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
       _F_r_e_a_d  reads, into a block beginning at _p_t_r, _n_i_t_e_m_s of data of the type
       of _*_p_t_r from the named input _s_t_r_e_a_m.  It returns the  number  of  items
       actually read.

       If  _s_t_r_e_a_m  is stdin and the standard output is line buffered, then any
       partial output line will be flushed before any call to _r_e_a_d(2) to  sat‐
       isfy the _f_r_e_a_d.

       _F_w_r_i_t_e  appends at most _n_i_t_e_m_s of data of the type of _*_p_t_r beginning at
       _p_t_r to the named output _s_t_r_e_a_m.  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
       _F_r_e_a_d and _f_w_r_i_t_e return 0 upon end of file or error.



4th Berkeley Distribution        May 15, 1985                        FREAD(3S)