go 执行系统命令

 

 文档： go 执行命令的5种方法   https://zhuanlan.zhihu.com/p/296409942

 

package main

import (
    "bytes"
    "fmt"
    "log"
    "os/exec"
)

var cmd = `
echo hello 
echo world >&2
exit 4
`
func main() {
    cmd := exec.Command("sh","-c",cmd)
    var stdout, stderr bytes.Buffer
    cmd.Stdout = &stdout
    cmd.Stderr = &stderr
    err := cmd.Run()
    outStr, errStr := string(stdout.Bytes()), string(stderr.Bytes())
    fmt.Printf("out:\n%s\nerr:\n%s\n", outStr, errStr)
    if err != nil {
        log.Fatalf("cmd.Run() failed with %s\n", err)
    }
}

输出

out:
hello

err:
world

2022/04/17 19:22:40 cmd.Run() failed with exit status 4
exit status 1