From Newsgroup: comp.lang.c

On Mon, 10 Nov 2025 16:54:44 -0000 (UTC), Lew Pitcher wrote:

So it appears that SIG_IGN and SIG_DFL were formalized as part of
7th Edition Unix.

This came out in 1979, according to <https://wiki.tuhs.org/doku.php?id=systems:7th_edition>. That was
nearly 4 years after the 6th edition <https://wiki.tuhs.org/doku.php?id=systems:6th_edition>.

What happened in-between? The porting effort to the Interdata 8/32 was
one thing. That would have flushed out a whole bunch of PDP-11-isms
from the source code and APIs.
--- Synchronet 3.21a-Linux NewsLink 1.2