PROLOG | NAME | SYNOPSIS | DESCRIPTION | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

sys_ipc.h(0P)             POSIX Programmer's Manual            sys_ipc.h(0P)

PROLOG         top

       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.

NAME         top

       sys/ipc.h — XSI interprocess communication access structure

SYNOPSIS         top

       #include <sys/ipc.h>

DESCRIPTION         top

       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.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       sys_types.h(0p)
       The System Interfaces volume of POSIX.1‐2008, ftok(3p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) In the event of any discrepancy between this version and
       the original IEEE and The Open Group Standard, the original IEEE and
       The Open Group Standard is the referee document. The original
       Standard can be obtained online at http://www.unix.org/online.html .
       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                 2013                       sys_ipc.h(0P)

Pages that refer to this page: sys_msg.h(0p)sys_sem.h(0p)sys_shm.h(0p)ftok(3p)semop(3p)