Commit | Line | Data |
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984263bc | 1 | /* $FreeBSD: src/sys/kern/sysv_ipc.c,v 1.13.2.2 2000/07/01 14:33:49 bsd Exp $ */ |
2966ed3e | 2 | /* $DragonFly: src/sys/kern/sysv_ipc.c,v 1.8 2005/10/08 14:31:26 corecode Exp $ */ |
984263bc MD |
3 | /* $NetBSD: sysv_ipc.c,v 1.7 1994/06/29 06:33:11 cgd Exp $ */ |
4 | ||
5 | /* | |
6 | * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca> | |
7 | * All rights reserved. | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. All advertising materials mentioning features or use of this software | |
18 | * must display the following acknowledgement: | |
19 | * This product includes software developed by Herb Peyerl. | |
20 | * 4. The name of Herb Peyerl may not be used to endorse or promote products | |
21 | * derived from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
24 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
25 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
26 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
27 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
28 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
32 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
33 | */ | |
34 | ||
35 | #include "opt_sysvipc.h" | |
36 | ||
37 | #include <sys/param.h> | |
38 | #include <sys/ipc.h> | |
39 | #include <sys/proc.h> | |
895c1f85 | 40 | #include <sys/priv.h> |
984263bc MD |
41 | #include <sys/ucred.h> |
42 | ||
cd10cbaf SG |
43 | #define SYSCALL_NOT_PRESENT_GEN(SC, str) \ |
44 | int sys_##SC (struct SC##_args *uap) \ | |
45 | { \ | |
46 | sysv_nosys(str); \ | |
47 | return sys_nosys((struct nosys_args *)uap); \ | |
48 | } | |
49 | ||
984263bc MD |
50 | #if defined(SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) |
51 | ||
52 | /* | |
53 | * Check for ipc permission | |
54 | */ | |
55 | ||
56 | int | |
41c20dac | 57 | ipcperm(struct proc *p, struct ipc_perm *perm, int mode) |
984263bc MD |
58 | { |
59 | struct ucred *cred = p->p_ucred; | |
60 | ||
61 | /* Check for user match. */ | |
62 | if (cred->cr_uid != perm->cuid && cred->cr_uid != perm->uid) { | |
63 | if (mode & IPC_M) | |
895c1f85 | 64 | return (priv_check_cred(cred, PRIV_ROOT, 0) == 0 ? 0 : EPERM); |
984263bc MD |
65 | /* Check for group match. */ |
66 | mode >>= 3; | |
67 | if (!groupmember(perm->gid, cred) && | |
68 | !groupmember(perm->cgid, cred)) | |
69 | /* Check for `other' match. */ | |
70 | mode >>= 3; | |
71 | } | |
72 | ||
73 | if (mode & IPC_M) | |
74 | return (0); | |
dadab5e9 | 75 | return ((mode & perm->mode) == mode || |
895c1f85 | 76 | priv_check_cred(cred, PRIV_ROOT, 0) == 0 ? 0 : EACCES); |
984263bc MD |
77 | } |
78 | ||
79 | #endif /* defined(SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) */ | |
80 | ||
81 | ||
82 | #if !defined(SYSVSEM) || !defined(SYSVSHM) || !defined(SYSVMSG) | |
83 | ||
84 | #include <sys/proc.h> | |
85 | #include <sys/sem.h> | |
86 | #include <sys/shm.h> | |
87 | #include <sys/syslog.h> | |
88 | #include <sys/sysproto.h> | |
89 | #include <sys/systm.h> | |
90 | ||
402ed7e1 | 91 | static void sysv_nosys (char *s); |
984263bc MD |
92 | |
93 | static void | |
8976dead | 94 | sysv_nosys(char *s) |
984263bc | 95 | { |
8976dead MD |
96 | struct thread *td = curthread; |
97 | struct proc *p = td->td_proc; | |
98 | ||
984263bc | 99 | log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n", |
2966ed3e SS |
100 | (p ? p->p_comm : td->td_comm), |
101 | (p ? p->p_pid : -1), s); | |
984263bc MD |
102 | } |
103 | ||
104 | #if !defined(SYSVSEM) | |
105 | ||
106 | /* | |
107 | * SYSVSEM stubs | |
108 | */ | |
109 | ||
cd10cbaf SG |
110 | SYSCALL_NOT_PRESENT_GEN(semsys, "SYSVSEM"); |
111 | SYSCALL_NOT_PRESENT_GEN(__semctl, "SYSVSEM"); | |
112 | SYSCALL_NOT_PRESENT_GEN(semget, "SYSVSEM"); | |
113 | SYSCALL_NOT_PRESENT_GEN(semop, "SYSVSEM"); | |
984263bc MD |
114 | |
115 | /* called from kern_exit.c */ | |
116 | void | |
8976dead | 117 | semexit(struct proc *p) |
984263bc | 118 | { |
8976dead | 119 | /* empty */ |
984263bc MD |
120 | } |
121 | ||
122 | #endif /* !defined(SYSVSEM) */ | |
123 | ||
124 | ||
125 | #if !defined(SYSVMSG) | |
126 | ||
127 | /* | |
128 | * SYSVMSG stubs | |
8976dead MD |
129 | * |
130 | * note: msgsys args actually var-args? YYYY | |
984263bc MD |
131 | */ |
132 | ||
cd10cbaf SG |
133 | SYSCALL_NOT_PRESENT_GEN(msgsys, "SYSVMSG"); |
134 | SYSCALL_NOT_PRESENT_GEN(msgctl, "SYSVMSG"); | |
135 | SYSCALL_NOT_PRESENT_GEN(msgget, "SYSVMSG"); | |
136 | SYSCALL_NOT_PRESENT_GEN(msgsnd, "SYSVMSG"); | |
137 | SYSCALL_NOT_PRESENT_GEN(msgrcv, "SYSVMSG"); | |
984263bc MD |
138 | |
139 | #endif /* !defined(SYSVMSG) */ | |
140 | ||
141 | ||
142 | #if !defined(SYSVSHM) | |
143 | ||
144 | /* | |
145 | * SYSVSHM stubs | |
146 | */ | |
147 | ||
cd10cbaf SG |
148 | SYSCALL_NOT_PRESENT_GEN(shmdt, "SYSVSHM"); |
149 | SYSCALL_NOT_PRESENT_GEN(shmat, "SYSVSHM"); | |
150 | SYSCALL_NOT_PRESENT_GEN(shmctl, "SYSVSHM"); | |
151 | SYSCALL_NOT_PRESENT_GEN(shmget, "SYSVSHM"); | |
152 | SYSCALL_NOT_PRESENT_GEN(shmsys, "SYSVSHM"); | |
984263bc MD |
153 | |
154 | /* called from kern_fork.c */ | |
155 | void | |
8976dead | 156 | shmfork(struct proc *p1, struct proc *p2) |
984263bc | 157 | { |
8976dead | 158 | /* empty */ |
984263bc MD |
159 | } |
160 | ||
161 | /* called from kern_exit.c */ | |
162 | void | |
fef0fdf2 | 163 | shmexit(struct vmspace *vm) |
984263bc | 164 | { |
8976dead | 165 | /* empty */ |
984263bc MD |
166 | } |
167 | ||
168 | #endif /* !defined(SYSVSHM) */ | |
169 | ||
170 | #endif /* !defined(SYSVSEM) || !defined(SYSVSHM) || !defined(SYSVMSG) */ |