/usr/share/doc/esmtp/examples/esmtp-wrapper is in esmtp 1.2-12.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | #!/bin/bash
# Esmtp-wrapper adds shell based queueing support to esmtp.
# Copyright (C) 2007 by Phil Sutter <phil@nwl.cc>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
qdir="$HOME/.esmtp_queue"
deliver_lock="$qdir/.deliver_lock"
esmtp="/usr/bin/esmtp"
mktemp="/bin/mktemp"
dotlockfile="/usr/bin/dotlockfile"
__do_check_program() { # (path to program)
[ -x "$1" ] || { \
echo "required program '$1' not found, exiting"
exit 1
}
}
check_programs() { # ()
__do_check_program "$esmtp"
__do_check_program "$mktemp"
__do_check_program "$dotlockfile"
}
queue_mail() { # ($@)
local ret=0
mkdir -p "$qdir" || {
echo "unable to create queue dir $qdir" 2>&1
return 1
}
mdir="`$mktemp -d "$qdir/XXXXXXXX"`"
[ -d "$mdir" ] || {
echo "unable to create tempdir inside $qdir" 2>&1
return 1
}
touch "$mdir/lock"
echo "$@" >"$mdir/cmd" || ret=1
cat </dev/stdin >"$mdir/mail" || ret=1
[ $ret -eq 0 ] || {
echo "could not enqueue mail in dir $mdir" 2>&1
return 1
}
chmod 0600 $mdir/* || echo "warning setting secure permissions failed!" 2>&1
rm "$mdir/lock"
return 0
}
show_mail() { # ($mdir)
echo "mail in dir $1:"
printf '\t%s' "`grep ^From: "$1/mail"`"
printf '\t%s' "`grep ^To: "$1/mail"`"
[ -f "$1/lock" ] && printf '\t%s' "[LOCKED]"
printf '\t%s\n' "`grep ^Date: "$1/mail"`"
}
show_queue() { # ()
local i=0
local lockwarn=0
for dir in $qdir/*; do
[ ! -d "$dir" ] && continue
[ -f "$dir/lock" ] && lockwarn=1
show_mail $dir
let i++
done
echo "$i mails to deliver"
[ $lockwarn -eq 0 ] || { \
printf '\n%s\n' "Warning: locked mails in queue!"; \
printf '%s' "This means that either enqueueing is in "; \
printf '%s\n' "progress, or it failed for some reason."; \
}
}
send_mail() { # ($mdir)
$esmtp $(<"$1/cmd") <"$1/mail" && \
rm -rf "$1" || return 1
return $?
}
deliver_queue() { # ([background])
local undelivered=0
# when delivering in background, there is time to wait
# for a potential burst run (git-send-email, e.g.) or
# exiting of other delivery jobs.
if [[ "$1" = "background" ]]; then
sleep 5
fi
if ! $dotlockfile -p -l "$deliver_lock"; then
return 1
fi
for dir in $qdir/*; do
[ ! -d "$dir" ] && continue
[ -f "$dir/lock" ] && continue
send_mail "$dir"
undelivered=`expr $undelivered + $?`
done
$dotlockfile -u "$deliver_lock"
return $undelivered
}
ME=`basename "$0"`
check_programs # possible program exit point
case "$ME" in
sendmail|esmtp)
queue_mail "$@" || return 1
deliver_queue "background" &
;;
deliver)
deliver_queue
;;
mailq)
if [ x"$1" = x"-q" ]; then
deliver_queue
else
show_queue
fi
;;
*)
exit 1
;;
esac
exit $?
|