Q:

Golang program to execute a specified shell command without options

belongs to collection: Golang Shell Script Programs

YasminRadwan26
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2022-07-05
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Here, we will execute a specified command without any option using the syscall.Exec() function. And, we will execute the "ls" shell command and print output on the console screen.

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YasminRadwan26
2022-07-05
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Program/Source Code:

The source code to execute a specified shell command without options is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Golang program to execute specified
// shell command without options

package main

import "os"
import "os/exec"
import "syscall"

func main() {
	command, err := exec.LookPath("ls")
	if err != nil {
		panic(err)
	}

	args := []string{"ls"}

	err = syscall.Exec(command, args, os.Environ())
	if err != nil {
		panic(err)
	}
}

Output:

bin
dev
etc
home
lib
lib64
proc
root
sys
tmp
tmpfs
usr
var

Explanation:

In the above program, we declare the package main. The main package is used to tell the Go language compiler that the package must be compiled and produced the executable file. Here, we imported the required packages to predefined functions.

In the main() function, we checked "ls" command exists or not, using the exec.LookPath() function and get the handle for the command. After that, we executed the specified command using the syscall.Exec() function and print the output of the "ls" command on the console screen.

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Golang Shell Script Programs
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