term% cat index.txt FREAD(3S) FREAD(3S)
NAME
fread, fwrite - buffered binary input/output
SYNOPSIS
#include <stdio.h>
fread(ptr, sizeof(*ptr), nitems, stream)
FILE *stream;
fwrite(ptr, sizeof(*ptr), nitems, stream)
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.
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 actu‐
ally 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.
FREAD(3S)