static unsigned eat_num(const char *p)
{
if (*p == '-')
p++;
else if (*p == '+') {
p++;
G.status = 1; /* mark that we saw "+" */
}
return xatou_sfx(p, tail_suffixes);
}
static unsigned eat_num(const char *p)
{
if (*p == '-')
p++;
else if (*p == '+') {
p++;
G.from_top = 1;
}
return xatou_sfx(p, head_tail_suffixes);
}
int watchdog_main(int argc, char **argv)
{
unsigned opts;
unsigned timer_duration = 30000; /* Userspace timer duration, in milliseconds */
char *t_arg;
opt_complementary = "=1"; /* must have 1 argument */
opts = getopt32(argv, "Ft:", &t_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);
}
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;
// }
while (1) {
/*
* Make sure we clear the counter before sleeping, as the counter value
* is undefined at this point -- PFM
*/
write(3, "", 1); /* write zero byte */
usleep(timer_duration * 1000L);
}
return EXIT_SUCCESS; /* - not reached, but gcc 4.2.1 is too dumb! */
}
static unsigned eat_num(const char *p)
{
if (*p == '-') p++;
else if (*p == '+') { p++; G.status = EXIT_FAILURE; }
return xatou_sfx(p, tail_suffixes);
}
int watchdog_main(int argc, char **argv)
{
static const struct suffix_mult suffixes[] = {
{ "ms", 1 },
{ "", 1000 },
{ "", 0 }
};
unsigned opts;
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 exactly 1 argument */
opts = getopt32(argv, "Ft:T:", &st_arg, &ht_arg);
/* We need to daemonize *before* opening the watchdog as many drivers
* will only allow one process at a time to do so. Since daemonizing
* is not perfect (child may run before parent finishes exiting), we
* can't rely on parent exiting before us (let alone *cleanly* releasing
* the watchdog fd -- something else that may not even be allowed).
*/
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);
/* WDIOC_SETTIMEOUT takes seconds, not milliseconds */
htimer_duration = htimer_duration / 1000;
#ifndef WDIOC_SETTIMEOUT
# error WDIOC_SETTIMEOUT is not defined, cannot compile watchdog applet
#else
# if defined WDIOC_SETOPTIONS && defined WDIOS_ENABLECARD
{
static const int enable = WDIOS_ENABLECARD;
ioctl_or_warn(3, WDIOC_SETOPTIONS, (void*) &enable);
}
# endif
ioctl_or_warn(3, WDIOC_SETTIMEOUT, &htimer_duration);
#endif
#if 0
ioctl_or_warn(3, WDIOC_GETTIMEOUT, &htimer_duration);
printf("watchdog: SW timer is %dms, HW timer is %ds\n",
stimer_duration, htimer_duration * 1000);
#endif
while (1) {
/*
* Make sure we clear the counter before sleeping,
* as the counter value is undefined at this point -- PFM
*/
write(3, "", 1); /* write zero byte */
usleep(stimer_duration * 1000L);
}
return EXIT_SUCCESS; /* - not reached, but gcc 4.2.1 is too dumb! */
}