// Copyright (c) 2014-2020 Canonical Ltd
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 3 as
// published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package osutil

import (
	"os/exec"
	"syscall"
)

// ExitCode extract the exit code from the error of a failed cmd.Run() or the
// original error if its not a exec.ExitError
func ExitCode(runErr error) (e int, err error) {
	// golang, you are kidding me, right?
	if exitErr, ok := runErr.(*exec.ExitError); ok {
		waitStatus := exitErr.Sys().(syscall.WaitStatus)
		e = waitStatus.ExitStatus()
		return e, nil
	}
	return e, runErr
}
