help adding a paramter to an executable i am running

rimuladas has asked for the wisdom of the Perl Monks concerning the following question:

#/usr/bin/perl -w;
system("C:\\WINDOWS\\System\\deltree.exe") == 0 or print STDERR "could
+nt exec foo: $!";
    system (deltree.exe)  or print STDERR "couldnt exec foo: $!";
[download]

i need to set a switch for deltree when it executes. its a "/y"

how do i acomplish this....im a newbie i suck!

2001-04-18 Edit by Corion : Added CODE tags

Comment on help adding a paramter to an executable i am running Download Code

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Re: help adding a paramter to an executable i am running by princepawn (Parson) on Apr 18, 2001 at 00:00 UTC
Hi, first use the CODE tag like this: `<code>` [download] to enclose your source code. I would recommend you type `perldoc perlfunc` [download] and read the docs on system. But in your case: `#!/usr/bin/perl use strict; my @args = ('C:\\WINDOWS\\System\\deltree.exe', '/y'); system @args == 0 or die "error: $!";` [download] should work.	[reply] [d/l] [select]
Re: help adding a paramter to an executable i am running by arturo (Vicar) on Apr 18, 2001 at 00:05 UTC
The array `@ARGV` holds the arguments you've passed to the script. So it's not that hard to handle this. Just add `my $extra_args; if ($ARGV[0] eq "/y") { $extra_args = "/y"; } system ("C:\\WINDOWS\\System\\deltree.exe $extra_args) and die "Couldn +'t delete tree: $!\n";` [download] That's pretty basic, though, and not terribly extensible; depending on the other features you want to add, you might step up to Getopt::Std or Getopt::Long to process command-line arguments. To extend things as they are, look into turning @ARGV into a space-separated string so you can pass a whole bunch of arguments to the deltree command. (I'll leave that up to you, as a nice learning exercise). Also note: `die STRING` is handier than `print STDERR STRING`. Furthermore, since you're on Windows (evidently) your #! line is nonsensical (but, in the current context, harmless). HTH Philosophy can be made out of anything. Or less -- Jerry A. Fodor	[reply] [d/l] [select]