структура доступа к межпроцессному взаимодействию XSI (XSI interprocess communication access structure)
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)
sys/ipc.h — XSI interprocess communication access structure
Синопсис (Synopsis)
#include <sys/ipc.h>
Описание (Description)
The <sys/ipc.h> header is used by three mechanisms for XSI
interprocess communication (IPC): messages, semaphores, and
shared memory. All use a common structure type, ipc_perm, to pass
information used in determining permission to perform an IPC
operation.
The <sys/ipc.h> header shall define the ipc_perm structure, which
shall include the following members:
uid_t uid Owner's user ID.
gid_t gid Owner's group ID.
uid_t cuid Creator's user ID.
gid_t cgid Creator's group ID.
mode_t mode Read/write permission.
The <sys/ipc.h> header shall define the uid_t, gid_t, mode_t, and
key_t types as described in <sys/types.h>.
The <sys/ipc.h> header shall define the following symbolic
constants.
Mode bits:
IPC_CREAT Create entry if key does not exist.
IPC_EXCL Fail if key exists.
IPC_NOWAIT Error if request must wait.
Keys:
IPC_PRIVATE Private key.
Control commands:
IPC_RMID Remove identifier.
IPC_SET Set options.
IPC_STAT Get options.
The following shall be declared as a function and may also be
defined as a macro. A function prototype shall be provided.
key_t ftok(const char *, int);
The following sections are informative.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
sys_types.h(0p)
The System Interfaces volume of POSIX.1‐2017, ftok(3p)
