FreeBSD/Linux Kernel Cross Reference
sys/kern/sysv_ipc.c
1 /* $FreeBSD$ */
2 /* $NetBSD: sysv_ipc.c,v 1.7 1994/06/29 06:33:11 cgd Exp $ */
3
4 /*
5 * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Herb Peyerl.
19 * 4. The name of Herb Peyerl may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include "opt_sysvipc.h"
35
36 #include <sys/param.h>
37 #include <sys/ipc.h>
38 #include <sys/ucred.h>
39
40 #if defined(SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG)
41
42 /*
43 * Check for ipc permission
44 */
45
46 int
47 ipcperm(cred, perm, mode)
48 struct ucred *cred;
49 struct ipc_perm *perm;
50 int mode;
51 {
52
53 if (cred->cr_uid == 0)
54 return (0);
55
56 /* Check for user match. */
57 if (cred->cr_uid != perm->cuid && cred->cr_uid != perm->uid) {
58 if (mode & IPC_M)
59 return (EPERM);
60 /* Check for group match. */
61 mode >>= 3;
62 if (!groupmember(perm->gid, cred) &&
63 !groupmember(perm->cgid, cred))
64 /* Check for `other' match. */
65 mode >>= 3;
66 }
67
68 if (mode & IPC_M)
69 return (0);
70 return ((mode & perm->mode) == mode ? 0 : EACCES);
71 }
72
73 #endif /* defined(SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) */
74
75
76 #if !defined(SYSVSEM) || !defined(SYSVSHM) || !defined(SYSVMSG)
77
78 #include <sys/proc.h>
79 #include <sys/sem.h>
80 #include <sys/shm.h>
81 #include <sys/syslog.h>
82 #include <sys/sysproto.h>
83 #include <sys/systm.h>
84
85 static void sysv_nosys __P((struct proc *p, char *s));
86
87 static void
88 sysv_nosys(p, s)
89 struct proc *p;
90 char *s;
91 {
92 log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
93 p->p_comm, p->p_pid, s);
94 }
95
96 #if !defined(SYSVSEM)
97
98 /*
99 * SYSVSEM stubs
100 */
101
102 int
103 semsys(p, uap)
104 struct proc *p;
105 struct semsys_args *uap;
106 {
107 sysv_nosys(p, "SYSVSEM");
108 return nosys(p, (struct nosys_args *)uap);
109 };
110
111 int
112 __semctl(p, uap)
113 struct proc *p;
114 register struct __semctl_args *uap;
115 {
116 sysv_nosys(p, "SYSVSEM");
117 return nosys(p, (struct nosys_args *)uap);
118 };
119
120 int
121 semget(p, uap)
122 struct proc *p;
123 register struct semget_args *uap;
124 {
125 sysv_nosys(p, "SYSVSEM");
126 return nosys(p, (struct nosys_args *)uap);
127 };
128
129 int
130 semop(p, uap)
131 struct proc *p;
132 register struct semop_args *uap;
133 {
134 sysv_nosys(p, "SYSVSEM");
135 return nosys(p, (struct nosys_args *)uap);
136 };
137
138 /* called from kern_exit.c */
139 void
140 semexit(p)
141 struct proc *p;
142 {
143 return;
144 }
145
146 #endif /* !defined(SYSVSEM) */
147
148
149 #if !defined(SYSVMSG)
150
151 /*
152 * SYSVMSG stubs
153 */
154
155 int
156 msgsys(p, uap)
157 struct proc *p;
158 /* XXX actually varargs. */
159 struct msgsys_args *uap;
160 {
161 sysv_nosys(p, "SYSVMSG");
162 return nosys(p, (struct nosys_args *)uap);
163 };
164
165 int
166 msgctl(p, uap)
167 struct proc *p;
168 register struct msgctl_args *uap;
169 {
170 sysv_nosys(p, "SYSVMSG");
171 return nosys(p, (struct nosys_args *)uap);
172 };
173
174 int
175 msgget(p, uap)
176 struct proc *p;
177 register struct msgget_args *uap;
178 {
179 sysv_nosys(p, "SYSVMSG");
180 return nosys(p, (struct nosys_args *)uap);
181 };
182
183 int
184 msgsnd(p, uap)
185 struct proc *p;
186 register struct msgsnd_args *uap;
187 {
188 sysv_nosys(p, "SYSVMSG");
189 return nosys(p, (struct nosys_args *)uap);
190 };
191
192 int
193 msgrcv(p, uap)
194 struct proc *p;
195 register struct msgrcv_args *uap;
196 {
197 sysv_nosys(p, "SYSVMSG");
198 return nosys(p, (struct nosys_args *)uap);
199 };
200
201 #endif /* !defined(SYSVMSG) */
202
203
204 #if !defined(SYSVSHM)
205
206 /*
207 * SYSVSHM stubs
208 */
209
210 int
211 shmdt(p, uap)
212 struct proc *p;
213 struct shmdt_args *uap;
214 {
215 sysv_nosys(p, "SYSVSHM");
216 return nosys(p, (struct nosys_args *)uap);
217 };
218
219 int
220 shmat(p, uap)
221 struct proc *p;
222 struct shmat_args *uap;
223 {
224 sysv_nosys(p, "SYSVSHM");
225 return nosys(p, (struct nosys_args *)uap);
226 };
227
228 int
229 shmctl(p, uap)
230 struct proc *p;
231 struct shmctl_args *uap;
232 {
233 sysv_nosys(p, "SYSVSHM");
234 return nosys(p, (struct nosys_args *)uap);
235 };
236
237 int
238 shmget(p, uap)
239 struct proc *p;
240 struct shmget_args *uap;
241 {
242 sysv_nosys(p, "SYSVSHM");
243 return nosys(p, (struct nosys_args *)uap);
244 };
245
246 int
247 shmsys(p, uap)
248 struct proc *p;
249 /* XXX actually varargs. */
250 struct shmsys_args *uap;
251 {
252 sysv_nosys(p, "SYSVSHM");
253 return nosys(p, (struct nosys_args *)uap);
254 };
255
256 /* called from kern_fork.c */
257 void
258 shmfork(p1, p2)
259 struct proc *p1, *p2;
260 {
261 return;
262 }
263
264 /* called from kern_exit.c */
265 void
266 shmexit(p)
267 struct proc *p;
268 {
269 return;
270 }
271
272 #endif /* !defined(SYSVSHM) */
273
274 #endif /* !defined(SYSVSEM) || !defined(SYSVSHM) || !defined(SYSVMSG) */
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