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Running a program in WinNT

Posted on 2000-02-17
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Last Modified: 2012-05-04
Hello,

I have perl installed on WinBT 4.0.  I am trying to setup a perl script that will execute a VB executable and than sleep for x amount of time and repeat.  I have everything set except for the part of executing the vb program.  Does anyone remember how to get perl to run a program.  I know it was something simple I just can't remember, I thought it was 'system()' but I was wrong.

Thanks,

Joe
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Comment
Question by:jvieira
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7 Comments
 
LVL 16

Expert Comment

by:maneshr
ID: 2532554
use back ticks. i tried that and it worked on NT4.0

Eg.

$v=`dir`;

print $v,"\n";
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Author Comment

by:jvieira
ID: 2532695
This is what I have:

$status = 1;
while ($status) {
      $v = `D:\Stuff\Project1\Project1.exe`;
      print $v,"\n";
      sleep 10;
}

minus the parts that change the value of $status.  I get the following error:

The name specified is not recognized as an internal or external command, operable program or batch file

What am I missing?

Thanks,

Joe
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LVL 16

Accepted Solution

by:
maneshr earned 50 total points
ID: 2532840
i just changed my script to this and it works

`c:/manesh/perlcd/core/setup.exe`;


replace the \ with /
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Expert Comment

by:Whitty
ID: 2532893
I beleive the problem with the application not being recognized is that you were using the windows "\" in your file name, which Perl tries to interpret at meta sequences.

Try the following:

$status = 1;
while ($status)
{
   system("D:/Stuff/Project1/Project1.exe");
   sleep 10;
}

or, if you need the return value from the application:

$status = 1;
while ($status)
{
   $retVal=`D:/Stuff/Project1/Project1.exe`;
   print "$retval\n";
   sleep 10;
}

Whitty
0
 

Author Comment

by:jvieira
ID: 2536120
Whitty,

maneshr answered the question first.

Joe
0
 

Author Comment

by:jvieira
ID: 2536121
I'm always making stupid mistakes like that.

Thanks,

Joe
0
 
LVL 16

Expert Comment

by:maneshr
ID: 2536156
i guess at some point of time, we all make stupid mistakes.

glad to be of help :-)
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