This is really basic stuff, and you should really grab
a book (Learning Perl or Programming Perl for example)
or even have a look at the docs.
Now for the task at hand just use:
#!/bin/perl -w
use strict;
my $file= shift or die "usage $0 <file>";
open( FILE, "<$file") or die "cannot open $file: $!";
while( my $device_id= <FILE>)
{ chomp $device_id; # removes the end of line
unless( $device_id=~ /^\d{10}$/)
{ die "invalid device id: $device_id"; }
# do your stuff here
}
Just make sure you understand what the code does before
and why you should write it along those lines before
using it.
Update: Oh my god! There is no review for Programming
Perl in the review section, link removed. Somebody _please_
post a review!
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