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#! /bin/sh # Copyright (c) University of Cambridge, 1995 - 2007 # See the file NOTICE for conditions of use and distribution. # Except when they appear in comments, the following placeholders in this # source are replaced when it is turned into a runnable script: # # CONFIGURE_FILE_USE_NODE # CONFIGURE_FILE # BIN_DIRECTORY # This file has been so processed. # A shell+perl script to fish out the next retry time for a given domain; # it first calls exim to find out which hosts are set up for that domain and # then fishes out the retry data for each one. # For testing the selection and formatting logic, and perhaps for use in # special cases, the script can have an argument -C <filename> to specify # the use of an alternate Exim configuration file. It may also have any number # of -D options to set macros that are passed to exim. config= eximmacdef= exim_path= if test "x$1" = x--version then echo "`basename $0`: $0" echo "build: 4.96.2" exit 0 fi if expr -- $1 : '\-' >/dev/null ; then while expr -- $1 : '\-' >/dev/null ; do if [ "$1" = "-C" ]; then config=$2 shift shift elif expr -- $1 : '\-D' >/dev/null ; then eximmacdef="$eximmacdef $1" if expr -- $1 : '\-DEXIM_PATH=' >/dev/null ; then exim_path=`expr -- $1 : '\-DEXIM_PATH=\(.*\)'` fi shift else break fi done fi # We need to save the script's argument because in the absence of -C we need to # use shell arguments for sorting out the configuration file name. argone=$1 # This is the normal case when no config file or macros are specified if [ "$config" = "" ]; then # See if this installation is using the esoteric "USE_NODE" feature of Exim, # in which it uses the host's name as a suffix for the configuration file name. if [ "" = "yes" ]; then hostsuffix=.`uname -n` fi # Now find the configuration file name. This has got complicated because # /etc/exim.conf may now be a list of files. The one that is used is the first # one that exists. Mimic the code in readconf.c by testing first for the # suffixed file in each case. set `awk -F: '{ for (i = 1; i <= NF; i++) print $i }' <<End /etc/exim.conf End ` while [ "$config" = "" -a $# -gt 0 ] ; do if [ -f "$1$hostsuffix" ] ; then config="$1$hostsuffix" elif [ -f "$1" ] ; then config="$1" fi shift done fi # Determine where the spool directory is. Search for an exim_path setting # in the configure file; otherwise use the bin directory. Call that version of # Exim to find the spool directory and the qualify domain. BEWARE: a tab # character is needed in the command below. It has had a nasty tendency to get # lost in the past. Use a variable to hold a space and a tab to keep the tab in # one place. st=' ' if [ "$exim_path" = "" ]; then exim_path=`grep "^[$st]*exim_path" $config | sed "s/.*=[$st]*//"` fi if test "$exim_path" = ""; then exim_path=/usr/sbin/exim; fi spool_directory=`$exim_path $eximmacdef -C $config -bP spool_directory | sed 's/.*=[ ]*//'` qualify_domain=`$exim_path $eximmacdef -C $config -bP qualify_domain | sed 's/.*=[ ]*//'` # Now do the job. Perl uses $ so frequently that we don't want to have to # escape them all from the shell, so pass in shell variable values as # arguments. # 16-May-1996 Fixed it to do better if routing fails to complete. # Improved the format of the output. # 10-Jun-1996 Complain if no argument given. # 02-Aug-1996 Lower case the domain. # 14-Jan-1999 Add subject to want list even if remote host found, so as to # pick up routing delays after temporary recipient errors. # Also add unqualified subject if it looks like a message id. # 01-Apr-2004 Add the -C feature for testing # 22-Dec-2005 Complete the -C feature (!) if [ "$argone" = "" ]; then echo "Usage: exinext <address>|<domain>|<local-part>" exit 1 fi perl - $exim_path "$eximmacdef" $argone $spool_directory $qualify_domain $config <<'End' # We don't import anything, but guard against future changes which do BEGIN { pop @INC if $INC[-1] eq '.' }; # Name the arguments $exim = $ARGV[0]; $eximmacdef = $ARGV[1]; $subject = $ARGV[2]; $spool = $ARGV[3]; $qualify = $ARGV[4]; $config = $ARGV[5]; # If the subject doesn't contain an @ then construct an address # for the domain, and ensure that in both cases the domain is # lower cased. $address = ($subject =~ /^([^\@]*)\@([^\@]*)$/)? "$1\@\L$2\E" : "User\@\L$subject\E"; # Run Exim to get a list of hosts for the given domain; for # each one construct the appropriate retry key. open(LIST, "$exim -C $config -v -bt $address |") || die "can't run exim to route $address"; while (<LIST>) { chop; push(@list, $_) if s/\s*host (\S+)\s+\[(.+)\].*/$1:$2/; print "$_\n" if /cannot be resolved/; } close(LIST); # If there were no hosts, assume that what was given was a local # username, unless it contains an @, and construct a suitable retry # key for that. Also, if it looks like a message id, search for that # as well, so as to pick up message-specific retry data. if (scalar(@list) == 0) { push(@list, $subject) if $subject =~ /^\w{6}-\w{6}-\w{2}$/; if ($subject !~ /\@/ && $subject !~ /\./) { push(@list, "$subject\@$qualify"); } else { print "No remote hosts found for $subject\n"; } } # Always search for the full address, even if hosts are found, in case # there is a routing delay caused by a temporary recipient error. push(@list, $subject); # Run exim_dumpdb to get out the retry data and pick off what we want open(DATA, "${exim}_dumpdb $spool retry |") || die "can't run exim_dumpdb"; while (<DATA>) { for ($i = 0; $i <= $#list; $i++) { if (/$list[$i]/) { $printed = 1; if (/^\s*T:[^:\s]*:/) { ($key,$error,$error2,$text) = /^\s*T:(\S+)\s+(\S+)\s+(\S+)\s*(.*)$/; # Parsing the keys is a nightmare because of IPv6. The design of the # format for the keys is a complete shambles. All my fault (PH). But # I don't want to change it just for this purpose. If they key # contains more than 3 colons, we have an IPv6 address, because # an IPv6 address must contain at least two colons. # Deal with IPv4 addresses (3 colons or fewer) if ($key !~ /:([^:]*?:){3}/) { ($host,$ip,$port,$msgid) = $key =~ /^([^:]*):([^:]*)(?::([^:]*)(?::(\S*)|)|)/; } # Deal with IPv6 addresses; sorting out the colons is a complete # mess. We should be able to find the host name and IP address from # further in the message. That seems the easiest escape plan here. We # can use those to match the rest of the key. else { ($host,$ip) = $text =~ /host\s(\S+)\s\[([^]]+)\]/; if (defined $host) { ($port,$msgid) = $key =~ /^$host:$ip(?::([^:]*)(?::(\S*)|)|)/; } # This will probably be wrong... else { ($host,$ip) = $key =~ /([^:]*):(.*)/; } } printf("Transport: %s [%s]", $host, $ip); print ":$port" if defined $port; print " $msgid" if defined $msgid; print " error $error: $text\n"; } else { ($type,$domain,$error,$error2,$text) = /^\s*(\S):(\S+)\s+(\S+)\s+(\S+)\s*(.*)$/; $type = ($type eq 'R')? "Route: " : ($type eq 'T')? "Transport: " : ""; print "$type$domain error $error: $text\n"; } $_ = <DATA>; ($first,$last,$next,$expired) = /^(\S+\s+\S+)\s+(\S+\s+\S+)\s+(\S+\s+\S+)\s*(\*?)/; print " first failed: $first\n"; print " last tried: $last\n"; print " next try at: $next\n"; print " past final cutoff time\n" if $expired eq "*"; } } } close(DATA); print "No retry data found for $subject\n" if !$printed; End
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