Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame^] | 1 | /* Copyright (C) 1999, 2000, 2002 Red Hat, Inc. |
| 2 | Written by Ulrich Drepper <drepper@redhat.com>, 1999. |
| 3 | |
| 4 | This program is Open Source software; you can redistribute it and/or |
| 5 | modify it under the terms of the Open Software License version 1.0 as |
| 6 | published by the Open Source Initiative. |
| 7 | |
| 8 | You should have received a copy of the Open Software License along |
| 9 | with this program; if not, you may obtain a copy of the Open Software |
| 10 | License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| 11 | by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 12 | 3001 King Ranch Road, Ukiah, CA 95482. */ |
| 13 | |
| 14 | #include <config.h> |
| 15 | |
| 16 | #include <fcntl.h> |
| 17 | #include <libelf.h> |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <unistd.h> |
| 21 | |
| 22 | |
| 23 | int |
| 24 | main (int argc, char *argv[]) |
| 25 | { |
| 26 | int fd; |
| 27 | FILE *fp; |
| 28 | Elf *elf; |
| 29 | Elf_Arsym *arsym; |
| 30 | size_t narsym; |
| 31 | |
| 32 | if (argc < 3) |
| 33 | exit (1); |
| 34 | |
| 35 | /* Open the archive. */ |
| 36 | fd = open (argv[1], O_RDONLY); |
| 37 | if (fd == -1) |
| 38 | { |
| 39 | printf ("Cannot open input file: %m"); |
| 40 | exit (1); |
| 41 | } |
| 42 | |
| 43 | /* Open the output file. */ |
| 44 | fp = fopen (argv[2], "w"); |
| 45 | if (fp == NULL) |
| 46 | { |
| 47 | printf ("Cannot open output file: %m"); |
| 48 | exit (1); |
| 49 | } |
| 50 | |
| 51 | /* Set the ELF version. */ |
| 52 | elf_version (EV_CURRENT); |
| 53 | |
| 54 | /* Create an ELF descriptor. */ |
| 55 | elf = elf_begin (fd, ELF_C_READ, NULL); |
| 56 | if (elf == NULL) |
| 57 | { |
| 58 | printf ("Cannot create ELF descriptor: %s\n", elf_errmsg (-1)); |
| 59 | exit (1); |
| 60 | } |
| 61 | |
| 62 | /* If it is no archive punt. */ |
| 63 | if (elf_kind (elf) != ELF_K_AR) |
| 64 | { |
| 65 | printf ("`%s' is no archive\n", argv[1]); |
| 66 | exit (1); |
| 67 | } |
| 68 | |
| 69 | /* Now get the index of the archive. */ |
| 70 | arsym = elf_getarsym (elf, &narsym); |
| 71 | if (arsym == NULL) |
| 72 | { |
| 73 | printf ("Cannot get archive index: %s\n", elf_errmsg (-1)); |
| 74 | exit (1); |
| 75 | } |
| 76 | |
| 77 | /* If there is no element in the index do nothing. There always is |
| 78 | an empty entry at the end which is included in the count and |
| 79 | which we want to skip. */ |
| 80 | if (narsym-- > 1) |
| 81 | while (narsym-- > 0) |
| 82 | { |
| 83 | Elf *subelf; |
| 84 | Elf_Arhdr *arhdr; |
| 85 | |
| 86 | if (elf_rand (elf, arsym[narsym].as_off) != arsym[narsym].as_off) |
| 87 | { |
| 88 | printf ("random access for symbol `%s' fails: %s\n", |
| 89 | arsym[narsym].as_name, elf_errmsg (-1)); |
| 90 | exit (1); |
| 91 | } |
| 92 | |
| 93 | subelf = elf_begin (fd, ELF_C_READ, elf); |
| 94 | if (subelf == NULL) |
| 95 | { |
| 96 | printf ("Cannot create ELF descriptor for archive member: %s\n", |
| 97 | elf_errmsg (-1)); |
| 98 | exit (1); |
| 99 | } |
| 100 | |
| 101 | arhdr = elf_getarhdr (subelf); |
| 102 | if (arhdr == NULL) |
| 103 | { |
| 104 | printf ("Cannot get archive header for element `%s': %s\n", |
| 105 | arsym[narsym].as_name, elf_errmsg (-1)); |
| 106 | exit (1); |
| 107 | } |
| 108 | |
| 109 | /* Now print what we actually want. */ |
| 110 | fprintf (fp, "%s in %s\n", arsym[narsym].as_name, arhdr->ar_name); |
| 111 | |
| 112 | /* Free the ELF descriptor. */ |
| 113 | if (elf_end (subelf) != 0) |
| 114 | { |
| 115 | printf ("Error while freeing subELF descriptor: %s\n", |
| 116 | elf_errmsg (-1)); |
| 117 | exit (1); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /* Free the ELF descriptor. */ |
| 122 | if (elf_end (elf) != 0) |
| 123 | { |
| 124 | printf ("Error while freeing ELF descriptor: %s\n", elf_errmsg (-1)); |
| 125 | exit (1); |
| 126 | } |
| 127 | |
| 128 | close (fd); |
| 129 | fclose (fp); |
| 130 | |
| 131 | return 0; |
| 132 | } |