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From: phillip@cbmvax.cbm.UUCP (Phillip Lindsay CATS)
Newsgroups: comp.sys.amiga
Subject: Re: AmigaDOS locks
Message-ID: <1774@cbmvax.cbmvax.cbm.UUCP>
Date: Mon, 27-Apr-87 16:28:08 EDT
Article-I.D.: cbmvax.1774
Posted: Mon Apr 27 16:28:08 1987
Date-Received: Tue, 28-Apr-87 03:42:51 EDT
References: <798@goanna.oz>
Organization: Commodore Technology, West Chester, PA
Lines: 29

in article <798@goanna.oz>, ajk@goanna.oz (Alan Kent) says:
> Keywords: locking files with amigados
> 
> Please Enlighten me.
> 
> I have been looking through all the manuals I can lay my hands on, but
> nothing seems to help.
> 
> I want to lock a file so that no-one else will touch it while I do
> I/O on the file (reads and possibly writes).
....[crunch] 
> At present, I exclusive Lock() the file and if that works, I quickly
> UnLock() and Open() it.  This is not perfect but its the best I can
> think of. Anyone got any better ideas?
> 

There is new Open() mode offered in the 1.2 release. (Look in the
1.2 "dos.h" header file).

MODE_READWRITE = 1004

file = Open("foo",MODE_READWRITE); /* opens old file with exclusive lock */

-phil
==============================================================================
Phillip (Flip) Lindsay - Commodore Business Machines - Amiga Technical Support
  UUCP: {ihnp4|seismo|caip}!cbmvax!phillip      - Phone: (215) 431-9180
  No warranty is implied or otherwise given in the form of suggestion or 
  example. Any opinions found here are of my making.