* Mini watchdog implementation for busybox
*
* Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org>
+ * Copyright (C) 2006 Bernhard Fischer <busybox@busybox.net>
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
-#include <stdio.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <signal.h>
#include "busybox.h"
-/* Userspace timer duration, in seconds */
-static unsigned int timer_duration = 30;
+#define OPT_FOREGROUND 0x01
+#define OPT_TIMER 0x02
/* Watchdog file descriptor */
static int fd;
static void watchdog_shutdown(int ATTRIBUTE_UNUSED unused)
{
- write(fd, "V", 1); /* Magic */
+ write(fd, "V", 1); /* Magic, see watchdog-api.txt in kernel */
close(fd);
exit(0);
}
int watchdog_main(int argc, char **argv)
{
-
+ unsigned opts;
+ unsigned timer_duration = 30; /* Userspace timer duration, in seconds */
char *t_arg;
- unsigned long flags;
- flags = bb_getopt_ulflags(argc, argv, "t:", &t_arg);
- if (flags & 1)
- timer_duration = bb_xgetlarg(t_arg, 10, 0, INT_MAX);
+
+ opts = getopt32(argc, argv, "Ft:", &t_arg);
+
+ if (opts & OPT_TIMER)
+ timer_duration = xatou(t_arg);
/* We're only interested in the watchdog device .. */
if (optind < argc - 1 || argc == 1)
bb_show_usage();
- if (daemon(0, 1) < 0)
- bb_perror_msg_and_die("Failed forking watchdog daemon");
+#ifdef BB_NOMMU
+ if (!(opts & OPT_FOREGROUND))
+ vfork_daemon_rexec(0, 1, argc, argv, "-F");
+#else
+ xdaemon(0, 1);
+#endif
signal(SIGHUP, watchdog_shutdown);
signal(SIGINT, watchdog_shutdown);
- fd = bb_xopen(argv[argc - 1], O_WRONLY);
+ fd = xopen(argv[argc - 1], O_WRONLY);
while (1) {
/*