minix/external/bsd/libelf/dist/elf_cntl.3
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

113 lines
3.2 KiB
Groff

.\" $NetBSD: elf_cntl.3,v 1.1.1.1 2009/12/19 05:43:39 thorpej Exp $
.\"
.\" Copyright (c) 2006 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.
.\"
.\" $FreeBSD: src/lib/libelf/elf_cntl.3,v 1.2.10.1.2.1 2009/10/25 01:10:29 kensmith Exp $
.\"
.Dd August 9, 2006
.Os
.Dt ELF_CNTL 3
.Sh NAME
.Nm elf_cntl
.Nd control an elf file descriptor
.Sh LIBRARY
.Lb libelf
.Sh SYNOPSIS
.In libelf.h
.Ft int
.Fn elf_cntl "Elf *elf" "Elf_Cmd cmd"
.Sh DESCRIPTION
Function
.Fn elf_cntl
controls the ELF library's subsequent use of the file descriptor
used to create ELF descriptor
.Ar elf .
.Pp
Argument
.Ar cmd
informs the library of the action to be taken:
.Bl -tag -width "ELF_C_FDDONE"
.It Dv ELF_C_FDDONE
This value instructs the ELF library not to perform any further
I/O on the file descriptor associated with argument
.Ar elf .
For ELF descriptors opened with mode
.Ar ELF_C_WRITE
or
.Ar ELF_C_RDWR
subsequent
.Fn elf_update
operations on the descriptor will fail.
.It Dv ELF_C_FDREAD
This value instructs the ELF library to read in all necessary
data associated with ELF descriptor
.Ar elf
into memory so that the underlying file descriptor can be
safely closed with command
.Dv ELF_C_FDDONE .
.El
.Pp
Argument
.Ar elf
must be an ELF descriptor associated with a file system object
(e.g., an
.Xr ar 1
archive, an ELF file, or other data file).
.Sh IMPLEMENTATION NOTES
Due to use of
.Xr mmap 2
internally, this function is a no-op for for ELF objects opened in
.Dv ELF_C_READ
mode.
.Sh RETURN VALUES
Function
.Fn elf_cntl
returns 0 on success, or -1 if an error was detected.
.Sh ERRORS
.Bl -tag -width "[ELF_E_RESOURCE]"
.It Bq Er ELF_E_ARCHIVE
Argument
.Ar elf
is a descriptor for an archive member.
.It Bq Er ELF_E_ARGUMENT
Argument
.Ar elf
was NULL.
.It Bq Er ELF_E_ARGUMENT
Argument
.Ar cmd
was not recognized.
.It Bq Er ELF_E_MODE
An
.Dv ELF_C_FDREAD
operation was requested on an ELF descriptor opened
for writing.
.El
.Sh SEE ALSO
.Xr elf 3 ,
.Xr elf_begin 3 ,
.Xr elf_end 3 ,
.Xr elf_next 3 ,
.Xr elf_update 3 ,
.Xr gelf 3