From ef467338e4a290b0f8978a0701b404e17c5bb048 Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Wed, 19 Jun 2002 22:17:33 +0000
Subject: 2002-06-19  Jeff Johnston  <jjohnstn@redhat.com>

        * libc/sys/linux/Makefile.am: Add support for message queue routines,
        ipc routines, and ftok.
        * libc/sys/linux/Makefile.in: Regenerated.
        * libc/sys/linux/ftok.c: New file.
        * libc/sys/linux/ipc.c: Ditto.
        * libc/sys/linux/mq_close.c: Ditto.
        * libc/sys/linux/mq_getattr.c: Ditto.
        * libc/sys/linux/mq_notify.c: Ditto.
        * libc/sys/linux/mq_open.c: Ditto.
        * libc/sys/linux/mq_receive.c: Ditto.
        * libc/sys/linux/mq_send.c: Ditto.
        * libc/sys/linux/mq_setattr.c: Ditto.
        * libc/sys/linux/mq_unlink.c: Ditto.
        * libc/sys/linux/mqlocal.h: Ditto.
        * libc/sys/linux/include/mqueue.h: Ditto.
        * libc/sys/linux/sys/types.h: Define __gid_t_defined and
        __uid_t_defined.
---
 newlib/libc/sys/linux/mq_getattr.c | 52 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 newlib/libc/sys/linux/mq_getattr.c

(limited to 'newlib/libc/sys/linux/mq_getattr.c')

diff --git a/newlib/libc/sys/linux/mq_getattr.c b/newlib/libc/sys/linux/mq_getattr.c
new file mode 100644
index 000000000..b82906013
--- /dev/null
+++ b/newlib/libc/sys/linux/mq_getattr.c
@@ -0,0 +1,52 @@
+/* Copyright 2002, Red Hat Inc. */
+
+#include <mqueue.h>
+#include <errno.h>
+#include <sys/sem.h>
+#include <string.h>
+#define _LIBC
+#include <sys/lock.h>
+#undef _LIBC
+
+#include "mqlocal.h"
+
+int
+mq_getattr (mqd_t msgid, struct mq_attr *mqstat)
+{
+  struct libc_mq *info;
+  struct sembuf sb0 = {0, -1, 0};
+  int num_msgs;
+  int rc = 0;
+
+  info = __find_mq (msgid);
+
+  if (info == NULL)
+    {
+      errno = EBADF;
+      return -1;
+    }
+
+  /* temporarily lock message queue */
+  semop (info->semid, &sb0, 1);
+
+  num_msgs = semctl (info->semid, 3, GETVAL);
+  if (num_msgs >= 0)
+    {
+      memcpy (mqstat, info->attr, sizeof(struct mq_attr));
+      mqstat->mq_curmsgs = num_msgs;
+    }
+  else
+    rc = -1;
+
+  /* release message queue */
+  sb0.sem_op = 1;
+  semop (info->semid, &sb0, 1);
+
+  return rc;
+}
+      
+
+
+
+
+
-- 
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