Hello, I have written a script to rotate the event-log, preserving the previous period's log entries. Therefore, the statistics are never empty after log rotation.
It can also be used to rotate the edit-log every 3 months. FYI, I have stressed it. It can "lose" 1 log line if you have more that 20 hits per seconds. (ie. about 70000 hits per hour !) Comments are welcome. [I know, it's NTRWTSTP: Not the right way to solve the problem. But I want a solution for moin 1.7, not a patch for 1.9] Franklin #!/bin/sh # # rotate-and-keep.sh - Rotate a log file, keeping the last period. # This script is useful when you want to rotate a file # periodically, but you want the "current" log file to always # contain two periods. (sometime needed for statistics) # Copyright 2009 Franklin Piat <URL:http://www.klabs.be/~fpiat/> # # 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, see <http://www.gnu.org/licenses/>. version=0.1 # LIMITATION # # Unique lines only # Use this script on logfiles that don't produce duplicate line # (i.e Each line MUST contain date and time, at least) # # Disk Space # The partition must have free space to make a copy of the last logfile # # ,--[ KNOWN BUG / DISCLAIMER ]------------------------------------------. # | | # | The traditional way to rotate a log file is to move it. Which is | # | guaranteed to be atomic and immediate. | # | | # | ** THIS SCRIPT ISN'T ATOMIC AND ISN'T IMMEDIATE ** | # | You may lose some new lines, appended while the rotation occurs. | # | (because it has to copy and manipulate the log file. Typically if | # | you have more than 10 lines of log per seconds... that is > 100000 | # | page hit per day!) | # `----------------------------------------------------------------------' LOGFILE=event-log ARCHIVE=event-log.$(date +%F_%T) TMPFILE=event-log.tmp LASTLINE=lastline set -e pivotline=0 if [ -s "$LASTLINE" -a -s "$LOGFILE" ]; then pivotline=$(grep -s -n -F -f $LASTLINE $LOGFILE | tail -n 1 | cut -d ":" -f 1) #DEBUG: printf "Rotate line #$pivotline: " >&2 ; cat "$LASTLINE" > &2 fi if [ "$pivotline" -gt 1 ] ; then pivotline=$(( $pivotline + 1 )) mv "$LOGFILE" "$TMPFILE" if sed -n $pivotline,\$p "$TMPFILE" > "$ARCHIVE" ; then cp "$ARCHIVE" "$TMPFILE" ## TEST: for test purpose, you can insert a sleep here to ## simulate the copy of large log file. #sleep 1 # Try to catch new lines (that occured during the "cp" above) if [ -s "$LOGFILE" ]; then cat "$LOGFILE" 2>/dev/null | tee -a "$ARCHIVE" >> "$TMPFILE" fi mv "$TMPFILE" "$LOGFILE" tail -n 1 "$ARCHIVE" > "$LASTLINE" else #Restore the logfile in case of error (especially disk-space!) echo "LOG ROTATION ABORTED: probably insufficient disk-space." >&2 mv "$TMPFILE" "$LOGFILE" exit 1 fi else if [ -s "$LOGFILE" ]; then cp "$LOGFILE" "$ARCHIVE" tail -n 1 "$ARCHIVE" > "$LASTLINE" else cp /dev/null "$LASTLINE" fi fi # # To test/stress this script you can generate a fake log using # while true; do date +%s.%N | tee -a event-log >> log; sleep 0.01 ; done ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Moin-user mailing list Moin-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/moin-user
