{"id":47141,"date":"2023-01-05T02:40:55","date_gmt":"2023-02-19T17:58:20","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e8%b0%83%e6%9f%a5-go-%e7%9a%84-exec-command%e3%80%82\/"},"modified":"2024-01-15T12:18:23","modified_gmt":"2024-01-15T04:18:23","slug":"%e8%b0%83%e6%9f%a5-go-%e7%9a%84-exec-command%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e8%b0%83%e6%9f%a5-go-%e7%9a%84-exec-command%e3%80%82\/","title":{"rendered":"\u8c03\u67e5 Go \u7684 exec.Command"},"content":{"rendered":"<p>\u56e0\u4e3a\u6211\u6b63\u5728\u7f16\u5199\u4e00\u4e2a\u9891\u7e41\u6267\u884c\u547d\u4ee4\u7684\u5e93\uff0c\u6240\u4ee5\u6211\u60f3\u8981\u5145\u5206\u7406\u89e3exec.Command\u3002<br \/>\n\u6211\u60f3\u8981\u4ece\u5404\u4e2a\u65b9\u9762\u4ed4\u7ec6\u89c2\u5bdf\u5b83\u7684\u884c\u4e3a\u3002<\/p>\n<h1>\u6267\u884c\u201c\u5305\u201d\u7684\u6982\u8ff0\u3002<\/h1>\n<p>\u9996\u5148\u8ba9\u6211\u4eec\u6765\u7ffb\u8bd1\u4e00\u4e0b\u5b98\u65b9 Package exec \u7684\u6982\u8981\u3002<\/p>\n<blockquote><p>\u5305\u6267\u884c\u5c06\u6267\u884c\u5916\u90e8\u547d\u4ee4\u3002\u5b83\u5c01\u88c5\u4e86os.StartProcess\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u91cd\u5b9a\u5411stdin\u548cstdout\uff0c\u901a\u8fc7\u7ba1\u9053\u8fde\u63a5I\/O\uff0c\u5e76\u8fdb\u884c\u5176\u4ed6\u8c03\u6574\u3002<br \/>\n\u4e0eC\u548c\u5176\u4ed6\u8bed\u8a00\u7684\u7cfb\u7edf\u5e93\u8c03\u7528\u4e0d\u540c\uff0cos\/exec\u5305\u6709\u610f\u4e0d\u6267\u884c\u7cfb\u7edfshell\u3002\u5b83\u4e0d\u4f1a\u5c55\u5f00glob\u6a21\u5f0f\uff0c\u4e5f\u4e0d\u6267\u884c\u5176\u4ed6\u6269\u5c55\u3001\u7ba1\u9053\u548c\u91cd\u5b9a\u5411\u7b49shell\u4f1a\u6267\u884c\u7684\u64cd\u4f5c\u3002\u8be5\u5305\u7c7b\u4f3c\u4e8eC\u7684exec\u51fd\u6570\u65cf\u3002\u4e3a\u4e86\u5c55\u5f00glob\u6a21\u5f0f\uff0c\u76f4\u63a5\u8c03\u7528shell\u5e76\u5bf9\u5371\u9669\u8f93\u5165\u8fdb\u884c\u8f6c\u4e49\uff0c\u5e76\u4f7f\u7528path\/file\u5305\u7684Glob\u51fd\u6570\u3002\u73af\u5883\u53d8\u91cf\u7684\u5c55\u5f00\u4f7f\u7528os\u7684ExpandEnv\u51fd\u6570\u3002<br \/>\n\u793a\u4f8b\u662f\u9488\u5bf9Unix\u7cfb\u7edf\u8bbe\u8ba1\u7684\u3002\u5728Windows\u4e0a\u4e0d\u8d77\u4f5c\u7528\u3002\u5728Go Playground\u4e2d\u4e5f\u4e0d\u8d77\u4f5c\u7528\u3002<\/p><\/blockquote>\n<ul class=\"post-ul\">glob<\/ul>\n<h1>\u7b80\u5355\u7684\u4f7f\u7528\u65b9\u6cd5<\/h1>\n<p>\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u6267\u884c\u547d\u4ee4\uff0c\u5e76\u5e0c\u671b\u4ee5\u663e\u793a\u6807\u51c6\u8f93\u51fa\u548c\u9519\u8bef\u8f93\u51fa\u7684\u65b9\u5f0f\u5b8c\u6210\u4efb\u4f55\u64cd\u4f5c\u3002<\/p>\n<p>exec.Command() \u53ea\u662f\u7528\u6765\u521b\u5efa\u547d\u4ee4\u5e76\u4e0d\u4f1a\u6267\u884c\u3002\u53ea\u6709\u5728\u8c03\u7528Output() \u65b9\u6cd5\u65f6\u624d\u4f1a\u6267\u884c\u547d\u4ee4\uff0c\u7136\u540e\u8fd4\u56de\u6807\u51c6\u8f93\u51fa\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"n\">ls<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">exec<\/span><span class=\"o\">.<\/span><span class=\"n\">Command<\/span><span class=\"p\">(<\/span><span class=\"s\">\"ls\"<\/span><span class=\"p\">)<\/span><span class=\"o\">.<\/span><span class=\"n\">Output<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"hello ls:<\/span><span class=\"se\">\\n<\/span><span class=\"s\">%s :Error:<\/span><span class=\"se\">\\n<\/span><span class=\"s\">%v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">ls<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>hello ls:\r\ngo.mod\r\nmain.go\r\n<\/code><\/pre>\n<h1>\u8fd4\u56de\u6807\u51c6\u8f93\u51fa\u548c\u9519\u8bef\u8f93\u51fa<\/h1>\n<p>\u7136\u800c\uff0c\u5982\u679c\u8fd9\u6837\u505a\u7684\u8bdd\uff0c\u867d\u7136\u80fd\u77e5\u9053\u53d1\u751f\u4e86\u9519\u8bef\uff0c\u4f46\u9519\u8bef\u8f93\u51fa\u7684\u5185\u5bb9\u5374\u6ca1\u6709\u663e\u793a\u51fa\u6765\u3002\u56e0\u6b64\uff0c\u4f7f\u7528CombineOutput()\u51fd\u6570\u53ef\u4ee5\u540c\u65f6\u8fd4\u56de\u6807\u51c6\u8f93\u51fa\u548c\u9519\u8bef\u8f93\u51fa\u3002\u5982\u679c\u6309\u7167\u6b63\u5e38\u65b9\u5f0f\u64cd\u4f5c\uff0c\u8fd9\u4e2a\u547d\u4ee4\u662f\u65e0\u6cd5\u6267\u884c\u7684\uff0c\u4f46\u901a\u8fc7\u4f7f\u7528sh -c\u547d\u4ee4\u53ef\u4ee5\u7ed5\u8fc7\u8fd9\u4e2a\u95ee\u9898\u3002\u53e6\u5916\uff0c-c\u4e4b\u540e\u901a\u5e38\u5e94\u8be5\u7528\u5355\u5f15\u53f7\u62ec\u8d77\u6765\uff0c\u4f46\u662f\u6ca1\u6709\u62ec\u8d77\u6765\u7684\u5730\u65b9\u5f88\u6709\u8da3\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"n\">ps<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">exec<\/span><span class=\"o\">.<\/span><span class=\"n\">Command<\/span><span class=\"p\">(<\/span><span class=\"s\">\"sh\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-c\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"echo stdout; echo stderr 1&gt;&amp;2\"<\/span><span class=\"p\">)<\/span><span class=\"o\">.<\/span><span class=\"n\">CombinedOutput<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"hello ps -ef :<\/span><span class=\"se\">\\n<\/span><span class=\"s\">%s :Error:<\/span><span class=\"se\">\\n<\/span><span class=\"s\">%v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">ps<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>stderr\r\n :Error:\r\n&lt;nil&gt;\r\n<\/code><\/pre>\n<h1>\u83b7\u53d6\u6807\u51c6\u8f93\u51fa\u548c\u9519\u8bef\u8f93\u51fa\u7684\u8bfb\u53d6\u5668\u3002<\/h1>\n<p>\u5982\u679c\u60a8\u4e0d\u4ec5\u4ec5\u60f3\u83b7\u53d6\u6807\u51c6\u8f93\u51fa\u548c\u9519\u8bef\u8f93\u51fa\uff0c\u800c\u4e14\u60f3\u533a\u5206\u5b83\u4eec\uff0c\u60a8\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\u3002\u8fd9\u4e2a\u793a\u4f8b\u5b9e\u9645\u4e0a\u6ca1\u6709\u83b7\u53d6\u5230\u9519\u8bef\u8f93\u51fa\uff0c\u5bfc\u81f4\u8c03\u8bd5\u82b1\u8d39\u4e86\u4e00\u4e9b\u65f6\u95f4 &#8211; \u5728 bash \u4e2d\u662f\u6709\u6548\u7684\uff0c\u4f46\u5728 exec.Command \u4e2d\u5374\u65e0\u6548\u3002\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0cWindows \u7684 cmd \u4e5f\u53d1\u751f\u4e86\u76f8\u540c\u7684\u73b0\u8c61\u3002\u53ef\u4ee5\u60f3\u8c61\u5230\u662f\u7531\u4e8e\u5f15\u53f7\u7684\u8f6c\u4e49\u5bfc\u81f4\u7684\u3002\u56e0\u6b64\uff0c\u6211\u5728 StackOverflow \u4e0a\u63d0\u95ee\u4e86\u5982\u4f55\u5728 Go \u8bed\u8a00\u7684 exec.Command \u4e2d\u4f20\u9012\u5355\u5f15\u53f7\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"n\">cmd<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">exec<\/span><span class=\"o\">.<\/span><span class=\"n\">Command<\/span><span class=\"p\">(<\/span><span class=\"s\">\"kubectl\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"run\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"my-release-kafka-client\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"--restart='Never'\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"--image\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"docker.io\/bitnami\/kafka:2.7.0-debian-10-r68\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"--namespace\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"default\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"--command\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"--\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"sleep\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"infinity\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">var<\/span> <span class=\"n\">stdout<\/span> <span class=\"n\">bytes<\/span><span class=\"o\">.<\/span><span class=\"n\">Buffer<\/span>\r\n    <span class=\"k\">var<\/span> <span class=\"n\">stderr<\/span> <span class=\"n\">bytes<\/span><span class=\"o\">.<\/span><span class=\"n\">Buffer<\/span>\r\n    <span class=\"n\">cmd<\/span><span class=\"o\">.<\/span><span class=\"n\">Stdout<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">stdout<\/span>\r\n    <span class=\"n\">cmd<\/span><span class=\"o\">.<\/span><span class=\"n\">Stderr<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">stderr<\/span>\r\n    <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">cmd<\/span><span class=\"o\">.<\/span><span class=\"n\">Run<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Stdout: %s<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">stdout<\/span><span class=\"o\">.<\/span><span class=\"n\">String<\/span><span class=\"p\">())<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Stderr: %s<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">stderr<\/span><span class=\"o\">.<\/span><span class=\"n\">String<\/span><span class=\"p\">())<\/span>\r\n    <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Stdout: %s<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">stdout<\/span><span class=\"o\">.<\/span><span class=\"n\">String<\/span><span class=\"p\">())<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>$ go run main.go \r\nStdout: \r\nStderr: error: invalid restart policy: 'Never'\r\nSee 'kubectl run -h' for help and examples\r\n<\/code><\/pre>\n<h1>\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4<\/h1>\n<p>\u5982\u679c\u8981\u7f16\u5199\u4e00\u4e2a\u6267\u884c\u547d\u4ee4\u7684\u7a0b\u5e8f\uff0c\u5e76\u4e14\u5b58\u5728\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u547d\u4ee4\uff0c\u53ef\u80fd\u5e0c\u671b\u5728\u4e00\u5b9a\u65f6\u95f4\u5185\u8bbe\u7f6e\u8d85\u65f6\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528exec.CommandContext()\u3002\u770b\u8d77\u6765\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"n\">cancel<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">WithTimeout<\/span><span class=\"p\">(<\/span><span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Background<\/span><span class=\"p\">(),<\/span> <span class=\"m\">100<\/span><span class=\"o\">*<\/span><span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Microsecond<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">defer<\/span> <span class=\"n\">cancel<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">output<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">exec<\/span><span class=\"o\">.<\/span><span class=\"n\">CommandContext<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"sleep\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"5\"<\/span><span class=\"p\">)<\/span><span class=\"o\">.<\/span><span class=\"n\">CombinedOutput<\/span><span class=\"p\">();<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Exceed the timeout 100ms. %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Combine Output: %s<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">output<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>Exceed the timeout 100ms. signal: killed\r\nCombine Output: \r\n<\/code><\/pre>\n<h1>\u6211\u60f3\u8981\u4f7f\u7528\u7ba1\u9053<\/h1>\n<p>\u5f53\u6211\u4eec\u60f3\u8981\u4f7f\u7528\u7ba1\u9053\u65f6\uff0c\u8be5\u600e\u4e48\u529e\u5462\uff1f\u5982\u679c\u968f\u4fbf\u5199\uff0c\u4f1a\u51fa\u73b0\u660e\u663e\u7684\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"n\">output<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">exec<\/span><span class=\"o\">.<\/span><span class=\"n\">Command<\/span><span class=\"p\">(<\/span><span class=\"s\">\"ps -ef | grep jvm\"<\/span><span class=\"p\">)<\/span><span class=\"o\">.<\/span><span class=\"n\">CombinedOutput<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"CombineOutput: %s, Error: %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">output<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>CombineOutput: , Error: exec: \"ps -ef | grep jvm\": executable file not found in $PATH\r\n<\/code><\/pre>\n<p>\u8fd9\u6837\u5c31\u5b8c\u7f8e\u4e86<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"n\">output<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">=<\/span> <span class=\"n\">exec<\/span><span class=\"o\">.<\/span><span class=\"n\">Command<\/span><span class=\"p\">(<\/span><span class=\"s\">\"sh\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-c\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"ps -ef | grep jvm\"<\/span><span class=\"p\">)<\/span><span class=\"o\">.<\/span><span class=\"n\">CombinedOutput<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"CombineOutput: %s, Error: %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">output<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>CombineOutput: ushio    30477 30451  0 01:01 pts\/8    00:00:00 sh -c ps -ef | grep jvm\r\nushio    30479 30477  0 01:01 pts\/8    00:00:00 grep jvm\r\n<\/code><\/pre>\n<h1>\u6807\u51c6\u9519\u8bef\u7ba1\u9053<\/h1>\n<p>\u8fd4\u56de StdErrorPipe io.ReadCloser\u3002\u5373\u6240\u8c13\u7684\u6d41\u3002\u5f53\u7136\uff0c\u8fd8\u6709 StdOutPipe \u5b58\u5728\u3002\u91cd\u70b9\u5728\u4e8e\u4f7f\u7528 cmd.Start() \u548c cmd.Wait()\u3002Start() \u7528\u4e8e\u6267\u884c\u547d\u4ee4\uff0c\u4f46\u4e0d\u4f1a\u7b49\u5f85\u3002\u56e0\u6b64\uff0c\u5728 Wait() \u4e2d\u7b49\u5f85\u3002\u8fd9\u4e2a StdErrorPipe \u5728 Wait() \u4e4b\u524d\u5fc5\u987b\u6267\u884c\uff0c\u56e0\u4e3a Wait() \u4f1a\u5173\u95ed io.ReadCloser\u3002\u9664\u6b64\u4e4b\u5916\u8fd8\u6709 cmd.Run() \u8fd9\u4e2a\u547d\u4ee4\uff0c\u5b83\u5728\u5185\u90e8\u8c03\u7528\u4e86 cmd.Start() \u548c cmd.Wait()\uff0c\u662f\u4e00\u79cd\u59cb\u7ec8\u7b49\u5f85\u7684\u7c7b\u578b\u3002\u4e0d\u8fc7\uff0c\u6309\u7167\u8fd9\u4e2a\u903b\u8f91\uff0c\u5c31\u4e0d\u80fd\u4f7f\u7528 StdErrorPipe\u4e86\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"n\">cmd<\/span> <span class=\"o\">=<\/span> <span class=\"n\">exec<\/span><span class=\"o\">.<\/span><span class=\"n\">Command<\/span><span class=\"p\">(<\/span><span class=\"s\">\"sh\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-c\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"echo stdout; echo 1&gt;&amp;2 stderr\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">stdErrorPipe<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">cmd<\/span><span class=\"o\">.<\/span><span class=\"n\">StderrPipe<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Fatal<\/span><span class=\"p\">(<\/span><span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">cmd<\/span><span class=\"o\">.<\/span><span class=\"n\">Start<\/span><span class=\"p\">();<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Fatal<\/span><span class=\"p\">(<\/span><span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"n\">slurp<\/span><span class=\"p\">,<\/span> <span class=\"n\">_<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">ioutil<\/span><span class=\"o\">.<\/span><span class=\"n\">ReadAll<\/span><span class=\"p\">(<\/span><span class=\"n\">stdErrorPipe<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"stderr: %s<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">slurp<\/span><span class=\"p\">)<\/span>\r\n\r\n    <span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">cmd<\/span><span class=\"o\">.<\/span><span class=\"n\">Wait<\/span><span class=\"p\">();<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Fatal<\/span><span class=\"p\">(<\/span><span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u7528\u4e8e\u8c03\u8bd5\u7684 String() \u65b9\u6cd5<\/h1>\n<p>\u5c3d\u7ba1\u660e\u786e\u5199\u7740\u4ec5\u7528\u4e8e\u8c03\u8bd5\u5e76\u4e0d\u9002\u7528\u4e8e\u751f\u4ea7\u73af\u5883\uff0c\u4f46\u4f3c\u4e4e\u8fd8\u6709\u4e00\u4e2a\u540d\u4e3aString()\u7684\u51fd\u6570\u3002\u4e0d\u77e5\u4e3a\u4f55\uff0c\u5b83\u8fd4\u56de\u4e86\u547d\u4ee4\u7684\u7edd\u5bf9\u8def\u5f84\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"n\">pwd<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">exec<\/span><span class=\"o\">.<\/span><span class=\"n\">Command<\/span><span class=\"p\">(<\/span><span class=\"s\">\"ps\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-ef\"<\/span><span class=\"p\">)<\/span><span class=\"o\">.<\/span><span class=\"n\">String<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"hello ps:<\/span><span class=\"se\">\\n<\/span><span class=\"s\">%s<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">pwd<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>hello ps:\r\n\/usr\/bin\/ps -ef\r\n<\/code><\/pre>\n<h1>\u603b\u7ed3<\/h1>\n<p>\u56e0\u4e3a\u57fa\u672c\u4e0a\u8986\u76d6\u4e86\u6211\u60f3\u505a\u7684\u4e8b\u60c5\uff0c\u6240\u4ee5\u6211\u5e94\u8be5\u80fd\u591f\u5feb\u901f\u7f16\u5199\u4ee3\u7801\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u56e0\u4e3a\u6211\u6b63\u5728\u7f16\u5199\u4e00\u4e2a\u9891\u7e41\u6267\u884c\u547d\u4ee4\u7684\u5e93\uff0c\u6240\u4ee5\u6211\u60f3\u8981\u5145\u5206\u7406\u89e3exec.Command\u3002 \u6211\u60f3\u8981\u4ece\u5404\u4e2a\u65b9\u9762\u4ed4\u7ec6\u89c2\u5bdf\u5b83\u7684 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47141","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u8c03\u67e5 Go \u7684 exec.Command - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u8c03\u67e5-go-\u7684-exec-command\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u8c03\u67e5 Go \u7684 exec.Command\" \/>\n<meta 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