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#!/bin/sh
# send mail script for adblock notifications
# Copyright (c) 2015-2022 Dirk Brenken (dev@brenken.org)
# This is free software, licensed under the GNU General Public License v3.
# Please note: you have to manually install and configure the package 'msmtp' before using this script
# set (s)hellcheck exceptions
# shellcheck disable=all
LC_ALL=C
PATH="/usr/sbin:/usr/bin:/sbin:/bin"
[ -r "/lib/functions.sh" ] && . "/lib/functions.sh"
adb_debug="$(uci_get adblock global adb_debug "0")"
adb_mailsender="$(uci_get adblock global adb_mailsender "no-reply@adblock")"
adb_mailreceiver="$(uci_get adblock global adb_mailreceiver)"
adb_mailtopic="$(uci_get adblock global adb_mailtopic "adblock notification")"
adb_mailprofile="$(uci_get adblock global adb_mailprofile "adb_notify")"
adb_ver="${1}"
adb_mail="$(command -v msmtp)"
adb_logger="$(command -v logger)"
adb_logread="$(command -v logread)"
adb_rc="1"
f_log() {
local class="${1}" log_msg="${2}"
if [ -x "${adb_logger}" ]; then
"${adb_logger}" -p "${class}" -t "adblock-${adb_ver}[${$}]" "${log_msg}"
else
printf "%s %s %s\n" "${class}" "adblock-${adb_ver}[${$}]" "${log_msg}"
fi
}
if [ -z "${adb_mailreceiver}" ]; then
f_log "err" "please set the mail receiver with the 'adb_mailreceiver' option"
exit ${adb_rc}
fi
[ "${adb_debug}" = "1" ] && debug="--debug"
adb_mailhead="From: ${adb_mailsender}\nTo: ${adb_mailreceiver}\nSubject: ${adb_mailtopic}\nReply-to: ${adb_mailsender}\nMime-Version: 1.0\nContent-Type: text/html;charset=utf-8\nContent-Disposition: inline\n\n"
# info preparation
#
sys_info="$(
strings /etc/banner 2>/dev/null
ubus call system board | sed -e 's/\"release\": {//' | sed -e 's/^[ \t]*//' | sed -e 's/[{}\",]//g' | sed -e 's/[ ]/ \t/' | sed '/^$/d' 2>/dev/null
)"
adb_info="$(/etc/init.d/adblock status 2>/dev/null)"
rep_info="${2}"
if [ -x "${adb_logread}" ]; then
log_info="$("${adb_logread}" -l 100 -e "adblock-" | awk '{NR=1;max=120;if(length($0)>max+1)while($0){if(NR==1){print substr($0,1,max)}else{print substr($0,1,max)}{$0=substr($0,max+1);NR=NR+1}}else print}')"
fi
# mail body
#
adb_mailtext="<html><body><pre style='display:block;font-family:monospace;font-size:1rem;padding:20;background-color:#f3eee5;white-space:pre'>"
adb_mailtext="${adb_mailtext}\n<strong>++\n++ System Information ++\n++</strong>\n${sys_info}"
adb_mailtext="${adb_mailtext}\n\n<strong>++\n++ Adblock Information ++\n++</strong>\n${adb_info}"
if [ -n "${rep_info}" ]; then
adb_mailtext="${adb_mailtext}\n\n<strong>++\n++ Report Information ++\n++</strong>\n${rep_info}"
fi
adb_mailtext="${adb_mailtext}\n\n<strong>++\n++ Logfile Information ++\n++</strong>\n${log_info}"
adb_mailtext="${adb_mailtext}</pre></body></html>"
# send mail
#
if [ -x "${adb_mail}" ]; then
printf "%b" "${adb_mailhead}${adb_mailtext}" 2>/dev/null | "${adb_mail}" ${debug} -a "${adb_mailprofile}" "${adb_mailreceiver}" >/dev/null 2>&1
adb_rc=${?}
f_log "info" "mail sent to '${adb_mailreceiver}' with rc '${adb_rc}'"
else
f_log "err" "msmtp mail daemon not found"
fi
exit ${adb_rc}
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