MQ_UNLINK(3C)MQ_UNLINK(3C)NAMEmq_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 path‐
name 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 refer‐
ences 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 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 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(5) for descriptions of the following attributes:
┌────────────────────┬───────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼───────────────────┤
│Interface Stability │ Committed │
├────────────────────┼───────────────────┤
│MT-Level │ MT-Safe │
├────────────────────┼───────────────────┤
│Standard │ See standards(5). │
└────────────────────┴───────────────────┘
SEE ALSOmqueue.h(3HEAD), mq_close(3C), mq_open(3C), attributes(5), standards(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.
Feb 5, 2008 MQ_UNLINK(3C)
