109 lines
2.3 KiB
Perl
Executable File
109 lines
2.3 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 "all";
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use utf8;
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use open qw(:std :utf8);
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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 (/\//, abs_path ($0));
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if ($#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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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 conf qw(loadConf);
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use botlib qw(logger);
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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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$| = 1;
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my $runAsUid = $<;
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my $piddir = "/var/run/" . basename (abs_path ($0));
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my $C = loadConf ();
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# if we run under root, create pid dir and set correct owner for it
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if ($< == 0) {
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my $user = $C->{user};
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die "Unable to run as root, please define unprivileged user in config.json\n" unless (defined ($user));
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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 => $gid
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}
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);
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}
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if ($C->{'debug_log'}) {
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unless (-d dirname($C->{'debug_log'})) {
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make_path (
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dirname($C->{'debug_log'}), {
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uid => $uid,
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group => $gid
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}
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);
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}
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}
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# script intended to run as "unit" user, so drop privs to "unit" user
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setgid ($gid) or die "Unable to switch to group of $user($!)\n";
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setuid ($uid) or die "Unable to switch to account $user($!)\n";
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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 $pidfile;
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if ($runAsUid == 0) {
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# TODO: handle case where we run with unpriv. user
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$pidfile = sprintf ("%s/%s.pid", $piddir, basename (abs_path ($0)));
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logger ("Creating pidfile at $pidfile");
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open (PID, ">", $pidfile) or die "Error opening $pidfile: $!\n";
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print PID $$ or die "Error writing to $pidfile: $!\n";
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close PID;
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}
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# set correct proctitle
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$0 = abs_path ($0);
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# run bot, at last
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run_telegrambot ();
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unlink ($pidfile) if (-f $pidfile);
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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");
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open (STDOUT, ">", "/dev/null");
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open (STDERR, ">", "/dev/null");
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__fork ();
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umask 0;
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}
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sub __fork () {
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my $pid = fork;
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die "Can't fork: $!\n" unless (defined ($pid));
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exit if ($pid != 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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