NAME

       fputwc - put a wide-character code on a stream

SYNOPSIS

       #include <stdio.h>
       #include <wchar.h>

       wint_t fputwc(wchar_t wc, FILE *stream);

DESCRIPTION

       The fputwc() function shall write the character corresponding to the wide-character code wc to the output
       stream  pointed to by stream, at the position indicated by the associated file-position indicator for the
       stream (if defined), and advances the indicator appropriately. If the  file  cannot  support  positioning
       requests,  or  if the stream was opened with append mode, the character is appended to the output stream.
       If an error occurs while writing the character, the shift  state  of  the  output  file  is  left  in  an
       undefined state.

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

RETURN VALUE

       Upon  successful  completion,  fputwc()  shall  return  wc.   Otherwise,  it shall return WEOF, the error
       indicator for the stream shall be set,    and errno shall be set to indicate the error.

ERRORS

       The fputwc() function shall fail if either the stream is unbuffered or data in the stream's buffer  needs
       to be written, and:

       EAGAIN The  O_NONBLOCK  flag  is  set  for the file descriptor underlying stream and the process would be
              delayed in the write operation.

       EBADF  The file descriptor underlying stream is not a valid file descriptor open for writing.

       EFBIG  An attempt was made to write to a file that exceeds the maximum file size  or  the  process'  file
              size limit.

       EFBIG  The  file  is  a  regular  file  and  an attempt was made to write at or beyond the offset maximum
              associated with the corresponding stream.

       EILSEQ The wide-character code wc does not correspond to a valid character.

       EINTR  The write operation was terminated due to the receipt of a signal, and no data was transferred.

       EIO    A physical I/O error has occurred, or the process is  a  member  of  a  background  process  group
              attempting  to  write  to its controlling terminal, TOSTOP is set, the process is neither ignoring
              nor blocking SIGTTOU, and the process group of the process is orphaned.  This error  may  also  be
              returned under implementation-defined conditions.

       ENOSPC There was no free space remaining on the device containing the file.

       EPIPE  An  attempt  is  made  to  write  to a pipe or FIFO that is not open for reading by any process. A
              SIGPIPE signal shall also be sent to the thread.

       The fputwc() function may fail if:

       ENOMEM Insufficient storage space is available.

       ENXIO  A request was made of a nonexistent device, or the request was outside  the  capabilities  of  the
              device.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       ferror()  ,  fopen()  ,  setbuf()  ,  ulimit()  ,  the  Base  Definitions volume of IEEE Std 1003.1-2001,
       <stdio.h>, <wchar.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base
       Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
       Inc  and  The  Open Group. In the event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                                   2003                                             FPUTWC(P)