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.\" $Id: elf_strptr.3,v 1.1 2019/02/01 05:27:37 jsg Exp $
.\"
.Dd December 16, 2006
.Dt ELF_STRPTR 3
.Os
.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