use strict;
use Getopt::Long;
+use POSIX;
my ($pintos) = "pintos";
my ($os_disk) = "../../src/userprog/build/os.dsk";
sub xsystem {
my ($cmd) = @_;
print "$cmd\n";
- system ($cmd) == 0 || die "command failed\n";
+ system ($cmd) == 0 or die "command failed\n";
}