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How to execute bash code in Golang
Chinweuba Elijah AzubuikeOverview
In this course, we are going to learn how to execute a
Example code
package main
import (
"fmt"
"os/exec"
)
func main() {
app := "echo"
arg0 := "-e"
arg1 := "Hello world"
arg2 := "\n\tfrom"
arg3 := "golang"
cmd := exec.Command(app, arg0, arg1, arg2, arg3)
stdout, err := cmd.Output()
if err != nil {
fmt.Println(err.Error())
return
}
// Print the output
fmt.Println(string(stdout))
}Explanation
In the example above:
-
Line 3-6: We import the packages (
fmt,os/exec) we need to execute the bash code. We use thefmtto output our result and theexecto run our commands. -
Line 9-14: We declare and assign a
stringto variables. -
Line 16: We assign the
cmdvariable and run the command by chainingCommand()toexec.
Note: Package
execruns external commands. It wrapsos.StartProcessto make it easier to remapstdinandstdout, to connect I/O with pipes, and to do other adjustments.
We then access the output()
from cmd to obtain the output
via commands.
- Line 25: We obtain the output.
RELATED TAGS
bash code
golang
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