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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 dif-
       fer (consult 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 SIGT-
              TOU, and the process group of the process is orphaned.  This error may also be returned under  implemen-
              tation-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, Stan-
       dard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base  Specifica-
       tions  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 Stan-
       dard,  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(3P)