1 /*

     2  * version.c - implementation of the elf_version(3) function.

     3  * Copyright (C) 1995 - 1998, 2007 Michael Riepe

     4  *

     5  * This library is free software; you can redistribute it and/or

     6  * modify it under the terms of the GNU Library General Public

     7  * License as published by the Free Software Foundation; either

     8  * version 2 of the License, or (at your option) any later version.

     9  *

    10  * This library is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13  * Library General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU Library General Public

    16  * License along with this library; if not, write to the Free Software

    17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    18  */

    19 

    20 #include <private.h>

    21 

    22 #ifndef lint

    23 static const char rcsid[] = "@(#) $Id: version.c,v 1.7 2007/09/07 12:07:59 michael Exp $";

    24 #endif /* lint */

    25 

    26 unsigned

    27 elf_version(unsigned ver) {

    28     const char *s;

    29     unsigned tmp;

    30 

    31     if ((s = getenv("LIBELF_SANITY_CHECKS"))) {

    32 	_elf_sanity_checks = (int)strtol(s, (char**)NULL, 0);

    33     }

    34     if (ver == EV_NONE) {

    35 	return EV_CURRENT;

    36     }

    37     if (!valid_version(ver)) {

    38 	seterr(ERROR_UNKNOWN_VERSION);

    39 	return EV_NONE;

    40     }

    41     tmp = _elf_version == EV_NONE ? EV_CURRENT : _elf_version;

    42     _elf_version = ver;

    43     return tmp;

    44 }