1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
# ex:ts=8 sw=4:
# $OpenBSD: Whatis.pm,v 1.3 2005/03/05 11:02:35 espie Exp $
# Copyright (c) 2000-2004 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
use strict;
use warnings;
package OpenBSD::Makewhatis::Whatis;
use constant MAXLINELEN => 8192;
use File::Temp qw/tempfile/;
use File::Compare;
# write($list, $dir):
#
# write $list to file named $file, removing duplicate entries.
# Change $file mode/owners to expected values
# Write to temporary file first, and do the copy only if changes happened.
#
sub write
{
my ($list, $dir) = @_;
my $f = "$dir/whatis.db";
my ($out, $tempname);
($out, $tempname) = tempfile('/tmp/makewhatis.XXXXXXXXXX') or die "$0: Can't open temporary file";
my @sorted = sort @$list;
my $last;
while (my $l = shift @sorted) {
next if length $l > MAXLINELEN;
print $out $l, "\n" unless defined $last and $l eq $last;
$last = $l;
}
close $out;
if (compare($tempname, $f) == 0) {
unlink($tempname);
} else {
require File::Copy;
unlink($f);
if (File::Copy::move($tempname, $f)) {
chmod 0444, $f;
chown 0, (getgrnam 'bin')[2], $f;
} else {
print STDERR "$0: Can't create $f ($!)\n";
unlink($tempname);
exit 1;
}
}
}
1;
|
