#! /bin/sh
#
-# mhmail.c -- simple mail program
+# 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) using nmh post(8) or send(1).
-# Differences from compiled mhmail:
+# Emulation of compiled mhmail(1), with these differences:
+# * 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.
# * 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.
# * Adds -debug option for debugging (sending, not incorporating new mail).
+# * Drops support for undocumented -queue option.
#
# To do:
-# * set prefix properly so that it supports distcheck
-# * support undocumented mhmail options?
+# * add support for undocumented -resent compiled mhmail switch
+# * add -attach file ... switch
usage='Usage: mhmail [addrs ... [switches]]
switches are:
-d(ebug)
and all post(8)/send(1) switches'
-#### Use autoconf to fill in bindir.
-# This doesn't work with distcheck.
-# prefix=@prefix@
-# exec_prefix=@exec_prefix@
-# nmhbindir=@bindir@
-nmhbindir=`dirname $0`
-
-#### Or if configure/make haven't been run yet, figure out nmhbindir at runtime.
-case ${nmhbindir} in
- @*@) nmhbindir=`dirname $0` ;;
-esac
+bindir=`dirname $0`
+nmhbindir=`cd "${bindir}" && pwd`
if [ $# -eq 0 ]; then
#### Emulate mhmail for reading mail.
- exec ${nmhbindir}/inc
+ exec "${nmhbindir}"/inc
else
#### Go through all the switches so we can build the draft.
tolist=
bodyarg=0
cclist=
ccarg=0
- havefrom=0
- header=
- otherarg=0
+ from=
+ fromarg=0
+ subject=
+ subjectarg=0
postsendargs=
switcharg=0
use_send=0
debug=
for arg in "$@"; do
- case ${arg} in
+ case "${arg}" in
-*) switcharg=0
esac
- case ${arg} in
+ case "${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 or -c. For the new switches that compiled mhmail didn't
-b|-bo|-bod|-body) bodyarg=1 ;;
-c|-cc) ccarg=1 ;;
-d|-de|-deb|-debu|-debug) debug=echo ;;
- -f|-fr|-fro|-from) header="${header}From:"; otherarg=1; havefrom=1 ;;
+ -f|-fr|-fro|-from) fromarg=1 ;;
-h|-he|-hel|-help) printf "%s\n" "${usage}"; exit ;;
-p|-pr|-pro|-prof|-profi|-profil|-profile) use_send=1 ;;
- -s|-su|-sub|-subj|-subje|-subjec|-subject)
- header="${header}Subject:"; otherarg=1 ;;
+ -s|-su|-sub|-subj|-subje|-subjec|-subject) subjectarg=1 ;;
-v|-ve|-ver|-vers|-versi|-versio|-version)
- #### Cheat instead of using autoconf and make to fill in the version.
- ${nmhbindir}/mhpath -v | sed 's/mhpath/mhmail/'; exit ;;
+ #### Cheat instead of using autoconf and make to fill in the version.
+ "${nmhbindir}"/mhpath -v | sed 's/mhpath/mhmail/'; exit ;;
-*) postsendargs="${postsendargs:+${postsendargs} }${arg}"; switcharg=1 ;;
- *) if [ ${ccarg} -eq 1 ]; then
- cclist="${cclist:+${cclist}, }${arg}"; ccarg=0
- elif [ ${bodyarg} -eq 1 ]; then
+ *) if [ ${bodyarg} -eq 1 ]; then
body="${arg}
"; bodyarg=0
#### Allow -body "" by using just a newline for the body.
[ "${body}"x = x ] && body='
'
- elif [ ${otherarg} -eq 1 ]; then
- #### Always end ${header} with a newline.
- header="${header:+${header} }${arg}
-"; otherarg=0
+ elif [ ${fromarg} -eq 1 ]; then
+ from="${arg}"; fromarg=0
+ elif [ ${subjectarg} -eq 1 ]; then
+ subject="${arg}"; subjectarg=0
elif [ ${switcharg} -eq 1 ]; then
postsendargs="${postsendargs:+${postsendargs} }${arg}"
+ elif [ ${ccarg} -eq 1 ]; then
+ #### Never reset ccarg to 0, for compatibilty with compiled mhmail.
+ cclist="${cclist:+${cclist}, }${arg}"
else
#### An address.
tolist="${tolist:+${tolist}, }${arg}"
#### Check for at least one address and -from.
if [ "${tolist}"x = x ]; then
- printf "mhmail: usage: mhmail addrs ... [switches]\n"; exit 1
+ printf "mhmail: usage: mhmail addrs ... [switches]\n"
+ exit 1
fi
- if [ "${havefrom}" = 0 ]; then
- nmhlibdir=`${nmhbindir}/mhparam libdir`
- header="${header:+${header}}From: "\
-`${nmhlibdir}/ap -format '%(localmbox)' 0`'
-'
+ if [ "${from}"x = x ]; then
+ nmhlibdir=`${nmhbindir}/mhparam libdir`/
+ #### If nmhlibdir isn't right, assume that the nmh lib dir is on the PATH.
+ [ -x "${nmhlibdir}ap" ] || nmhlibdir=
+ from=`${nmhlibdir}ap -format '%(localmbox)' 0`
fi
- #### If no -body, read message from stdin the easy way.
+ #### Build header.
+ header="To: ${tolist}
+"
+ [ "${cclist}"x = x ] || header="${header}Cc: ${cclist}
+"
+ [ "${subject}"x = x ] || header="${header}Subject: ${subject}
+";
+ [ "${from}"x = x ] || header="${header}From: ${from}
+";
+ header="${header}
+"
+
+ #### Set up a file to supply as a draft to send/post. And set a
+ #### trap to remove it. send moves the file to a backup, so it will
+ #### remove that, too.
+ umask 077
+ tmpdir="${MHTMPDIR:-${TMPDIR:-${TMP:-`${nmhbindir}/mhpath +`}}}"
+ tmpfil="${tmpdir}/mhmail$$"
+ tmpfilbackup="${tmpdir}/[,#]mhmail$$"
+ trap 'rm -f '"${tmpfil}"' '"${tmpfilbackup}" EXIT
+
if [ "${body}"x = x ]; then
- #### This will lose any trailing newline(s), so we can't
- #### send the message when stdin contains only newlines.
- body=`cat`
+ #### First put message header in the file. cat >> handles blank
+ #### lines better than body=`cat`.
+ printf "%s" "${header}" > "${tmpfil}" || exit 1
+
+ tmpfile_size_before=`wc -c "${tmpfil}"`
+ #### Now grab the body from stdin.
+ cat >>"${tmpfil}"
+ tmpfile_size_after=`wc -c "${tmpfil}"`
- #### Don't allow an empty body (from stdin).
- if [ "${body}"x = x ]; then
- printf "empty body, message not sent\n"
+ #### Don't allow an empty body (from stdin). Use string
+ #### comparison so we don't have to strip the filename, etc.
+ if [ "${tmpfile_size_before}" = "${tmpfile_size_after}" ]; then
+ printf "mhmail: empty message not sent, use -body '' to force.\n" 1>&2
exit 1
fi
#### Add trailing newline to body if it doesn't have one.
[ `printf "${body}" | tail -n 1 | wc -l` -ne 1 ] && body="${body}
"
+ else
+ #### Put message header and body in the file.
+ printf "%s" "${header}${body}" > "${tmpfil}" || exit 1
fi
- #### Set up a tmpfil and trap to remove it. send moves the file to a backup.
- tmpdir="${MHTMPDIR:-${TMPDIR:-${TMP:-`${nmhbindir}/mhpath +`}}}"
- tmpfil="${tmpdir}/mhmail$$"
- tmpfilbackup="${tmpdir}/[,#]mhmail$$"
- trap "rm -f ${tmpfil} ${tmpfilbackup}" EXIT
-
- #### Put message header and body in file to supply as draft to
- #### send/post. ${header} always ends with a newline, so this adds
- #### the blank that separates the body.
- umask 077
- printf "%s" "To: ${tolist}
-Cc: ${cclist}
-${header}
-${body}" > ${tmpfil} || exit 1
-
if [ "${debug}" ]; then
- printf "%s:\n" `ls -1 ${tmpfil}`
+ printf "%s:\n" `ls -1 "${tmpfil}"`
cat "${tmpfil}"
fi
if [ "$use_send" -eq 0 ]; then
- post_or_send="${nmhlibdir:=`${nmhbindir}/mhparam libdir`}/post"
+ post_or_send=`${nmhbindir}/mhparam postproc`
else
post_or_send="${nmhbindir}/send"
fi
- if $debug ${post_or_send} ${tmpfil} ${postsendargs}; then
+ if $debug "${post_or_send}" "${tmpfil}" ${postsendargs}; then
:
else
printf "Letter saved in dead.letter\n"
#### exec skips the trap set above.
- exec mv ${tmpfil} dead.letter
+ exec mv "${tmpfil}" dead.letter
fi
fi
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