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|
#!/usr/bin/env perl
# UDP Server
# Copyright 2025 Bob Proulx <[email protected]>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# Ensure a standard behavior regardless of caller locale setting.
$ENV{'LC_ALL'} = "C";
use POSIX;
use IO::File;
use IO::Socket::INET6;
use Getopt::Long;
use strict;
use warnings FATAL => 'all';
use constant PORT => 9417;
use constant MAX_MSG_LEN => 4096;
my $progname = "git-repos-notify-catcher";
my $debug = 0;
my $verbose = 0;
my $version = '@VERSION@';
my $help = 0;
my $just_print = 0;
my $print_version = 0;
my $foreground = 0;
my %sessions; # hash of server sessions indexed by socket
sub sighandler {
my $sig = shift;
STDERR->print("$progname: signal $sig received, cleaning up.\n");
$SIG{$sig} = 'DEFAULT';
kill($sig,$$);
}
sub print_short_usage {
print $progname, ": Use --help to give you more information.\n";
}
sub print_help {
print <<'EOF';
Usage: git-repos-notify-catcher [options]
A test UDP server in perl.
--help print this help message
--version print program version
-d,--debug debug messages on
-v,--verbose verbose messages on
-f,--foreground run in foreground instead of background
Examples:
$ git-repos-notify-catcher
Report bugs to Bob Proulx <[email protected]>.
EOF
}
sub print_version {
print "$progname $version\n";
print <<'EOF';
Copyright (C) 2025 Bob Proulx.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by Bob Proulx <[email protected]>.
EOF
}
sub process_options {
$Getopt::Long::bundling = 1;
$Getopt::Long::order = $REQUIRE_ORDER;
my %longopts = (
"d" => \$debug,
"debug" => \$debug,
"help" => \$help,
"v" => \$verbose,
"verbose" => \$verbose,
"version" => \$print_version,
"f" => \$foreground,
"foreground" => \$foreground,
);
if (!&GetOptions(%longopts)) {
warn $progname, ": invalid command line option\n";
&print_short_usage();
return undef;
}
if ($help) {
&print_help();
exit(0);
}
if ($print_version) {
&print_version();
exit(0);
}
return 1;
}
sub daemon {
chdir("/");
umask(02);
my $maxpid = 1024;
for (my $fd = 0; $fd <= $maxpid; ++$fd) {
POSIX::close($fd);
}
open(STDIN,"</dev/null");
open(STDOUT,">/dev/null");
open(STDERR,">&STDOUT");
#open(STDOUT,">>/var/tmp/git-repos-notify-catcher.out");
#open(STDERR,">&STDOUT");
POSIX::setsid() or die "setsid: $!\n";
my $pid = fork();
exit(0) if $pid;
}
sub main {
$SIG{'HUP'} = \&sighandler;
$SIG{'INT'} = \&sighandler;
$SIG{'QUIT'} = \&sighandler;
$SIG{'TERM'} = \&sighandler;
&process_options();
if (!$foreground) {
&daemon();
}
my $sock = IO::Socket::INET6->new(LocalPort => PORT,
Proto => 'udp')
or die $@;
my $msg;
for (;;) { # loop forever
if (!$sock->recv($msg,MAX_MSG_LEN)) {
next;
}
chomp($msg);
warn "INPUT: $msg\n" if $debug;
system("git-repos-updater",$msg) == 0
or warn "git-repos-updater: $?\n";
}
return 0;
}
if (__FILE__ eq $0) {
exit(&main(@ARGV));
}
1;
|
