treewide: auto-convert the simple cases to log_*_errno()

[thirdparty/systemd.git] / src / ac-power / ac-power.c

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
  This file is part of systemd.

  Copyright 2010 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include "util.h"

int main(int argc, char *argv[]) {
        int r;

        /* This is mostly intended to be used for scripts which want
         * to detect whether AC power is plugged in or not. */

        r = on_ac_power();
        if (r < 0) {
                log_error_errno(-r, "Failed to read AC status: %m");
                return EXIT_FAILURE;
        }

        return r != 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}