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  1. #!/bin/bash
  2.  
  3. # Create BACKUP file in backup destination and add to cron
  4.  
  5. # Error codes
  6. # 1 - Unknown error
  7. # 1xx - fs problems
  8. # 2xx - backup failed
  9.  
  10. ERR_100="Error $1: Backup not mounted"
  11. ERR_110="Error $1: Target directories not available"
  12. ERR_200="Error $1: Backup failed"
  13.  
  14. targets_to_backup="/home/work/scripts/
  15. /home/work/something/
  16. /home/work/notes/
  17. /home/work/somethingelse/
  18. "
  19.  
  20. backup_destination="/mnt/backup/mybox/"
  21.  
  22. function backup_not_mounted
  23. {
  24.    # Is backup mounted?
  25.    if [[ ! -f "$backup_destination/BACKUP" ]]; then
  26.       backup_not_mounted_return=100
  27.    else
  28.       backup_not_mounted_return=0
  29.    fi
  30. }
  31.  
  32. function target_not_available
  33. {
  34.    SAVEIFS=$IFS
  35.    IFS=$(echo -en "\n\b")
  36.    for target in $targets_to_backup
  37.    do
  38.       if [[ ! -d "$target" ]]; then
  39.          target_not_available_return=110
  40.       else
  41.          target_not_available_return=0
  42.       fi
  43.    done
  44.    IFS=$SAVEIFS
  45. }
  46.  
  47. function exit_error
  48. {
  49.    case "$1" in
  50.    100) echo $ERR_100
  51.       exit $1
  52.       ;;
  53.    110) echo $ERR_110
  54.       exit $1
  55.       ;;
  56.    200) echo $ERR_200
  57.       exit $1
  58.       ;;
  59.    0)
  60.       ;;
  61.    *) echo "Unknown error $1"
  62.       exit 1
  63.       ;;
  64.    esac
  65. }
  66.  
  67. function do_backup
  68. {
  69.    SAVEIFS=$IFS
  70.    IFS=$(echo -en "\n\b")
  71.    for target in $targets_to_backup
  72.    do
  73.       nice -n 19 ionice -c 3 rsync -avz -R "$target" "$backup_destination"
  74.  
  75.       if [[ ! -d "$target" ]]; then
  76.          do_backup_return=200
  77.          break
  78.       else
  79.          do_backup_return=0
  80.       fi
  81.    done
  82.    IFS=$SAVEIFS
  83. }
  84.  
  85. function main
  86. {
  87.    backup_not_mounted
  88.    exit_error $backup_not_mounted_return
  89.  
  90.    target_not_available
  91.    exit_error $target_not_available_return
  92.  
  93.    do_backup
  94.    exit_error $do_backup_return
  95. }
  96.  
  97. # RUN!
  98. main
Runtime error #stdin #stdout 0.03s 5312KB
comments (?)
stdin 
Standard input is empty
stdout 
Error : Backup not mounted
https://ideone.com/rJXq6
language:
Bash (bash 5.0.3)
created:
14 years ago
visibility:
public

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