# fread(3)

## NAME

         fread, fwrite - buffered binary input/output

## SYNOPSIS

         #include <sys/types.h>
         #include <stdio.h>

         size_t fread(void *ptr, size_t itemsize, size_t nitems, FILE *stream)
         size_t fwrite(void *ptr, size_t itemsize, size_t nitems, FILE *stream)

## DESCRIPTION

         Fread reads, into a block beginning at ptr, nitems of data of the type of
         *ptr  from  the  named  input  stream.   It  returns  the number of items
         actually read.

         If stream is stdin and the standard output is  line  buffered,  then  any
         partial output line will be flushed before any call to read(2) to satisfy
         the fread.

         Fwrite appends at most nitems of data of the type of  *ptr  beginning  at
         ptr  to the named output stream.  It returns the number of items actually
         written.

## SEE ALSO

         read(2),  write(2),  fopen(3),  getc(3),   putc(3),   gets(3),   puts(3),
         printf(3), scanf(3).

## DIAGNOSTICS

         Fread and fwrite return 0 upon end of file or error.