1 files changed, 52 insertions, 0 deletions
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;
+}
+      
+
+
+
+
+