Re: Setting environment variable with output from a program
On Jul 5, 11:06 am, "Pegasus \(MVP\)" <I...@fly.com> wrote:
> <Dennis.P.Mulque...@wellsfargo.com> wrote in message
>
> news:1183651126.625243.92260@c77g2000hse.googlegroups.com...
>
>
>
>
>
> >I am trying to duplicate the following UNIX command in Windows XP DOS
> > mode:
>
> > set WFHM_DATE=`perl Calc_Prior_Work_Date.pl`
>
> > which would set the WFHM_DATE to the value of 20070703 (when run on
> > July 5th, 2007). I am running a third party software package that
> > supports a DOS mode which is the only place I can manipulate the
> > environment variables on-the-fly.
>
> > I have tried doing 'perl Calc_Prior_Work_Date.pl | set WFHM_DATE='.
> > It did not work.
>
> > Any ideas?
>
> > Dennis
>
> Every process you launch in Windows inherits its environmental
> variables from its parent. If it modifies them then these changes
> are not passed back to the parent.
>
> To modify environmental variables globally you can use one of
> these tools:
> setx.exe (Win2000 Resource Kit)
> setenv.exe (ftp://barnyard.syr.edu/pub/vefatica/setenv.exe)
>
> Note that the change will affect all new processes but not
> pre-existing ones.
>
> By the way: "DOS" is an operating system, same as Unix. When
> you say "DOS mode" you probably mean the Command Prompt.- Hide quoted text -
>
> - Show quoted text -
Correct. I don't have setx available on my machine. I did find a
solution that is working for me in another thread. It boils down to
this:
for /f "tokens=*" %%a in ('perl perl/Calc_Prior_Work_Date.pl') do set
PRIOR_DATE=%%a
set yy=%PRIOR_DATE:~0,4%
set mm=%PRIOR_DATE:~4,2%
set dd=%PRIOR_DATE:~6,2%
The perl program is (all comments removed):
$| = 1;
use strict;
use diagnostics;
use Date::Manip;
main: {
Date_Init('TZ=US/Central', 'GlobalCnf=perl/Holidays.dates');
my $date = $ARGV[0] || 'today';
my $diff = Date_IsWorkDay($date);
$diff = 0 if (defined(Date_IsHoliday($date)));
print STDOUT &UnixDate(&Date_PrevWorkDay($date, $diff), '%Y%m%d');
exit 0;
}
The Holidays.dates file is:
*Holiday
1/1 = New Year's Day
Last Monday in May = Memorial Day
7/4 = Independence Day
First Monday in September = Labor Day
Fourth Thursday in November = Thanksgiving Day
12/25 = Christmas Day
