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.
17 config MD5_SIZE_VS_SPEED
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_REVERSE_SEARCH
98 bool "Reverse history search"
100 depends on FEATURE_EDITING_SAVEHISTORY
102 Enable readline-like Ctrl-R combination for reverse history search.
103 Increases code by about 0.5k.
105 config FEATURE_TAB_COMPLETION
106 bool "Tab completion"
108 depends on FEATURE_EDITING
110 Enable tab completion.
112 config FEATURE_USERNAME_COMPLETION
113 bool "Username completion"
115 depends on FEATURE_TAB_COMPLETION
117 Enable username completion.
119 config FEATURE_EDITING_FANCY_PROMPT
120 bool "Fancy shell prompts"
122 depends on FEATURE_EDITING
124 Setting this option allows for prompts to use things like \w and
127 config FEATURE_EDITING_ASK_TERMINAL
128 bool "Query cursor position from terminal"
130 depends on FEATURE_EDITING
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.
139 config FEATURE_NON_POSIX_CP
140 bool "Non-POSIX, but safer, copying to special nodes"
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")
149 config FEATURE_VERBOSE_CP_MESSAGE
150 bool "Give more precise messages when copy fails (cp, mv etc)"
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.
163 config FEATURE_COPYBUF_KB
164 int "Copy buffer size, in kilobytes"
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.
173 config FEATURE_SKIP_ROOTFS
174 bool "Skip rootfs in mount table"
177 Ignore rootfs entry in mount table.
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.
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
192 config MONOTONIC_SYSCALL
193 bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
195 select PLATFORM_LINUX
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
203 config IOCTL_HEX2STR_ERROR
204 bool "Use ioctl names rather than hex values in error messages"
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.
212 bool "Support infiniband HW"
215 Support for printing infiniband addresses in