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 .