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.

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(3S), getc(3S), putc(3S), gets(3S), puts(3S), printf(3S), scanf(3S)

DIAGNOSTICS

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

4th Berkeley Distribution  —  Revision 1.2 of 19/10/88