.\" Copyright (c) 2006,2008 Joseph Koshy.  All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" This software is provided by Joseph Koshy ``as is'' and
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.\" 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)
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.\" $Id: elf_getident.3,v 1.1 2019/02/01 05:27:37 jsg Exp $
.\"
.Dd July 3, 2006
.Dt ELF_GETIDENT 3
.Os
.Sh NAME
.Nm elf_getident
.Nd return the initial bytes of a file
.Sh LIBRARY
.Lb libelf
.Sh SYNOPSIS
.In libelf.h
.Ft char *
.Fn elf_getident "Elf *elf" "size_t *sz"
.Sh DESCRIPTION
Function
.Fn elf_getident
returns a pointer to the initial bytes of the file for descriptor
.Ar elf .
.Pp
If argument
.Ar sz
is non-null, the size of the identification area returned is written
to the location pointed to by
.Ar sz .
This location is set to zero on errors.
.Sh RETURN VALUES
Function
.Fn elf_getident
will return a non-NULL pointer to the initial bytes of the file if
successful, or NULL if an error condition is detected.
.Sh ERRORS
Function
.Fn elf_getident
can fail with the following errors:
.Bl -tag -width "[ELF_E_RESOURCE]"
.It Bq Er ELF_E_ARGUMENT
A NULL value was passed in for argument
.Ar elf .
.It Bq Er ELF_E_SEQUENCE
ELF descriptor
.Ar elf
was opened for writing and function
.Fn elf_getident
was called before a call to
.Xr elf_update 3 .
.El
.Sh SEE ALSO
.Xr elf 3 ,
.Xr elf32_getehdr 3 ,
.Xr elf64_getehdr 3 ,
.Xr elf_getarhdr 3 ,
.Xr elf_getbase 3 ,
.Xr elf_getflags 3 ,
.Xr elf_kind 3 ,
.Xr elf_rawfile 3 ,
.Xr elf_update 3 ,
.Xr gelf 3 ,
.Xr gelf_getclass 3 ,
.Xr gelf_getehdr 3