[Discuss] Bourne Shell variable assignment question

[matt at mattshields.org (Matt Shields)]

On Thu, Dec 15, 2011 at 4:12 PM, Matt Shields <matt at mattshields.org> wrote:

> On Thu, Dec 15, 2011 at 3:57 PM, Jerry Feldman <gaf at blu.org> wrote:
>
>> I have not done my homework on this as much as I should.
>> A coworker needs to set variable names and values input from another
>> file. Normally, I would source that file, but he specifically wants to
>> parse the file.
>> So, in simple terms, he has a file that has something like:
>> var1=foo
>>
>> Instead of sourcing he wants to parse the file using readline so he
>> reads the variable name, then he wants to assign a variable of the same
>> name.
>> So, in his code he has something like
>> readline
>> ... - code to parse the line
>> Where varname contains the variable name(eg var1), and value contains
>> the value(eg foo)
>>
>> --
>> Jerry Feldman <gaf at blu.org>
>> Boston Linux and Unix
>> PGP key id:3BC1EB90
>> PGP Key fingerprint: 49E2 C52A FC5A A31F 8D66  C0AF 7CEA 30FC 3BC1 EB90
>>
>>
>>
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>>
>>
> Maybe not the most elegant way, but it works.  See below
>
> Matts-MacBook-Pro:temp matt$ cat test1.sh
> #!/bin/bash
> var1=dog
> var2=cat
> var3=cow
>
> Matts-MacBook-Pro:temp matt$ cat test2.sh
> #!/bin/bash
> myvar=`cat test1.sh | grep var2 | cut -d"=" -f2`
> echo $myvar
>
> Matts-MacBook-Pro:temp matt$ bash test2.sh
> cow
>
> Matthew Shields
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>
Sorry, first file should be the follow.  That's why the output was wrong.

Matts-MacBook-Pro:temp matt$ cat test1.sh
#!/bin/bash
var1=dog
var2=cow
var3=cat



Matthew Shields
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