include/uapi/linux/ipc.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _UAPI_LINUX_IPC_H
   3 #define _UAPI_LINUX_IPC_H
   4
   5 #include <linux/types.h>
   6
   7 #define IPC_PRIVATE ((__kernel_key_t) 0)
   8
   9 /* Obsolete, used only for backwards compatibility and libc5 compiles */
  10 struct ipc_perm
  11 {
  12         __kernel_key_t  key;
  13         __kernel_uid_t  uid;
  14         __kernel_gid_t  gid;
  15         __kernel_uid_t  cuid;
  16         __kernel_gid_t  cgid;
  17         __kernel_mode_t mode;
  18         unsigned short  seq;
  19 };
  20
  21 /* Include the definition of ipc64_perm */
  22 #include <asm/ipcbuf.h>
  23
  24 /* resource get request flags */
  25 #define IPC_CREAT  00001000   /* create if key is nonexistent */
  26 #define IPC_EXCL   00002000   /* fail if key exists */
  27 #define IPC_NOWAIT 00004000   /* return error on wait */
  28
  29 /* these fields are used by the DIPC package so the kernel as standard
  30    should avoid using them if possible */
  31
  32 #define IPC_DIPC 00010000  /* make it distributed */
  33 #define IPC_OWN  00020000  /* this machine is the DIPC owner */
  34
  35 /*
  36  * Control commands used with semctl, msgctl and shmctl
  37  * see also specific commands in sem.h, msg.h and shm.h
  38  */
  39 #define IPC_RMID 0     /* remove resource */
  40 #define IPC_SET  1     /* set ipc_perm options */
  41 #define IPC_STAT 2     /* get ipc_perm options */
  42 #define IPC_INFO 3     /* see ipcs */
  43
  44 /*
  45  * Version flags for semctl, msgctl, and shmctl commands
  46  * These are passed as bitflags or-ed with the actual command
  47  */
  48 #define IPC_OLD 0       /* Old version (no 32-bit UID support on many
  49                            architectures) */
  50 #define IPC_64  0x0100  /* New version (support 32-bit UIDs, bigger
  51                            message sizes, etc. */
  52
  53 /*
  54  * These are used to wrap system calls.
  55  *
  56  * See architecture code for ugly details..
  57  */
  58 struct ipc_kludge {
  59         struct msgbuf __user *msgp;
  60         long msgtyp;
  61 };
  62
  63 #define SEMOP            1
  64 #define SEMGET           2
  65 #define SEMCTL           3
  66 #define SEMTIMEDOP       4
  67 #define MSGSND          11
  68 #define MSGRCV          12
  69 #define MSGGET          13
  70 #define MSGCTL          14
  71 #define SHMAT           21
  72 #define SHMDT           22
  73 #define SHMGET          23
  74 #define SHMCTL          24
  75
  76 /* Used by the DIPC package, try and avoid reusing it */
  77 #define DIPC            25
  78
  79 #define IPCCALL(version,op)     ((version)<<16 | (op))
  80
  81
  82 #endif /* _UAPI_LINUX_IPC_H */