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Let people select their shell at compile time.

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This commit is contained in:
Eric Andersen 2001-07-06 19:24:27 +00:00
parent 3bbcc95ac9
commit 00e56ada9c
2 changed files with 94 additions and 0 deletions
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55
Config.h
View File

@ -144,6 +144,41 @@
// pretty/useful). // pretty/useful).
// //
// //
// If you enabled BB_SH above, you may select one of the following shells.
// You can only select ONE of the following shells. Sorry.
//
// 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 Bourne shell grammer. It does handle pipes, redirects, and job
// control though. Adding in command editing makes it very nice lightweight
// command prompt.
//#define BB_FEATURE_LASH
//
// hush is also quite small (just 18k) and it has very complete Bourne shell
// grammer. It handles if/then/else/fi just fine, but doesn't handle loops
// like for/do/done or case/esac and such. It also currently has a problem
// with job control.
//#define BB_FEATURE_HUSH
//
// msh: The minix shell (adds just 30k) is quite complete and handles things
// like for/do/done, case/esac and all the things you expect a Bourne shell to
// do. It is not always pedantically correct about Bourne shell grammer (try
// running the shell testscript "tests/sh.testcases" on it and compare vs
// bash) but for most things it works quite well. It also uses only vfork, so
// it can be used on uClinux systems. This was only recently added, so there is
// still room to shrink it further...
#define BB_FEATURE_MSH
//
// ash: This adds about 60k in the default configuration and is the most
// complete and most pedantically correct shell included with busybox. This
// shell was also recently added, and several people (mainly Vladimir and Erik)
// have been working on it. There are a number of configurable things at the
// top of ash.c as well, so check those out if you want to tweak things. The
// Posix math support is currently disabled (that bit of code was horrible) but
// will be restored for the next BusyBox release.
//#define BB_FEATURE_ASH
//
// BusyBox will, by default, malloc space for its buffers. This costs code // BusyBox will, by default, malloc space for its buffers. This costs code
// size for the call to xmalloc. You can use the following feature to have // size for the call to xmalloc. You can use the following feature to have
// them put on the stack. For some very small machines with limited stack // them put on the stack. For some very small machines with limited stack
@ -391,6 +426,26 @@
#undef BB_FEATURE_COMMAND_USERNAME_COMPLETION #undef BB_FEATURE_COMMAND_USERNAME_COMPLETION
#undef BB_FEATURE_SH_FANCY_PROMPT #undef BB_FEATURE_SH_FANCY_PROMPT
#endif #endif
#if ! defined BB_FEATURE_LASH && ! defined BB_FEATURE_HUSH && ! defined BB_FEATURE_MSH && ! defined BB_FEATURE_ASH
#define BB_FEATURE_MSH
#endif
#if defined BB_FEATURE_ASH && (defined BB_FEATURE_LASH || defined BB_FEATURE_HUSH || defined BB_FEATURE_MSH)
#undef BB_FEATURE_LASH
#undef BB_FEATURE_HUSH
#undef BB_FEATURE_MSH
#elif defined BB_FEATURE_MSH && (defined BB_FEATURE_LASH || defined BB_FEATURE_HUSH || defined BB_FEATURE_MSH)
#undef BB_FEATURE_LASH
#undef BB_FEATURE_HUSH
#undef BB_FEATURE_ASH
#elif defined BB_FEATURE_HUSH && (defined BB_FEATURE_LASH || defined BB_FEATURE_HUSH || defined BB_FEATURE_MSH)
#undef BB_FEATURE_LASH
#undef BB_FEATURE_MSH
#undef BB_FEATURE_ASH
#elif defined BB_FEATURE_LASH && (defined BB_FEATURE_LASH || defined BB_FEATURE_HUSH || defined BB_FEATURE_MSH)
#undef BB_FEATURE_HUSH
#undef BB_FEATURE_MSH
#undef BB_FEATURE_ASH
#endif
#else #else
#undef BB_FEATURE_SH_APPLETS_ALWAYS_WIN #undef BB_FEATURE_SH_APPLETS_ALWAYS_WIN
#undef BB_FEATURE_SH_STANDALONE_SHELL #undef BB_FEATURE_SH_STANDALONE_SHELL

39
sh.c Normal file
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@ -0,0 +1,39 @@
/* vi: set sw=4 ts=4: */
/*
* Shell wrapper file for busybox
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "busybox.h"
#if defined BB_FEATURE_ASH
#include "ash.c"
#elif defined BB_FEATURE_MSH
#include "msh.c"
#elif defined BB_FEATURE_HUSH
#include "hush.c"
#elif defined BB_FEATURE_LASH
#include "lash.c"
#endif
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/