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How do I pass the return(or enter) key into a command line?

swabbies
Novice

May 12, 2003, 12:06 PM

Post #1 of 3 (282 views)

How do I pass the return(or enter) key into a command line?	Can't Post

hello,

I am trying to write a script that passes input to a win32 cmd line.

open(CDB,"|cdb.exe frsstress.exe /cfgfile stress.xml") or die "Unable to start ntsd...";

sleep(30);
print "g"; ###what I want to do here is pass the letter "g" and then enter(return)
sleep(15);
print "g"; ###what I want to do here is pass the letter "g" and then enter(return)
sleep(60);
print "q";

Any input would be greatly appreciated.

thanks,

Ben

davorg
Thaumaturge / Moderator

May 13, 2003, 1:16 AM

Post #2 of 3 (277 views)

Re: [swabbies] How do I pass the return(or enter) key into a command line? [In reply to]	Can't Post

It's not clear what you're asking, but I assume that you want to pass these values into the command line pipe that you've opened up.

In that case you'll need something like this:

Code

sleep(30); 
print CDB "g\n"; 
sleep(15); 
print CDB "g\n"; 
sleep(60); 
print CDB "q\n";

But you may have more success using something like Expect.pm.

--
Dave Cross, Perl Hacker, Trainer and Writer
http://www.dave.org.uk/
Get more help at Perl Monks

swabbies
Novice

May 13, 2003, 7:23 AM

Post #3 of 3 (272 views)

Re: [swabbies] How do I pass the return(or enter) key into a command line? [In reply to]	Can't Post

thanks for the reply, I should have been clear with my intent. The code in the previous post works when there is a cmd line present. The strange feature of the .exe that I use is that the letter "q" acts as a break, so the .exe is running and there is no cmd line to enter the lettter "q" into. Is there a way to pass it to the .exe without having a cmd line to enter it onto?

The original question wasn't clear, but I am looking for a way to have the return or enter key passed into the cmd line. so I could pass it the lettter "g" and then pass the return or enter key to execute the letter
"g".

Thanks,

Ben

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