удалить очередь сообщений (РЕАЛЬНОЕ ВРЕМЯ) (remove a message queue (REALTIME))
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
mq_unlink — remove a message queue (REALTIME)
Синопсис (Synopsis)
#include <mqueue.h>
int mq_unlink(const char *name);
Описание (Description)
The mq_unlink() function shall remove the message queue named by
the string name. If one or more processes have the message queue
open when mq_unlink() is called, destruction of the message queue
shall be postponed until all references to the message queue have
been closed. However, the mq_unlink() call need not block until
all references have been closed; it may return immediately.
After a successful call to mq_unlink(), reuse of the name shall
subsequently cause mq_open() to behave as if no message queue of
this name exists (that is, mq_open() will fail if O_CREAT is not
set, or will create a new message queue if O_CREAT is set).
Возвращаемое значение (Return value)
Upon successful completion, the function shall return a value of
zero. Otherwise, the named message queue shall be unchanged by
this function call, and the function shall return a value of -1
and set errno to indicate the error.
Ошибки (Error)
The mq_unlink() function shall fail if:
EACCES Permission is denied to unlink the named message queue.
EINTR The call to mq_unlink() blocked waiting for all references
to the named message queue to be closed and a signal
interrupted the call.
ENOENT The named message queue does not exist.
The mq_unlink() function may fail if:
ENAMETOOLONG
The length of the name argument exceeds {_POSIX_PATH_MAX}
on systems that do not support the XSI option or exceeds
{_XOPEN_PATH_MAX} on XSI systems, or has a pathname
component that is longer than {_POSIX_NAME_MAX} on systems
that do not support the XSI option or longer than
{_XOPEN_NAME_MAX} on XSI systems. A call to mq_unlink()
with a name argument that contains the same message queue
name as was previously used in a successful mq_open() call
shall not give an [ENAMETOOLONG] error.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
A future version might require the mq_open() and mq_unlink()
functions to have semantics similar to normal file system
operations.
Смотри также (See also)
mq_close(3p), mq_open(3p), msgctl(3p), msgget(3p), msgrcv(3p),
msgsnd(3p)
The Base Definitions volume of POSIX.1‐2017, mqueue.h(0p)
