[Moved to haskell-cafe] On Tue, 19 Mar 2002, David Sankel wrote:
*everytime* about race conditions. (of course using this existFile before creating a temporary file is wrong, but existFile has *many* other applications)
Could someone post an example of the creation of a temporary file where race conditions are important?
IIRC one of the classic issues is --------- myscript wants to create a temporary file called /tmp/storedStuff being half-careful, checks file doesn't exist (*) miniscule delay occurs creates a new file called /tmp/storedStuff --------- creating a new file generally deletes a file of the same without causing any errors since this is often the desired semantics All this is ok until a malicious person manages to get ln -s /home/sankel/reallyImportantUnbackedupData /tmp/storedStuff in the interval denoted by (*) ___cheers,_dave_________________________________________________________ www.cs.bris.ac.uk/~tweed/|`...heat generated by its microprocessors will email:tweed@cs.bris.ac.uk|slope upward exponentially, reaching the power work tel:(0117) 954-5250 |density of a nuclear reactor before 2010'-Intel