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 <ar.h> 28 #include <assert.h> 29 #include <libelf.h> 30 31 #include "_libelf.h" 32 33 ELFTC_VCSID("$Id: elf_getident.c 3712 2019-03-16 22:23:34Z jkoshy $"); 34 35 char * 36 elf_getident(Elf *e, size_t *sz) 37 { 38 39 if (e == NULL) { 40 LIBELF_SET_ERROR(ARGUMENT, 0); 41 goto error; 42 } 43 44 if (e->e_cmd == ELF_C_WRITE && e->e_rawfile == NULL) { 45 LIBELF_SET_ERROR(SEQUENCE, 0); 46 goto error; 47 } 48 49 assert(e->e_kind != ELF_K_AR || e->e_cmd == ELF_C_READ); 50 51 if (sz) { 52 if (e->e_kind == ELF_K_AR) 53 *sz = SARMAG; 54 else if (e->e_kind == ELF_K_ELF) 55 *sz = EI_NIDENT; 56 else 57 *sz = (size_t) e->e_rawsize; 58 } 59 60 return ((char *) e->e_rawfile); 61 62 error: 63 if (sz) 64 *sz = 0; 65 return (NULL); 66 } 67