#!/bin/sh
# logread: OpenWrt's log reader (ubox's logd), over Guix's syslog file.
# Supports -e PATTERN (extended regexp), -l COUNT (last lines), -f (follow);
# other ubox options are accepted and ignored.
LOG=/var/log/messages
pattern= lines= follow=
while getopts "e:l:fFs:p:r:u:t:h:z:Z0q" opt; do
	case "$opt" in
	e) pattern="$OPTARG" ;;
	l) lines="$OPTARG" ;;
	f) follow=1 ;;
	esac
done
if [ -n "$follow" ]; then
	set -- tail -n "${lines:-10}" -F "$LOG"
elif [ -n "$lines" ]; then
	set -- tail -n "$lines" "$LOG"
else
	set -- cat "$LOG"
fi
if [ -n "$pattern" ]; then
	"$@" | grep -E -- "$pattern"
else
	"$@"
fi