Golang: System Call

By Xah Lee. Date: .

To make a system call, use

import "os/exec"

First, build your command. e.g.

var cmd = exec.Command(cmdName, arg1, arg2)

Each arg should not contain any space.

then, you have several choices how you want to run it. The main choices are:

if you need to change dir before running the command, use

os.Chdir(path)

package main

// example of calling shell command

// cd to a given dir
// call ls -al
// print its output

import "fmt"
import "os"
import "os/exec"

func main() {

    var dirToRun = "/Users/xah/web/"
    var err = os.Chdir(dirToRun)
    if err != nil {
        panic(err)
    }

    var cmdName = "ls"

    var cmd = exec.Command(cmdName, "-a", "-l")

    output, err := cmd.Output()
    if err != nil {
        panic(err)
    }

    fmt.Printf("%v\n", string(output))

}

Reference

https://golang.org/pkg/os/exec/

If you have a question, put $5 at patreon and message me.

Golang

  1. Compile, Run
  2. Package, Import
  3. Comment
  4. Print
  5. String
  6. Rune
  7. Variable
  8. Zero Value
  9. Constant
  10. If Then Else
  11. Switch/Case
  12. Loop
  13. Basic Types
  14. Array
  15. Slice
  16. Map
  17. Struct
  18. Function
  19. regexp
  20. Read File
  21. Write to File
  22. Walk Dir
  23. Check File Exist
  24. System Call
  25. Get Script Path
  26. Pointer
  27. Defer
  28. Random Number

Examples

  1. match any regexp
  2. Validate Links
  3. Generate Sitemap

Reference

  1. Go Spec