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Sergey Ponomarev 641ec2b644 syslog-ng: alternative for logread
When the syslog-ng installed it records all messages to /var/log/messages.
This makes the default OpenWrt's ubox /sbin/logread useless and return nothing.

The logread script was added to the syslog-ng as a shim.
It's based on `tail /var/log/messages` and repeats basic options that the ubox logread have.
The script is installed instead of the /sbin/logread and this is causes an error.

Instead install it to /usr/libexec/logread.sh and specify as an alternative /sbin/logread.

The ubox logread also needs to be made as alternative in /usr/libexec/logread-ubox.

So we need to give it a separate name.
The most simple and clear would be logread-shell or just logread.sh.

Suggested-by: Andreas Gnau <andreas.gnau@iopsys.eu>
Signed-off-by: Sergey Ponomarev <stokito@gmail.com>
2024-11-24 11:10:10 +01:00

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#!/bin/sh
# Shell script compatibility wrapper for /sbin/logread
#
# Copyright (C) 2019 Dirk Brenken <dev@brenken.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
logfile="/var/log/messages"
if [ ! -f "${logfile}" ]
then
printf "%s\n" "Error: logfile not found!"
exit 2
fi
usage()
{
printf "%s\n" "Usage: logread [options]"
printf "%s\n" "Options:"
printf "%5s %-10s%s\n" "-l" "<count>" "Got only the last 'count' messages"
printf "%5s %-10s%s\n" "-e" "<pattern>" "Filter messages with a regexp"
printf "%5s %-10s%s\n" "-f" "" "Follow log messages"
printf "%5s %-10s%s\n" "-h" "" "Print this help message"
}
if [ -z "${1}" ]
then
cat "${logfile}"
exit 0
else
while [ "${1}" ]
do
case "${1}" in
-l)
shift
count="${1//[^0-9]/}"
tail -n "${count:-50}" "${logfile}"
exit 0
;;
-e)
shift
pattern="${1}"
grep -E "${pattern}" "${logfile}"
exit 0
;;
-f)
tail -f "${logfile}"
exit 0
;;
-fe)
shift
pattern="${1}"
tail -f "${logfile}" | grep -E "${pattern}"
exit 0
;;
-h|*)
usage
exit 1
;;
esac
shift
done
fi