# # For a description of the syntax of this configuration file, # see scripts/kbuild/config-language.txt. # menu "Archival Utilities" INSERT config FEATURE_SEAMLESS_XZ bool "Make tar, rpm, modprobe etc understand .xz data" default y help Make tar, rpm, modprobe etc understand .xz data. config FEATURE_SEAMLESS_LZMA bool "Make tar, rpm, modprobe etc understand .lzma data" default y help Make tar, rpm, modprobe etc understand .lzma data. config FEATURE_SEAMLESS_BZ2 bool "Make tar, rpm, modprobe etc understand .bz2 data" default y help Make tar, rpm, modprobe etc understand .bz2 data. config FEATURE_SEAMLESS_GZ bool "Make tar, rpm, modprobe etc understand .gz data" default y help Make tar, rpm, modprobe etc understand .gz data. config FEATURE_SEAMLESS_Z bool "tar, rpm, modprobe etc understand .Z data" default n help Make tar, rpm, modprobe etc understand .Z data. config AR bool "ar" default n # needs to be improved to be able to replace binutils ar 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 y 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 FEATURE_AR_CREATE bool "Support archive creation" default y depends on AR help This enables archive creation (-c and -r) with busybox ar. config BUNZIP2 bool "bunzip2" default y 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 y 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 y 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 y 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 y 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 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 y 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 y help gzip is used to compress files. It's probably the most widely used UNIX compression program. config FEATURE_GZIP_LONG_OPTIONS bool "Enable long options" default y depends on GZIP && LONG_OPTS help Enable use of long options, increases size by about 106 Bytes config GZIP_FAST int "Trade memory for gzip speed (0:small,slow - 2:fast,big)" default 0 range 0 2 depends on GZIP help Enable big memory options for gzip. 0: small buffers, small hash-tables 1: larger buffers, larger hash-tables 2: larger buffers, largest hash-tables Larger models may give slightly better compression config LZOP bool "lzop" default y help Lzop compression/decompresion. config LZOP_COMPR_HIGH bool "lzop compression 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 y help Converts a RPM file into a CPIO archive. config RPM bool "rpm" default y help Mini RPM applet - queries and extracts RPM packages. config TAR bool "tar" default y 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. 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 y depends on TAR && (FEATURE_SEAMLESS_Z || FEATURE_SEAMLESS_GZ || FEATURE_SEAMLESS_BZ2 || FEATURE_SEAMLESS_LZMA || FEATURE_SEAMLESS_XZ) 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 y 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 y depends on TAR || DPKG 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 y depends on TAR || DPKG 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 || DPKG help With this option busybox supports GNU long filenames and linknames. config FEATURE_TAR_LONG_OPTIONS bool "Enable long options" default y depends on TAR && LONG_OPTS help Enable use of long options, increases size by about 400 Bytes config FEATURE_TAR_TO_COMMAND bool "Support for writing to an external program" default y depends on TAR && FEATURE_TAR_LONG_OPTIONS help If you enable this option you'll be able to instruct tar to send the contents of each extracted file to the standard input of an external program. config FEATURE_TAR_UNAME_GNAME bool "Enable use of user and group names" default y 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. config FEATURE_TAR_NOPRESERVE_TIME bool "Enable -m (do not preserve time) option" default y depends on TAR help With this option busybox supports GNU tar -m (do not preserve time) option. config FEATURE_TAR_SELINUX bool "Support for extracting SELinux labels" default n depends on TAR && SELINUX help With this option busybox supports restoring SELinux labels when extracting files from tar archives. 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 y 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 decompression only. On an x86 system, this applet adds about 4K. config FEATURE_LZMA_FAST bool "Optimize unlzma for speed" default n depends on UNLZMA help This option reduces decompression time by about 25% at the cost of a 1K bigger binary. config LZMA bool "Provide lzma alias which supports only unpacking" default y depends on UNLZMA help Enable this option if you want commands like "lzma -d" to work. IOW: you'll get lzma applet, but it will always require -d option. config UNXZ bool "unxz" default y help unxz is a unlzma successor. config XZ bool "Provide xz alias which supports only unpacking" default y depends on UNXZ help Enable this option if you want commands like "xz -d" to work. IOW: you'll get xz applet, but it will always require -d option. config UNZIP bool "unzip" default y 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