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 # * fix -resent with -profile
  22 # * add -header-field name:body switch
  23 # * add -attach file ... switch
  24
  25 usage='Usage: mhmail [addrs ... [switches]]
  26   switches are:
  27   -b(ody) text
  28   -c(c) addrs ...
  29   -f(rom) addr
  30   -su(bject) text
  31   -r(esent)
  32   -pr(ofile)
  33   -se(nd)
  34   -nose(nd)
  35   -v(ersion)
  36   -h(elp)
  37   and all post(8)/send(1) switches'
  38
  39 bindir=`dirname $0`
  40 nmhbindir=`cd "${bindir}" && pwd`
  41
  42 if [ $# -eq 0 ]; then
  43   #### Emulate mhmail for reading mail.
  44   exec "${nmhbindir}"/inc
  45 else
  46   #### Go through all the switches so we can build the draft.
  47   tolist=
  48   body=
  49   bodyarg=0
  50   cclist=
  51   ccarg=0
  52   from=
  53   fromarg=0
  54   subject=
  55   subjectarg=0
  56   resent=0
  57   postsendargs=
  58   switcharg=0
  59   use_send=0
  60   sendsw=1
  61   for arg in "$@"; do
  62     case "${arg}" in
  63       -*) switcharg=0
  64     esac
  65
  66     case "${arg}" in
  67       #### Post and send won't accept -f -or -s because they'd be
  68       #### ambiguous, so no conflicts with them.  And they don't have
  69       #### -b, -c, or -r.  For the new switches that compiled mhmail
  70       #### didn't have:  let -p indicate mhmail -profile, not send
  71       #### -port.  -send masks the send(1) -send switch.
  72       -b|-bo|-bod|-body) bodyarg=1 ;;
  73       -c|-cc) ccarg=1 ;;
  74       -f|-fr|-fro|-from) fromarg=1 ;;
  75       -h|-he|-hel|-help) printf "%s\n" "${usage}"; exit ;;
  76       -nose|-nosen|-nosend) sendsw=0 ;;
  77       -p|-pr|-pro|-prof|-profi|-profil|-profile) use_send=1 ;;
  78       -resend) printf "mhmail: did you mean -resent instead of -resend?\n" 1>&2
  79          exit 1 ;;
  80       -r|-re|-res|-rese|-resen|-resent) resent=1 ;;
  81       -se|-sen|-send) sendsw=1 ;;
  82       -su|-sub|-subj|-subje|-subjec|-subject) subjectarg=1 ;;
  83       -v|-ve|-ver|-vers|-versi|-versio|-version)
  84          #### Cheat instead of using autoconf and make to fill in the version.
  85          "${nmhbindir}"/mhpath -v | sed 's/mhpath/mhmail/'; exit ;;
  86       -*) postsendargs="${postsendargs:+${postsendargs} }${arg}"; switcharg=1 ;;
  87       *) if [ ${bodyarg} -eq 1 ]; then
  88            body="${arg}
  89 "; bodyarg=0
  90            #### Allow -body "" by using just a newline for the body.
  91            [ "${body}"x = x ]  &&  body='
  92 '
  93          elif [ ${fromarg} -eq 1 ]; then
  94            from="${arg}"; fromarg=0
  95          elif [ ${subjectarg} -eq 1 ]; then
  96            subject="${arg}"; subjectarg=0
  97          elif [ ${switcharg} -eq 1 ]; then
  98            postsendargs="${postsendargs:+${postsendargs} }${arg}"
  99          elif [ ${ccarg} -eq 1 ]; then
 100            #### Never reset ccarg to 0, for compatibilty with compiled mhmail.
 101            cclist="${cclist:+${cclist}, }${arg}"
 102          else
 103            #### An address.
 104            tolist="${tolist:+${tolist}, }${arg}"
 105          fi
 106     esac
 107   done
 108
 109   #### Check for at least one address and -from.
 110   if [ "${tolist}"x = x ]; then
 111     printf "mhmail: usage: mhmail addrs ... [switches]\n"
 112     exit 1
 113   fi
 114   if [ "${from}"x = x ]; then
 115     nmhlibdir=`${nmhbindir}/mhparam libdir`/
 116     from=`${nmhlibdir}ap -format '%(localmbox)' 0`
 117   fi
 118
 119   #### Build header.
 120   [ ${resent} -eq 0 ]  &&  prefix=  ||  prefix='Resent-'
 121   header="${prefix}To: ${tolist}
 122 "
 123   [ "${cclist}"x = x ]  ||  header="${header}${prefix}Cc: ${cclist}
 124 "
 125   [ "${subject}"x = x ]  ||  header="${header}${prefix}Subject: ${subject}
 126 ";
 127   [ "${from}"x = x ]  ||  header="${header}${prefix}From: ${from}
 128 ";
 129
 130   #### Set up a file to supply as a draft to send/post.  And set a
 131   #### trap to remove it.  send moves the file to a backup, so it will
 132   #### remove that, too.
 133   umask 077
 134   tmpdir="${MHTMPDIR:-${TMPDIR:-${TMP:-`${nmhbindir}/mhpath +`}}}"
 135   tmpfil="${tmpdir}/mhmail$$"
 136   tmpfilbackup="${tmpdir}/[,#]mhmail$$"
 137   trap 'rm -f '"${tmpfil}"' '"${tmpfilbackup}" EXIT
 138
 139   if [ ${resent} -eq 0 ]; then
 140     #### Add blank line after header if not resending.
 141     header="${header}
 142 "
 143   else
 144     if [ ${use_send} -eq 0 ]; then
 145       postsendargs="${postsendargs:+${postsendargs} }-dist"
 146     else
 147       mhdist=1; export mhdist
 148       mhaltmsg=${tmpfil}; export mhaltmsg
 149       #### This doesn't work, I'm not sure about mhaltmsg.
 150       printf "mhmail: -resent not currently supported with -profile\n"
 151       exit 1
 152     fi
 153   fi
 154
 155   if [ "${body}"x = x ]; then
 156     #### First put message header in the file.  cat >> handles blank
 157     #### lines better than body=`cat`.
 158     printf "%s" "${header}" > "${tmpfil}" || exit 1
 159
 160     tmpfile_size_before=`wc -c "${tmpfil}"`
 161     #### Now grab the body from stdin.
 162     cat >>"${tmpfil}"
 163     tmpfile_size_after=`wc -c "${tmpfil}"`
 164
 165     #### Don't allow an empty body (from stdin).  Use string
 166     #### comparison so we don't have to strip the filename, etc.
 167     if [ "${tmpfile_size_before}" = "${tmpfile_size_after}" ]; then
 168       printf "mhmail: empty message not sent, use -body '' to force.\n" 1>&2
 169       exit 1
 170     fi
 171
 172     #### Add trailing newline to body if it doesn't have one.
 173     [ `printf "${body}" | tail -n 1 | wc -l` -ne 1 ]  &&  body="${body}
 174 "
 175   else
 176     #### Put message header and body in the file.
 177     printf "%s" "${header}${body}" > "${tmpfil}" || exit 1
 178   fi
 179
 180   if [ ${sendsw} -eq 0 ]; then
 181     cat "${tmpfil}"
 182   else
 183     if [ ${use_send} -eq 0 ]; then
 184       post_or_send=`${nmhbindir}/mhparam postproc`
 185     else
 186       post_or_send="${nmhbindir}/send"
 187     fi
 188
 189     if "${post_or_send}" "${tmpfil}" ${postsendargs}; then
 190       exit
 191     else
 192       printf "Letter saved in dead.letter\n"
 193       #### exec skips the trap set above.
 194       exec mv "${tmpfil}" dead.letter
 195     fi
 196   fi
 197 fi