[clug] Amusing little /bin/sh question..

[Kim Holburn]

a.sh:

#!/bin/sh

set -e
set -o nounset

somevar="a-value"

if [ "${1:-x}" = "--somevar" ]; then
   return
fi


On 2007/May/23, at 10:17 PM, Kim Holburn wrote:

> A small change to a.sh:
> --------------------
> #! /bin/sh
>
> set -e
> set -o nounset
>
> somevar="a-value"
>
> if [ "$1" = "--somevar" ]; then
>   exit
> fi
>
> <lots of other things with $somevar>
> ----------------
>
> in another script:
>
> . a.sh --somevar
> echo $somevar
>
>
> On 2007/May/23, at 8:52 AM, Andrew Janke wrote:
>
>> Hi all,
>>
>> Just a quick one that has be somewhat bemused..
>>
>> If I have one shell script (a.sh) as such:
>>
>> ----
>> #! /bin/sh
>>
>> set -e
>> set -o nounset
>>
>> somevar="a-value"
>>
>> <lots of other things with $somevar>
>> ----
>>
>> How can I get what the value of somevar in another script, for  
>> example
>> I can do this on the C/L:
>>
>>  mavis:dir$ set -n && a.sh && echo $somevar
>>
>> Things will sort of work but the question is how to do this within
>> another shell script as such (b.sh)
>>
>> ---
>> #! /bin/sh
>>
>> set -e
>> set -o nounset
>>
>> thevalueIwant=`something magic with a.sh`
>>
>> ---
>>
>> Of course I could resort to dirty tricks such as this:
>>
>>   thevalueIwant=`grep somevar a.sh | head -1 | cut -f2 -d\=`
>>
>> But then I am relying on myself not writing a comment about somevar
>> and other things..  Of course I could do this....
>>
>>   thevalueIwant=`grep -v \# a.sh | grep somevar | head -1 | cut - 
>> f2 -d\=`
>>
>> but now we are getting really ugly.
>>
>> Just wanted to know if anyone knows a "nice" way to do this.
>>
>>
>> ta
>>
>>
>> a
>>
>> PS: answers of converting it to perl/python/ruby/etc are not
>> considered answers! :)
>>
>>
>> -- 
>> Andrew Janke   (a.janke at gmail.com || http://a.janke.googlepages.com/)
>> Canberra->Australia    +61 (402) 700 883
>> -- 
>> linux mailing list
>> linux at lists.samba.org
>> https://lists.samba.org/mailman/listinfo/linux
>
> --
> Kim Holburn
> IT Network & Security Consultant
> Ph: +39 06 855 4294  M: +39 3494957443
> mailto:kim at holburn.net  aim://kimholburn
> skype://kholburn - PGP Public Key on request
>
> Democracy imposed from without is the severest form of tyranny.
>                           -- Lloyd Biggle, Jr. Analog, Apr 1961
>
>
>
> -- 
> linux mailing list
> linux at lists.samba.org
> https://lists.samba.org/mailman/listinfo/linux

--
Kim Holburn
IT Network & Security Consultant
Ph: +39 06 855 4294  M: +39 3494957443
mailto:kim at holburn.net  aim://kimholburn
skype://kholburn - PGP Public Key on request

Democracy imposed from without is the severest form of tyranny.
                           -- Lloyd Biggle, Jr. Analog, Apr 1961