b287e2e27
Eric Andersen
2003-08-08
Subject
Use the new 'select' option to make the shell config much less evil and far more obvious. -Erik
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shell/Config.in+27 -38
| @@ -13,15 +13,19 @@ choice | |
| and full featured. | |
| config CONFIG_FEATURE_SH_IS_ASH | |
| + | select CONFIG_ASH |
| bool "ash" | |
| config CONFIG_FEATURE_SH_IS_HUSH | |
| + | select CONFIG_HUSH |
| bool "hush" | |
| config CONFIG_FEATURE_SH_IS_LASH | |
| + | select CONFIG_LASH |
| bool "lash" | |
| config CONFIG_FEATURE_SH_IS_MSH | |
| + | select CONFIG_MSH |
| bool "msh" | |
| config CONFIG_FEATURE_SH_IS_NONE | |
| @@ -29,20 +33,15 @@ config CONFIG_FEATURE_SH_IS_NONE | |
| endchoice | |
| - | if CONFIG_FEATURE_SH_IS_ASH |
| - | config CONFIG_ASH |
| - | default y |
| - | |
| - | comment "ash (forced enabled as default shell)" |
| - | endif |
| - | |
| - | if !CONFIG_FEATURE_SH_IS_ASH |
| config CONFIG_ASH | |
| bool "ash" | |
| default y | |
| help | |
| - | Make sh a link to ash. |
| - | endif |
| + | Tha 'ash' shell adds about 60k in the default configuration and is |
| + | the most complete and most pedantically correct shell included with |
| + | busybox. This shell is actually a derivitive the Debian 'dash' shell |
| + | (by Herbert Xu), which was created by porting the 'ash' shell |
| + | (written by Kenneth Almquist) from NetBSD. |
| comment "Ash Shell Options" | |
| depends on CONFIG_ASH | |
| @@ -98,51 +97,41 @@ config CONFIG_ASH_OPTIMIZE_FOR_SIZE | |
| help | |
| Compile ash for reduced size at price of speed. | |
| - | if CONFIG_FEATURE_SH_IS_HUSH |
| - | config CONFIG_HUSH |
| - | default y |
| - | |
| - | comment "hush (forced enabled as default shell)" |
| - | endif |
| - | |
| - | if !CONFIG_FEATURE_SH_IS_HUSH |
| config CONFIG_HUSH | |
| bool "hush" | |
| default n | |
| help | |
| - | Make sh a link to hush. |
| - | endif |
| + | hush is very small shell (just 18k) and it has fairly complete Bourne |
| + | shell grammer. It even handles all the normal flow control options |
| + | such as if/then/elif/else/fi, for/in/do/done, while loops, etc. |
| - | if CONFIG_FEATURE_SH_IS_LASH |
| - | config CONFIG_LASH |
| - | default y |
| + | It does not handle case/esac, select, function, here documents ( << |
| + | word ), arithmetic expansion, aliases, brace expansion, tilde |
| + | expansion, &> and >& redirection of stdout+stderr, etc. |
| - | comment "lash (forced enabled as default shell)" |
| - | endif |
| - | if !CONFIG_FEATURE_SH_IS_LASH |
| config CONFIG_LASH | |
| bool "lash" | |
| default n | |
| help | |
| - | Make sh a link to lash. |
| - | endif |
| - | |
| - | if CONFIG_FEATURE_SH_IS_MSH |
| - | config CONFIG_MSH |
| - | default y |
| + | 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 grammer. It |
| + | does handle pipes, redirects, and job control though. Adding in |
| + | command editing makes it a very nice lightweight command prompt. |
| - | comment "msh (forced enabled as default shell)" |
| - | endif |
| - | if !CONFIG_FEATURE_SH_IS_MSH |
| config CONFIG_MSH | |
| bool "msh" | |
| default n | |
| help | |
| - | Make sh a link to msh. |
| - | endif |
| - | |
| + | 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. |
| comment "Bourne Shell Options" | |
| depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH | |