{"id":636,"date":"2011-03-18T22:34:57","date_gmt":"2011-03-18T14:34:57","guid":{"rendered":"http:\/\/www.strongd.net\/?p=636"},"modified":"2011-03-18T22:34:57","modified_gmt":"2011-03-18T14:34:57","slug":"bash%e4%b8%8b%e5%88%a9%e7%94%a8trap%e6%8d%95%e6%8d%89%e4%bf%a1%e5%8f%b7","status":"publish","type":"post","link":"https:\/\/www.strongd.net\/?p=636","title":{"rendered":"bash\u4e0b\u5229\u7528trap\u6355\u6349\u4fe1\u53f7"},"content":{"rendered":"<p>\u6211\u5728\u4e4b\u524d\u7684\u6587\u7ae0\u91cc\u5199\u4e86myisam\u8bfb\u6570\u636e\u538b\u7f29\u7684\u60c5\u51b5\uff0c\u6700\u8fd1\u51b3\u5b9a\u628a\u5b83\u7528\u5728\u751f\u4ea7\u73af\u5883\u4e0a\uff0c\u6240\u4ee5\u907f\u514d\u4e0d\u4e86\u5199\u4e00\u4e2a\u201c<strong>\u5b89\u5168<\/strong>\u201d\u7684\u5904\u7406\u811a\u672c\u653e\u5728DB\u670d\u52a1\u5668\u4e0a\uff0c\u8fd9\u5c31\u5f15\u5165\u4e86\u672c\u6587\u6240\u8ba8\u8bba\u7684\u8bdd\u9898\u3002<\/p>\n<p>\u6211\u5e0c\u671b\u8fd9\u4e2abash\u811a\u672c\u5728\u9000\u51fa\u7684\u65f6\u5019\u505a\u4e00\u4e9b\u4e8b\u60c5\uff0c\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\u5b83\u542f\u52a8\u7684\u5207\u5230\u540e\u53f0\u7684job\u9700\u8981\u88ab\u6740\u6b7b\uff1b<\/li>\n<li>\u4e00\u4e9b\u4e34\u65f6\u6587\u4ef6\u7684\u6e05\u7406\u3002<\/li>\n<\/ol>\n<p>\u5728\u8fd9\u4e2a\u811a\u672c\u91cc\u6211\u7528\u5230\u4e86trap\u8fd9\u4e2a\u547d\u4ee4\uff0c\u5173\u4e8e\u5b83\uff0c\u4f60\u53ef\u4ee5man\u4e00\u4e0b\uff0c\u6211\u8fd9\u91cc\u5c31\u4e0d\u5570\u55e6\u4e86\u3002\u76f4\u63a5\u4e0a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<div>\n<div>\n<pre>$ cat test_trap.sh\r\n\r\ndeclare -i run_terminate=0\r\n\r\ntrap \"run_terminate=1\" SIGINT SIGTERM\r\n\r\n# \u542f\u52a8io\u76d1\u63a7\uff0cIO\u8f83\u5927\u65f6\u4e0d\u8fdb\u884c\u538b\u7f29\r\nvmstat 1 &amp;gt;&amp;gt; .\/a.log &amp;amp;\r\n\r\nwhile [ ${run_terminate} -eq 0 ]\r\ndo\r\n    # \u6838\u5fc3\u4ee3\u7801\r\n    sleep 30\r\ndone\r\n\r\nfor pid in $(ps -ef | awk -v p=${$} '{if ($3 == p){print $2}}')\r\ndo\r\n    kill -9 ${pid} &amp;gt; \/dev\/null\r\ndone\r\n\r\nrm -f .\/a.log\r\necho \"Terminated.\"<\/pre>\n<\/div>\n<\/div>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u6355\u6349INT\u4fe1\u53f7\uff08CTRL+C\uff09\u548cTERM\u4fe1\u53f7\uff08kill\u4ea7\u751f\uff09\u3002\u8fd0\u884c\u7a0b\u5e8f\uff1a<\/p>\n<div>\n<div>\n<pre>$ \/bin\/bash test_trap.sh\r\n\r\n^C<\/pre>\n<\/div>\n<\/div>\n<p>\u6309\u7167\u6211\u4eec\u9884\u671f\u7684\uff0c\u5f53\u6211CTRL+C\u9000\u51fa\u7a0b\u5e8f\uff0c\u6216\u8005kill\u8fdb\u7a0b\u65f6\uff0c\u4e0a\u9762\u7684\u811a\u672c\u5e94\u8be5\u505c\u6389vmstat\u8fdb\u7a0b\uff0c\u5e76\u4e14\u5220\u9664a.log\uff0c\u8f93\u51fa\u201cTerminated\u201d\u540e\u9000\u51fa\u3002<\/p>\n<p>\u4f46\u662f\uff0cCTRL+C\u786e\u5b9e\u6309\u7167\u6211\u4eec\u7684\u8bbe\u60f3\u8fdb\u884c\u4e86\u3002\u53efkill\u4e4b\u540e\u7a0b\u5e8f\u5e76\u6ca1\u6709\u4efb\u4f55\u53cd\u5e94\uff0c\u8fd9\u662f\u4e3a\u4f55\uff1f<\/p>\n<p>Google\u4e86\u4e00\u904d\uff0c\u5929\u4e0b\u6587\u7ae0\u4e00\u5927\u6284\uff0c\u76f8\u4f3c\u7684\u4f8b\u5b50\uff0c\u5374\u6ca1\u6709\u4eba\u629b\u51fa\u8fd9\u4e2a\u95ee\u9898\u3002\u601d\u7d22\u4e86\u534a\u5929\uff0c\u5e61\u7136\u9192\u609f\uff1a<\/p>\n<ol>\n<li>kill\uff08killall\uff09\u547d\u4ee4\u53ea\u662f\u53d1\u51fa\u4e00\u4e2aTERM\u4fe1\u53f7\uff0815\uff09\uff0c\u81f3\u4e8e\u8fd9\u4e2a\u4fe1\u53f7\u662f\u5426\u88ab\u5bf9\u5e94\u8fdb\u7a0b\u6355\u6349\u5e76\u5904\u7406\u4e86\uff0c\u5b83\u5e76\u4e0d\u7ba1\uff1b<\/li>\n<li>kill\u53d1\u51fa\u7684\u65f6\u5019\uff0ctest_trap.sh\u6b63\u5728sleep\u2014\u2014\u8fd9\u4e2a\u65f6\u95f4\u6709\u70b9\u957f\uff0830\u79d2\uff09\u3002<\/li>\n<\/ol>\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u7b49\u5b83\u201c\u7761\u9192\u201d\u4e86\uff0c\u5b83\u81ea\u7136\u4f1a\u5904\u7406TERM\u4fe1\u53f7\u7684\u3002\u4e0d\u4fe1\uff0c\u4f60\u591a\u7b49\u4e00\u4f1a\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u5728\u4e4b\u524d\u7684\u6587\u7ae0\u91cc\u5199\u4e86myisam\u8bfb\u6570\u636e\u538b\u7f29\u7684\u60c5\u51b5\uff0c\u6700\u8fd1\u51b3\u5b9a\u628a\u5b83\u7528\u5728\u751f\u4ea7\u73af\u5883\u4e0a\uff0c\u6240\u4ee5\u907f\u514d\u4e0d\u4e86\u5199\u4e00\u4e2a\u201c\u5b89\u5168\u201d\u7684\u5904\u7406\u811a\u672c\u653e\u5728DB\u670d\u52a1\u5668\u4e0a\uff0c\u8fd9\u5c31\u5f15\u5165\u4e86\u672c\u6587\u6240\u8ba8\u8bba\u7684\u8bdd\u9898\u3002 \u6211\u5e0c\u671b\u8fd9\u4e2abash\u811a\u672c\u5728\u9000\u51fa\u7684\u65f6\u5019\u505a\u4e00\u4e9b\u4e8b\u60c5\uff0c\u5305\u62ec\uff1a \u5b83\u542f\u52a8\u7684\u5207\u5230\u540e\u53f0\u7684job\u9700\u8981\u88ab\u6740\u6b7b\uff1b \u4e00\u4e9b\u4e34\u65f6\u6587\u4ef6\u7684\u6e05\u7406\u3002 \u5728\u8fd9\u4e2a\u811a\u672c\u91cc\u6211\u7528\u5230\u4e86trap\u8fd9\u4e2a\u547d\u4ee4\uff0c\u5173\u4e8e\u5b83\uff0c\u4f60\u53ef\u4ee5man\u4e00\u4e0b\uff0c\u6211\u8fd9\u91cc\u5c31\u4e0d\u5570\u55e6\u4e86\u3002\u76f4\u63a5\u4e0a\u793a\u4f8b\u4ee3\u7801\uff1a $ cat test_trap.sh declare -i run_terminate=0 trap &#8220;run_terminate=1&#8221; SIGINT SIGTERM # \u542f\u52a8io\u76d1\u63a7\uff0cIO\u8f83\u5927\u65f6\u4e0d\u8fdb\u884c\u538b\u7f29 vmstat 1 &amp;gt;&amp;gt; .\/a.log &amp;amp; while [ ${run_terminate} -eq 0 ] do # \u6838\u5fc3\u4ee3\u7801 sleep 30 done for pid in $(ps -ef | awk -v p=${$} &#8216;{if ($3 == p){print $2}}&#8217;) do kill -9 ${pid} &amp;gt; \/dev\/null done &hellip; <a href=\"https:\/\/www.strongd.net\/?p=636\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">bash\u4e0b\u5229\u7528trap\u6355\u6349\u4fe1\u53f7<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,19],"tags":[],"class_list":["post-636","post","type-post","status-publish","format-standard","hentry","category-linux","category-mysql"],"_links":{"self":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=636"}],"version-history":[{"count":1,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/636\/revisions"}],"predecessor-version":[{"id":637,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/636\/revisions\/637"}],"wp:attachment":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}