github.com/stolowski/snapd@v0.0.0-20210407085831-115137ce5a22/osutil/exitcode.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2014-2015 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package osutil
    21  
    22  import (
    23  	"os/exec"
    24  	"syscall"
    25  )
    26  
    27  // ExitCode extract the exit code from the error of a failed cmd.Run() or the
    28  // original error if its not a exec.ExitError
    29  func ExitCode(runErr error) (e int, err error) {
    30  	// TODO: with golang-1.12 this becomes a bit nicer:
    31  	//       https://github.com/golang/go/issues/26539
    32  	// golang, you are kidding me, right?
    33  	if exitErr, ok := runErr.(*exec.ExitError); ok {
    34  		waitStatus := exitErr.Sys().(syscall.WaitStatus)
    35  		e = waitStatus.ExitStatus()
    36  		return e, nil
    37  	}
    38  	return e, runErr
    39  }