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authorDenys Vlasenko <vda.linux@googlemail.com>2010-06-04 20:10:51 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2010-06-04 20:10:51 +0200
commitda929a95aace0e79fbc621af2ab03c76d74d5fcb (patch)
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parente4070cb0d7586037c6fcf0f0f00d8d5b97f649d3 (diff)
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mass renaming Kbuild -> Kbuild.src, Config.in -> Config.src
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell/Config.in')
-rw-r--r--shell/Config.in396
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diff --git a/shell/Config.in b/shell/Config.in
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1#
2# For a description of the syntax of this configuration file,
3# see scripts/kbuild/config-language.txt.
4#
5
6menu "Shells"
7
8choice
9 prompt "Choose which shell is aliased to 'sh' name"
10 default FEATURE_SH_IS_NONE
11 help
12 Choose which shell you want to be executed by 'sh' alias.
13 The ash shell is the most bash compatible and full featured one.
14
15config FEATURE_SH_IS_ASH
16 select ASH
17 bool "ash"
18 depends on !NOMMU
19
20config FEATURE_SH_IS_HUSH
21 select HUSH
22 bool "hush"
23
24config FEATURE_SH_IS_NONE
25 bool "none"
26
27endchoice
28
29choice
30 prompt "Choose which shell is aliased to 'bash' name"
31 default FEATURE_BASH_IS_NONE
32 help
33 Choose which shell you want to be executed by 'bash' alias.
34 The ash shell is the most bash compatible and full featured one.
35
36 Note that selecting this option does not switch on any bash
37 compatibility code. It merely makes it possible to install
38 /bin/bash (sym)link and run scripts which start with
39 #!/bin/bash line.
40
41 Many systems use it in scripts which use bash-specific features,
42 even simple ones like $RANDOM. Without this option, busybox
43 can't be used for running them because it won't recongnize
44 "bash" as a supported applet name.
45
46config FEATURE_BASH_IS_ASH
47 select ASH
48 bool "ash"
49 depends on !NOMMU
50
51config FEATURE_BASH_IS_HUSH
52 select HUSH
53 bool "hush"
54
55config FEATURE_BASH_IS_NONE
56 bool "none"
57
58endchoice
59
60config ASH
61 bool "ash"
62 default n
63 depends on !NOMMU
64 help
65 Tha 'ash' shell adds about 60k in the default configuration and is
66 the most complete and most pedantically correct shell included with
67 busybox. This shell is actually a derivative of the Debian 'dash'
68 shell (by Herbert Xu), which was created by porting the 'ash' shell
69 (written by Kenneth Almquist) from NetBSD.
70
71config ASH_BASH_COMPAT
72 bool "bash-compatible extensions"
73 default y
74 depends on ASH
75 help
76 Enable bash-compatible extensions.
77
78config ASH_JOB_CONTROL
79 bool "Job control"
80 default y
81 depends on ASH
82 help
83 Enable job control in the ash shell.
84
85config ASH_ALIAS
86 bool "alias support"
87 default y
88 depends on ASH
89 help
90 Enable alias support in the ash shell.
91
92config ASH_GETOPTS
93 bool "Builtin getopt to parse positional parameters"
94 default n
95 depends on ASH
96 help
97 Enable getopts builtin in the ash shell.
98
99config ASH_BUILTIN_ECHO
100 bool "Builtin version of 'echo'"
101 default y
102 depends on ASH
103 help
104 Enable support for echo, builtin to ash.
105
106config ASH_BUILTIN_PRINTF
107 bool "Builtin version of 'printf'"
108 default y
109 depends on ASH
110 help
111 Enable support for printf, builtin to ash.
112
113config ASH_BUILTIN_TEST
114 bool "Builtin version of 'test'"
115 default y
116 depends on ASH
117 help
118 Enable support for test, builtin to ash.
119
120config ASH_CMDCMD
121 bool "'command' command to override shell builtins"
122 default n
123 depends on ASH
124 help
125 Enable support for the ash 'command' builtin, which allows
126 you to run the specified command with the specified arguments,
127 even when there is an ash builtin command with the same name.
128
129config ASH_MAIL
130 bool "Check for new mail on interactive shells"
131 default y
132 depends on ASH
133 help
134 Enable "check for new mail" in the ash shell.
135
136config ASH_OPTIMIZE_FOR_SIZE
137 bool "Optimize for size instead of speed"
138 default y
139 depends on ASH
140 help
141 Compile ash for reduced size at the price of speed.
142
143config ASH_RANDOM_SUPPORT
144 bool "Pseudorandom generator and $RANDOM variable"
145 default n
146 depends on ASH
147 help
148 Enable pseudorandom generator and dynamic variable "$RANDOM".
149 Each read of "$RANDOM" will generate a new pseudorandom value.
150 You can reset the generator by using a specified start value.
151 After "unset RANDOM" the generator will switch off and this
152 variable will no longer have special treatment.
153
154config ASH_EXPAND_PRMT
155 bool "Expand prompt string"
156 default n
157 depends on ASH
158 help
159 "PS#" may contain volatile content, such as backquote commands.
160 This option recreates the prompt string from the environment
161 variable each time it is displayed.
162
163config HUSH
164 bool "hush"
165 default n
166 help
167 hush is a small shell (22k). It handles the normal flow control
168 constructs such as if/then/elif/else/fi, for/in/do/done, while loops,
169 case/esac. Redirections, here documents, $((arithmetic))
170 and functions are supported.
171
172 It will compile and work on no-mmu systems.
173
174 It does not handle select, aliases, brace expansion,
175 tilde expansion, &>file and >&file redirection of stdout+stderr.
176
177config HUSH_BASH_COMPAT
178 bool "bash-compatible extensions"
179 default y
180 depends on HUSH
181 help
182 Enable bash-compatible extensions.
183
184config HUSH_HELP
185 bool "help builtin"
186 default n
187 depends on HUSH
188 help
189 Enable help builtin in hush. Code size + ~1 kbyte.
190
191config HUSH_INTERACTIVE
192 bool "Interactive mode"
193 default y
194 depends on HUSH
195 help
196 Enable interactive mode (prompt and command editing).
197 Without this, hush simply reads and executes commands
198 from stdin just like a shell script from a file.
199 No prompt, no PS1/PS2 magic shell variables.
200
201config HUSH_JOB
202 bool "Job control"
203 default n
204 depends on HUSH_INTERACTIVE
205 help
206 Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current
207 command (not entire shell), fg/bg builtins work. Without this option,
208 "cmd &" still works by simply spawning a process and immediately
209 prompting for next command (or executing next command in a script),
210 but no separate process group is formed.
211
212config HUSH_TICK
213 bool "Process substitution"
214 default n
215 depends on HUSH
216 help
217 Enable process substitution `command` and $(command) in hush.
218
219config HUSH_IF
220 bool "Support if/then/elif/else/fi"
221 default n
222 depends on HUSH
223 help
224 Enable if/then/elif/else/fi in hush.
225
226config HUSH_LOOPS
227 bool "Support for, while and until loops"
228 default n
229 depends on HUSH
230 help
231 Enable for, while and until loops in hush.
232
233config HUSH_CASE
234 bool "Support case ... esac statement"
235 default n
236 depends on HUSH
237 help
238 Enable case ... esac statement in hush. +400 bytes.
239
240config HUSH_FUNCTIONS
241 bool "Support funcname() { commands; } syntax"
242 default n
243 depends on HUSH
244 help
245 Enable support for shell functions in hush. +800 bytes.
246
247config HUSH_LOCAL
248 bool "Support local builtin"
249 default n
250 depends on HUSH_FUNCTIONS
251 help
252 Enable support for local variables in functions.
253
254config HUSH_EXPORT_N
255 bool "Support export '-n' option"
256 default n
257 depends on HUSH
258 help
259 Enable support for export '-n' option in hush. It is a bash extension.
260
261config HUSH_RANDOM_SUPPORT
262 bool "Pseudorandom generator and $RANDOM variable"
263 default n
264 depends on HUSH
265 help
266 Enable pseudorandom generator and dynamic variable "$RANDOM".
267 Each read of "$RANDOM" will generate a new pseudorandom value.
268
269config LASH
270 bool "lash (deprecated: aliased to hush)"
271 default n
272 select HUSH
273 help
274 lash is deprecated and will be removed, please migrate to hush.
275
276config MSH
277 bool "msh (deprecated: please use hush)"
278 default n
279 select HUSH
280 help
281 msh is deprecated and will be removed, please migrate to hush.
282 If there is a feature msh has but hush does not, please let us know.
283
284# The minix shell (adds just 30k) is quite complete and handles things
285# like for/do/done, case/esac and all the things you expect a Bourne
286# shell to do. It is not always pedantically correct about Bourne
287# shell grammar (try running the shell testscript "tests/sh.testcases"
288# on it and compare vs bash) but for most things it works quite well.
289# It uses only vfork, so it can be used on uClinux systems.
290
291
292config SH_MATH_SUPPORT
293 bool "POSIX math support"
294 default y
295 depends on ASH || HUSH
296 help
297 Enable math support in the shell via $((...)) syntax.
298
299config SH_MATH_SUPPORT_64
300 bool "Extend POSIX math support to 64 bit"
301 default n
302 depends on SH_MATH_SUPPORT
303 help
304 Enable 64-bit math support in the shell. This will make the shell
305 slightly larger, but will allow computation with very large numbers.
306 This is not in POSIX, so do not rely on this in portable code.
307
308config FEATURE_SH_EXTRA_QUIET
309 bool "Hide message on interactive shell startup"
310 default n
311 depends on MSH || LASH || HUSH || ASH
312 help
313 Remove the busybox introduction when starting a shell.
314
315config FEATURE_SH_STANDALONE
316 bool "Standalone shell"
317 default n
318 depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS
319 help
320 This option causes busybox shells to use busybox applets
321 in preference to executables in the PATH whenever possible. For
322 example, entering the command 'ifconfig' into the shell would cause
323 busybox to use the ifconfig busybox applet. Specifying the fully
324 qualified executable name, such as '/sbin/ifconfig' will still
325 execute the /sbin/ifconfig executable on the filesystem. This option
326 is generally used when creating a statically linked version of busybox
327 for use as a rescue shell, in the event that you screw up your system.
328
329 This is implemented by re-execing /proc/self/exe (typically)
330 with right parameters. Some selected applets ("NOFORK" applets)
331 can even be executed without creating new process.
332 Instead, busybox will call <applet>_main() internally.
333
334 However, this causes problems in chroot jails without mounted /proc
335 and with ps/top (command name can be shown as 'exe' for applets
336 started this way).
337# untrue?
338# Note that this will *also* cause applets to take precedence
339# over shell builtins of the same name. So turning this on will
340# eliminate any performance gained by turning on the builtin "echo"
341# and "test" commands in ash.
342# untrue?
343# Note that when using this option, the shell will attempt to directly
344# run '/bin/busybox'. If you do not have the busybox binary sitting in
345# that exact location with that exact name, this option will not work at
346# all.
347
348config FEATURE_SH_NOFORK
349 bool "Run 'nofork' applets directly"
350 default n
351 depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS
352 help
353 This option causes busybox shells [currently only ash]
354 to not execute typical fork/exec/wait sequence, but call <applet>_main
355 directly, if possible. (Sometimes it is not possible: for example,
356 this is not possible in pipes).
357
358 This will be done only for some applets (those which are marked
359 NOFORK in include/applets.h).
360
361 This may significantly speed up some shell scripts.
362
363 This feature is relatively new. Use with care.
364
365config CTTYHACK
366 bool "cttyhack"
367 default n
368 help
369 One common problem reported on the mailing list is "can't access tty;
370 job control turned off" error message which typically appears when
371 one tries to use shell with stdin/stdout opened to /dev/console.
372 This device is special - it cannot be a controlling tty.
373
374 Proper solution is to use correct device instead of /dev/console.
375
376 cttyhack provides "quick and dirty" solution to this problem.
377 It analyzes stdin with various ioctls, trying to determine whether
378 it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line).
379 If it detects one, it closes stdin/out/err and reopens that device.
380 Then it executes given program. Opening the device will make
381 that device a controlling tty. This may require cttyhack
382 to be a session leader.
383
384 Example for /etc/inittab (for busybox init):
385
386 ::respawn:/bin/cttyhack /bin/sh
387
388 Giving controlling tty to shell running with PID 1:
389
390 $ exec cttyhack sh
391
392 Starting an interactive shell from boot shell script:
393
394 setsid cttyhack sh
395
396endmenu