{"id":208155,"date":"2025-07-08T17:06:28","date_gmt":"2025-07-08T09:06:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208155\/"},"modified":"2025-07-08T17:06:28","modified_gmt":"2025-07-08T09:06:28","slug":"%e7%90%86%e8%a7%a3-go-%e7%9a%84-exec-output-%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208155\/","title":{"rendered":"\u7406\u89e3 Go \u7684 exec.Output() \u51fd\u6570"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u7406\u89e3 Go \u7684 exec.Output() \u51fd\u6570<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-29 17:00:35<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGolang\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u7406\u89e3 Go \u7684 exec.Output() \u51fd\u6570\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u6b63\u5728\u9605\u8bfb go \u7684 exec<\/code> \u6a21\u5757\u4e2d cmd<\/code> \u7c7b\u578b\u7684 output()<\/code> \u65b9\u6cd5\u7684\u6e90\u4ee3\u7801\uff08https:\/\/golang.org\/pkg\/os\/exec\/#cmd.output\uff09\uff1a<\/p>\n

\/\/ output runs the command and returns its standard output.\n\/\/ any returned error will usually be of type *exiterror.\n\/\/ if c.stderr was nil, output populates exiterror.stderr.\nfunc (c *cmd) output() ([]byte, error) {\n    if c.stdout != nil {\n        return nil, errors.new(\"exec: stdout already set\")\n    }\n    var stdout bytes.buffer\n    c.stdout = &stdout\n\n    captureerr := c.stderr == nil\n    if captureerr {\n        c.stderr = &prefixsuffixsaver{n: 32 << 10}\n    }\n\n    err := c.run()\n    if err != nil && captureerr {\n        if ee, ok := err.(*exiterror); ok {\n            ee.stderr = c.stderr.(*prefixsuffixsaver).bytes()\n        }\n    }\n    return stdout.bytes(), err\n}<\/pre>\n
\u6211\u6709\u70b9\u96be\u4ee5\u7406\u89e3\u8fd9\u90e8\u5206\uff1a<\/p>\n
if ee, ok := err.(*ExitError); ok {\n        ee.Stderr = c.Stderr.(*prefixSuffixSaver).Bytes()\n    }<\/pre>\n
\u636e\u6211\u4e86\u89e3\uff0cee<\/code> \u6307\u9488\u5c06\u4e0d\u518d\u4f4d\u4e8e if<\/code> \u5757\u672b\u5c3e\u7684\u8303\u56f4\u5185\uff0c\u5e76\u4e14\u7531\u4e8e if<\/code> \u5757\u7684\u4e3b\u4f53\u53ea\u662f\u8bbe\u7f6e\u6b64\u5b9e\u4f8b\u7684 stderr<\/code> \u5b57\u6bb5\uff0c\u56e0\u6b64\u8fd9\u662f\u6709\u7528\u7684\u552f\u4e00\u65b9\u6cd5\u662f\u901a\u8fc7\u526f\u4f5c\u7528\uff08\u6bd4\u5982\u5b9e\u9645\u7f16\u5199\u7f8e\u5316\u9519\u8bef\uff09\u3002\u4e0d\u8fc7\uff0c\u6211\u5e76\u6ca1\u6709\u7acb\u5373\u660e\u767d\u8fd9\u662f\u5982\u4f55\u53d1\u751f\u7684\u3002<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u672c\u8d28\u4e0a\u662f\u505a\u4ec0\u4e48\u7684\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
if ee, ok := err.(*ExitError); ok {<\/pre>\n
\u5982\u679c err<\/code> \u7684\u7c7b\u578b\u4e3a *exiterror<\/code>\uff0c\u5219 ee<\/code> \u5c06\u662f\u6307\u5411\u5b58\u50a8\u5728 err<\/code> \u4e2d\u7684 exiterror \u7684\u6307\u9488\u3002\u56e0\u6b64\uff0c\u5373\u4f7f ee<\/code> \u8d85\u51fa\u8303\u56f4\uff0c*exiterror<\/code> \u4ecd\u7136\u5b58\u5728\uff0c\u7531 err<\/code> \u6307\u51fa\uff0c\u5e76\u4e14\u5bf9\u5176\u6240\u505a\u7684\u4efb\u4f55\u66f4\u6539\u90fd\u5c06\u4fdd\u7559\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300a\u7406\u89e3 Go \u7684 exec.Output() \u51fd\u6570\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/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-208155","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208155","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=208155"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208155\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}