How to capture the output of the terminal using Go?

Question

I want to create a simple program using Go that can get an output in the terminal output. For example:

echo "john" | goprogram

The output is hi john

When using command cat

cat list_name.txt | goprogram

The output using

hi doe
hi james
hi chris

Is there a way to do this using Go?

Write a program that reads from stdin. You can use fmt.Scan functions — Burak Serdar
– Burak Serdar, Commented Sep 13, 2021 at 3:03
Does this answer your question? How can I read from standard input in the console? — MenyT
– MenyT, Commented Sep 13, 2021 at 18:42

Penelope Stevens · Accepted Answer · 2021-09-13 03:27:55Z

1

Read from os.Stdin. Here's an example implementation of the Hi program.

package main

import (
    "bufio"
    "fmt"
    "log"
    "os"
)

func main() {
    s := bufio.NewScanner(os.Stdin)
    for s.Scan() {
        fmt.Println("hi", s.Text())
    }
    if s.Err() != nil {
        log.Fatal(s.Err())
    }
}

This program creates a scanner to read os.Stdin by line. For each line in stdin, the program prints "hi" and the line.

answered Sep 13, 2021 at 3:27

Penelope Stevens

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