| # |
| # For a description of the syntax of this configuration file, |
| # see scripts/kbuild/config-language.txt. |
| # |
| |
| menu "Busybox Library Tuning" |
| |
| INSERT |
| |
| config PASSWORD_MINLEN |
| int "Minimum password length" |
| default 6 |
| range 5 32 |
| help |
| Minimum allowable password length. |
| |
| config MD5_SMALL |
| int "MD5: Trade bytes for speed (0:fast, 3:slow)" |
| default 1 |
| range 0 3 |
| help |
| Trade binary size versus speed for the md5sum algorithm. |
| Approximate values running uClibc and hashing |
| linux-2.4.4.tar.bz2 were: |
| user times (sec) text size (386) |
| 0 (fastest) 1.1 6144 |
| 1 1.4 5392 |
| 2 3.0 5088 |
| 3 (smallest) 5.1 4912 |
| |
| config SHA3_SMALL |
| int "SHA3: Trade bytes for speed (0:fast, 1:slow)" |
| default 1 |
| range 0 1 |
| help |
| Trade binary size versus speed for the sha3sum algorithm. |
| SHA3_SMALL=0 compared to SHA3_SMALL=1 (approximate): |
| 64-bit x86: +270 bytes of code, 45% faster |
| 32-bit x86: +450 bytes of code, 75% faster |
| |
| config FEATURE_FAST_TOP |
| bool "Faster /proc scanning code (+100 bytes)" |
| default y |
| help |
| This option makes top (and ps) ~20% faster (or 20% less CPU hungry), |
| but code size is slightly bigger. |
| |
| config FEATURE_ETC_NETWORKS |
| bool "Support for /etc/networks" |
| default n |
| help |
| Enable support for network names in /etc/networks. This is |
| a rarely used feature which allows you to use names |
| instead of IP/mask pairs in route command. |
| |
| config FEATURE_USE_TERMIOS |
| bool "Use termios to manipulate the screen" |
| default y |
| depends on MORE || TOP || POWERTOP |
| help |
| This option allows utilities such as 'more' and 'top' to determine |
| the size of the screen. If you leave this disabled, your utilities |
| that display things on the screen will be especially primitive and |
| will be unable to determine the current screen size, and will be |
| unable to move the cursor. |
| |
| config FEATURE_EDITING |
| bool "Command line editing" |
| default y |
| help |
| Enable line editing (mainly for shell command line). |
| |
| config FEATURE_EDITING_MAX_LEN |
| int "Maximum length of input" |
| range 128 8192 |
| default 1024 |
| depends on FEATURE_EDITING |
| help |
| Line editing code uses on-stack buffers for storage. |
| You may want to decrease this parameter if your target machine |
| benefits from smaller stack usage. |
| |
| config FEATURE_EDITING_VI |
| bool "vi-style line editing commands" |
| default n |
| depends on FEATURE_EDITING |
| help |
| Enable vi-style line editing. In shells, this mode can be |
| turned on and off with "set -o vi" and "set +o vi". |
| |
| config FEATURE_EDITING_HISTORY |
| int "History size" |
| # Don't allow way too big values here, code uses fixed "char *history[N]" struct member |
| range 0 9999 |
| default 255 |
| depends on FEATURE_EDITING |
| help |
| Specify command history size (0 - disable). |
| |
| config FEATURE_EDITING_SAVEHISTORY |
| bool "History saving" |
| default y |
| depends on FEATURE_EDITING |
| help |
| Enable history saving in shells. |
| |
| config FEATURE_EDITING_SAVE_ON_EXIT |
| bool "Save history on shell exit, not after every command" |
| default n |
| depends on FEATURE_EDITING_SAVEHISTORY |
| help |
| Save history on shell exit, not after every command. |
| |
| config FEATURE_REVERSE_SEARCH |
| bool "Reverse history search" |
| default y |
| depends on FEATURE_EDITING_SAVEHISTORY |
| help |
| Enable readline-like Ctrl-R combination for reverse history search. |
| Increases code by about 0.5k. |
| |
| config FEATURE_TAB_COMPLETION |
| bool "Tab completion" |
| default y |
| depends on FEATURE_EDITING |
| help |
| Enable tab completion. |
| |
| config FEATURE_USERNAME_COMPLETION |
| bool "Username completion" |
| default n |
| depends on FEATURE_TAB_COMPLETION |
| help |
| Enable username completion. |
| |
| config FEATURE_EDITING_FANCY_PROMPT |
| bool "Fancy shell prompts" |
| default y |
| depends on FEATURE_EDITING |
| help |
| Setting this option allows for prompts to use things like \w and |
| \$ and escape codes. |
| |
| config FEATURE_EDITING_ASK_TERMINAL |
| bool "Query cursor position from terminal" |
| default n |
| depends on FEATURE_EDITING |
| help |
| Allow usage of "ESC [ 6 n" sequence. Terminal answers back with |
| current cursor position. This information is used to make line |
| editing more robust in some cases. |
| If you are not sure whether your terminals respond to this code |
| correctly, or want to save on code size (about 400 bytes), |
| then do not turn this option on. |
| |
| config FEATURE_NON_POSIX_CP |
| bool "Non-POSIX, but safer, copying to special nodes" |
| default y |
| help |
| With this option, "cp file symlink" will delete symlink |
| and create a regular file. This does not conform to POSIX, |
| but prevents a symlink attack. |
| Similarly, "cp file device" will not send file's data |
| to the device. (To do that, use "cat file >device") |
| |
| config FEATURE_VERBOSE_CP_MESSAGE |
| bool "Give more precise messages when copy fails (cp, mv etc)" |
| default n |
| help |
| Error messages with this feature enabled: |
| $ cp file /does_not_exist/file |
| cp: cannot create '/does_not_exist/file': Path does not exist |
| $ cp file /vmlinuz/file |
| cp: cannot stat '/vmlinuz/file': Path has non-directory component |
| If this feature is not enabled, they will be, respectively: |
| cp: cannot create '/does_not_exist/file': No such file or directory |
| cp: cannot stat '/vmlinuz/file': Not a directory |
| This will cost you ~60 bytes. |
| |
| config FEATURE_COPYBUF_KB |
| int "Copy buffer size, in kilobytes" |
| range 1 1024 |
| default 4 |
| help |
| Size of buffer used by cp, mv, install, wget etc. |
| Buffers which are 4 kb or less will be allocated on stack. |
| Bigger buffers will be allocated with mmap, with fallback to 4 kb |
| stack buffer if mmap fails. |
| |
| config FEATURE_SKIP_ROOTFS |
| bool "Skip rootfs in mount table" |
| default y |
| help |
| Ignore rootfs entry in mount table. |
| |
| In Linux, kernel has a special filesystem, rootfs, which is initially |
| mounted on /. It contains initramfs data, if kernel is configured |
| to have one. Usually, another file system is mounted over / early |
| in boot process, and therefore most tools which manipulate |
| mount table, such as df, will skip rootfs entry. |
| |
| However, some systems do not mount anything on /. |
| If you need to configure busybox for one of these systems, |
| you may find it useful to turn this option off to make df show |
| initramfs statistics. |
| |
| Otherwise, choose Y. |
| |
| config MONOTONIC_SYSCALL |
| bool "Use clock_gettime(CLOCK_MONOTONIC) syscall" |
| default n |
| select PLATFORM_LINUX |
| help |
| Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring |
| time intervals (time, ping, traceroute etc need this). |
| Probably requires Linux 2.6+. If not selected, gettimeofday |
| will be used instead (which gives wrong results if date/time |
| is reset). |
| |
| config IOCTL_HEX2STR_ERROR |
| bool "Use ioctl names rather than hex values in error messages" |
| default y |
| help |
| Use ioctl names rather than hex values in error messages |
| (e.g. VT_DISALLOCATE rather than 0x5608). If disabled this |
| saves about 1400 bytes. |
| |
| config FEATURE_HWIB |
| bool "Support infiniband HW" |
| default y |
| help |
| Support for printing infiniband addresses in |
| network applets. |
| |
| endmenu |
