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#
# For a description of the syntax of this configuration file,
# see scripts/kbuild/config-language.txt.
#
menu "Archival Utilities"
config FEATURE_SEAMLESS_LZMA
bool "Make tar, rpm, modprobe etc understand .lzma data"
default n
help
Make tar, rpm, modprobe etc understand .lzma data.
config FEATURE_SEAMLESS_BZ2
bool "Make tar, rpm, modprobe etc understand .bz2 data"
default n
help
Make tar, rpm, modprobe etc understand .bz2 data.
config FEATURE_SEAMLESS_GZ
bool "Make tar, rpm, modprobe etc understand .gz data"
default n
help
Make tar, rpm, modprobe etc understand .gz data.
config FEATURE_SEAMLESS_Z
bool "Make tar and gunzip understand .Z data"
default n
help
Make tar and gunzip understand .Z data.
config AR
bool "ar"
default n
help
ar is an archival utility program used to create, modify, and
extract contents from archives. An archive is a single file holding
a collection of other files in a structure that makes it possible to
retrieve the original individual files (called archive members).
The original files' contents, mode (permissions), timestamp, owner,
and group are preserved in the archive, and can be restored on
extraction.
The stored filename is limited to 15 characters. (for more information
see long filename support).
ar has 60 bytes of overheads for every stored file.
This implementation of ar can extract archives, it cannot create or
modify them.
On an x86 system, the ar applet adds about 1K.
Unless you have a specific application which requires ar, you should
probably say N here.
config FEATURE_AR_LONG_FILENAMES
bool "Support for long filenames (not needed for debs)"
default n
depends on AR
help
By default the ar format can only store the first 15 characters
of the filename, this option removes that limitation.
It supports the GNU ar long filename method which moves multiple long
filenames into a the data section of a new ar entry.
config BUNZIP2
bool "bunzip2"
default n
help
bunzip2 is a compression utility using the Burrows-Wheeler block
sorting text compression algorithm, and Huffman coding. Compression
is generally considerably better than that achieved by more
conventional LZ77/LZ78-based compressors, and approaches the
performance of the PPM family of statistical compressors.
Unless you have a specific application which requires bunzip2, you
should probably say N here.
config BZIP2
bool "bzip2"
default n
help
bzip2 is a compression utility using the Burrows-Wheeler block
sorting text compression algorithm, and Huffman coding. Compression
is generally considerably better than that achieved by more
conventional LZ77/LZ78-based compressors, and approaches the
performance of the PPM family of statistical compressors.
Unless you have a specific application which requires bzip2, you
should probably say N here.
config CPIO
bool "cpio"
default n
help
cpio is an archival utility program used to create, modify, and
extract contents from archives.
cpio has 110 bytes of overheads for every stored file.
This implementation of cpio can extract cpio archives created in the
"newc" or "crc" format, it cannot create or modify them.
Unless you have a specific application which requires cpio, you
should probably say N here.
config FEATURE_CPIO_O
bool "Support for archive creation"
default n
depends on CPIO
help
This implementation of cpio can create cpio archives in the "newc"
format only.
config FEATURE_CPIO_P
bool "Support for passthrough mode"
default n
depends on FEATURE_CPIO_O
help
Passthrough mode. Rarely used.
config DPKG
bool "dpkg"
default n
select FEATURE_SEAMLESS_GZ
help
dpkg is a medium-level tool to install, build, remove and manage
Debian packages.
This implementation of dpkg has a number of limitations,
you should use the official dpkg if possible.
config DPKG_DEB
bool "dpkg_deb"
default n
select FEATURE_SEAMLESS_GZ
help
dpkg-deb unpacks and provides information about Debian archives.
This implementation of dpkg-deb cannot pack archives.
Unless you have a specific application which requires dpkg-deb,
say N here.
config FEATURE_DPKG_DEB_EXTRACT_ONLY
bool "Extract only (-x)"
default n
depends on DPKG_DEB
help
This reduces dpkg-deb to the equivalent of
"ar -p <deb> data.tar.gz | tar -zx". However it saves space as none
of the extra dpkg-deb, ar or tar options are needed, they are linked
to internally.
config GUNZIP
bool "gunzip"
default n
help
gunzip is used to decompress archives created by gzip.
You can use the `-t' option to test the integrity of
an archive, without decompressing it.
config GZIP
bool "gzip"
default n
help
gzip is used to compress files.
It's probably the most widely used UNIX compression program.
config LZOP
bool "lzop"
default n
help
Lzop compression/decompresion.
config LZOP_COMPR_HIGH
bool "lzop complession levels 7,8,9 (not very useful)"
default n
depends on LZOP
help
High levels (7,8,9) of lzop compression. These levels
are actually slower than gzip at equivalent compression ratios
and take up 3.2K of code.
config RPM2CPIO
bool "rpm2cpio"
default n
help
Converts an RPM file into a CPIO archive.
config RPM
bool "rpm"
default n
help
Mini RPM applet - queries and extracts RPM packages.
config TAR
bool "tar"
default n
help
tar is an archiving program. It's commonly used with gzip to
create compressed archives. It's probably the most widely used
UNIX archive program.
if TAR
config FEATURE_TAR_CREATE
bool "Enable archive creation"
default y
depends on TAR
help
If you enable this option you'll be able to create
tar archives using the `-c' option.
config FEATURE_TAR_AUTODETECT
bool "Autodetect compressed tarballs"
default n
depends on FEATURE_SEAMLESS_Z || FEATURE_SEAMLESS_GZ || FEATURE_SEAMLESS_BZ2 || FEATURE_SEAMLESS_LZMA
help
With this option tar can automatically detect compressed
tarballs. Currently it works only on files (not pipes etc).
config FEATURE_TAR_FROM
bool "Enable -X (exclude from) and -T (include from) options)"
default n
depends on TAR
help
If you enable this option you'll be able to specify
a list of files to include or exclude from an archive.
config FEATURE_TAR_OLDGNU_COMPATIBILITY
bool "Support for old tar header format"
default N
depends on TAR
help
This option is required to unpack archives created in
the old GNU format; help to kill this old format by
repacking your ancient archives with the new format.
config FEATURE_TAR_OLDSUN_COMPATIBILITY
bool "Enable untarring of tarballs with checksums produced by buggy Sun tar"
default N
depends on TAR
help
This option is required to unpack archives created by some old
version of Sun's tar (it was calculating checksum using signed
arithmetic). It is said to be fixed in newer Sun tar, but "old"
tarballs still exist.
config FEATURE_TAR_GNU_EXTENSIONS
bool "Support for GNU tar extensions (long filenames)"
default y
depends on TAR
help
With this option busybox supports GNU long filenames and
linknames.
config FEATURE_TAR_LONG_OPTIONS
bool "Enable long options"
default n
depends on TAR && LONG_OPTS
help
Enable use of long options, increases size by about 400 Bytes
config FEATURE_TAR_UNAME_GNAME
bool "Enable use of user and group names"
default n
depends on TAR
help
Enables use of user and group names in tar. This affects contents
listings (-t) and preserving permissions when unpacking (-p).
+200 bytes.
endif #tar
config UNCOMPRESS
bool "uncompress"
default n
help
uncompress is used to decompress archives created by compress.
Not much used anymore, replaced by gzip/gunzip.
config UNLZMA
bool "unlzma"
default n
help
unlzma is a compression utility using the Lempel-Ziv-Markov chain
compression algorithm, and range coding. Compression
is generally considerably better than that achieved by the bzip2
compressors.
The BusyBox unlzma applet is limited to de-compression only.
On an x86 system, this applet adds about 4K.
Unless you have a specific application which requires unlzma, you
should probably say N here.
config FEATURE_LZMA_FAST
bool "Optimize unlzma for speed"
default n
depends on UNLZMA
help
This option reduces decompression time by about 33% at the cost of
a 2K bigger binary.
config UNZIP
bool "unzip"
default n
help
unzip will list or extract files from a ZIP archive,
commonly found on DOS/WIN systems. The default behavior
(with no options) is to extract the archive into the
current directory. Use the `-d' option to extract to a
directory of your choice.
endmenu
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