Update.

2004-04-16  Jakub Jelinek  <jakub@redhat.com>

	* misc/syslog.c (vsyslog): Avoid freeing failbuf.

2004-04-15  Jakub Jelinek  <jakub@redhat.com>

	* rt/Makefile (tests): Add tst-timer4.
	* rt/tst-timer4.c: New test.

2004-04-15  Jakub Jelinek  <jakub@redhat.com>

	* rt/tst-mqueue5.c (rtmin_code): New variable.
	(rtmin_handler): Set it.
	(thr, do_child, do_test): Also check rtmin_code.

2004-04-14  Jakub Jelinek  <jakub@redhat.com>

	* rt/Makefile (tests): Add tst-mqueue7.
	(tst-mqueue7-ARGS): Set.
	* rt/tst-mqueue7.c: New test.

2004-04-13  Jakub Jelinek  <jakub@redhat.com>

	* rt/Makefile (tests): Add tst-mqueue5 and tst-mqueue6.
	* rt/tst-mqueue1.c (do_one_test): Bitwise or check_attrs () into
	result instead of replacing it.  Use TEMP_FAILURE_RETRY around
	waitpid, kill child if waitpid failed.
	(do_test): Bitwise or check_attrs () into result instead of replacing
	it.  Change temp mq name.
	* rt/tst-mqueue5.c: New test.
	* rt/tst-mqueue6.c: New test.
	* rt/tst-mqueue.h: Include stdio.h, unistd.h, sys/uio.h.
	(temp_mq_list, delete_temp_mqs): Remove.
	(temp_mq_fd): New variable.
	(do_cleanup, do_prepare): New functions.
	(add_temp_mq): Rewritten to use a temp file.
	(PREPARE): Define.
	(CLEANUP_HANDLER): Change to do_cleanup ().

	* rt/tst-timer3.c: Don't fail if _POSIX_THREADS is not available.

2004-04-13  Thorsten Kukuk  <kukuk@suse.de>

	* sysdeps/s390/ffs.c: Include limits.h

2004-04-13  Kaz Kojima  <kkojima@rr.iij4u.or.jp>

	* sysdeps/unix/sysv/linux/sh/sysdep.h (SUBSTITUTE_ARGS_1,
	SUBSTITUTE_ARGS_2, SUBSTITUTE_ARGS_3, SUBSTITUTE_ARGS_4,
	SUBSTITUTE_ARGS_5, SUBSTITUTE_ARGS_6, SUBSTITUTE_ARGS_7): Load
	argument values into temporary variables.

8 files changed, 2115 insertions, 33 deletions

diff --git a/rt/Makefile b/rt/Makefile
index 011bef357e..24801c4d18 100644
--- a/rt/Makefile
+++ b/rt/Makefile
@@ -44,7 +44,7 @@ librt-routines = $(aio-routines) \
 tests := tst-shm tst-clock tst-clock_nanosleep tst-timer tst-timer2 \
 	 tst-aio tst-aio64 tst-aio2 tst-aio3 tst-aio4 tst-aio5 tst-aio6 \
 	 tst-aio7 tst-mqueue1 tst-mqueue2 tst-mqueue3 tst-mqueue4 \
-	 tst-timer3
+	 tst-mqueue5 tst-mqueue6 tst-mqueue7 tst-timer3 tst-timer4
 
 extra-libs := librt
 extra-libs-others := $(extra-libs)
@@ -75,6 +75,8 @@ ifeq (yes,$(build-bounded))
 $(tests:%=$(objpfx)%-bp): $(objpfx)librt_b.a $(bounded-thread-library)
 endif
 
+tst-mqueue7-ARGS = -- $(built-program-cmd)
+
 ifeq (yes,$(build-static-nss))
 otherlibs += $(nssobjdir)/libnss_files.a $(resolvobjdir)/libnss_dns.a \
              $(resolvobjdir)/libresolv.a
diff --git a/rt/tst-mqueue.h b/rt/tst-mqueue.h
index 3659795a1b..8e73be51ce 100644
--- a/rt/tst-mqueue.h
+++ b/rt/tst-mqueue.h
@@ -21,42 +21,64 @@
 #include <mqueue.h>
 #include <search.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
+#include <sys/uio.h>
+#include <unistd.h>
 
-/* List of temporary files.  */
-struct temp_mq_list
-{
-  struct qelem q;
-  char name[1];
-} *temp_mq_list;
+static int temp_mq_fd;
 
 /* Add temporary files in list.  */
 static void
 __attribute__ ((unused))
 add_temp_mq (const char *name)
 {
-  size_t len = strlen (name);
-  struct temp_mq_list *newp
-    = (struct temp_mq_list *) calloc (sizeof (*newp) + len, 1);
-  if (newp != NULL)
+  struct iovec iov[2];
+  iov[0].iov_base = (char *) name;
+  iov[0].iov_len = strlen (name);
+  iov[1].iov_base = (char *) "\n";
+  iov[1].iov_len = 1;
+  if (writev (temp_mq_fd, iov, 2) != iov[0].iov_len + 1)
+    printf ("Could not record temp mq filename %s\n", name);
+}
+
+/* Delete all temporary message queues.  */
+static void
+do_cleanup (void)
+{
+  if (lseek (temp_mq_fd, 0, SEEK_SET) != 0)
+    return;
+
+  FILE *f = fdopen (temp_mq_fd, "r");
+  if (f == NULL)
+    return;
+
+  char *line = NULL;
+  size_t n = 0;
+  ssize_t rets;
+  while ((rets = getline (&line, &n, f)) > 0)
     {
-      memcpy (newp->name, name, len + 1);
-      if (temp_mq_list == NULL)
-        temp_mq_list = (struct temp_mq_list *) &newp->q;
-      else
-        insque (newp, temp_mq_list);
+      if (line[rets - 1] != '\n')
+        continue;
+
+      line[rets - 1] = '\0';
+      mq_unlink (line);
     }
+  fclose (f);
 }
 
-/* Delete all temporary files.  */
 static void
-delete_temp_mqs (void)
+do_prepare (void)
 {
-  while (temp_mq_list != NULL)
+  char name [] = "/tmp/tst-mqueueN.XXXXXX";
+  temp_mq_fd = mkstemp (name);
+  if (temp_mq_fd == -1)
     {
-      mq_unlink (temp_mq_list->name);
-      temp_mq_list = (struct temp_mq_list *) temp_mq_list->q.q_forw;
+      printf ("Could not create temporary file %s: %m\n", name);
+      exit (1);
     }
+  unlink (name);
 }
 
-#define CLEANUP_HANDLER	delete_temp_mqs ()
+#define PREPARE(argc, argv) do_prepare ()
+#define CLEANUP_HANDLER	do_cleanup ()
diff --git a/rt/tst-mqueue1.c b/rt/tst-mqueue1.c
index a6f8fb50c7..db4065ea93 100644
--- a/rt/tst-mqueue1.c
+++ b/rt/tst-mqueue1.c
@@ -83,7 +83,7 @@ do_one_test (mqd_t q, const char *name, int nonblock)
       result = 1;
     }
   else
-    result = check_attrs (&attr, nonblock, 0);
+    result |= check_attrs (&attr, nonblock, 0);
 
   if (mq_receive (q, &v[0], 1, NULL) != -1)
     {
@@ -156,7 +156,7 @@ do_one_test (mqd_t q, const char *name, int nonblock)
       result = 1;
     }
   else
-    result = check_attrs (&attr, nonblock, 10);
+    result |= check_attrs (&attr, nonblock, 10);
 
   pid_t pid = fork ();
   if (pid == -1)
@@ -188,7 +188,7 @@ do_one_test (mqd_t q, const char *name, int nonblock)
 	  result = 1;
 	}
       else
-	result = check_attrs (&attr, nonblock, 10);
+	result |= check_attrs (&attr, nonblock, 10);
 
       unsigned char vr[11] = { };
       unsigned int prio;
@@ -272,7 +272,7 @@ do_one_test (mqd_t q, const char *name, int nonblock)
 	  result = 1;
 	}
       else
-	result = check_attrs (&attr, nonblock, 0);
+	result |= check_attrs (&attr, nonblock, 0);
 
       if (mq_close (q) != 0)
 	{
@@ -284,9 +284,10 @@ do_one_test (mqd_t q, const char *name, int nonblock)
     }
 
   int status;
-  if (waitpid (pid, &status, 0) != pid)
+  if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
     {
       printf ("waitpid failed: %m\n");
+      kill (pid, SIGKILL);
       result = 1;
     }
   else if (!WIFEXITED (status) || WEXITSTATUS (status))
@@ -302,7 +303,7 @@ do_one_test (mqd_t q, const char *name, int nonblock)
       result = 1;
     }
   else
-    result = check_attrs (&attr, nonblock, 0);
+    result |= check_attrs (&attr, nonblock, 0);
 
   return result;
 }
@@ -313,8 +314,8 @@ do_test (void)
 {
   int result = 0;
 
-  char name[sizeof "/tst-mqueue-" + sizeof (pid_t) * 3];
-  snprintf (name, sizeof (name), "/tst-mqueue-%u", getpid ());
+  char name[sizeof "/tst-mqueue1-" + sizeof (pid_t) * 3];
+  snprintf (name, sizeof (name), "/tst-mqueue1-%u", getpid ());
 
   struct mq_attr attr = { .mq_maxmsg = 10, .mq_msgsize = 1 };
   mqd_t q = mq_open (name, O_CREAT | O_EXCL | O_WRONLY, 0600, &attr);
@@ -327,7 +328,7 @@ do_test (void)
   else
     add_temp_mq (name);
 
-  result = do_one_test (q, name, 0);
+  result |= do_one_test (q, name, 0);
 
   mqd_t q2 = mq_open (name, O_WRONLY | O_NONBLOCK);
   if (q2 == (mqd_t) -1)
diff --git a/rt/tst-mqueue5.c b/rt/tst-mqueue5.c
new file mode 100644
index 0000000000..cdbad287a3
--- /dev/null
+++ b/rt/tst-mqueue5.c
@@ -0,0 +1,1014 @@
+/* Test mq_notify.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
+
+   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 <fcntl.h>
+#include <mqueue.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+#include "tst-mqueue.h"
+
+#define TIMEOUT 3
+
+#if _POSIX_THREADS
+# include <pthread.h>
+
+volatile int rtmin_cnt;
+volatile pid_t rtmin_pid;
+volatile uid_t rtmin_uid;
+volatile int rtmin_code;
+volatile union sigval rtmin_sigval;
+
+static void
+rtmin_handler (int sig, siginfo_t *info, void *ctx)
+{
+  if (sig != SIGRTMIN)
+    abort ();
+  ++rtmin_cnt;
+  rtmin_pid = info->si_pid;
+  rtmin_uid = info->si_uid;
+  rtmin_code = info->si_code;
+  rtmin_sigval = info->si_value;
+}
+
+#define mqsend(q) (mqsend) (q, __LINE__)
+static inline int
+(mqsend) (mqd_t q, int line)
+{
+  char c;
+  if (mq_send (q, &c, 1, 1) != 0)
+    {
+      printf ("mq_send on line %d failed with: %m\n", line);
+      return 1;
+    }
+  return 0;
+}
+
+#define mqrecv(q) (mqrecv) (q, __LINE__)
+static inline int
+(mqrecv) (mqd_t q, int line)
+{
+  char c;
+  ssize_t rets = TEMP_FAILURE_RETRY (mq_receive (q, &c, 1, NULL));
+  if (rets != 1)
+    {
+      if (rets == -1)
+	printf ("mq_receive on line %d failed with: %m\n", line);
+      else
+	printf ("mq_receive on line %d returned %zd != 1\n",
+		line, rets);
+      return 1;
+    }
+  return 0;
+}
+
+struct thr_data
+{
+  const char *name;
+  pthread_barrier_t *b3;
+  mqd_t q;
+};
+
+static void *
+thr (void *arg)
+{
+  pthread_barrier_t *b3 = ((struct thr_data *)arg)->b3;
+  mqd_t q = ((struct thr_data *)arg)->q;
+  const char *name = ((struct thr_data *)arg)->name;
+  int result = 0;
+
+  result |= mqrecv (q);
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Child verifies SIGRTMIN has not been sent.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Parent calls mqsend (q), which should trigger notification.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  if (rtmin_cnt != 2)
+    {
+      puts ("SIGRTMIN signal in child did not arrive");
+      result = 1;
+    }
+  else if (rtmin_pid != getppid ()
+	   || rtmin_uid != getuid ()
+	   || rtmin_code != SI_MESGQ
+	   || rtmin_sigval.sival_int != 0xdeadbeef)
+    {
+      printf ("unexpected siginfo_t fields: pid %u (%u), uid %u (%u), code %d (%d), si_int %d (%d)\n",
+	      rtmin_pid, getppid (), rtmin_uid, getuid (),
+	      rtmin_code, SI_MESGQ, rtmin_sigval.sival_int, 0xdeadbeef);
+      result = 1;
+    }
+
+  struct sigevent ev;
+  memset (&ev, 0x82, sizeof (ev));
+  ev.sigev_notify = SIGEV_NONE;
+  if (mq_notify (q, &ev) != 0)
+    {
+      printf ("mq_notify in thread (q, { SIGEV_NONE }) failed with: %m\n");
+      result = 1;
+    }
+
+  if (mq_notify (q, NULL) != 0)
+    {
+      printf ("mq_notify in thread (q, NULL) failed with: %m\n");
+      result = 1;
+    }
+
+  result |= mqrecv (q);
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Child calls mq_notify (q, { SIGEV_SIGNAL }).  */
+
+  (void) pthread_barrier_wait (b3);
+
+  if (mq_notify (q, NULL) != 0)
+    {
+      printf ("second mq_notify in thread (q, NULL) failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Parent calls mqsend (q), which should not trigger notification.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Child verifies SIGRTMIN has not been received.  */
+  /* Child calls mq_notify (q, { SIGEV_SIGNAL }).  */
+
+  (void) pthread_barrier_wait (b3);
+
+  mqd_t q4 = mq_open (name, O_RDONLY);
+  if (q4 == (mqd_t) -1)
+    {
+      printf ("mq_open in thread failed with: %m\n");
+      result = 1;
+    }
+
+  if (mq_notify (q4, NULL) != 0)
+    {
+      printf ("mq_notify in thread (q4, NULL) failed with: %m\n");
+      result = 1;
+    }
+
+  if (mq_close (q4) != 0)
+    {
+      printf ("mq_close in thread failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Parent calls mqsend (q), which should not trigger notification.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Child verifies SIGRTMIN has not been received.  */
+  /* Child calls mq_notify (q, { SIGEV_SIGNAL }).  */
+
+  (void) pthread_barrier_wait (b3);
+
+  mqd_t q5 = mq_open (name, O_WRONLY);
+  if (q5 == (mqd_t) -1)
+    {
+      printf ("mq_open O_WRONLY in thread failed with: %m\n");
+      result = 1;
+    }
+
+  if (mq_notify (q5, NULL) != 0)
+    {
+      printf ("mq_notify in thread (q5, NULL) failed with: %m\n");
+      result = 1;
+    }
+
+  if (mq_close (q5) != 0)
+    {
+      printf ("mq_close in thread failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Parent calls mqsend (q), which should not trigger notification.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Child verifies SIGRTMIN has not been received.  */
+
+  return (void *) (long) result;
+}
+
+static void
+do_child (const char *name, pthread_barrier_t *b2, pthread_barrier_t *b3,
+	  mqd_t q)
+{
+  int result = 0;
+
+  struct sigevent ev;
+  memset (&ev, 0x55, sizeof (ev));
+  ev.sigev_notify = SIGEV_SIGNAL;
+  ev.sigev_signo = SIGRTMIN;
+  ev.sigev_value.sival_ptr = &ev;
+  if (mq_notify (q, &ev) == 0)
+    {
+      puts ("first mq_notify in child (q, { SIGEV_SIGNAL }) unexpectedly succeeded");
+      result = 1;
+    }
+  else if (errno != EBUSY)
+    {
+      printf ("first mq_notify in child (q, { SIGEV_SIGNAL }) failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b2);
+
+  /* Parent calls mqsend (q), which makes notification available.  */
+
+  (void) pthread_barrier_wait (b2);
+
+  rtmin_cnt = 0;
+
+  if (mq_notify (q, &ev) != 0)
+    {
+      printf ("second mq_notify in child (q, { SIGEV_SIGNAL }) failed with: %m\n");
+      result = 1;
+    }
+
+  if (rtmin_cnt != 0)
+    {
+      puts ("SIGRTMIN signal in child caught too early");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b2);
+
+  /* Parent unsuccessfully attempts to mq_notify.  */
+  /* Parent calls mqsend (q), which makes notification available
+     and triggers a signal in the child.  */
+  /* Parent successfully calls mq_notify SIGEV_SIGNAL.  */
+
+  (void) pthread_barrier_wait (b2);
+
+  if (rtmin_cnt != 1)
+    {
+      puts ("SIGRTMIN signal in child did not arrive");
+      result = 1;
+    }
+  else if (rtmin_pid != getppid ()
+	   || rtmin_uid != getuid ()
+	   || rtmin_code != SI_MESGQ
+	   || rtmin_sigval.sival_ptr != &ev)
+    {
+      printf ("unexpected siginfo_t fields: pid %u (%u), uid %u (%u), code %d (%d), si_ptr %p (%p)\n",
+	      rtmin_pid, getppid (), rtmin_uid, getuid (),
+	      rtmin_code, SI_MESGQ, rtmin_sigval.sival_ptr, &ev);
+      result = 1;
+    }
+
+  result |= mqsend (q);
+
+  (void) pthread_barrier_wait (b2);
+
+  /* Parent verifies caught SIGRTMIN.  */
+
+  mqd_t q2 = mq_open (name, O_RDWR);
+  if (q2 == (mqd_t) -1)
+    {
+      printf ("mq_open in child failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b2);
+
+  /* Parent mq_open's another mqd_t for the same queue (q3).  */
+
+  memset (&ev, 0x11, sizeof (ev));
+  ev.sigev_notify = SIGEV_SIGNAL;
+  ev.sigev_signo = SIGRTMIN;
+  ev.sigev_value.sival_ptr = &ev;
+  if (mq_notify (q2, &ev) != 0)
+    {
+      printf ("mq_notify in child (q2, { SIGEV_SIGNAL }) failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b2);
+
+  /* Parent unsuccessfully attempts to mq_notify { SIGEV_NONE } on q.  */
+
+  (void) pthread_barrier_wait (b2);
+
+  if (mq_close (q2) != 0)
+    {
+      printf ("mq_close failed: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b2);
+
+  /* Parent successfully calls mq_notify { SIGEV_NONE } on q3.  */
+
+  (void) pthread_barrier_wait (b2);
+
+  memset (&ev, 0xbb, sizeof (ev));
+  ev.sigev_notify = SIGEV_SIGNAL;
+  ev.sigev_signo = SIGRTMIN;
+  ev.sigev_value.sival_ptr = &b2;
+  if (mq_notify (q, &ev) == 0)
+    {
+      puts ("third mq_notify in child (q, { SIGEV_SIGNAL }) unexpectedly succeeded");
+      result = 1;
+    }
+  else if (errno != EBUSY)
+    {
+      printf ("third mq_notify in child (q, { SIGEV_SIGNAL }) failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b2);
+
+  /* Parent calls mq_close on q3, which makes the queue available again for
+     notification.  */
+
+  (void) pthread_barrier_wait (b2);
+
+  memset (&ev, 0x13, sizeof (ev));
+  ev.sigev_notify = SIGEV_NONE;
+  if (mq_notify (q, &ev) != 0)
+    {
+      printf ("mq_notify in child (q, { SIGEV_NONE }) failed with: %m\n");
+      result = 1;
+    }
+
+  if (mq_notify (q, NULL) != 0)
+    {
+      printf ("mq_notify in child (q, NULL) failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b2);
+
+  struct thr_data thr_data = { .name = name, .b3 = b3, .q = q };
+  pthread_t th;
+  int ret = pthread_create (&th, NULL, thr, &thr_data);
+  if (ret)
+    {
+      errno = ret;
+      printf ("pthread_created failed with: %m\n");
+      result = 1;
+    }
+
+  /* Wait till thr calls mq_receive on the empty queue q and blocks on it.  */
+  sleep (1);
+
+  memset (&ev, 0x5f, sizeof (ev));
+  ev.sigev_notify = SIGEV_SIGNAL;
+  ev.sigev_signo = SIGRTMIN;
+  ev.sigev_value.sival_int = 0xdeadbeef;
+  if (mq_notify (q, &ev) != 0)
+    {
+      printf ("fourth mq_notify in child (q, { SIGEV_SIGNAL }) failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b2);
+
+  /* Parent calls mqsend (q), which should wake up mqrecv (q)
+     in the thread but no notification should be sent.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  if (rtmin_cnt != 1)
+    {
+      puts ("SIGRTMIN signal caught while thr was blocked on mq_receive");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Parent calls mqsend (q), which should trigger notification.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Thread verifies SIGRTMIN has been received.  */
+  /* Thread calls mq_notify (q, { SIGEV_NONE }) to verify notification is now
+     available for registration.  */
+  /* Thread calls mq_notify (q, NULL).  */
+
+  (void) pthread_barrier_wait (b3);
+
+  memset (&ev, 0x6a, sizeof (ev));
+  ev.sigev_notify = SIGEV_SIGNAL;
+  ev.sigev_signo = SIGRTMIN;
+  ev.sigev_value.sival_ptr = do_child;
+  if (mq_notify (q, &ev) != 0)
+    {
+      printf ("fifth mq_notify in child (q, { SIGEV_SIGNAL }) failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Thread calls mq_notify (q, NULL), which should unregister the above
+     notification.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Parent calls mqsend (q), which should not trigger notification.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  if (rtmin_cnt != 2)
+    {
+      puts ("SIGRTMIN signal caught while notification has been disabled");
+      result = 1;
+    }
+
+  memset (&ev, 0x7b, sizeof (ev));
+  ev.sigev_notify = SIGEV_SIGNAL;
+  ev.sigev_signo = SIGRTMIN;
+  ev.sigev_value.sival_ptr = thr;
+  if (mq_notify (q, &ev) != 0)
+    {
+      printf ("sixth mq_notify in child (q, { SIGEV_SIGNAL }) failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Thread opens a new O_RDONLY mqd_t (q4).  */
+  /* Thread calls mq_notify (q4, NULL), which should unregister the above
+     notification.  */
+  /* Thread calls mq_close (q4).  */ 
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Parent calls mqsend (q), which should not trigger notification.  */
+
+  (void) pthread_barrier_wait (b3);
+
+  if (rtmin_cnt != 2)
+    {
+      puts ("SIGRTMIN signal caught while notification has been disabled");
+      result = 1;
+    }
+
+  memset (&ev, 0xe1, sizeof (ev));
+  ev.sigev_notify = SIGEV_SIGNAL;
+  ev.sigev_signo = SIGRTMIN;
+  ev.sigev_value.sival_int = 127;
+  if (mq_notify (q, &ev) != 0)
+    {
+      printf ("seventh mq_notify in child (q, { SIGEV_SIGNAL }) failed with: %m\n");
+      result = 1;
+    }
+
+  (void) pthread_barrier_wait (b3);
+
+  /* Thread opens a new O_WRONLY mqd_t (q5).  */
+  /* Thread calls mq_notify (q5, NULL), which should unregister the above