don't cache the outputs
avoid a off by one leading to a segfault
add suggested parenthesis around binary operation
One step toward tracing multithreaded applications

- Pass PTRACE_O_TRACESYSGOOD so that syscall-stops can be
  distinguished from other events
- Option __WALL to the (too numerous) waitpid calls
- Have the waitpid status stored within the proc descriptor
kill the horrific 'proc->in_syscall = 2'

That was actually to skip a PTRACE_EVENT_EXEC event.
allow runners (valgrind/gdb) in scripts
merge execve_{pre,post}