{"id":207761,"date":"2025-07-08T10:41:06","date_gmt":"2025-07-08T02:41:06","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207761\/"},"modified":"2025-07-08T10:41:06","modified_gmt":"2025-07-08T02:41:06","slug":"%e8%bf%90%e8%a1%8c%e8%b6%85%e6%97%b6%e5%91%bd%e4%bb%a4%e5%b9%b6%e5%9c%a8-go-%e4%b8%ad%e4%b8%80%e6%ac%a1%e8%af%bb%e5%8f%96%e4%b8%80%e8%a1%8c-stdout","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207761\/","title":{"rendered":"\u8fd0\u884c\u8d85\u65f6\u547d\u4ee4\u5e76\u5728 go \u4e2d\u4e00\u6b21\u8bfb\u53d6\u4e00\u884c stdout"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u8fd0\u884c\u8d85\u65f6\u547d\u4ee4\u5e76\u5728 go \u4e2d\u4e00\u6b21\u8bfb\u53d6\u4e00\u884c stdout<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-25 13:48:35<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u8fd0\u884c\u8d85\u65f6\u547d\u4ee4\u5e76\u5728 go \u4e2d\u4e00\u6b21\u8bfb\u53d6\u4e00\u884c stdout\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

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

\u6211\u60f3\u8fd0\u884c\u4e00\u4e2a\u547d\u4ee4\u5e76\u6253\u5370\u5176 stdout<\/code> \u4e2d\u7684\u6bcf\u4e00\u884c\uff08\u5f53\u5b83\u53ef\u7528\u65f6\uff09\u3002\u6b64\u5916\uff0c\u5982\u679c\u547d\u4ee4\u5728 n \u79d2\u5185\u6ca1\u6709\u5b8c\u6210\uff0c\u6211\u4e5f\u60f3\u7ec8\u6b62\u5b83\u3002<\/p>\n

\u6709\u4e00\u4e9b\u5728 golang \u4e2d\u5b9e\u73b0\u8d85\u65f6\u7684\u793a\u4f8b\uff08\u7279\u522b\u662f\u5728 golang \u4e2d\u7ec8\u6b62\u4f7f\u7528 os\/exec \u542f\u52a8\u7684\u8fdb\u7a0b\uff09\u3002\u6211\u5728 select<\/code> \u4e2d\u6709\u4e00\u4e2a time.after()<\/code> \u5b50\u53e5\uff0c\u6211\u5e0c\u671b\u5728 2 \u79d2\u540e\u547d\u4e2d\uff0c\u6b64\u65f6 runtraceroute<\/code> \u5e94\u8be5\u8fd4\u56de – \u4f46\u8fd9\u4e0d\u4f1a\u53d1\u751f\u3002 <\/p>\n

\u6211\u7684\u4ee3\u7801\u5982\u4e0b\uff08\u4ee5\u53ca\u6b63\u5728\u8fdb\u884c\u7684\u6f14\u793a\uff1ahttp:\/\/play.golang.org\/p\/d4acoawemt\uff09<\/p>\n

package main\n\nimport (\n    \"bufio\"\n    \"fmt\"\n    \"log\"\n    \"os\"\n    \"os\/exec\"\n    \"time\"\n)\n\nfunc runtraceroute(host string) {\n    errch := make(chan error, 1)\n    cmd := exec.command(\"\/usr\/bin\/traceroute\", host)\n    stdout, err := cmd.stdoutpipe()\n    if err != nil {\n        log.fatal(err)\n    }\n    if err := cmd.start(); err != nil {\n        log.fatal(err)\n    }\n    go func() {\n        errch <- cmd.wait()\n    }()\n    select {\n    case <-time.after(time.second * 2):\n        log.println(\"timeout hit..\")\n        return\n    case err := <-errch:\n        if err != nil {\n            log.println(\"traceroute failed:\", err)\n        }\n    default:\n        for _, char := range \"|\/-\\\\\" {\n            fmt.printf(\"\\r%s...%c\", \"running traceroute\", char)\n            time.sleep(100 * time.millisecond)\n        }\n        scanner := bufio.newscanner(stdout)\n        fmt.println(\"\")\n        for scanner.scan() {\n            line := scanner.text()\n            log.println(line)\n        }\n    }\n}\n\nfunc main() {\n    runtraceroute(os.args[1])\n}<\/pre>\n
\u8f93\u51fa\uff08\u526a\u6389\u672c\u5730 ip \u5730\u5740\u548c\u7f51\u5173\u7684\u524d\u51e0\u884c\uff09\uff1a<\/p>\n
$ go run pipe.go xinhua.com\nRunning traceroute...\\\n2016\/04\/01 11:16:43 traceroute to xinhua.com (58.64.200.76), 30 hops max, 60 byte packets\n.......\n.......\n.....More deleted lines.....\n\n2016\/04\/01 11:16:49 12  * * *\n2016\/04\/01 11:16:49 13  4.68.63.214 (4.68.63.214)  3.208 ms  3.176 ms  3.241 ms\n2016\/04\/01 11:16:49 14  * * *\n2016\/04\/01 11:16:49 15  if-ae-9-2.tcore1.TV2-Tokyo.as6453.net (180.87.180.18)  160.314 ms  158.837 ms  161.438 ms\n2016\/04\/01 11:16:49 16  if-ae-5-7.tcore1.HK2-Hong-Kong.as6453.net (180.87.112.189)  157.497 ms if-ae-3-2.tcore1.HK2-Hong-Kong.as6453.net (180.87.112.5)  161.397 ms if-ae-5-7.tcore1.HK2-Hong-Kong.as6453.net (180.87.112.189)  159.351 ms\n2016\/04\/01 11:16:49 17  if-ge-10-0-0-1128.core1.undefined.as6453.net (180.87.160.73)  156.412 ms  156.522 ms if-ge-14-0-0-1126.core1.undefined.as6453.net (180.87.112.30)  156.605 ms\n2016\/04\/01 11:16:49 18  * * *\n2016\/04\/01 11:16:49 19  * * *\n2016\/04\/01 11:16:49 20  * * *\n2016\/04\/01 11:16:49 21  113.10.229.113 (113.10.229.113)  165.578 ms  165.818 ms  163.451 ms\n2016\/04\/01 11:16:49 22  113.10.229.74 (113.10.229.74)  163.564 ms ae5.10g-idc.wpc.nwtgigalink.com (113.10.229.66)  162.384 ms 113.10.229.74 (113.10.229.74)  167.026 ms\n2016\/04\/01 11:16:49 23  113.10.230.162 (113.10.230.162)  162.988 ms  162.777 ms  163.807 ms\n2016\/04\/01 11:16:49 24  58.64.160.164 (58.64.160.164)  161.902 ms  162.396 ms  164.986 ms\n2016\/04\/01 11:16:54 25  * * *\n2016\/04\/01 11:16:54 26  58.64.200.76 (58.64.200.76)  162.178 ms !X  162.509 ms !X  162.356 ms !X<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u6211\u8ba4\u4e3a\u4f60\u60f3\u5c06 default:<\/code> \u6848\u4f8b\u7684\u4e3b\u4f53\u653e\u5165 goroutine \u4e2d\uff1b\u6211\u6000\u7591\u5b83\u4f1a\u963b\u6b62\u60a8\u7684 case <-time.after(time.second * 2):<\/code> \u6807\u7b7e\u88ab\u51fb\u4e2d\u3002<\/p>\n
\u53e6\u5916\uff0c\u8bf7\u8bb0\u4f4f time.after<\/code> \u5e76\u4e0d\u4fdd\u8bc1\u5b83\u4f1a\u5728\u8be5\u6301\u7eed\u65f6\u95f4\u4e4b\u540e\u51c6\u786e\u547d\u4e2d\uff0c\u5b83\u53ea\u662f\u8bf4\u5728\u8be5\u6301\u7eed\u65f6\u95f4\u4e4b\u540e\u7684\u4efb\u4f55\u65f6\u95f4\u5b83\u5c06\u5728\u901a\u9053\u4e0a\u53d1\u9001\u4fe1\u53f7\uff0c\u8fd9\u53ef\u80fd\u662f\u5728\u6307\u5b9a\u7684\u6301\u7eed\u65f6\u95f4\u3002\u8bf7\u53c2\u9605\u5e95\u5c42\u6587\u6863 <\/p>\n
\u6211\u4fee\u6539\u4e86\u4f60\u7684\u793a\u4f8b\uff1a<\/p>\n
package main\n\nimport (\n    \"bufio\"\n    \"fmt\"\n    \"log\"\n    \"os\/exec\"\n    \"time\"\n)\n\nfunc RunTraceroute(host string) {\n    errch := make(chan error, 1)\n    cmd := exec.Command(\"\/usr\/bin\/traceroute\", host)\n\n    stdout, err := cmd.StdoutPipe()\n    if err != nil {\n        log.Fatal(err)\n    }\n\n    if err := cmd.Start(); err != nil {\n        log.Fatal(err)\n    }\n\n    go func() {\n        errch <- cmd.Wait()\n    }()\n\n    go func() {\n        for _, char := range \"|\/-\\\\\" {\n            fmt.Printf(\"\\r%s...%c\", \"Running traceroute\", char)\n            time.Sleep(100 * time.Millisecond)\n        }\n        scanner := bufio.NewScanner(stdout)\n        fmt.Println(\"\")\n        for scanner.Scan() {\n            line := scanner.Text()\n            log.Println(line)\n        }\n    }()\n\n    select {\n    case <-time.After(time.Second * 1):\n        log.Println(\"Timeout hit..\")\n        return\n    case err := <-errch:\n        if err != nil {\n            log.Println(\"traceroute failed:\", err)\n        }\n    }\n}\n\nfunc main() {\n    RunTraceroute(\"8.8.8.8\")\n}<\/pre>\n
\u8fd9\u5bf9\u6211\u6709\u7528<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300a\u8fd0\u884c\u8d85\u65f6\u547d\u4ee4\u5e76\u5728 go \u4e2d\u4e00\u6b21\u8bfb\u53d6\u4e00\u884c stdout\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-207761","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207761","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=207761"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207761\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}