-#!/usr/local/bin/perl
-# Copyright (c) 2014 IndexData ApS. http://indexdata.com
+#!/usr/bin/perl
+# Copyright (c) 2014 Index Data ApS. http://indexdata.com
#
# bomb.pl - wrapper to stop a process after N seconds
#
use Getopt::Long;
+use POSIX ":sys_wait_h";
use strict;
use warnings;
my $debug = 0;
my $help;
my $timeout = 100;
+my $pid;
binmode \*STDOUT, ":utf8";
binmode \*STDERR, ":utf8";
-# timeout handler
-sub set_alarm {
- my $time = shift;
- my $message = shift || "";
-
- $time = 100 if !defined $time;
-
- $SIG{ALRM} = sub {
-
- warn "Time out alarm $time\n";
-
- # sends a hang-up signal to all processes in the current process group
- # and kill running java processes
- local $SIG{HUP} = "IGNORE";
- kill 1, -$$;
-
- local $SIG{TERM} = "IGNORE";
- kill 15, -$$;
- kill 15, -$$;
-
- warn "Send a hang-up to all childs.\n";
-
- #exit 1;
- };
-
- warn "set alarm time to: $time seconds $message\n" if $debug >= 1;
- alarm($time);
-}
-
sub usage () {
<<EOF;
usage: $0 [ options ] command args ....
GetOptions(
"help" => \$help,
"debug=i" => \$debug,
- "timeout=i" => \$timeout,
+ "timeout=f" => \$timeout,
) or die usage;
my @system = @ARGV;
die usage if $help;
die usage if !@system;
-set_alarm( $timeout, join( " ", @system ) );
+# set CPU limit, in case the alarm handler will
+# be ignored
+eval {
+ require BSD::Resource;
+ BSD::Resource::setrlimit( "RLIMIT_CPU", $timeout, 2 * $timeout )
+ or die "Cannot set CPU limit: $!\n";
+};
+if ($@) {
+ warn
+ "WARNING: things would go more nicely with the BSD::Resource package\n";
+}
+
+#
+# configure signal handlers
+#
+$SIG{ALRM} = sub {
+ my $pgid = getpgrp();
+
+ warn "Alarm handler got called after $timeout seconds\n";
+ warn "Kill now the process group $pgid\n\n";
+
+ # kill process group
+ kill "INT", -$pgid;
+};
+
+# don't kill ourself
+$SIG{INT} = "IGNORE";
+
+alarm($timeout);
system(@system) == 0
- or die "system @system failed: $?";
+ or die "system('@system') failed: ?='$?', !='$!', ^E='$^E'\n";
+
+1;
-exit(0);