153 lines
3.7 KiB
Perl
Executable File
153 lines
3.7 KiB
Perl
Executable File
#!/usr/bin/perl
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use 5.018;
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use strict;
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use warnings;
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use utf8;
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use open qw(:std :utf8);
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use English qw( -no_match_vars );
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use version; our $VERSION = qw(1.0);
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my $workdir;
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# before we run, change working dir
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BEGIN {
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use Cwd qw(chdir abs_path);
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my @CWD = split /\//xms, abs_path ($PROGRAM_NAME);
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if ($#CWD > 1) { $#CWD = $#CWD - 2; }
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$workdir = join '/', @CWD;
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chdir $workdir;
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}
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use lib ("$workdir/lib", "$workdir/vendor_perl", "$workdir/vendor_perl/lib/perl5");
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no Cwd;
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use Cwd::utf8 qw(chdir abs_path);
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use POSIX qw(setgid setuid setsid);
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use File::Path qw(make_path);
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use File::Basename qw(basename dirname);
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use Log::Any::Adapter;
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use Log::Any::For::Std;
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use conf qw(loadConf);
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use telegrambot qw(run_telegrambot);
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sub daemonize;
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sub __fork;
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sub __signal_handler;
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local $OUTPUT_AUTOFLUSH = 1;
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my $runAsUid = $UID;
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my $piddir = '/var/run/' . basename (abs_path ($PROGRAM_NAME));
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my $C = loadConf ();
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my $logfile;
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if (defined $C->{'log'}) { $logfile = $C->{'log'}; }
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elsif (defined $C->{'debug_log'}) {$logfile = $C->{'debug_log'}; }
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# if we run under root, create pid dir and set correct owner for it, same for debug log if it is defined
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if ($UID == 0) {
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my $user = $C->{user};
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unless (defined $user) {
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die "Unable to run as root, please define unprivileged user in config.json\n";
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}
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my ($uid, $gid) = (getpwnam $user)[2,3];
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unless (-d $piddir) {
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make_path (
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$piddir, {
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uid => $uid,
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group => $gid
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}
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);
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}
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if (defined $logfile) {
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my $logdir = dirname ($logfile);
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unless (-d $logdir) {
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make_path (
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$logdir, {
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uid => $uid,
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group => $gid
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}
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);
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}
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die "Unable to create $logdir" unless (-d $logdir); ## no critic (ErrorHandling::RequireCarping)
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}
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# drop privs
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setgid ($gid) or die "Unable to switch to group of $user($OS_ERROR)\n";
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setuid ($uid) or die "Unable to switch to account $user($OS_ERROR)\n";
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} else {
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$piddir = $workdir;
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}
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if (defined $logfile) {
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Log::Any::Adapter->set ('File', $logfile);
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} else {
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Log::Any::Adapter->set ('File', '/dev/null');
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}
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# double fork attach to /dev/null all stdio and go background
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daemonize ();
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# write pidfile
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my $apath = abs_path $PROGRAM_NAME;
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unless (defined $apath) {
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die "[FATAL] Unable to get abs_path: $OS_ERROR\n";
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};
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# write pidfile
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my $pidfile = sprintf '%s/%s.pid', $piddir, basename $apath;
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warn "[INFO] Creating pidfile at $pidfile\n";
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open my $MYPID, '>', $pidfile or die "[FATAL] Error opening $pidfile: $OS_ERROR\n";
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print {$MYPID} $PID or die "[FATAL] Error writing to $pidfile: $OS_ERROR\n";
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close $MYPID; ## no critic (InputOutput::RequireCheckedSyscalls
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local $SIG{INT} = \&__signal_handler;
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local $SIG{TERM} = \&__signal_handler;
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# set correct proctitle
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$PROGRAM_NAME = abs_path $PROGRAM_NAME; ## no critic (Variables::RequireLocalizedPunctuationVars)
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# run bot, at last
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run_telegrambot ();
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if (-f $pidfile) {
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unlink $pidfile;
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}
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exit 0;
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sub daemonize {
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__fork ();
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POSIX::setsid ();
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open STDIN, '<', '/dev/null'; ## no critic (InputOutput::RequireCheckedSyscalls, InputOutput::RequireCheckedOpen)
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# we handle STDOUT && STDERR via Log::Any::For::Std, so do not close them explicitly
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#open STDOUT, '>', '/dev/null'; ## no critic (InputOutput::RequireCheckedSyscalls, InputOutput::RequireCheckedOpen)
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#open STDERR, '>', '/dev/null'; ## no critic (InputOutput::RequireCheckedSyscalls, InputOutput::RequireCheckedOpen)
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__fork ();
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umask 0;
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return;
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}
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sub __fork {
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my $pid = fork;
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unless (defined $pid) { die "[FATAL] Can't fork: $OS_ERROR\n"; }
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exit if ($pid != 0);
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return;
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}
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sub __signal_handler {
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warn "[INFO] Caught a signal $OS_ERROR\n";
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unlink $pidfile if (-f $pidfile);
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exit 0;
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}
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__END__
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# vim: set ft=perl noet ai ts=4 sw=4 sts=4:
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