From owner-freebsd-questions  Wed Jun  2  8:40:27 1999
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Date: Wed, 2 Jun 1999 10:40:15 -0500 (CDT)
From: Joseph Davida <jd@davida.com>
Message-Id: <199906021540.KAA04706@davida.com>
To: questions@freebsd.org
Subject: command who (and w)
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	In releases 2.x, who and w would show the fully qualified
	hostname of all users who login from a remote host.
	If the fully qualified name is too long for display, then
	the IP address would get printed. For example on 2.2.1:

user1	ttyp1	Jun  2 07:29   (relay.mfa.com)
user2	ttyp2	Jun  2 08:06   (204.154.227.254)

	In 3.2, 'who' no longer prints the IP address if the
	fully qualified hostname is too long. It just truncates the
	name. For example:

roger            ttyp3   Jun  2 10:00	(xxxxxx.xxxxxxx)

	(Name of remote host replaced char for char with an x to
	 keep the confidentiality of the user's host name.
	 Roger is also a fictitious user name).

	As you can see, it truncated the .com from the hostname.
	Other commands suffer the same behavior:
	last, finger.

	The odd behavior is that if the hostname is really long,
	such as <some_slip_connection>.worldnet.att.net,
	then in 3.2, 'who' does resort to printing the IP address.

	Many user shell scripts which relied on getting either the
	IP address or the fully qualified hostname from the who
	command will no longer work if the hostname falls within
	certain (unknown) length ranges. Machine I am on does not
	keep sources online, so I will have to lookup the who source
	code on another machine.


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