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FreeBSD 11.0 - man page for fread (freebsd section 3)

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FREAD(3) 			   BSD Library Functions Manual 			   FREAD(3) 

NAME
     fread, fwrite -- binary stream input/output

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <stdio.h>

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

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

DESCRIPTION
     The function fread() reads nmemb objects, each size bytes long, from the stream pointed to
     by stream, storing them at the location given by ptr.

     The function fwrite() writes nmemb objects, each size bytes long, to the stream pointed to
     by stream, obtaining them from the location given by ptr.

RETURN VALUES
     The functions fread() and fwrite() advance the file position indicator for the stream by the
     number of bytes read or written.  They return the number of objects read or written.  If an
     error occurs, or the end-of-file is reached, the return value is a short object count (or
     zero).

     The function fread() does not distinguish between end-of-file and error, and callers must
     use   feof(3)  and   ferror(3)  to determine which occurred.  The function fwrite() returns a
     value less than nmemb only if a write error has occurred.

SEE ALSO
       read(2) ,   write(2) 

STANDARDS
     The functions fread() and fwrite() conform to ISO/IEC 9899:1990 (``ISO C90'').

BSD					  March 8, 1994 				      BSD
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