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Documentation/watchdog: Fix the file descriptor leak when no cmdline arg given 

we start a infinite loop when user gives ./watchdog-test, and when user
ctrl + c's the program, we just exit immeadiately with out closing the
filedescriptor of the watchdog device. a signal handler is used to
do the job of closing the filedescriptor and exiting the program.

Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Devendra Naga 2012-05-17 15:07:48 +05:30 committed by Wim Van Sebroeck
parent 3c2a6186c1
commit cad19fa664
1 changed files with 11 additions and 0 deletions
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11
Documentation/watchdog/src/watchdog-test.c
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@ -7,6 +7,7 @@
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#include <fcntl.h> #include <fcntl.h>
#include <signal.h>
#include <sys/ioctl.h> #include <sys/ioctl.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/watchdog.h> #include <linux/watchdog.h>
@ -29,6 +30,14 @@ static void keep_alive(void)
* The main program. Run the program with "-d" to disable the card, * The main program. Run the program with "-d" to disable the card,
* or "-e" to enable the card. * or "-e" to enable the card.
*/ */
void term(int sig)
{
close(fd);
fprintf(stderr, "Stopping watchdog ticks...\n");
exit(0);
}
int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {
int flags; int flags;
@ -65,6 +74,8 @@ int main(int argc, char *argv[])
fflush(stderr); fflush(stderr);
} }
signal(SIGINT, term);
while(1) { while(1) {
keep_alive(); keep_alive();
sleep(1); sleep(1);