GO语言学习-操作系统命令

Posted 2022-02-21 breaklinux

1.示例代码

package main

import (
    "fmt"
    "io"
    "os"
    "os/exec"
)


func main() 
    // "ls -la / " 默认阻塞方式运行
    // 学习参考地址: https://golang.google.cn/pkg/os/exec/
    cmd := exec.Command("bash","-c","ping www.baidu.com -c 8")
    //output,err := cmd.Output()  //默认阻塞方式运行
    stdout, err := cmd.StdoutPipe()
    if err == nil 
        cmd.Start()
        fmt.Println("started")
        io.Copy(os.Stdout,stdout)
    else 
        fmt.Println(err)
    
    cmd.Wait() //等待进程结束
    fmt.Println(cmd.ProcessState.ExitCode()) //获取进程推出信号

2.编译操作

bogon$ set GOOS=linux  #交叉编译
bogon$ go mod init testexec
go: creating new go.mod: module daySignal
go: to add module requirements and sums:
        go mod tidy
bogon$ go mod tidy
bogon$ go build

3.测试验证

bogon:testexec  lijianxing$ ./testexec 
started
PING www.a.shifen.com (110.242.68.4): 56 data bytes
64 bytes from 110.242.68.4: icmp_seq=0 ttl=54 time=15.166 ms
64 bytes from 110.242.68.4: icmp_seq=1 ttl=54 time=13.326 ms
64 bytes from 110.242.68.4: icmp_seq=2 ttl=54 time=18.166 ms
64 bytes from 110.242.68.4: icmp_seq=3 ttl=54 time=24.788 ms
64 bytes from 110.242.68.4: icmp_seq=4 ttl=54 time=18.982 ms
64 bytes from 110.242.68.4: icmp_seq=5 ttl=54 time=18.637 ms
64 bytes from 110.242.68.4: icmp_seq=6 ttl=54 time=13.384 ms
64 bytes from 110.242.68.4: icmp_seq=7 ttl=54 time=13.413 ms

--- www.a.shifen.com ping statistics ---
8 packets transmitted, 8 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 13.326/16.983/24.788/3.732 ms
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