4.3BSD - /usr/man/cat3/fread.0

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.

       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  sat‐
       isfy 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  actu‐
       ally 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        May 15, 1985                        FREAD(3S)