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git.saurik.com Git - apple/libc.git/blob - sys/semctl.c
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2 * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
4 * @APPLE_LICENSE_HEADER_START@
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
21 * @APPLE_LICENSE_HEADER_END@
30 * Because KERNEL is defined, including errno.h doesn't define errno, so
31 * we have to do it ourselves.
33 extern int * __error(void);
34 #define errno (*__error())
35 #endif /* !__DARWIN_UNIX03 */
38 * Stub function to account for the differences in the ipc_perm structure,
39 * while maintaining binary backward compatibility.
41 extern int __semctl(int semid
, int semnum
, int cmd
, void *);
44 semctl(int semid
, int semnum
, int cmd
, ...)
50 struct __semid_ds_new
*ds
;
54 val
= va_arg(ap
, int);
55 rv
= __semctl(semid
, semnum
, cmd
, (void *)val
);
57 ds
= va_arg(ap
, struct __semid_ds_new
*);
58 rv
= __semctl(semid
, semnum
, cmd
, (void *)ds
);
63 #else /* !__DARWIN_UNIX03 */
64 struct __semid_ds_new ds
;
65 struct __semid_ds_new
*ds_new
= &ds
;
66 struct __semid_ds_old
*ds_old
= NULL
;
70 val
= va_arg(ap
, int);
72 ds_old
= va_arg(ap
, struct __semid_ds_old
*);
75 #define _UP_CVT(x) ds_new-> x = ds_old-> x
76 #define _DN_CVT(x) ds_old-> x = ds_new-> x
78 if ((cmd
== IPC_SET
|| cmd
== IPC_STAT
) && ds_old
== NULL
) {
79 /* Return EFAULT if ds_old is NULL (like the kernel would do) */
84 /* convert before call */
85 _UP_CVT(sem_perm
.uid
);
86 _UP_CVT(sem_perm
.gid
);
87 _UP_CVT(sem_perm
.cuid
);
88 _UP_CVT(sem_perm
.cgid
);
89 _UP_CVT(sem_perm
.mode
);
90 ds_new
->sem_perm
._seq
= ds_old
->sem_perm
.seq
;
91 ds_new
->sem_perm
._key
= ds_old
->sem_perm
.key
;
95 _UP_CVT(sem_pad1
); /* binary compatibility */
97 _UP_CVT(sem_pad2
); /* binary compatibility */
98 _UP_CVT(sem_pad3
[0]); /* binary compatibility */
99 _UP_CVT(sem_pad3
[1]); /* binary compatibility */
100 _UP_CVT(sem_pad3
[2]); /* binary compatibility */
101 _UP_CVT(sem_pad3
[3]); /* binary compatibility */
105 /* syscall must use LP64 quantities */
106 rv
= __semctl(semid
, semnum
, cmd
, (void *)val
);
110 rv
= __semctl(semid
, semnum
, cmd
, ds_new
);
113 rv
= __semctl(semid
, semnum
, cmd
, ds_old
);
117 if (cmd
== IPC_STAT
) {
118 /* convert after call */
119 _DN_CVT(sem_perm
.uid
); /* warning! precision loss! */
120 _DN_CVT(sem_perm
.gid
); /* warning! precision loss! */
121 _DN_CVT(sem_perm
.cuid
); /* warning! precision loss! */
122 _DN_CVT(sem_perm
.cgid
); /* warning! precision loss! */
123 _DN_CVT(sem_perm
.mode
);
124 ds_old
->sem_perm
.seq
= ds_new
->sem_perm
._seq
;
125 ds_old
->sem_perm
.key
= ds_new
->sem_perm
._key
;
129 _DN_CVT(sem_pad1
); /* binary compatibility */
131 _DN_CVT(sem_pad2
); /* binary compatibility */
132 _DN_CVT(sem_pad3
[0]); /* binary compatibility */
133 _DN_CVT(sem_pad3
[1]); /* binary compatibility */
134 _DN_CVT(sem_pad3
[2]); /* binary compatibility */
135 _DN_CVT(sem_pad3
[3]); /* binary compatibility */
139 #endif /* !__DARWIN_UNIX03 */