C Interview Questions and Answers


How can I recover the file name given an open stream?

This problem is, in general, insoluble. Under Unix, for instance, a scan of the
entire disk (perhaps involving special permissions) would theoretically be required,
and would fail if the descriptor were connected to a pipe or referred to a deleted
file (and could give a misleading answer for a file with multiple links). It is
best to remember the names of files yourself as you open them (perhaps with a wrapper
function around fopen).

Posted by:Richards