| 1 | #! /bin/sh |
| 2 | # $Cambridge: exim/src/src/exinext.src,v 1.1 2004/10/07 10:39:01 ph10 Exp $ |
| 3 | |
| 4 | # Copyright (c) 1996-2004 University of Cambridge. |
| 5 | # See the file NOTICE for conditions of use and distribution. |
| 6 | |
| 7 | # Except when they appear in comments, the following placeholders in this |
| 8 | # source are replaced when it is turned into a runnable script: |
| 9 | # |
| 10 | # CONFIGURE_FILE_USE_NODE |
| 11 | # CONFIGURE_FILE |
| 12 | # BIN_DIRECTORY |
| 13 | |
| 14 | # PROCESSED_FLAG |
| 15 | |
| 16 | # A shell+perl script to fish out the next retry time for a given domain; |
| 17 | # it first calls exim to find out which hosts are set up for that domain and |
| 18 | # then fishes out the retry data for each one. |
| 19 | |
| 20 | # For testing the selection and formatting logic, and perhaps for use in |
| 21 | # special cases, the script can have an argument -C <filename> to specify |
| 22 | # the use of an alternate Exim configuration file. It may also have any number |
| 23 | # of -D options to set macros that are passed to exim. |
| 24 | |
| 25 | config= |
| 26 | eximmacdef= |
| 27 | exim_path= |
| 28 | |
| 29 | if expr $1 : '\-' >/dev/null ; then |
| 30 | while expr $1 : '\-' >/dev/null ; do |
| 31 | if [ "$1" = "-C" ]; then |
| 32 | config=$2 |
| 33 | shift |
| 34 | shift |
| 35 | elif expr $1 : '\-D' >/dev/null ; then |
| 36 | eximmacdef="$eximmacdef $1" |
| 37 | if expr $1 : '\-DEXIM_PATH=' >/dev/null ; then |
| 38 | exim_path=`expr $1 : '\-DEXIM_PATH=\(.*\)'` |
| 39 | fi |
| 40 | shift |
| 41 | else |
| 42 | break |
| 43 | fi |
| 44 | done |
| 45 | fi |
| 46 | |
| 47 | # We need to save the script's argument because in the absence of -C we need to |
| 48 | # use shell arguments for sorting out the configuration file name. |
| 49 | |
| 50 | argone=$1 |
| 51 | |
| 52 | # This is the normal case when no config file or macros are specified |
| 53 | |
| 54 | if [ "$config" = "" ]; then |
| 55 | # See if this installation is using the esoteric "USE_NODE" feature of Exim, |
| 56 | # in which it uses the host's name as a suffix for the configuration file name. |
| 57 | |
| 58 | if [ "CONFIGURE_FILE_USE_NODE" = "yes" ]; then |
| 59 | hostsuffix=.`uname -n` |
| 60 | fi |
| 61 | |
| 62 | # Now find the configuration file name. This has got complicated because |
| 63 | # CONFIGURE_FILE may now be a list of files. The one that is used is the first |
| 64 | # one that exists. Mimic the code in readconf.c by testing first for the |
| 65 | # suffixed file in each case. |
| 66 | |
| 67 | set `awk -F: '{ for (i = 1; i <= NF; i++) print $i }' <<End |
| 68 | CONFIGURE_FILE |
| 69 | End |
| 70 | ` |
| 71 | while [ "$config" = "" -a $# -gt 0 ] ; do |
| 72 | if [ -f "$1$hostsuffix" ] ; then |
| 73 | config="$1$hostsuffix" |
| 74 | elif [ -f "$1" ] ; then |
| 75 | config="$1" |
| 76 | fi |
| 77 | shift |
| 78 | done |
| 79 | fi |
| 80 | |
| 81 | # Determine where the spool directory is. Search for an exim_path setting |
| 82 | # in the configure file; otherwise use the bin directory. Call that version of |
| 83 | # Exim to find the spool directory and the qualify domain. BEWARE: a tab |
| 84 | # character is needed in the command below. It has had a nasty tendency to get |
| 85 | # lost in the past. Use a variable to hold a space and a tab to keep the tab in |
| 86 | # one place. |
| 87 | |
| 88 | st=' ' |
| 89 | |
| 90 | if [ "$exim_path" = "" ]; then |
| 91 | exim_path=`grep "^[$st]*exim_path" $config | sed "s/.*=[$st]*//"` |
| 92 | fi |
| 93 | |
| 94 | if test "$exim_path" = ""; then exim_path=BIN_DIRECTORY/exim; fi |
| 95 | spool_directory=`$exim_path $eximmacdef -C $config -bP spool_directory | sed 's/.*=[ ]*//'` |
| 96 | qualify_domain=`$exim_path $eximmacdef -C $config -bP qualify_domain | sed 's/.*=[ ]*//'` |
| 97 | |
| 98 | # Now do the job. Perl uses $ so frequently that we don't want to have to |
| 99 | # escape them all from the shell, so pass in shell variable values as |
| 100 | # arguments. |
| 101 | |
| 102 | # 16-May-1996 Fixed it to do better if routing fails to complete. |
| 103 | # Improved the format of the output. |
| 104 | # 10-Jun-1996 Complain if no argument given. |
| 105 | # 02-Aug-1996 Lower case the domain. |
| 106 | # 14-Jan-1999 Add subject to want list even if remote host found, so as to |
| 107 | # pick up routing delays after temporary recipient errors. |
| 108 | # Also add unqualified subject if it looks like a message id. |
| 109 | # 01-Apr-2004 Add the -C feature for testing |
| 110 | |
| 111 | if [ "$argone" = "" ]; then |
| 112 | echo "Usage: exinext <address>|<domain>|<local-part>" |
| 113 | exit 1 |
| 114 | fi |
| 115 | |
| 116 | perl - $exim_path "$eximmacdef" $argone $spool_directory $qualify_domain <<'End' |
| 117 | |
| 118 | # Name the arguments |
| 119 | |
| 120 | $exim = $ARGV[0]; |
| 121 | $eximmacdef = $ARGV[1]; |
| 122 | $subject = $ARGV[2]; |
| 123 | $spool = $ARGV[3]; |
| 124 | $qualify = $ARGV[4]; |
| 125 | |
| 126 | # If the subject doesn't contain an @ then construct an address |
| 127 | # for the domain, and ensure that in both cases the domain is |
| 128 | # lower cased. |
| 129 | |
| 130 | $address = ($subject =~ /^([^\@]*)\@([^\@]*)$/)? |
| 131 | "$1\@\L$2\E" : "User\@\L$subject\E"; |
| 132 | |
| 133 | # Run Exim to get a list of hosts for the given domain; for |
| 134 | # each one construct the appropriate retry key. |
| 135 | |
| 136 | open(LIST, "$exim -v -bt $address |") || |
| 137 | die "can't run exim to route $address"; |
| 138 | |
| 139 | while (<LIST>) |
| 140 | { |
| 141 | chop; |
| 142 | push(@list, $_) if s/\s*host (\S+)\s+\[(.+)\].*/$1:$2/; |
| 143 | print "$_\n" if /cannot be resolved/; |
| 144 | } |
| 145 | close(LIST); |
| 146 | |
| 147 | # If there were no hosts, assume that what was given was a local |
| 148 | # username, unless it contains an @, and construct a suitable retry |
| 149 | # key for that. Also, if it looks like a message id, search for that |
| 150 | # as well, so as to pick up message-specific retry data. |
| 151 | |
| 152 | if (scalar(@list) == 0) |
| 153 | { |
| 154 | push(@list, $subject) if $subject =~ /^\w{6}-\w{6}-\w{2}$/; |
| 155 | |
| 156 | if ($subject !~ /\@/ && $subject !~ /\./) |
| 157 | { |
| 158 | push(@list, "$subject\@$qualify"); |
| 159 | } |
| 160 | else |
| 161 | { |
| 162 | print "No remote hosts found for $subject\n"; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | # Always search for the full address, even if hosts are found, in case |
| 167 | # there is a routing delay caused by a temporary recipient error. |
| 168 | |
| 169 | push(@list, $subject); |
| 170 | |
| 171 | # Run exim_dumpdb to get out the retry data and pick off what we want |
| 172 | |
| 173 | open(DATA, "${exim}_dumpdb $spool retry |") || |
| 174 | die "can't run exim_dumpdb"; |
| 175 | |
| 176 | while (<DATA>) |
| 177 | { |
| 178 | for ($i = 0; $i <= $#list; $i++) |
| 179 | { |
| 180 | if (/$list[$i]/) |
| 181 | { |
| 182 | $printed = 1; |
| 183 | if (/^\s*T:[^:\s]*:/) |
| 184 | { |
| 185 | ($key,$error,$error2,$text) = /^\s*T:(\S+)\s+(\S+)\s+(\S+)\s*(.*)$/; |
| 186 | |
| 187 | # Parsing the keys is a nightmare because of IPv6. The design of the |
| 188 | # format for the keys is a complete shambles. All my fault (PH). But |
| 189 | # I don't want to change it just for this purpose. If they key |
| 190 | # contains more than 3 colons, we have an IPv6 address, because |
| 191 | # an IPv6 address must contain at least two colons. |
| 192 | |
| 193 | # Deal with IPv4 addresses (3 colons or fewer) |
| 194 | |
| 195 | if ($key !~ /:([^:]*?:){3}/) |
| 196 | { |
| 197 | ($host,$ip,$port,$msgid) = $key =~ |
| 198 | /^([^:]*):([^:]*)(?::([^:]*)(?::(\S*)|)|)/; |
| 199 | } |
| 200 | |
| 201 | # Deal with IPv6 addresses; sorting out the colons is a complete |
| 202 | # mess. We should be able to find the host name and IP address from |
| 203 | # further in the message. That seems the easiest escape plan here. We |
| 204 | # can use those to match the rest of the key. |
| 205 | |
| 206 | else |
| 207 | { |
| 208 | ($host,$ip) = $text =~ /host\s(\S+)\s\[([^]]+)\]/; |
| 209 | if (defined $host) |
| 210 | { |
| 211 | ($port,$msgid) = $key =~ |
| 212 | /^$host:$ip(?::([^:]*)(?::(\S*)|)|)/; |
| 213 | } |
| 214 | |
| 215 | # This will probably be wrong... |
| 216 | |
| 217 | else |
| 218 | { |
| 219 | ($host,$ip) = $key =~ /([^:]*):(.*)/; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | printf("Transport: %s [%s]", $host, $ip); |
| 224 | print ":$port" if defined $port; |
| 225 | print " $msgid" if defined $msgid; |
| 226 | print " error $error: $text\n"; |
| 227 | } |
| 228 | |
| 229 | else |
| 230 | { |
| 231 | ($type,$domain,$error,$error2,$text) = |
| 232 | /^\s*(\S):(\S+)\s+(\S+)\s+(\S+)\s*(.*)$/; |
| 233 | $type = ($type eq 'R')? "Route: " : |
| 234 | ($type eq 'T')? "Transport: " : ""; |
| 235 | print "$type$domain error $error: $text\n"; |
| 236 | } |
| 237 | $_ = <DATA>; |
| 238 | ($first,$last,$next,$expired) = |
| 239 | /^(\S+\s+\S+)\s+(\S+\s+\S+)\s+(\S+\s+\S+)\s*(\*?)/; |
| 240 | print " first failed: $first\n"; |
| 241 | print " last tried: $last\n"; |
| 242 | print " next try at: $next\n"; |
| 243 | print " past final cutoff time\n" if $expired eq "*"; |
| 244 | } |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | close(DATA); |
| 249 | print "No retry data found for $subject\n" if !$printed; |
| 250 | End |
| 251 | |