[RndTbl] Linux "write"

[Trevor Cordes]

Can someone else confirm this bug on another Linux system, preferably a 
modern one that uses systemd?

In X, as non-root:

open a term (call it term1)
open another term (term2)
type "tty" in term2, not your tty number/string
in term1: type "write <your-login> <tty-string-from-above>"

replace your-login with the output of "who" if you don't know who you are 
logged in as

please try both /dev/pts/42 and pts/42 format for the tty part of write

example: write trevor pts/42

When I run this I get:
write: trevor is not logged in on pts/42

Even though I clearly am.  This used to work perfectly up until last year 
(I think), and I think systemd changed something (big surprise).  No 
chatter about this anywhere that I can see.  Probably the last person on 
earth to use write (at least on F24).

I found some other things to test that indicate that something is really 
amiss:

>write trevor
write: trevor has messages disabled

>mesg
is y

>mesg y
mesg
is y

>write trevor
write: trevor has messages disabled

>ll /dev/pts/42
crw--w---- 1 trevor tty 136, 42 Jun 28 02:48 /dev/pts/42


If someone else can confirm this bug on a non-Fedora (or a newer one) that 
would be great.  If someone can also confirm that the above behaviour is 
insane, that too would be great.  If anyone has some ideas on what to try 
next, shoot away!  Then I'll file a bz.  Thanks!