1# ex:ts=8 sw=4:
2# $OpenBSD: Mtree.pm,v 1.14 2023/06/13 09:07:17 espie Exp $
3#
4# Copyright (c) 2004-2005 Marc Espie <espie@openbsd.org>
5#
6# Permission to use, copy, modify, and distribute this software for any
7# purpose with or without fee is hereby granted, provided that the above
8# copyright notice and this permission notice appear in all copies.
9#
10# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
18use v5.36;
19
20package OpenBSD::Mtree;
21use File::Spec;
22
23# read an mtree file, and produce the corresponding directory hierarchy
24
25sub parse_fh($mtree, $basedir, $fh, $h = undef)
26{
27	while(<$fh>) {
28		chomp;
29		s/^\s*//o;
30		next if /^\#/o || /^\//o;
31		s/\s.*$//o;
32		next if /^$/o;
33		if ($_ eq '..') {
34			$basedir =~ s|/[^/]*$||o;
35			next;
36		} elsif (m/^\//) {
37			$basedir = $_;
38		} else {
39			$basedir.="/$_";
40		}
41		$_ = $basedir;
42		while (s|/\./|/|o)	{}
43		if (defined $h) {
44			$mtree->{File::Spec->canonpath($_)} //= {};
45		} else {
46			$mtree->{File::Spec->canonpath($_)} = 1;
47		}
48	}
49}
50
51sub parse($mtree, $basedir, $filename, $h = undef)
52{
53	open my $file, '<', $filename or die "can't open $filename: $!";
54	parse_fh($mtree, $basedir, $file, $h);
55	close $file;
56}
57
581;
59