The awk program do generate shell script.. it genetates "tar" command
with ISO date on it($ISODATE). The ISO date tells when the back was taken.
Anyway, I am putting the export on the "tar" script.
"Edmund R.
MacKenty"
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ist.edu> Re: awk question
01/03/2006 10:16
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John Summerfied writes:
>Eddie Chen wrote:
>> I am trying to export a varable from awk and is not taken an effect
when I
>> do "env" once I exit from the awk program.
>>
>> system(export ISODATE=`date --iso-8601`) or I think I also try
"export
>> ISODATE=`date --iso-8601` | getline isodate "
>>
>> how do I set ENV varable in awk ...
>
>A program cannot change its parent's environment.
>
>A workaround is to write shell command(s) to a temp file then source it.
>
>In bash,
>help source
Or, if your awk script does not generate any output, you could have it
output the value and use this shell idiom to set an environment variable in
the parent:
export ISODATE=`awk '...system("date --iso-8601"); ...'`
It is not clear to me why you need to use awk to set the environment
variable. Is it possible to just have the parent shell script set it
before running awk? As in:
export ISODATE="`date --iso-8601`"
That makes the variable available to both your shell script and the awk
program.
Or is something in your awk script deciding to use the ISO 8601 date format
instead of some other date format? If so, consider refactoring your awk
script.
- MacK.
-----
Edmund R. MacKenty
Software Architect
Rocket Software, Inc.
Newton, MA USA
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