how can I get stdin to exec cmd in golang

Question

I have this code

subProcess := exec.Cmd{
    Path: execAble,
    Args: []string{
        fmt.Sprintf(\"-config=%s\", *configPath),
        fmt.Sprintf(\"-serverT         


        

Answer 1

There's now an updated example available in the Go docs: https://golang.org/pkg/os/exec/#Cmd.StdinPipe

If the subprocess doesn't continue before the stdin is closed, the io.WriteString() call needs to be wrapped inside an anonymous function:

func main() {
    cmd := exec.Command("cat")
    stdin, err := cmd.StdinPipe()
    if err != nil {
        log.Fatal(err)
    }

    go func() {
        defer stdin.Close()
        io.WriteString(stdin, "values written to stdin are passed to cmd's standard input")
    }()

    out, err := cmd.CombinedOutput()
    if err != nil {
        log.Fatal(err)
    }

    fmt.Printf("%s\n", out)
}