96 lines
2.9 KiB
Groff
96 lines
2.9 KiB
Groff
|
.\" Copyright (c) 2006,2008 Joseph Koshy. All rights reserved.
|
||
|
|
.\"
|
||
|
|
.\" Redistribution and use in source and binary forms, with or without
|
||
|
|
.\" modification, are permitted provided that the following conditions
|
||
|
|
.\" are met:
|
||
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer.
|
||
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
||
|
|
.\" documentation and/or other materials provided with the distribution.
|
||
|
|
.\"
|
||
|
|
.\" This software is provided by Joseph Koshy ``as is'' and
|
||
|
|
.\" any express or implied warranties, including, but not limited to, the
|
||
|
|
.\" implied warranties of merchantability and fitness for a particular purpose
|
||
|
|
.\" are disclaimed. in no event shall Joseph Koshy be liable
|
||
|
|
.\" for any direct, indirect, incidental, special, exemplary, or consequential
|
||
|
|
.\" damages (including, but not limited to, procurement of substitute goods
|
||
|
|
.\" or services; loss of use, data, or profits; or business interruption)
|
||
|
|
.\" however caused and on any theory of liability, whether in contract, strict
|
||
|
|
.\" liability, or tort (including negligence or otherwise) arising in any way
|
||
|
|
.\" out of the use of this software, even if advised of the possibility of
|
||
|
|
.\" such damage.
|
||
|
|
.\"
|
||
|
|
.\" $Id$
|
||
|
|
.\"
|
||
|
|
.Dd June 1, 2006
|
||
|
|
.Os
|
||
|
|
.Dt ELF_VERSION 3
|
||
|
|
.Sh NAME
|
||
|
|
.Nm elf_version
|
||
|
|
.Nd retrieve or set ELF library operating version
|
||
|
|
.Sh LIBRARY
|
||
|
|
.Lb libelf
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.In libelf.h
|
||
|
|
.Ft unsigned int
|
||
|
|
.Fn elf_version "unsigned int version"
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
The
|
||
|
|
.Fn elf_version
|
||
|
|
function is used to query the current operating version of the ELF
|
||
|
|
library, and to inform the ELF library about the application's desired
|
||
|
|
operating version.
|
||
|
|
.Pp
|
||
|
|
If the argument
|
||
|
|
.Ar version
|
||
|
|
is
|
||
|
|
.Dv EV_NONE ,
|
||
|
|
the
|
||
|
|
.Fn elf_version
|
||
|
|
function returns the currently configured operating version for the
|
||
|
|
ELF library.
|
||
|
|
.Pp
|
||
|
|
If the argument
|
||
|
|
.Ar version
|
||
|
|
is not
|
||
|
|
.Dv EV_NONE ,
|
||
|
|
and if argument
|
||
|
|
.Ar version
|
||
|
|
is supported by the ELF library, function
|
||
|
|
.Fn elf_version
|
||
|
|
sets the library's operating version to
|
||
|
|
.Ar version ,
|
||
|
|
and returns the previous value of the operating version.
|
||
|
|
If argument
|
||
|
|
.Ar version
|
||
|
|
cannot be supported, then the
|
||
|
|
.Fn elf_version
|
||
|
|
function returns
|
||
|
|
.Dv EV_NONE .
|
||
|
|
.Sh RETURN VALUES
|
||
|
|
The
|
||
|
|
.Fn elf_version
|
||
|
|
function returns the currently configured ELF library version, or
|
||
|
|
.Dv EV_NONE
|
||
|
|
if an unsupported version is requested.
|
||
|
|
.Sh EXAMPLES
|
||
|
|
An application program would inform the ELF library about its desired
|
||
|
|
operating version and check for an error using the following code
|
||
|
|
snippet:
|
||
|
|
.Bd -literal -offset indent
|
||
|
|
if (elf_version(EV_CURRENT) == EV_NONE)
|
||
|
|
err(EX_SOFTWARE, "ELF library too old");
|
||
|
|
.Ed
|
||
|
|
.Sh ERRORS
|
||
|
|
Function
|
||
|
|
.Fn elf_version
|
||
|
|
may fail with the following error:
|
||
|
|
.Bl -tag -width "[ELF_E_RESOURCE]"
|
||
|
|
.It Bq Er "ELF_E_VERSION"
|
||
|
|
An unsupported library version number was requested.
|
||
|
|
.El
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr elf 3 ,
|
||
|
|
.Xr gelf 3
|