Golang : How to pipe input data to executing child process?

Problem : Your program is executing a child process via os/exec and you want to pipe input data to the executing process. Solution : Use the StdinPipe() method and issue a .Write([]byte(your data)) to input data to the executing child process. For example : package main import ( "fmt" "os/exec" ) func main() { cmd := exec.Command("cat") stdin, err := cmd.StdinPipe() stdin.Write([]byte("Hello World!")) // <------ here stdin.Close() if err != nil { panic(err) } data, err := cmd.Output() if err != nil { panic(err) } for k, v := range data { fmt.Printf("key : %v, value : %v \n", k, string(v)) } }

  See also : Golang : Pipe output from one os.Exec(shell command) to another command

Tags : golang input-pipe input-data os-exec

Adam Ng By Adam Ng

Get in touch at Google Plus or stay updated on Facebook.

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.

On Facebook