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.\" 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: elf_strptr.3 1081 2010-08-14 02:23:48Z jkoshy $
.\"
.Dd December 16, 2006
.Os
.Dt ELF_STRPTR 3
.Sh NAME
.Nm elf_strptr
.Nd retrieve a string pointer in a string table
.Sh LIBRARY
.Lb libelf
.Sh SYNOPSIS
.In libelf.h
.Ft "char *"
.Fn elf_strptr "Elf *elf" "size_t scndx" "size_t stroffset"
.Sh DESCRIPTION
Function
.Fn elf_strptr
allows an application to convert a string table offset to a string
pointer, correctly translating the offset in the presence
of multiple
.Vt Elf_Data
descriptors covering the contents of the section.
.Pp
Argument
.Ar elf
is a descriptor for an ELF object.
Argument
.Ar scndx
is the section index for an ELF string table.
Argument
.Ar stroffset
is the index of the desired string in the string
table.
.Sh RETURN VALUES
Function
.Fn elf_strptr
returns a valid pointer on success or NULL in case an error was
encountered.
.Sh ERRORS
.Bl -tag -width "[ELF_E_RESOURCE]"
.It Bq Er ELF_E_ARGUMENT
Argument
.Ar elf
was NULL
.It Bq Er ELF_E_ARGUMENT
Argument
.Ar elf
was not a descriptor for an ELF object.
.It Bq Er ELF_E_ARGUMENT
Argument
.Ar scndx
was not the section index for a string table.
.It Bq Er ELF_E_ARGUMENT
Argument
.Ar stroffset
exceeded the size of the string table.
.It Bq Er ELF_E_ARGUMENT
Argument
.Ar stroffset
index an unallocated region of the string table.
.It Bq Er ELF_E_DATA
Offset
.Ar stroffset
indexed a region that was not covered by any Elf_Data
descriptor.
.It Bq Er ELF_E_DATA
An erroneous
.Vt Elf_Data
descriptor was part of the section specified by argument
.Ar scndx .
.It Bq Er ELF_E_HEADER
ELF descriptor
.Ar elf
contained an invalid section header.
.It Bq Er ELF_E_RESOURCE
An out of memory condition was detected.
.It Bq Er ELF_E_SECTION
Section
.Ar scndx
contained a malformed section header.
.It Bq Er ELF_E_SECTION
The ELF descriptor in argument
.Ar elf
did not adhere to the conventions used for extended numbering.
.El
.Sh SEE ALSO
.Xr elf 3 ,
.Xr elf32_getshdr 3 ,
.Xr elf64_getshdr 3 ,
.Xr elf_getdata 3 ,
.Xr elf_rawdata 3 ,
.Xr gelf 3 ,
.Xr gelf_getshdr 3
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