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NAME

       fread, fwrite - binary stream input/output

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 location 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 location given by ptr.

       For nonlocking 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

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       pages/.