Add files via upload

backup.sh

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+#!/bin/bash
+
+# This checks if the number of arguments is correct
+# If the number of arguments is incorrect ( $# != 2) print error message and exit
+if [[ $# != 2 ]]
+then
+  echo "backup.sh target_directory_name destination_directory_name"
+  exit
+fi
+
+# This checks if argument 1 and argument 2 are valid directory paths
+if [[ ! -d $1 ]] || [[ ! -d $2 ]]
+then
+  echo "Invalid directory path provided"
+  exit
+fi
+
+# [TASK 1]
+targetDirectory=$1
+destinationDirectory=$2
+
+# [TASK 2]
+echo $targetDirectory
+echo $destinationDirectory
+
+# [TASK 3]
+currentTS=`date +"%S"`
+echo $currentTS
+
+# [TASK 4]
+backupFileName="backup-$currentTS.tar.gz"
+
+# We're going to:
+  # 1: Go into the target directory
+  # 2: Create the backup file
+  # 3: Move the backup file to the destination directory
+
+# To make things easier, we will define some useful variables...
+
+# [TASK 5]
+origAbsPath=`pwd`
+echo $origAbsPath
+
+# [TASK 6]
+cd $destinationDirectory # <-
+destAbsPath=`pwd`
+echo $destAbsPath
+
+# [TASK 7]
+cd $origAbsPath # <-
+cd $targetDirectory # <-
+
+# [TASK 8]
+yesterdayTS=$((24 * 60 * 60 - $currentTS))
+
+declare -a toBackup
+
+for file in $(ls) # [TASK 9]
+do
+  # [TASK 10]
+  if ((`date -r $file +%s` > $yesterdayTS))
+  then
+    # [TASK 11]
+    toBackup+=($file)
+  fi
+done
+
+# [TASK 12]
+tar -czvf $backupFileName ${toBackup[*]}
+
+# [TASK 13]
+mv $backupFileName $destAbsPath
+# Congratulations! You completed the final project for this course!