3 # Copyright (c) University of Cambridge, 1995 - 2015
4 # See the file NOTICE for conditions of use and distribution.
6 # This script takes the following command line arguments:
7 # -l dir Log file directory
8 # -k days Number of days to keep the log files
10 # Except when they appear in comments, the following placeholders in this
11 # source are replaced when it is turned into a runnable script:
13 # CONFIGURE_FILE_USE_NODE
14 # CONFIGURE_FILE_USE_EUID
29 # This is a shell script for cycling exim main and reject log files. Each time
30 # it is run, the files get "shuffled down" by one, the current one (e.g.
31 # mainlog) becoming mainlog.01, the previous mainlog.01 becoming mainlog.02,
32 # and so on, up to the limit configured here. When the number to keep is
33 # greater than 99 (not common, but some people do it), three digits are used
34 # (e.g. mainlog.001). The same shuffling happens to the reject logs. All
35 # renamed files with numbers greater than 1 are compressed.
37 # This script should be called regularly (e.g. daily) by a root crontab
40 # 1 0 * * * /opt/exim/bin/exicyclog
42 # The following lines are generated from Exim's configuration file when
43 # this source is built into a script, but you can subsequently edit them
44 # without rebuilding things, as long are you are careful not to overwrite
45 # the script in the next Exim rebuild/install. "Keep" is the number of old log
46 # files that are required to be kept. Its value can be overridden by the -k
47 # command line option. "Compress" and "suffix" define your chosen compression
48 # method. The others are provided because the location of certain commands
49 # varies from OS to OS. Sigh.
52 compress=COMPRESS_COMMAND
53 suffix=COMPRESS_SUFFIX
62 # End of editable lines
63 #########################################################################
65 # Sort out command line options.
67 while [ $# -gt 0 ] ; do
75 *) echo "** exicyclog: unknown option $1"
82 # Some operating systems have different versions in which the commands live
83 # in different places. We have a fudge that will search the usual suspects if
86 for cmd in chgrp chmod chown mv rm touch; do
88 if [ "$oldcmd" != "look_for_it" ] ; then continue ; fi
90 for dir in /bin /usr/bin /usr/sbin /usr/etc ; do
91 if [ -f $dir/$cmd ] ; then
99 # See if this installation is using the esoteric "USE_EUID" feature of Exim,
100 # in which it uses the effective user id as a suffix for the configuration file
101 # name. In order for this to work, exicyclog must be run under the appropriate
104 if [ "CONFIGURE_FILE_USE_EUID" = "yes" ]; then
108 # See if this installation is using the esoteric "USE_NODE" feature of Exim,
109 # in which it uses the host's name as a suffix for the configuration file name.
111 if [ "CONFIGURE_FILE_USE_NODE" = "yes" ]; then
112 hostsuffix=.`uname -n`
115 # Now find the configuration file name. This has got complicated because the
116 # CONFIGURE_FILE value may now be a list of files. The one that is used is the
117 # first one that exists. Mimic the code in readconf.c by testing first for the
118 # suffixed file in each case.
120 set `awk -F: '{ for (i = 1; i <= NF; i++) print $i }' <<End
124 while [ "$config" = "" -a $# -gt 0 ] ; do
125 if [ -f "$1$euid$hostsuffix" ] ; then
126 config="$1$euid$hostsuffix"
127 elif [ -f "$1$euid" ] ; then
129 elif [ -f "$1$hostsuffix" ] ; then
130 config="$1$hostsuffix"
131 elif [ -f "$1" ] ; then
137 # Determine if the log file path is set, and where the spool directory is.
138 # Search for an exim_path setting in the configure file; otherwise use the bin
139 # directory. Call that version of Exim to find the spool directory and log file
140 # path, unless log_file_path was set above by a command line option. BEWARE: a
141 # tab character is needed in the command below. It has had a nasty tendency to
142 # get lost in the past. Use a variable to hold a space and a tab to keep the
146 exim_path=`grep "^[$st]*exim_path" $config | sed "s/.*=[$st]*//"`
147 if test "$exim_path" = ""; then exim_path=BIN_DIRECTORY/exim; fi
149 spool_directory=`$exim_path -C $config -bP spool_directory | sed 's/.*=[ ]*//'`
151 if [ "$log_file_path" = "" ] ; then
152 log_file_path=`$exim_path -C $config -bP log_file_path | sed 's/.*=[ ]*//'`
155 # If log_file_path contains only "syslog" then no Exim log files are in use.
156 # We can't cycle anything. Complain and give up.
158 if [ "$log_file_path" = "syslog" ] ; then
159 echo "*** Exim is logging to syslog - no log files to cycle ***"
163 # Otherwise, remove ":syslog" or "syslog:" (some spaces allowed) and inspect
164 # what remains. The simplistic regex originally used failed when a filename
165 # contained "syslog", so we have to use three less general ones, because sed
166 # doesn't have much power in its regexs.
168 log_file_path=`echo "$log_file_path" | \
169 sed 's/^ *:\{0,1\} *syslog *:\{0,1\} *//;s/: *syslog *:/:/;s/: *syslog *$//'`
171 # If log_file_path is empty, try and get the compiled in default by using
172 # /dev/null as the configuration file.
174 if [ "$log_file_path" = "" ]; then
175 log_file_path=`$exim_path -C /dev/null -bP log_file_path | sed 's/.*=[ ]*//'`
176 log_file_path=`echo "$log_file_path" | \
177 sed 's/^ *:\{0,1\} *syslog *:\{0,1\} *//;s/: *syslog *:/:/;s/: *syslog *$//'`
180 # If log_file_path is still empty, the logs we are interested in are probably
181 # called "mainlog" and "rejectlog" in the directory called "log" in the spool
182 # directory. Otherwise we fish out the directory from the given path, and also
183 # the names of the logs.
185 if [ "$log_file_path" = "" ]; then
186 logdir=$spool_directory/log
191 logdir=`echo $log_file_path | sed 's?/[^/]*$??'`
192 logbase=`echo $log_file_path | sed 's?^.*/??'`
193 mainlog=`echo $logbase | sed 's/%s/main/'`
194 rejectlog=`echo $logbase | sed 's/%s/reject/'`
195 paniclog=`echo $logbase | sed 's/%s/panic/'`
198 # Get into the log directory to do the business.
202 # If there is no main log file, do nothing.
204 if [ ! -f $mainlog ]; then exit; fi
206 # Find out the owner and group of the main log file so that we can re-instate
207 # this on moved and compressed files, since some operating systems may change
208 # things. This is a tedious bit of code, but it should work both in operating
209 # systems where the -l option of ls gives the user and group, and those in which
210 # you need -lg. The condition is that, if the fifth field of the output from
211 # ls consists entirely of digits, then the third and fourth fields are the user
217 # These statements work fine in the Bourne or Korn shells, but not in Bash.
218 # So for the benefit of systems whose /bin/sh is really Bash, they have been
219 # changed to a messier form.
221 # user=`echo "$a\n$b\n" | awk 'BEGIN { OFS=""} { if ($5 ~ /^[0-9]+$/) print $3; }'`
222 # group=`echo "$a\n$b\n" | awk 'BEGIN { OFS=""} { if ($5 ~ /^[0-9]+$/) print $4; }'`
226 " | awk 'BEGIN { OFS=""} { if ($5 ~ /^[0-9]+$/) { print $3; exit; } }'`
230 " | awk 'BEGIN { OFS=""} { if ($5 ~ /^[0-9]+$/) { print $4; exit; } }'`
232 # Now do the job. First remove the files that have "fallen off the bottom".
233 # Look for both the compressed and uncompressed forms.
235 if [ $keep -lt 10 ]; then keept=0$keep; else keept=$keep; fi;
237 if [ -f $mainlog.$keept ]; then $rm $mainlog.$keept; fi;
238 if [ -f $mainlog.$keept.$suffix ]; then $rm $mainlog.$keept.$suffix; fi;
240 if [ -f $rejectlog.$keept ]; then $rm $rejectlog.$keept; fi;
241 if [ -f $rejectlog.$keept.$suffix ]; then $rm $rejectlog.$keept.$suffix; fi;
243 if [ -f $paniclog.$keept ]; then $rm $paniclog.$keept; fi;
244 if [ -f $paniclog.$keept.$suffix ]; then $rm $paniclog.$keept.$suffix; fi;
246 # Now rename all the previous old files by increasing their numbers by 1.
247 # When the number is less than 10, insert a leading zero.
250 if [ $count -lt 10 ]; then countt=0$count; else countt=$count; fi
252 while [ $count -gt 1 ]; do
253 old=`expr -- $count - 1`
254 if [ $keep -gt 99 ]; then
255 if [ $old -lt 10 ]; then oldt=00$old
256 elif [ $old -lt 100 ]; then oldt=0$old
260 if [ $old -lt 10 ]; then oldt=0$old; else oldt=$old; fi;
262 if [ -f $mainlog.$oldt ]; then
263 $mv $mainlog.$oldt $mainlog.$countt
264 elif [ -f $mainlog.$oldt.$suffix ]; then
265 $mv $mainlog.$oldt.$suffix $mainlog.$countt.$suffix
267 if [ -f $rejectlog.$oldt ]; then
268 $mv $rejectlog.$oldt $rejectlog.$countt
269 elif [ -f $rejectlog.$oldt.$suffix ]; then
270 $mv $rejectlog.$oldt.$suffix $rejectlog.$countt.$suffix
272 if [ -f $paniclog.$oldt ]; then
273 $mv $paniclog.$oldt $paniclog.$countt
274 elif [ -f $paniclog.$oldt.$suffix ]; then
275 $mv $paniclog.$oldt.$suffix $paniclog.$countt.$suffix
281 # Now rename the current files as 01 or 001 if keeping more than 99
283 if [ $keep -gt 99 ]; then first=001; else first=01; fi
285 # Grab our pid ro avoid race in file creation
288 if [ -f $mainlog ]; then
289 $mv $mainlog $mainlog.$first
290 $chown $user:$group $mainlog.$first
291 $touch $mainlog.$ourpid
292 $chown $user:$group $mainlog.$ourpid
293 $chmod 640 $mainlog.$ourpid
294 $mv $mainlog.$ourpid $mainlog
297 if [ -f $rejectlog ]; then
298 $mv $rejectlog $rejectlog.$first
299 $chown $user:$group $rejectlog.$first
300 $touch $rejectlog.$ourpid
301 $chown $user:$group $rejectlog.$ourpid
302 $chmod 640 $rejectlog.$ourpid
303 $mv $rejectlog.$ourpid $rejectlog
306 if [ -f $paniclog ]; then
307 $mv $paniclog $paniclog.$first
308 $chown $user:$group $paniclog.$first
309 $touch $paniclog.$ourpid
310 $chown $user:$group $paniclog.$ourpid
311 $chmod 640 $paniclog.$ourpid
312 $mv $paniclog.$ourpid $paniclog
315 # Now scan the (0)02 and later files, compressing where necessary, and
316 # ensuring that their owners and groups are correct.
320 while [ $count -le $keep ]; do
321 if [ $keep -gt 99 ]; then
322 if [ $count -lt 10 ]; then countt=00$count
323 elif [ $count -lt 100 ]; then countt=0$count
327 if [ $count -lt 10 ]; then countt=0$count; else countt=$count; fi
329 if [ -f $mainlog.$countt ]; then $compress $mainlog.$countt; fi
330 if [ -f $mainlog.$countt.$suffix ]; then
331 $chown $user:$group $mainlog.$countt.$suffix
333 if [ -f $rejectlog.$countt ]; then $compress $rejectlog.$countt; fi
334 if [ -f $rejectlog.$countt.$suffix ]; then
335 $chown $user:$group $rejectlog.$countt.$suffix
337 if [ -f $paniclog.$countt ]; then $compress $paniclog.$countt; fi
338 if [ -f $paniclog.$countt.$suffix ]; then
339 $chown $user:$group $paniclog.$countt.$suffix
342 count=`expr -- $count + 1`