Re: [PATCH] bash: add alternative configuration for bin/sh -> /bin/bash

[Tim Harvey <tharvey@irobot.com>]

Chris Larson wrote:
> Be very careful with this.  Specifically, be sure to thoroughly test
> installing bash onto a system that currently has busybox, and the
> upgrade paths for both busybox and bash.  You never want to get into a
> state, due to pre/post rm/install script execution order, where
> /bin/sh doesn't exist.  If that happens, you won't be able to execute
> the next script to fix it :)
>   
in my case, I have both bash and busybox installed and I want bash to 
take priority as the /bin/sh which it otherwise does not.

attempting to remove the package that contains your shell is something 
you need to be careful as anyway.

This seems to me to be a prime example of where alternatives should be used?

Tim
> On Fri, Mar 27, 2009 at 1:50 PM, Tim Harvey <tharvey@irobot.com> wrote:
>   
>> Add alternative configuration for /bin/sh -> /bin/bash so that for example
>> bash can exist (and override) as shell if busybox is also installed
>>
>> diff --git a/recipes/bash/bash.inc b/recipes/bash/bash.inc
>> index 4eba689..7c6122b 100644
>> --- a/recipes/bash/bash.inc
>> +++ b/recipes/bash/bash.inc
>> @@ -4,7 +4,7 @@ DEPENDS = "ncurses"
>> SECTION = "base/shell"
>> LICENSE = "GPL"
>>
>> -inherit autotools gettext
>> +inherit autotools gettext update-alternatives
>>
>> PARALLEL_MAKE = ""
>>
>> @@ -33,3 +33,8 @@ pkg_postinst () {
>>       grep -q "bin/bash" $D${sysconfdir}/shells || echo /bin/bash >>
>> $D${sysconfdir}/shells
>>       grep -q "bin/sh" $D${sysconfdir}/shells || echo /bin/sh >>
>> $D${sysconfdir}/shells
>> }
>> +
>> +ALTERNATIVE_NAME = "sh"
>> +ALTERNATIVE_LINK = "${base_bindir}/sh"
>> +ALTERNATIVE_PATH = "${base_bindir}/bash"
>> +ALTERNATIVE_PRIORITY = "90"
>> diff --git a/recipes/bash/bash_3.0.bb b/recipes/bash/bash_3.0.bb
>> index e23887a..8165d07 100644
>> --- a/recipes/bash/bash_3.0.bb
>> +++ b/recipes/bash/bash_3.0.bb
>> @@ -1,5 +1,5 @@
>> require bash.inc
>> -PR = "r11"
>> +PR = "r12"
>>
>> SRC_URI += "\
>>  file://bash-3.0-fixes.patch;patch=1 \
>> diff --git a/recipes/bash/bash_3.2.bb b/recipes/bash/bash_3.2.bb
>> index 6a48a4b..e175467 100644
>> --- a/recipes/bash/bash_3.2.bb
>> +++ b/recipes/bash/bash_3.2.bb
>> @@ -1,6 +1,6 @@
>> require bash.inc
>>
>> -PR = "r7"
>> +PR = "r8"
>>
>> SRC_URI += "\
>>           file://builtins.patch;patch=1 \
>>
>>
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>>     
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