| 1 | /* $NetBSD: ipc.h,v 1.36 2015/05/19 12:17:53 joerg Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1988 University of Utah. |
| 5 | * Copyright (c) 1990, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * (c) UNIX System Laboratories, Inc. |
| 8 | * All or some portions of this file are derived from material licensed |
| 9 | * to the University of California by American Telephone and Telegraph |
| 10 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 11 | * the permission of UNIX System Laboratories, Inc. |
| 12 | * |
| 13 | * This code is derived from software contributed to Berkeley by |
| 14 | * the Systems Programming Group of the University of Utah Computer |
| 15 | * Science Department. |
| 16 | * |
| 17 | * Redistribution and use in source and binary forms, with or without |
| 18 | * modification, are permitted provided that the following conditions |
| 19 | * are met: |
| 20 | * 1. Redistributions of source code must retain the above copyright |
| 21 | * notice, this list of conditions and the following disclaimer. |
| 22 | * 2. Redistributions in binary form must reproduce the above copyright |
| 23 | * notice, this list of conditions and the following disclaimer in the |
| 24 | * documentation and/or other materials provided with the distribution. |
| 25 | * 3. Neither the name of the University nor the names of its contributors |
| 26 | * may be used to endorse or promote products derived from this software |
| 27 | * without specific prior written permission. |
| 28 | * |
| 29 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 30 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 31 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 32 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 33 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 34 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 35 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 36 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 37 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 38 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 39 | * SUCH DAMAGE. |
| 40 | * |
| 41 | * @(#)ipc.h 8.4 (Berkeley) 2/19/95 |
| 42 | */ |
| 43 | |
| 44 | /* |
| 45 | * SVID compatible ipc.h file |
| 46 | */ |
| 47 | |
| 48 | #ifndef _SYS_IPC_H_ |
| 49 | #define _SYS_IPC_H_ |
| 50 | |
| 51 | #include <sys/featuretest.h> |
| 52 | #include <sys/types.h> |
| 53 | |
| 54 | struct ipc_perm { |
| 55 | uid_t uid; /* user id */ |
| 56 | gid_t gid; /* group id */ |
| 57 | uid_t cuid; /* creator user id */ |
| 58 | gid_t cgid; /* creator group id */ |
| 59 | mode_t mode; /* r/w permission */ |
| 60 | |
| 61 | /* |
| 62 | * These members are private and used only in the internal |
| 63 | * implementation of this interface. |
| 64 | */ |
| 65 | unsigned short _seq; /* sequence # (to generate unique |
| 66 | msg/sem/shm id) */ |
| 67 | key_t _key; /* user specified msg/sem/shm key */ |
| 68 | }; |
| 69 | |
| 70 | #if defined(_NETBSD_SOURCE) |
| 71 | /* Warning: 64-bit structure padding is needed here */ |
| 72 | struct ipc_perm_sysctl { |
| 73 | uint64_t _key; |
| 74 | uid_t uid; |
| 75 | gid_t gid; |
| 76 | uid_t cuid; |
| 77 | gid_t cgid; |
| 78 | mode_t mode; |
| 79 | int16_t _seq; |
| 80 | int16_t pad; |
| 81 | }; |
| 82 | #endif /* _NETBSD_SOURCE */ |
| 83 | |
| 84 | /* Common access type bits, used with ipcperm(). */ |
| 85 | #define IPC_R 000400 /* read permission */ |
| 86 | #define IPC_W 000200 /* write/alter permission */ |
| 87 | #define IPC_M 010000 /* permission to change control info */ |
| 88 | |
| 89 | /* X/Open required constants (same values as system 5) */ |
| 90 | #define IPC_CREAT 001000 /* create entry if key does not exist */ |
| 91 | #define IPC_EXCL 002000 /* fail if key exists */ |
| 92 | #define IPC_NOWAIT 004000 /* error if request must wait */ |
| 93 | |
| 94 | #define IPC_PRIVATE (key_t)0 /* private key */ |
| 95 | |
| 96 | #define IPC_RMID 0 /* remove identifier */ |
| 97 | #define IPC_SET 1 /* set options */ |
| 98 | #define IPC_STAT 2 /* get options */ |
| 99 | |
| 100 | /* |
| 101 | * Macros to convert between ipc ids and array indices or sequence ids. |
| 102 | * The first of these is used by ipcs(1), and so is defined outside the |
| 103 | * kernel as well. |
| 104 | */ |
| 105 | #if defined(_NETBSD_SOURCE) |
| 106 | #define IXSEQ_TO_IPCID(ix,perm) (((perm._seq) << 16) | (ix & 0xffff)) |
| 107 | #endif |
| 108 | |
| 109 | #ifdef _KERNEL |
| 110 | #include <sys/sysctl.h> |
| 111 | #define IPCID_TO_IX(id) ((id) & 0xffff) |
| 112 | #define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff) |
| 113 | |
| 114 | struct kauth_cred; |
| 115 | __BEGIN_DECLS |
| 116 | int ipcperm(struct kauth_cred *, struct ipc_perm *, int); |
| 117 | |
| 118 | void sysvipcinit(void); |
| 119 | void sysvipcfini(void); |
| 120 | __END_DECLS |
| 121 | |
| 122 | /* |
| 123 | * sysctl helper routine for kern.ipc.sysvipc_info subtree. |
| 124 | */ |
| 125 | |
| 126 | #define SYSCTL_FILL_PERM(src, dst) do { \ |
| 127 | (dst)._key = (src)._key; \ |
| 128 | (dst).uid = (src).uid; \ |
| 129 | (dst).gid = (src).gid; \ |
| 130 | (dst).cuid = (src).cuid; \ |
| 131 | (dst).cgid = (src).cgid; \ |
| 132 | (dst).mode = (src).mode; \ |
| 133 | (dst)._seq = (src)._seq; \ |
| 134 | } while (/*CONSTCOND*/ 0); |
| 135 | |
| 136 | /* |
| 137 | * Set-up the sysctl routine for COMPAT_50 |
| 138 | */ |
| 139 | |
| 140 | __BEGIN_DECLS |
| 141 | void sysvipc50_set_compat_sysctl(int (*)(SYSCTLFN_PROTO)); |
| 142 | __END_DECLS |
| 143 | |
| 144 | #else /* _KERNEL */ |
| 145 | __BEGIN_DECLS |
| 146 | key_t ftok(const char *, int); |
| 147 | __END_DECLS |
| 148 | #endif |
| 149 | #endif /* !_SYS_IPC_H_ */ |
| 150 | |