The system history log contains a record of each action that alters the state of the system and queue. The system history log can be generated by uucp, uucico, uux, or uuxqt programs and put into the uucp, uucico, uux, uuxqt subdirectories of the /var/spool/uucp/.Log directory.
The format of each entry is as follows:
user system jobID time procID seqnum mesg1 mesg2
The following is a sample entry that uucico writes to /var/spool/uucp/.Log/uucico/mach1:
uucp mach1 (2/12-8:18:42, 2427, 0) CONN FAILED (NO DEVICES AVAILABLE)