diplodocus.org Git - nmh/blob - uip/mhmail

   1 #! /bin/sh
   2 #
   3 # mhmail -- simple mail program
   4 #
   5 # This code is Copyright (c) 2012, by the authors of nmh.  See the
   6 # COPYRIGHT file in the root directory of the nmh distribution for
   7 # complete copyright information.
   8 #
   9 # Emulation of compiled mhmail(1), with these differences:
  10 # * Instead of silently not sending an empty message, notifies user
  11 #   "mhmail: empty message not sent, use -body '' to force."
  12 # * The compiled mhmail dropped a trailing newline from the -body argument.
  13 # * Supports all post(8) (by default, without -profile) or send(1)
  14 #   (with -profile) options.
  15 # * Optionally (with -profile) obeys the users profile, including
  16 #   AliasFile and send entries.
  17 # * Adds -nosend option, which displays the draft but does not send it.
  18 # * Drops support for undocumented -queue option.
  19 #
  20 # To do:
  21 # * add -header-field name:body switch
  22 # * add -attach file ... switch
  23
  24 usage='Usage: mhmail [addrs ... [switches]]
  25   switches are:
  26   -b(ody) text
  27   -c(c) addrs ...
  28   -f(rom) addr
  29   -su(bject) text
  30   -r(esent)
  31   -pr(ofile)
  32   -se(nd)
  33   -nose(nd)
  34   -v(ersion)
  35   -h(elp)
  36   and all post(8)/send(1) switches'
  37
  38 bindir=`dirname $0`
  39 nmhbindir=`cd "${bindir}" && pwd`
  40
  41 if [ $# -eq 0 ]; then
  42   #### Emulate mhmail for reading mail.
  43   exec "${nmhbindir}"/inc
  44 else
  45   #### Go through all the switches so we can build the draft.
  46   tolist=
  47   body=
  48   bodyarg=0
  49   cclist=
  50   ccarg=0
  51   from=
  52   fromarg=0
  53   subject=
  54   subjectarg=0
  55   resent=0
  56   postsendargs=
  57   switcharg=0
  58   use_send=0
  59   sendsw=1
  60   for arg in "$@"; do
  61     case "${arg}" in
  62       -*) switcharg=0
  63     esac
  64
  65     case "${arg}" in
  66       #### Post and send won't accept -f -or -s because they'd be
  67       #### ambiguous, so no conflicts with them.  And they don't have
  68       #### -b, -c, or -r.  For the new switches that compiled mhmail
  69       #### didn't have:  let -p indicate mhmail -profile, not send
  70       #### -port.  -send masks the send(1) -send switch.
  71       -b|-bo|-bod|-body) bodyarg=1 ;;
  72       -c|-cc) ccarg=1 ;;
  73       -f|-fr|-fro|-from) fromarg=1 ;;
  74       -h|-he|-hel|-help) printf "%s\n" "${usage}"; exit ;;
  75       -nose|-nosen|-nosend) sendsw=0 ;;
  76       -p|-pr|-pro|-prof|-profi|-profil|-profile) use_send=1 ;;
  77       -resend) printf "mhmail: did you mean -resent instead of -resend?\n" 1>&2
  78          exit 1 ;;
  79       -r|-re|-res|-rese|-resen|-resent) resent=1 ;;
  80       -se|-sen|-send) sendsw=1 ;;
  81       -su|-sub|-subj|-subje|-subjec|-subject) subjectarg=1 ;;
  82       -v|-ve|-ver|-vers|-versi|-versio|-version)
  83          #### Cheat instead of using autoconf and make to fill in the version.
  84          "${nmhbindir}"/mhpath -v | sed 's/mhpath/mhmail/'; exit ;;
  85       -*) postsendargs="${postsendargs:+${postsendargs} }${arg}"; switcharg=1 ;;
  86       *) if [ ${bodyarg} -eq 1 ]; then
  87            body="${arg}
  88 "; bodyarg=0
  89            #### Allow -body "" by using just a newline for the body.
  90            [ "${body}"x = x ]  &&  body='
  91 '
  92          elif [ ${fromarg} -eq 1 ]; then
  93            from="${arg}"; fromarg=0
  94          elif [ ${subjectarg} -eq 1 ]; then
  95            subject="${arg}"; subjectarg=0
  96          elif [ ${switcharg} -eq 1 ]; then
  97            postsendargs="${postsendargs:+${postsendargs} }${arg}"
  98          elif [ ${ccarg} -eq 1 ]; then
  99            #### Never reset ccarg to 0, for compatibilty with compiled mhmail.
 100            cclist="${cclist:+${cclist}, }${arg}"
 101          else
 102            #### An address.
 103            tolist="${tolist:+${tolist}, }${arg}"
 104          fi
 105     esac
 106   done
 107
 108   #### Check for at least one address and -from.
 109   if [ "${tolist}"x = x ]; then
 110     printf "mhmail: usage: mhmail addrs ... [switches]\n"
 111     exit 1
 112   fi
 113   if [ "${from}"x = x ]; then
 114     nmhlibdir=`${nmhbindir}/mhparam libdir`/
 115     from=`${nmhlibdir}ap -format '%(localmbox)' 0`
 116   fi
 117
 118   #### Build header.
 119   [ ${resent} -eq 0 ]  &&  prefix=  ||  prefix='Resent-'
 120   header="${prefix}To: ${tolist}
 121 "
 122   [ "${cclist}"x = x ]  ||  header="${header}${prefix}Cc: ${cclist}
 123 "
 124   [ "${subject}"x = x ]  ||  header="${header}${prefix}Subject: ${subject}
 125 ";
 126   [ "${from}"x = x ]  ||  header="${header}${prefix}From: ${from}
 127 ";
 128
 129   #### Set up a file to supply as a draft to send/post.  And set a
 130   #### trap to remove it.  send moves the file to a backup, so it will
 131   #### remove that, too.
 132   umask 077
 133   tmpdir="${MHTMPDIR:-${TMPDIR:-${TMP:-`${nmhbindir}/mhpath +`}}}"
 134   tmpfile="${tmpdir}/mhmail$$"
 135   tmpfilebackup="${tmpdir}/[,#]mhmail$$"
 136   tmpfileresent=
 137
 138   message_file=
 139   if [ ${resent} -eq 0 ]; then
 140     #### Add blank line after header if not resending.
 141     header="${header}
 142 "
 143     message_file="${tmpfile}"
 144   else
 145     if [ ${use_send} -eq 0 ]; then
 146       postsendargs="${postsendargs:+${postsendargs} }-dist"
 147       message_file="${tmpfile}"
 148     else
 149       #### When resending with send, tmpfile will just contain the
 150       #### Resent- header fields.  "${tmpfileresent}" will contain
 151       #### the message that is being resent.
 152       tmpfileresent="${tmpdir}/mhmail-resent$$"
 153       mhdist=1; export mhdist
 154       mhaltmsg=${tmpfileresent}; export mhaltmsg
 155       message_file="${tmpfileresent}"
 156       printf "" >"${message_file}"  || exit 2
 157     fi
 158   fi
 159
 160   trap 'rm -f '"${tmpfile}"' '"${tmpfilebackup}"' '"${tmpfileresent}" EXIT
 161
 162   if [ "${body}"x = x ]; then
 163     #### First put message header in the file.
 164     printf "%s" "${header}" >"${tmpfile}" || exit 2
 165
 166     tmpfile_size_before=`wc -c "${message_file}"`
 167     #### Now grab the body from stdin.  cat >> handles blank lines
 168     #### better than body=`cat`.
 169     cat >>"${message_file}" || exit 2
 170     tmpfile_size_after=`wc -c "${message_file}"`
 171
 172     #### Don't allow an empty body (from stdin).  Use string
 173     #### comparison so we don't have to strip the filename, etc.
 174     if [ "${tmpfile_size_before}" = "${tmpfile_size_after}" ]; then
 175       printf "mhmail: empty message not sent, use -body '' to force.\n" 1>&2
 176       exit 1
 177     fi
 178
 179     #### Add trailing newline to body if it doesn't have one.
 180     if [ `tail -n 1 "${message_file}" | wc -l` -ne 1 ]; then
 181       printf "\n" >>"${message_file}" || exit 2
 182     fi
 183   else
 184     #### Add trailing newline to body if it doesn't have one.
 185     [ `printf "${body}" | tail -n 1 | wc -l` -ne 1 ]  &&  body="${body}
 186 "
 187
 188     if [ "${tmpfileresent}" ]; then
 189       #### Put just the new message header in the file.
 190       printf "%s" "${header}" >"${tmpfile}" || exit 2
 191       #### and the body in the file to resend.
 192       printf "${body}" >"${tmpfileresent}" || exit 2
 193     else
 194       #### Put message header and body in the file.
 195       printf "%s" "${header}${body}" >"${tmpfile}" || exit 2
 196     fi
 197   fi
 198
 199   if [ ${sendsw} -eq 0 ]; then
 200     cat "${tmpfile}"
 201   else
 202     if [ ${use_send} -eq 0 ]; then
 203       post_or_send=`${nmhbindir}/mhparam postproc`
 204     else
 205       post_or_send="${nmhbindir}/send"
 206     fi
 207
 208     if "${post_or_send}" "${tmpfile}" ${postsendargs}; then
 209       exit
 210     else
 211       printf "Letter saved in dead.letter\n"
 212       #### exec skips the trap set above.
 213       exec mv "${tmpfile}" dead.letter
 214     fi
 215   fi
 216 fi