25 Jan
2018
25 Jan
'18
6:42 p.m.
So, while bringing up V6 on a hardware PDP-11/23 with an RK11 emulator using
an SD card for storage which Dave Bridgham and I are doing, I found this piece
of code in main() on V6 Unix:
rootdir = iget(rootdev, ROOTINO);
rootdir->i_flag =& ~ILOCK;
u.u_cdir = iget(rootdev, ROOTINO);
u.u_cdir->i_flag =& ~ILOCK;
I don't get why two separate calls to iget(), with the same arguments;
why not replace the second pair of lines with:
u.u_cdir = rootdir;
rootdir->i_count++;
What am I missing?
Noel