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.\" Copyright (c) 2006 Joseph Koshy.  All rights reserved.
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.\" $FreeBSD: release/9.1.0/lib/libelf/elf_getident.3 206622 2010-04-14 19:08:06Z uqs $
.\"
.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