MQ_UNLINK(3C) Standard C Library Functions MQ_UNLINK(3C)
NAME
mq_unlink - remove a message queue
SYNOPSIS
#include <mqueue.h>
int mq_unlink(
const char *name);
DESCRIPTION
The
mq_unlink() function removes the message queue named by the
pathname
name. After a successful call to
mq_unlink() with
name, a
call to
mq_open(3C) with
name fails if the flag
O_CREAT is not set in
flags. If one or more processes have the message queue open when
mq_unlink() is called, destruction of the message queue is postponed
until all references to the message queue have been closed. Calls to
mq_open(3C) to re-create the message queue may fail until the message
queue is actually removed. However, the
mq_unlink() call need not
block until all references have been closed; it may return
immediately.
RETURN VALUES
Upon successful completion,
mq_unlink() returns
0; otherwise, the
named message queue is not changed by this function call, the
function returns
-1 and sets
errno to indicate the error.
ERRORS
The
mq_unlink() function will fail if:
EACCES Permission is denied to unlink the named message
queue.
ENAMETOOLONG The length of the
name string exceeds
PATH_MAX, or
a pathname component is longer than
NAME_MAX while
_POSIX_NO_TRUNC is in effect.
ENOENT The named message queue,
name, does not exist.
ENOSYS mq_unlink() is not supported by the system.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Committed |
+--------------------+-------------------+
|MT-Level | MT-Safe |
+--------------------+-------------------+
|Standard | See
standards(7). |
+--------------------+-------------------+
SEE ALSO
mq_close(3C),
mq_open(3C),
mqueue.h(3HEAD),
attributes(7),
standards(7)NOTES
Solaris 2.6 was the first release to support the Asynchronous Input
and Output option. Prior to this release, this function always
returned
-1 and set
errno to
ENOSYS.
February 5, 2008 MQ_UNLINK(3C)
