feof, feof_unlocked—test for end of fileSynopsis
#include <stdio.h> int feof(FILE *fp); #define _BSD_SOURCE #include <stdio.h> int feof_unlocked(FILE *fp);
Description
feof tests whether or not the end of the file identified by fp
has been reached.
feof_unlocked is a non-thread-safe version of feof.
feof_unlocked may only safely be used within a scope
protected by flockfile() (or ftrylockfile()) and funlockfile(). This
function may safely be used in a multi-threaded program if and only
if they are called while the invoking thread owns the (FILE *)
object, as is the case after a successful call to the flockfile() or
ftrylockfile() functions. If threads are disabled, then
feof_unlocked is equivalent to feof.
Returns
feof returns 0 if the end of file has not yet been reached; if
at end of file, the result is nonzero.
Portability
feof is required by ANSI C.
feof_unlocked is a BSD extension also provided by GNU libc.
No supporting OS subroutines are required.