01-28-2015
who reads the /var/log/utmp (and others) file for login information.
So, I cannot assume anything but that those are valid login records.
The only way to test that is to manually kill off the fake* family of process, run who to be sure you got them all, log on ONCE using faketester, verify with who. If this pans out, then you need to consider who output authoritative. It always is unless some process tinks with files in /var/log.
Go from that point with your experimenting.
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UTMPX(5) BSD File Formats Manual UTMPX(5)
NAME
utmpx -- user accounting database
SYNOPSIS
#include <utmpx.h>
DESCRIPTION
In contrast to utmp and wtmp, the extended databases in utmpx and wtmpx reserve more space for logging hostnames, and also information on a
process' ID, termination signal and exit status.
The <utmpx.h> header defines the structures and functions for logging user. Currently logged in users are tracked in /var/run/utmpx. The
interface to the utmpx file is described in endutxent(3). The file is not automatically created if they do not exist; it must be created
manually.
Traditionally, separate files would be used to store the running log of the logins and logouts (wtmpx), and the last login of each user
(lastlogx). With the availability of the Apple system log facility asl(3), these separate files can be replace with log entries, which are
automatically generated when utmpx entries are written. The API to access the logins and logouts is described in endutxent_wtmp(3) while the
last login info is accessible with getlastlogx(3).
For compatibility, changes to utmpx are reflected in utmp(3) (in the utmp, wtmp and lastlog files), but not the other way around.
FILES
/var/run/utmpx The utmpx file.
SEE ALSO
asl(3), endutxent(3), endutxent_wtmp(3), getlastlogx(3), utmp(5)
BSD
January 31, 2007 BSD