2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
6 menu "Archival Utilities"
12 ar is an archival utility program used to create, modify, and
13 extract contents from archives. An archive is a single file holding
14 a collection of other files in a structure that makes it possible to
15 retrieve the original individual files (called archive members).
16 The original files' contents, mode (permissions), timestamp, owner,
17 and group are preserved in the archive, and can be restored on
20 The stored filename is limited to 15 characters. (for more information
21 see long filename support).
22 ar has 60 bytes of overheads for every stored file.
24 This implementation of ar can extract archives, it cannot create or
26 On an x86 system, the ar applet adds about 1K.
28 Unless you have a specific application which requires ar, you should
31 config CONFIG_FEATURE_AR_LONG_FILENAMES
32 bool " Enable support for long filenames (not need for debs)"
36 By default the ar format can only store the first 15 characters of the
37 filename, this option removes that limitation.
38 It supports the GNU ar long filename method which moves multiple long
39 filenames into a the data section of a new ar entry.
45 bunzip2 is an compression utility using the Burrows-Wheeler block
46 sorting text compression algorithm, and Huffman coding. Compression
47 is generally considerably better than that achieved by more
48 conventional LZ77/LZ78-based compressors, and approaches the
49 performance of the PPM family of statistical compressors.
51 The BusyBox bunzip2 applet is limited to de-compression only.
52 On an x86 system, this applet adds about 11K.
54 Unless you have a specific application which requires bunzip2, you
55 should probably say N here.
61 cpio is an archival utility program used to create, modify, and extract
62 contents from archives.
63 cpio has 110 bytes of overheads for every stored file.
65 This implementation of cpio can extract cpio archives created in the
66 "newc" or "crc" format, it cannot create or modify them.
68 Unless you have a specific application which requires cpio, you should
75 dpkg is a medium-level tool to install, build, remove and manage Debian packages.
77 This implementation of dpkg has a number of limitations, you should use the
78 official dpkg if possible.
80 config CONFIG_DPKG_DEB
84 dpkg-deb packs, unpacks and provides information about Debian archives.
86 This implementation of dpkg-deb cannot pack archives.
88 Unless you have a specific application which requires dpkg-deb, you should
91 config CONFIG_FEATURE_DPKG_DEB_EXTRACT_ONLY
92 bool " extract only (-x)"
94 depends on CONFIG_DPKG_DEB
96 This reduced dpkg-deb to the equivalent of "ar -p <deb> data.tar.gz | tar -zx".
97 However it saves space as none of the extra dpkg-deb, ar or tar options are
98 needed, they are linked to internally.
100 config CONFIG_FEATURE_DEB_TAR_GZ
101 bool " gzip debian packages (normal)"
102 default y if CONFIG_DPKG || CONFIG_DPKG_DEB
103 depends on CONFIG_DPKG || CONFIG_DPKG_DEB
105 This is the default compression method inside the debian ar file.
107 If you want compatability with standard .deb's you should say yes here.
109 config CONFIG_FEATURE_DEB_TAR_BZ2
110 bool " bzip2 debian packages"
112 depends on CONFIG_DPKG || CONFIG_DPKG_DEB
114 This allows dpkg and dpkg-deb to extract deb's that are compressed internally
115 with bzip2 instead of gzip.
117 You only want this is your are creating your own custom debian packages that
118 use an internal control.tar.bz2 or data.tar.bz2.
124 gunzip is used to decompress archives created by gzip.
125 You can use the `-t' option to test the integrity of
126 an archive, without decompressing it.
128 config CONFIG_FEATURE_GUNZIP_UNCOMPRESS
129 bool " Uncompress support"
131 depends on CONFIG_GUNZIP
133 If you want gunzip to have the ability to decompress
134 archives created by the program compress (not much
141 gzip is used to compress files.
142 It's probably the most used UNIX compression program.
144 config CONFIG_RPM2CPIO
148 Converts an RPM file into a CPIO archive.
154 Mini RPM applet - querys and extracts
160 tar is an archiving program. It's commonly used with gzip to
161 create compressed archives. It's probably the most used
162 UNIX archive program.
164 config CONFIG_FEATURE_TAR_CREATE
165 bool " Enable archive creation"
167 depends on CONFIG_TAR
169 If you enable this option you'll be able to create
170 tar archives using the `-c' option.
172 config CONFIG_FEATURE_TAR_BZIP2
173 bool " Enable -j option to handle .tar.bz2 files"
175 depends on CONFIG_TAR
177 If you enable this option you'll be able to extract
178 archives compressed with bzip2.
180 config CONFIG_FEATURE_TAR_EXCLUDE
181 bool " Enable -X and --exclude options (exclude files)"
183 depends on CONFIG_TAR
185 If you enable this option you'll be able to specify
186 a list of files to exclude from an archive.
188 config CONFIG_FEATURE_TAR_GZIP
189 bool " Enable -z option"
191 depends on CONFIG_TAR
193 If you enable this option tar will be able to call gzip,
194 when creating or extracting tar gziped archives.
196 config CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
197 bool " Enable support for old tar header format"
199 depends on CONFIG_TAR
201 This option is required to unpack archives created with
202 in the old GNU format, help to kill this old format by
203 repacking your ancient archives with the new format.
205 config CONFIG_FEATURE_TAR_GNU_EXTENSIONS
206 bool " Enable support for some GNU tar extensions"
208 depends on CONFIG_TAR
210 With this option busybox supports GNU long filenames and
213 config CONFIG_FEATURE_UNARCHIVE_TAPE
214 bool " Enable tape drive support"
216 depends on CONFIG_TAR || CONFIG_CPIO
218 I dont think this is needed anymore.
220 config CONFIG_UNCOMPRESS
224 uncompress is used to decompress archives created by compress.
225 Not much used anymore, replaced by gzip/gunzip.
231 unzip will list or extract files from a ZIP archive,
232 commonly found on DOS/WIN systems. The default behavior
233 (with no options) is to extract the archive into the
234 current directory. Use the `-d' option to extract to a
235 directory of your choice.