12de3b87aSKai Wang.\" Copyright (c) 2006,2008 Joseph Koshy. All rights reserved. 22de3b87aSKai Wang.\" 32de3b87aSKai Wang.\" Redistribution and use in source and binary forms, with or without 42de3b87aSKai Wang.\" modification, are permitted provided that the following conditions 52de3b87aSKai Wang.\" are met: 62de3b87aSKai Wang.\" 1. Redistributions of source code must retain the above copyright 72de3b87aSKai Wang.\" notice, this list of conditions and the following disclaimer. 82de3b87aSKai Wang.\" 2. Redistributions in binary form must reproduce the above copyright 92de3b87aSKai Wang.\" notice, this list of conditions and the following disclaimer in the 102de3b87aSKai Wang.\" documentation and/or other materials provided with the distribution. 112de3b87aSKai Wang.\" 122de3b87aSKai Wang.\" This software is provided by Joseph Koshy ``as is'' and 132de3b87aSKai Wang.\" any express or implied warranties, including, but not limited to, the 142de3b87aSKai Wang.\" implied warranties of merchantability and fitness for a particular purpose 152de3b87aSKai Wang.\" are disclaimed. in no event shall Joseph Koshy be liable 162de3b87aSKai Wang.\" for any direct, indirect, incidental, special, exemplary, or consequential 172de3b87aSKai Wang.\" damages (including, but not limited to, procurement of substitute goods 182de3b87aSKai Wang.\" or services; loss of use, data, or profits; or business interruption) 192de3b87aSKai Wang.\" however caused and on any theory of liability, whether in contract, strict 202de3b87aSKai Wang.\" liability, or tort (including negligence or otherwise) arising in any way 212de3b87aSKai Wang.\" out of the use of this software, even if advised of the possibility of 222de3b87aSKai Wang.\" such damage. 232de3b87aSKai Wang.\" 24*ae500c1fSEd Maste.\" $Id: elf_version.3 3639 2018-10-14 14:07:02Z jkoshy $ 252de3b87aSKai Wang.\" 262de3b87aSKai Wang.Dd November 9, 2011 272de3b87aSKai Wang.Dt ELF_VERSION 3 28*ae500c1fSEd Maste.Os 292de3b87aSKai Wang.Sh NAME 302de3b87aSKai Wang.Nm elf_version 312de3b87aSKai Wang.Nd retrieve or set ELF library operating version 322de3b87aSKai Wang.Sh LIBRARY 332de3b87aSKai Wang.Lb libelf 342de3b87aSKai Wang.Sh SYNOPSIS 352de3b87aSKai Wang.In libelf.h 362de3b87aSKai Wang.Ft unsigned int 372de3b87aSKai Wang.Fn elf_version "unsigned int version" 382de3b87aSKai Wang.Sh DESCRIPTION 392de3b87aSKai WangThe 402de3b87aSKai Wang.Fn elf_version 412de3b87aSKai Wangfunction is used to query the current operating version of the ELF 422de3b87aSKai Wanglibrary, and to inform the ELF library about the application's desired 432de3b87aSKai Wangoperating version. 442de3b87aSKai Wang.Pp 452de3b87aSKai WangIf the argument 462de3b87aSKai Wang.Ar version 472de3b87aSKai Wangis 482de3b87aSKai Wang.Dv EV_NONE , 492de3b87aSKai Wangthe 502de3b87aSKai Wang.Fn elf_version 512de3b87aSKai Wangfunction returns the currently configured operating version for the 522de3b87aSKai WangELF library. 532de3b87aSKai Wang.Pp 542de3b87aSKai WangIf the argument 552de3b87aSKai Wang.Ar version 562de3b87aSKai Wangis not 572de3b87aSKai Wang.Dv EV_NONE , 582de3b87aSKai Wangand if argument 592de3b87aSKai Wang.Ar version 602de3b87aSKai Wangis supported by the ELF library, function 612de3b87aSKai Wang.Fn elf_version 622de3b87aSKai Wangsets the library's operating version to 632de3b87aSKai Wang.Ar version , 642de3b87aSKai Wangand returns the previous value of the operating version. 652de3b87aSKai WangIf argument 662de3b87aSKai Wang.Ar version 672de3b87aSKai Wangcannot be supported, then the 682de3b87aSKai Wang.Fn elf_version 692de3b87aSKai Wangfunction returns 702de3b87aSKai Wang.Dv EV_NONE . 712de3b87aSKai Wang.Sh RETURN VALUES 722de3b87aSKai WangThe 732de3b87aSKai Wang.Fn elf_version 742de3b87aSKai Wangfunction returns the currently configured ELF library version, or 752de3b87aSKai Wang.Dv EV_NONE 762de3b87aSKai Wangif an unsupported version is requested. 772de3b87aSKai Wang.Sh EXAMPLES 782de3b87aSKai WangAn application program would inform the ELF library about its desired 792de3b87aSKai Wangoperating version and check for an error using the following code 802de3b87aSKai Wangsnippet: 812de3b87aSKai Wang.Bd -literal -offset indent 822de3b87aSKai Wangif (elf_version(EV_CURRENT) == EV_NONE) 832de3b87aSKai Wang err(EXIT_FAILURE, "ELF library too old"); 842de3b87aSKai Wang.Ed 852de3b87aSKai Wang.Sh ERRORS 862de3b87aSKai WangFunction 872de3b87aSKai Wang.Fn elf_version 882de3b87aSKai Wangmay fail with the following error: 892de3b87aSKai Wang.Bl -tag -width "[ELF_E_RESOURCE]" 902de3b87aSKai Wang.It Bq Er "ELF_E_VERSION" 912de3b87aSKai WangAn unsupported library version number was requested. 922de3b87aSKai Wang.El 932de3b87aSKai Wang.Sh SEE ALSO 942de3b87aSKai Wang.Xr elf 3 , 952de3b87aSKai Wang.Xr gelf 3 96