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 # * Adds -send/-nosend, -headerfield, and -attach options.
  11 # * Supports all post(8) (by default, without -profile) or send(1)
  12 #   (with -profile) options.
  13 # * Optionally (with -profile) obeys the users profile, including
  14 #   AliasFile and send entries.
  15 # * Instead of silently not sending an empty message, notifies user
  16 #   "mhmail: empty message not sent, use -body '' to force."
  17 # * The compiled mhmail dropped a trailing newline from the -body argument.
  18 # * Drops support for undocumented -queue option.
  19
  20 usage='Usage: mhmail [addrs ... [switches]]
  21   switches are:
  22   -at(tach) file [-at(tach) file] ...
  23   -b(ody) text
  24   -c(c) addrs ...
  25   -f(rom) addr
  26   -hea(derfield) name:value [-hea(derfield) name:value] ...
  27   -su(bject) text
  28   -r(esent)
  29   -pr(ofile)
  30   -se(nd)
  31   -nose(nd)
  32   -v(ersion)
  33   -hel(p)
  34   and all post(8)/send(1) switches'
  35
  36 bindir=`dirname $0`
  37 nmhbindir=`cd "${bindir}" && pwd`
  38
  39 #### Checks for missing mandatory arguments.
  40 checkforargs() {
  41   if [ ${attacharg} -eq 1 ]; then
  42     printf "mhmail: missing argument to -attach\n"; exit 1
  43   elif [ ${bodyarg} -eq 1 ]; then
  44     printf "mhmail: missing argument to -body\n"; exit 1
  45   elif [ ${ccarg} -eq 1  -a  "${cclist}"x = x ]; then
  46     printf "mhmail: missing argument to -cc\n"; exit 1
  47   elif [ ${fromarg} -eq 1 ]; then
  48     printf "mhmail: missing argument to -from\n"; exit 1
  49   elif [ ${headerfieldarg} -eq 1 ]; then
  50     printf "mhmail: missing argument to -headerfield\n"; exit 1
  51   elif [ ${subjectarg} -eq 1 ]; then
  52     printf "mhmail: missing argument to -subject\n"; exit 1
  53   fi
  54 }
  55
  56 if [ $# -eq 0 ]; then
  57   #### Emulate mhmail for reading mail.
  58   exec "${nmhbindir}"/inc
  59 else
  60   #### Go through all the switches so we can build the draft.
  61   tolist=                     ## To: addresses
  62   attacharg=0                 ## whether currently handling -attach
  63   attach_send_switch_added=0  ## whether added "-attach Nmh-Attachment" switch
  64   body=                       ## contents of the message body
  65   bodyarg=0                   ## whether currently handling -body
  66   cclist=                     ## Cc: addresses
  67   ccarg=0                     ## whether currently handling -cc
  68   from=                       ## From: contents
  69   fromarg=0                   ## whether currently handling -from
  70   headerfieldlist=            ## header fields to be added to draft
  71   headerfieldarg=0            ## whether currently handling -headerfield
  72   mhmailswitch=0              ## whether currently handling any mhmail switch
  73   subject=                    ## Subject: contents
  74   subjectarg=0                ## whether currently handling -subject
  75   resent=0                    ## whether resending
  76   postsendargs=               ## switches to pass on to post or send
  77   post_send_switch_arg=0      ## whether currently handling a post/send switch
  78   use_send=0                  ## use post (default) or send (-profile)
  79   sendsw=1                    ## to send (default) or not to send
  80   for arg in "$@"; do
  81     case "${arg}" in
  82       #### Post and send won't accept -f -or -s because they'd be
  83       #### ambiguous, so no conflicts with them.  And they don't have
  84       #### -b, -c, -r, -t.  For the new switches that compiled mhmail
  85       #### didn't have:  let -p indicate mhmail -profile, not send
  86       #### -port.  -send masks the send(1) -send switch.  -attach
  87       #### masks the send(1) -attach switch.
  88       -at|-att|-atta|-attac|-attach)
  89          mhmailswitch=1
  90          attacharg=1
  91          use_send=1
  92          if [ ${attach_send_switch_added} -eq 0 ]; then
  93            #### Override any send -attach switch in user's profile.
  94            postsendargs=\
  95 "${postsendargs:+${postsendargs} }-attach Nmh-Attachment"
  96            attach_send_switch_added=1
  97          fi ;;
  98       -b|-bo|-bod|-body) mhmailswitch=1; bodyarg=1 ;;
  99       -c|-cc) mhmailswitch=1; ccarg=1 ;;
 100       -f|-fr|-fro|-from) mhmailswitch=1; fromarg=1 ;;
 101       -hea|-head|-heade|-header|-headerf|-headerfi|-headerfie|-headerfiel|\
 102 -headerfield) mhmailswitch=1; headerfieldarg=1 ;;
 103       -hel|-help) printf "%s\n" "${usage}"; exit ;;
 104       -nose|-nosen|-nosend) mhmailswitch=1; sendsw=0 ;;
 105       -p|-pr|-pro|-prof|-profi|-profil|-profile) mhmailswitch=1; use_send=1 ;;
 106       -resend) printf "mhmail: did you mean -resent instead of -resend?\n" 1>&2
 107          exit 1 ;;
 108       -r|-re|-res|-rese|-resen|-resent) mhmailswitch=1; resent=1 ;;
 109       -se|-sen|-send) mhmailswitch=1; sendsw=1 ;;
 110       -su|-sub|-subj|-subje|-subjec|-subject) mhmailswitch=1; subjectarg=1 ;;
 111       -v|-ve|-ver|-vers|-versi|-versio|-version)
 112          #### Cheat instead of using autoconf and make to fill in the version.
 113          "${nmhbindir}"/mhpath -v | sed 's/mhpath/mhmail/'; exit ;;
 114       -*) if [ ${mhmailswitch} -eq 1 ]; then
 115             checkforargs
 116             mhmailswitch=0
 117           fi
 118           post_send_switch_arg=1
 119           postsendargs="${postsendargs:+${postsendargs} }${arg}" ;;
 120       *) mhmailswitch=0
 121          if [ ${bodyarg} -eq 1 ]; then
 122            body="${arg}
 123 "
 124            bodyarg=0
 125            #### Allow -body "" by using just a newline for the body.
 126            [ "${body}"x = x ]  &&  body='
 127 '
 128          elif [ ${fromarg} -eq 1 ]; then
 129            from="${arg}"
 130            fromarg=0
 131          elif [ ${subjectarg} -eq 1 ]; then
 132            subject="${arg}"
 133            subjectarg=0
 134          elif [ ${attacharg} -eq 1 ]; then
 135            headerfieldlist="${headerfieldlist:+${headerfieldlist}}\
 136 Nmh-Attachment: ${arg}
 137 "
 138            attacharg=0
 139          elif [ ${headerfieldarg} -eq 1 ]; then
 140            #### It's not strictly necessary to have one space after
 141            #### the : that separates the header field name from the
 142            #### body, but do it to avoid surprising someone.
 143            add=`printf "${arg}" | sed -e 's/:/: /' -e 's/:  /: /'`
 144            headerfieldlist="${headerfieldlist:+${headerfieldlist}}${add}
 145 "
 146            headerfieldarg=0
 147          elif [ ${post_send_switch_arg} -eq 1 ]; then
 148            postsendargs="${postsendargs:+${postsendargs} }${arg}"
 149          elif [ ${ccarg} -eq 1 ]; then
 150            #### Never reset ccarg to 0, for compatibilty with compiled mhmail.
 151            cclist="${cclist:+${cclist}, }${arg}"
 152          else
 153            #### An address.
 154            tolist="${tolist:+${tolist}, }${arg}"
 155          fi ;;
 156     esac
 157   done
 158
 159   #### Check for at least one address and -from.
 160   if [ "${tolist}"x = x ]; then
 161     printf "mhmail: usage: mhmail addrs ... [switches]\n"; exit 1
 162   fi
 163   if [ "${from}"x = x ]; then
 164     nmhlibdir=`${nmhbindir}/mhparam libdir`/
 165     from=`${nmhlibdir}ap -format '%(localmbox)' 0`
 166   fi
 167
 168   #### Check for missing mandatory arguments.
 169   checkforargs
 170
 171   #### Build header.
 172   [ ${resent} -eq 0 ]  &&  prefix=  ||  prefix='Resent-'
 173   header="${prefix}To: ${tolist}
 174 "
 175   [ "${cclist}"x = x ]  ||  header="${header}${prefix}Cc: ${cclist}
 176 "
 177   [ "${subject}"x = x ]  ||  header="${header}${prefix}Subject: ${subject}
 178 "
 179   [ "${from}"x = x ]  ||  header="${header}${prefix}From: ${from}
 180 "
 181
 182   if [ "${headerfieldlist}" ]; then
 183     header="${header}${headerfieldlist}"
 184   fi
 185
 186   #### Set up a file to supply as a draft to post/send.  And set a
 187   #### trap to remove it.  send moves the file to a backup, so it will
 188   #### remove that, too.
 189   umask 077
 190   tmpdir="${MHTMPDIR:-${TMPDIR:-${TMP:-`${nmhbindir}/mhpath +`}}}"
 191   tmpfile="${tmpdir}/mhmail$$"
 192   tmpfilebackup="${tmpdir}/[,#]mhmail$$"
 193   tmpfileresent=
 194
 195   message_file=
 196   if [ ${resent} -eq 0 ]; then
 197     #### Add blank line after header if not resending.
 198     header="${header}
 199 "
 200     message_file="${tmpfile}"
 201   else
 202     if [ ${use_send} -eq 0 ]; then
 203       postsendargs="${postsendargs:+${postsendargs} }-dist"
 204       message_file="${tmpfile}"
 205     else
 206       #### When resending with send, tmpfile will just contain the
 207       #### Resent- header fields.  "${tmpfileresent}" will contain
 208       #### the message that is being resent.
 209       tmpfileresent="${tmpdir}/mhmail-resent$$"
 210       mhdist=1; export mhdist
 211       mhaltmsg=${tmpfileresent}; export mhaltmsg
 212       message_file="${tmpfileresent}"
 213       printf "" >"${message_file}"  || exit 2
 214     fi
 215   fi
 216
 217   trap 'rm -f '"${tmpfile}"' '"${tmpfilebackup}"' '"${tmpfileresent}" EXIT
 218
 219   if [ "${body}"x = x ]; then
 220     #### First put message header in the file.
 221     printf "%s" "${header}" >"${tmpfile}" || exit 2
 222
 223     tmpfile_size_before=`wc -c "${message_file}"`
 224     #### Now grab the body from stdin.  cat >> handles blank lines
 225     #### better than body=`cat`.
 226     cat >>"${message_file}" || exit 2
 227     tmpfile_size_after=`wc -c "${message_file}"`
 228
 229     #### Don't allow an empty body (from stdin).  Use string
 230     #### comparison so we don't have to strip the filename, etc.
 231     if [ "${tmpfile_size_before}" = "${tmpfile_size_after}" ]; then
 232       printf "mhmail: empty message not sent, use -body '' to force.\n" 1>&2
 233       exit 1
 234     fi
 235
 236     #### Add trailing newline to body if it doesn't have one.
 237     if [ `tail -n 1 "${message_file}" | wc -l` -ne 1 ]; then
 238       printf "\n" >>"${message_file}" || exit 2
 239     fi
 240   else
 241     #### Add trailing newline to body if it doesn't have one.
 242     [ `printf "${body}" | tail -n 1 | wc -l` -ne 1 ]  &&  body="${body}
 243 "
 244
 245     if [ "${tmpfileresent}" ]; then
 246       #### Put just the new message header in the file.
 247       printf "%s" "${header}" >"${tmpfile}" || exit 2
 248       #### and the body in the file to resend.
 249       printf "${body}" >"${tmpfileresent}" || exit 2
 250     else
 251       #### Put message header and body in the file.
 252       printf "%s" "${header}${body}" >"${tmpfile}" || exit 2
 253     fi
 254   fi
 255
 256   if [ ${sendsw} -eq 0 ]; then
 257     cat "${tmpfile}"
 258   else
 259     if [ ${use_send} -eq 0 ]; then
 260       post_or_send=`${nmhbindir}/mhparam postproc`
 261     else
 262       post_or_send="${nmhbindir}/send"
 263     fi
 264
 265     if "${post_or_send}" "${tmpfile}" ${postsendargs}; then
 266       exit
 267     else
 268       printf "Letter saved in dead.letter\n"
 269       #### exec skips the trap set above.
 270       [ "${tmpfileresent}" ]  &&  rm -f "${tmpfileresent}"
 271       exec mv "${tmpfile}" dead.letter
 272     fi
 273   fi
 274 fi