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).

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.