2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
6 menu "Archival Utilities"
8 config FEATURE_SEAMLESS_LZMA
9 bool "Make tar, rpm, modprobe etc understand .lzma data"
12 Make tar, rpm, modprobe etc understand .lzma data.
14 config FEATURE_SEAMLESS_BZ2
15 bool "Make tar, rpm, modprobe etc understand .bz2 data"
18 Make tar, rpm, modprobe etc understand .bz2 data.
20 config FEATURE_SEAMLESS_GZ
21 bool "Make tar, rpm, modprobe etc understand .gz data"
24 Make tar, rpm, modprobe etc understand .gz data.
26 config FEATURE_SEAMLESS_Z
27 bool "Make tar and gunzip understand .Z data"
30 Make tar and gunzip understand .Z data.
36 ar is an archival utility program used to create, modify, and
37 extract contents from archives. An archive is a single file holding
38 a collection of other files in a structure that makes it possible to
39 retrieve the original individual files (called archive members).
40 The original files' contents, mode (permissions), timestamp, owner,
41 and group are preserved in the archive, and can be restored on
44 The stored filename is limited to 15 characters. (for more information
45 see long filename support).
46 ar has 60 bytes of overheads for every stored file.
48 This implementation of ar can extract archives, it cannot create or
50 On an x86 system, the ar applet adds about 1K.
52 Unless you have a specific application which requires ar, you should
55 config FEATURE_AR_LONG_FILENAMES
56 bool "Support for long filenames (not need for debs)"
60 By default the ar format can only store the first 15 characters of
61 the filename, this option removes that limitation.
62 It supports the GNU ar long filename method which moves multiple long
63 filenames into a the data section of a new ar entry.
69 bunzip2 is a compression utility using the Burrows-Wheeler block
70 sorting text compression algorithm, and Huffman coding. Compression
71 is generally considerably better than that achieved by more
72 conventional LZ77/LZ78-based compressors, and approaches the
73 performance of the PPM family of statistical compressors.
75 Unless you have a specific application which requires bunzip2, you
76 should probably say N here.
82 bzip2 is a compression utility using the Burrows-Wheeler block
83 sorting text compression algorithm, and Huffman coding. Compression
84 is generally considerably better than that achieved by more
85 conventional LZ77/LZ78-based compressors, and approaches the
86 performance of the PPM family of statistical compressors.
88 Unless you have a specific application which requires bzip2, you
89 should probably say N here.
95 cpio is an archival utility program used to create, modify, and
96 extract contents from archives.
97 cpio has 110 bytes of overheads for every stored file.
99 This implementation of cpio can extract cpio archives created in the
100 "newc" or "crc" format, it cannot create or modify them.
102 Unless you have a specific application which requires cpio, you
103 should probably say N here.
105 config FEATURE_CPIO_O
106 bool "Support for archive creation"
110 This implementation of cpio can create cpio archives in the "newc"
116 select FEATURE_SEAMLESS_GZ
118 dpkg is a medium-level tool to install, build, remove and manage
121 This implementation of dpkg has a number of limitations,
122 you should use the official dpkg if possible.
127 select FEATURE_SEAMLESS_GZ
129 dpkg-deb unpacks and provides information about Debian archives.
131 This implementation of dpkg-deb cannot pack archives.
133 Unless you have a specific application which requires dpkg-deb,
136 config FEATURE_DPKG_DEB_EXTRACT_ONLY
137 bool "Extract only (-x)"
141 This reduces dpkg-deb to the equivalent of
142 "ar -p <deb> data.tar.gz | tar -zx". However it saves space as none
143 of the extra dpkg-deb, ar or tar options are needed, they are linked
150 gunzip is used to decompress archives created by gzip.
151 You can use the `-t' option to test the integrity of
152 an archive, without decompressing it.
158 gzip is used to compress files.
159 It's probably the most widely used UNIX compression program.
165 Converts an RPM file into a CPIO archive.
171 Mini RPM applet - queries and extracts RPM packages.
177 tar is an archiving program. It's commonly used with gzip to
178 create compressed archives. It's probably the most widely used
179 UNIX archive program.
183 config FEATURE_TAR_CREATE
184 bool "Enable archive creation"
188 If you enable this option you'll be able to create
189 tar archives using the `-c' option.
191 config FEATURE_TAR_AUTODETECT
192 bool "Autodetect gz/bz2 compressed tarballs"
194 depends on FEATURE_SEAMLESS_Z || FEATURE_SEAMLESS_GZ || FEATURE_SEAMLESS_BZ2 || FEATURE_SEAMLESS_LZMA
196 With this option tar can automatically detect gzip/bzip2 compressed
197 tarballs. Currently it works only on files (not pipes etc).
199 config FEATURE_TAR_FROM
200 bool "Enable -X (exclude from) and -T (include from) options)"
204 If you enable this option you'll be able to specify
205 a list of files to include or exclude from an archive.
207 config FEATURE_TAR_OLDGNU_COMPATIBILITY
208 bool "Support for old tar header format"
212 This option is required to unpack archives created in
213 the old GNU format; help to kill this old format by
214 repacking your ancient archives with the new format.
216 config FEATURE_TAR_OLDSUN_COMPATIBILITY
217 bool "Enable untarring of tarballs with checksums produced by buggy Sun tar"
221 This option is required to unpack archives created by some old
222 version of Sun's tar (it was calculating checksum using signed
223 arithmetic). It is said to be fixed in newer Sun tar, but "old"
224 tarballs still exist.
226 config FEATURE_TAR_GNU_EXTENSIONS
227 bool "Support for GNU tar extensions (long filenames)"
231 With this option busybox supports GNU long filenames and
234 config FEATURE_TAR_LONG_OPTIONS
235 bool "Enable long options"
237 depends on TAR && GETOPT_LONG
239 Enable use of long options, increases size by about 400 Bytes
241 config FEATURE_TAR_UNAME_GNAME
242 bool "Enable use of user and group names"
246 Enables use of user and group names in tar. This affects contents
247 listings (-t) and preserving permissions when unpacking (-p).
256 uncompress is used to decompress archives created by compress.
257 Not much used anymore, replaced by gzip/gunzip.
263 unlzma is a compression utility using the Lempel-Ziv-Markov chain
264 compression algorithm, and range coding. Compression
265 is generally considerably better than that achieved by the bzip2
268 The BusyBox unlzma applet is limited to de-compression only.
269 On an x86 system, this applet adds about 4K.
271 Unless you have a specific application which requires unlzma, you
272 should probably say N here.
274 config FEATURE_LZMA_FAST
275 bool "Optimize unlzma for speed"
279 This option reduces decompression time by about 33% at the cost of
286 unzip will list or extract files from a ZIP archive,
287 commonly found on DOS/WIN systems. The default behavior
288 (with no options) is to extract the archive into the
289 current directory. Use the `-d' option to extract to a
290 directory of your choice.