1 /* Copyright (C) 1995,1997,1998,2000,2003,2004,2006
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
28 #include <sys/syscall.h>
30 #include <kernel-features.h>
31 #include <shlib-compat.h>
35 struct __old_ipc_perm sem_perm; /* operation permission struct */
36 __time_t sem_otime; /* last semop() time */
37 __time_t sem_ctime; /* last time changed by semctl() */
38 struct sem *__sembase; /* ptr to first semaphore in array */
39 struct sem_queue *__sem_pending; /* pending operations */
40 struct sem_queue *__sem_pending_last; /* last pending operation */
41 struct sem_undo *__undo; /* ondo requests on this array */
42 unsigned short int sem_nsems; /* number of semaphores in set */
45 /* Define a `union semun' suitable for Linux here. */
48 int val; /* value for SETVAL */
49 struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
50 unsigned short int *array; /* array for GETALL & SETALL */
51 struct seminfo *__buf; /* buffer for IPC_INFO */
52 struct __old_semid_ds *__old_buf;
55 #include <bp-checks.h>
56 #include <bp-semctl.h> /* definition of CHECK_SEMCTL needs union semum */
59 # if __ASSUME_32BITUIDS == 0
60 /* This variable is shared with all files that need to check for 32bit
62 extern int __libc_missing_32bit_uids;
66 /* Return identifier for array of NSEMS semaphores associated with
68 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
69 int __old_semctl (int semid, int semnum, int cmd, ...);
71 int __new_semctl (int semid, int semnum, int cmd, ...);
73 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
75 attribute_compat_text_section
76 __old_semctl (int semid, int semnum, int cmd, ...)
83 /* Get the argument. */
84 arg = va_arg (ap, union semun);
88 return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd,
89 CHECK_SEMCTL (&arg, semid, cmd));
91 compat_symbol (libc, __old_semctl, semctl, GLIBC_2_0);
95 __new_semctl (int semid, int semnum, int cmd, ...)
102 /* Get the argument. */
103 arg = va_arg (ap, union semun);
107 #if __ASSUME_32BITUIDS > 0
108 return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd | __IPC_64,
109 CHECK_SEMCTL (&arg, semid, cmd | __IPC_64));
117 return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd,
118 CHECK_SEMCTL (&arg, semid, cmd));
123 struct __old_semid_ds old;
124 struct semid_ds *buf;
127 if (__libc_missing_32bit_uids <= 0)
129 if (__libc_missing_32bit_uids < 0)
131 int save_errno = errno;
133 /* Test presence of new IPC by testing for getuid32 syscall. */
134 result = INLINE_SYSCALL (getuid32, 0);
135 if (result == -1 && errno == ENOSYS)
136 __libc_missing_32bit_uids = 1;
138 __libc_missing_32bit_uids = 0;
139 __set_errno(save_errno);
141 if (__libc_missing_32bit_uids <= 0)
143 result = INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd | __IPC_64,
144 CHECK_SEMCTL (&arg, semid, cmd | __IPC_64));
151 arg.__old_buf = &old;
154 old.sem_perm.uid = buf->sem_perm.uid;
155 old.sem_perm.gid = buf->sem_perm.gid;
156 old.sem_perm.mode = buf->sem_perm.mode;
157 if (old.sem_perm.uid != buf->sem_perm.uid ||
158 old.sem_perm.gid != buf->sem_perm.gid)
160 __set_errno (EINVAL);
164 result = INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd,
165 CHECK_SEMCTL (&arg, semid, cmd));
166 if (result != -1 && cmd != IPC_SET)
168 memset(buf, 0, sizeof(*buf));
169 buf->sem_perm.__key = old.sem_perm.__key;
170 buf->sem_perm.uid = old.sem_perm.uid;
171 buf->sem_perm.gid = old.sem_perm.gid;
172 buf->sem_perm.cuid = old.sem_perm.cuid;
173 buf->sem_perm.cgid = old.sem_perm.cgid;
174 buf->sem_perm.mode = old.sem_perm.mode;
175 buf->sem_perm.__seq = old.sem_perm.__seq;
176 buf->sem_otime = old.sem_otime;
177 buf->sem_ctime = old.sem_ctime;
178 buf->sem_nsems = old.sem_nsems;
185 versioned_symbol (libc, __new_semctl, semctl, GLIBC_2_2);