1#! /bin/sh 2 3# Copyright (c) University of Cambridge, 1995 - 2007 4# See the file NOTICE for conditions of use and distribution. 5 6# Except when they appear in comments, the following placeholders in this 7# source are replaced when it is turned into a runnable script: 8# 9# CONFIGURE_FILE_USE_NODE 10# CONFIGURE_FILE 11# BIN_DIRECTORY 12 13# PROCESSED_FLAG 14 15# A shell+perl script to fish out the next retry time for a given domain; 16# it first calls exim to find out which hosts are set up for that domain and 17# then fishes out the retry data for each one. 18 19# For testing the selection and formatting logic, and perhaps for use in 20# special cases, the script can have an argument -C <filename> to specify 21# the use of an alternate Exim configuration file. It may also have any number 22# of -D options to set macros that are passed to exim. 23 24config= 25eximmacdef= 26exim_path= 27 28if test "x$1" = x--version 29then 30 echo "`basename $0`: $0" 31 echo "build: EXIM_RELEASE_VERSIONEXIM_VARIANT_VERSION" 32 exit 0 33fi 34 35if expr -- $1 : '\-' >/dev/null ; then 36 while expr -- $1 : '\-' >/dev/null ; do 37 if [ "$1" = "-C" ]; then 38 config=$2 39 shift 40 shift 41 elif expr -- $1 : '\-D' >/dev/null ; then 42 eximmacdef="$eximmacdef $1" 43 if expr -- $1 : '\-DEXIM_PATH=' >/dev/null ; then 44 exim_path=`expr -- $1 : '\-DEXIM_PATH=\(.*\)'` 45 fi 46 shift 47 else 48 break 49 fi 50 done 51fi 52 53# We need to save the script's argument because in the absence of -C we need to 54# use shell arguments for sorting out the configuration file name. 55 56argone=$1 57 58# This is the normal case when no config file or macros are specified 59 60if [ "$config" = "" ]; then 61 # See if this installation is using the esoteric "USE_NODE" feature of Exim, 62 # in which it uses the host's name as a suffix for the configuration file name. 63 64 if [ "CONFIGURE_FILE_USE_NODE" = "yes" ]; then 65 hostsuffix=.`uname -n` 66 fi 67 68 # Now find the configuration file name. This has got complicated because 69 # CONFIGURE_FILE may now be a list of files. The one that is used is the first 70 # one that exists. Mimic the code in readconf.c by testing first for the 71 # suffixed file in each case. 72 73 set `awk -F: '{ for (i = 1; i <= NF; i++) print $i }' <<End 74CONFIGURE_FILE 75End 76` 77 while [ "$config" = "" -a $# -gt 0 ] ; do 78 if [ -f "$1$hostsuffix" ] ; then 79 config="$1$hostsuffix" 80 elif [ -f "$1" ] ; then 81 config="$1" 82 fi 83 shift 84 done 85fi 86 87# Determine where the spool directory is. Search for an exim_path setting 88# in the configure file; otherwise use the bin directory. Call that version of 89# Exim to find the spool directory and the qualify domain. BEWARE: a tab 90# character is needed in the command below. It has had a nasty tendency to get 91# lost in the past. Use a variable to hold a space and a tab to keep the tab in 92# one place. 93 94st=' ' 95 96if [ "$exim_path" = "" ]; then 97 exim_path=`grep "^[$st]*exim_path" $config | sed "s/.*=[$st]*//"` 98fi 99 100if test "$exim_path" = ""; then exim_path=BIN_DIRECTORY/exim; fi 101spool_directory=`$exim_path $eximmacdef -C $config -bP spool_directory | sed 's/.*=[ ]*//'` 102qualify_domain=`$exim_path $eximmacdef -C $config -bP qualify_domain | sed 's/.*=[ ]*//'` 103 104# Now do the job. Perl uses $ so frequently that we don't want to have to 105# escape them all from the shell, so pass in shell variable values as 106# arguments. 107 108# 16-May-1996 Fixed it to do better if routing fails to complete. 109# Improved the format of the output. 110# 10-Jun-1996 Complain if no argument given. 111# 02-Aug-1996 Lower case the domain. 112# 14-Jan-1999 Add subject to want list even if remote host found, so as to 113# pick up routing delays after temporary recipient errors. 114# Also add unqualified subject if it looks like a message id. 115# 01-Apr-2004 Add the -C feature for testing 116# 22-Dec-2005 Complete the -C feature (!) 117 118if [ "$argone" = "" ]; then 119 echo "Usage: exinext <address>|<domain>|<local-part>" 120 exit 1 121fi 122 123perl - $exim_path "$eximmacdef" $argone $spool_directory $qualify_domain $config <<'End' 124 125 # We don't import anything, but guard against future changes which do 126 BEGIN { pop @INC if $INC[-1] eq '.' }; 127 128 # Name the arguments 129 130 $exim = $ARGV[0]; 131 $eximmacdef = $ARGV[1]; 132 $subject = $ARGV[2]; 133 $spool = $ARGV[3]; 134 $qualify = $ARGV[4]; 135 $config = $ARGV[5]; 136 137 # If the subject doesn't contain an @ then construct an address 138 # for the domain, and ensure that in both cases the domain is 139 # lower cased. 140 141 $address = ($subject =~ /^([^\@]*)\@([^\@]*)$/)? 142 "$1\@\L$2\E" : "User\@\L$subject\E"; 143 144 # Run Exim to get a list of hosts for the given domain; for 145 # each one construct the appropriate retry key. 146 147 open(LIST, "$exim -C $config -v -bt $address |") || 148 die "can't run exim to route $address"; 149 150 while (<LIST>) 151 { 152 chop; 153 push(@list, $_) if s/\s*host (\S+)\s+\[(.+)\].*/$1:$2/; 154 print "$_\n" if /cannot be resolved/; 155 } 156 close(LIST); 157 158 # If there were no hosts, assume that what was given was a local 159 # username, unless it contains an @, and construct a suitable retry 160 # key for that. Also, if it looks like a message id, search for that 161 # as well, so as to pick up message-specific retry data. 162 163 if (scalar(@list) == 0) 164 { 165 push(@list, $subject) if $subject =~ /^\w{6}-\w{6}-\w{2}$/; 166 167 if ($subject !~ /\@/ && $subject !~ /\./) 168 { 169 push(@list, "$subject\@$qualify"); 170 } 171 else 172 { 173 print "No remote hosts found for $subject\n"; 174 } 175 } 176 177 # Always search for the full address, even if hosts are found, in case 178 # there is a routing delay caused by a temporary recipient error. 179 180 push(@list, $subject); 181 182 # Run exim_dumpdb to get out the retry data and pick off what we want 183 184 open(DATA, "${exim}_dumpdb $spool retry |") || 185 die "can't run exim_dumpdb"; 186 187 while (<DATA>) 188 { 189 for ($i = 0; $i <= $#list; $i++) 190 { 191 if (/$list[$i]/) 192 { 193 $printed = 1; 194 if (/^\s*T:[^:\s]*:/) 195 { 196 ($key,$error,$error2,$text) = /^\s*T:(\S+)\s+(\S+)\s+(\S+)\s*(.*)$/; 197 198 # Parsing the keys is a nightmare because of IPv6. The design of the 199 # format for the keys is a complete shambles. All my fault (PH). But 200 # I don't want to change it just for this purpose. If they key 201 # contains more than 3 colons, we have an IPv6 address, because 202 # an IPv6 address must contain at least two colons. 203 204 # Deal with IPv4 addresses (3 colons or fewer) 205 206 if ($key !~ /:([^:]*?:){3}/) 207 { 208 ($host,$ip,$port,$msgid) = $key =~ 209 /^([^:]*):([^:]*)(?::([^:]*)(?::(\S*)|)|)/; 210 } 211 212 # Deal with IPv6 addresses; sorting out the colons is a complete 213 # mess. We should be able to find the host name and IP address from 214 # further in the message. That seems the easiest escape plan here. We 215 # can use those to match the rest of the key. 216 217 else 218 { 219 ($host,$ip) = $text =~ /host\s(\S+)\s\[([^]]+)\]/; 220 if (defined $host) 221 { 222 ($port,$msgid) = $key =~ 223 /^$host:$ip(?::([^:]*)(?::(\S*)|)|)/; 224 } 225 226 # This will probably be wrong... 227 228 else 229 { 230 ($host,$ip) = $key =~ /([^:]*):(.*)/; 231 } 232 } 233 234 printf("Transport: %s [%s]", $host, $ip); 235 print ":$port" if defined $port; 236 print " $msgid" if defined $msgid; 237 print " error $error: $text\n"; 238 } 239 240 else 241 { 242 ($type,$domain,$error,$error2,$text) = 243 /^\s*(\S):(\S+)\s+(\S+)\s+(\S+)\s*(.*)$/; 244 $type = ($type eq 'R')? "Route: " : 245 ($type eq 'T')? "Transport: " : ""; 246 print "$type$domain error $error: $text\n"; 247 } 248 $_ = <DATA>; 249 ($first,$last,$next,$expired) = 250 /^(\S+\s+\S+)\s+(\S+\s+\S+)\s+(\S+\s+\S+)\s*(\*?)/; 251 print " first failed: $first\n"; 252 print " last tried: $last\n"; 253 print " next try at: $next\n"; 254 print " past final cutoff time\n" if $expired eq "*"; 255 } 256 } 257 } 258 259 close(DATA); 260 print "No retry data found for $subject\n" if !$printed; 261End 262 263