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/* upstart
*
* Copyright © 2009 Canonical Ltd.
* Author: Scott James Remnant <scott@netsplit.com>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <utmpx.h>
#include <errno.h>
#include <unistd.h>
#include <nih/macros.h>
#include <nih/alloc.h>
#include <nih/main.h>
#include <nih/option.h>
#include <nih/logging.h>
#include <nih/error.h>
#include "utmp.h"
/**
* options:
*
* Command-line options accepted.
**/
static NihOption options[] = {
NIH_OPTION_LAST
};
int
main (int argc,
char *argv[])
{
char **args;
int runlevel;
int prevlevel;
nih_main_init (argv[0]);
nih_option_set_usage (_("[UTMP]"));
nih_option_set_synopsis (_("Output previous and current runlevel."));
nih_option_set_help (
_("The system /var/run/utmp file is used unless the alternate "
"file UTMP is given.\n"));
args = nih_option_parser (NULL, argc, argv, options, FALSE);
if (! args)
exit (1);
runlevel = NIH_SHOULD (utmp_get_runlevel (args[0], &prevlevel));
if (runlevel < 0) {
NihError *err;
err = nih_error_get ();
if (err->number == ESRCH) {
nih_message ("unknown");
} else {
nih_error ("%s: %s", args[0] ?: _PATH_UTMPX,
err->message);
}
nih_free (err);
exit (1);
} else if (runlevel == 'N') {
nih_message ("unknown");
exit (1);
}
nih_message ("%c %c", prevlevel, runlevel);
return 0;
}
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