mq_unlink(3RT) Realtime Library Functions mq_unlink(3RT)NAMEmq_unlink - remove a message queue
SYNOPSIS
cc [ flag... ] file... -lrt [ library... ]
#include <mqueue.h>
int mq_unlink(const char *name);
DESCRIPTION
The mq_unlink() function removes the message queue named by the path‐
name name. After a successful call to mq_unlink() with name, a call to
mq_open(3RT) 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 ref‐
erences to the message queue have been closed. Calls to mq_open(3RT) to
re-create the message queue may fail until the message queue is actu‐
ally 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 mes‐
sage 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(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Standard │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmqueue.h(3HEAD), mq_close(3RT), mq_open(3RT), attributes(5), stan‐
dards(5)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.
SunOS 5.10 28 Jun 2002 mq_unlink(3RT)
