Make some improvements for Documentation/watchdog/src/watchdog-simple.c.
CC: Wim Van Sebroeck <[email protected]>
Signed-off-by: WANG Cong <[email protected]>
---
Documentation/watchdog/src/watchdog-simple.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
Index: linux-2.6.23-rc9/Documentation/watchdog/src/watchdog-simple.c
===================================================================
--- linux-2.6.23-rc9.orig/Documentation/watchdog/src/watchdog-simple.c
+++ linux-2.6.23-rc9/Documentation/watchdog/src/watchdog-simple.c
@@ -3,15 +3,24 @@
#include <unistd.h>
#include <fcntl.h>
-int main(int argc, const char *argv[]) {
+int main(void) {
int fd = open("/dev/watchdog", O_WRONLY);
+ int ret = 0;
if (fd == -1) {
perror("watchdog");
- exit(1);
+ exit(EXIT_FAILURE);
}
while (1) {
- write(fd, "\0", 1);
- fsync(fd);
+ ret = write(fd, "\0", 1);
+ if (ret != 1) {
+ ret = -1;
+ break;
+ }
+ ret = fsync(fd);
+ if (ret)
+ break;
sleep(10);
}
+ close(fd);
+ return ret;
}
-
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