package/utils/busybox/config/libbb/Config.in

   1 # DO NOT EDIT. This file is generated from Config.src
   2 #
   3 # For a description of the syntax of this configuration file,
   4 # see scripts/kbuild/config-language.txt.
   5 #
   6
   7 menu "Busybox Library Tuning"
   8
   9 config BUSYBOX_CONFIG_FEATURE_USE_BSS_TAIL
  10         bool "Use the end of BSS page"
  11         default BUSYBOX_DEFAULT_FEATURE_USE_BSS_TAIL
  12         help
  13           Attempt to reclaim a small unused part of BSS.
  14
  15           Executables have the following parts:
  16           = read-only executable code and constants, also known as "text"
  17           = read-write data
  18           = non-initialized (zeroed on demand) data, also known as "bss"
  19
  20           At link time, "text" is padded to a full page. At runtime, all "text"
  21           pages are mapped RO and executable.
  22           "Data" starts on the next page boundary, but is not padded
  23           to a full page at the end. "Bss" starts wherever "data" ends.
  24           At runtime, "data" pages are mapped RW and they are file-backed
  25           (this includes a small portion of "bss" which may live in the last
  26           partial page of "data").
  27           Pages which are fully in "bss" are mapped to anonymous memory.
  28
  29           "Bss" end is usually not page-aligned. There is an unused space
  30           in the last page. Linker marks its start with the "_end" symbol.
  31
  32           This option will attempt to use that space for bb_common_bufsiz1[]
  33           array. If it fits after _end, it will be used, and COMMON_BUFSIZE
  34           will be enlarged from its guaranteed minimum size of 1 kbyte.
  35           This may require recompilation a second time, since value of _end
  36           is known only after final link.
  37
  38           If you are getting a build error like this:
  39                 appletlib.c:(.text.main+0xd): undefined reference to '_end'
  40           disable this option.
  41 config BUSYBOX_CONFIG_FEATURE_RTMINMAX
  42         bool "Support RTMIN[+n] and RTMAX[-n] signal names"
  43         default BUSYBOX_DEFAULT_FEATURE_RTMINMAX
  44         help
  45           Support RTMIN[+n] and RTMAX[-n] signal names
  46           in kill, killall etc. This costs ~250 bytes.
  47
  48 config BUSYBOX_CONFIG_PASSWORD_MINLEN
  49         int "Minimum password length"
  50         default BUSYBOX_DEFAULT_PASSWORD_MINLEN
  51         range 5 32
  52         help
  53           Minimum allowable password length.
  54
  55 config BUSYBOX_CONFIG_MD5_SMALL
  56         int "MD5: Trade bytes for speed (0:fast, 3:slow)"
  57         default BUSYBOX_DEFAULT_MD5_SMALL  # all "fast or small" options default to small
  58         range 0 3
  59         help
  60           Trade binary size versus speed for the md5sum algorithm.
  61           Approximate values running uClibc and hashing
  62           linux-2.4.4.tar.bz2 were:
  63                             user times (sec)  text size (386)
  64           0 (fastest)         1.1                6144
  65           1                   1.4                5392
  66           2                   3.0                5088
  67           3 (smallest)        5.1                4912
  68
  69 config BUSYBOX_CONFIG_SHA3_SMALL
  70         int "SHA3: Trade bytes for speed (0:fast, 1:slow)"
  71         default BUSYBOX_DEFAULT_SHA3_SMALL  # all "fast or small" options default to small
  72         range 0 1
  73         help
  74           Trade binary size versus speed for the sha3sum algorithm.
  75           SHA3_SMALL=0 compared to SHA3_SMALL=1 (approximate):
  76           64-bit x86: +270 bytes of code, 45% faster
  77           32-bit x86: +450 bytes of code, 75% faster
  78
  79 config BUSYBOX_CONFIG_FEATURE_FAST_TOP
  80         bool "Faster /proc scanning code (+100 bytes)"
  81         default BUSYBOX_DEFAULT_FEATURE_FAST_TOP  # all "fast or small" options default to small
  82         help
  83           This option makes top (and ps) ~20% faster (or 20% less CPU hungry),
  84           but code size is slightly bigger.
  85
  86 config BUSYBOX_CONFIG_FEATURE_ETC_NETWORKS
  87         bool "Support for /etc/networks"
  88         default BUSYBOX_DEFAULT_FEATURE_ETC_NETWORKS
  89         help
  90           Enable support for network names in /etc/networks. This is
  91           a rarely used feature which allows you to use names
  92           instead of IP/mask pairs in route command.
  93
  94 config BUSYBOX_CONFIG_FEATURE_USE_TERMIOS
  95         bool "Use termios to manipulate the screen"
  96         default BUSYBOX_DEFAULT_FEATURE_USE_TERMIOS
  97         depends on BUSYBOX_CONFIG_MORE || BUSYBOX_CONFIG_TOP || BUSYBOX_CONFIG_POWERTOP
  98         help
  99           This option allows utilities such as 'more' and 'top' to determine
 100           the size of the screen. If you leave this disabled, your utilities
 101           that display things on the screen will be especially primitive and
 102           will be unable to determine the current screen size, and will be
 103           unable to move the cursor.
 104
 105 config BUSYBOX_CONFIG_FEATURE_EDITING
 106         bool "Command line editing"
 107         default BUSYBOX_DEFAULT_FEATURE_EDITING
 108         help
 109           Enable line editing (mainly for shell command line).
 110
 111 config BUSYBOX_CONFIG_FEATURE_EDITING_MAX_LEN
 112         int "Maximum length of input"
 113         range 128 8192
 114         default BUSYBOX_DEFAULT_FEATURE_EDITING_MAX_LEN
 115         depends on BUSYBOX_CONFIG_FEATURE_EDITING
 116         help
 117           Line editing code uses on-stack buffers for storage.
 118           You may want to decrease this parameter if your target machine
 119           benefits from smaller stack usage.
 120
 121 config BUSYBOX_CONFIG_FEATURE_EDITING_VI
 122         bool "vi-style line editing commands"
 123         default BUSYBOX_DEFAULT_FEATURE_EDITING_VI
 124         depends on BUSYBOX_CONFIG_FEATURE_EDITING
 125         help
 126           Enable vi-style line editing. In shells, this mode can be
 127           turned on and off with "set -o vi" and "set +o vi".
 128
 129 config BUSYBOX_CONFIG_FEATURE_EDITING_HISTORY
 130         int "History size"
 131         # Don't allow way too big values here, code uses fixed "char *history[N]" struct member
 132         range 0 9999
 133         default BUSYBOX_DEFAULT_FEATURE_EDITING_HISTORY
 134         depends on BUSYBOX_CONFIG_FEATURE_EDITING
 135         help
 136           Specify command history size (0 - disable).
 137
 138 config BUSYBOX_CONFIG_FEATURE_EDITING_SAVEHISTORY
 139         bool "History saving"
 140         default BUSYBOX_DEFAULT_FEATURE_EDITING_SAVEHISTORY
 141         depends on BUSYBOX_CONFIG_FEATURE_EDITING
 142         help
 143           Enable history saving in shells.
 144
 145 config BUSYBOX_CONFIG_FEATURE_EDITING_SAVE_ON_EXIT
 146         bool "Save history on shell exit, not after every command"
 147         default BUSYBOX_DEFAULT_FEATURE_EDITING_SAVE_ON_EXIT
 148         depends on BUSYBOX_CONFIG_FEATURE_EDITING_SAVEHISTORY
 149         help
 150           Save history on shell exit, not after every command.
 151
 152 config BUSYBOX_CONFIG_FEATURE_REVERSE_SEARCH
 153         bool "Reverse history search"
 154         default BUSYBOX_DEFAULT_FEATURE_REVERSE_SEARCH
 155         depends on BUSYBOX_CONFIG_FEATURE_EDITING
 156         help
 157           Enable readline-like Ctrl-R combination for reverse history search.
 158           Increases code by about 0.5k.
 159
 160 config BUSYBOX_CONFIG_FEATURE_TAB_COMPLETION
 161         bool "Tab completion"
 162         default BUSYBOX_DEFAULT_FEATURE_TAB_COMPLETION
 163         depends on BUSYBOX_CONFIG_FEATURE_EDITING
 164         help
 165           Enable tab completion.
 166
 167 config BUSYBOX_CONFIG_FEATURE_USERNAME_COMPLETION
 168         bool "Username completion"
 169         default BUSYBOX_DEFAULT_FEATURE_USERNAME_COMPLETION
 170         depends on BUSYBOX_CONFIG_FEATURE_TAB_COMPLETION
 171         help
 172           Enable username completion.
 173
 174 config BUSYBOX_CONFIG_FEATURE_EDITING_FANCY_PROMPT
 175         bool "Fancy shell prompts"
 176         default BUSYBOX_DEFAULT_FEATURE_EDITING_FANCY_PROMPT
 177         depends on BUSYBOX_CONFIG_FEATURE_EDITING
 178         help
 179           Setting this option allows for prompts to use things like \w and
 180           \$ and escape codes.
 181
 182 config BUSYBOX_CONFIG_FEATURE_EDITING_ASK_TERMINAL
 183         bool "Query cursor position from terminal"
 184         default BUSYBOX_DEFAULT_FEATURE_EDITING_ASK_TERMINAL
 185         depends on BUSYBOX_CONFIG_FEATURE_EDITING
 186         help
 187           Allow usage of "ESC [ 6 n" sequence. Terminal answers back with
 188           current cursor position. This information is used to make line
 189           editing more robust in some cases.
 190           If you are not sure whether your terminals respond to this code
 191           correctly, or want to save on code size (about 400 bytes),
 192           then do not turn this option on.
 193
 194 config BUSYBOX_CONFIG_FEATURE_NON_POSIX_CP
 195         bool "Non-POSIX, but safer, copying to special nodes"
 196         default BUSYBOX_DEFAULT_FEATURE_NON_POSIX_CP
 197         help
 198           With this option, "cp file symlink" will delete symlink
 199           and create a regular file. This does not conform to POSIX,
 200           but prevents a symlink attack.
 201           Similarly, "cp file device" will not send file's data
 202           to the device. (To do that, use "cat file >device")
 203
 204 config BUSYBOX_CONFIG_FEATURE_VERBOSE_CP_MESSAGE
 205         bool "Give more precise messages when copy fails (cp, mv etc)"
 206         default BUSYBOX_DEFAULT_FEATURE_VERBOSE_CP_MESSAGE
 207         help
 208           Error messages with this feature enabled:
 209             $ cp file /does_not_exist/file
 210             cp: cannot create '/does_not_exist/file': Path does not exist
 211             $ cp file /vmlinuz/file
 212             cp: cannot stat '/vmlinuz/file': Path has non-directory component
 213           If this feature is not enabled, they will be, respectively:
 214             cp: cannot create '/does_not_exist/file': No such file or directory
 215             cp: cannot stat '/vmlinuz/file': Not a directory
 216           This will cost you ~60 bytes.
 217
 218 config BUSYBOX_CONFIG_FEATURE_COPYBUF_KB
 219         int "Copy buffer size, in kilobytes"
 220         range 1 1024
 221         default BUSYBOX_DEFAULT_FEATURE_COPYBUF_KB
 222         help
 223           Size of buffer used by cp, mv, install, wget etc.
 224           Buffers which are 4 kb or less will be allocated on stack.
 225           Bigger buffers will be allocated with mmap, with fallback to 4 kb
 226           stack buffer if mmap fails.
 227
 228 config BUSYBOX_CONFIG_FEATURE_SKIP_ROOTFS
 229         bool "Skip rootfs in mount table"
 230         default BUSYBOX_DEFAULT_FEATURE_SKIP_ROOTFS
 231         help
 232           Ignore rootfs entry in mount table.
 233
 234           In Linux, kernel has a special filesystem, rootfs, which is initially
 235           mounted on /. It contains initramfs data, if kernel is configured
 236           to have one. Usually, another file system is mounted over / early
 237           in boot process, and therefore most tools which manipulate
 238           mount table, such as df, will skip rootfs entry.
 239
 240           However, some systems do not mount anything on /.
 241           If you need to configure busybox for one of these systems,
 242           you may find it useful to turn this option off to make df show
 243           initramfs statistics.
 244
 245           Otherwise, choose Y.
 246
 247 config BUSYBOX_CONFIG_MONOTONIC_SYSCALL
 248         bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
 249         default BUSYBOX_DEFAULT_MONOTONIC_SYSCALL
 250         select BUSYBOX_CONFIG_PLATFORM_LINUX
 251         help
 252           Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring
 253           time intervals (time, ping, traceroute etc need this).
 254           Probably requires Linux 2.6+. If not selected, gettimeofday
 255           will be used instead (which gives wrong results if date/time
 256           is reset).
 257
 258 config BUSYBOX_CONFIG_IOCTL_HEX2STR_ERROR
 259         bool "Use ioctl names rather than hex values in error messages"
 260         default BUSYBOX_DEFAULT_IOCTL_HEX2STR_ERROR
 261         help
 262           Use ioctl names rather than hex values in error messages
 263           (e.g. VT_DISALLOCATE rather than 0x5608). If disabled this
 264           saves about 1400 bytes.
 265
 266 config BUSYBOX_CONFIG_FEATURE_HWIB
 267         bool "Support infiniband HW"
 268         default BUSYBOX_DEFAULT_FEATURE_HWIB
 269         help
 270           Support for printing infiniband addresses in
 271           network applets.
 272
 273 endmenu