1 /*- 2 * Copyright (c) 2006,2008 Joseph Koshy 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 29 #include <ar.h> 30 #include <assert.h> 31 #include <libelf.h> 32 33 #include "_libelf.h" 34 35 ELFTC_VCSID("$Id: elf_getident.c 2225 2011-11-26 18:55:54Z jkoshy $"); 36 37 char * 38 elf_getident(Elf *e, size_t *sz) 39 { 40 41 if (e == NULL) { 42 LIBELF_SET_ERROR(ARGUMENT, 0); 43 goto error; 44 } 45 46 if (e->e_cmd == ELF_C_WRITE && e->e_rawfile == NULL) { 47 LIBELF_SET_ERROR(SEQUENCE, 0); 48 goto error; 49 } 50 51 assert(e->e_kind != ELF_K_AR || e->e_cmd == ELF_C_READ); 52 53 if (sz) { 54 if (e->e_kind == ELF_K_AR) 55 *sz = SARMAG; 56 else if (e->e_kind == ELF_K_ELF) 57 *sz = EI_NIDENT; 58 else 59 *sz = e->e_rawsize; 60 } 61 62 return ((char *) e->e_rawfile); 63 64 error: 65 if (sz) 66 *sz = 0; 67 return (NULL); 68 } 69