sbin/ldconfig/ldconfig.c

   1 /*
   2  * Copyright (c) 1993,1995 Paul Kranenburg
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Paul Kranenburg.
  16  * 4. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * $FreeBSD: src/sbin/ldconfig/ldconfig.c,v 1.31.2.3 2001/07/11 23:59:10 obrien Exp $
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <sys/mman.h>
  37 #include <ctype.h>
  38 #include <dirent.h>
  39 #include <elf-hints.h>
  40 #include <err.h>
  41 #include <errno.h>
  42 #include <fcntl.h>
  43 #include <objformat.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <unistd.h>
  48
  49 #include "ldconfig.h"
  50
  51 #if DEBUG
  52 /* test */
  53 #undef _PATH_ELF_HINTS
  54 #define _PATH_ELF_HINTS         "./ld-elf.so.hints"
  55 #endif
  56
  57 #undef major
  58 #undef minor
  59
  60 static void             usage(void);
  61
  62 int
  63 main(int argc, char **argv)
  64 {
  65         static const char *hints_file;
  66         int c, justread = 0, merge = 0, rescan = 0;
  67
  68         if (argc > 1 && strcmp(argv[1], "-elf") == 0) {
  69                 /* skip over legacy -elf arg */
  70                 argc--;
  71                 argv++;
  72         }
  73
  74         hints_file = _PATH_ELF_HINTS;
  75         if (argc == 1)
  76                 rescan = 1;
  77         else while((c = getopt(argc, argv, "Rf:imrsv")) != -1) {
  78                 switch (c) {
  79                 case 'R':
  80                         rescan = 1;
  81                         break;
  82                 case 'f':
  83                         hints_file = optarg;
  84                         break;
  85                 case 'i':
  86                         insecure = 1;
  87                         break;
  88                 case 'm':
  89                         merge = 1;
  90                         break;
  91                 case 'r':
  92                         justread = 1;
  93                         break;
  94                 case 's':
  95                         /* does nothing */
  96                         break;
  97                 default:
  98                         usage();
  99                         break;
 100                 }
 101         }
 102
 103         if (justread)
 104                 list_elf_hints(hints_file);
 105         else
 106                 update_elf_hints(hints_file, argc - optind, argv + optind,
 107                                  merge || rescan);
 108         return(0);
 109 }
 110
 111 static void
 112 usage(void)
 113 {
 114         fprintf(stderr,
 115         "usage: ldconfig [-elf] [-Rimr] [-f hints_file] [dir | file ...]\n");
 116         exit(1);
 117 }