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/* sys/ipc.h
Copyright 2001 Red Hat Inc.
Written by Robert Collins <rbtcollins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _SYS_IPC_H
#define _SYS_IPC_H
#ifdef __cplusplus
extern "C"
{
#endif
/*
* <sys/types.h> must be included before <sys/ipc.h>. We aren't meant
* to automatically include it however.
*/
struct ipc_perm {
uid_t uid;
gid_t gid;
uid_t cuid;
gid_t cgid;
mode_t mode;
};
/*
* The mode flags used with the _get functions use the low order 9
* bits for a mode request.
*/
#define IPC_CREAT 0x0200
#define IPC_EXCL 0x0400
#define IPC_NOWAIT 0x0800
/* This is a value that will _never_ be a valid key from ftok(3). */
#define IPC_PRIVATE ((key_t) -2)
/*
* Values for the cmd argument to shmctl(2).
* Commands 1000-1fff are reserved for IPC_xxx.
*/
#define IPC_RMID 0x1000
#define IPC_SET 0x1001
#define IPC_STAT 0x1002
#define IPC_INFO 0x1003 /* For ipcs(8). */
key_t ftok(const char *, int);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_IPC_H */
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