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- SoftLock 1.5 User Guide
-
- by David Davies-Payne
- 16th January 1992
-
- © 1990-1992, All Rights Reserved
-
-
- CONTENTS
-
- What is SoftLock?
- Why Lock Disks?
- How To Lock a Disk
- Using Passwords
- Advanced Features
- System 7 Features
- Shareware Details
- Version History
- Warranty
-
-
- WHAT IS SOFTLOCK?
-
- SoftLock is a utility that enables you to write-protect a disk in
- software alone. The software lock is part of the Macintosh™
- operating system, and is analogous to sliding the write-protect
- tab on a floppy disk. SoftLock allows you to lock and unlock disks
- easily. SoftLock can not unlock a disk that is physically locked in
- hardware.
-
- One of the advantages of SoftLock is that hard disks can also be
- locked to prevent changes. An optional password will prevent
- the program from unlocking a disk until the correct password is
- entered.
-
-
- WHY LOCK DISKS?
-
- Locking a disk prevents the disk from being changed in any way.
- No files can be modified or thrown away. If you have a disk that
- you only want to read from but never change, locking the disk
- will ensure that no files are accidentally modified. This has been
- found to be of use in the student teaching area, where disks can be
- handed out as if they were text books, and the teachers can be
- sure the contents will not be accidentally or maliciously altered.
-
- If you are creating a HyperCard™ stack that will run from a
- CD-ROM, locking the hard disk will simulate the read-only environ-
- ment of the CD-ROM drive, and allow you to ensure that the stack
- will run correctly.
-
- If your hard disk is partitioned, one or more partitions can be
- individually locked to preserve their contents. If you have a
- partition reserved for your applications, locking that partition
- should ensure that those applications are never infected by a virus.
- (This can not be guarantied as a virus may one day be written that
- defeats the software lock, but as yet none are known to have this
- capability.)
-
-
- HOW TO LOCK A DISK
-
- The main window (titled SoftLock) has five buttons: Lock, Unlock,
- Eject, Drive, and Disk Info. To lock a disk click the Lock button. To
- unlock a disk click the Unlock button. If a disk is physically locked,
- SoftLock can neither lock or unlock the disk. This will be evident
- as the Lock and Unlock buttons will be dimmed.
-
- Clicking the Drive button will cycle through all the mounted disks.
- If there are less than two disks currently mounted, the Drive button
- will be dimmed. Clicking the Eject button will eject the current disk.
- If the current disk can not be physically ejected, the Eject button
- will be dimmed.
-
- Clicking the Disk Info button will bring up a window giving inform-
- ation about the current disk. The information includes: when the disk
- was created and last modified, the amount of free space on the disk,
- how many times the disk has been written to, and the number of files
- and folders it contains.
-
- All five buttons have keyboard shortcuts associated with them.
- You can lock a disk by pressing the 'L' key, and unlock a disk by
- pressing the 'U' key. Similarly 'E', 'D' and 'I' are shortcuts for the
- Eject, Drive and Disk Info buttons respectively.
-
- When a disk is locked, a lock symbol is drawn next to the disk's
- name. When the disk is software locked the lock symbol is unfilled.
- When the disk is physically locked, the lock symbol is filled.
-
- Some programs, such as the Finder™, also display the lock status
- of disks. To ensure that this information is kept up to date, SoftLock
- forces all other windows to be redrawn whenever a disk is locked or
- unlocked.
-
-
- USING PASSWORDS
-
- Sometimes it may be necessary to prevent an unauthorised person
- from unlocking a disk that has been locked with SoftLock. In order
- to achieve this a password can be installed as the disk is locked.
- When unlocking a disk, SoftLock looks for this password, and if found
- will only unlock the disk if the identical password is entered.
-
- To specify a password choose the 'Set Password…' item from the
- 'Options' menu. You will be asked to enter a password twice. The
- text of the password will not appear on the screen, instead a number
- of dashes will mark the characters as they are typed. Once entered,
- the 'Set Password…' menu item will be checked to inform you that
- the password will be used whenever a disk is locked.
-
- To stop using a password, again choose the 'Set Password…' item,
- clear the hilited text, and click OK. The 'Set Password…' item will
- no longer be checked.
-
- When unlocking a disk that was locked with a password, a dialog
- will appear asking you to enter the password. Type in the password
- exactly as saved (including case) and the disk will be unlocked. As
- before the text of the password will be masked by dashes.
-
- SoftLock can only unlock a disk if the correct password is entered.
- Note that the password encryption formula has changed since the
- program was first released. This version of the program can unlock
- disks locked with a password using previous versions, although the
- reverse may not necessarily be true.
-
- If you do forget the password for a locked disk, your only option is
- to copy the contents to another disk, and erase the locked disk with
- SoftLock or Disk First Aid. See the next section for details.
-
-
- ADVANCED FEATURES
-
- When a disk is locked or unlocked, the windows in all other open
- applications are redrawn to ensure that their information is correct.
- As this process may take time, it can be disabled by toggling the
- 'Always Redraw Windows' item in the 'Options' menu. Note that if
- disabled, the information displayed in the Finder may not be correct.
-
- When locking a disk with a password, a warning appears to ensure
- that you intend the password to be used. This warning can be pre-
- vented from appearing by choosing the 'Disable Warnings' item from
- the 'Options' menu.
-
- If a password is forgotten, your only option is to choose the 'Erase
- Disk…' item from the 'Options' menu. Choosing this option will unlock
- the disk and delete all of its files. Note that you can not erase a disk
- that is physically locked, or the disk used to start up the Macintosh,
- or the disk containing the SoftLock program.
-
-
- SYSTEM 7 FEATURES
-
- SoftLock makes use of a number of system 7 features, principally
- balloon help, and AppleEvents. SoftLock has balloon help for all
- menus, dialogs and controls.
-
- Under system 7 a disk can be locked or unlocked by merely dragg-
- ing the disk icon to the SoftLock icon and releasing. If the disk is
- unlocked it will be locked, if locked it will be unlocked. SoftLock’s
- windows will then be hidden, and the Finder will be brought to the
- front. If the disk is physically locked, a beep will sound.
-
-
- SHAREWARE DETAILS
-
- SoftLock is not free, it is shareware. If you wish to use it, you
- should send US$10 or equivalent to the author at the following
- address. By sending in the money you will encourage further
- improvements to this and other useful programs.
-
- Please send your name, address and shareware fee to:
-
- David Davies-Payne
- 12, Grosvenor Terrace,
- Wadestown,
- Wellington 1
- New Zealand.
-
- In return, I will send you improved versions of the program, as
- they appear. I can be contacted via electronic mail at
- DAVPAYNE@OTAGO.AC.NZ
-
- Your support is greatly appreciated, and I am always open to
- comments and suggestions.
-
-
- VERSION HISTORY
-
- Version 1.5 (16/1/92) automatically updates all other windows.
- Drag and drop capability added. Reduced partition size to 110K.
- Improved documentation.
-
- Version 1.4 (30/10/91) added some System 7.0 features, such
- as help balloons. Help appears under the Balloon menu under System
- 7.0. The password dialog now hides the entered text using dashed
- lines. Windows now appear in the correct places with multiple
- monitors. A warning now appears when locking with a password.
- This warning can be disabled. The ability to unlock a disk without a
- password was added; t his process deletes all files on the disk.
-
- Version 1.3 (24/4/91) used a new method for encrypting the
- password. While 1.3 can unlock disks locked with earlier versions,
- the reverse is not true.
-
- Version 1.2 (23/3/91) added a help window.
-
- Version 1.1 (19/2/91) sported a new interface that was Multi-
- Finder friendly.
-
- Version 1.0 (12/2/91) was the first release version of SoftLock.
-
-
- WARRANTY
-
- The author makes no warranty as to the performance of SoftLock.
- The user accepts the program as it stands. The author will make
- every effort to fix any bugs found in the software but is not
- obligated to do so.
-
- The user is reminded that once a disk is locked with a password,
- that disk can only be unlocked by supplying the correct password.
-
- The author is not liable for any loss of data or profits associated
- with the use of SoftLock. In no event will the author be liable for
- more than the price paid for SoftLock.