# # For a description of the syntax of this configuration file, # see scripts/kbuild/config-language.txt. # config BUSYBOX_HAVE_DOT_CONFIG bool default y menu "Busybox Settings" menu "General Configuration" choice prompt "Buffer allocation policy" default BUSYBOX_CONFIG_FEATURE_BUFFERS_GO_ON_STACK 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 BUSYBOX_CONFIG_FEATURE_BUFFERS_USE_MALLOC bool "Allocate with Malloc" config BUSYBOX_CONFIG_FEATURE_BUFFERS_GO_ON_STACK bool "Allocate on the Stack" config BUSYBOX_CONFIG_FEATURE_BUFFERS_GO_IN_BSS bool "Allocate in the .bss section" endchoice config BUSYBOX_CONFIG_FEATURE_VERBOSE_USAGE bool "Show verbose applet usage messages" default y 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 BUSYBOX_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 BUSYBOX_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 BUSYBOX_CONFIG_FEATURE_DEVFS bool "Support for devfs" default y help Enable if you want BusyBox to work with devfs. config BUSYBOX_CONFIG_FEATURE_DEVPTS bool "Use the devpts filesystem for Unix98 PTYs" default y if BUSYBOX_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/ for the slave side. Otherwise, BSD style /dev/ttyp will be used. To use this option, you should have devpts or devfs mounted. config BUSYBOX_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 BUSYBOX_CONFIG_FEATURE_SUID bool "Support for SUID/SGID handling" default y help Support SUID and SGID binaries. config BUSYBOX_CONFIG_FEATURE_SUID_CONFIG bool "Runtime SUID/SGID configuration via /etc/busybox.conf" default n if BUSYBOX_CONFIG_FEATURE_SUID depends on BUSYBOX_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: = [Ssx-][Ssx-][x-] (|).(|) 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: . config BUSYBOX_CONFIG_FEATURE_SUID_CONFIG_QUIET bool "Suppress warning message if /etc/busybox.conf is not readable" default n depends on BUSYBOX_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 BUSYBOX_CONFIG_SELINUX bool "Support NSA Security Enhanced Linux" default n help Enable support for SE Linux in applets ls, ps, and id. Also provide the option of compiling in SE Linux applets. If you do not have a complete SE Linux Full 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. Most people will leave this set to 'N'. endmenu menu 'Build Options' config BUSYBOX_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 BUSYBOX_CONFIG_DISABLE_SHARED bool default n config BUSYBOX_CONFIG_BUILD_LIBBUSYBOX bool "Build shared libbusybox" default n depends on BUSYBOX_CONFIG_DISABLE_SHARED help Build a shared library libbusybox.so which contains all libraries used inside busybox. config BUSYBOX_CONFIG_FEATURE_FULL_LIBBUSYBOX bool "Feature-complete libbusybox" default n if !CONFIG_FEATURE_SHARED_BUSYBOX depends on BUSYBOX_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 BUSYBOX_CONFIG_FEATURE_SHARED_BUSYBOX bool "Use shared libbusybox for busybox" default n if BUSYBOX_CONFIG_BUILD_LIBBUSYBOX depends on !CONFIG_STATIC && BUSYBOX_CONFIG_BUILD_LIBBUSYBOX help Use libbusybox.so also for busybox itself. You need to have a working dynamic linker to use this variant. config BUSYBOX_CONFIG_LFS bool default y select BUSYBOX_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 BUSYBOX_USING_CROSS_COMPILER bool default y help Do you want to build BusyBox with a Cross Compiler? If so, then enable this option. Otherwise leave it set to 'N'. config BUSYBOX_CROSS_COMPILER_PREFIX string default "mipsel-uclibc-" depends on BUSYBOX_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 BUSYBOX_EXTRA_CFLAGS_OPTIONS string default "-Os " 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 BUSYBOX_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 BUSYBOX_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 BUSYBOX_CONFIG_NO_DEBUG_LIB depends on BUSYBOX_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 BUSYBOX_CONFIG_NO_DEBUG_LIB bool "None" config BUSYBOX_CONFIG_DMALLOC bool "Dmalloc" config BUSYBOX_CONFIG_EFENCE bool "Electric-fence" endchoice config BUSYBOX_CONFIG_DEBUG_YANK_SUSv2 bool "Disable obsolete features removed before SUSv3?" default y help This option will disable backwards compatability with SuSv2, specifically, old-style numeric options ('command -1 ') will not be supported in head, tail, and fold. (Note: should yank from renice too.) endmenu menu 'Installation Options' config BUSYBOX_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 BUSYBOX_CONFIG_INSTALL_APPLET_SYMLINKS help Choose how you install applets links. config BUSYBOX_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 BUSYBOX_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 BUSYBOX_CONFIG_INSTALL_APPLET_DONT bool prompt "not installed" depends on BUSYBOX_CONFIG_FEATURE_INSTALLER || BUSYBOX_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 BUSYBOX_PREFIX string default "./_install" help Define your directory to install BusyBox files/subdirs in. endmenu source package/busybox/config/libbb/Config.in endmenu comment "Applets" source package/busybox/config/archival/Config.in source package/busybox/config/coreutils/Config.in source package/busybox/config/console-tools/Config.in source package/busybox/config/debianutils/Config.in source package/busybox/config/editors/Config.in source package/busybox/config/findutils/Config.in source package/busybox/config/init/Config.in source package/busybox/config/loginutils/Config.in source package/busybox/config/e2fsprogs/Config.in source package/busybox/config/modutils/Config.in source package/busybox/config/util-linux/Config.in source package/busybox/config/miscutils/Config.in source package/busybox/config/networking/Config.in source package/busybox/config/procps/Config.in source package/busybox/config/shell/Config.in source package/busybox/config/sysklogd/Config.in