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[WATCHDOG] Documentation/watchdog/src/watchdog-simple.c: improve this code
Make some improvements for Documentation/watchdog/src/watchdog-simple.c.
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
authored by WANG Cong and committed by Wim Van Sebroeck 06063e26 c283cf2c
+14
-4
Documentation/watchdog/src/watchdog-simple.c
+14
-4
Documentation/watchdog/src/watchdog-simple.c
···
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#include <unistd.h>
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#include <fcntl.h>
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int main(int argc, const char *argv[]) {
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int main(void)
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{
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int fd = open("/dev/watchdog", O_WRONLY);
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int ret = 0;
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if (fd == -1) {
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perror("watchdog");
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exit(1);
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exit(EXIT_FAILURE);
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}
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while (1) {
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write(fd, "\0", 1);
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fsync(fd);
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ret = write(fd, "\0", 1);
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if (ret != 1) {
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ret = -1;
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break;
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}
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ret = fsync(fd);
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if (ret)
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break;
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sleep(10);
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}
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close(fd);
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return ret;
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}