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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
package Echolot::Commands;
# (c) 2002 Peter Palfrader <peter@palfrader.org>
# $Id: Commands.pm,v 1.3 2002/07/02 17:03:13 weasel Exp $
#
=pod
=head1 Name
Echolot::Commands - manage commands like add key, set ttl etc.
=head1 DESCRIPTION
This package provides functions for sending out and receiving pings.
=cut
use strict;
use warnings;
use Carp qw{cluck};
use Fcntl ':flock'; # import LOCK_* constants
use Fcntl ':seek'; # import LOCK_* constants
use English;
sub addCommand($) {
my ($command) = @_;
my $filename = Echolot::Config::get()->{'commands_file'};
open(FH, ">>$filename" ) or
cluck("Cannot open $filename for appending $!"),
return 0;
flock(FH, LOCK_EX) or
cluck("Cannot get exclusive lock on $filename: $!"),
return 0;
print FH $command,"\n";
flock(FH, LOCK_UN) or
cluck("Cannot unlock $filename: $!");
close(FH) or
cluck("Cannot close $filename: $!");
};
sub processCommands($) {
my $filename = Echolot::Config::get()->{'commands_file'};
(-e $filename) or
return 1;
my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size, $atime,$mtime,$ctime,$blksize,$blocks)= stat $filename;
($size > 0) or
return 1;
open(FH, "+<$filename" ) or
cluck("Cannot open $filename for reading: $!"),
return 0;
flock(FH, LOCK_EX) or
cluck("Cannot get exclusive lock on $filename: $!"),
return 0;
while (<FH>) {
chomp;
my ($command, @args) = split;
if ($command eq 'add') {
Echolot::Globals::get()->{'storage'}->add_address(@args);
} elsif ($command eq 'set') {
Echolot::Globals::get()->{'storage'}->set_stuff(@args);
} else {
warn("Unkown command: $_\n");
};
};
seek(FH, 0, SEEK_SET) or
cluck("Cannot seek to start $filename $!"),
return 0;
truncate(FH, 0) or
cluck("Cannot truncate $filename to zero length: $!"),
return 0;
flock(FH, LOCK_UN) or
cluck("Cannot unlock $filename: $!");
close(FH) or
cluck("Cannot close $filename: $!");
};
1;
# vim: set ts=4 shiftwidth=4:
|
