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-rw-r--r--test/nptl/tst-flock2.c260
1 files changed, 260 insertions, 0 deletions
diff --git a/test/nptl/tst-flock2.c b/test/nptl/tst-flock2.c
new file mode 100644
index 000000000..8ef3206cc
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+++ b/test/nptl/tst-flock2.c
@@ -0,0 +1,260 @@
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/file.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t lock2 = PTHREAD_MUTEX_INITIALIZER;
+static int fd;
+
+
+static void *
+tf (void *arg)
+{
+ struct flock fl =
+ {
+ .l_type = F_WRLCK,
+ .l_start = 0,
+ .l_whence = SEEK_SET,
+ .l_len = 10
+ };
+ if (TEMP_FAILURE_RETRY (fcntl (fd, F_SETLKW, &fl)) != 0)
+ {
+ puts ("fourth fcntl failed");
+ exit (1);
+ }
+
+ pthread_mutex_unlock (&lock);
+
+ pthread_mutex_lock (&lock2);
+
+ return NULL;
+}
+
+
+static int
+do_test (void)
+{
+ char tmp[] = "/tmp/tst-flock2-XXXXXX";
+
+ fd = mkstemp (tmp);
+ if (fd == -1)
+ {
+ puts ("mkstemp failed");
+ return 1;
+ }
+
+ unlink (tmp);
+
+ int i;
+ for (i = 0; i < 20; ++i)
+ write (fd, "foobar xyzzy", 12);
+
+ pthread_barrier_t *b;
+ b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
+ MAP_SHARED, fd, 0);
+ if (b == MAP_FAILED)
+ {
+ puts ("mmap failed");
+ return 1;
+ }
+
+ pthread_barrierattr_t ba;
+ if (pthread_barrierattr_init (&ba) != 0)
+ {
+ puts ("barrierattr_init failed");
+ return 1;
+ }
+
+ if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
+ {
+ puts ("barrierattr_setpshared failed");
+ return 1;
+ }
+
+ if (pthread_barrier_init (b, &ba, 2) != 0)
+ {
+ puts ("barrier_init failed");
+ return 1;
+ }
+
+ if (pthread_barrierattr_destroy (&ba) != 0)
+ {
+ puts ("barrierattr_destroy failed");
+ return 1;
+ }
+
+ struct flock fl =
+ {
+ .l_type = F_WRLCK,
+ .l_start = 0,
+ .l_whence = SEEK_SET,
+ .l_len = 10
+ };
+ if (TEMP_FAILURE_RETRY (fcntl (fd, F_SETLKW, &fl)) != 0)
+ {
+ puts ("first fcntl failed");
+ return 1;
+ }
+
+ pid_t pid = fork ();
+ if (pid == -1)
+ {
+ puts ("fork failed");
+ return 1;
+ }
+
+ if (pid == 0)
+ {
+ /* Make sure the child does not stay around indefinitely. */
+ alarm (10);
+
+ /* Try to get the lock. */
+ if (TEMP_FAILURE_RETRY (fcntl (fd, F_SETLK, &fl)) == 0)
+ {
+ puts ("child: second flock succeeded");
+ return 1;
+ }
+ }
+
+ pthread_barrier_wait (b);
+
+ if (pid != 0)
+ {
+ fl.l_type = F_UNLCK;
+ if (TEMP_FAILURE_RETRY (fcntl (fd, F_SETLKW, &fl)) != 0)
+ {
+ puts ("third fcntl failed");
+ return 1;
+ }
+ }
+
+ pthread_barrier_wait (b);
+
+ pthread_t th;
+ if (pid == 0)
+ {
+ if (pthread_mutex_lock (&lock) != 0)
+ {
+ puts ("1st locking of lock failed");
+ return 1;
+ }
+
+ if (pthread_mutex_lock (&lock2) != 0)
+ {
+ puts ("1st locking of lock2 failed");
+ return 1;
+ }
+
+ if (pthread_create (&th, NULL, tf, NULL) != 0)
+ {
+ puts ("pthread_create failed");
+ return 1;
+ }
+
+ if (pthread_mutex_lock (&lock) != 0)
+ {
+ puts ("2nd locking of lock failed");
+ return 1;
+ }
+
+ puts ("child locked file");
+ }
+
+ pthread_barrier_wait (b);
+
+ if (pid != 0)
+ {
+ fl.l_type = F_WRLCK;
+ if (TEMP_FAILURE_RETRY (fcntl (fd, F_SETLK, &fl)) == 0)
+ {
+ puts ("fifth fcntl succeeded");
+ return 1;
+ }
+
+ puts ("file locked by child");
+ }
+
+ pthread_barrier_wait (b);
+
+ if (pid == 0)
+ {
+ if (pthread_mutex_unlock (&lock2) != 0)
+ {
+ puts ("unlock of lock2 failed");
+ return 1;
+ }
+
+ if (pthread_join (th, NULL) != 0)
+ {
+ puts ("join failed");
+ return 1;
+ }
+
+ puts ("child's thread terminated");
+ }
+
+ pthread_barrier_wait (b);
+
+ if (pid != 0)
+ {
+ fl.l_type = F_WRLCK;
+ if (TEMP_FAILURE_RETRY (fcntl (fd, F_SETLK, &fl)) == 0)
+ {
+ puts ("fifth fcntl succeeded");
+ return 1;
+ }
+
+ puts ("file still locked");
+ }
+
+ pthread_barrier_wait (b);
+
+ if (pid == 0)
+ {
+ _exit (0);
+ }
+
+ int status;
+ if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
+ {
+ puts ("waitpid failed");
+ return 1;
+ }
+ puts ("child terminated");
+
+ if (TEMP_FAILURE_RETRY (fcntl (fd, F_SETLKW, &fl)) != 0)
+ {
+ puts ("sixth fcntl failed");
+ return 1;
+ }
+
+ return status;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"