RecycleBin Script Restore Post: 302866337

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Top Forums Shell Programming and Scripting RecycleBin Script Restore Post 302866337 by Don Cragun on Monday 21st of October 2013 08:26:06 PM

10-21-2013

Registered User

Quote:

Originally Posted by zinn

Hi there I am making a recycle bin script in linux that consists of three scripts delete, trash and restore.

The problem is with my restore script, it is using a Paths text file to store file locations when it is deleted, so that if the user restores a file out of the trash bin (recyclebin) the restore script will put it in the directory it originally was.. Below is my restore script could anyone possibly tell me a way how to edit the script so if a file is restored it will not overwrite a file if there is a naming conflict. Otherwise the restore script works successfully.

Code:

      #!/bin/sh
      #!/bin/bash
      if [ $1 ]; then
          echo "Restoring File..."
          grep $1 binfiles/binscripts/Paths
          restore=`grep $1 binfiles/binscripts/Paths'
          mv ~/RecycleBin/$1 $restore
          sed -i '$ d' ~/binfiles/binscripts/Paths
      else 
         echo "That files doesn't exist.";
      fi

$1 represents the file, what I am trying to work out if $1 is moved back to its original directory and a file with the same name is already there how can i prompt the user to ask if they wish to overwrite it or not? and Paths is the text file the original directories are stored in. Thanks in advance

There are several things that could go wrong here:

$!path might not do what you want if it doesn't appear at the start of the line in your 1st line of code.
Having the 1st two lines of your script indicate that you want to use two different shells may confuse people trying to figure out what you're trying to do???
What happens if $1 looks like an operator to test?
What happens if $1 doesn't match any line or matches more than one line in binfiles/binscripts/Paths?
What happens if binfiles/binscripts/Paths doesn't exist in the directory where this script is being run? (Note that you reference binfiles/binscripts/Paths twice and ~/binfiles/binscripts/Paths once. Should all three of them refer to ~/binfiles/binscripts/Paths?)
What happens if the file you restore wasn't described by the last line in ~/binfiles/binscripts/Paths?
Are all lines in ~/binfiles/binscripts/Paths just absolute pathnames of the file that is to be restored? What happens if a file is deleted, a new file with the same name is created, and then the new file is also deleted?
What happens if there are any whitespace characters in one or more of your pathnames?

Assuming that none of the above cause you any problems, the following would print an error rather than restore the file if the destination path already exists:

Code:

          if [ ! -e "$restore" ]
          then    mv ~/RecycleBin/"$1" "$restore"
          else    printf "%s: \"%s\" already exists.\n" "$0" "$restore" >&2
                  exit 1
          fi

instead of:

Code:

          mv ~/RecycleBin/$1 $restore

Obviously, you can change the else clause to do whatever you want to prompt for permission to overwrite the existing file, use an alternative name, or whatever you else you decide you want to do.

Don Cragun

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