From 000f49c33c736f56bf5b9a0d6aedca74e0ae72dc Mon Sep 17 00:00:00 2001
From: David Runge <dave@sleepmap.de>
Date: Mon, 26 Oct 2015 22:37:11 +0100
Subject: bin/crypted-backups: Distinguishing between checking for folder's
 existence and its additional creation upon non-existence. Adding message on
 empty subfolders when doing recursive backup. Adding check for configuration
 file.

---
 bin/crypted-backups | 45 ++++++++++++++++++++++++++++++++++++---------
 1 file changed, 36 insertions(+), 9 deletions(-)

diff --git a/bin/crypted-backups b/bin/crypted-backups
index e2dc887..5de0b7c 100755
--- a/bin/crypted-backups
+++ b/bin/crypted-backups
@@ -2,7 +2,12 @@
 set -euo pipefail
 IFS=$'\n\t'
 
-. /etc/crypted-backups
+if [ -r /etc/crypted-backups ]; then
+  . /etc/crypted-backups
+else
+  echo "Configuration file (/etc/crypted-backups) not readable! Aborting!"
+  exit 1
+fi
 user_mode=""
 source_mode=""
 verbose=''
@@ -73,6 +78,16 @@ function check_database_settings () {
 }
 
 function check_directory_exists () {
+  local destination=$1
+  if [ ! -d $destination ]; then
+    echo "Directory \"$destination\" does not exist!"
+    return 1
+  else
+    return 0
+  fi
+}
+
+function check_directory_exists_and_autocreate () {
   local destination=$1
   if [ ! -d $destination ]; then
     echo "Directory \"$destination\" does not exist yet. Creating..."
@@ -111,14 +126,15 @@ function check_directory_owner_user() {
 
 function check_user_directory () {
   local directory=$1
-  check_directory_exists $directory
+  echo "Checking directory \"$directory\"."
+  check_directory_exists_and_autocreate $directory
   check_directory_writable_user $directory
   return 0
 }
 
 function check_root_directory () {
   local directory=$1
-  check_directory_exists $directory
+  check_directory_exists_and_autocreate $directory
   check_directory_permission_root $directory
   return 0
 }
@@ -167,12 +183,21 @@ function compress_to_tmp_file () {
 function encrypt_tmp_file () {
   local tmp_file=$1
   local destination_file=$2
+  local encrypt_return=-1
   echo "Encrypting $tmp_file to $destination_file."
-  #TODO: Failover for still deleting $tmp_file, if encryption fails
+  set +eu
   gpg -e \
     -r "$gpg_public_key" \
     -o "$destination_file" \
     "$tmp_file"
+  encrypt_return=$?
+  set -eu
+  if [ $encrypt_return -gt 0 ];then
+    echo "GnuPG encryption returns with: $encrypt_return"
+    echo "Removing $tmp_file."
+    rm -f "$tmp_file"
+    return 1
+  fi
   echo "Removing $tmp_file."
   rm -f "$tmp_file"
   return 0
@@ -190,7 +215,6 @@ function backup_single_directory () {
   notification_source_to_destination "$source_parent_directory$source_directory_basename" $destination_file
   echo "Going to $source_directory_basename's parent directory: $source_parent_directory."
   cd $source_parent_directory
-  #TODO: check if directory, not for existence?
   check_directory_exists $source_directory
   "check_"$user_mode"_directory" $tmp_directory
   "check_"$user_mode"_directory" $destination_directory
@@ -202,14 +226,17 @@ function backup_multiple_directories () {
   local source_directory=$(sanitize_pathname $1)
   local destination_directory=$(sanitize_pathname $2)
   local layered=0
+  local sub_count=0
   if [ ${#@} -gt 2 ]; then
     layered=$3
-    echo "Multi-layered"
+    echo "Recursive backup (depth=1) of \"$source_directory\"."
   fi
+  check_directory_exists $source_directory
   "check_"$user_mode"_directory" $destination_directory
   for sub_directory in $source_directory*
   do
     if [ -d $sub_directory ];then
+      sub_count=$((sub_count+1))
       "check_"$user_mode"_directory" $sub_directory
       if [ $layered -eq 1 ];then
         backup_multiple_directories $sub_directory $destination_directory$(get_basename_directory $sub_directory)
@@ -218,7 +245,9 @@ function backup_multiple_directories () {
       fi
     fi
   done
-
+  if [ $sub_count -eq 0 ]; then
+    echo "There are actually no folders to backup in \"$source_directory\". Please check the configuration file!"
+  fi
 }
 
 function dump_database () {
@@ -292,11 +321,9 @@ function print_help () {
   exit 0
 }
 
-#TODO: Add function to delete compressed data in working directory (also after fail)
 #TODO: Add function to cleanup backups
 #TODO: Add function to mirror backups
 #TODO: Add function to automatically add key to keyring, if not found
-#TODO: Create logic to distinguish between different backups
 #TODO: Add verbose flag
 
 
-- 
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