2.9BSD/usr/man/cat2/write.2

WRITE(2)            UNIX Programmer's Manual             WRITE(2)

NAME
     write - write on a file

SYNOPSIS
     write(fildes, buffer, nbytes)
     char *buffer;
     unsigned nbytes;

DESCRIPTION
     A file descriptor is a word returned from a successful _o_p_e_n,
     _c_r_e_a_t, _d_u_p, or _p_i_p_e(2) call.

     _B_u_f_f_e_r is the address of _n_b_y_t_e_s contiguous bytes which are
     written on the output file.  The number of characters actu-
     ally written is returned.  It should be regarded as an error
     if this is not the same as requested.

     Writes which are multiples of 1024 characters long and begin
     on a 1024-byte boundary in the file are more efficient than
     any others.

ERRORS
     _W_r_i_t_e will fail if one or more of the following is true:

     [EBADF]             _F_i_l_d_e_s is not a valid descriptor open
                         for writing.

     [EPIPE]             Ann attempts is made to write to a piipe
                         that is not open for reading by any pro-
                         cess.

     [EFBIG]             An attempt was made to write a file that
                         exceeds the maximum file size.

     [EQUOT]             An attempt was made to write a file that
                         exceeds a quota governing the file.

SEE ALSO
     creat(2), open(2), pipe(2)

ASSEMBLER
     (write = 4.)
     (file descriptor in r0)
     sys write; buffer; nbytes
     (byte count in r0)

Printed 5/22/83                                                 1