a0b\uff0c\u5374\u88ab\u963b\u585e\u7684\u6240\u6709\u4fe1\u53f7\uff0c\u5728set\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>sigsuspend(const sigset_t *mask))\u7528\u4e8e\u5728\u63a5\u6536\u5230\u67d0\u4e2a\u4fe1\u53f7\u4e4b\u524d, \u4e34\u65f6\u7528mask\u66ff\u6362\u8fdb\u7a0b\u7684\u4fe1\u53f7\u63a9\u7801, \u5e76\u6682\u505c\u8fdb\u7a0b\u6267\u884c\uff0c\u76f4\u5230\u6536\u5230\u4fe1\u53f7\u4e3a\u6b62\u3002sigsuspend \u8fd4\u56de\u540e\u5c06\u6062\u590d\u8c03\u7528\u4e4b\u524d\u7684\u4fe1\u53f7\u63a9\u7801\u3002\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u5b8c\u6210\u540e\uff0c\u8fdb\u7a0b\u5c06\u7ee7\u7eed\u6267\u884c\u3002\u8be5\u7cfb\u7edf\u8c03\u7528\u59cb\u7ec8\u8fd4\u56de-1\uff0c\u5e76\u5c06errno\u8bbe\u7f6e\u4e3aEINTR\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h1><a name=\"t20\"><\/a><a name=\"t20\"><\/a>8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fe1\u53f7\u5e94\u7528\u5b9e\u4f8b<\/h1>\n<p>linux\u4e0b\u7684\u4fe1\u53f7\u5e94\u7528\u5e76\u6ca1\u6709\u60f3\u8c61\u7684\u90a3\u4e48\u6050\u6016\uff0c\u7a0b\u5e8f\u5458\u6240\u8981\u505a\u7684\u6700\u591a\u53ea\u6709\u4e09\u4ef6\u4e8b\u60c5\uff1a<\/p>\n<p>\u5b89\u88c5\u4fe1\u53f7\uff08\u63a8\u8350\u4f7f\u7528sigaction()\uff09\uff1b<\/p>\n<p>\u5b9e\u73b0\u4e09\u53c2\u6570\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0chandler(int signal,struct siginfo *info, void *)\uff1b<\/p>\n<p>\u53d1\u9001\u4fe1\u53f7\uff0c\u63a8\u8350\u4f7f\u7528sigqueue()\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0c\u5bf9\u6709\u4e9b\u4fe1\u53f7\u6765\u8bf4\uff0c\u53ea\u8981\u5b89\u88c5\u4fe1\u53f7\u5c31\u8db3\u591f\u4e86\uff08\u4fe1\u53f7\u5904\u7406\u65b9\u5f0f\u91c7\u7528\u7f3a\u7701\u6216\u5ffd\u7565\uff09\u3002\u5176\u4ed6\u53ef\u80fd\u8981\u505a\u7684\u65e0\u975e\u662f\u4e0e\u4fe1\u53f7\u96c6\u76f8\u5173\u7684\u51e0\u79cd\u64cd\u4f5c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5b9e\u4f8b\u4e00\uff1a\u4fe1\u53f7\u53d1\u9001\u53ca\u5904\u7406<\/p>\n<p>\u5b9e\u73b0\u4e00\u4e2a\u4fe1\u53f7\u63a5\u6536\u7a0b\u5e8fsigreceive\uff08\u5176\u4e2d\u4fe1\u53f7\u5b89\u88c5\u7531sigaction\uff08\uff09\uff09\u3002<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>#include &lt;sys\/types.h&gt;<\/p>\n<p>#include &lt;unistd.h&gt;<\/p>\n<p>void new_op(int,siginfo_t*,void*);<\/p>\n<p>int main(int argc,char**argv)<\/p>\n<p>{<\/p>\n<p>struct sigaction act;<\/p>\n<p>int sig;<\/p>\n<p>sig=atoi(argv[1]);<\/p>\n<p>&nbsp;<\/p>\n<p>sigemptyset(&amp;act.sa_mask);<\/p>\n<p>act.sa_flags=SA_SIGINFO;<\/p>\n<p>act.sa_sigaction=new_op;<\/p>\n<p>&nbsp;<\/p>\n<p>if(sigaction(sig,&amp;act,NULL) &lt; 0)<\/p>\n<p>{<\/p>\n<p>printf(&#8220;install sigal error\\n&#8221;);<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>while(1)<\/p>\n<p>{<\/p>\n<p>sleep(2);<\/p>\n<p>printf(&#8220;wait for the signal\\n&#8221;);<\/p>\n<p>}<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>void new_op(int signum,siginfo_t *info,void *myact)<\/p>\n<p>{<\/p>\n<p>printf(&#8220;receive signal %d&#8221;, signum);<\/p>\n<p>sleep(5);<\/p>\n<p>}<\/p>\n<p>\u8bf4\u660e\uff0c\u547d\u4ee4\u884c\u53c2\u6570\u4e3a\u4fe1\u53f7\u503c\uff0c\u540e\u53f0\u8fd0\u884csigreceive signo &amp;\uff0c\u53ef\u83b7\u5f97\u8be5\u8fdb\u7a0b\u7684ID\uff0c\u5047\u8bbe\u4e3apid\uff0c\u7136\u540e\u518d\u53e6\u4e00\u7ec8\u7aef\u4e0a\u8fd0\u884ckill -s signo pid\u9a8c\u8bc1\u4fe1\u53f7\u7684\u53d1\u9001\u63a5\u6536\u53ca\u5904\u7406\u3002\u540c\u65f6\uff0c\u53ef\u9a8c\u8bc1\u4fe1\u53f7\u7684\u6392\u961f\u95ee\u9898\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5b9e\u4f8b\u4e8c\uff1a\u4fe1\u53f7\u4f20\u9012\u9644\u52a0\u4fe1\u606f<\/p>\n<p>\u4e3b\u8981\u5305\u62ec\u4e24\u4e2a\u5b9e\u4f8b\uff1a<\/p>\n<p>\u5411\u8fdb\u7a0b\u672c\u8eab\u53d1\u9001\u4fe1\u53f7\uff0c\u5e76\u4f20\u9012\u6307\u9488\u53c2\u6570<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>#include &lt;sys\/types.h&gt;<\/p>\n<p>#include &lt;unistd.h&gt;<\/p>\n<p>void new_op(int,siginfo_t*,void*);<\/p>\n<p>int main(int argc,char**argv)<\/p>\n<p>{<\/p>\n<p>struct sigaction act;<\/p>\n<p>union sigval mysigval;<\/p>\n<p>int i;<\/p>\n<p>int sig;<\/p>\n<p>pid_t pid;<\/p>\n<p>char data[10];<\/p>\n<p>memset(data,0,sizeof(data));<\/p>\n<p>for(i=0;i &lt; 5;i++)<\/p>\n<p>data[i]=&#8217;2&#8242;;<\/p>\n<p>mysigval.sival_ptr=data;<\/p>\n<p>&nbsp;<\/p>\n<p>sig=atoi(argv[1]);<\/p>\n<p>pid=getpid();<\/p>\n<p>&nbsp;<\/p>\n<p>sigemptyset(&amp;act.sa_mask);<\/p>\n<p>act.sa_sigaction=new_op;\/\/\u4e09\u53c2\u6570\u4fe1\u53f7\u5904\u7406\u51fd\u6570<\/p>\n<p>act.sa_flags=SA_SIGINFO;\/\/\u4fe1\u606f\u4f20\u9012\u5f00\u5173\uff0c\u5141\u8bb8\u4f20\u8bf4\u53c2\u6570\u4fe1\u606f\u7ed9new_op<\/p>\n<p>if(sigaction(sig,&amp;act,NULL) &lt; 0)<\/p>\n<p>{<\/p>\n<p>printf(&#8220;install sigal error\\n&#8221;);<\/p>\n<p>}<\/p>\n<p>while(1)<\/p>\n<p>{<\/p>\n<p>sleep(2);<\/p>\n<p>printf(&#8220;wait for the signal\\n&#8221;);<\/p>\n<p>sigqueue(pid,sig,mysigval);\/\/\u5411\u672c\u8fdb\u7a0b\u53d1\u9001\u4fe1\u53f7\uff0c\u5e76\u4f20\u9012\u9644\u52a0\u4fe1\u606f<\/p>\n<p>}<\/p>\n<p>}<\/p>\n<p>void new_op(int signum,siginfo_t *info,void *myact)\/\/\u4e09\u53c2\u6570\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u7684\u5b9e\u73b0<\/p>\n<p>{<\/p>\n<p>int i;<\/p>\n<p>for(i=0;i&lt;10;i++)<\/p>\n<p>{<\/p>\n<p>printf(&#8220;%c\\n &#8220;,(*( (char*)((*info).si_ptr)+i)));<\/p>\n<p>}<\/p>\n<p>printf(&#8220;handle signal %d over;&#8221;,signum);<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4fe1\u53f7\u5b9e\u73b0\u4e86\u9644\u52a0\u4fe1\u606f\u7684\u4f20\u9012\uff0c\u4fe1\u53f7\u7a76\u7adf\u5982\u4f55\u5bf9\u8fd9\u4e9b\u4fe1\u606f\u8fdb\u884c\u5904\u7406\u5219\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e0d\u540c\u8fdb\u7a0b\u95f4\u4f20\u9012\u6574\u578b\u53c2\u6570\uff1a<\/p>\n<p>\u628a1\u4e2d\u7684\u4fe1\u53f7\u53d1\u9001\u548c\u63a5\u6536\u653e\u5728\u4e24\u4e2a\u7a0b\u5e8f\u4e2d\uff0c\u5e76\u4e14\u5728\u53d1\u9001\u8fc7\u7a0b\u4e2d\u4f20\u9012\u6574\u578b\u53c2\u6570\u3002<\/p>\n<p>\u4fe1\u53f7\u63a5\u6536\u7a0b\u5e8f\uff1a<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>#include &lt;sys\/types.h&gt;<\/p>\n<p>#include &lt;unistd.h&gt;<\/p>\n<p>void new_op(int,siginfo_t*,void*);<\/p>\n<p>int main(int argc,char**argv)<\/p>\n<p>{<\/p>\n<p>struct sigaction act;<\/p>\n<p>int sig;<\/p>\n<p>pid_t pid;<\/p>\n<p>&nbsp;<\/p>\n<p>pid=getpid();<\/p>\n<p>sig=atoi(argv[1]);<\/p>\n<p>&nbsp;<\/p>\n<p>sigemptyset(&amp;act.sa_mask);<\/p>\n<p>act.sa_sigaction=new_op;<\/p>\n<p>act.sa_flags=SA_SIGINFO;<\/p>\n<p>if(sigaction(sig,&amp;act,NULL)&lt;0)<\/p>\n<p>{<\/p>\n<p>printf(&#8220;install sigal error\\n&#8221;);<\/p>\n<p>}<\/p>\n<p>while(1)<\/p>\n<p>{<\/p>\n<p>sleep(2);<\/p>\n<p>printf(&#8220;wait for the signal\\n&#8221;);<\/p>\n<p>}<\/p>\n<p>}<\/p>\n<p>void new_op(int signum,siginfo_t *info,void *myact)<\/p>\n<p>{<\/p>\n<p>printf(&#8220;the int value is %d \\n&#8221;,info-&gt;si_int);<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u4fe1\u53f7\u53d1\u9001\u7a0b\u5e8f\uff1a<\/p>\n<p>\u547d\u4ee4\u884c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e3a\u4fe1\u53f7\u503c\uff0c\u7b2c\u4e09\u4e2a\u53c2\u6570\u4e3a\u63a5\u6536\u8fdb\u7a0bID\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>#include &lt;signal.h&gt;<\/p>\n<p>#include &lt;sys\/time.h&gt;<\/p>\n<p>#include &lt;unistd.h&gt;<\/p>\n<p>#include &lt;sys\/types.h&gt;<\/p>\n<p>main(int argc,char**argv)<\/p>\n<p>{<\/p>\n<p>pid_t pid;<\/p>\n<p>int signum;<\/p>\n<p>union sigval mysigval;<\/p>\n<p>signum=atoi(argv[1]);<\/p>\n<p>pid=(pid_t)atoi(argv[2]);<\/p>\n<p>mysigval.sival_int=8;\/\/\u4e0d\u4ee3\u8868\u5177\u4f53\u542b\u4e49\uff0c\u53ea\u7528\u4e8e\u8bf4\u660e\u95ee\u9898<\/p>\n<p>if(sigqueue(pid,signum,mysigval)==-1)<\/p>\n<p>printf(&#8220;send error\\n&#8221;);<\/p>\n<p>sleep(2);<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u6ce8\uff1a\u5b9e\u4f8b2\u7684\u4e24\u4e2a\u4f8b\u5b50\u4fa7\u91cd\u70b9\u5728\u4e8e\u7528\u4fe1\u53f7\u6765\u4f20\u9012\u4fe1\u606f\uff0c\u76ee\u524d\u5173\u4e8e\u5728linux\u4e0b\u901a\u8fc7\u4fe1\u53f7\u4f20\u9012\u4fe1\u606f\u7684\u5b9e\u4f8b\u975e\u5e38\u5c11\uff0c\u5012\u662fUnix\u4e0b\u6709\u4e00\u4e9b\uff0c\u4f46\u4f20\u9012\u7684\u57fa\u672c\u4e0a\u90fd\u662f\u5173\u4e8e\u4f20\u9012\u4e00\u4e2a\u6574\u6570<\/p>\n<p>&nbsp;<\/p>\n<p>\u5b9e\u4f8b\u4e09\uff1a\u4fe1\u53f7\u963b\u585e\u53ca\u4fe1\u53f7\u96c6\u64cd\u4f5c<\/p>\n<p>#include &#8220;signal.h&#8221;<\/p>\n<p>#include &#8220;unistd.h&#8221;<\/p>\n<p>static void my_op(int);<\/p>\n<p>main()<\/p>\n<p>{<\/p>\n<p>sigset_t new_mask,old_mask,pending_mask;<\/p>\n<p>struct sigaction act;<\/p>\n<p>sigemptyset(&amp;act.sa_mask);<\/p>\n<p>act.sa_flags=SA_SIGINFO;<\/p>\n<p>act.sa_sigaction=(void*)my_op;<\/p>\n<p>if(sigaction(SIGRTMIN+10,&amp;act,NULL))<\/p>\n<p>printf(&#8220;install signal SIGRTMIN+10 error\\n&#8221;);<\/p>\n<p>sigemptyset(&amp;new_mask);<\/p>\n<p>sigaddset(&amp;new_mask,SIGRTMIN+10);<\/p>\n<p>if(sigprocmask(SIG_BLOCK, &amp;new_mask,&amp;old_mask))<\/p>\n<p>printf(&#8220;block signal SIGRTMIN+10 error\\n&#8221;);<\/p>\n<p>sleep(10);<\/p>\n<p>printf(&#8220;now begin to get pending mask and unblock SIGRTMIN+10\\n&#8221;);<\/p>\n<p>if(sigpending(&amp;pending_mask)&lt;0)<\/p>\n<p>printf(&#8220;get pending mask error\\n&#8221;);<\/p>\n<p>if(sigismember(&amp;pending_mask,SIGRTMIN+10))<\/p>\n<p>printf(&#8220;signal SIGRTMIN+10 is pending\\n&#8221;);<\/p>\n<p>if(sigprocmask(SIG_SETMASK,&amp;old_mask,NULL)&lt;0)<\/p>\n<p>printf(&#8220;unblock signal error\\n&#8221;);<\/p>\n<p>printf(&#8220;signal unblocked\\n&#8221;);<\/p>\n<p>sleep(10);<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>static void my_op(int signum)<\/p>\n<p>{<\/p>\n<p>printf(&#8220;receive signal %d \\n&#8221;,signum);<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>\u7f16\u8bd1\u8be5\u7a0b\u5e8f\uff0c\u5e76\u4ee5\u540e\u53f0\u65b9\u5f0f\u8fd0\u884c\u3002\u5728\u53e6\u4e00\u7ec8\u7aef\u5411\u8be5\u8fdb\u7a0b\u53d1\u9001\u4fe1\u53f7(\u8fd0\u884ckill -s 42 pid\uff0cSIGRTMIN+10\u4e3a42)\uff0c\u67e5\u770b\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\u51e0\u4e2a\u5173\u952e\u51fd\u6570\u7684\u8fd0\u884c\u673a\u5236\uff0c\u4fe1\u53f7\u96c6\u76f8\u5173\u64cd\u4f5c\u6bd4\u8f83\u7b80\u5355\u3002<\/p>\n<p>&nbsp;<\/p>\n<h1><a name=\"t21\"><\/a><a name=\"t21\"><\/a>9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53c2\u8003\u9e23\u8c22\uff1a<\/h1>\n<p>linux\u4fe1\u53f7\u5904\u7406\u673a\u5236(\u8be6\u89e3)\uff0chttp:\/\/www.zxbc.cn\/html\/20080712\/61613.html<\/p>\n<p>Linux\u73af\u5883\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff08\u4e8c\uff09: \u4fe1\u53f7\uff08\u4e0a\uff09\uff0c\u90d1\u5f66\u5174 (mlinux@163.com)<\/p>\n<p>signal\u3001sigaction\u3001kill\u7b49\u624b\u518c\uff0c\u6700\u76f4\u63a5\u800c\u53ef\u9760\u7684\u53c2\u8003\u8d44\u6599\u3002<\/p>\n<p>http:\/\/www.linuxjournal.com\/modules.php?op=modload&#038;name=NS-help&#038;file=man\u63d0\u4f9b\u4e86\u8bb8\u591a\u7cfb\u7edf\u8c03\u7528\u3001\u5e93\u51fd\u6570\u7b49\u7684\u5728\u7ebf\u6307\u5357\u3002<\/p>\n<p>http:\/\/www.opengroup.org\/onlinepubs\/007904975\/\u53ef\u4ee5\u5728\u8fd9\u91cc\u5bf9\u8bb8\u591a\u5173\u952e\u51fd\u6570\uff08\u5305\u62ec\u7cfb\u7edf\u8c03\u7528\uff09\u8fdb\u884c\u67e5\u8be2\uff0c\u975e\u5e38\u597d\u7684\u4e00\u4e2a\u7f51\u5740<\/p>\n<p>\u8fdb\u7a0b\u95f4\u901a\u4fe1\u4fe1\u53f7\uff08\u4e0a\uff09 http:\/\/www-128.ibm.com\/developerworks\/cn\/linux\/l-ipc\/part2\/index1.html<\/p>\n<p>\u8fdb\u7a0b\u95f4\u901a\u4fe1\u4fe1\u53f7\uff08\u4e0b\uff09http:\/\/www-128.ibm.com\/developerworks\/cn\/linux\/l-ipc\/part2\/index2.html<\/p>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>\u539f\u6587\u5730\u5740 \u3010\u6458\u8981\u3011\u672c\u6587\u5206\u6790\u4e86Linux\u5185<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[117],"class_list":["post-5033","post","type-post","status-publish","format-standard","hentry","tag-01-linux"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=5033"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5033\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=5033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=5033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=5033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}