NAME

mq_unlink − remove a message queue

SYNOPSIS

cc [ flag ... ] file ... −lposix4 [ library ... ]

#include <mqueue.h>

int mq_unlink(const char ∗name);

MT-LEVEL

MT-Safe

DESCRIPTION

mq_unlink() removes the message queue named by name. After a successful call to mq_unlink() with name, a call to mq_open(3R) with the same name will fail 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(3R) to re-create the message queue may fail until the message queue is actually removed.  However, mq_unlink() does not block (wait) until all references have been closed; it returns immediately. 

RETURN VALUES

Upon successful completion, mq_unlink() returns a value of 0; otherwise, the named message queue is not changed by this function call, the function returns a value of -1 and sets errno to indicate the error condition. 

ERRORS

EACCESS 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 this implementation. 

SEE ALSO

mq_close(3R), mq_open(3R)

BUGS

In Solaris 2.4, these functions always return −1 and set errno to ENOSYS, because this release does not support the Message Passing option.  It is our intention to provide support for these interfaces in future releases. 

SunOS 5.4  —  Last change: 19 Aug 1993