[PLUG] Maybe not so dumb BASH question

[Jason R. Martin]

Bill -

I don't know what to tell you then, since making that change caused your 
script to function on my Fedora Core 3 box.

Jason

William A Morita wrote:
> Jason,
> 
> Making the change does not affect the output of the script. 
> If I am reading the documentation correctly, the value set in the function
> should override the initial value of "None".
> 
> - Bill 
> wamorita at hevanet.com 
> 
>  
> 
> -----Original Message-----
> From: Jason R. Martin [mailto:nsxfreddy at verizon.net] 
> Sent: Thursday, May 05, 2005 11:10 PM
> To: General Linux/UNIX discussion and help; civil and on-topic
> Cc: wamorita at hevanet.com
> Subject: Re: [PLUG] Maybe not so dumb BASH question
> 
> BTW, since I was too tired to mention it in the last email, changing
> 
>    Num=`GetNumber`
> 
> to
> 
>    Num=$(GetNumber)
> 
> will also solve your problem, this time without exporting TMPDIR.
> 
> Jason
> 
> Jason R. Martin wrote:
> 
>>The backtick (command substitution) operator generates it's own 
>>environment (I think).  You'll have to export TMPDIR to mark it for 
>>the environment passed to the child process.
>>
>>Of course, it's late, and my processor has gone to sleep (S5?).
>>
>>Jason
>>
>>William A Morita wrote:
>>
>>
>>>I have written the script below and am puzzled by the fact that the 
>>>shell variable TMPFILE is not global in nature.
>>>According to all documentation I can find, it is explicitly stated 
>>>that with regard to function, all variables are global unless the 
>>>"local"
>>>keyword is
>>>used.
>>>I am not seeing a global effect when the script below is run on White 
>>>Box Linux (Bash 2.05) or Fedora Core 3 (Bash 3.05).  Is there a 
>>>setting I may have wrong someplace?
>>>
>>>==============================
>>>#!/bin/bash
>>># Script to get unique number using files in a temp directory #
>>>
>>>set -x
>>>
>>>TMPDIR=~/tmp
>>>
>>>function GetNumber
>>>{
>>>  set -xv
>>>  for n in 0 1 2 3 4 5 6 7 8 9
>>>  do
>>>    TMPFILE=$TMPDIR/TagFile$n
>>>    if [ -f $TMPFILE ]
>>>    then
>>>      continue
>>>    else
>>>      touch $TMPFILE
>>>      echo $n
>>>      trap "rm -f $TMPFILE" INT TERM
>>>      exit
>>>    fi
>>>  done
>>>}
>>>
>>>TMPFILE=None
>>>Num=`GetNumber`
>>>
>>>echo $Num $TMPFILE
>>>==============================
>>>
>>> 
>>> 
>>>
>>>- Bill
>>>wamorita at hevanet.com
>>>Home: (503) 697-6994
>>>Cell: (503) 260-3876
>>>
>>>_______________________________________________
>>>PLUG mailing list
>>>PLUG at lists.pdxlinux.org
>>>http://lists.pdxlinux.org/mailman/listinfo/plug
>>>
>>
>>_______________________________________________
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>>http://lists.pdxlinux.org/mailman/listinfo/plug
>>
> 
> 
>