lib/libc/gen/nlist.c

   1 /* $NetBSD: nlist.c,v 1.24 2012/03/21 15:32:26 christos 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 1.24 2012/03/21 15:32:26 christos 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, 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 }