trace opened files for all processes in osx

filetrace.d

#!/usr/sbin/dtrace -s
syscall::open*:entry {
    this->exe= execname;
    this->file= copyinstr(arg0);
    this->mode= arg1;
}
syscall::open*:return {
    printf("%4d (%4d) %-20s\tM%07o  %s",arg0, errno, this->exe, this->mode, this->file);
}