winsup/cygwin/include/cygwin/ipc.h

   1 /* sys/ipc.h
   2
   3    Copyright 2001, 2002 Red Hat Inc.
   4    Written by Robert Collins <rbtcollins@hotmail.com>
   5
   6 This file is part of Cygwin.
   7
   8 This software is a copyrighted work licensed under the terms of the
   9 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
  10 details. */
  11
  12 #ifndef _SYS_IPC_H
  13 #define _SYS_IPC_H
  14
  15 #ifdef __cplusplus
  16 extern "C"
  17 {
  18 #endif
  19
  20 struct ipc_perm
  21 {
  22   uid_t  uid;                   /* Owner's user ID. */
  23   gid_t  gid;                   /* Owner's group ID. */
  24   uid_t  cuid;                  /* Creator's user ID. */
  25   gid_t  cgid;                  /* Creator's group ID. */
  26   mode_t mode;                  /* Read/write permission. */
  27   key_t  key;
  28 };
  29
  30 /* Mode bits:
  31  */
  32 #define IPC_CREAT  0x0200       /* Create entry if key does not exist. */
  33 #define IPC_EXCL   0x0400       /* Fail if key exists. */
  34 #define IPC_NOWAIT 0x0800       /* Error if request must wait. */
  35
  36 /* Keys:
  37  */
  38 #define IPC_PRIVATE ((key_t) 0) /* Private key. */
  39
  40 /* Control commands:
  41  */
  42 #define IPC_RMID 0x1000         /* Remove identifier. */
  43 #define IPC_SET  0x1001         /* Set options. */
  44 #define IPC_STAT 0x1002         /* Get options. */
  45 #define IPC_INFO 0x1003         /* For ipcs(8). */
  46
  47 key_t ftok (const char *path, int id);
  48
  49 #ifdef __cplusplus
  50 }
  51 #endif
  52
  53 #endif /* _SYS_IPC_H */