bin/108743: who(1): IPv6 addresses truncated to maximum IPv4
address length
Mike Sweetser - Adhost
mikesw at adhost.com
Wed Oct 17 18:50:04 PDT 2007
The following reply was made to PR bin/108743; it has been noted by GNATS.
From: "Mike Sweetser - Adhost" <mikesw at adhost.com>
To: <bug-followup at FreeBSD.org>,
<Net147 at hotmail.com>
Cc:
Subject: Re: bin/108743: who(1): IPv6 addresses truncated to maximum IPv4 address length
Date: Wed, 17 Oct 2007 18:28:06 -0700
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What gets broken in the ABI? I'm currently testing this myself with a
UT_HOSTSIZE of 64, and thus far I haven't encountered any problems.
Fixing UT_HOSTSIZE fixes "who", but does not fix "w", which uses its own
W_DISPHOSTSIZE variable to define the displayed width of the host as 16.
This is not changed with UT_HOSTSIZE (although it does recognize
UT_HOSTSIZE when it comes to actually looking up the utmp structure).
One solution is to change W_DISPHOSTSIZE to 40+ and recompile, which
will widen the display and display IPv6 properly.
I've attached a patch that adds a -W flag for "w", which expands the
size to 40; leaving the flag off will default it to the original 16. =20
(This is the first time I've submitted a patch of this nature, so if
this needs to be done differently, please let me know :)
Mike Sweetser
--------------------------
Mike Sweetser | Systems Administrator
Adhost Internet
140 Fourth Avenue North, Suite 360, Seattle, Washington 98109 USA
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