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busybox/Config.in
Bernhard Reutner-Fischer a1bccc0ba8 - typos: s/compatability/compatibility/g;s/compatable/compatible/g;
2006-04-02 20:17:55 +00:00

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#
# For a description of the syntax of this configuration file,
# see scripts/kbuild/config-language.txt.
#
mainmenu "BusyBox Configuration"
config HAVE_DOT_CONFIG
bool
default y
menu "Busybox Settings"
menu "General Configuration"
choice
prompt "Buffer allocation policy"
default CONFIG_FEATURE_BUFFERS_USE_MALLOC
help
There are 3 ways BusyBox can handle buffer allocations:
- Use malloc. This costs code size for the call to xmalloc.
- Put them on stack. For some very small machines with limited stack
space, this can be deadly. For most folks, this works just fine.
- Put them in BSS. This works beautifully for computers with a real
MMU (and OS support), but wastes runtime RAM for uCLinux. This
behavior was the only one available for BusyBox versions 0.48 and
earlier.
config CONFIG_FEATURE_BUFFERS_USE_MALLOC
bool "Allocate with Malloc"
config CONFIG_FEATURE_BUFFERS_GO_ON_STACK
bool "Allocate on the Stack"
config CONFIG_FEATURE_BUFFERS_GO_IN_BSS
bool "Allocate in the .bss section"
endchoice
config CONFIG_SHOW_USAGE
bool "Show terse applet usage messages"
default y
help
All BusyBox applets will show help messages when invoked with
wrong arguments. You can turn off printing these terse usage
messages if you say no here.
This will save you up to 7k.
config CONFIG_FEATURE_VERBOSE_USAGE
bool "Show verbose applet usage messages"
default n
select CONFIG_SHOW_USAGE
help
All BusyBox applets will show more verbose help messages when
busybox is invoked with --help. This will add a lot of text to the
busybox binary. In the default configuration, this will add about
13k, but it can add much more depending on your configuration.
config CONFIG_FEATURE_INSTALLER
bool "Support --install [-s] to install applet links at runtime"
default n
help
Enable 'busybox --install [-s]' support. This will allow you to use
busybox at runtime to create hard links or symlinks for all the
applets that are compiled into busybox. This feature requires the
/proc filesystem.
config CONFIG_LOCALE_SUPPORT
bool "Enable locale support (system needs locale for this to work)"
default n
help
Enable this if your system has locale support and you would like
busybox to support locale settings.
config CONFIG_FEATURE_DEVFS
bool "Support for devfs"
default n
help
Enable if you want BusyBox to work with devfs.
config CONFIG_FEATURE_DEVPTS
bool "Use the devpts filesystem for Unix98 PTYs"
default y if CONFIG_FEATURE_DEVFS
help
Enable if you want BusyBox to use Unix98 PTY support. If enabled,
busybox will use /dev/ptmx for the master side of the pseudoterminal
and /dev/pts/<number> for the slave side. Otherwise, BSD style
/dev/ttyp<number> will be used. To use this option, you should have
devpts or devfs mounted.
config CONFIG_FEATURE_CLEAN_UP
bool "Clean up all memory before exiting (usually not needed)"
default n
help
As a size optimization, busybox normally exits without explicitly
freeing dynamically allocated memory or closing files. This saves
space since the OS will clean up for us, but it can confuse debuggers
like valgrind, which report tons of memory and resource leaks.
Don't enable this unless you have a really good reason to clean
things up manually.
config CONFIG_FEATURE_SUID
bool "Support for SUID/SGID handling"
default n
help
Support SUID and SGID binaries.
config CONFIG_FEATURE_SUID_CONFIG
bool "Runtime SUID/SGID configuration via /etc/busybox.conf"
default n if CONFIG_FEATURE_SUID
depends on CONFIG_FEATURE_SUID
help
Allow the SUID / SGID state of an applet to be determined runtime by
checking /etc/busybox.conf. The format of this file is as follows:
<applet> = [Ssx-][Ssx-][x-] (<username>|<uid>).(<groupname>|<gid>)
An example might help:
[SUID]
su = ssx root.0 # applet su can be run by anyone and runs with euid=0/egid=0
su = ssx # exactly the same
mount = sx- root.disk # applet mount can be run by root and members of group disk
# and runs with euid=0
cp = --- # disable applet cp for everyone
The file has to be owned by user root, group root and has to be
writeable only by root:
(chown 0.0 /etc/busybox.conf; chmod 600 /etc/busybox.conf)
The busybox executable has to be owned by user root, group
root and has to be setuid root for this to work:
(chown 0.0 /bin/busybox; chmod 4755 /bin/busybox)
Robert 'sandman' Griebl has more information here:
<url: http://www.softforge.de/bb/suid.html >.
config CONFIG_FEATURE_SUID_CONFIG_QUIET
bool "Suppress warning message if /etc/busybox.conf is not readable"
default n
depends on CONFIG_FEATURE_SUID_CONFIG
help
/etc/busybox.conf should be readable by the user needing the SUID, check
this option to avoid users to be notified about missing permissions.
config CONFIG_SELINUX
bool "Support NSA Security Enhanced Linux"
default n
help
Enable support for SELinux in applets ls, ps, and id. Also provide
the option of compiling in SELinux applets.
If you do not have a complete SELinux userland installed, this stuff
will not compile. Go visit
http://www.nsa.gov/selinux/index.html
to download the necessary stuff to allow busybox to compile with
this option enabled. Specifially, libselinux 1.28 or better is
directly required by busybox. If the installation is located in a
non-standard directory, provide it by invoking make as follows:
CFLAGS=-I<libselinux-include-path> \
LDFLAGS=-L<libselinux-lib-path> \
make
Most people will leave this set to 'N'.
endmenu
menu 'Build Options'
config CONFIG_STATIC
bool "Build BusyBox as a static binary (no shared libs)"
default n
help
If you want to build a static BusyBox binary, which does not
use or require any shared libraries, then enable this option.
This can cause BusyBox to be considerably larger, so you should
leave this option false unless you have a good reason (i.e.
your target platform does not support shared libraries, or
you are building an initrd which doesn't need anything but
BusyBox, etc).
Most people will leave this set to 'N'.
# The busybox shared library feature is there so make standalone can produce
# smaller applets. Since make standalone isn't in yet, there's nothing using
# this yet, and so it's disabled.
config CONFIG_DISABLE_SHARED
bool
default n
config CONFIG_BUILD_LIBBUSYBOX
bool "Build shared libbusybox"
default n
depends on CONFIG_DISABLE_SHARED
help
Build a shared library libbusybox.so which contains all
libraries used inside busybox.
config CONFIG_FEATURE_FULL_LIBBUSYBOX
bool "Feature-complete libbusybox"
default n if !CONFIG_FEATURE_SHARED_BUSYBOX
depends on CONFIG_BUILD_LIBBUSYBOX
help
Build a libbusybox with the complete feature-set, disregarding
the actually selected config.
Normally, libbusybox will only contain the features which are
used by busybox itself. If you plan to write a separate
standalone application which uses libbusybox say 'Y'.
Note: libbusybox is GPL, not LGPL, and exports no stable API that
might act as a copyright barrier. We can and will modify the
exported function set between releases (even minor version number
changes), and happily break out-of-tree features.
Say 'N' if in doubt.
config CONFIG_FEATURE_SHARED_BUSYBOX
bool "Use shared libbusybox for busybox"
default y if CONFIG_BUILD_LIBBUSYBOX
depends on !CONFIG_STATIC && CONFIG_BUILD_LIBBUSYBOX
help
Use libbusybox.so also for busybox itself.
You need to have a working dynamic linker to use this variant.
config CONFIG_LFS
bool "Build with Large File Support (for accessing files > 2 GB)"
default n
select FDISK_SUPPORT_LARGE_DISKS
help
If you want to build BusyBox with large file support, then enable
this option. This will have no effect if your kernel or your C
library lacks large file support for large files. Some of the
programs that can benefit from large file support include dd, gzip,
cp, mount, tar, and many others. If you want to access files larger
than 2 Gigabytes, enable this option. Otherwise, leave it set to 'N'.
config USING_CROSS_COMPILER
bool "Do you want to build BusyBox with a Cross Compiler?"
default n
help
Do you want to build BusyBox with a Cross Compiler? If so,
then enable this option. Otherwise leave it set to 'N'.
config CROSS_COMPILER_PREFIX
string "Cross Compiler prefix"
default "/usr/i386-linux-uclibc/bin/i386-uclibc-"
depends on USING_CROSS_COMPILER
help
If you want to build BusyBox with a cross compiler, then you
will need to set this to the cross-compiler prefix. For example,
if my cross-compiler is /usr/i386-linux-uclibc/bin/i386-uclibc-gcc
then I would enter '/usr/i386-linux-uclibc/bin/i386-uclibc-' here,
which will ensure the correct compiler is used.
config EXTRA_CFLAGS_OPTIONS
string "Any extra CFLAGS options for the compiler?"
default ""
help
Do you want to pass any extra CFLAGS options to the compiler as
you build BusyBox? If so, this is the option for you... For example,
if you want to add some simple compiler switches (like -march=i686),
or check for warnings using -Werror, just those options here.
config CONFIG_BUILD_AT_ONCE
bool "Compile all sources at once"
default n
help
Normally each source-file is compiled with one invocation of
the compiler.
If you set this option, all sources are compiled at once.
This gives the compiler more opportunities to optimize which can
result in smaller and/or faster binaries.
Setting this option will consume alot of memory, e.g. if you
enable all applets with all features, gcc uses more than 300MB
RAM during compilation of busybox.
This option is most likely only beneficial for newer compilers
such as gcc-4.1 and above.
Say 'N' unless you know what you are doing.
endmenu
menu 'Debugging Options'
config CONFIG_DEBUG
bool "Build BusyBox with Debugging symbols"
default n
help
Say Y here if you wish to compile BusyBox with debugging symbols.
This will allow you to use a debugger to examine BusyBox internals
while applets are running. This increases the size of the binary
considerably and should only be used when doing development.
If you are doing development and want to debug BusyBox, answer Y.
Most people should answer N.
choice
prompt "Additional debugging library"
default CONFIG_NO_DEBUG_LIB
depends on CONFIG_DEBUG
help
Using an additional debugging library will make BusyBox become
considerable larger and will cause it to run more slowly. You
should always leave this option disabled for production use.
dmalloc support:
----------------
This enables compiling with dmalloc ( http://dmalloc.com/ )
which is an excellent public domain mem leak and malloc problem
detector. To enable dmalloc, before running busybox you will
want to properly set your environment, for example:
export DMALLOC_OPTIONS=debug=0x34f47d83,inter=100,log=logfile
The 'debug=' value is generated using the following command
dmalloc -p log-stats -p log-non-free -p log-bad-space -p log-elapsed-time \
-p check-fence -p check-heap -p check-lists -p check-blank \
-p check-funcs -p realloc-copy -p allow-free-null
Electric-fence support:
-----------------------
This enables compiling with Electric-fence support. Electric
fence is another very useful malloc debugging library which uses
your computer's virtual memory hardware to detect illegal memory
accesses. This support will make BusyBox be considerable larger
and run slower, so you should leave this option disabled unless
you are hunting a hard to find memory problem.
config CONFIG_NO_DEBUG_LIB
bool "None"
config CONFIG_DMALLOC
bool "Dmalloc"
config CONFIG_EFENCE
bool "Electric-fence"
endchoice
config CONFIG_DEBUG_YANK_SUSv2
bool "Disable obsolete features removed before SUSv3?"
default y
help
This option will disable backwards compatibility with SuSv2,
specifically, old-style numeric options ('command -1 <file>')
will not be supported in head, tail, and fold. (Note: should
yank from renice too.)
endmenu
menu 'Installation Options'
config CONFIG_INSTALL_NO_USR
bool "Don't use /usr"
default n
help
Disable use of /usr. Don't activate this option if you don't know
that you really want this behaviour.
choice
prompt "Applets links"
default CONFIG_INSTALL_APPLET_SYMLINKS
help
Choose how you install applets links.
config CONFIG_INSTALL_APPLET_SYMLINKS
bool "as soft-links"
help
Install applets as soft-links to the busybox binary. This needs some
free inodes on the filesystem, but might help with filesystem
generators that can't cope with hard-links.
config CONFIG_INSTALL_APPLET_HARDLINKS
bool "as hard-links"
help
Install applets as hard-links to the busybox binary. This might count
on a filesystem with few inodes.
config CONFIG_INSTALL_APPLET_DONT
bool
prompt "not installed"
depends on CONFIG_FEATURE_INSTALLER || CONFIG_FEATURE_SH_STANDALONE_SHELL
help
Do not install applets links. Usefull when using the -install feature
or a standalone shell for rescue pruposes.
endchoice
config PREFIX
string "BusyBox installation prefix"
default "./_install"
help
Define your directory to install BusyBox files/subdirs in.
endmenu
source libbb/Config.in
endmenu
comment "Applets"
source archival/Config.in
source coreutils/Config.in
source console-tools/Config.in
source debianutils/Config.in
source editors/Config.in
source findutils/Config.in
source init/Config.in
source loginutils/Config.in
source e2fsprogs/Config.in
source modutils/Config.in
source util-linux/Config.in
source miscutils/Config.in
source networking/Config.in
source procps/Config.in
source shell/Config.in
source sysklogd/Config.in
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