1 Please see the LICENSE file for copyright information.
3 BusyBox combines tiny versions of many common UNIX utilities into a single
4 small executable. It provides minimalist replacements for most of the utilities
5 you usually find in fileutils, shellutils, findutils, textutils, grep, gzip,
6 tar, etc. BusyBox provides a fairly complete POSIX environment for any small or
7 embedded system. The utilities in BusyBox generally have fewer options than
8 their full featured GNU cousins; however, the options that are included provide
9 the expected functionality and behave very much like their GNU counterparts.
11 BusyBox has been written with size-optimization and limited resources in mind.
12 It is also extremely modular so you can easily include or exclude commands (or
13 features) at compile time. This makes it easy to customize your embedded
14 systems. To create a working system, just add /dev, a shell, and a kernel. For
15 a really minimal system, you can even use the busybox shell (not Bourne
16 compatible, but very small and quite usable) and the busybox vi editor.
18 BusyBox was originally written to support the Debian Rescue/Install disks, but
19 it also makes an excellent environment for any small or embedded system.
21 As of version 0.20 there is now a version number. : ) Also as of version 0.20,
22 BusyBox is now modularized to easily allow you to build only the components you
23 need, thereby reducing binary size. To turn off unwanted BusyBox components,
24 simply edit the file "Config.h" and comment out the components you do not need
25 using C++ style (//) comments.
27 After the build is complete, a busybox.links file is generated. This is
28 used by 'make install' to create symlinks to the busybox binary for all
29 compiled in functions. By default, 'make install' will place the symlink
30 forest into `pwd`/_install unless you have defined the PREFIX environment
31 variable (i.e., 'make PREFIX=/tmp/foo install')
35 Supported architectures:
37 Busybox in general will build on any architecture supported by gcc. It has
38 a few specialized features added for __sparc__ and __alpha__. insmod
39 functionality is currently limited to x86, ARM, SH3/4, powerpc, m68k,
44 glibc-2.0.x, glibc-2.1.x, Linux-libc5, uClibc. People are looking at
45 newlib and diet-libc, but consider them unsupported, untested, or worse.
49 Full functionality requires Linux 2.0.x, 2.2.x, or 2.4.x. A large fraction
50 of the code should run on just about anything.
56 When you find you need help, you can check out the BusyBox mailing list
57 archives at http://opensource.lineo.com/lists/busybox/ or even join
58 the mailing list if you are interested.
64 If you find bugs, please submit a bug report. Full instructions on how to
65 report a bug are found at http://bugs.lineo.com/Reporting.html.
67 For the impatient: To submit a bug, simply send an email describing the problem
68 to submit@bugs.lineo.com. Bug reports should look something like this:
70 To: submit@bugs.lineo.com
71 From: diligent@testing.linux.org
72 Subject: /bin/true doesn't work
77 When I invoke '/bin/true' it doesn't work. I expected it to return
78 a "0" but it returned a "1" instead. Here is the transcript:
81 With GNU /bin/true, I get the following output:
84 I am using Debian 2.2r2, kernel version 2.2.18, and the latest
85 uClibc from CVS. Thanks for the wonderful program!
88 Note the careful description and use of examples showing not only what BusyBox
89 does, but also a counter example showing what an equivalent GNU app does. Bug
90 reports lacking such detail may take a _long_ time to be fixed... Thanks for
97 Source for the latest released version can always be downloaded from
98 ftp://ftp.lineo.com/pub/busybox.
104 BusyBox now has its own publicly browsable CVS tree at:
105 http://opensource.lineo.com/cgi-bin/cvsweb/busybox/
107 Anonymous CVS access is available. For instructions, check out:
108 http://opensource.lineo.com/cvs_anon.html
110 For those that are actively contributing there is even CVS write access:
111 http://opensource.lineo.com/cvs_write.html
115 Please feed suggestions, bug reports, insults, and bribes back to:
118 <andersee@debian.org>
119 <andersee@codepoet.org>
122 Many thanks to go to Lineo for paying me to work on busybox.