access(2) alarm(2) pause(2) were not ported from pwb to v7

access(2) alarm(2) pause(2) were not ported from pwb to v7

Alan Glasser describes the incident that led to access(2) in
https://minnie.tuhs.org/pipermail/tuhs/2021-November/024657.html

access(2) alarm(2) pause(2) were also part of the "50 changes" tape

post v6 "50 bugs" / "diff tape" / "50 fixes" tape (Salus QCU, pp 138-139)
"fifty changes" tape
https://www.oreilly.com/openbook/opensources/book/kirkmck.html

"50 changes"
https://archive.org/details/unix_news_november-1976

tuhs/Applications/Spencer_Tapes/unsw3.tar.gz
usr/sys/v6unix/changenotes

45) The "access()" system call checks access permissions on the real
id's of the process regardless of the effective ones.  Doesn't return
stats, just does an internal "access()" to set u.u_error.

48) "alarm()" and "pause()" system calls are in to provide a user-mode
timeout capability.

with and ok schwarze@