{"id":29305,"date":"2025-04-20T07:31:07","date_gmt":"2025-04-19T23:31:07","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/29305.html"},"modified":"2025-04-20T07:31:07","modified_gmt":"2025-04-19T23:31:07","slug":"%e3%80%90linux%e3%80%91%e8%bf%9b%e7%a8%8b%e4%bf%a1%e5%8f%b7%e7%9a%84%e5%8f%91%e9%80%81%e5%92%8c%e4%bf%9d%e5%ad%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/29305.html","title":{"rendered":"\u3010Linux\u3011\u8fdb\u7a0b\u4fe1\u53f7\u7684\u53d1\u9001\u548c\u4fdd\u5b58"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419233104-68043238d6f27.jpg\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u4e2a\u4eba\u4e3b\u9875~<\/p>\n<hr 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\u6587\u4ef6&#xff0c;\u901a\u8fc7\u5206\u6790\u8fd9\u4e9b\u4fe1\u606f&#xff0c;\u51c6\u786e\u5730\u627e\u5230\u7a0b\u5e8f\u5d29\u6e83\u7684\u4f4d\u7f6e\u548c\u539f\u56e0<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7ulimit -c 10240\u5c06core\u6587\u4ef6\u7684\u5927\u5c0f\u9650\u5236\u4fee\u6539\u4e3a10240\u5b57\u8282&#xff0c;\u51fa\u73b0\u9519\u8bef\u7684\u65f6\u5019core\u6587\u4ef6\u53ef\u80fd\u77ac\u95f4\u4f1a\u88ab\u6253\u6ee1\u7684&#xff0c;\u6240\u4ee5\u6211\u4eec\u4e91\u670d\u52a1\u5668\u4e0a\u4e00\u822c\u9ed8\u8ba4core\u6587\u4ef6\u7684\u5927\u5c0f\u9650\u5236\u4e3a0&#xff0c;\u6211\u4eec\u8981\u662f\u7528\u7684\u8bdd\u518d\u4fee\u6539\u5b83\u7684\u5927\u5c0f\u9650\u5236\u5373\u53ef \u5f62\u6210\u7684\u6587\u4ef6\u53eb\u505acore.pid&#xff0c;pid\u5c31\u662f\u51fa\u9519\u8fdb\u7a0b\u7684pid&#xff0c;\u5047\u8bbetest\u8fdb\u7a0b\u51fa\u73b0\u9519\u8bef&#xff0c;12314\u662f\u5b83\u7684pid&#xff0c;\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5728gdb\u6a21\u5f0f\u4e0b\u8f93\u5165gdb test core.12314\u6253\u5370\u9519\u8bef\u4fe1\u606f\u548c\u539f\u56e0<\/p>\n<h2>\u4e8c\u3001\u4fe1\u53f7\u7684\u4fdd\u5b58<\/h2>\n<h3>1\u3001\u524d\u7f6e\u6982\u5ff5<\/h3>\n<p>\u5b9e\u9645\u6267\u884c\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u79f0\u4e3a\u4fe1\u53f7\u9012\u8fbe<\/p>\n<p>\u4fe1\u53f7\u4ece\u4ea7\u751f\u5230\u9012\u8fbe\u4e4b\u95f4\u7684\u72b6\u6001&#xff0c;\u79f0\u4e3a\u4fe1\u53f7\u672a\u51b3<\/p>\n<p>\u88ab\u963b\u585e\u7684\u4fe1\u53f7\u4ea7\u751f\u662f\u5c06\u4fdd\u6301\u5728\u672a\u51b3\u72b6\u6001&#xff0c;\u76f4\u5230\u8fdb\u7a0b\u89e3\u9664\u5bf9\u6b64\u4fe1\u53f7\u7684\u963b\u585e&#xff0c;\u624d\u6267\u884c\u9012\u8fbe\u7684\u52a8\u4f5c<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419233105-6804323942b50.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>2\u3001\u963b\u585e\u4fe1\u53f7<\/h3>\n<p>\u4fe1\u53f7\u88ab\u963b\u585e\u5c31\u662f\u5c06\u4fe1\u53f7\u963b\u585e\u5728\u4fe1\u53f7\u672a\u51b3\u72b6\u6001&#xff0c;\u5177\u4f53\u5b9e\u73b0\u963b\u585e\u529f\u80fd\u7684&#xff0c;\u662f\u4e00\u4e2a\u4f4d\u56feblock<\/p>\n<p>block\u662f\u4e00\u4e2a\u4f4d\u56fe&#xff0c;\u517131\u4f4d&#xff0c;\u5bf9\u5e941 ~ 31\u53f7\u4fe1\u53f7&#xff0c;\u5f53\u5bf9\u5e94\u6bd4\u7279\u4f4d\u4e3a1\u65f6&#xff0c;\u8868\u793a\u8be5\u7f16\u53f7\u4fe1\u53f7\u88ab\u963b\u585e&#xff0c;\u4e3a0\u5219\u8868\u793a\u4e0d\u963b\u585e<\/p>\n<p>\u5982\u679c\u4fe1\u53f7\u88ab\u963b\u585e\u5219\u8fdb\u5165\u963b\u585e\u6001&#xff0c;\u82e5\u6ca1\u6709\u88ab\u963b\u585e\u90a3\u4e48\u4fe1\u53f7\u8fdb\u5165\u672a\u51b3\u72b6\u6001<\/p>\n<h3>3\u3001\u4fdd\u5b58\u4fe1\u53f7<\/h3>\n<p>\u672a\u51b3\u72b6\u6001\u7684\u4f5c\u7528\u5c31\u662f\u4fdd\u5b58\u4fe1\u53f7&#xff0c;\u5b83\u4fdd\u5b58\u4fe1\u53f7\u7684\u65b9\u5f0f\u4e5f\u662f\u901a\u8fc7\u4f4d\u56fepending<\/p>\n<p>pending\u4e5f\u662f\u4e00\u4e2a\u4f4d\u56fe&#xff0c;\u4e0eblock\u4e00\u81f4&#xff0c;\u5bf9\u5e94\u7684\u4e0b\u6807\u548c\u4fe1\u53f7\u7f16\u53f7\u4e5f\u662f\u4e00\u4e00\u5bf9\u5e94&#xff0c;\u5f53\u5bf9\u5e94\u6bd4\u7279\u4f4d\u4e3a1\u65f6&#xff0c;\u8868\u793a\u8be5\u7f16\u53f7\u4fe1\u53f7\u5904\u4e8e\u672a\u51b3\u72b6\u6001&#xff0c;\u4e3a0\u5219\u4fe1\u53f7\u9012\u8fbe<\/p>\n<p>\u5b9e\u9645\u4e0ablock\u548cpending\u90fd\u5c5e\u4e8e\u4fdd\u5b58\u4fe1\u53f7&#xff0c;\u53ea\u4e0d\u8fc7\u56e0\u4e3a\u6709\u4e24\u4e2a\u4f4d\u56fe&#xff0c;\u6211\u4eec\u5206\u5f00\u6765\u8bf4\u7f62\u4e86<\/p>\n<h3>4\u3001\u4fe1\u53f7\u9012\u8fbe<\/h3>\n<p>\u4fe1\u53f7\u9012\u8fbe\u540e\u7684\u4fe1\u53f7&#xff0c;\u4f1a\u6267\u884c\u76f8\u5bf9\u5e94\u7684\u884c\u4e3a&#xff0c;\u6709SIG_DFL:\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c&#xff0c;SIG_IGN:\u5ffd\u7565&#xff0c;\u548c\u81ea\u5b9a\u4e49\u5904\u7406sighandler&#xff0c;\u8fd9\u5728\u524d\u9762\u63d0\u5230\u8fc7<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419233105-680432396761b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>5\u3001\u603b\u7ed3<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419233105-68043239874d8.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u4e00\u4e2a\u4fe1\u53f7&#xff0c;\u9996\u5148\u8981\u7ecf\u8fc7block&#xff0c;block\u4e3a0\u6765\u5230pending&#xff0c;pending\u4e3a0\u6765\u5230handler\u6267\u884c\u52a8\u4f5c&#xff0c;\u5176\u4e2d&#xff0c;9\u53f7\u548c19\u53f7\u65b0\u53f7\u8fd8\u662f\u7279\u4f8b&#xff0c;\u5b83\u4eec\u662f\u4e0d\u80fd\u88ab\u963b\u585e\u548c\u4fdd\u5b58\u7684&#xff0c;\u8fd9\u4e24\u4e2a\u4fe1\u53f7\u4e00\u65e6\u53d1\u51fa\u5c31\u662f\u76f4\u63a5handler&#xff0c;\u5176\u5b9e\u4e5f\u4e0d\u7528handler\u4e86&#xff0c;\u5b83\u4eec\u5bf9\u5e94\u7684\u4e0d\u53ef\u80fd\u4e3a\u5ffd\u7565\u548c\u4fe1\u53f7\u6355\u6349\u540e\u7684\u81ea\u5b9a\u4e49\u51fd\u6570&#xff0c;\u53ea\u80fd\u4e3a\u9ed8\u8ba4\u52a8\u4f5c\u7ec8\u6b62\u548c\u6682\u505c<\/p>\n<h2>\u4e09\u3001\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570<\/h2>\n<p>\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570\u987e\u540d\u601d\u4e49\u5c31\u662f\u64cd\u4f5c\u4fe1\u53f7\u96c6\u7684\u51fd\u6570&#xff0c;sigset_t\u88ab\u79f0\u4f5c\u4fe1\u53f7\u96c6&#xff0c;\u662f\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u6570\u636e\u7c7b\u578b&#xff0c;\u7528\u4e8e\u63cf\u8ff0\u4f4d\u56fe&#xff0c;\u4e0b\u9762\u5c31\u662f\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;signal.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">sigemptyset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">sigset_t<\/span> <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5c06\u4f4d\u56fe\u5168\u90e8\u8bbe\u7f6e\u4e3a 0<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">sigfillset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">sigset_t<\/span> <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5c06\u4f4d\u56fe\u5168\u90e8\u90fd\u8bbe\u7f6e\u4e3a 1<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">sigaddset<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">sigset_t<\/span> <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> signo<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5c06\u4f4d\u56fe\u4e2d\u7684\u67d0\u4e00\u4f4d\u8bbe\u7f6e\u4e3a 1<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">sigdelset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">sigset_t<\/span> <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> signo<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5c06\u4f4d\u56fe\u4e2d\u7684\u67d0\u4e00\u4f4d\u8bbe\u7f6e\u4e3a 0<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">sigismember<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token class-name\">sigset_t<\/span> <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> signo<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5224\u65ad\u4e00\u4e2a\u4fe1\u53f7\u662f\u5426\u5728\u4fe1\u53f7\u96c6\u4e2d&#xff0c;\u4e0d\u5728\u8fd4\u56de0&#xff0c;\u5728\u8fd4\u56de1&#xff0c;\u51fa\u9519\u8fd4\u56de-1<\/span><\/p>\n<h3>1\u3001\u8bbe\u7f6eblock\u4f4d\u56fe<\/h3>\n<p>sigprocmask\u662f\u4e00\u4e2a\u5728\u4fe1\u53f7\u5904\u7406\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u7cfb\u7edf\u8c03\u7528&#xff0c;\u4e3b\u8981\u7528\u4e8e\u68c0\u67e5\u3001\u4fee\u6539\u8fdb\u7a0b\u7684\u4fe1\u53f7\u63a9\u7801&#xff08;\u963b\u585e\u4fe1\u53f7\u96c6&#xff09;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;signal.h&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">sigprocmask<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> how<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token class-name\">sigset_t<\/span> <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">sigset_t<\/span> <span class=\"token operator\">*<\/span>oset<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <\/p>\n<p>\u8fd4\u56de\u503c:\u82e5\u6210\u529f\u5219\u4e3a0,\u82e5\u51fa\u9519\u5219\u4e3a-1<\/p>\n<p>how&#xff1a;\u6307\u5b9a\u5bf9\u4fe1\u53f7\u63a9\u7801\u7684\u64cd\u4f5c\u65b9\u5f0f<\/p>\n<table>\n<tr>how \u53d6\u503c\u542b\u4e49\u793a\u4f8b\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>SIG_BLOCK<\/td>\n<td>\u5c06 set \u6240\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u7684\u4fe1\u53f7\u6dfb\u52a0\u5230\u5f53\u524d\u7684\u4fe1\u53f7\u63a9\u7801\u4e2d&#xff0c;\u5373\u963b\u585e set \u4e2d\u7684\u4fe1\u53f7<\/td>\n<td>\u82e5\u5f53\u524d\u4fe1\u53f7\u63a9\u7801\u5df2\u963b\u585e SIGINT&#xff0c;\u4f7f\u7528 SIG_BLOCK \u5e76\u4f20\u5165\u5305\u542b SIGTERM \u7684\u4fe1\u53f7\u96c6&#xff0c;SIGTERM \u4e5f\u4f1a\u88ab\u963b\u585e<\/td>\n<\/tr>\n<tr>\n<td>SIG_UNBLOCK<\/td>\n<td>\u4ece\u5f53\u524d\u7684\u4fe1\u53f7\u63a9\u7801\u4e2d\u79fb\u9664 set \u6240\u6307\u5411\u7684\u4fe1\u53f7\u96c6\u4e2d\u7684\u4fe1\u53f7&#xff0c;\u5373\u89e3\u9664\u5bf9 set \u4e2d\u4fe1\u53f7\u7684\u963b\u585e<\/td>\n<td>\u82e5\u5f53\u524d\u4fe1\u53f7\u63a9\u7801\u963b\u585e\u4e86 SIGINT \u548c SIGTERM&#xff0c;\u4f7f\u7528 SIG_UNBLOCK \u5e76\u4f20\u5165\u5305\u542b SIGINT \u7684\u4fe1\u53f7\u96c6&#xff0c;SIGINT \u4fe1\u53f7\u7684\u963b\u585e\u72b6\u6001\u5c06\u88ab\u89e3\u9664<\/td>\n<\/tr>\n<tr>\n<td>SIG_SETMASK<\/td>\n<td>\u5c06\u5f53\u524d\u7684\u4fe1\u53f7\u63a9\u7801\u8bbe\u7f6e\u4e3a set \u6240\u6307\u5411\u7684\u4fe1\u53f7\u96c6&#xff0c;\u8986\u76d6\u539f\u6765\u7684\u4fe1\u53f7\u63a9\u7801<\/td>\n<td>\u82e5\u539f\u4fe1\u53f7\u63a9\u7801\u963b\u585e SIGINT&#xff0c;\u4f7f\u7528 SIG_SETMASK \u5e76\u4f20\u5165\u5305\u542b SIGTERM \u7684\u4fe1\u53f7\u96c6&#xff0c;\u4fe1\u53f7\u63a9\u7801\u5c06\u53ea\u963b\u585e SIGTERM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>set&#xff1a;\u6307\u5411\u4e00\u4e2asigset_t\u7c7b\u578b\u7684\u4fe1\u53f7\u96c6&#xff0c;\u8be5\u4fe1\u53f7\u96c6\u5305\u542b\u4e86\u8981\u64cd\u4f5c\u7684\u4fe1\u53f7&#xff0c;\u5982\u679chow\u7684\u503c\u4e3aSIG_BLOCK\u6216SIG_UNBLOCK&#xff0c;\u5219set\u8868\u793a\u8981\u6dfb\u52a0\u6216\u79fb\u9664\u7684\u4fe1\u53f7\u96c6&#xff1b;\u5982\u679chow\u7684\u503c\u4e3aSIG_SETMASK&#xff0c;\u5219set\u8868\u793a\u8981\u8bbe\u7f6e\u7684\u65b0\u7684\u4fe1\u53f7\u63a9\u7801&#xff0c;\u82e5\u8be5\u53c2\u6570\u4e3aNULL&#xff0c;\u5219\u4e0d\u6539\u53d8\u5f53\u524d\u7684\u4fe1\u53f7\u63a9\u7801&#xff0c;\u4ec5\u83b7\u53d6\u5f53\u524d\u4fe1\u53f7\u63a9\u7801&#xff0c;\u6b64\u65f6oset\u4e0d\u80fd\u4e3aNULL<\/p>\n<p>oset&#xff1a;\u6307\u5411\u4e00\u4e2asigset_t\u7c7b\u578b\u7684\u4fe1\u53f7\u96c6&#xff0c;\u7528\u4e8e\u5b58\u50a8\u8c03\u7528sigprocmask\u4e4b\u524d\u7684\u4fe1\u53f7\u63a9\u7801&#xff0c;\u5982\u679c\u4e0d\u9700\u8981\u4fdd\u5b58\u65e7\u7684\u4fe1\u53f7\u63a9\u7801&#xff0c;\u53ef\u4ee5\u5c06\u8be5\u53c2\u6570\u8bbe\u7f6e\u4e3aNULL<\/p>\n<h3>2\u3001\u8bbe\u7f6epending\u4f4d\u56fe<\/h3>\n<p>sigpending\u662f\u4e00\u4e2a\u7528\u4e8e\u83b7\u53d6\u8fdb\u7a0b\u5f53\u524d\u672a\u51b3\u4fe1\u53f7\u96c6\u7684\u7cfb\u7edf\u8c03\u7528<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;signal.h&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">sigpending<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">sigset_t<\/span> <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de0&#xff0c;\u5931\u8d25\u8fd4\u56de-1<\/p>\n<p>set&#xff1a;sigpending\u51fd\u6570\u4f1a\u5c06\u5f53\u524d\u8fdb\u7a0b\u4e2d\u5904\u4e8e\u672a\u51b3\u72b6\u6001&#xff08;\u5373\u5df2\u53d1\u9001\u4f46\u7531\u4e8e\u88ab\u963b\u585e\u800c\u5c1a\u672a\u88ab\u5904\u7406&#xff09;\u7684\u4fe1\u53f7\u96c6\u5b58\u50a8\u5230set\u6240\u6307\u5411\u7684sigset_t\u5bf9\u8c61\u4e2d<\/p>\n<h3>3\u3001\u8bbe\u7f6ehandler\u884c\u4e3a<\/h3>\n<p>\u4e09\u79cd\u60c5\u51b5&#xff0c;\u9ed8\u8ba4&#xff0c;\u5ffd\u7565\u548c\u81ea\u5b9a\u4e49&#xff0c;\u81ea\u5b9a\u4e49\u90a3\u5f53\u7136\u662fsignal\u51fd\u6570&#xff0c;\u524d\u9762\u6709&#xff0c;\u4e0d\u518d\u8d58\u8ff0<\/p>\n<h2>\u56db\u3001\u9a8c\u8bc1\u4fe1\u53f7\u4fdd\u5b58\u884c\u4e3a<\/h2>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;signal.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unistd.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/\u6253\u5370\u51fa\u4f4d\u56fe<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">PrintPending<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> sigset_t <span class=\"token operator\">&amp;<\/span>pset<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">31<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">sigismember<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>pset<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    cout <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">handler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> signum<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;catch a signum: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> signum <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/\/\u81ea\u5b9a\u4e49\u6355\u63492\u53f7\u4fe1\u53f7<\/span><br \/>\n    <span class=\"token function\">signal<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> handler<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    sigset_t bset<span class=\"token punctuation\">,<\/span> oset<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">sigemptyset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>bset<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ bset\u4fe1\u53f7\u96c6\u6e05\u7a7a<\/span><br \/>\n    <span class=\"token function\">sigemptyset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>oset<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ oset\u4fe1\u53f7\u96c6\u6e05\u7a7a<\/span><br \/>\n    <span class=\"token function\">sigaddset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>bset<span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5c06bset\u7684\u7b2c2\u4f4d\u8bbe\u4e3a1&#xff0c;\u4e5f\u5c31\u662f\u7ed9bset\u4e2d\u6dfb\u52a0\u4e0a2\u53f7\u4fe1\u53f7<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8c03\u7528\u7cfb\u7edf\u8c03\u7528&#xff0c;\u5c06\u6570\u636e\u8bbe\u7f6e\u8fdb\u5185\u6838&#xff0c;\u8bbe\u7f6eblock&#xff0c;\u6b64\u65f62\u53f7\u4fe1\u53f7\u88ab\u963b\u585e<\/span><br \/>\n    <span class=\"token function\">sigprocmask<\/span><span class=\"token punctuation\">(<\/span>SIG_SETMASK<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>bset<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>oset<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u91cd\u590d\u6253\u5370\u5f53\u524d\u8fdb\u7a0b\u7684 pending \u4fe1\u53f7\u96c6&#xff0c;\u671f\u95f4\u5411\u8fdb\u7a0b\u53d1\u9001 2\u53f7\u4fe1\u53f7<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u56e0\u4e3a 2\u53f7\u4fe1\u53f7\u88ab\u963b\u585e\u4e86&#xff0c;\u6240\u4ee5 2\u53f7\u4fe1\u53f7\u4f1a\u4e00\u76f4\u88ab\u4fdd\u5b58\u5728 pending \u4e2d<\/span><br \/>\n    sigset_t pset<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">sigemptyset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>pset<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ pset\u4fe1\u53f7\u96c6\u6e05\u7a7a<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> cnt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u572815\u79d2\u5185&#xff0c;\u672a\u63a5\u53d7\u4fe1\u53f7\u524d&#xff0c;\u90fd\u662f\u4e00\u76f4\u6253\u53700<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n         <span class=\"token keyword\">int<\/span> n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sigpending<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>pset<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br 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