bin/trigger

   1 #!/bin/bash
   2
   3 # contab example to backup every configuration:
   4 # */1 * * * * /mnt/wd/ext/backup/bin/trigger -a
   5 #
   6 # additional verbose logging:
   7 # */1 * * * * /mnt/wd/ext/backup/bin/trigger -a -l /var/log/trigger.log
   8 #
   9 # backup of configurations 'foo' and 'bar'
  10 # */1 * * * * /mnt/wd/ext/backup/bin/trigger foo bar
  11
  12 function log {
  13         [ "$dolog" = "1" ] && echo "`date` - $@" >> $log
  14 }
  15
  16 mode=single
  17 confs=""
  18 log=""
  19 for arg in "$@"; do
  20         case $arg in
  21                 -a)
  22                         mode=all
  23                         shift
  24                         ;;
  25                 -l)
  26                         log=$2
  27                         shift 2
  28                         ;;
  29                 *)
  30                         confs="$arg $confs"
  31                         shift
  32                         ;;
  33         esac
  34 done
  35
  36 prog=$0
  37 pdir=`dirname $prog`
  38 cdir=$pdir/../config
  39
  40 dolog=0
  41 if [ ! -z "$log" ]; then
  42         mkdir -p `dirname $log`
  43         [ -d `dirname $log` ] && dolog=1
  44 fi
  45
  46 if [ "$mode" = "all" ]; then
  47         confs=""
  48         for cf in $cdir/*.conf; do
  49                 confs="`basename $cf | sed 's/\.conf$//'` $confs"
  50         done
  51 fi
  52
  53 log triggering backup of $confs ...
  54 for conf in $confs; do
  55         if [ -f $cdir/${conf}.conf ]; then
  56                 rp=`ps -ef | grep "[c]onfig/${conf}\.conf"`
  57                 if [ -z "$rp" ]; then
  58                         cmd="$pdir/backup $cdir/${conf}.conf"
  59                         log started backup of $conf ...
  60                         nohup $cmd &>/dev/null &
  61                 else
  62                         log backup of $conf in progress ...
  63                 fi
  64         else
  65                 log no configuration found for $conf, doing nothing ...
  66         fi
  67 done
  68 log triggering completed, terminating ...
  69