Solved

Volume locking

Posted on 1997-03-04
1
1,094 Views
Last Modified: 2013-12-26
How is it possible to lock/unlock a volume (Harddisk)? It is not possible with the RedEdit "Get File/Folder Info". Is there a command in C to lock/unlock a volume, or to safe files on a locked volume?
0
Comment
Question by:MacJon
1 Comment
 
LVL 4

Accepted Solution

by:
Alex Curylo earned 50 total points
ID: 1291385
You use PBSetVInfo(). Of course, that only works if it's a software lock, there's obviously nothing code can do about a hardware lock (like the tab on a floppy).

Here's code which is untested but I imagine should work:

OSErr      VolLock(ConstStr255Param pathname, short vRefNum, bool lockIt)
{
      HParamBlockRec pb;
      OSErr error;

      error = GetVolumeInfoNoName(pathname,vRefNum, &pb);
      if ( error == noErr )
      {
            if ( (pb.volumeParam.ioVAtrb & 0x0080) != 0 )
            {
                  error = wPrErr;            /* volume locked by hardware */
            }
            else
  {
     bool swLocked = ( (pb.volumeParam.ioVAtrb & 0x8000) != 0 );
     if (swLocked != lockIt)
     {
        pb.volumeParam.ioVAtrb ^= 0x8000;
        error = PBSetVInfoSync(&pb);
     }
   }
 }
      
      return ( error );
}

GetVolumeInfoNoName() is part of the fine, fine MoreFiles source, available from

<ftp://members.aol.com/JumpLong/MoreFiles_1.4.6.sea.hqx


0

Featured Post

Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Folder Comparison 12 54
Generic progress indicator 6 117
fix34  challenge 9 123
Authenticate using sesu from script 7 30
Introduction: Displaying information on the statusbar.   Continuing from the third article about sudoku.   Open the project in visual studio. Status bar – let’s display the timestamp there.  We need to get the timestamp from the document s…
If you use Adobe Reader X it is possible you can't open OLE PDF documents in the standard. The reason is the 'save box mode' in adobe reader X. Many people think the protected Mode of adobe reader x is only to stop the write access. But this fe…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question