crontab_manager

#!/bin/bash

### CRONTAB BACKUP MANAGER ###
#
#It will let you migrate users' crontab using crontab and some input/output redirections :)
#

dir_name=crontabz;

function backup_crontab{
    mkdir $dirname; 
    for user in `cat /etc/cron.allow`
      do crontab -l -u $user > $dirname/cron_$user; 
    done
    tar -cvzf backup.tgz $dirname; 
    exit 0;
}

#Now you should move backup.tgz where needed, then restore

function restore_crontab{
  tar xfv backup.tgz; 
  cd $dirname;
  for file in `ls -m1`
    do echo `basename $file` | sed -s 's/\([a-z]\)*_//' >> temp ; 
  done ;  
  for user in `cat temp` 
    do  cat cron_$user | crontab -u $user - ; 
  done;
  rm -f temp;
  exit 0;
}

function usage{
  echo "Usage: basename $0 { backup | restore }"
}

if [ $# -ne 1 ]
  then
      usage;
      exit 1;
  else
      case $1 in
        backup)
          backup_crontab;
          ;;
        restore)
          restore_crontab;
          ;;
        *)
          usage;
          exit 1;
      esac
fi