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 | |