Update the mirror-wrapper script.

mirror-wrapper

@@ -1,6 +1,6 @@
 #!/bin/bash
-# Version: 0.1.0
+# Version: 0.1.1
-# Copyright (c) 2023:
+# Copyright (c) 2023-2026:
 #   Darren 'Tadgy' Austin <darren (at) afterdark.org.uk>
 # Licensed under the terms of the GNU General Public License version 3.
 #
@@ -10,7 +10,25 @@
 COMMAND="/opt/bin/mirror"
 LOGSDIR="/var/log/duplication/mirroring/$(printf "%(%Y/%m)T")"
 LOGFILE="$(printf "%(%Y%m%d-%H%M%S)T")-$$"
-MIN_LOGFILE_SIZE="550"
+MIN_LOGFILE_SIZE="550"		# Used to prevent unnecessary emails - only messages over this size are sent.
+# Where from/to to send emails.  Comment for no emailing.
+EMAIL_FROM="\"Server: ${HOSTNAME%%.*}\" <noreply@slackware.uk.net>"
+EMAIL_TO=("Systems' Administrator <sysadmin@slackware.uk>")
+
+# Functions
+notify() {
+  if [[ -n "$EMAIL_FROM" ]] && (( "${#EMAIL_TO[@]}" != 0 )); then
+    printf "%s: %s\\n%s: %s\\n%s:\\n%s\\n" "Exit code" "$ERR" "Logfile" "$LOGSDIR/$LOGFILE.xz" "Output" "$(<"$LOGSDIR/$LOGFILE")" | mail -r "$EMAIL_FROM" -s "Mirroring $1" "${EMAIL_TO[@]}" >/dev/null 2>&1 || {
+      printf "%s: %s\\n" "${0##*/}" "mail command failed" >&2
+      return 1
+    }
+  else
+    printf "%s: %s\\n" "${0##*/}" "no sender and/or recipient configured for mail delivery" >&2
+    return 1
+  fi
+
+  return 0
+}
 
 # Only allow one copy of the script to run at any time.
 # shellcheck disable=SC2154
@@ -27,21 +45,19 @@ if [[ "$FLOCK" != "$0" ]]; then
   fi
 fi
 
-# Source the mail configuration.
+# Logs are only for root.
-source /etc/mail.conf "backups" 2>/dev/null || {
+umask 027
-  printf "%s: %s\\n" "${0##*/}" "Failed to source /etc/mail.conf" >&2
-  exit 1
-}
 
 # Make sure the logs directory exists.
-mkdir -p "$LOGSDIR" 2>/dev/null || {
+# shellcheck disable=SC2174
-  printf "%s: %s\\n" "${0##*/}" "Failed to create logs directory" >&2
+mkdir -p -m 750 "$LOGSDIR" 2>/dev/null || {
+  printf "%s: %s\\n" "${0##*/}" "Failed to create logs directory '$LOGSDIR'" >&2
   exit 1
 }
 
 # Make sure the command to do the work is runnable.
 [[ ! -x "$COMMAND" ]] && {
-  printf "%s: '%s' %s\\n" "${0##*/}" "$COMMAND" "is not executable" >&2
+  printf "%s: %s\\n" "${0##*/}" "'$COMMAND' is not executable" >&2
   exit 1
 }
 
@@ -49,42 +65,17 @@ mkdir -p "$LOGSDIR" 2>/dev/null || {
 "$COMMAND" "$@" >"$LOGSDIR/$LOGFILE" 2>&1
 ERR="$?"
 
+# Compress the log to save some space.
+xz -9 "$LOGSDIR/$LOGFILE" 2>/dev/null || printf "%s: %s\\n" "${0##*/}" "failed to compress '$LOGSDIR/$LOGFILE'" >&2
+
 # Tell the sysadmin what went on.
 if (( "$ERR" == 0 )); then
-  # Only email a mirroring report if it's not a Slackware tree only hourly run.
+  # Only email a mirroring report if it's not the hourly Slackware tree only run.
   # The size of the log file determines if it gets emailed.
-  (( $(stat --printf="%s" "$LOGSDIR/$LOGFILE") > MIN_LOGFILE_SIZE )) && {
+  (( $(stat --printf="%s" "$LOGSDIR/$LOGFILE") > MIN_LOGFILE_SIZE )) && notify "report"
-    if [[ -n "${EMAIL_TO[*]}" ]]; then
+  exit "$?"
-      mailx "${MAILX_ARGS[@]}" -S "from=$EMAIL_FROM" -s "Mirroring report" "${EMAIL_TO[@]}" <<-EOF 2>/dev/null || \
-          { printf "%s: %s\\n" "${0##*/}" "mailx command failed" >&2; RET=1; }
-		Exit code: $ERR
-		Logfile: $LOGSDIR/$LOGFILE.gz
-		Output:
-		$(< "$LOGSDIR/$LOGFILE")
-		EOF
-    else
-      printf "%s: %s\\n" "${0##*/}" "no recipient configured for mail delivery" >&2
-      RET=1
-    fi
-  }
 else
   # Mirroring failed, tell the admin.
-  [[ -x /opt/bin/pushover-client ]] && /opt/bin/pushover-client "mirroring" -p -1 -m "Mirroring failure"
+  notify "failure" || [[ -x /opt/bin/pushover-client ]] && /opt/bin/pushover-client "mirroring" -p -1 -s "Mirroring failure" -m "Check log in email"
-  if [[ -n "${EMAIL_TO[*]}" ]]; then
+  exit 1
-    mailx "${MAILX_ARGS[@]}" -S "from=$EMAIL_FROM" -s "Mirroring failure" "${EMAIL_TO[@]}" <<-EOF 2>/dev/null || \
-        { printf "%s: %s\\n" "${0##*/}" "mailx command failed" >&2; RET=1; }
-		Exit code: $ERR
-		Logfile: $LOGSDIR/$LOGFILE.gz
-		Output:
-		$(< "$LOGSDIR/$LOGFILE")
-		EOF
-  else
-    printf "%s: %s\\n" "${0##*/}" "no recipient configured for mail delivery" >&2
-    RET=1
-  fi
 fi
-
-# Compress the log to save some space.
-gzip -9 "$LOGSDIR/$LOGFILE" 2>/dev/null || { printf "%s: %s '%s'\\n" "${0##*/}" "failed to compress" "$LOGSDIR/$LOGFILE" >&2; RET=1; }
-
-exit "${RET:-0}"