Date: Tue, 13 Apr 1999 15:09:16 -0500 From: Guy Helmer <ghelmer@scl.ameslab.gov> To: GVB <gvbmail@tns.net> Cc: freebsd-questions@freebsd.org Subject: Re: lastlog/wtmp reporting incorrect info... Message-ID: <Pine.SGI.4.05.9904131450540.26916-100000@demios.scl.ameslab.gov> In-Reply-To: <4.1.19990413101110.00b59e30@abused.com>
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On Tue, 13 Apr 1999, GVB wrote:
> I just upgraded a 2.2.8 machine to 3.1 and I am having problems with what
> looks like wtmp and lastlog. finger, w, and who are all reporting
> incorrect information about who is logged in, it is not updating correctly.
> Is this a know problem during the upgrade process? What can I do to fix it.
The longer user names in 3.x affect the leftover 2.x wtmp and lastlog
files. Maybe a Perl script like this would be able to convert 2.x wtmp
files to 3.x (no guarantees! I haven't tried running it!). Note that
your lastlog file is probably toasty -- you probably just need to "cp
/dev/null /var/log/lastlog" to clear it out.
#!/usr/bin/perl
#
# Usage: wtmp_convert /var/log/old-version2-wtmp /var/log/new-version3-wtmp
#
$wtmp2_template = 'A8 A8 A16 L';
$wtmp3_template = 'A8 A16 A16 L';
$wtmp2_struct_len = length(pack($wtmp2_template, '', '', '', 0));
$wtmp3_struct_len = length(pack($wtmp3_template, '', '', '', 0));
open(WTMP2, $ARGV[0]) || die "Error: couldn't open file $ARGV[0] : $!\n";
open(WTMP3, ">$ARGV[1]") || die "Error: couldn't open file $ARGV[1] : $!\n";
while (read(WTMP2, $wtmp2_buf, $wtmp2_struct_len) > 0) {
$wtmp3_buf = pack($wtmp3_template, unpack($wtmp2_template, $wtmp2_buf));
syswrite(WTMP3, $wtmp3_buf, $wtmp3_struct_len);
}
close(WTMP2);
close(WTMP3);
exit 0;
Guy Helmer, Ph.D. Candidate, Iowa State University Dept. of Computer Science
Research Assistant, Ames Laboratory --- ghelmer@scl.ameslab.gov
Research Assistant, Dept. of Computer Science --- ghelmer@cs.iastate.edu
http://www.cs.iastate.edu/~ghelmer
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