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0381d422d9
ar: reuse existing ar unpacking code get_header_tar: handle autodetection for tiny .tar.gz files too unarchive.h: do not include CONFIGed out things function old new delta get_header_tar 1521 1534 +13 dpkg_deb_main 400 380 -20 ar_main 260 196 -64 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/2 up/down: 13/-84) Total: -71 bytes
346 lines
9.7 KiB
Plaintext
346 lines
9.7 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see scripts/kbuild/config-language.txt.
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#
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menu "Archival Utilities"
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config AR
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bool "ar"
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default n
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help
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ar is an archival utility program used to create, modify, and
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extract contents from archives. An archive is a single file holding
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a collection of other files in a structure that makes it possible to
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retrieve the original individual files (called archive members).
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The original files' contents, mode (permissions), timestamp, owner,
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and group are preserved in the archive, and can be restored on
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extraction.
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The stored filename is limited to 15 characters. (for more information
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see long filename support).
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ar has 60 bytes of overheads for every stored file.
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This implementation of ar can extract archives, it cannot create or
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modify them.
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On an x86 system, the ar applet adds about 1K.
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Unless you have a specific application which requires ar, you should
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probably say N here.
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config FEATURE_AR_LONG_FILENAMES
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bool "Support for long filenames (not need for debs)"
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default n
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depends on AR
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help
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By default the ar format can only store the first 15 characters of the
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filename, this option removes that limitation.
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It supports the GNU ar long filename method which moves multiple long
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filenames into a the data section of a new ar entry.
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config BUNZIP2
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bool "bunzip2"
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default n
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help
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bunzip2 is a compression utility using the Burrows-Wheeler block
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sorting text compression algorithm, and Huffman coding. Compression
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is generally considerably better than that achieved by more
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conventional LZ77/LZ78-based compressors, and approaches the
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performance of the PPM family of statistical compressors.
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Unless you have a specific application which requires bunzip2, you
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should probably say N here.
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config BZIP2
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bool "bzip2"
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default n
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help
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bzip2 is a compression utility using the Burrows-Wheeler block
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sorting text compression algorithm, and Huffman coding. Compression
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is generally considerably better than that achieved by more
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conventional LZ77/LZ78-based compressors, and approaches the
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performance of the PPM family of statistical compressors.
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Unless you have a specific application which requires bzip2, you
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should probably say N here.
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config CPIO
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bool "cpio"
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default n
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help
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cpio is an archival utility program used to create, modify, and extract
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contents from archives.
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cpio has 110 bytes of overheads for every stored file.
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This implementation of cpio can extract cpio archives created in the
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"newc" or "crc" format, it cannot create or modify them.
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Unless you have a specific application which requires cpio, you should
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probably say N here.
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config FEATURE_CPIO_O
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bool "Support for archive creation"
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default n
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depends on CPIO
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help
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This implementation of cpio can create cpio archives in the "newc"
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format only.
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config DPKG
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bool "dpkg"
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default n
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help
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dpkg is a medium-level tool to install, build, remove and manage
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Debian packages.
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This implementation of dpkg has a number of limitations,
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you should use the official dpkg if possible.
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config DPKG_DEB
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bool "dpkg_deb"
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default n
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help
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dpkg-deb packs, unpacks and provides information about Debian archives.
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This implementation of dpkg-deb cannot pack archives.
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Unless you have a specific application which requires dpkg-deb,
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say N here.
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config FEATURE_DPKG_DEB_EXTRACT_ONLY
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bool "Extract only (-x)"
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default n
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depends on DPKG_DEB
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help
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This reduces dpkg-deb to the equivalent of "ar -p <deb> data.tar.gz | tar -zx".
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However it saves space as none of the extra dpkg-deb, ar or tar options are
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needed, they are linked to internally.
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config GUNZIP
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bool "gunzip"
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default n
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help
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gunzip is used to decompress archives created by gzip.
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You can use the `-t' option to test the integrity of
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an archive, without decompressing it.
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config FEATURE_GUNZIP_UNCOMPRESS
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bool "Uncompress support"
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default n
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depends on GUNZIP
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help
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Enable if you want gunzip to have the ability to decompress
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archives created by the program compress (not much
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used anymore).
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config GZIP
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bool "gzip"
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default n
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help
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gzip is used to compress files.
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It's probably the most widely used UNIX compression program.
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config RPM2CPIO
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bool "rpm2cpio"
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default n
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help
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Converts an RPM file into a CPIO archive.
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config RPM
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bool "rpm"
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default n
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help
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Mini RPM applet - queries and extracts RPM packages.
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config FEATURE_RPM_BZ2
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bool "Enable handling of rpms with bzip2-compressed data inside"
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default n
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depends on RPM
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help
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Enable handling of rpms with bzip2-compressed data inside.
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config TAR
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bool "tar"
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default n
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help
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tar is an archiving program. It's commonly used with gzip to
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create compressed archives. It's probably the most widely used
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UNIX archive program.
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config FEATURE_TAR_CREATE
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bool "Enable archive creation"
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default y
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depends on TAR
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help
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If you enable this option you'll be able to create
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tar archives using the `-c' option.
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config FEATURE_TAR_GZIP
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bool "Enable -z option"
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default y
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depends on TAR
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help
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If you enable this option tar will be able to call gzip,
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when creating or extracting tar gziped archives.
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config FEATURE_TAR_BZIP2
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bool "Enable -j option to handle .tar.bz2 files"
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default n
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depends on TAR
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help
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If you enable this option you'll be able to extract
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archives compressed with bzip2.
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config FEATURE_TAR_LZMA
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bool "Enable -a option to handle .tar.lzma files"
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default n
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depends on TAR
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help
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If you enable this option you'll be able to extract
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archives compressed with lzma.
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config FEATURE_TAR_COMPRESS
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bool "Enable -Z option"
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default n
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depends on TAR
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help
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If you enable this option tar will be able to call uncompress,
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when extracting .tar.Z archives.
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config FEATURE_TAR_AUTODETECT
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bool "Let tar autodetect gz/bz2 compresses tarballs"
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default n
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depends on FEATURE_TAR_GZIP || FEATURE_TAR_BZIP2
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help
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With this option tar can automatically detect gzip/bzip2 compressed
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tarballs. Currently it works only on seekable streams.
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config FEATURE_TAR_FROM
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bool "Enable -X (exclude from) and -T (include from) options)"
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default n
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depends on TAR
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help
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If you enable this option you'll be able to specify
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a list of files to include or exclude from an archive.
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config FEATURE_TAR_OLDGNU_COMPATIBILITY
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bool "Support for old tar header format"
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default N
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depends on TAR
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help
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This option is required to unpack archives created in
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the old GNU format; help to kill this old format by
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repacking your ancient archives with the new format.
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config FEATURE_TAR_OLDSUN_COMPATIBILITY
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bool "Enable untarring of tarballs with checksums produced by buggy Sun tar"
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default N
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depends on TAR
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help
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This option is required to unpack archives created by some old
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version of Sun's tar (it was calculating checksum using signed arithmetic).
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It is said to be fixed in newer Sun tar, but "old" tarballs still exist.
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config FEATURE_TAR_GNU_EXTENSIONS
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bool "Support for GNU tar extensions (long filenames)"
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default y
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depends on TAR
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help
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With this option busybox supports GNU long filenames and
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linknames.
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config FEATURE_TAR_LONG_OPTIONS
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bool "Enable long options"
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default n
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depends on TAR && GETOPT_LONG
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help
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Enable use of long options, increases size by about 400 Bytes
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config FEATURE_TAR_UNAME_GNAME
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bool "Enable use of user and group names"
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default n
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depends on TAR
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help
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Enables use of user and group names in tar. This affects contents
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listings (-t) and preserving permissions when unpacking (-p).
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+200 bytes.
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config UNCOMPRESS
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bool "uncompress"
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default n
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help
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uncompress is used to decompress archives created by compress.
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Not much used anymore, replaced by gzip/gunzip.
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config UNLZMA
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bool "unlzma"
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default n
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help
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unlzma is a compression utility using the Lempel-Ziv-Markov chain
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compression algorithm, and range coding. Compression
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is generally considerably better than that achieved by the bzip2
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compressors.
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The BusyBox unlzma applet is limited to de-compression only.
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On an x86 system, this applet adds about 4K.
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Unless you have a specific application which requires unlzma, you
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should probably say N here.
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config FEATURE_LZMA_FAST
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bool "Optimize unlzma for speed"
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default n
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depends on UNLZMA
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help
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This option reduces decompression time by about 33% at the cost of
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a 2K bigger binary.
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config UNZIP
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bool "unzip"
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default n
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help
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unzip will list or extract files from a ZIP archive,
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commonly found on DOS/WIN systems. The default behavior
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(with no options) is to extract the archive into the
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current directory. Use the `-d' option to extract to a
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directory of your choice.
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comment "Common options for cpio and tar"
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depends on CPIO || TAR
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comment "Common options for dpkg and dpkg_deb"
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depends on DPKG || DPKG_DEB
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config FEATURE_DEB_TAR_GZ
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bool "gzip debian packages (normal)"
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default y if DPKG || DPKG_DEB
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depends on DPKG || DPKG_DEB
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help
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This is the default compression method inside the debian ar file.
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If you want compatibility with standard .deb's you should say yes here.
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config FEATURE_DEB_TAR_BZ2
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bool "bzip2 debian packages"
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default n
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depends on DPKG || DPKG_DEB
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help
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This allows dpkg and dpkg-deb to extract deb's that are compressed internally
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with bzip2 instead of gzip.
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You only want this if you are creating your own custom debian packages that
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use an internal control.tar.bz2 or data.tar.bz2.
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config FEATURE_DEB_TAR_LZMA
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bool "lzma debian packages"
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default n
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depends on DPKG || DPKG_DEB
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help
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This allows dpkg and dpkg-deb to extract deb's that are compressed
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internally with lzma instead of gzip.
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You only want this if you are creating your own custom debian
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packages that use an internal control.tar.lzma or data.tar.lzma.
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endmenu
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