--- trunk/mkinitrd-magellan/busybox/Config.in 2009/04/24 18:32:46 815 +++ trunk/mkinitrd-magellan/busybox/Config.in 2009/04/24 18:33:46 816 @@ -13,22 +13,6 @@ menu "General Configuration" -config NITPICK - bool "See lots more (probably unnecessary) configuration options." - default n - help - Some BusyBox applets have more configuration options than anyone - will ever care about. To avoid drowining people in complexity, most - of the applet features that can be set to a sane default value are - hidden, unless you hit the above switch. - - This is better than to telling people to edit the busybox source - code, but not by much. - - See http://en.wikipedia.org/wiki/Fibber_McGee_and_Molly#The_Closet - - You have been warned. - config DESKTOP bool "Enable options for full-blown desktop systems" default n @@ -37,15 +21,35 @@ Select this only if you plan to use busybox on full-blown desktop machine with common Linux distro, not on an embedded box. +config EXTRA_COMPAT + bool "Provide compatible behavior for rare corner cases (bigger code)" + default n + help + This option makes grep, sed etc handle rare corner cases + (embedded NUL bytes and such). This makes code bigger and uses + some GNU extensions in libc. You probably only need this option + if you plan to run busybox on desktop. + +config FEATURE_ASSUME_UNICODE + bool "Assume that 1:1 char/glyph correspondence is not true" + default n + help + This makes various applets aware that one byte is not + one character on screen. + + Busybox aims to eventually work correctly with Unicode displays. + Any older encodings are not guaranteed to work. + Probably by the time when busybox will be fully Unicode-clean, + other encodings will be mainly of historic interest. + choice prompt "Buffer allocation policy" default FEATURE_BUFFERS_USE_MALLOC - depends on NITPICK 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. + 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 @@ -77,8 +81,8 @@ select 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 + 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 FEATURE_COMPRESS_USAGE @@ -91,18 +95,17 @@ If you have a really tiny busybox with few applets enabled (and bunzip2 isn't one of them), the overhead of the decompressor might - be noticeable. Also, if you run executables directly from ROM - and have very little memory, this might not be a win. Otherwise, + be noticeable. Also, if you run executables directly from ROM + and have very little memory, this might not be a win. Otherwise, you probably want this. 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 + 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. + applets that are compiled into busybox. config LOCALE_SUPPORT bool "Enable locale support (system needs locale for this to work)" @@ -112,7 +115,7 @@ busybox to support locale settings. config GETOPT_LONG - bool "Enable support for --long-options" + bool "Support for --long-options" default y help Enable this if you want busybox applets to use the gnu --long-option @@ -124,44 +127,45 @@ 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 + and /dev/pts/ for the slave side. Otherwise, BSD style /dev/ttyp will be used. To use this option, you should have devpts mounted. config FEATURE_CLEAN_UP bool "Clean up all memory before exiting (usually not needed)" default n - depends on NITPICK help As a size optimization, busybox normally exits without explicitly - freeing dynamically allocated memory or closing files. This saves + 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 FEATURE_PIDFILE + bool "Support writing pidfiles" + default n + help + This option makes some applets (e.g. crond, syslogd, inetd) write + a pidfile in /var/run. Some applications rely on them. + config FEATURE_SUID bool "Support for SUID/SGID handling" default n help With this option you can install the busybox binary belonging - to root with the suid bit set, and it'll and it'll automatically drop + to root with the suid bit set, and it will automatically drop priviledges for applets that don't need root access. - If you're really paranoid and don't want to do this, build two + If you are really paranoid and don't want to do this, build two busybox binaries with different applets in them (and the appropriate symlinks pointing to each binary), and only set the suid bit on the - one that needs it. The applets currently marked to need the suid bit - are login, passwd, su, ping, traceroute, crontab, dnsd, ipcrm, ipcs, - and vlock. + one that needs it. The applets currently marked to need the suid bit + are: -config FEATURE_SYSLOG - bool "Support for syslog" - default n - help - This option is auto-selected when you select any applet which may - send its output to syslog. You do not need to select it manually. + crontab, dnsd, findfs, ipcrm, ipcs, login, passwd, ping, su, + traceroute, vlock. config FEATURE_SUID_CONFIG bool "Runtime SUID/SGID configuration via /etc/busybox.conf" @@ -169,7 +173,7 @@ depends on FEATURE_SUID help Allow the SUID / SGID state of an applet to be determined at runtime - by checking /etc/busybox.conf. (This is sort of a poor man's sudo.) + by checking /etc/busybox.conf. (This is sort of a poor man's sudo.) The format of this file is as follows: = [Ssx-][Ssx-][x-] (|).(|) @@ -177,20 +181,21 @@ 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 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 + 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) + (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) + (chown 0.0 /bin/busybox; chmod 4755 /bin/busybox) Robert 'sandman' Griebl has more information here: . @@ -200,22 +205,15 @@ default y depends on 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 FEATURE_HAVE_RPC - bool "RPC support" - default y - help - Select this if you have rpc support. - This automatically turns off all configuration options that rely - on RPC. + /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 SELINUX bool "Support NSA Security Enhanced Linux" default n help - Enable support for SELinux in applets ls, ps, and id. Also provide + 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 @@ -231,16 +229,46 @@ Most people will leave this set to 'N'. +config FEATURE_PREFER_APPLETS + bool "exec prefers applets" + default n + help + This is an experimental option which directs applets about to + call 'exec' to try and find an applicable busybox applet before + searching the PATH. This is typically done by exec'ing + /proc/self/exe. + This may affect shell, find -exec, xargs and similar applets. + They will use applets even if /bin/ -> busybox link + is missing (or is not a link to busybox). However, this causes + problems in chroot jails without mounted /proc and with ps/top + (command name can be shown as 'exe' for applets started this way). + config BUSYBOX_EXEC_PATH string "Path to BusyBox executable" default "/proc/self/exe" help When Busybox applets need to run other busybox applets, BusyBox - sometimes needs to exec() itself. When the /proc filesystem is + sometimes needs to exec() itself. When the /proc filesystem is mounted, /proc/self/exe always points to the currently running - executable. If you haven't got /proc, set this to wherever you + executable. If you haven't got /proc, set this to wherever you want to run BusyBox from. +# These are auto-selected by other options + +config FEATURE_SYSLOG + bool #No description makes it a hidden option + default n + #help + # This option is auto-selected when you select any applet which may + # send its output to syslog. You do not need to select it manually. + +config FEATURE_HAVE_RPC + bool #No description makes it a hidden option + default n + #help + # This is automatically selected if any of enabled applets need it. + # You do not need to select it manually. + endmenu menu 'Build Options' @@ -259,44 +287,104 @@ Most people will leave this set to 'N'. +config PIE + bool "Build BusyBox as a position independent executable" + default n + depends on !STATIC + help + (TODO: what is it and why/when is it useful?) + Most people will leave this set to 'N'. + +config NOMMU + bool "Force NOMMU build" + default n + help + Busybox tries to detect whether architecture it is being + built against supports MMU or not. If this detection fails, + or if you want to build NOMMU version of busybox for testing, + you may force NOMMU build here. + + Most people will leave this set to 'N'. + +# PIE can be made to work with BUILD_LIBBUSYBOX, but currently +# build system does not support that config BUILD_LIBBUSYBOX bool "Build shared libbusybox" default n + depends on !FEATURE_PREFER_APPLETS && !PIE && !STATIC help - Build a shared library libbusybox.so which contains all - libraries used inside busybox. + Build a shared library libbusybox.so.N.N.N which contains all + busybox code. - This is an experimental feature intended to support the upcoming - "make standalone" mode. Enabling it against the one big busybox - binary serves no purpose (and increases the size). You should - almost certainly say "no" to this right now. - -config FEATURE_FULL_LIBBUSYBOX - bool "Feature-complete libbusybox" - default n if !FEATURE_SHARED_BUSYBOX + This feature allows every applet to be built as a tiny + separate executable. Enabling it for "one big busybox binary" + approach serves no purpose and increases code size. + You should almost certainly say "no" to this. + +### config FEATURE_FULL_LIBBUSYBOX +### bool "Feature-complete libbusybox" +### default n if !FEATURE_SHARED_BUSYBOX +### depends on 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 FEATURE_INDIVIDUAL + bool "Produce a binary for each applet, linked against libbusybox" + default y depends on BUILD_LIBBUSYBOX help - Build a libbusybox with the complete feature-set, disregarding - the actually selected config. + If your CPU architecture doesn't allow for sharing text/rodata + sections of running binaries, but allows for runtime dynamic + libraries, this option will allow you to reduce memory footprint + when you have many different applets running at once. - 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. + If your CPU architecture allows for sharing text/rodata, + having single binary is more optimal. - Say 'N' if in doubt. + Each applet will be a tiny program, dynamically linked + against libbusybox.so.N.N.N. + + You need to have a working dynamic linker. config FEATURE_SHARED_BUSYBOX - bool "Use shared libbusybox for busybox" - default y if BUILD_LIBBUSYBOX - depends on !STATIC && BUILD_LIBBUSYBOX + bool "Produce additional busybox binary linked against libbusybox" + default y + depends on BUILD_LIBBUSYBOX help - Use libbusybox.so also for busybox itself. - You need to have a working dynamic linker to use this variant. + Build busybox, dynamically linked against libbusybox.so.N.N.N. + + You need to have a working dynamic linker. + +### 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. config LFS bool "Build with Large File Support (for accessing files > 2 GB)" @@ -304,30 +392,24 @@ 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 + 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'. + 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 BUILD_AT_ONCE - bool "Compile all sources at once" - default n +config CROSS_COMPILER_PREFIX + string "Cross Compiler prefix" + default "" 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. + If you want to build BusyBox with a cross compiler, then you + will need to set this to the cross-compiler prefix, for example, + "i386-uclibc-". - This option is most likely only beneficial for newer compilers - such as gcc-4.1 and above. + Note that CROSS_COMPILE environment variable or + "make CROSS_COMPILE=xxx ..." will override this selection. - Say 'N' unless you know what you are doing. + Native builds leave this empty. endmenu @@ -338,50 +420,58 @@ default n help Say Y here if you wish 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 + 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. config DEBUG_PESSIMIZE - bool "Disable compiler optimizations." + bool "Disable compiler optimizations" default n depends on DEBUG help The compiler's optimization of source code can eliminate and reorder code, resulting in an executable that's hard to understand when - stepping through it with a debugger. This switches it off, resulting + stepping through it with a debugger. This switches it off, resulting in a much bigger executable that more closely matches the source code. +config WERROR + bool "Abort compilation on any warning" + default n + help + Selecting this will add -Werror to gcc command line. + + Most people should answer N. + choice prompt "Additional debugging library" default NO_DEBUG_LIB - depends on DEBUG help Using an additional debugging library will make BusyBox become - considerable larger and will cause it to run more slowly. You + 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 + 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 + 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 + 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 + 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. @@ -403,9 +493,12 @@ help This option will enable backwards compatibility with SuSv2, specifically, old-style numeric options ('command -1 ') - will be supported in head, tail, and fold. (Note: should + will be supported in head, tail, and fold. (Note: should affect renice too.) +### config PARSE +### bool "Uniform config file parser debugging applet: parse" + endmenu menu 'Installation Options' @@ -418,31 +511,60 @@ that you really want this behaviour. choice - prompt "Applets links" - default INSTALL_APPLET_SYMLINKS - help - Choose how you install applets links. + prompt "Applets links" + default INSTALL_APPLET_SYMLINKS + help + Choose how you install applets links. 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. + 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 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. + bool "as hard-links" + help + Install applets as hard-links to the busybox binary. This might + count on a filesystem with few inodes. + +config INSTALL_APPLET_SCRIPT_WRAPPERS + bool "as script wrappers" + help + Install applets as script wrappers that call the busybox binary. config INSTALL_APPLET_DONT - bool - prompt "not installed" - depends on FEATURE_INSTALLER || FEATURE_SH_STANDALONE_SHELL - help - Do not install applet links. Useful when using the -install feature - or a standalone shell for rescue pruposes. + bool "not installed" + depends on FEATURE_INSTALLER || FEATURE_SH_STANDALONE || FEATURE_PREFER_APPLETS + help + Do not install applet links. Useful when using the -install feature + or a standalone shell for rescue purposes. + +endchoice + +choice + prompt "/bin/sh applet link" + default INSTALL_SH_APPLET_SYMLINK + depends on INSTALL_APPLET_SCRIPT_WRAPPERS + help + Choose how you install /bin/sh applet link. + +config INSTALL_SH_APPLET_SYMLINK + bool "as soft-link" + help + Install /bin/sh applet as soft-link to the busybox binary. + +config INSTALL_SH_APPLET_HARDLINK + bool "as hard-link" + help + Install /bin/sh applet as hard-link to the busybox binary. + +config INSTALL_SH_APPLET_SCRIPT_WRAPPER + bool "as script wrapper" + help + Install /bin/sh applet as script wrapper that call the busybox + binary. endchoice @@ -473,7 +595,10 @@ source util-linux/Config.in source miscutils/Config.in source networking/Config.in +source printutils/Config.in +source mailutils/Config.in source procps/Config.in +source runit/Config.in +source selinux/Config.in source shell/Config.in source sysklogd/Config.in -source runit/Config.in