# syslogd -?
syslogd: invalid option -- ?
BusyBox v1.25.1 (2017-05-15 07:08:17 MST) multi-call binary.
Usage: syslogd [OPTIONS]
System logging utility
(this version of syslogd ignores /etc/syslog.conf)
-n Run in foreground
-R HOST[:PORT] Log to HOST:PORT (default PORT:514)
-L Log locally and via network (default is network only if -R)
-O FILE Log to FILE (default: /var/log/messages, stdout if -)
-s SIZE Max size (KB) before rotation (default:200KB, 0=off)
-b N N rotated logs to keep (default:1, max=99, 0=purge)
-l N Log only messages more urgent than prio N (1-8)
-S Smaller output
# syslogd -l 9
syslogd: number 9 is not in 1..8 range