sub exec_safe {
	my @cmd; # Return variable
	eval {
		local $SIG{ALRM} = sub { die "Timeout\n" };
		alarm $_[1];
		@cmd = `nice -n $_[2] $_[0]`;
		alarm 0;
	};
	if($@) { # If command fails, return non-zero and msg
		return ("Command timeout",1);
	} else {
		chomp @cmd; push(@cmd,$? >> 8);
		return @cmd;
	}
}