70 lines
3.1 KiB
Bash
Executable File
70 lines
3.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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datapath="/usr/local/etc/dms"
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dead_man_timestamp_path="${datapath}/dmt"
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# Recommended: Any message you put in a message file should have a maximum of 80 characters per line.
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dead_man_message_path="${datapath}/dmm"
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dead_man_message_warning_path="${datapath}/dmm_warning"
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# If you don't want to attach any files, set the variable to ()
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# If you intend to share secrets, an encrypted file should be sent as attachment.
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# The key should be known to the recipients beforehand.
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dead_man_attachment_paths=("${datapath}/message.gpg" "/path/to/other/important/file")
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warning_sent="${datapath}/wsent"
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dms_sent="${datapath}/dmssent"
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# In this case, the mail(s) have been sent already.
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[ -f "${dms_sent}" ] && echo "The switch has been triggered already." && exit 0
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dead_name="Your Name"
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dead_address="${dead_name} <your@email.address>"
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from_address="DMS <no-reply@email.address>"
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send_addresses=("One <one@email.address>" "Two <two@email.address>" "Three <three@email.address>")
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warningsubject="[DMS] Setting off in 24 hours!"
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sentsubject="[DMS] The switch has been set off."
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subjectline="${dead_name} is unresponsive, possible death."
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[ ! -f "${dead_man_timestamp_path}" ] && echo "Timestamp file not found. Exiting." && exit 1
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timestamp="$(cat "${dead_man_timestamp_path}")"
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[ -z "${timestamp}" ] && echo "No timestamp in timestamp file. Exiting." && exit 1
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time_now="$(date +%s)"
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# In hours
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time_diff=$(( ( "${time_now}" - "${timestamp}" ) / 3600 ))
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echo "${time_diff} hours have passed since the last sign of life."
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# 336 hours are 14 days
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if [ "$time_diff" -ge 336 ]; then
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echo "The switch is now being triggered."
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mail_text="Last login: $(date --date="@${timestamp}")"$'\n'"$(cat "${dead_man_message_path}")"
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missing_attachments=false
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attachments=()
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for a in "${dead_man_attachment_paths[@]}"; do
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if [ -f "${a}" ]; then
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attachments+=('-a' "${a}")
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elif [ "${missing_attachments}" = false ]; then
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mail_text="${mail_text}"$'\n'$'\n'"Some preplanned attachments could not be attached."
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fi
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done
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for f in "${send_addresses[@]}"; do
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echo "Sending mail to ${f}..."
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printf "%s\n" "${mail_text}" | mail -s "$subjectline" "${attachments[@]}" -r "$from_address" "$f"
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done
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echo "Sending confirmation mail to address of dead person..."
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mail -s "$sentsubject" -r "$from_address" "$dead_address" < /dev/null
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echo "All further executions of this script will now result in an immediate exit."
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touch "${dms_sent}"
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exit 0
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fi
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# In this case, the mail has been sent already.
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[ -f "${warning_sent}" ] && echo "The warning has been sent already." && exit 0
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# If the time difference has reached 336-24 hours before the send threshold, we send a warning (if not already done)
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if [ "$time_diff" -ge 312 ]; then
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mail_text="Last login: $(date --date="@${timestamp}")"$'\n'"$(cat "${dead_man_message_warning_path}")"
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echo "Sending warning email..."
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printf "%s\n" "${mail_text}" | mail -s "$warningsubject" -r "$from_address" "$dead_address"
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echo "No further warning emails will be sent."
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touch "${warning_sent}"
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fi
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