Opening external files with arguements

void_Anthony() has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Opening external files with arguements by Transient (Hermit) on Apr 28, 2005 at 15:42 UTC
Are you trying to pass arguments to a command? I don't see why you would be passing arguments to a "file" you want to read from.	[reply]
Re^2: Opening external files with arguements by void_Anthony() (Acolyte) on Apr 28, 2005 at 15:51 UTC
It is a simple test program. Basicically, whatever number is entered as the arguement, the program merely spits it back out. I want to be able to specify what arguements are passed to the program so I can get the appropriate output of that program and use it in my perl code. Preferably, I would like the arguement passed to be a variable I will have earlier declared in the code.	[reply]
Re^3: Opening external files with arguements by blazar (Canon) on Apr 28, 2005 at 16:01 UTC
Then again open as of the documentation or "more simply" `qx//`, aka 'backticks', which personally I don't like. Remote chances are that you may be interested in IPC::Open2 or IPC::Open3 as well.	[reply] [d/l]
Re^3: Opening external files with arguements by Transient (Hermit) on Apr 28, 2005 at 15:54 UTC
Ahh, so you want to be able to call this program with arguments, then? Have you tried qx//?	[reply]
Re^3: Opening external files with arguements by holli (Abbot) on Apr 28, 2005 at 18:55 UTC
It is a simple test program. Post your code. That will help a lot. holli, /regexed monk/	[reply]
Re^4: Opening external files with arguements by void_Anthony() (Acolyte) on Apr 29, 2005 at 19:26 UTC
Re: Opening external files with arguements by blazar (Canon) on Apr 28, 2005 at 15:32 UTC
Sorry, I can't understand what you mean. Care to expand? FWIW: `#!/usr/bin/perl use strict; use warnings; my $file=shift or die "Usage: $0 <file>"; open my $fh, $file or die $!; print scalar <$fh>; __END__` [download] Can be used e.g. like thus: `$ ./foo.pl 'ls\|' 449133.pl` [download] (But then this is precisely the reason why I prefer the three args form of `open()` - there are situations in which you may want to do exactly the above, though!)	[reply] [d/l] [select]
Re^2: Opening external files with arguements by void_Anthony() (Acolyte) on Apr 28, 2005 at 15:42 UTC
Three arguements form? Would you mind giving me a (simple) example?	[reply]
Re^3: Opening external files with arguements by blazar (Canon) on Apr 28, 2005 at 15:52 UTC
Three arguements form? Would you mind giving me a (simple) example? I must say i'm tempted to say: no! For I'm not here (and nobody is) to replace the best tool to answer this kind of questions, that is Perl's excellent documentation. However... `open my $fh, '\|-', "whatever" or die $!; # or open my $fh, '\|-', "whatever", @more_args or die $!;` [download]	[reply] [d/l]
Re^2: Opening external files with arguements by void_Anthony() (Acolyte) on Apr 28, 2005 at 15:36 UTC
`some code... open("specified file" arguements?) ^Quotes not included ^I don't know some more code...` [download]	[reply] [d/l]
Re^3: Opening external files with arguements by blazar (Canon) on Apr 28, 2005 at 15:40 UTC
`some code... open("specified file" arguements?) ^Quotes not included ^I don't know some more code...` [download] Huh?!? Is this supposed to be Perl? Have you tried open? What should these "arguements" you keep talking about be?	[reply] [d/l]


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