2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
6 menu "Busybox Library Tuning"
10 config PASSWORD_MINLEN
11 int "Minimum password length"
15 Minimum allowable password length.
18 int "MD5: Trade bytes for speed (0:fast, 3:slow)"
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)
31 config FEATURE_FAST_TOP
32 bool "Faster /proc scanning code (+100 bytes)"
35 This option makes top (and ps) ~20% faster (or 20% less CPU hungry),
36 but code size is slightly bigger.
38 config FEATURE_ETC_NETWORKS
39 bool "Support for /etc/networks"
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.
46 config FEATURE_USE_TERMIOS
47 bool "Use termios to manipulate the screen"
49 depends on MORE || TOP || POWERTOP
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.
57 config FEATURE_EDITING
58 bool "Command line editing"
61 Enable line editing (mainly for shell command line).
63 config FEATURE_EDITING_MAX_LEN
64 int "Maximum length of input"
67 depends on FEATURE_EDITING
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.
73 config FEATURE_EDITING_VI
74 bool "vi-style line editing commands"
76 depends on FEATURE_EDITING
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".
81 config FEATURE_EDITING_HISTORY
83 # Don't allow way too big values here, code uses fixed "char *history[N]" struct member
86 depends on FEATURE_EDITING
88 Specify command history size (0 - disable).
90 config FEATURE_EDITING_SAVEHISTORY
93 depends on FEATURE_EDITING
95 Enable history saving in shells.
97 config FEATURE_EDITING_SAVE_ON_EXIT
98 bool "Save history on shell exit, not after every command"
100 depends on FEATURE_EDITING_SAVEHISTORY
102 Save history on shell exit, not after every command.
104 config FEATURE_REVERSE_SEARCH
105 bool "Reverse history search"
107 depends on FEATURE_EDITING_SAVEHISTORY
109 Enable readline-like Ctrl-R combination for reverse history search.
110 Increases code by about 0.5k.
112 config FEATURE_TAB_COMPLETION
113 bool "Tab completion"
115 depends on FEATURE_EDITING
117 Enable tab completion.
119 config FEATURE_USERNAME_COMPLETION
120 bool "Username completion"
122 depends on FEATURE_TAB_COMPLETION
124 Enable username completion.
126 config FEATURE_EDITING_FANCY_PROMPT
127 bool "Fancy shell prompts"
129 depends on FEATURE_EDITING
131 Setting this option allows for prompts to use things like \w and
134 config FEATURE_EDITING_ASK_TERMINAL
135 bool "Query cursor position from terminal"
137 depends on FEATURE_EDITING
139 Allow usage of "ESC [ 6 n" sequence. Terminal answers back with
140 current cursor position. This information is used to make line
141 editing more robust in some cases.
142 If you are not sure whether your terminals respond to this code
143 correctly, or want to save on code size (about 400 bytes),
144 then do not turn this option on.
146 config FEATURE_NON_POSIX_CP
147 bool "Non-POSIX, but safer, copying to special nodes"
150 With this option, "cp file symlink" will delete symlink
151 and create a regular file. This does not conform to POSIX,
152 but prevents a symlink attack.
153 Similarly, "cp file device" will not send file's data
154 to the device. (To do that, use "cat file >device")
156 config FEATURE_VERBOSE_CP_MESSAGE
157 bool "Give more precise messages when copy fails (cp, mv etc)"
160 Error messages with this feature enabled:
161 $ cp file /does_not_exist/file
162 cp: cannot create '/does_not_exist/file': Path does not exist
163 $ cp file /vmlinuz/file
164 cp: cannot stat '/vmlinuz/file': Path has non-directory component
165 If this feature is not enabled, they will be, respectively:
166 cp: cannot create '/does_not_exist/file': No such file or directory
167 cp: cannot stat '/vmlinuz/file': Not a directory
168 This will cost you ~60 bytes.
170 config FEATURE_COPYBUF_KB
171 int "Copy buffer size, in kilobytes"
175 Size of buffer used by cp, mv, install, wget etc.
176 Buffers which are 4 kb or less will be allocated on stack.
177 Bigger buffers will be allocated with mmap, with fallback to 4 kb
178 stack buffer if mmap fails.
180 config FEATURE_SKIP_ROOTFS
181 bool "Skip rootfs in mount table"
184 Ignore rootfs entry in mount table.
186 In Linux, kernel has a special filesystem, rootfs, which is initially
187 mounted on /. It contains initramfs data, if kernel is configured
188 to have one. Usually, another file system is mounted over / early
189 in boot process, and therefore most tools which manipulate
190 mount table, such as df, will skip rootfs entry.
192 However, some systems do not mount anything on /.
193 If you need to configure busybox for one of these systems,
194 you may find it useful to turn this option off to make df show
195 initramfs statistics.
199 config MONOTONIC_SYSCALL
200 bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
202 select PLATFORM_LINUX
204 Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring
205 time intervals (time, ping, traceroute etc need this).
206 Probably requires Linux 2.6+. If not selected, gettimeofday
207 will be used instead (which gives wrong results if date/time
210 config IOCTL_HEX2STR_ERROR
211 bool "Use ioctl names rather than hex values in error messages"
214 Use ioctl names rather than hex values in error messages
215 (e.g. VT_DISALLOCATE rather than 0x5608). If disabled this
216 saves about 1400 bytes.
219 bool "Support infiniband HW"
222 Support for printing infiniband addresses in