{"id":207876,"date":"2025-07-08T12:35:58","date_gmt":"2025-07-08T04:35:58","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207876\/"},"modified":"2025-07-08T12:35:58","modified_gmt":"2025-07-08T04:35:58","slug":"go%e7%ae%a1%e9%81%93%e5%86%99%e7%ab%af%e8%a2%ab%e5%85%b3%e9%97%ad%ef%bc%8c%e4%b8%ba%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207876\/","title":{"rendered":"Go\u7ba1\u9053\u5199\u7aef\u88ab\u5173\u95ed\uff0c\u4e3a\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>Go\u7ba1\u9053\u5199\u7aef\u88ab\u5173\u95ed\uff0c\u4e3a\u4ec0\u4e48\uff1f<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-26 12:00:36<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>Golang\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300aGo\u7ba1\u9053\u5199\u7aef\u88ab\u5173\u95ed\uff0c\u4e3a\u4ec0\u4e48\uff1f\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u521a\u521a\u8bfb\u4e86\u4e00\u4e9b go \u4ee3\u7801\uff0c\u5b83\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<pre>type someType struct {\n    ...\n    ...\n    rpipe io.ReadCloser\n    wpipe io.WriteCloser\n}\n\nvar inst someType\n\ninst.rpipe, inst.wpipe, _ := os.Pipe()\ncmd := exec.Command(\"some_binary\", args...)\ncmd.Stdout = inst.wpipe\ncmd.Stderr = inst.wpipe\nif err := cmd.Start(); err != nil {\n    ....\n}\ninst.wpipe.Close()\ninst.wpipe = nil<\/pre>\n<p><code>some_binary<\/code> \u662f\u4e00\u4e2a\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u8fdb\u7a0b\u3002<\/p>\n<ol>\n<li>\u4e3a\u4ec0\u4e48 <code>inst.wpipe<\/code> \u5173\u95ed\u5e76\u8bbe\u7f6e\u4e3a nil\uff1f\u5982\u679c\u4e0d\u5173\u95ed\u7684\u8bdd\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f\u5173\u95ed inst.wpipe \u662f\u5426\u5e38\u89c1\/\u6709\u5fc5\u8981\uff1f<\/li>\n<li><code>dup2(pipe_fd[1], 1)<\/code> \u662f <code>cmd.stdout = inst.wpipe; \u7684 c \u7c7b\u4f3c\u7269\u5417\uff1f inst.wpipe.close()<\/code>?<\/li>\n<\/ol>\n<p> <\/p>\n<h2>\u6b63\u786e\u7b54\u6848<\/h2>\n<p> <\/p>\n<p>\u8be5\u4ee3\u7801\u662f\u5178\u578b\u7684\u60f3\u8981\u8bfb\u53d6\u5176\u4ed6\u7a0b\u5e8f\u751f\u6210\u7684\u8f93\u51fa\u7684\u7a0b\u5e8f\u3002 \u51fd\u6570\u8fd4\u56de\u4e00\u5bf9\u8fde\u63a5\u7684 <code>os.file<\/code> \u5b9e\u4f53\uff08\u6216\u8005\uff0c\u53d1\u751f\u9519\u8bef\u65f6\uff0c\u4e0d\u5e94\u7b80\u5355\u5730\u5ffd\u7565\u8be5\u5b9e\u4f53\uff09\uff0c\u5176\u4e2d\u7b2c\u4e8c\u4e2a\uff08<code>w<\/code> \u6216 <code>wpipe<\/code>\uff09\u5b9e\u4f53\u4e0a\u7684\u5199\u5165\u5728\u7b2c\u4e00\u4e2a\u5b9e\u4f53\u4e0a\u663e\u793a\u4e3a\u53ef\u8bfb\u5b57\u8282\uff08 <code>r<\/code> \/ <code>rpipe<\/code>) \u5b9e\u4f53\u3002\u4f46\u662f\u2014\u2014\u8fd9\u662f\u7b2c\u4e00\u4e2a\u95ee\u9898\u7b54\u6848\u7684\u4e00\u534a\u5173\u952e\u2014\u2014\u8bfb\u8005\u5982\u4f55\u77e5\u9053\u6240\u6709\u4f5c\u8005\u4f55\u65f6\u5b8c\u6210\u5199\u4f5c\uff1f<\/p>\n<p>\u4e3a\u4e86\u8ba9\u8bfb\u53d6\u5668\u83b7\u5f97 eof \u6307\u793a\uff0c<em>\u6240\u6709<\/em>\u62e5\u6709\u6216\u6709\u6743\u8bbf\u95ee\u7ba1\u9053\u5199\u5165\u7aef\u7684\u5199\u5165\u5668<em>\u5fc5\u987b<\/em>\u8c03\u7528 <code>close<\/code> \u64cd\u4f5c\u3002\u901a\u8fc7\u5c06\u7ba1\u9053\u7684\u5199\u5165\u7aef\u4f20\u9012\u7ed9\u6211\u4eec\u4ee5 <code>cmd.start()<\/code> \u542f\u52a8\u7684\u7a0b\u5e8f\uff0c\u6211\u4eec\u5141\u8bb8\u8be5\u547d\u4ee4\u8bbf\u95ee\u7ba1\u9053\u7684\u5199\u5165\u7aef\u3002\u5f53\u8be5\u547d\u4ee4\u5173\u95ed\u8be5\u7ba1\u9053\u65f6\uff0c\u5177\u6709\u8bbf\u95ee\u6743\u9650\u7684\u5b9e\u4f53\u4e4b\u4e00\u5df2\u5173\u95ed\u8be5\u7ba1\u9053\u3002\u4f46\u53e6\u4e00\u4e2a\u5177\u6709\u8bbf\u95ee\u6743\u9650\u7684\u5b9e\u4f53\u5c1a\u672a\u5173\u95ed\u5b83\uff1a<em>\u6211\u4eec<\/em>\u62e5\u6709\u5199\u5165\u6743\u9650\u3002<\/p>\n<p>\u8981\u67e5\u770b eof\uff0c<em>\u6211\u4eec<\/em>\u5fc5\u987b\u4f7f\u7528 <code>wpipe.close()<\/code> \u5173\u95ed\u5bf9<em>\u6211\u4eec\u7684<\/em> <code>wpipe<\/code> \u7684\u8bbf\u95ee\u3002\u6240\u4ee5\u56de\u7b54\u524d\u534a\u90e8\u5206\uff1a<\/p>\n<ol>\n<li>\u4e3a\u4ec0\u4e48 <code>inst.wpipe<\/code> \u5173\u95ed\u5e76\u8bbe\u7f6e\u4e3a nil\uff1f<\/li>\n<\/ol>\n<p>set-to-<code>nil<\/code> \u90e8\u5206\u53ef\u80fd\u6709\u4e5f\u53ef\u80fd\u6ca1\u6709\u4efb\u4f55\u529f\u80fd\uff1b\u60a8\u5e94\u8be5\u68c0\u67e5\u5176\u4f59\u7684\u4ee3\u7801\u4ee5\u786e\u5b9a\u5b83\u662f\u5426\u6709\u6548\u3002<\/p>\n<ol>\n<li><code>dup2(pipe_fd[1], 1)<\/code> \u662f <code>cmd.stdout = inst.wpipe; \u7684 c \u7c7b\u4f3c\u7269\u5417\uff1f inst.wpipe.close()?<\/code><\/li>\n<\/ol>\n<p>\u4e0d\u5b8c\u5168\u662f\u3002 <code>dup2<\/code> \u7ea7\u522b\u5728 posix os \u533a\u57df\u4e2d\u8f83\u4f4e\uff0c\u800c <code>cmd.stdout<\/code> \u5904\u4e8e\u8f83\u9ad8\uff08\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u65e0\u5173\uff09\u7ea7\u522b\u3002 <code>cmd.start()<\/code> \u7684 posix \u5b9e\u73b0\u5c06\u5728\u8c03\u7528 <code>fork<\/code> \uff08\u6216\u7b49\u6548\u7684\u4e1c\u897f\uff09\u4e4b\u540e\u6700\u7ec8\u8c03\u7528 <code>dup2<\/code> \uff08\u6216\u7b49\u6548\u7684\u4e1c\u897f\uff09\u3002 <code>inst.wipe.close()<\/code> \u7684 posix \u7b49\u6548\u9879\u662f <code>close(wfd)<\/code>\uff0c\u5176\u4e2d <code>wfd<\/code> \u662f <code>wpipe<\/code> \u4e2d\u7684 posix \u6587\u4ef6\u7f16\u53f7\u3002<\/p>\n<p>\u5728\u6ca1\u6709\u4efb\u4f55\u66f4\u9ad8\u7ea7\u522b\u5305\u88c5\u7684 c \u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f1a\u6709\u7c7b\u4f3c\u7684\u5185\u5bb9\uff1a<\/p>\n<pre>int fds[2];\n\nif (pipe(fds) &lt; 0) ... handle error case ...\npid = fork();\nswitch (pid) {\ncase -1: ... handle error ...\n\ncase 0: \/* child *\/\n    if (dup2(fds[1], 1) &lt; 0 || dup2(fds[1], 2) &lt; 0) ... handle error ...\n    if (execve(prog, args, env) &lt; 0) ... handle error ...\n    \/* NOTREACHED *\/\n\ndefault: \/* parent *\/\n    if (close(fds[1]) &lt; 0) ... handle error ...\n    ... read from fds[0] ...\n}\n<\/pre>\n<p>\uff08\u5c3d\u7ba1\u5982\u679c\u6211\u4eec\u8db3\u591f\u4ed4\u7ec6\u5730\u68c0\u67e5 <code>close<\/code> \u4e2d\u7684\u9519\u8bef\uff0c\u6211\u4eec\u53ef\u80fd\u5e94\u8be5\u8db3\u591f\u4ed4\u7ec6\u5730\u68c0\u67e5 <code>pipe<\/code> \u7cfb\u7edf\u8c03\u7528\u662f\u5426\u7ed9\u6211\u4eec\u8fd4\u56de\u4e86\u63cf\u8ff0\u7b26 0 \u548c 1\uff0c\u6216\u8005 1 \u548c 2\uff0c\u6216\u8005 2 \u548c 3\uff0c\u5728\u8fd9\u91cc\uff0c\u4e5f\u8bb8\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u786e\u4fdd 0\u30011 \u548c 2 \u81f3\u5c11\u5bf9 <code>\/dev\/null<\/code> \u5f00\u653e\u6765\u66f4\u65e9\u5730\u5904\u7406\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aGo\u7ba1\u9053\u5199\u7aef\u88ab\u5173\u95ed\uff0c\u4e3a\u4ec0\u4e48\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207876","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207876","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207876"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207876\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}