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watchdog: add -T option

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function                                             old     new   delta
 watchdog_main                                        159     219     +60
mdev: support match by major,minor. See bug 4714.
 +100 bytes.
This commit is contained in:
Denis Vlasenko
2008-09-07 23:22:08 +00:00
parent ee9deb863e
commit 8d89bed840
7 changed files with 81 additions and 66 deletions
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59
miscutils/watchdog.c
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@ -4,14 +4,17 @@
*
* Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org>
* Copyright (C) 2006 Bernhard Fischer <busybox@busybox.net>
* Copyright (C) 2008 Darius Augulis <augulis.darius@gmail.com>
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
#include "libbb.h"
#include "linux/watchdog.h"
#define OPT_FOREGROUND 0x01
#define OPT_TIMER 0x02
#define OPT_FOREGROUND (1 << 0)
#define OPT_STIMER (1 << 1)
#define OPT_HTIMER (1 << 2)
static void watchdog_shutdown(int sig UNUSED_PARAM)
{
@ -26,38 +29,42 @@ static void watchdog_shutdown(int sig UNUSED_PARAM)
int watchdog_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int watchdog_main(int argc, char **argv)
{
static const struct suffix_mult suffixes[] = {
{ "ms", 1 },
{ "", 1000 },
{ }
};
unsigned opts;
unsigned timer_duration = 30000; /* Userspace timer duration, in milliseconds */
char *t_arg;
unsigned stimer_duration; /* how often to restart */
unsigned htimer_duration = 60000; /* reboots after N ms if not restarted */
char *st_arg;
char *ht_arg;
opt_complementary = "=1"; /* must have 1 argument */
opts = getopt32(argv, "Ft:", &t_arg);
opt_complementary = "=1"; /* must have exactly 1 argument */
opts = getopt32(argv, "Ft:T:", &st_arg, &ht_arg);
if (opts & OPT_TIMER) {
static const struct suffix_mult suffixes[] = {
{ "ms", 1 },
{ "", 1000 },
{ }
};
timer_duration = xatou_sfx(t_arg, suffixes);
}
if (!(opts & OPT_FOREGROUND)) {
bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
}
if (opts & OPT_HTIMER)
htimer_duration = xatou_sfx(ht_arg, suffixes);
stimer_duration = htimer_duration / 2;
if (opts & OPT_STIMER)
stimer_duration = xatou_sfx(st_arg, suffixes);
bb_signals(BB_FATAL_SIGS, watchdog_shutdown);
/* Use known fd # - avoid needing global 'int fd' */
xmove_fd(xopen(argv[argc - 1], O_WRONLY), 3);
// TODO?
// if (!(opts & OPT_TIMER)) {
// if (ioctl(fd, WDIOC_GETTIMEOUT, &timer_duration) == 0)
// timer_duration *= 500;
// else
// timer_duration = 30000;
// }
ioctl_or_warn(3, WDIOC_SETTIMEOUT, &htimer_duration);
#if 0
ioctl_or_warn(3, WDIOC_GETTIMEOUT, &htimer_duration);
printf("watchdog: SW timer is %dms, HW timer is %dms\n",
stimer_duration, htimer_duration * 1000);
#endif
if (!(opts & OPT_FOREGROUND)) {
bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
}
while (1) {
/*
@ -65,7 +72,7 @@ int watchdog_main(int argc, char **argv)
* is undefined at this point -- PFM
*/
write(3, "", 1); /* write zero byte */
usleep(timer_duration * 1000L);
usleep(stimer_duration * 1000L);
}
return EXIT_SUCCESS; /* - not reached, but gcc 4.2.1 is too dumb! */
}