FPUTWC(3P)                                          POSIX Programmer's Manual                                         FPUTWC(3P)



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (con-
       sult the corresponding Linux manual page for details of Linux behavior), or the  interface  may  not  be  implemented  on
       Linux.

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,  Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                    FPUTWC(3P)