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      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
    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
    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