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#! /bin/sh # # mhmail -- simple mail program # # This code is Copyright (c) 2012, by the authors of nmh. See the # COPYRIGHT file in the root directory of the nmh distribution for # complete copyright information. # # Emulation of compiled mhmail(1), with these differences: # * Adds -send/-nosend, -headerfield, and -attach options. # * Adds optional -to switch for recipient addresses. # * Supports all post(8) (by default, without -profile) or send(1) # (with -profile) options. # * Optionally (with -profile) obeys the users profile, including # AliasFile and send entries. # * Instead of silently not sending an empty message, notifies user # "mhmail: empty message not sent, use -body '' to force." # * The compiled mhmail dropped a trailing newline from the -body argument. # * Drops support for undocumented -queue option. usage='Usage: mhmail [-t(o)] addrs ... [switches] switches are: -at(tach) file [-at(tach) file] ... -b(ody) text -c(c) addrs ... -f(rom) addr -hea(derfield) name:value [-hea(derfield) name:value] ... -su(bject) text -r(esent) -pr(ofile) -se(nd) -nose(nd) -v(ersion) -hel(p) and all post(8)/send(1) switches mhmail with no arguments is equivalent to inc' #### Find location of a program. Bourne shell just puts the name in #### $0 if it's found from the PATH, so search that if necessary. finddir() { case $1 in */*) dirname "$1" ;; * ) IFS=: for d in $PATH; do [ -f "${d:=.}/$1" -a -x "$d/$1" ] && printf %s "$d" && break done ;; esac } help() { printf '%s\n' "$usage" #### Print the nmh intro text. ${nmhbindir}/mhparam -help | sed -n -e '/^$/,$p' exit } #### Convenience function to allow concise code below. die() { [ $# -gt 0 ] && printf '%s\n' "$1" >&2 exit 1 } bindir=`finddir $0` nmhbindir=`cd "$bindir" && pwd` nmhlibexecdir=`$nmhbindir/mhparam libexecdir` case `printf 'OK\n' | tail -n 1 2>&1` in OK) tail='tail -n ' ;; *) tail='tail -' ;; esac #### Checks for missing mandatory arguments. checkforargs() { if [ $attacharg -eq 1 ]; then die 'mhmail: missing argument to -attach' elif [ $bodyarg -eq 1 ]; then die 'mhmail: missing argument to -body' elif [ $ccarg -eq 1 -a "$cclist"x = x ]; then die 'mhmail: missing argument to -cc' elif [ $fromarg -eq 1 ]; then die 'mhmail: missing argument to -from' elif [ $headerfieldarg -eq 1 ]; then die 'mhmail: missing argument to -headerfield' elif [ $subjectarg -eq 1 ]; then die 'mhmail: missing argument to -subject' elif [ $toarg -eq 1 ]; then die 'mhmail: missing argument to -to' fi } if [ $# -eq 0 ]; then #### Emulate mhmail for reading mail. exec "$nmhbindir"/inc fi #### Go through all the switches so we can build the draft. tolist= ## To: addresses toarg=0 ## whether currently handling -to attacharg=0 ## whether currently handling -attach attachind=Attach ## attachment indicator body= ## contents of the message body bodyarg=0 ## whether currently handling -body cclist= ## Cc: addresses ccarg=0 ## whether currently handling -cc from= ## From: contents fromarg=0 ## whether currently handling -from headerfieldlist= ## header fields to be added to draft headerfieldarg=0 ## whether currently handling -headerfield mhmailswitch=0 ## whether currently handling any mhmail switch subject= ## Subject: contents subjectarg=0 ## whether currently handling -subject resent=0 ## whether resending postsendargs= ## switches to pass on to post or send post_send_switch_arg=0 ## whether currently handling a post/send switch use_send=0 ## use post (default) or send (-profile) sendsw=1 ## to send (default) or not to send for arg in "$@"; do case $arg in #### Post and send won't accept -f -or -s because they'd be #### ambiguous, so no conflicts with them. And they don't have #### -b, -c, -r, -t. For the new switches that compiled mhmail #### didn't have: let -p indicate mhmail -profile, not send #### -port. -send masks the send(1) -send switch. -attach #### masks the send(1) -attach switch. -at|-att|-atta|-attac|-attach) mhmailswitch=1 attacharg=1 use_send=1 ;; -b|-bo|-bod|-body) mhmailswitch=1; bodyarg=1 ;; -c|-cc) mhmailswitch=1; ccarg=1 ;; -f|-fr|-fro|-from) mhmailswitch=1; fromarg=1 ;; -hea|-head|-heade|-header|-headerf|-headerfi|-headerfie|-headerfiel|\ -headerfield) mhmailswitch=1; headerfieldarg=1 ;; -hel|-help) help ;; -nose|-nosen|-nosend) mhmailswitch=1; sendsw=0 ;; -p|-pr|-pro|-prof|-profi|-profil|-profile) mhmailswitch=1; use_send=1 ;; -resend) die 'mhmail: did you mean -resent instead of -resend?' ;; -r|-re|-res|-rese|-resen|-resent) mhmailswitch=1; resent=1 ;; -se|-sen|-send) mhmailswitch=1; sendsw=1 ;; -su|-sub|-subj|-subje|-subjec|-subject) mhmailswitch=1; subjectarg=1 ;; -t|-to) toarg=1; ccarg=0 ;; -v|-ve|-ver|-vers|-versi|-versio|-version) #### Cheat instead of using autoconf and make to fill in the version. "$nmhbindir"/mhpath -v | sed 's/mhpath/mhmail/'; exit ;; -*) if [ $mhmailswitch -eq 1 ]; then checkforargs mhmailswitch=0 fi post_send_switch_arg=1 postsendargs="${postsendargs:+$postsendargs }$arg" ;; *) mhmailswitch=0 if [ $bodyarg -eq 1 ]; then body="$arg " bodyarg=0 #### Allow -body "" by using just a newline for the body. [ "$body"x = x ] && body=' ' elif [ $fromarg -eq 1 ]; then from="$arg" fromarg=0 elif [ $subjectarg -eq 1 ]; then subject="$arg" subjectarg=0 elif [ $attacharg -eq 1 ]; then headerfieldlist="${headerfieldlist:+$headerfieldlist}$attachind: $arg " attacharg=0 elif [ $headerfieldarg -eq 1 ]; then #### It's not strictly necessary to have one space after #### the : that separates the header field name from the #### body, but do it to avoid surprising someone. #### Solaris sed wants the trailing newline in its input. add=`printf '%s\n' "$arg" | sed -e 's/:/: /' -e 's/: /: /'` headerfieldlist="${headerfieldlist:+$headerfieldlist}$add " headerfieldarg=0 elif [ $post_send_switch_arg -eq 1 ]; then postsendargs="${postsendargs:+$postsendargs }$arg" elif [ $ccarg -eq 1 ]; then #### ccarg can only be reset to 0 by -to. cclist="${cclist:+$cclist, }$arg" else #### An address. tolist="${tolist:+$tolist, }$arg" toarg=0 fi ;; esac done #### Check for at least one address and -from. if [ "$tolist"x = x ]; then die 'Usage: mhmail [-t(o)] addrs ... [switches]' fi if [ "$from"x = x ]; then from=`${nmhlibexecdir}/ap -format '%(localmbox)' 0` fi #### Check for missing mandatory arguments. checkforargs #### Build header. [ $resent -eq 0 ] && prefix= || prefix='Resent-' header="${prefix}To: $tolist " [ "$cclist"x = x ] || header="$header${prefix}Cc: $cclist " [ "$subject"x = x ] || header="$header${prefix}Subject: $subject " [ "$from"x = x ] || header="$header${prefix}From: $from " if [ "$headerfieldlist" ]; then header="$header$headerfieldlist" fi #### Set up a file to supply as a draft to post/send. And set a trap #### to remove it. send moves the file to a backup and can create a #### .orig file, so it will remove them, too. umask 077 tmpdir="${MHTMPDIR:-${TMPDIR:-`$nmhbindir/mhpath +`}}" tmpfilename=`cd "$tmpdir" && "${nmhlibexecdir}/mkstemp" -p mhmail` [ $? -ne 0 ] && die "mhmail: failed to create temporary file in $tmpdir" tmpfile="$tmpdir/$tmpfilename" backup_char=`"$nmhbindir"/mhparam sbackup` tmpfilebackup="$tmpdir/${backup_char}${tmpfilename}*" tmpfileresent= message_file= if [ $resent -eq 0 ]; then #### Add blank line after header if not resending. header="$header " message_file="$tmpfile" else if [ $use_send -eq 0 ]; then postsendargs="${postsendargs:+$postsendargs }-dist" message_file="$tmpfile" else #### When resending with send, tmpfile will just contain the #### Resent- header fields. "$tmpfileresent" will contain #### the message that is being resent. tmpfileresent=`"${nmhlibexecdir}/mkstemp" -d "$tmpdir" -p mhmail-resent` [ $? -ne 0 ] && die "mhmail: failed to create temporary file in $tmpdir" mhdist=1; export mhdist mhaltmsg=$tmpfileresent; export mhaltmsg message_file="$tmpfileresent" printf '' >"$message_file" || exit 2 fi fi trap "rm -f '$tmpfile' $tmpfilebackup ${tmpfileresent:+'$tmpfileresent'}" 0 if [ "$body"x = x ]; then #### First put message header in the file. printf %s "$header" >"$tmpfile" || exit 2 tmpfile_size_before=`wc -c "$message_file"` #### Now grab the body from stdin. cat >> handles blank lines #### better than body=`cat`. cat >>"$message_file" || exit 2 tmpfile_size_after=`wc -c "$message_file"` #### Don't allow an empty body (from stdin). Use string #### comparison so we don't have to strip the filename, etc. if [ "$tmpfile_size_before" = "$tmpfile_size_after" ]; then die 'mhmail: empty message not sent, use -body '"''"' to force.' fi #### Add trailing newline to body if it doesn't have one. if [ `${tail}1 "$message_file" | wc -l` -ne 1 ]; then printf '\n' >>"$message_file" || exit 2 fi else #### Add trailing newline to body if it doesn't have one. [ `printf %s "$body" | ${tail}1 | wc -l` -ne 1 ] && body="$body " if [ "$tmpfileresent" ]; then #### Put just the new message header in the file. printf %s "$header" >"$tmpfile" || exit 2 #### and the body in the file to resend. printf %s "$body" >"$tmpfileresent" || exit 2 else #### Put message header and body in the file. printf %s "$header$body" >"$tmpfile" || exit 2 fi fi if [ $sendsw -eq 0 ]; then cat "$tmpfile" else if [ $use_send -eq 0 ]; then post_or_send=`$nmhbindir/mhparam postproc` else post_or_send="$nmhbindir/send" fi if "$post_or_send" $postsendargs "$tmpfile"; then exit else status=$? mv -f "$tmpfile" dead.letter printf 'Letter saved in dead.letter\n' >&2 exit $status fi fi