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



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

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

By Adam Ng

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