watchdog: don't use static variable

git-svn-id: svn://busybox.net/trunk/busybox@18107 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 9 insertions, 9 deletions

diff --git a/miscutils/watchdog.c b/miscutils/watchdog.c
index 9dbefb985..ed9026d9e 100644
--- a/miscutils/watchdog.c
+++ b/miscutils/watchdog.c
@@ -13,13 +13,12 @@
 #define OPT_FOREGROUND 0x01
 #define OPT_TIMER      0x02
 
-/* Watchdog file descriptor */
-static int fd;
-
-static void watchdog_shutdown(int ATTRIBUTE_UNUSED unused)
+static void watchdog_shutdown(int ATTRIBUTE_UNUSED sig) ATTRIBUTE_NORETURN;
+static void watchdog_shutdown(int ATTRIBUTE_UNUSED sig)
 {
-        write(fd, "V", 1);      /* Magic, see watchdog-api.txt in kernel */
-        close(fd);
+        write(3, "V", 1);       /* Magic, see watchdog-api.txt in kernel */
+        if (ENABLE_FEATURE_CLEAN_UP)
+                close(3);
         exit(0);
 }
 
@@ -49,18 +48,19 @@ int watchdog_main(int argc, char **argv)
         signal(SIGHUP, 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) {
                 /*
                  * Make sure we clear the counter before sleeping, as the counter value
                  * is undefined at this point -- PFM
                  */
-                write(fd, "\0", 1);
+                write(3, "", 1);
                 sleep(timer_duration);
         }
 
         watchdog_shutdown(0);
 
-        return EXIT_SUCCESS;
+        /* return EXIT_SUCCESS; */
 }