RE: Reading from STDIN from a pipe

[Gupta, Sharad]

try doing this:

sub {
        while ...
}

Look for the removed "()" around the declaration for sub, and u won't tell the sub 
that it takes no arguments.

-Sharad

-----Original Message-----
From: Jeff Westman [mailto:[EMAIL PROTECTED]
Sent: Tuesday, June 24, 2003 3:23 PM
To: beginners
Subject: Reading from STDIN from a pipe


Hi,

I am trying to get my script to be able to read from the command line
arguments as well as take input from a pipe.  This is what I have basically:

#----------------------- (begin) --------------------#
#!/bin/perl
use warnings;

sub parseFile()
{
    while (<F>) {
        # do some processing to the file
        #  ...
    }
}

if (@ARGV) {
    # this part works fine
    $file = shift;
    open(F, "< $file") or die "cannot open file $file: $!\n";
    parseFile(\*F);
    close(F);
}
else {
    # trying to read from a pipe, such as 'cat file | thisScript.pl'
    parseFile(\*STDIN);
}

#----------------------- (end) --------------------#

When I run this, as in 'cat myFile | thisScript.pl', I get:
Too many arguments for main::parseFile at ./x line 16, near "*F)"
Too many arguments for main::parseFile at ./x line 21, near "*STDIN)"

Help please.

Jeff



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