Mail Archives: cygwin/2000/08/08/10:21:05
I usually do something like:
(alias a=b) >/dev/null 2>&1 && echo "we're running bash"
to detect which shell is in use.
cgf
On Tue, Aug 08, 2000 at 12:08:43PM +0200, Christian J?nsson wrote:
>What about trying to execute "display-shell-version (C-x C-v)". If
>we're in a bash shell, we'd get the verision info (works on both
>bash1 and bash2) and I suppose that if we're on (a)sh we'd get nothing.
>
>Cheers,
>
>/ChJ
>
>
>Bob McGowan wrote:
>>
>> DJ Delorie wrote:
>> >
>> > > echo $BASH_VERSION ?
>> >
>> > No, because if you run sh from bash, it may inherit that environment
>> > variable.
>>
>> By default, it should not be exported, but a user could export it
>> themselves.
>>
>> How about a double check of RANDOM? If it gets exported, the inherited
>> value in (a)sh appears to be constant, while in bash it changes with
>> each access. The only problem I can see with this is that a user could
>> unset RANDOM, then make a new variable with that name, but which will
>> not have the special feature. I would think that this is rare enough to
>> maybe be ignored?
>>
>> --
>> Bob McGowan
>> Staff Software Quality Engineer
>> VERITAS Software
>> rmcgowan AT veritas DOT com
>>
>> --
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>
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