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_TAB_COMPLETION
100 depends on FEATURE_EDITING
102 Enable tab completion.
104 config FEATURE_USERNAME_COMPLETION
105 bool "Username completion"
107 depends on FEATURE_TAB_COMPLETION
109 Enable username completion.
111 config FEATURE_EDITING_FANCY_PROMPT
112 bool "Fancy shell prompts"
114 depends on FEATURE_EDITING
116 Setting this option allows for prompts to use things like \w and
119 config FEATURE_EDITING_ASK_TERMINAL
120 bool "Query cursor position from terminal"
122 depends on FEATURE_EDITING
124 Allow usage of "ESC [ 6 n" sequence. Terminal answers back with
125 current cursor position. This information is used to make line
126 editing more robust in some cases.
127 If you are not sure whether your terminals respond to this code
128 correctly, or want to save on code size (about 400 bytes),
129 then do not turn this option on.
131 config FEATURE_NON_POSIX_CP
132 bool "Non-POSIX, but safer, copying to special nodes"
135 With this option, "cp file symlink" will delete symlink
136 and create a regular file. This does not conform to POSIX,
137 but prevents a symlink attack.
138 Similarly, "cp file device" will not send file's data
139 to the device. (To do that, use "cat file >device")
141 config FEATURE_VERBOSE_CP_MESSAGE
142 bool "Give more precise messages when copy fails (cp, mv etc)"
145 Error messages with this feature enabled:
146 $ cp file /does_not_exist/file
147 cp: cannot create '/does_not_exist/file': Path does not exist
148 $ cp file /vmlinuz/file
149 cp: cannot stat '/vmlinuz/file': Path has non-directory component
150 If this feature is not enabled, they will be, respectively:
151 cp: cannot create '/does_not_exist/file': No such file or directory
152 cp: cannot stat '/vmlinuz/file': Not a directory
153 This will cost you ~60 bytes.
155 config FEATURE_COPYBUF_KB
156 int "Copy buffer size, in kilobytes"
160 Size of buffer used by cp, mv, install, wget etc.
161 Buffers which are 4 kb or less will be allocated on stack.
162 Bigger buffers will be allocated with mmap, with fallback to 4 kb
163 stack buffer if mmap fails.
165 config FEATURE_SKIP_ROOTFS
166 bool "Skip rootfs in mount table"
169 Ignore rootfs entry in mount table.
171 In Linux, kernel has a special filesystem, rootfs, which is initially
172 mounted on /. It contains initramfs data, if kernel is configured
173 to have one. Usually, another file system is mounted over / early
174 in boot process, and therefore most tools which manipulate
175 mount table, such as df, will skip rootfs entry.
177 However, some systems do not mount anything on /.
178 If you need to configure busybox for one of these systems,
179 you may find useful to turn this option off to make df show
184 config MONOTONIC_SYSCALL
185 bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
187 select PLATFORM_LINUX
189 Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring
190 time intervals (time, ping, traceroute etc need this).
191 Probably requires Linux 2.6+. If not selected, gettimeofday
192 will be used instead (which gives wrong results if date/time
195 config IOCTL_HEX2STR_ERROR
196 bool "Use ioctl names rather than hex values in error messages"
199 Use ioctl names rather than hex values in error messages
200 (e.g. VT_DISALLOCATE rather than 0x5608). If disabled this
201 saves about 1400 bytes.
204 bool "Support infiniband HW"
207 Support for printing infiniband addresses in