Add SYSV message queue test

This patch adds a simple SYSV message queue test to check for correct
argument passing on kernel.  The idea is neither to be an extensive
testing nor to check for any specific Linux test.

	* sysvipc/Makefile (tests): Add test-sysvmsg.
	* sysvipc/test-sysvmsg.c: New file.
	* test-skeleton.c (FAIL_UNSUPPORTED): New define.

2 files changed, 130 insertions, 0 deletions

diff --git a/sysvipc/Makefile b/sysvipc/Makefile
index 5f3479e..73bb9cf 100644
--- a/sysvipc/Makefile
+++ b/sysvipc/Makefile
@@ -30,6 +30,8 @@ routines := ftok \
 	    semop semget semctl semtimedop \
 	    shmat shmdt shmget shmctl
 
+tests    := test-sysvmsg
+
 include ../Rules
 
 CFLAGS-msgrcv.c = -fexceptions -fasynchronous-unwind-tables
diff --git a/sysvipc/test-sysvmsg.c b/sysvipc/test-sysvmsg.c
new file mode 100644
index 0000000..cd2c488
--- /dev/null
+++ b/sysvipc/test-sysvmsg.c
@@ -0,0 +1,128 @@
+/* Basic tests for SYSV message queue functions.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/msg.h>
+
+#include <support/support.h>
+#include <support/check.h>
+#include <support/temp_file.h>
+
+#define TEXTSIZE 32
+struct msgbuf_t
+{
+#ifdef _GNU_SOURCE
+  __syscall_slong_t type;
+#else
+  long type;
+#endif
+  char buf[TEXTSIZE];
+};
+
+#define MSGTYPE 0x01020304
+#define MSGDATA "0123456789"
+
+/* These are for the temporary file we generate.  */
+static char *name;
+static int msqid;
+
+static void
+remove_msq (void)
+{
+  /* Enforce message queue removal in case of early test failure.
+     Ignore error since the msgq may already have being removed.  */
+  msgctl (msqid, IPC_RMID, NULL);
+}
+
+static void
+do_prepare (int argc, char *argv[])
+{
+  int fd = create_temp_file ("tst-sysvmsg.", &name);
+  if (fd == -1)
+    FAIL_EXIT1 ("cannot create temporary file (errno=%d)", errno);
+}
+
+#define PREPARE do_prepare
+
+/* It is not an extensive test, but rather a functional one aimed to check
+   correct parameter passing on kernel.  */
+
+#define MSGQ_MODE 0644
+
+static int
+do_test (void)
+{
+  atexit (remove_msq);
+
+  key_t key = ftok (name, 'G');
+  if (key == -1)
+    FAIL_EXIT1 ("ftok failed");
+
+  msqid = msgget (key, MSGQ_MODE | IPC_CREAT);
+  if (msqid == -1)
+    {
+      if (errno == ENOSYS)
+	FAIL_UNSUPPORTED ("msgget not supported");
+      FAIL_EXIT1 ("msgget failed (errno=%d)", errno);
+    }
+
+  /* Get message queue kernel information and do some sanity checks.  */
+  struct msqid_ds msginfo;
+  if (msgctl (msqid, IPC_STAT, &msginfo) == -1)
+    FAIL_EXIT1 ("msgctl with IPC_STAT failed (errno=%d)", errno);
+
+  if (msginfo.msg_perm.__key != key)
+    FAIL_EXIT1 ("msgid_ds::msg_perm::key (%d) != %d",
+		(int) msginfo.msg_perm.__key, (int) key);
+  if (msginfo.msg_perm.mode != MSGQ_MODE)
+    FAIL_EXIT1 ("msgid_ds::msg_perm::mode (%o) != %o",
+		msginfo.msg_perm.mode, MSGQ_MODE);
+  if (msginfo.msg_qnum != 0)
+    FAIL_EXIT1 ("msgid_ds::msg_qnum (%lu) != 0",
+		(long unsigned) msginfo.msg_qnum);
+
+  /* Check if last argument (IPC_NOWAIT) is correctly handled.  */
+  struct msgbuf_t msg2rcv = { 0 };
+  if (msgrcv (msqid, &msg2rcv, sizeof (msg2rcv.buf), MSGTYPE,
+	      IPC_NOWAIT) == -1
+      && errno != ENOMSG)
+    FAIL_EXIT1 ("msgrcv failed (errno=%d)", errno);
+
+  struct msgbuf_t msg2snd = { MSGTYPE, MSGDATA };
+  if (msgsnd (msqid, &msg2snd, sizeof (msg2snd.buf), 0) == -1)
+    FAIL_EXIT1 ("msgsnd failed (errno=%d)", errno);
+
+  if (msgrcv (msqid, &msg2rcv, sizeof (msg2rcv.buf), MSGTYPE, 0) == -1)
+    FAIL_EXIT1 ("msgrcv failed (errno=%d)", errno);
+
+  int ret = 0;
+  if (strncmp (msg2snd.buf, msg2rcv.buf, TEXTSIZE) != 0)
+    ret = 1;
+
+  if (msgctl (msqid, IPC_RMID, NULL) == -1)
+    FAIL_EXIT1 ("msgctl failed");
+
+  return ret;
+}
+
+#include <support/test-driver.c>