Depending on the size of the file, you may exhaust the machine's memory allocated
to disk buffering, which means that if you use File::Copy you will physically
reread the same disk sectors over and over again. If this is true, the most effecient
method of writing to multiple files would be to read a line, and write it out to all
the output files. Something like:
my %fd = (
'file1' => 'fd1',
'/tmp/foo => 'fd2',
'/home/me/file' => 'fd3',
);
my $in = shift || die "No file specified.\n";
open IN. $in or die "Cannot open $in for input: $!\n";
foreach( keys %fd ) {
open $fd{$_}, ">$_" or die "Cannot open $_ for output: $!\n";
}
while( <IN> ) {
foreach my $fd( keys %fd ) {
print $fd $_;
}
}
foreach( keys %fd ) {
close $fd{$_};
}
-- g r i n d e r
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