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Eric Andersen fd7a4c8c28 Jonas Holmberg from axis dot com writes:
This patch makes msh handle variable expansion within backticks more
correctly.

Current behaviour (wrong):
--------------------------

BusyBox v1.00-rc3 (2004.08.26-11:51+0000) Built-in shell (msh)
Enter 'help' for a list of built-in commands.

$ A='`echo hello`'
$ echo $A
`echo hello`
$ echo `echo $A`
hello
$


New behaviour (correct):
------------------------

BusyBox v1.00-rc3 (2004.08.26-11:51+0000) Built-in shell (msh)
Enter 'help' for a list of built-in commands.

$ A='`echo hello`'
$ echo $A
`echo hello`
$ echo `echo $A`
`echo hello`
$

The current behaviour (wrong according to standards) was actually my
fault. msh handles backticks by executing a subshell (which makes it
work on MMU-less systems). Executing a subshell makes it hard to only
expand variables once in the parent. Therefore I export all variables
that will be expanded within the backticks and let the subshell handle
the expansion instead.

The bug was found while searching for security leaks in CGI-scripts.
Current behaviour of msh makes it easy to expand backticks by mistake
in $QUERY_STRING. I recommend appling the patch before release of bb
1.00.

/Jonas
2004-09-02 23:13:10 +00:00
applets Larry Doolittle writes: 2004-04-14 17:51:38 +00:00
archival Fixup some warnings 2004-08-28 00:43:07 +00:00
console-tools Remove trailing whitespace. Update copyright to include 2004. 2004-03-15 08:29:22 +00:00
coreutils Tito writes: 2004-09-02 22:21:41 +00:00
debian Remove the CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN option. It was sortof 2004-04-07 09:34:27 +00:00
debianutils Fix several problems with start-stop-daemon, add -m support 2004-04-13 18:28:46 +00:00
docs Prepare for release 2004-08-16 10:29:29 +00:00
editors regularly update the status line display 2004-08-19 19:15:06 +00:00
examples Add an example inetd.conf file 2004-04-07 10:34:16 +00:00
findutils Make the grep option values a bit less horrible 2004-05-26 11:48:29 +00:00
include Tito writes: 2004-09-02 22:22:17 +00:00
init Quiet a few warnings 2004-08-27 19:55:28 +00:00
libbb No longer needed 2004-09-02 23:11:53 +00:00
libpwdgrp Replace the old and somewhat buggy pwd_grp stuff with the shiny 2004-07-15 12:53:49 +00:00
loginutils Tito writes: 2004-09-02 22:22:17 +00:00
miscutils Improve the setuid situation a bit, and make it more apparent 2004-08-26 23:13:00 +00:00
modutils Based on patches from Mike Frysinger, add insmod support for 2004-09-02 23:03:25 +00:00
networking Fixup some warnings 2004-08-28 00:43:07 +00:00
patches No longer needed 2004-09-02 23:11:53 +00:00
procps Patch from Tito adding support for '-q' 2004-08-19 18:26:26 +00:00
scripts Peter Kjellerstedt at axis.com writes: 2004-07-15 06:01:05 +00:00
shell Jonas Holmberg from axis dot com writes: 2004-09-02 23:13:10 +00:00
sysdeps/linux Update the default config to not ask stuff 2004-07-20 06:06:56 +00:00
sysklogd Tito writes: 2004-09-02 22:22:17 +00:00
testsuite Add two fundamental tests for copying directories 2004-04-18 13:35:56 +00:00
util-linux Fixup some warnings 2004-08-28 00:43:07 +00:00
.cvsignore Yet another major rework of the BusyBox config system, using the considerably 2002-12-05 08:41:41 +00:00
.indent.pro First revision of the Busybox Style Guide and an accompanying .indent.pro 2000-07-24 22:36:06 +00:00
AUTHORS document stuff I have done 2004-07-26 18:57:49 +00:00
Changelog Prepare for release 2004-08-16 10:29:29 +00:00
INSTALL Remove trailing whitespace. Update copyright to include 2004. 2004-03-15 08:29:22 +00:00
LICENSE Update a bunch of docs. Run a script to update my email addr. 2003-07-14 21:21:08 +00:00
Makefile Improve the setuid situation a bit, and make it more apparent 2004-08-26 23:13:00 +00:00
README Based on patches from Mike Frysinger, add insmod support for 2004-09-02 23:03:25 +00:00
Rules.mak Bump version 2004-08-16 10:23:33 +00:00
TODO Re-add the TODO list, mention tr 2004-05-01 00:49:49 +00:00

Please see the LICENSE file for details on copying and usage.

BusyBox combines tiny versions of many common UNIX utilities into a single
small executable. It provides minimalist replacements for most of the utilities
you usually find in GNU coreutils, util-linux, etc. The utilities in BusyBox
generally have fewer options than their full-featured GNU cousins; however, the
options that are included provide the expected functionality and behave very
much like their GNU counterparts.

BusyBox has been written with size-optimization and limited resources in mind.
It is also extremely modular so you can easily include or exclude commands (or
features) at compile time. This makes it easy to customize your embedded
systems. To create a working system, just add /dev, /etc, and a Linux kernel.
BusyBox provides a fairly complete POSIX environment for any small or embedded
system.

BusyBox is extremely configurable.  This allows you to include only the
components you need, thereby reducing binary size. Run 'make config' or
'make menuconfig' to select the functionality that you wish to enable.

After the build is complete, a busybox.links file is generated.  This is
used by 'make install' to create symlinks to the BusyBox binary for all
compiled in functions.  By default, 'make install' will place the symlink
forest into `pwd`/_install unless you have defined the PREFIX environment
variable (i.e., 'make PREFIX=/tmp/foo install')

If you wish to install hard links, rather than symlinks, you can use
'make PREFIX=/tmp/foo install-hardlinks' instead.

----------------

Supported architectures:

   BusyBox in general will build on any architecture supported by gcc.  It has
   a few specialized features added for __sparc__ and __alpha__.  insmod
   functionality is currently limited to ARM, CRIS, H8/300, x86, ia64,
   x86_64, m68k, MIPS, PowerPC, S390, SH3/4/5, Sparc, v850e, and x86_64
   for 2.4.x kernels.  For 2.6.x kernels

Supported C Libraries:

   uClibc and glibc are supported.  People have been looking at newlib and
   diet-libc, but they are currently considered unsupported, untested, or
   worse.  Linux-libc5 is no longer supported -- you should probably use uClibc
   instead if you want a small C library.

Supported kernels:

   Full functionality requires Linux 2.2.x or better.  A large fraction of the
   code should run on just about anything.  While the current code is fairly
   Linux specific, it should be fairly easy to port the majority of the code
   to support, say, FreeBSD or Solaris, or Mac OS X, or even Windows (if you
   are into that sort of thing).

----------------

Getting help:

When you find you need help, you can check out the BusyBox mailing list
archives at http://busybox.net/lists/busybox/ or even join
the mailing list if you are interested.

----------------

Bugs:

If you find bugs, please submit a detailed bug report to the BusyBox mailing
list at busybox@mail.busybox.net.  A well-written bug report should include a
transcript of a shell session that demonstrates the bad behavior and enables
anyone else to duplicate the bug on their own machine. The following is such
an example:

    To: busybox@mail.busybox.net
    From: diligent@testing.linux.org
    Subject: /bin/date doesn't work

    Package: BusyBox
    Version: 1.00

    When I execute BusyBox 'date' it produces unexpected results.
    With GNU date I get the following output:

	$ date
	Sat Mar 27 14:19:41 MST 2004

    But when I use BusyBox date I get this instead:

	$ date
	illegal instruction

    I am using Debian unstable, kernel version 2.4.25-vrs2 on a Netwinder,
    and the latest uClibc from CVS.  Thanks for the wonderful program!

	-Diligent

Note the careful description and use of examples showing not only what BusyBox
does, but also a counter example showing what an equivalent GNU app does.  Bug
reports lacking such detail may never be fixed...  Thanks for understanding.

----------------

Downloads:

Source for the latest released version, as well as daily snapshots, can always
be downloaded from
    http://busybox.net/downloads/

----------------

CVS:

BusyBox now has its own publicly browsable CVS tree at:
    http://busybox.net/cgi-bin/cvsweb/busybox/

Anonymous CVS access is available.  For instructions, check out:
    http://busybox.net/cvs_anon.html

For those that are actively contributing there is even CVS write access:
    http://busybox.net/cvs_write.html

----------------

Please feed suggestions, bug reports, insults, and bribes back to:
	Erik Andersen
	<andersen@codepoet.org>