/usr/lib/swipl/library/ext/clib/syslog.pl
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 openlog(+Ident:atom, +Options:list(atom), +Facility:atom) is det
Open system log. This predicate provides a direct interface into the openlog() library call. If the library call is successful, it runs at_halt(closelog) to ensure closing the system log on clean exit.
Arguments:
Ident- prepended to every message, and is typically set to the program name.
Options- is a list of options. Values are corresponding C options, after removing =LOG_= and translation to lower case: cons, ndelay, nowait, odelay, perror, pid.
Facility- is one of auth, authpriv, cron, daemon, ftp, kern, local0 ... local7, lpr, mail, news, syslog, user or uucp.
ClioPatria (version V3.1.1-51-ga0b30a5)