#!/usr/bin/perl -w

# mboxsplit - split a mailbox into separate files
#
# Copyright (C) 2002  Daniel Quinlan
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of either the Artistic License or the GNU General
# Public License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.

my $prog = $0;
$prog =~ s@.*/@@;

use vars qw($opt_h $opt_f $opt_n);
use Getopt::Std;
getopts("hf:n:");

sub usage {
    my $status = shift;

    my $out = $status ? STDERR : STDOUT;
    print $out <<EOF;
usage: $prog [options] [mbox folders]

 -h         print this help
 -f format  set printf string to format
 -n n       set initial sequence number to n

mboxsplit splits mbox folders into separate files.  If no mbox folders
are specified, standard input is used.

"format" is a string formatted using the sprintf format used by Perl.
It should include a "%d" or other integer directive which will be
replaced by a sequence number (starting with 1 and counting upwards).
The default is "%d".

EOF
    exit($status);
}

usage(0) if $opt_h;

if (! $opt_f) {
    $opt_f = "%d";
}

my $file_no = defined($opt_n) ? $opt_n : 1;
my $file_open = 0;

while ($line = <>) {
    if ($file_open == 1 && $line =~ /^From /) {
	close(OUTFILE);
	$file_no = $file_no + 1;
	$file_open = 0;
    }
    if ($file_open == 0) {
	open(OUTFILE, '>' . sprintf($opt_f, $file_no));
	$file_open = 1;
    }
    print OUTFILE $line;
}

if ($file_open == 1) {
    close(OUTFILE);
}