Golang : Capture text return from exec function example
Problem:
You want to capture the text result return by exec function. How to do that?
Solution:
The code example below demonstrates how to capture the text result returns by the os/exec function. What the code does is to prepare in advance a pipe(io.ReadCloser) first before executing the exec program to capture the standard output. Then the value will be stored(appended) in a string slice for display at the end of the program.
Here you go!
package main
import (
"bufio"
"fmt"
"os"
"os/exec"
)
func handleError(err error) {
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
func main() {
cmd := exec.Command("whoami")
// capture the output and error pipes
stdout, err := cmd.StdoutPipe()
handleError(err)
err = cmd.Start()
handleError(err)
defer cmd.Wait()
buff := bufio.NewScanner(stdout)
var returnText []string
for buff.Scan() {
returnText = append(returnText, buff.Text())
}
fmt.Println(returnText)
}
Happy coding!
References:
See also : Golang : Capture stdout of a child process and act according to the result
By Adam Ng
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