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[REBOL] Re: Double trouble

From: petr:krenzelok:trz:cz at: 24-Jun-2001 0:52

Hi, I solved the case one month ago. The only thing I found for file locking was tcp server based. I have complete solution for non server based locking. I have the script at my work, so you will have to wait till monday. It works based upon following principle: - you call the function supplied with path to file and file name, e.g. %/C/my-dir/ %my-file.txt. It then tries to get lock on %my-file.sem, on the path given. First thing I do is - I check if %my-file.sem exists. If it does, I try to delete it (because some app could crash and left our semaphore file in "dead" state, placed on hd). If I can't delete the .sem file, I know that someone holds the lock. If I can delete it, I open/new/direct %my-file.sem file. So, in the end - we don't have any mechanism to write-protect file, but we can prevent file from being deleted (if we (or someone else) hold it opened ....) The solution is easy enough to adapt to your conditions ... -pekr-