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#!/bin/sh
# This is a shell script replacement for the sysklogd's logrotate cron script
# and syslogd-listfiles perl script.
# Copyright (C) 2008 N. Angelacos for the Alpine Linux project - GPL2
CONF="/etc/syslog.conf"
syslogd_listfiles() {
# List the target files from syslog.conf
local skip="auth"
[ "$1" = "--auth" ] && skip=" "
# the while loop joins lines that end in "\"
# the sed (in order)-
# strips comments;
# collapses spaces/tabs to 1 space;
# deletes the "-" in front of the filename;
# deletes whitespace before ';'
# deletes lines that have the "skip" facility
# deletes the facility (leaving just the filename)
# deletes lines that are not filenames with leading "/"
while read a ; do echo "$a"; done < $CONF |\
sed -n "/^[ \t]*#/D; /^[ \t]*$/D; s/[ \t]\+/ /g; \
s+ -/+ /+g; s/ *; */;/; /^.*\($skip\)[^ ]* /D; \
s/^[^ ]* //; /^[^\\/]/D; P" |\
sort | uniq
}
# dumb little savelog - no error checking here
savelog () {
local group="adm"
local mode="644"
local user="root"
local cycle=2
local logfile=""
# parse args
while getopts "g:u:m:c:" opt; do
case $opt in
g) group=$OPTARG ;;
u) user=$OPTARG ;;
m) mode=$OPTARG ;;
c) cycle=$OPTARG ;;
*) echo "unknown option: $opt" >&2 && return 1;;
esac
done
shift $(( $OPTIND - 1 ))
logfile=$1
# Cycle the logs
while [ $cycle -ne 0 ]; do
p=$cycle
cycle=$(( $cycle - 1 ))
a=$logfile.$cycle*
b=$( echo $a | sed "s/\.$cycle/\.$p/")
[ -f $a ] && mv $a $b
done
# compress .1 and let .0 be uncompressed
[ -f $logfile.1 ] && gzip $logfile.1
[ -f $logfile ] && mv $logfile $logfile.0
# set permissions
chown $user:$group $logfile.* 2>/dev/null
chmod $mode $logfile.* 2>/dev/null
}
# Main script
for LOG in $( syslogd_listfiles ); do
[ -f $LOG ] && savelog -g adm -m 640 -u root -c 7 $LOG
done
for LOG in $(syslogd_listfiles --auth); do
[ -f $LOG ] && savelog -g adm -m 640 -u root -c 7 $LOG
done
killall -HUP syslogd
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