90 lines
2.8 KiB
Bash
Executable file
90 lines
2.8 KiB
Bash
Executable file
#!/bin/bash
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# Version: 0.1.0
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# Copyright (c) 2023:
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# Darren 'Tadgy' Austin <darren (at) afterdark.org.uk>
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# Licensed under the terms of the GNU General Public License version 3.
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#
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# Wrapper around /opt/bin/mirror to keep a log of the mirroring session, and email it.
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# Configuration.
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COMMAND="/opt/bin/mirror"
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LOGSDIR="/var/log/duplication/mirroring/$(printf "%(%Y/%m)T")"
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LOGFILE="$(printf "%(%Y%m%d-%H%M%S)T")-$$"
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MIN_LOGFILE_SIZE="550"
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# Only allow one copy of the script to run at any time.
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# shellcheck disable=SC2154
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if [[ "$FLOCK" != "$0" ]]; then
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# shellcheck disable=SC2093
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exec env FLOCK="$0" flock -E 10 -e -n "$0" "$0" "$@"
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ERR="$?"
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if (( ERR == 10 )); then
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# File is locked, exit now.
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exit 0
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elif (( ERR > 0 )); then
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printf "%s: %s\\n" "${0##*/}" "flock execution error" >&2
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exit 1
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fi
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fi
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# Source the mail configuration.
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source /etc/mail.conf "backups" 2>/dev/null || {
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printf "%s: %s\\n" "${0##*/}" "Failed to source /etc/mail.conf" >&2
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exit 1
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}
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# Make sure the logs directory exists.
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mkdir -p "$LOGSDIR" 2>/dev/null || {
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printf "%s: %s\\n" "${0##*/}" "Failed to create logs directory" >&2
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exit 1
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}
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# Make sure the command to do the work is runnable.
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[[ ! -x "$COMMAND" ]] && {
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printf "%s: '%s' %s\\n" "${0##*/}" "$COMMAND" "is not executable" >&2
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exit 1
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}
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# Do the mirroring work.
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"$COMMAND" "$@" >"$LOGSDIR/$LOGFILE" 2>&1
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ERR="$?"
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# Tell the sysadmin what went on.
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if (( "$ERR" == 0 )); then
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# Only email a mirroring report if it's not a Slackware tree only hourly run.
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# The size of the log file determines if it gets emailed.
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(( $(stat --printf="%s" "$LOGSDIR/$LOGFILE") > MIN_LOGFILE_SIZE )) && {
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if [[ -n "${EMAIL_TO[*]}" ]]; then
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mailx "${MAILX_ARGS[@]}" -S "from='$EMAIL_FROM'" -s "Mirroring report" "${EMAIL_TO[@]}" <<-EOF 2>/dev/null || \
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{ printf "%s: %s\\n" "${0##*/}" "mailx command failed" >&2; RET=1; }
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Exit code: $ERR
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Logfile: $LOGSDIR/$LOGFILE.gz
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Output:
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$(< "$LOGSDIR/$LOGFILE")
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EOF
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else
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printf "%s: %s\\n" "${0##*/}" "no recipient configured for mail delivery" >&2
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RET=1
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fi
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}
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else
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# Mirroring failed, tell the admin.
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[[ -x "/opt/bin/pushover" ]] && CONFIG_FILE="mirroring" /opt/bin/pushover -T "Mirroring" -p '-1' -m "Mirroring failed"
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if [[ -n "${EMAIL_TO[*]}" ]]; then
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mailx "${MAILX_ARGS[@]}" -S "from='$EMAIL_FROM'" -s "Mirroring failure" "${EMAIL_TO[@]}" <<-EOF 2>/dev/null || \
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{ printf "%s: %s\\n" "${0##*/}" "mailx command failed" >&2; RET=1; }
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Exit code: $ERR
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Logfile: $LOGSDIR/$LOGFILE.gz
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Output:
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$(< "$LOGSDIR/$LOGFILE")
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EOF
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else
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printf "%s: %s\\n" "${0##*/}" "no recipient configured for mail delivery" >&2
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RET=1
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fi
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fi
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# Compress the log to save some space.
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gzip -9 "$LOGSDIR/$LOGFILE" 2>/dev/null || { printf "%s: %s '%s'\\n" "${0##*/}" "failed to compress" "$LOGSDIR/$LOGFILE" >&2; RET=1; }
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exit "${RET:-0}"
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