1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/* Copyright (C) 2004, 2010 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Robert Millan
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/*-
* Copyright (c) 2002 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sysdep.h>
#include <sys/sem.h>
#include <stdarg.h> /* va_list */
#include <stdlib.h> /* NULL */
#include <unistd.h>
#include <ipc_priv.h>
#include <sysdep.h>
#include <string.h>
#include <sys/syscall.h>
#include <bits/wordsize.h>
#include <shlib-compat.h>
/* union semun from FreeBSD <sys/sem.h> */
/*
* semctl's arg parameter structure
*/
union semun
{
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
struct semid_ds_old *oldbuf; /* buffer for IPC_STAT & IPC_SET */
unsigned short *array; /* array for GETALL & SETALL */
};
extern int __syscall_semctl (int semid, int semnum,
int cmd, union semun *arg);
libc_hidden_proto (__syscall_semctl)
int
__new_semctl (int semid, int semnum, int cmd, ...)
{
va_list ap;
union semun semun;
union semun *semun_ptr;
va_start (ap, cmd);
switch (cmd)
{
case SEM_STAT:
case IPC_SET:
case IPC_STAT:
case GETALL:
case SETVAL:
case SETALL:
semun = va_arg (ap, union semun);
semun_ptr = &semun;
break;
default:
semun_ptr = NULL;
}
va_end (ap);
return INLINE_SYSCALL (semctl, 4, semid, semnum, cmd, semun_ptr);
}
versioned_symbol (libc, __new_semctl, semctl, GLIBC_2_18);
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_18)
struct semid_ds_old
{
struct ipc_perm_old sem_perm; /* operation permission struct */
void *__sem_base;
unsigned short int sem_nsems; /* number of semaphores in set */
__time_t sem_otime; /* last semop() time */
long __unused1;
__time_t sem_ctime; /* last time changed by semctl() */
long __unused2;
long __unused3[4];
};
int
attribute_compat_text_section
__old_semctl (int semid, int semnum, int cmd, ...)
{
struct semid_ds newbuf;
struct semid_ds_old *buf;
int rv;
va_list ap;
union semun semun;
union semun *semun_ptr;
va_start (ap, cmd);
switch (cmd)
{
case SEM_STAT:
case IPC_SET:
case IPC_STAT:
semun = va_arg (ap, union semun);
buf = semun.oldbuf;
semun.buf = &newbuf;
semun_ptr = &semun;
break;
case GETALL:
case SETVAL:
case SETALL:
semun = va_arg (ap, union semun);
semun_ptr = &semun;
break;
default:
semun_ptr = NULL;
}
va_end (ap);
if (cmd == IPC_SET)
{
ipc_perm_old2new(&(buf->sem_perm), &(newbuf.sem_perm));
newbuf.__sem_base = buf->__sem_base;
newbuf.sem_nsems = buf->sem_nsems;
newbuf.sem_otime = buf->sem_otime;
newbuf.sem_ctime = buf->sem_ctime;
}
rv = INLINE_SYSCALL (semctl, 4, semid, semnum, cmd, semun_ptr);
if ((rv != -1) && ((cmd == IPC_STAT) || (cmd == SEM_STAT)))
{
ipc_perm_new2old(&(newbuf.sem_perm), &(buf->sem_perm));
buf->__sem_base = newbuf.__sem_base;
buf->sem_nsems = newbuf.sem_nsems;
buf->sem_otime = newbuf.sem_otime;
buf->sem_ctime = newbuf.sem_ctime;
}
return rv;
}
compat_symbol (libc, __old_semctl, semctl, GLIBC_2_0);
#endif
|
