SYNOPSIS
       #include <stdio.h>

       size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);

       size_t fwrite(const void *ptr, size_t size, size_t nmemb,
                     FILE *stream);

DESCRIPTION
       The  function  fread()  reads  nmemb  elements of data, each size bytes
       long, from the stream pointed to by stream, storing them at  the  loca-
       tion given by ptr.

       The  function  fwrite()  writes nmemb elements of data, each size bytes
       long, to the stream pointed to by stream, obtaining them from the loca-
       tion given by ptr.

       for non-locking counterparts, see unlocked_stdio(3).

RETURN VALUE
       fread()  and  fwrite()  return the number of items successfully read or
       written (i.e., not the number of characters).  If an error  occurs,  or
       the  end-of-file is reached, the return value is a short item count (or
       zero).

       fread() does not distinguish between end-of-file and error, and callers
       must use feof(3) and ferror(3) to determine which occurred.

CONFORMING TO
       C89, POSIX.1-2001.

SEE ALSO
       read(2), write(2), feof(3), ferror(3), unlocked_stdio(3)

COLOPHON
       This  page  is  part of release 3.23 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.