From 0d77f4ab8aafaac27c12a17fe9c02235f327247c Mon Sep 17 00:00:00 2001
From: Matthew Saunders Brown <msb@stackaas.com>
Date: Sat, 23 Jan 2021 13:14:09 -0800
Subject: [PATCH] expanded functionality for listing backups

---
 bashup-list-backups.sh | 92 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 90 insertions(+), 2 deletions(-)

diff --git a/bashup-list-backups.sh b/bashup-list-backups.sh
index 1391ef9..6a018f0 100755
--- a/bashup-list-backups.sh
+++ b/bashup-list-backups.sh
@@ -6,12 +6,59 @@
 
 # backups are stored here
 backup_storage_dir='/mnt/backups';
+# directories that are backed up as part of files
+backup_dirs=('/etc' '/home' '/srv' '/root' '/usr/local' '/var/www');
 
 # check for local config, which can be used to override any of the above
 if [[ -f /usr/local/etc/bashup.cnf ]]; then
   source /usr/local/etc/bashup.cnf
 fi
 
+help()
+{
+  thisfilename=$(basename -- "$0")
+  echo "Bashup - A set of bash scripts for managing backups."
+  echo "https://git.stack-source.com/msb/bashup"
+  echo "MIT License Copyright (c) 2021 Matthew Saunders Brown"
+  echo ""
+  echo "List backups that have been taken and are available for doing restores."
+  echo ""
+  echo "Usage: $thisfilename [-b BACKUPDATE] [-c CATEGORY]"
+  echo ""
+  echo "  -b BACKUPDATE Backup date/archive to list."
+  echo "  -c CATEGORY   Category of backup to verify/list."
+  echo "  -h            Print this help."
+  echo "                If no options are specified a list of backup (dates)"
+  echo "                will be displayed. If only the -b option is used then"
+  echo "                a list of available categories (directories) will be"
+  echo "                displayed. If both -b & -c options are specified then"
+  echo "                the specific backups (files/directories, databases,"
+  echo "                dns zones) available for restoring will be displayed."
+  exit
+}
+
+# set any options that were passed
+while getopts "b:c:h" opt; do
+  case "${opt}" in
+    h )
+      help
+      exit;;
+    b )
+      backup=${OPTARG}
+      ;;
+    c )
+      category=${OPTARG}
+      ;;
+    \? )
+      echo "Invalid option: $OPTARG" 1>&2
+      exit 1;;
+    : )
+      echo "Invalid option: $OPTARG requires an argument" 1>&2
+      exit 1;;
+  esac
+done
+
+
 if [ ! -d $backup_storage_dir ]; then
   echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
   exit 1
@@ -34,8 +81,49 @@ if [ $? -eq 0 ]; then
   fi
 fi
 
-# output list of backups (dates)
-ls -1 $backup_storage_dir | grep -v lost+found
+if [ ! -z "$backup" ]; then
+  if [ -d "$backup_storage_dir/$backup" ]; then
+    if [ ! -z "$category" ]; then
+      if [ -d "$backup_storage_dir/$backup/$category" ]; then
+        if [ "$category" == "files" ]; then
+          # check for a list available backup_dirs
+          for dir in "${backup_dirs[@]}"; do
+            if [ -d $backup_storage_dir/$backup/files$dir ]; then
+              echo "$dir"
+            fi
+          done
+        elif [ "$category" == "mysql" ]; then
+          # list databases that have dumps available for restoring
+          existing_dumps=($(ls $backup_storage_dir/$backup/mysql))
+          for existing_dump in "${existing_dumps[@]}"; do
+            echo "$(basename $existing_dump .sql.gz)"
+          done
+        elif [ "$category" == "pdns" ]; then
+          # list zones available for restoring
+          existing_zones=($(ls $backup_storage_dir/$backup/pdns))
+          for existing_zone in "${existing_zones[@]}"; do
+            echo "$(basename $existing_zone .zone)"
+          done
+        else
+          # unexpected category, just list contents of dir
+          ls -1 $backup_storage_dir/$backup/$category
+        fi
+      else
+        echo "ERROR: Backup $backup_storage_dir/$backup/$category does not exist."
+        exit 1
+      fi
+    else
+      # list backup dirs (categories) available for restore
+      ls -1 $backup_storage_dir/$backup
+    fi
+  else
+    echo "ERROR: Backup dir for $backup does not exist."
+    exit 1
+  fi
+else
+  # output list of backups (dates)
+  ls -1 $backup_storage_dir | grep -v lost+found
+fi
 
 # check if backup_storage_dir is mounted and unmount if so
 grep -qs " $backup_storage_dir " /proc/mounts