<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.2900.3020" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV>Hi David Gurvich,</DIV> <DIV>Thanks for responding. Working with copies is what I do. Saving I do by renaming: (rename-file-or-directory result-path original-path #t), which seems rather atomic to me. If the rename fails I have a backup and communicate this one to the user. There is a backup of the original file too, of course. Nevertheless, in MzScheme I cannot open a file that is open in MsWord, while with MsWord I can open a file while it open in an MzScheme program. MsWord realy locks its open files from being write-accessed by other applications. This would be rather convenient. But I cannot figure out how MsWord does this locking.</DIV> <DIV>Greetings, Jos Koot </DIV> <DIV> </DIV> <DIV> </DIV> <DIV>----- Original Message ----- </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=david.gurvich@verizon.net href="mailto:david.gurvich@verizon.net">David Gurvich</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=plt-scheme@list.cs.brown.edu href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, December 19, 2006 6:43 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [plt-scheme] file lock</DIV> <DIV><BR></DIV>Different file access modes are determined by the underlying OS.  MSWord <BR>actually works on copies of the file.  Emacs and vim both work on copies of <BR>the file and save different versions, with names like file~ or #file#, if <BR>multiple instances are being used or the program halts before saving.<BR>On Tuesday 19 December 2006 10:24, jos koot wrote:<BR>> Hi,<BR>> Is it possible to have PLT-scheme lock a file such as to prevent<BR>> simultaneous access from different stand allone programs? I looked around<BR>> in the docs, but could not find any related topic. I am sure it is possible<BR>> somehow, for MSWord can. Greetings, Jos Koot<BR>><BR>> I use version full-369.1-bin-i386-win32.exe on Winsows XP home.<BR><BR>-- <BR>*--*--*--*--*--*--*--*--*--*--*--*<BR>KMail on Gentoo/PPC<BR>_________________________________________________<BR>  For list-related administrative tasks:<BR>  <A href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme">http://list.cs.brown.edu/mailman/listinfo/plt-scheme</A><BR></BLOCKQUOTE></BODY></HTML>