HPUX fwrite[3s]

 fread(3S)                                                         fread(3S)





 NAME
      fread(), fwrite() - buffered binary input/output to a stream file

 SYNOPSIS
      #include <stdio.h>

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

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

 DESCRIPTION
      fread() copies, into an array pointed to by ptr, nitems items of data
      from the named input stream, where an item of data is a sequence of
      bytes (not necessarily terminated by a null byte) of length size.
      fread() stops appending bytes if an end-of-file or error condition is
      encountered while reading stream, or if nitems items have been read.
      fread() leaves the file pointer in stream, if defined, pointing to the
      byte following the last byte read if there is one.  fread() does not
      change the contents of stream.

      fwrite() appends at most nitems items of data from the array pointed
      to by ptr to the named output stream.  fwrite() stops appending when
      it has appended nitems items of data or if an error condition is
      encountered on stream.  fwrite() does not change the contents of the
      array pointed to by ptr.

      The argument size is typically sizeof(*ptr) where the pseudo-function
      sizeof specifies the length of an item pointed to by ptr.  If ptr
      points to a data type other than char it should be cast into a pointer
      to char.

 SEE ALSO
      read(2), write(2), fopen(3S), getc(3S), gets(3S), printf(3S),
      putc(3S), puts(3S), scanf(3S).

 RETURN VALUE
      fread() and fwrite() return the number of items read or written.  If
      size or nitems is non-positive, no characters are read or written and
      0 is returned by both fread() and fwrite().

 STANDARDS CONFORMANCE
      fread(): AES, SVID2, XPG2, XPG3, XPG4, FIPS 151-2, POSIX.1, ANSI C

      fwrite(): AES, SVID2, XPG2, XPG3, XPG4, FIPS 151-2, POSIX.1, ANSI C










 Hewlett-Packard Company            - 1 -     HP-UX Release 9.0: August 1992