1 /* $NetBSD: nlist.c,v 1.26 2024/10/21 07:08:41 skrll Exp $ */
2 
3 /*
4  * Copyright (c) 1989, 1993
5  *        The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of the University nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 /*
33  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
34  *
35  * Redistribution and use in source and binary forms, with or without
36  * modification, are permitted provided that the following conditions
37  * are met:
38  * 1. Redistributions of source code must retain the above copyright
39  *    notice, this list of conditions and the following disclaimer.
40  * 2. Redistributions in binary form must reproduce the above copyright
41  *    notice, this list of conditions and the following disclaimer in the
42  *    documentation and/or other materials provided with the distribution.
43  * 3. All advertising materials mentioning features or use of this software
44  *    must display the following acknowledgement:
45  *        This product includes software developed by the University of
46  *        California, Berkeley and its contributors.
47  * 4. Neither the name of the University nor the names of its contributors
48  *    may be used to endorse or promote products derived from this software
49  *    without specific prior written permission.
50  *
51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61  * SUCH DAMAGE.
62  */
63 
64 #include <sys/cdefs.h>
65 #if defined(LIBC_SCCS) && !defined(lint)
66 #if 0
67 static char sccsid[] = "@(#)nlist.c     8.1 (Berkeley) 6/4/93";
68 #else
69 __RCSID("$NetBSD: nlist.c,v 1.26 2024/10/21 07:08:41 skrll Exp $");
70 #endif
71 #endif /* LIBC_SCCS and not lint */
72 
73 #include "namespace.h"
74 #include <sys/param.h>
75 #include <sys/mman.h>
76 #include <sys/stat.h>
77 #include <sys/file.h>
78 
79 #include <assert.h>
80 #include <errno.h>
81 #include <stdio.h>
82 #include <string.h>
83 #include <unistd.h>
84 #include <nlist.h>
85 
86 #if 0
87 #ifdef __weak_alias
88 __weak_alias(nlist,_nlist)
89 #endif
90 #endif
91 
92 #include "nlist_private.h"
93 
94 static const struct {
95           int       (*fdnlist)(int, struct nlist *);
96 } fdnlist_fmts[] = {
97 #ifdef NLIST_AOUT
98           {         __fdnlist_aout                },
99 #endif
100 #ifdef NLIST_COFF
101           {         __fdnlist_coff                },
102 #endif
103 #ifdef NLIST_ECOFF
104           {         __fdnlist_ecoff               },
105 #endif
106 #ifdef NLIST_ELF32
107           {         __fdnlist_elf32               },
108 #endif
109 #ifdef NLIST_ELF64
110           {         __fdnlist_elf64               },
111 #endif
112 };
113 
114 int
nlist(const char * name,struct nlist * list)115 nlist(const char *name, struct nlist *list)
116 {
117           int fd, n;
118 
119           _DIAGASSERT(name != NULL);
120           _DIAGASSERT(list != NULL);
121 
122           fd = open(name, O_RDONLY | O_CLOEXEC, 0);
123           if (fd < 0)
124                     return (-1);
125           n = __fdnlist(fd, list);
126           (void)close(fd);
127           return (n);
128 }
129 
130 int
__fdnlist(int fd,struct nlist * list)131 __fdnlist(int fd, struct nlist *list)
132 {
133           size_t i;
134           int rv;
135 
136           _DIAGASSERT(fd != -1);
137           _DIAGASSERT(list != NULL);
138 
139           for (i = 0; i < sizeof(fdnlist_fmts) / sizeof(fdnlist_fmts[0]); i++)
140                     if ((rv = (*fdnlist_fmts[i].fdnlist)(fd, list)) != -1)
141                               return (rv);
142           return (-1);
143 }
144