Subj : Re: How to aviod a process from deleting an opened file
To   : comp.os.linux
From : robertharvey
Date : Thu Jul 29 2004 06:43 pm

vanjina_murthy@rediffmail.com (murthy) wrote in message news:<1d1f73fd.0407282032.1cc3e6dd@posting.google.com>...
> I am developing an application using C 
....
> What i want is that if a file is opened by one process either for
> reading/writing it should not be deleted or even can be opened by
> other process(i.e open should fail). Anyone knows, how it can
> achieved.

err..  File locking?

man flock
man fcntl

man lockf, for the more standardised approach

Read up on mandatory locking - mandatory.txt should be on your hard
disk.

err..  This is one of the oldest bits of Unix.  I can remmber having
to delete lock files from /var/lock after processes crashed.  I'm not
sure, but I reckon file locking is now handled more elegantly,
although things like serial ports are certainly still locked in
/var/lock.

.