Example of how to use stdout and stdin from other programs in golang
Requires go
go run parentprocess.go
Forked from jamesrr39/Golang program stdin stdout interaction.md
Created
January 28, 2019 07:18
-
-
Save VimleshS/7bba68f7263353921258e31b3313c234 to your computer and use it in GitHub Desktop.
Using stdout and stdin from other programs in Golang
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package main | |
| import ( | |
| "bufio" | |
| "io" | |
| "log" | |
| "os" | |
| "os/exec" | |
| ) | |
| func main() { | |
| cmd := exec.Command("./subprocess.sh") | |
| cmd.Stderr = os.Stderr | |
| stdin, err := cmd.StdinPipe() | |
| if nil != err { | |
| log.Fatalf("Error obtaining stdin: %s", err.Error()) | |
| } | |
| stdout, err := cmd.StdoutPipe() | |
| if nil != err { | |
| log.Fatalf("Error obtaining stdout: %s", err.Error()) | |
| } | |
| reader := bufio.NewReader(stdout) | |
| go func(reader io.Reader) { | |
| scanner := bufio.NewScanner(reader) | |
| for scanner.Scan() { | |
| log.Printf("Reading from subprocess: %s", scanner.Text()) | |
| stdin.Write([]byte("some sample text\n")) | |
| } | |
| }(reader) | |
| if err := cmd.Start(); nil != err { | |
| log.Fatalf("Error starting program: %s, %s", cmd.Path, err.Error()) | |
| } | |
| cmd.Wait() | |
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/bin/bash | |
| echo "Enter some text:" | |
| read -r input | |
| echo "you typed: $input" |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment