LXR busybox/libbb/Config.src

   1#
   2# For a description of the syntax of this configuration file,
   3# see scripts/kbuild/config-language.txt.
   4#
   5
   6menu "Busybox Library Tuning"
   7
   8INSERT
   9
  10config PASSWORD_MINLEN
  11        int "Minimum password length"
  12        default 6
  13        range 5 32
  14        help
  15          Minimum allowable password length.
  16
  17config MD5_SIZE_VS_SPEED
  18        int "MD5: Trade bytes for speed (0:fast, 3:slow)"
  19        default 2
  20        range 0 3
  21        help
  22          Trade binary size versus speed for the md5sum algorithm.
  23          Approximate values running uClibc and hashing
  24          linux-2.4.4.tar.bz2 were:
  25                            user times (sec)  text size (386)
  26          0 (fastest)         1.1                6144
  27          1                   1.4                5392
  28          2                   3.0                5088
  29          3 (smallest)        5.1                4912
  30
  31config FEATURE_FAST_TOP
  32        bool "Faster /proc scanning code (+100 bytes)"
  33        default y
  34        help
  35          This option makes top (and ps) ~20% faster (or 20% less CPU hungry),
  36          but code size is slightly bigger.
  37
  38config FEATURE_ETC_NETWORKS
  39        bool "Support for /etc/networks"
  40        default n
  41        help
  42          Enable support for network names in /etc/networks. This is
  43          a rarely used feature which allows you to use names
  44          instead of IP/mask pairs in route command.
  45
  46config FEATURE_USE_TERMIOS
  47        bool "Use termios to manipulate the screen"
  48        default y
  49        depends on MORE || TOP || POWERTOP
  50        help
  51          This option allows utilities such as 'more' and 'top' to determine
  52          the size of the screen. If you leave this disabled, your utilities
  53          that display things on the screen will be especially primitive and
  54          will be unable to determine the current screen size, and will be
  55          unable to move the cursor.
  56
  57config FEATURE_EDITING
  58        bool "Command line editing"
  59        default y
  60        help
  61          Enable line editing (mainly for shell command line).
  62
  63config FEATURE_EDITING_MAX_LEN
  64        int "Maximum length of input"
  65        range 128 8192
  66        default 1024
  67        depends on FEATURE_EDITING
  68        help
  69          Line editing code uses on-stack buffers for storage.
  70          You may want to decrease this parameter if your target machine
  71          benefits from smaller stack usage.
  72
  73config FEATURE_EDITING_VI
  74        bool "vi-style line editing commands"
  75        default n
  76        depends on FEATURE_EDITING
  77        help
  78          Enable vi-style line editing. In shells, this mode can be
  79          turned on and off with "set -o vi" and "set +o vi".
  80
  81config FEATURE_EDITING_HISTORY
  82        int "History size"
  83        # Don't allow way too big values here, code uses fixed "char *history[N]" struct member
  84        range 0 9999
  85        default 255
  86        depends on FEATURE_EDITING
  87        help
  88          Specify command history size (0 - disable).
  89
  90config FEATURE_EDITING_SAVEHISTORY
  91        bool "History saving"
  92        default y
  93        depends on FEATURE_EDITING
  94        help
  95          Enable history saving in shells.
  96
  97config FEATURE_REVERSE_SEARCH
  98        bool "Reverse history search"
  99        default y
 100        depends on FEATURE_EDITING_SAVEHISTORY
 101        help
 102          Enable readline-like Ctrl-R combination for reverse history search.
 103          Increases code by about 0.5k.
 104
 105config FEATURE_TAB_COMPLETION
 106        bool "Tab completion"
 107        default y
 108        depends on FEATURE_EDITING
 109        help
 110          Enable tab completion.
 111
 112config FEATURE_USERNAME_COMPLETION
 113        bool "Username completion"
 114        default n
 115        depends on FEATURE_TAB_COMPLETION
 116        help
 117          Enable username completion.
 118
 119config FEATURE_EDITING_FANCY_PROMPT
 120        bool "Fancy shell prompts"
 121        default y
 122        depends on FEATURE_EDITING
 123        help
 124          Setting this option allows for prompts to use things like \w and
 125          \$ and escape codes.
 126
 127config FEATURE_EDITING_ASK_TERMINAL
 128        bool "Query cursor position from terminal"
 129        default n
 130        depends on FEATURE_EDITING
 131        help
 132          Allow usage of "ESC [ 6 n" sequence. Terminal answers back with
 133          current cursor position. This information is used to make line
 134          editing more robust in some cases.
 135          If you are not sure whether your terminals respond to this code
 136          correctly, or want to save on code size (about 400 bytes),
 137          then do not turn this option on.
 138
 139config FEATURE_NON_POSIX_CP
 140        bool "Non-POSIX, but safer, copying to special nodes"
 141        default y
 142        help
 143          With this option, "cp file symlink" will delete symlink
 144          and create a regular file. This does not conform to POSIX,
 145          but prevents a symlink attack.
 146          Similarly, "cp file device" will not send file's data
 147          to the device. (To do that, use "cat file >device")
 148
 149config FEATURE_VERBOSE_CP_MESSAGE
 150        bool "Give more precise messages when copy fails (cp, mv etc)"
 151        default n
 152        help
 153          Error messages with this feature enabled:
 154            $ cp file /does_not_exist/file
 155            cp: cannot create '/does_not_exist/file': Path does not exist
 156            $ cp file /vmlinuz/file
 157            cp: cannot stat '/vmlinuz/file': Path has non-directory component
 158          If this feature is not enabled, they will be, respectively:
 159            cp: cannot create '/does_not_exist/file': No such file or directory
 160            cp: cannot stat '/vmlinuz/file': Not a directory
 161          This will cost you ~60 bytes.
 162
 163config FEATURE_COPYBUF_KB
 164        int "Copy buffer size, in kilobytes"
 165        range 1 1024
 166        default 4
 167        help
 168          Size of buffer used by cp, mv, install, wget etc.
 169          Buffers which are 4 kb or less will be allocated on stack.
 170          Bigger buffers will be allocated with mmap, with fallback to 4 kb
 171          stack buffer if mmap fails.
 172
 173config FEATURE_SKIP_ROOTFS
 174        bool "Skip rootfs in mount table"
 175        default y
 176        help
 177          Ignore rootfs entry in mount table.
 178
 179          In Linux, kernel has a special filesystem, rootfs, which is initially
 180          mounted on /. It contains initramfs data, if kernel is configured
 181          to have one. Usually, another file system is mounted over / early
 182          in boot process, and therefore most tools which manipulate
 183          mount table, such as df, will skip rootfs entry.
 184
 185          However, some systems do not mount anything on /.
 186          If you need to configure busybox for one of these systems,
 187          you may find useful to turn this option off to make df show
 188          initramfs statistic.
 189
 190          Otherwise, choose Y.
 191
 192config MONOTONIC_SYSCALL
 193        bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
 194        default n
 195        select PLATFORM_LINUX
 196        help
 197          Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring
 198          time intervals (time, ping, traceroute etc need this).
 199          Probably requires Linux 2.6+. If not selected, gettimeofday
 200          will be used instead (which gives wrong results if date/time
 201          is reset).
 202
 203config IOCTL_HEX2STR_ERROR
 204        bool "Use ioctl names rather than hex values in error messages"
 205        default y
 206        help
 207          Use ioctl names rather than hex values in error messages
 208          (e.g. VT_DISALLOCATE rather than 0x5608). If disabled this
 209          saves about 1400 bytes.
 210
 211config FEATURE_HWIB
 212        bool "Support infiniband HW"
 213        default y
 214        help
 215          Support for printing infiniband addresses in
 216          network applets.
 217
 218endmenu
 219