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