22 Oct
2019
22 Oct
'19
8:22 p.m.
On a somewhat related note, if someone could shine some light on, if such
chdir() which wasn't yet integrated into the shell function independent of
fork() as in did fork() just spawn off a new child shell if one did chdir()
or more generally how did processes interact when/if more than one child
existed. I know PDP-7 had some archaic IPC but haven't gotten around to
grokking fork.s or others to understand the actual operation.
On Tue, 22 Oct 2019 at 7:06 PM, Noel Chiappa <jnc(a)mercury.lcs.mit.edu>
wrote:
--
Abhinav Rajagopalan
From: Sean
Dwyer
chdir seems to be a syscall in 7 (sys4.c)
It's been a system call forever, see e.g.:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=V1/man/man2/chdir.2
(And the working dir was a property of the process, not data in the shell.)
Noel