fwrite(3C)						   Standard C Library Functions 						fwrite(3C)

NAME

       fwrite - binary output

SYNOPSIS

       #include <stdio.h>

       size_t fwrite(const void *ptr, size_t size, size_t nitems, FILE *stream);

DESCRIPTION

       The  fwrite()  function	writes,  from  the  array  pointed to by ptr, up to nitems elements whose size is specified by size, to the stream
       pointed to by stream. For each object, size calls are made to the fputc(3C) function, taking  the  values  (in  order)  from  an  array	of
       unsigned  char  exactly	overlaying  the object. The file-position indicator for the stream (if defined) is advanced by the number of bytes
       successfully written. If an error occurs, the resulting value of the file-position indicator for the stream is unspecified.

       The st_ctime and st_mtime fields of the file will be marked for update between the successful execution of fwrite() and the next successful
       completion of a call to fflush(3C) or fclose(3C) on the same stream or a call to exit(2) or abort(3C).

RETURN VALUES

       The fwrite() function returns the number of elements successfully written, which might be less than nitems if a write error is encountered.
       If size or nitems is 0, fwrite() returns 0 and the state of the stream remains unchanged. Otherwise, if a write	error  occurs,	the  error
       indicator for the stream is set and errno is set to indicate the error.

ERRORS

       Refer to fputc(3C).

USAGE

       Because	of  possible differences in element length and byte ordering, files written using fwrite() are application-dependent, and possibly
       cannot be read using fread(3C) by a different application or by the same application on a different processor.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       write(2), fclose(3C), ferror(3C), fopen(3C), fread(3C), getc(3C), gets(3C), printf(3C), putc(3C), puts(3C), attributes(5), standards(5)

SunOS 5.10							    24 Jul 2002 							fwrite(3C)