System call input and output files

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

Dear Monks,

I am looking for an ‘off the shelf’ method to enable a user of a Perl program to specify the flat file name to be read by the Perl program and the output file name to be produced by the program. This should be specifiable in the system call. Can anyone point me in the direction of examples of good practice in relation to this?

Comment on System call input and output files

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Re: System call input and output files by gellyfish (Monsignor) on Dec 09, 2004 at 12:02 UTC
You are looking at either accessing the command line arguments directly in the `@ARGV` array or using a module such as (the standard) Getopt::Std or Getopt::Long /J\	[reply] [d/l]
Re: System call input and output files by zentara (Cardinal) on Dec 09, 2004 at 12:07 UTC
"Off the shelf" ? You mean you want someone to write it for you for free? To pass files to a perl script, you read it's arguments. `myperlscript inputfile outputfile` [download] In myperscript `#!/usr/bin/perl use warnings; use strict; my $inputfile = $ARGV[0]; my $outputfile = $ARGV[1]; print "$inputfile\t$outputfile\n"; #or process them here` [download] To run it thru system: `system( "myperlscript $inputfile $outputfile");` [download] I'm not really a human, but I play one on earth. flash japh	[reply] [d/l] [select]
Re: System call input and output files by Happy-the-monk (Canon) on Dec 09, 2004 at 12:03 UTC
`die qq(usage: $0 infile outfile\n) unless @ARGV == 2; my ( $infile, $outfile ) = @ARGV; open ( IN, "< $infile ... open ( OUT, "> $infile ...` [download] Cheers, Sören	[reply] [d/l]