Re: [gentoo-user] crontab not executing

[Florian Philipp <lists@binarywings.net>]

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Am 20.06.2011 12:39, schrieb Adam Carter:
>>> /bin/sh is a symlink to bash.
>>
>> Which runs as sh when run from the symlink.
> 
> I dont understand. "runs as" usually means "runs under the user
> context" to me - are you saying bash has an sh compatibility mode?
> 

Yes, that's exactly what he wants to say.
Interestingly, that mode still supports most bash-only features like
arrays. I guess they can do this because it doesn't change the semantic
of old Bourne shell code. It just makes some formerly invalid syntax valid.

/bin/sh -c -c 'array=( sh bash ); echo I am a ${array[1]}' 2>/dev/null
|| echo I am a sh
> I am a bash

Other drop-in replacements for /bin/sh like dash are less forgiving:

/bin/dash -c -c 'array=( sh bash ); echo I am a ${array[1]}' 2>/dev/null
|| echo I am a sh
> I am a sh


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