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Submit #3261

closed

[PATCH] talkd: Find users for more than one talk request.

Added by dancrossnyc about 1 year ago. Updated about 1 year ago.

Status:
Resolved
Priority:
Normal
Assignee:
Category:
Userland
Target version:
Start date:
01/13/2021
Due date:
% Done:

0%

Estimated time:

Description

talkd was written to use `utmpentry` from `who`, which
caches the results of read the `utmpx` file. However,
talkd is usually invoked from inetd `wait` mode; it's
possible that a user might login after `talkd` starts;
with the cached utmpx data, one can't `talk` to that
user.

Further, consumption of the utmp data nulls it out for
subsequent requests. The result is that the first talk
succeeds, but subsequent requests fail.

The fix is to avoid using the `utmpentry` machinery,
and just read `utmp` directly every time we need to.


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