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watchdog: don't use static variable

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This commit is contained in:
Denis Vlasenko 2007-03-14 21:55:41 +00:00
parent 1ce190b7c1
commit cfa2b3a209
1 changed files with 9 additions and 9 deletions
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18
miscutils/watchdog.c
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@ -13,13 +13,12 @@
#define OPT_FOREGROUND 0x01 #define OPT_FOREGROUND 0x01
#define OPT_TIMER 0x02 #define OPT_TIMER 0x02
/* Watchdog file descriptor */ static void watchdog_shutdown(int ATTRIBUTE_UNUSED sig) ATTRIBUTE_NORETURN;
static int fd; static void watchdog_shutdown(int ATTRIBUTE_UNUSED sig)
static void watchdog_shutdown(int ATTRIBUTE_UNUSED unused)
{ {
write(fd, "V", 1); /* Magic, see watchdog-api.txt in kernel */ write(3, "V", 1); /* Magic, see watchdog-api.txt in kernel */
close(fd); if (ENABLE_FEATURE_CLEAN_UP)
close(3);
exit(0); exit(0);
} }
@ -49,18 +48,19 @@ int watchdog_main(int argc, char **argv)
signal(SIGHUP, watchdog_shutdown); signal(SIGHUP, watchdog_shutdown);
signal(SIGINT, watchdog_shutdown); signal(SIGINT, watchdog_shutdown);
fd = xopen(argv[argc - 1], O_WRONLY); /* Use known fd # - avoid needing global 'int fd' */
dup2(xopen(argv[argc - 1], O_WRONLY), 3);
while (1) { while (1) {
/* /*
* Make sure we clear the counter before sleeping, as the counter value * Make sure we clear the counter before sleeping, as the counter value
* is undefined at this point -- PFM * is undefined at this point -- PFM
*/ */
write(fd, "\0", 1); write(3, "", 1);
sleep(timer_duration); sleep(timer_duration);
} }
watchdog_shutdown(0); watchdog_shutdown(0);
return EXIT_SUCCESS; /* return EXIT_SUCCESS; */
} }