Yes, the is_dos_format() is smashing $_ in your grep block. The easy fix is to either local()ize $_ in the function or use a different variable in your while loop:
sub is_dos_format {
local $_;
...
}
# or
sub is_dos_format {
...
while (my $line = <RJA>) {
...
}
Jeff japhy Pinyan,
P.L., P.M., P.O.D, X.S.:
Perl,
regex,
and perlhacker How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart