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Randy Dunlap
authored and
Wim Van Sebroeck
committed
Jun 28, 2006
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--- | ||
refs/heads/master: dfc7bd9c385a888851a2d009ba272099549f98cc | ||
refs/heads/master: 56fb9e5346b99bc6b77def79b3739097bc13ea8a |
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#include <stdlib.h> | ||
#include <fcntl.h> | ||
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int main(int argc, const char *argv[]) { | ||
int fd = open("/dev/watchdog", O_WRONLY); | ||
if (fd == -1) { | ||
perror("watchdog"); | ||
exit(1); | ||
} | ||
while (1) { | ||
write(fd, "\0", 1); | ||
fsync(fd); | ||
sleep(10); | ||
} | ||
} |
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/* | ||
* Watchdog Driver Test Program | ||
*/ | ||
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#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <string.h> | ||
#include <unistd.h> | ||
#include <fcntl.h> | ||
#include <sys/ioctl.h> | ||
#include <linux/types.h> | ||
#include <linux/watchdog.h> | ||
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int fd; | ||
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/* | ||
* This function simply sends an IOCTL to the driver, which in turn ticks | ||
* the PC Watchdog card to reset its internal timer so it doesn't trigger | ||
* a computer reset. | ||
*/ | ||
void keep_alive(void) | ||
{ | ||
int dummy; | ||
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ioctl(fd, WDIOC_KEEPALIVE, &dummy); | ||
} | ||
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/* | ||
* The main program. Run the program with "-d" to disable the card, | ||
* or "-e" to enable the card. | ||
*/ | ||
int main(int argc, char *argv[]) | ||
{ | ||
fd = open("/dev/watchdog", O_WRONLY); | ||
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if (fd == -1) { | ||
fprintf(stderr, "Watchdog device not enabled.\n"); | ||
fflush(stderr); | ||
exit(-1); | ||
} | ||
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if (argc > 1) { | ||
if (!strncasecmp(argv[1], "-d", 2)) { | ||
ioctl(fd, WDIOC_SETOPTIONS, WDIOS_DISABLECARD); | ||
fprintf(stderr, "Watchdog card disabled.\n"); | ||
fflush(stderr); | ||
exit(0); | ||
} else if (!strncasecmp(argv[1], "-e", 2)) { | ||
ioctl(fd, WDIOC_SETOPTIONS, WDIOS_ENABLECARD); | ||
fprintf(stderr, "Watchdog card enabled.\n"); | ||
fflush(stderr); | ||
exit(0); | ||
} else { | ||
fprintf(stderr, "-d to disable, -e to enable.\n"); | ||
fprintf(stderr, "run by itself to tick the card.\n"); | ||
fflush(stderr); | ||
exit(0); | ||
} | ||
} else { | ||
fprintf(stderr, "Watchdog Ticking Away!\n"); | ||
fflush(stderr); | ||
} | ||
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while(1) { | ||
keep_alive(); | ||
sleep(1); | ||
} | ||
} |
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