xref: /freebsd/lib/libc/gen/semctl.c (revision 3157ba21)
1 /*-
2  * Copyright (c) 2002 Doug Rabson
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  */
27 
28 
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #define _WANT_SEMUN_OLD
33 
34 #include <sys/types.h>
35 #include <sys/ipc.h>
36 #include <sys/sem.h>
37 #include <stdarg.h>
38 #include <stdlib.h>
39 
40 int	__semctl(int semid, int semnum, int cmd, union semun *arg);
41 int	freebsd7___semctl(int semid, int semnum, int cmd, union semun_old *arg);
42 
43 int
44 semctl(int semid, int semnum, int cmd, ...)
45 {
46 	va_list ap;
47 	union semun semun;
48 	union semun *semun_ptr;
49 
50 	va_start(ap, cmd);
51 	if (cmd == IPC_SET || cmd == IPC_STAT || cmd == GETALL
52 	    || cmd == SETVAL || cmd == SETALL) {
53 		semun = va_arg(ap, union semun);
54 		semun_ptr = &semun;
55 	} else {
56 		semun_ptr = NULL;
57 	}
58 	va_end(ap);
59 
60 	return (__semctl(semid, semnum, cmd, semun_ptr));
61 }
62 
63 int
64 freebsd7_semctl(int semid, int semnum, int cmd, ...)
65 {
66 	va_list ap;
67 	union semun_old semun;
68 	union semun_old *semun_ptr;
69 
70 	va_start(ap, cmd);
71 	if (cmd == IPC_SET || cmd == IPC_STAT || cmd == GETALL
72 	    || cmd == SETVAL || cmd == SETALL) {
73 		semun = va_arg(ap, union semun_old);
74 		semun_ptr = &semun;
75 	} else {
76 		semun_ptr = NULL;
77 	}
78 	va_end(ap);
79 
80 	return (freebsd7___semctl(semid, semnum, cmd, semun_ptr));
81 }
82 
83 __sym_compat(semctl, freebsd7_semctl, FBSD_1.0);
84