Annotation of /tags/mkinitrd-6_2_2/busybox/shell/Config.in
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Sun May 30 11:32:42 2010 UTC (14 years, 1 month ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/shell/Config.in
File size: 10318 byte(s)
Sun May 30 11:32:42 2010 UTC (14 years, 1 month ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/shell/Config.in
File size: 10318 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | niro | 532 | # |
2 | # For a description of the syntax of this configuration file, | ||
3 | # see scripts/kbuild/config-language.txt. | ||
4 | # | ||
5 | |||
6 | menu "Shells" | ||
7 | |||
8 | choice | ||
9 | prompt "Choose your default shell" | ||
10 | default FEATURE_SH_IS_NONE | ||
11 | help | ||
12 | Choose a shell. The ash shell is the most bash compatible | ||
13 | and full featured one. | ||
14 | |||
15 | config FEATURE_SH_IS_ASH | ||
16 | select ASH | ||
17 | bool "ash" | ||
18 | niro | 984 | depends on !NOMMU |
19 | niro | 532 | |
20 | config FEATURE_SH_IS_HUSH | ||
21 | select HUSH | ||
22 | bool "hush" | ||
23 | |||
24 | niro | 816 | ####config FEATURE_SH_IS_LASH |
25 | #### select LASH | ||
26 | #### bool "lash" | ||
27 | niro | 532 | |
28 | niro | 984 | ####config FEATURE_SH_IS_MSH |
29 | #### select MSH | ||
30 | #### bool "msh" | ||
31 | niro | 532 | |
32 | config FEATURE_SH_IS_NONE | ||
33 | bool "none" | ||
34 | |||
35 | endchoice | ||
36 | |||
37 | config ASH | ||
38 | bool "ash" | ||
39 | default n | ||
40 | niro | 984 | depends on !NOMMU |
41 | niro | 532 | help |
42 | Tha 'ash' shell adds about 60k in the default configuration and is | ||
43 | the most complete and most pedantically correct shell included with | ||
44 | niro | 816 | busybox. This shell is actually a derivative of the Debian 'dash' |
45 | niro | 532 | shell (by Herbert Xu), which was created by porting the 'ash' shell |
46 | (written by Kenneth Almquist) from NetBSD. | ||
47 | |||
48 | niro | 816 | config ASH_BASH_COMPAT |
49 | bool "bash-compatible extensions" | ||
50 | default y | ||
51 | depends on ASH | ||
52 | help | ||
53 | Enable bash-compatible extensions. | ||
54 | |||
55 | niro | 532 | config ASH_JOB_CONTROL |
56 | bool "Job control" | ||
57 | default y | ||
58 | depends on ASH | ||
59 | help | ||
60 | Enable job control in the ash shell. | ||
61 | |||
62 | config ASH_ALIAS | ||
63 | bool "alias support" | ||
64 | default y | ||
65 | depends on ASH | ||
66 | help | ||
67 | Enable alias support in the ash shell. | ||
68 | |||
69 | config ASH_GETOPTS | ||
70 | bool "Builtin getopt to parse positional parameters" | ||
71 | default n | ||
72 | depends on ASH | ||
73 | help | ||
74 | Enable getopts builtin in the ash shell. | ||
75 | |||
76 | config ASH_BUILTIN_ECHO | ||
77 | bool "Builtin version of 'echo'" | ||
78 | default y | ||
79 | depends on ASH | ||
80 | help | ||
81 | niro | 816 | Enable support for echo, builtin to ash. |
82 | niro | 532 | |
83 | niro | 816 | config ASH_BUILTIN_PRINTF |
84 | bool "Builtin version of 'printf'" | ||
85 | default y | ||
86 | depends on ASH | ||
87 | help | ||
88 | Enable support for printf, builtin to ash. | ||
89 | |||
90 | niro | 532 | config ASH_BUILTIN_TEST |
91 | bool "Builtin version of 'test'" | ||
92 | default y | ||
93 | depends on ASH | ||
94 | help | ||
95 | niro | 816 | Enable support for test, builtin to ash. |
96 | niro | 532 | |
97 | config ASH_CMDCMD | ||
98 | bool "'command' command to override shell builtins" | ||
99 | default n | ||
100 | depends on ASH | ||
101 | help | ||
102 | Enable support for the ash 'command' builtin, which allows | ||
103 | you to run the specified command with the specified arguments, | ||
104 | even when there is an ash builtin command with the same name. | ||
105 | |||
106 | config ASH_MAIL | ||
107 | bool "Check for new mail on interactive shells" | ||
108 | default y | ||
109 | depends on ASH | ||
110 | help | ||
111 | Enable "check for new mail" in the ash shell. | ||
112 | |||
113 | config ASH_OPTIMIZE_FOR_SIZE | ||
114 | bool "Optimize for size instead of speed" | ||
115 | default y | ||
116 | depends on ASH | ||
117 | help | ||
118 | Compile ash for reduced size at the price of speed. | ||
119 | |||
120 | config ASH_RANDOM_SUPPORT | ||
121 | niro | 984 | bool "Pseudorandom generator and $RANDOM variable" |
122 | niro | 532 | default n |
123 | depends on ASH | ||
124 | help | ||
125 | Enable pseudorandom generator and dynamic variable "$RANDOM". | ||
126 | Each read of "$RANDOM" will generate a new pseudorandom value. | ||
127 | You can reset the generator by using a specified start value. | ||
128 | niro | 984 | After "unset RANDOM" the generator will switch off and this |
129 | niro | 532 | variable will no longer have special treatment. |
130 | |||
131 | config ASH_EXPAND_PRMT | ||
132 | bool "Expand prompt string" | ||
133 | default n | ||
134 | depends on ASH | ||
135 | help | ||
136 | niro | 984 | "PS#" may contain volatile content, such as backquote commands. |
137 | niro | 532 | This option recreates the prompt string from the environment |
138 | variable each time it is displayed. | ||
139 | |||
140 | config HUSH | ||
141 | bool "hush" | ||
142 | default n | ||
143 | help | ||
144 | niro | 984 | hush is a small shell (22k). It handles the normal flow control |
145 | constructs such as if/then/elif/else/fi, for/in/do/done, while loops, | ||
146 | case/esac. Redirections, here documents, $((arithmetic)) | ||
147 | and functions are supported. | ||
148 | niro | 532 | |
149 | niro | 984 | It will compile and work on no-mmu systems. |
150 | niro | 816 | |
151 | niro | 984 | It does not handle select, aliases, brace expansion, |
152 | tilde expansion, &>file and >&file redirection of stdout+stderr. | ||
153 | niro | 532 | |
154 | niro | 984 | config HUSH_BASH_COMPAT |
155 | bool "bash-compatible extensions" | ||
156 | default y | ||
157 | depends on HUSH | ||
158 | help | ||
159 | Enable bash-compatible extensions. | ||
160 | |||
161 | niro | 816 | config HUSH_HELP |
162 | bool "help builtin" | ||
163 | default n | ||
164 | depends on HUSH | ||
165 | help | ||
166 | Enable help builtin in hush. Code size + ~1 kbyte. | ||
167 | niro | 532 | |
168 | niro | 816 | config HUSH_INTERACTIVE |
169 | bool "Interactive mode" | ||
170 | default y | ||
171 | depends on HUSH | ||
172 | help | ||
173 | Enable interactive mode (prompt and command editing). | ||
174 | Without this, hush simply reads and executes commands | ||
175 | niro | 984 | from stdin just like a shell script from a file. |
176 | niro | 816 | No prompt, no PS1/PS2 magic shell variables. |
177 | |||
178 | config HUSH_JOB | ||
179 | bool "Job control" | ||
180 | default n | ||
181 | depends on HUSH_INTERACTIVE | ||
182 | help | ||
183 | Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current | ||
184 | command (not entire shell), fg/bg builtins work. Without this option, | ||
185 | "cmd &" still works by simply spawning a process and immediately | ||
186 | prompting for next command (or executing next command in a script), | ||
187 | but no separate process group is formed. | ||
188 | |||
189 | config HUSH_TICK | ||
190 | bool "Process substitution" | ||
191 | default n | ||
192 | depends on HUSH | ||
193 | help | ||
194 | Enable process substitution `command` and $(command) in hush. | ||
195 | |||
196 | config HUSH_IF | ||
197 | bool "Support if/then/elif/else/fi" | ||
198 | default n | ||
199 | depends on HUSH | ||
200 | help | ||
201 | Enable if/then/elif/else/fi in hush. | ||
202 | |||
203 | config HUSH_LOOPS | ||
204 | bool "Support for, while and until loops" | ||
205 | default n | ||
206 | depends on HUSH | ||
207 | help | ||
208 | Enable for, while and until loops in hush. | ||
209 | |||
210 | config HUSH_CASE | ||
211 | bool "Support case ... esac statement" | ||
212 | default n | ||
213 | depends on HUSH | ||
214 | help | ||
215 | Enable case ... esac statement in hush. +400 bytes. | ||
216 | |||
217 | niro | 984 | config HUSH_FUNCTIONS |
218 | bool "Support funcname() { commands; } syntax" | ||
219 | default n | ||
220 | depends on HUSH | ||
221 | help | ||
222 | Enable support for shell functions in hush. +800 bytes. | ||
223 | |||
224 | config HUSH_LOCAL | ||
225 | bool "Support local builtin" | ||
226 | default n | ||
227 | depends on HUSH_FUNCTIONS | ||
228 | help | ||
229 | Enable support for local variables in functions. | ||
230 | |||
231 | config HUSH_EXPORT_N | ||
232 | bool "Support export '-n' option" | ||
233 | default n | ||
234 | depends on HUSH | ||
235 | help | ||
236 | Enable support for export '-n' option in hush. It is a bash extension. | ||
237 | |||
238 | config HUSH_RANDOM_SUPPORT | ||
239 | bool "Pseudorandom generator and $RANDOM variable" | ||
240 | default n | ||
241 | depends on HUSH | ||
242 | help | ||
243 | Enable pseudorandom generator and dynamic variable "$RANDOM". | ||
244 | Each read of "$RANDOM" will generate a new pseudorandom value. | ||
245 | |||
246 | niro | 532 | config LASH |
247 | niro | 984 | bool "lash (deprecated: aliased to hush)" |
248 | niro | 532 | default n |
249 | niro | 816 | select HUSH |
250 | niro | 532 | help |
251 | niro | 816 | lash is deprecated and will be removed, please migrate to hush. |
252 | niro | 532 | |
253 | config MSH | ||
254 | niro | 984 | bool "msh (deprecated: please use hush)" |
255 | niro | 532 | default n |
256 | niro | 984 | select HUSH |
257 | niro | 532 | help |
258 | niro | 984 | msh is deprecated and will be removed, please migrate to hush. |
259 | If there is a feature msh has but hush does not, please let us know. | ||
260 | niro | 532 | |
261 | niro | 984 | # The minix shell (adds just 30k) is quite complete and handles things |
262 | # like for/do/done, case/esac and all the things you expect a Bourne | ||
263 | # shell to do. It is not always pedantically correct about Bourne | ||
264 | # shell grammar (try running the shell testscript "tests/sh.testcases" | ||
265 | # on it and compare vs bash) but for most things it works quite well. | ||
266 | # It uses only vfork, so it can be used on uClinux systems. | ||
267 | niro | 532 | |
268 | niro | 984 | |
269 | config SH_MATH_SUPPORT | ||
270 | bool "POSIX math support" | ||
271 | default y | ||
272 | depends on ASH || HUSH | ||
273 | help | ||
274 | Enable math support in the shell via $((...)) syntax. | ||
275 | |||
276 | config SH_MATH_SUPPORT_64 | ||
277 | bool "Extend POSIX math support to 64 bit" | ||
278 | default n | ||
279 | depends on SH_MATH_SUPPORT | ||
280 | help | ||
281 | Enable 64-bit math support in the shell. This will make the shell | ||
282 | slightly larger, but will allow computation with very large numbers. | ||
283 | This is not in POSIX, so do not rely on this in portable code. | ||
284 | |||
285 | niro | 532 | config FEATURE_SH_EXTRA_QUIET |
286 | bool "Hide message on interactive shell startup" | ||
287 | default n | ||
288 | depends on MSH || LASH || HUSH || ASH | ||
289 | help | ||
290 | Remove the busybox introduction when starting a shell. | ||
291 | |||
292 | niro | 816 | config FEATURE_SH_STANDALONE |
293 | niro | 532 | bool "Standalone shell" |
294 | default n | ||
295 | niro | 816 | depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS |
296 | niro | 532 | help |
297 | niro | 816 | This option causes busybox shells to use busybox applets |
298 | in preference to executables in the PATH whenever possible. For | ||
299 | niro | 532 | example, entering the command 'ifconfig' into the shell would cause |
300 | niro | 816 | busybox to use the ifconfig busybox applet. Specifying the fully |
301 | niro | 532 | qualified executable name, such as '/sbin/ifconfig' will still |
302 | niro | 816 | execute the /sbin/ifconfig executable on the filesystem. This option |
303 | niro | 532 | is generally used when creating a statically linked version of busybox |
304 | for use as a rescue shell, in the event that you screw up your system. | ||
305 | |||
306 | niro | 816 | This is implemented by re-execing /proc/self/exe (typically) |
307 | with right parameters. Some selected applets ("NOFORK" applets) | ||
308 | can even be executed without creating new process. | ||
309 | Instead, busybox will call <applet>_main() internally. | ||
310 | niro | 532 | |
311 | niro | 816 | However, this causes problems in chroot jails without mounted /proc |
312 | and with ps/top (command name can be shown as 'exe' for applets | ||
313 | started this way). | ||
314 | # untrue? | ||
315 | # Note that this will *also* cause applets to take precedence | ||
316 | # over shell builtins of the same name. So turning this on will | ||
317 | # eliminate any performance gained by turning on the builtin "echo" | ||
318 | # and "test" commands in ash. | ||
319 | # untrue? | ||
320 | # Note that when using this option, the shell will attempt to directly | ||
321 | # run '/bin/busybox'. If you do not have the busybox binary sitting in | ||
322 | # that exact location with that exact name, this option will not work at | ||
323 | # all. | ||
324 | niro | 532 | |
325 | niro | 816 | config FEATURE_SH_NOFORK |
326 | bool "Run 'nofork' applets directly" | ||
327 | niro | 532 | default n |
328 | niro | 816 | depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS |
329 | niro | 532 | help |
330 | niro | 816 | This option causes busybox shells [currently only ash] |
331 | to not execute typical fork/exec/wait sequence, but call <applet>_main | ||
332 | directly, if possible. (Sometimes it is not possible: for example, | ||
333 | this is not possible in pipes). | ||
334 | niro | 532 | |
335 | niro | 816 | This will be done only for some applets (those which are marked |
336 | NOFORK in include/applets.h). | ||
337 | niro | 532 | |
338 | niro | 816 | This may significantly speed up some shell scripts. |
339 | niro | 532 | |
340 | niro | 816 | This feature is relatively new. Use with care. |
341 | niro | 532 | |
342 | niro | 816 | config CTTYHACK |
343 | bool "cttyhack" | ||
344 | niro | 532 | default n |
345 | help | ||
346 | niro | 816 | One common problem reported on the mailing list is "can't access tty; |
347 | job control turned off" error message which typically appears when | ||
348 | one tries to use shell with stdin/stdout opened to /dev/console. | ||
349 | This device is special - it cannot be a controlling tty. | ||
350 | niro | 532 | |
351 | niro | 816 | Proper solution is to use correct device instead of /dev/console. |
352 | niro | 532 | |
353 | niro | 816 | cttyhack provides "quick and dirty" solution to this problem. |
354 | It analyzes stdin with various ioctls, trying to determine whether | ||
355 | it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line). | ||
356 | If it detects one, it closes stdin/out/err and reopens that device. | ||
357 | Then it executes given program. Usage example for /etc/inittab | ||
358 | (for busybox init): | ||
359 | niro | 532 | |
360 | niro | 816 | ::respawn:/bin/cttyhack /bin/sh |
361 | |||
362 | niro | 532 | endmenu |