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
|
/*
* Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
* Portions Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* src/backend/port/dynloader/openbsd.c
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)dl.c 5.4 (Berkeley) 2/23/91";
#endif /* LIBC_SCCS and not lint */
#include "postgres.h"
#include <nlist.h>
#include <link.h>
#include <dlfcn.h>
#include "dynloader.h"
static char error_message[BUFSIZ];
char *
BSD44_derived_dlerror(void)
{
static char ret[BUFSIZ];
strcpy(ret, error_message);
error_message[0] = 0;
return (ret[0] == 0) ? NULL : ret;
}
void *
BSD44_derived_dlopen(const char *file, int num)
{
#if !defined(HAVE_DLOPEN)
snprintf(error_message, sizeof(error_message),
"dlopen (%s) not supported", file);
return NULL;
#else
void *vp;
if ((vp = dlopen((char *) file, num)) == NULL)
snprintf(error_message, sizeof(error_message),
"dlopen (%s) failed: %s", file, dlerror());
return vp;
#endif
}
void *
BSD44_derived_dlsym(void *handle, const char *name)
{
#if !defined(HAVE_DLOPEN)
snprintf(error_message, sizeof(error_message),
"dlsym (%s) failed", name);
return NULL;
#else
void *vp;
#ifndef __ELF__
char buf[BUFSIZ];
if (*name != '_')
{
snprintf(buf, sizeof(buf), "_%s", name);
name = buf;
}
#endif /* !__ELF__ */
if ((vp = dlsym(handle, (char *) name)) == NULL)
snprintf(error_message, sizeof(error_message),
"dlsym (%s) failed", name);
return vp;
#endif
}
void
BSD44_derived_dlclose(void *handle)
{
#if defined(HAVE_DLOPEN)
dlclose(handle);
#endif
}
|
