diff options
Diffstat (limited to 'shadow/lckpwdf.c')
| -rw-r--r-- | shadow/lckpwdf.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/shadow/lckpwdf.c b/shadow/lckpwdf.c index d21a744336..ffe157e119 100644 --- a/shadow/lckpwdf.c +++ b/shadow/lckpwdf.c @@ -86,6 +86,7 @@ __lckpwdf () struct sigaction saved_act; /* Saved signal action. */ sigset_t new_set; /* New set of caught signals. */ struct sigaction new_act; /* New signal action. */ + struct flock fl; /* Information struct for locking. */ int result; if (lock_fd != -1) @@ -139,7 +140,10 @@ __lckpwdf () alarm (TIMEOUT); /* Try to get the lock. */ - result = flock (lock_fd, LOCK_EX); + memset (&fl, '\0', sizeof (struct flock)); + fl.l_type = F_WRLCK; + fl.l_whence = SEEK_SET; + result = fcntl (lock_fd, F_SETLKW, &fl); RETURN_CLEAR_ALARM (result); } @@ -177,5 +181,5 @@ static void noop_handler (sig) int sig; { - /* We simply return which makes the `flock' call return with an error. */ + /* We simply return which makes the `fcntl' call return with an error. */ } |