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
);