Diff of /trunk/mkinitrd-magellan/busybox/shell/Config.in

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	revision 815 by niro, Sat Sep 1 22:45:15 2007 UTC	revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
#	Line 20  config FEATURE_SH_IS_HUSH	Line 20  config FEATURE_SH_IS_HUSH
20	select HUSH	select HUSH
21	bool "hush"	bool "hush"
22
23	config FEATURE_SH_IS_LASH	####config FEATURE_SH_IS_LASH
24	select LASH	#### select LASH
25	bool "lash"	#### bool "lash"
26
27	config FEATURE_SH_IS_MSH	config FEATURE_SH_IS_MSH
28	select MSH	select MSH
#	Line 36  endchoice	Line 36  endchoice
36	config ASH	config ASH
37	bool "ash"	bool "ash"
38	default n	default n
	select TEST
39	help	help
40	Tha 'ash' shell adds about 60k in the default configuration and is	Tha 'ash' shell adds about 60k in the default configuration and is
41	the most complete and most pedantically correct shell included with	the most complete and most pedantically correct shell included with
42	busybox.  This shell is actually a derivative of the Debian 'dash'	busybox. This shell is actually a derivative of the Debian 'dash'
43	shell (by Herbert Xu), which was created by porting the 'ash' shell	shell (by Herbert Xu), which was created by porting the 'ash' shell
44	(written by Kenneth Almquist) from NetBSD.	(written by Kenneth Almquist) from NetBSD.
45
46	comment "Ash Shell Options"	comment "Ash Shell Options"
47	depends on ASH	depends on ASH
48
49		config ASH_BASH_COMPAT
50		bool "bash-compatible extensions"
51		default y
52		depends on ASH
53		help
54		Enable bash-compatible extensions.
55
56	config ASH_JOB_CONTROL	config ASH_JOB_CONTROL
57	bool "Job control"	bool "Job control"
58	default y	default y
#	Line 63  config ASH_READ_NCHARS	Line 69  config ASH_READ_NCHARS
69	'read -s' will read without echoing the user's input.	'read -s' will read without echoing the user's input.
70
71	config ASH_READ_TIMEOUT	config ASH_READ_TIMEOUT
72	bool "'read -t S' support."	bool "'read -t S' support"
73	default n	default n
74	depends on ASH	depends on ASH
75	help	help
#	Line 90  config ASH_MATH_SUPPORT_64	Line 96  config ASH_MATH_SUPPORT_64
96	default n	default n
97	depends on ASH_MATH_SUPPORT	depends on ASH_MATH_SUPPORT
98	help	help
99	Enable 64-bit math support in the ash shell.  This will make	Enable 64-bit math support in the ash shell. This will make
100	the shell slightly larger, but will allow computation with very	the shell slightly larger, but will allow computation with very
101	large numbers.	large numbers.
102
#	Line 104  config ASH_GETOPTS	Line 110  config ASH_GETOPTS
110	config ASH_BUILTIN_ECHO	config ASH_BUILTIN_ECHO
111	bool "Builtin version of 'echo'"	bool "Builtin version of 'echo'"
112	default y	default y
	select ECHO
113	depends on ASH	depends on ASH
114	help	help
115	Enable support for echo, built in to ash.	Enable support for echo, builtin to ash.
116
117		config ASH_BUILTIN_PRINTF
118		bool "Builtin version of 'printf'"
119		default y
120		depends on ASH
121		help
122		Enable support for printf, builtin to ash.
123
124	config ASH_BUILTIN_TEST	config ASH_BUILTIN_TEST
125	bool "Builtin version of 'test'"	bool "Builtin version of 'test'"
126	default y	default y
	select TEST
127	depends on ASH	depends on ASH
128	help	help
129	Enable support for test, built in to ash.	Enable support for test, builtin to ash.
130
131	config ASH_CMDCMD	config ASH_CMDCMD
132	bool "'command' command to override shell builtins"	bool "'command' command to override shell builtins"
#	Line 163  config ASH_EXPAND_PRMT	Line 174  config ASH_EXPAND_PRMT
174	config HUSH	config HUSH
175	bool "hush"	bool "hush"
176	default n	default n
	select TRUE
	select FALSE
	select TEST
177	help	help
178	hush is a very small shell (just 18k) and it has fairly complete	hush is a very small shell (just 18k) and it has fairly complete
179	Bourne shell grammar.  It even handles all the normal flow control	Bourne shell grammar. It even handles all the normal flow control
180	options such as if/then/elif/else/fi, for/in/do/done, while loops,	options such as if/then/elif/else/fi, for/in/do/done, while loops,
181	etc.	case/esac.
182
183	It does not handle case/esac, select, function, here documents ( <<	It uses only vfork, so it can be used on uClinux systems.
184
185		It does not handle select, functions, here documents ( <<
186	word ), arithmetic expansion, aliases, brace expansion, tilde	word ), arithmetic expansion, aliases, brace expansion, tilde
187	expansion, &> and >& redirection of stdout+stderr, etc.	expansion, &> and >& redirection of stdout+stderr, etc.
188
189		config HUSH_HELP
190		bool "help builtin"
191		default n
192		depends on HUSH
193		help
194		Enable help builtin in hush. Code size + ~1 kbyte.
195
196		config HUSH_INTERACTIVE
197		bool "Interactive mode"
198		default y
199		depends on HUSH
200		help
201		Enable interactive mode (prompt and command editing).
202		Without this, hush simply reads and executes commands
203		from stdin just like a shell script from the file.
204		No prompt, no PS1/PS2 magic shell variables.
205
206		config HUSH_JOB
207		bool "Job control"
208		default n
209		depends on HUSH_INTERACTIVE
210		help
211		Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current
212		command (not entire shell), fg/bg builtins work. Without this option,
213		"cmd &" still works by simply spawning a process and immediately
214		prompting for next command (or executing next command in a script),
215		but no separate process group is formed.
216
217		config HUSH_TICK
218		bool "Process substitution"
219		default n
220		depends on HUSH
221		help
222		Enable process substitution `command` and $(command) in hush.
223
224		config HUSH_IF
225		bool "Support if/then/elif/else/fi"
226		default n
227		depends on HUSH
228		help
229		Enable if/then/elif/else/fi in hush.
230
231		config HUSH_LOOPS
232		bool "Support for, while and until loops"
233		default n
234		depends on HUSH
235		help
236		Enable for, while and until loops in hush.
237		As of 2008-07, break and continue statements are not supported.
238
239		config HUSH_CASE
240		bool "Support case ... esac statement"
241		default n
242		depends on HUSH
243		help
244		Enable case ... esac statement in hush. +400 bytes.
245
246	config LASH	config LASH
247	bool "lash"	bool "lash"
248	default n	default n
249	select TRUE	select HUSH
250	select FALSE	help
251	select TEST	lash is deprecated and will be removed, please migrate to hush.
	help
	lash is the very smallest shell (adds just 10k) and it is quite
	usable as a command prompt, but it is not suitable for any but the
	most trivial scripting (such as an initrd that calls insmod a few
	times) since it does not understand any Bourne shell grammar.  It
	does handle pipes, redirects, and job control though.  Adding in
	command editing makes it a very nice lightweight command prompt.
252
253	config MSH	config MSH
254	bool "msh"	bool "msh"
255	default n	default n
	select TRUE
	select FALSE
	select TEST
256	help	help
257	The minix shell (adds just 30k) is quite complete and handles things	The minix shell (adds just 30k) is quite complete and handles things
258	like for/do/done, case/esac and all the things you expect a Bourne	like for/do/done, case/esac and all the things you expect a Bourne
259	shell to do.  It is not always pedantically correct about Bourne	shell to do. It is not always pedantically correct about Bourne
260	shell grammar (try running the shell testscript "tests/sh.testcases"	shell grammar (try running the shell testscript "tests/sh.testcases"
261	on it and compare vs bash) but for most things it works quite well.	on it and compare vs bash) but for most things it works quite well.
262	It also uses only vfork, so it can be used on uClinux systems.	It uses only vfork, so it can be used on uClinux systems.
263
264	comment "Bourne Shell Options"	comment "Bourne Shell Options"
265	depends on MSH || LASH || HUSH || ASH	depends on MSH || LASH || HUSH || ASH
#	Line 216  config FEATURE_SH_EXTRA_QUIET	Line 271  config FEATURE_SH_EXTRA_QUIET
271	help	help
272	Remove the busybox introduction when starting a shell.	Remove the busybox introduction when starting a shell.
273
274	config FEATURE_SH_STANDALONE_SHELL	config FEATURE_SH_STANDALONE
275	bool "Standalone shell"	bool "Standalone shell"
276	default n	default n
277	depends on MSH || LASH || HUSH || ASH	depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS
278	help	help
279	This option causes the selected busybox shell to use busybox applets	This option causes busybox shells to use busybox applets
280	in preference to executables in the PATH whenever possible.  For	in preference to executables in the PATH whenever possible. For
281	example, entering the command 'ifconfig' into the shell would cause	example, entering the command 'ifconfig' into the shell would cause
282	busybox to use the ifconfig busybox applet.  Specifying the fully	busybox to use the ifconfig busybox applet. Specifying the fully
283	qualified executable name, such as '/sbin/ifconfig' will still	qualified executable name, such as '/sbin/ifconfig' will still
284	execute the /sbin/ifconfig executable on the filesystem.  This option	execute the /sbin/ifconfig executable on the filesystem. This option
285	is generally used when creating a statically linked version of busybox	is generally used when creating a statically linked version of busybox
286	for use as a rescue shell, in the event that you screw up your system.	for use as a rescue shell, in the event that you screw up your system.
287
288	Note that this will *also* cause applets to take precedence	This is implemented by re-execing /proc/self/exe (typically)
289	over shell builtins of the same name.  So turning this on will	with right parameters. Some selected applets ("NOFORK" applets)
290	eliminate any performance gained by turning on the builtin "echo"	can even be executed without creating new process.
291	and "test" commands in ash.	Instead, busybox will call <applet>_main() internally.
292
293	Note that when using this option, the shell will attempt to directly	However, this causes problems in chroot jails without mounted /proc
294	run '/bin/busybox'.  If you do not have the busybox binary sitting in	and with ps/top (command name can be shown as 'exe' for applets
295	that exact location with that exact name, this option will not work at	started this way).
296	all.	# untrue?
297		#  Note that this will *also* cause applets to take precedence
298	config FEATURE_COMMAND_EDITING	#  over shell builtins of the same name. So turning this on will
299	bool "Command line editing"	#  eliminate any performance gained by turning on the builtin "echo"
300	default n	#  and "test" commands in ash.
301	depends on MSH || LASH || HUSH || ASH	# untrue?
302	help	#  Note that when using this option, the shell will attempt to directly
303	Enable command editing in shell.	#  run '/bin/busybox'. If you do not have the busybox binary sitting in
304		#  that exact location with that exact name, this option will not work at
305	config FEATURE_COMMAND_EDITING_VI	#  all.
306	bool "vi-style line editing commands"
307	default n	config FEATURE_SH_NOFORK
308	depends on FEATURE_COMMAND_EDITING	bool "Run 'nofork' applets directly"
309	help	default n
310	Enable vi-style line editing in the shell.  This mode can be	depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS
311	turned on and off with "set -o vi" and "set +o vi".	help
312		This option causes busybox shells [currently only ash]
313		to not execute typical fork/exec/wait sequence, but call <applet>_main
314		directly, if possible. (Sometimes it is not possible: for example,
315		this is not possible in pipes).
316
317		This will be done only for some applets (those which are marked
318		NOFORK in include/applets.h).
319
320		This may significantly speed up some shell scripts.
321
322		This feature is relatively new. Use with care.
323
324		config CTTYHACK
325		bool "cttyhack"
326		default n
327		help
328		One common problem reported on the mailing list is "can't access tty;
329		job control turned off" error message which typically appears when
330		one tries to use shell with stdin/stdout opened to /dev/console.
331		This device is special - it cannot be a controlling tty.
332
333		Proper solution is to use correct device instead of /dev/console.
334
335		cttyhack provides "quick and dirty" solution to this problem.
336		It analyzes stdin with various ioctls, trying to determine whether
337		it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line).
338		If it detects one, it closes stdin/out/err and reopens that device.
339		Then it executes given program. Usage example for /etc/inittab
340		(for busybox init):
341
342	config FEATURE_COMMAND_HISTORY	::respawn:/bin/cttyhack /bin/sh
	int "History size"
	range 0 99999
	default 15
	depends on FEATURE_COMMAND_EDITING
	help
	Specify command history size in shell.
	config FEATURE_COMMAND_SAVEHISTORY
	bool "History saving"
	default n
	depends on ASH && FEATURE_COMMAND_EDITING
	help
	Enable history saving in ash shell.
	config FEATURE_COMMAND_TAB_COMPLETION
	bool "Tab completion"
	default n
	depends on FEATURE_COMMAND_EDITING
	help
	Enable tab completion in shell.
	config FEATURE_COMMAND_USERNAME_COMPLETION
	bool "Username completion"
	default n
	depends on FEATURE_COMMAND_TAB_COMPLETION
	help
	Enable username completion in shell.
	config FEATURE_SH_FANCY_PROMPT
	bool "Fancy shell prompts"
	default n
	depends on FEATURE_COMMAND_EDITING
	help
	Setting this option allows for prompts to use things like \w and
	\$ and also using escape codes.
343
344	endmenu	endmenu

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