1 /* Test program for dwelf_elf_gnu_build_id, print build ID. 2 Copyright (C) 2014 Red Hat, Inc. 3 This file is part of elfutils. 4 5 This file is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 elfutils is distributed in the hope that it will be useful, but 11 WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #include <config.h> 19 #include <assert.h> 20 #include <inttypes.h> 21 #include <err.h> 22 #include <errno.h> 23 #include ELFUTILS_HEADER(elf) 24 #include ELFUTILS_HEADER(dwelf) 25 #include <stdio.h> 26 #include <error.h> 27 #include <string.h> 28 #include <stdlib.h> 29 #include <sys/types.h> 30 #include <sys/stat.h> 31 #include <fcntl.h> 32 #include <unistd.h> 33 34 int 35 main (int argc, char *argv[]) 36 { 37 if (argc < 2) 38 error (EXIT_FAILURE, 0, "No input file given"); 39 40 elf_version (EV_CURRENT); 41 42 for (int i = 1; i < argc; i++) 43 { 44 const char *file = argv[i]; 45 int fd = open (file, O_RDONLY); 46 if (fd < 0) 47 error (EXIT_FAILURE, errno, "couldn't open file '%s'", file); 48 49 Elf *elf = elf_begin (fd, ELF_C_READ, NULL); 50 if (elf == NULL) 51 { 52 printf("%s: elf_begin failed: %s\n", file, elf_errmsg (-1)); 53 close (fd); 54 continue; 55 } 56 57 const void *build_id; 58 ssize_t len = dwelf_elf_gnu_build_id (elf, &build_id); 59 switch (len) 60 { 61 case 0: 62 printf ("%s: <no NT_GNU_BUILD_ID note>\n", file); 63 break; 64 case -1: 65 errx (1, "dwelf_elf_gnu_build_id (%s): %s", 66 file, elf_errmsg (-1)); 67 default: 68 printf ("%s: build ID: ", file); 69 const unsigned char *p = build_id; 70 const unsigned char *end = p + len; 71 while (p < end) 72 printf("%02x", (unsigned)*p++); 73 putchar('\n'); 74 } 75 76 elf_end (elf); 77 close (fd); 78 } 79 80 return 0; 81 } 82
