in rcinputproc
s = setecho(sfd, 0);
if(write(rcfd, pair.s, pair.ns) < 0)
threadexitsall(nil);
if(s)
setecho(sfd, s);
there's a race between setting echo off, writing to rcfd, resetting echo and
the reader of the other side of rcfd. a sleep(1) before if(s) makes it less
frequent
because the reader gets to read the data in the right mode.
i haven't really looked at what linux is doing that allows that,
or what changed between revisions.
it's not my observation, it was on a list or issue comment somewhere,
presumably for p9p. i can't find the bookmark.
