Move problem 1-2 (join) into project 2 as the "wait" system call.
[pintos-anon] / src / lib / user /
drwxr-xr-x   ..
-rw-r--r-- 2002 console.c
-rw-r--r-- 157 entry.c
-rw-r--r-- 4675 syscall.c
-rw-r--r-- 818 syscall.h