Printing to STDIN? 1

[jvchamary]

Hello!

Quick question... I'm currently using a program that asks for user input via STDIN, but I'd like to run it non-interactively from a perl script. I had hoped that the following would work, but it doesn't...

print(STDIN "input\n");

Thanks in advance for your help!

JVC.

 

[KevinADC]

I do not understand your question. Specifically:

but I'd like to run it non-interactively from a perl script.

What do you mean by non-interactively?

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- Kevin, perl coder unexceptional!

 

[brigmar]

You should be sending your outputs to STDOUT/STDERR or some other filehandle as opposed to STDIN.

 

[KevinADC]

maybe he wants to use command line arguments?

perl programname.pl foo bar





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- Kevin, perl coder unexceptional!

 

[feherke]

Hi

Maybe this ?

#!/usr/bin/perl
open C,"|[green][i]program_to_run_non_interactively[/i][/green]";
print C "[green][i]data which should be keyed in[/i][/green]";
close C;

Feherke.

http://rootshell.be/~feherke/

 

[MillerH]

This is probably what you ultimately want:

http://search.cpan.org/search?query=Expect

- Miller

 

[jvchamary]

.

KevinADC, yes, ideally I'd have preferred to use command line arguments and then execute via e.g. a 'system' call. However, the programme that I'd like to run "non-interactively", has already been conveniently provided as a binary. In principle, I could modify the source and then re-compile it myself, but I was confident that you guys would have a more elegant solution using perl

brigmar, yes, of course I should've realised that STDIN would be 'reserved' for, well, standard input! Which leads on to...

feherke, yes, that's precisely what I wanted, THANKS!

MillerH, feherke's answer worked for me, but thanks anyway
.