[Bug 196742] new feature for syslogd - obey mesg flag

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=196742

            Bug ID: 196742
           Summary: new feature for syslogd - obey mesg flag
           Product: Base System
           Version: 10.0-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: jef at mail.acme.com

Created attachment 151651
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=151651&action=edit
context diff for 10.0-R /usr/src/usr.sbin/syslogd/syslogd.c

Currently, when syslogd sends a message to a named user, all of that user's
logged-in sessions receive the message. This can be annoying. It would be
preferable to be able to designate one particular session to receive such
messages.

This patch changes syslogd so that when sending a message to a named user, it
obeys each session's mesg y/n setting. Sessions with mesg y get the message,
sessions with mesg n do not. The patch does not affect messages to everyone
("*"), those still go through regardless of mesg settings.

Please find attached a context diff against the 10.0-RELEASE version of
/usr/src/usr.sbin/syslogd/syslogd.c - it adds a wrapper routine that checks the
mesg flag, and calls it in the appropriate place.

I have been using this patch since FreeBSD 4 in 2004, and it seems like time to
try and get it into the release.

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