MQ_UNLINK(3C) Standard C Library Functions MQ_UNLINK(3C)
mq_unlink - remove a message queue
#include <mqueue.h>
int mq_unlink(const char *name);
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.
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.
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.
See attributes(7) for descriptions of the following attributes:
+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Committed |
+--------------------+-------------------+
|MT-Level | MT-Safe |
+--------------------+-------------------+
|Standard | See standards(7). |
+--------------------+-------------------+
mq_close(3C), mq_open(3C), mqueue.h(3HEAD), attributes(7),
standards(7)
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)
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)