dbounce-simple-safecat

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2009, 2010  Peter Pentchev
   4 # All rights reserved.
   5 #
   6 # Redistribution and use in source and binary forms, with or without
   7 # modification, are permitted provided that the following conditions
   8 # are met:
   9 # 1. Redistributions of source code must retain the above copyright
  10 #    notice, this list of conditions and the following disclaimer.
  11 # 2. Redistributions in binary form must reproduce the above copyright
  12 #    notice, this list of conditions and the following disclaimer in the
  13 #    documentation and/or other materials provided with the distribution.
  14 #
  15 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25 # SUCH DAMAGE.
  26
  27 set -e
  28
  29 usage()
  30 {
  31         cat <<EOUSAGE
  32 Usage:  dbounce-simple-safecat [-a addr] [-d dir] [-i queueid] [-t type] -f msg
  33         -a      the recipient of the bounced message
  34         -d      the bounce directory, default $DEFBOUNCEDIR
  35         -f      the full path to the bounced message to process
  36         -i      the ID of the bounce message in the local MTA's queue
  37         -t      the MTA type, currently ignored
  38 EOUSAGE
  39 }
  40
  41 DEFBOUNCEDIR='/var/spool/mail/dma-bounces'
  42 BOUNCEDIR="$DEFBOUNCEDIR"
  43
  44 while getopts 'a:d:f:i:t:' o; do
  45         case "$o" in
  46                 a)
  47                         ADDR="$OPTARG"
  48                         ;;
  49                 d)
  50                         BOUNCEDIR="$OPTARG"
  51                         ;;
  52                 f)
  53                         FILENAME="$OPTARG"
  54                         ;;
  55                 i)
  56                         QUEUEID="$OPTARG"
  57                         ;;
  58                 t)
  59                         MTA="$OPTARG"
  60                         ;;
  61                 *)
  62                         usage 1>&2
  63                         exit 1
  64         esac
  65 done
  66
  67 if [ ! -r "$FILENAME" ]; then
  68         echo "Nonexistent or unreadable bounce file $FILENAME" 1>&2
  69         exit 1
  70 fi
  71
  72 bname=`basename "$FILENAME"`
  73 dname=`dirname "$FILENAME"`
  74 if expr "$bname" : 'Q' > /dev/null; then
  75         qname="M${bname#Q}"
  76         qfile="$dname/$qname"
  77         if [ ! -r "$qfile" ]; then
  78                 echo "Nonexistent or unreadable bounce queue file $qfile" 1>&2
  79                 exit 1
  80         fi
  81 else
  82         qfile=''
  83 fi
  84
  85 F=`cat "$FILENAME" ${qfile:+"$qfile"} | safecat "$BOUNCEDIR/tmp" "$BOUNCEDIR/new"`
  86 OUTFILE="$BOUNCEDIR/new/$F"
  87 if [ ! -f "$OUTFILE" ]; then
  88         echo "safecat indicated success, but '$OUTFILE' does not exist" 1>&2
  89         exit 1
  90 fi
  91 echo "Successfully written the message to $OUTFILE"