bundles/backup-client: rework backup generation

bundles/backup-client/files/check_backup_last_run

@@ -1,42 +1,28 @@
-#!/usr/bin/env python3
+#!/bin/bash
 
-from os.path import getmtime, isfile
-from sys import exit
-from time import time
+statusfile="/var/tmp/backup.monitoring"
 
-statusfile = '/var/tmp/backup.monitoring'
-if not isfile(statusfile):
-    print('Status file not found')
-    exit(3)
+if [[ ! -r "$statusfile" ]]
+then
+    echo "cannot read $statusfile"
+    exit 3
+fi
 
-mtime = getmtime(statusfile)
-now = time()
+. "$statusfile"
 
-if now-mtime > 60*60*24*2:
-    print('Status file is older than 2 days!')
-    exit(3)
+if [[ -z "$msg" ]] || [[ -z "$status" ]] || [[ -z "$timestamp" ]]
+then
+    echo "status file is corrupt, cannot read status"
+    exit 3
+fi
 
-with open(statusfile, 'r') as f:
-    status = f.read().splitlines()
+two_days_ago=$(($(date +%s) - 86400*2))
 
-exitcode = status[0].strip()
+if [[ $timestamp -lt $two_days_ago ]]
+then
+    echo "last saved status is older than two days"
+    exit 2
+fi
 
-if exitcode == 'ok':
-    print('OK')
-    exit(0)
-elif exitcode == 'rsync_error':
-    print('rsync produced some errors, exit codes were:')
-    for line in status[1:]:
-        print(line)
-    exit(2)
-elif exitcode == 'hook':
-    print('run-parts /etc/backup-pre-hook.d failed with exit code {}'.format(status[1]))
-    exit(2)
-elif exitcode == 'abort_no_key':
-    print('no ssh key found in /etc/backup.priv!')
-    exit(1)
-else:
-    # garbage in file
-    for line in status:
-        print(line)
-    exit(3)
+echo "$msg"
+exit "$status"