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Rob Landley5cf7c2d2006-02-21 06:44:43 +00001#
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
Denys Vlasenkod70e0e92010-06-08 12:15:11 +02008INSERT
9
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000010config PASSWORD_MINLEN
"Robert P. J. Day"087b9d62006-07-02 18:35:39 +000011 int "Minimum password length"
12 default 6
13 range 5 32
14 help
15 Minimum allowable password length.
16
Denys Vlasenko522041e2011-09-10 13:25:57 +020017config MD5_SMALL
Denys Vlasenko7e7e08f2009-07-06 23:24:20 +020018 int "MD5: Trade bytes for speed (0:fast, 3:slow)"
Denys Vlasenkodb700332015-10-25 20:36:03 +010019 default 1 # all "fast or small" options default to small
Rob Landley5cf7c2d2006-02-21 06:44:43 +000020 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
Denys Vlasenko30a86522013-01-15 01:12:26 +010031config SHA3_SMALL
32 int "SHA3: Trade bytes for speed (0:fast, 1:slow)"
Denys Vlasenkodb700332015-10-25 20:36:03 +010033 default 1 # all "fast or small" options default to small
Denys Vlasenko30a86522013-01-15 01:12:26 +010034 range 0 1
35 help
36 Trade binary size versus speed for the sha3sum algorithm.
37 SHA3_SMALL=0 compared to SHA3_SMALL=1 (approximate):
38 64-bit x86: +270 bytes of code, 45% faster
39 32-bit x86: +450 bytes of code, 75% faster
40
Denis Vlasenko3afac4c2007-06-19 13:46:24 +000041config FEATURE_FAST_TOP
42 bool "Faster /proc scanning code (+100 bytes)"
Denys Vlasenkodb700332015-10-25 20:36:03 +010043 default n # all "fast or small" options default to small
Denis Vlasenko3afac4c2007-06-19 13:46:24 +000044 help
45 This option makes top (and ps) ~20% faster (or 20% less CPU hungry),
46 but code size is slightly bigger.
47
Denis Vlasenkoa61cb922007-06-19 11:24:47 +000048config FEATURE_ETC_NETWORKS
49 bool "Support for /etc/networks"
50 default n
51 help
52 Enable support for network names in /etc/networks. This is
53 a rarely used feature which allows you to use names
54 instead of IP/mask pairs in route command.
55
Marek Polacekb507cc32010-10-25 03:44:34 +020056config FEATURE_USE_TERMIOS
57 bool "Use termios to manipulate the screen"
58 default y
59 depends on MORE || TOP || POWERTOP
60 help
61 This option allows utilities such as 'more' and 'top' to determine
62 the size of the screen. If you leave this disabled, your utilities
63 that display things on the screen will be especially primitive and
64 will be unable to determine the current screen size, and will be
65 unable to move the cursor.
66
Denis Vlasenko38f63192007-01-22 09:03:07 +000067config FEATURE_EDITING
68 bool "Command line editing"
Denys Vlasenko2f32bf82010-06-06 04:14:28 +020069 default y
Denis Vlasenko38f63192007-01-22 09:03:07 +000070 help
Denis Vlasenkoe8a07882007-06-10 15:08:44 +000071 Enable line editing (mainly for shell command line).
72
73config FEATURE_EDITING_MAX_LEN
74 int "Maximum length of input"
75 range 128 8192
76 default 1024
77 depends on FEATURE_EDITING
78 help
79 Line editing code uses on-stack buffers for storage.
80 You may want to decrease this parameter if your target machine
81 benefits from smaller stack usage.
Denis Vlasenko38f63192007-01-22 09:03:07 +000082
Denis Vlasenko38f63192007-01-22 09:03:07 +000083config FEATURE_EDITING_VI
84 bool "vi-style line editing commands"
85 default n
86 depends on FEATURE_EDITING
87 help
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000088 Enable vi-style line editing. In shells, this mode can be
Denis Vlasenko38f63192007-01-22 09:03:07 +000089 turned on and off with "set -o vi" and "set +o vi".
90
91config FEATURE_EDITING_HISTORY
92 int "History size"
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +020093 # Don't allow way too big values here, code uses fixed "char *history[N]" struct member
94 range 0 9999
Denys Vlasenko2f32bf82010-06-06 04:14:28 +020095 default 255
Denis Vlasenko38f63192007-01-22 09:03:07 +000096 depends on FEATURE_EDITING
97 help
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +020098 Specify command history size (0 - disable).
Denis Vlasenko38f63192007-01-22 09:03:07 +000099
100config FEATURE_EDITING_SAVEHISTORY
101 bool "History saving"
Denys Vlasenko2f32bf82010-06-06 04:14:28 +0200102 default y
Denys Vlasenko99862cb2010-09-12 17:34:13 +0200103 depends on FEATURE_EDITING
Denis Vlasenko38f63192007-01-22 09:03:07 +0000104 help
Denys Vlasenko99862cb2010-09-12 17:34:13 +0200105 Enable history saving in shells.
Denis Vlasenko38f63192007-01-22 09:03:07 +0000106
Denys Vlasenkobede2152011-09-04 16:12:33 +0200107config FEATURE_EDITING_SAVE_ON_EXIT
108 bool "Save history on shell exit, not after every command"
109 default n
110 depends on FEATURE_EDITING_SAVEHISTORY
111 help
112 Save history on shell exit, not after every command.
113
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200114config FEATURE_REVERSE_SEARCH
115 bool "Reverse history search"
116 default y
Denys Vlasenkofe0dc342015-10-30 21:39:19 +0100117 depends on FEATURE_EDITING
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200118 help
119 Enable readline-like Ctrl-R combination for reverse history search.
120 Increases code by about 0.5k.
121
Denis Vlasenko38f63192007-01-22 09:03:07 +0000122config FEATURE_TAB_COMPLETION
123 bool "Tab completion"
Denys Vlasenko2f32bf82010-06-06 04:14:28 +0200124 default y
Denis Vlasenko38f63192007-01-22 09:03:07 +0000125 depends on FEATURE_EDITING
126 help
127 Enable tab completion.
128
129config FEATURE_USERNAME_COMPLETION
130 bool "Username completion"
131 default n
132 depends on FEATURE_TAB_COMPLETION
133 help
134 Enable username completion.
135
136config FEATURE_EDITING_FANCY_PROMPT
137 bool "Fancy shell prompts"
Denys Vlasenko5d26df62010-07-16 15:31:38 +0200138 default y
Denis Vlasenko38f63192007-01-22 09:03:07 +0000139 depends on FEATURE_EDITING
140 help
141 Setting this option allows for prompts to use things like \w and
142 \$ and escape codes.
143
Denys Vlasenko020f4062009-05-17 16:44:54 +0200144config FEATURE_EDITING_ASK_TERMINAL
145 bool "Query cursor position from terminal"
146 default n
147 depends on FEATURE_EDITING
148 help
149 Allow usage of "ESC [ 6 n" sequence. Terminal answers back with
150 current cursor position. This information is used to make line
151 editing more robust in some cases.
152 If you are not sure whether your terminals respond to this code
Denys Vlasenkod83bbf42009-10-27 10:47:49 +0100153 correctly, or want to save on code size (about 400 bytes),
Denys Vlasenko020f4062009-05-17 16:44:54 +0200154 then do not turn this option on.
155
Denys Vlasenko2d7b5bf2009-07-05 12:49:29 +0200156config FEATURE_NON_POSIX_CP
157 bool "Non-POSIX, but safer, copying to special nodes"
158 default y
159 help
160 With this option, "cp file symlink" will delete symlink
161 and create a regular file. This does not conform to POSIX,
162 but prevents a symlink attack.
163 Similarly, "cp file device" will not send file's data
Denys Vlasenko2753aae2010-12-30 01:17:03 +0100164 to the device. (To do that, use "cat file >device")
Denys Vlasenko2d7b5bf2009-07-05 12:49:29 +0200165
Denis Vlasenkod5fe8802008-02-13 16:52:00 +0000166config FEATURE_VERBOSE_CP_MESSAGE
167 bool "Give more precise messages when copy fails (cp, mv etc)"
168 default n
169 help
170 Error messages with this feature enabled:
171 $ cp file /does_not_exist/file
172 cp: cannot create '/does_not_exist/file': Path does not exist
173 $ cp file /vmlinuz/file
174 cp: cannot stat '/vmlinuz/file': Path has non-directory component
175 If this feature is not enabled, they will be, respectively:
Denys Vlasenkoa68bd4b2009-10-14 11:52:01 +0200176 cp: cannot create '/does_not_exist/file': No such file or directory
Denis Vlasenkod5fe8802008-02-13 16:52:00 +0000177 cp: cannot stat '/vmlinuz/file': Not a directory
Denis Vlasenkod5fe8802008-02-13 16:52:00 +0000178 This will cost you ~60 bytes.
179
Denis Vlasenko4c139222007-12-02 03:27:42 +0000180config FEATURE_COPYBUF_KB
181 int "Copy buffer size, in kilobytes"
182 range 1 1024
183 default 4
184 help
Denys Vlasenkodf4e16c2011-02-10 06:29:06 +0100185 Size of buffer used by cp, mv, install, wget etc.
Denis Vlasenko4c139222007-12-02 03:27:42 +0000186 Buffers which are 4 kb or less will be allocated on stack.
187 Bigger buffers will be allocated with mmap, with fallback to 4 kb
188 stack buffer if mmap fails.
189
Lauri Kasanen55ae0e92011-01-31 06:27:35 +0100190config FEATURE_SKIP_ROOTFS
191 bool "Skip rootfs in mount table"
192 default y
193 help
194 Ignore rootfs entry in mount table.
195
196 In Linux, kernel has a special filesystem, rootfs, which is initially
197 mounted on /. It contains initramfs data, if kernel is configured
198 to have one. Usually, another file system is mounted over / early
199 in boot process, and therefore most tools which manipulate
200 mount table, such as df, will skip rootfs entry.
201
202 However, some systems do not mount anything on /.
203 If you need to configure busybox for one of these systems,
Bernhard Reutner-Fischer74b871f2011-06-15 21:00:18 +0200204 you may find it useful to turn this option off to make df show
205 initramfs statistics.
Lauri Kasanen55ae0e92011-01-31 06:27:35 +0100206
207 Otherwise, choose Y.
208
Denis Vlasenko459be352007-06-17 19:09:05 +0000209config MONOTONIC_SYSCALL
210 bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
Denys Vlasenkodb700332015-10-25 20:36:03 +0100211 default y
Denys Vlasenkoe3b1a1f2011-02-26 22:24:08 +0100212 select PLATFORM_LINUX
Denis Vlasenko459be352007-06-17 19:09:05 +0000213 help
214 Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring
215 time intervals (time, ping, traceroute etc need this).
216 Probably requires Linux 2.6+. If not selected, gettimeofday
217 will be used instead (which gives wrong results if date/time
218 is reset).
219
Denis Vlasenkofb79a2e2007-07-14 22:07:14 +0000220config IOCTL_HEX2STR_ERROR
221 bool "Use ioctl names rather than hex values in error messages"
222 default y
223 help
224 Use ioctl names rather than hex values in error messages
225 (e.g. VT_DISALLOCATE rather than 0x5608). If disabled this
226 saves about 1400 bytes.
Bernhard Reutner-Fischerf3b778a2008-05-16 16:10:31 +0000227
228config FEATURE_HWIB
229 bool "Support infiniband HW"
230 default y
231 help
232 Support for printing infiniband addresses in
233 network applets.
Denys Vlasenkobcbd37d2009-06-18 13:23:58 +0200234
Rob Landley5cf7c2d2006-02-21 06:44:43 +0000235endmenu