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 XXX bytes.
+ 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 CONFIG_FEATURE_AR_LONG_FILENAMES
- bool " Enable support for long filenames (not need for debs)"
+ bool "Enable support for long filenames (not need for debs)"
default n
depends on CONFIG_AR
help
bool "bunzip2"
default n
help
- bunzip2 is an compression utility using the Burrows-Wheeler block
+ 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.
-
+ performance of the PPM family of statistical compressors.
+
The BusyBox bunzip2 applet is limited to de-compression only.
- On an x86 system, this applet adds about XXX bytes.
-
+ On an x86 system, this applet adds about 11K.
+
Unless you have a specific application which requires bunzip2, you
should probably say N here.
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.
+ "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.
default n
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.
default n
help
dpkg-deb packs, 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, you should
probably say N here.
config CONFIG_FEATURE_DPKG_DEB_EXTRACT_ONLY
- bool " extract only (-x)"
+ bool "extract only (-x)"
default n
depends on CONFIG_DPKG_DEB
help
- This reduced 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
+ 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 CONFIG_FEATURE_DEB_TAR_GZ
- bool " gzip debian packages (normal)"
- default y if CONFIG_DPKG || CONFIG_DPKG_DEB
- depends on CONFIG_DPKG || CONFIG_DPKG_DEB
- help
- This is the default compression method inside the debian ar file.
-
- If you want compatability with standard .deb's you should say yes here.
-
-config CONFIG_FEATURE_DEB_TAR_BZ2
- bool " bzip2 debian packages"
- default n
- depends on CONFIG_DPKG || CONFIG_DPKG_DEB
- help
- This allows dpkg and dpkg-deb to extract deb's that are compressed internally
- with bzip2 instead of gzip.
-
- You only want this is your are creating your own custom debian packages that
- use an internal control.tar.bz2 or data.tar.bz2.
-
config CONFIG_GUNZIP
bool "gunzip"
default n
an archive, without decompressing it.
config CONFIG_FEATURE_GUNZIP_UNCOMPRESS
- bool " Uncompress support"
+ bool "Uncompress support"
default n
depends on CONFIG_GUNZIP
help
- If you want gunzip to have the ability to decompress
+ Enable if you want gunzip to have the ability to decompress
archives created by the program compress (not much
used anymore).
default n
help
gzip is used to compress files.
- It's probably the most used UNIX compression program.
+ It's probably the most widely used UNIX compression program.
config CONFIG_RPM2CPIO
bool "rpm2cpio"
bool "rpm"
default n
help
- Mini RPM applet - querys and extracts
+ Mini RPM applet - queries and extracts
config 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 used
+ create compressed archives. It's probably the most widely used
UNIX archive program.
config CONFIG_FEATURE_TAR_CREATE
- bool " Enable archive creation"
+ bool "Enable archive creation"
default y
depends on CONFIG_TAR
help
tar archives using the `-c' option.
config CONFIG_FEATURE_TAR_BZIP2
- bool " Enable -j option to handle .tar.bz2 files"
+ bool "Enable -j option to handle .tar.bz2 files"
default n
depends on CONFIG_TAR
help
If you enable this option you'll be able to extract
archives compressed with bzip2.
-config CONFIG_FEATURE_TAR_EXCLUDE
- bool " Enable -X and --exclude options (exclude files)"
+config CONFIG_FEATURE_TAR_LZMA
+ bool "Enable -a option to handle .tar.lzma files"
+ default n
+ depends on CONFIG_TAR
+ help
+ If you enable this option you'll be able to extract
+ archives compressed with lzma.
+
+config CONFIG_FEATURE_TAR_FROM
+ bool "Enable -X (exclude from) and -T (include from) options)"
default n
depends on CONFIG_TAR
help
If you enable this option you'll be able to specify
- a list of files to exclude from an archive.
+ a list of files to include or exclude from an archive.
config CONFIG_FEATURE_TAR_GZIP
- bool " Enable -z option"
+ bool "Enable -z option"
default y
depends on CONFIG_TAR
help
If you enable this option tar will be able to call gzip,
when creating or extracting tar gziped archives.
-config CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
- bool " Enable support for old tar header format"
+config CONFIG_FEATURE_TAR_COMPRESS
+ bool "Enable -Z option"
+ default n
+ depends on CONFIG_TAR
+ help
+ If you enable this option tar will be able to call uncompress,
+ when extracting .tar.Z archives.
+
+config CONFIG_FEATURE_TAR_OLDGNU_COMPATIBILITY
+ bool "Enable support for old tar header format"
default N
depends on CONFIG_TAR
help
- This option is required to unpack archives created with
- in the old GNU format, help to kill this old format by
+ 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 CONFIG_FEATURE_TAR_GNU_EXTENSIONS
- bool " Enable support for some GNU tar extensions"
+ bool "Enable support for some GNU tar extensions"
default y
depends on CONFIG_TAR
help
- With this option busybox supports GNU long filenames and
+ With this option busybox supports GNU long filenames and
linknames.
-config CONFIG_FEATURE_UNARCHIVE_TAPE
- bool " Enable tape drive support"
+config CONFIG_FEATURE_TAR_LONG_OPTIONS
+ bool "Enable long options"
default n
- depends on CONFIG_TAR || CONFIG_CPIO
+ depends on CONFIG_TAR && CONFIG_GETOPT_LONG
help
- I dont think this is needed anymore.
+ Enable use of long options, increases size by about 400 Bytes
config CONFIG_UNCOMPRESS
bool "uncompress"
uncompress is used to decompress archives created by compress.
Not much used anymore, replaced by gzip/gunzip.
+config 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 CONFIG_FEATURE_LZMA_FAST
+ bool "Optimze unlzma for speed"
+ default n
+ depends on CONFIG_UNLZMA
+ help
+ This option reduce decompression time by about 33% at the cost of
+ a 2K bigger binary.
+
config CONFIG_UNZIP
bool "unzip"
default n
current directory. Use the `-d' option to extract to a
directory of your choice.
+comment "Common options for cpio and tar"
+ depends on CONFIG_CPIO || CONFIG_TAR
+
+config CONFIG_FEATURE_UNARCHIVE_TAPE
+ bool "Enable tape drive support"
+ default n
+ depends on CONFIG_CPIO || CONFIG_TAR
+ help
+ I don't think this is needed anymore.
+
+comment "Common options for dpkg and dpkg_deb"
+ depends on CONFIG_DPKG || CONFIG_DPKG_DEB
+
+config CONFIG_FEATURE_DEB_TAR_GZ
+ bool "gzip debian packages (normal)"
+ default y if CONFIG_DPKG || CONFIG_DPKG_DEB
+ depends on CONFIG_DPKG || CONFIG_DPKG_DEB
+ help
+ This is the default compression method inside the debian ar file.
+
+ If you want compatibility with standard .deb's you should say yes here.
+
+config CONFIG_FEATURE_DEB_TAR_BZ2
+ bool "bzip2 debian packages"
+ default n
+ depends on CONFIG_DPKG || CONFIG_DPKG_DEB
+ help
+ This allows dpkg and dpkg-deb to extract deb's that are compressed internally
+ with bzip2 instead of gzip.
+
+ You only want this if you are creating your own custom debian packages that
+ use an internal control.tar.bz2 or data.tar.bz2.
+
+config CONFIG_FEATURE_DEB_TAR_LZMA
+ bool "lzma debian packages"
+ default n
+ depends on CONFIG_DPKG || CONFIG_DPKG_DEB
+ help
+ This allows dpkg and dpkg-deb to extract deb's that are compressed
+ internally with lzma instead of gzip.
+
+ You only want this if you are creating your own custom debian
+ packages that use an internal control.tar.lzma or data.tar.lzma.
+
endmenu
projects / oweals / busybox.git / blobdiff