Sun Microsystems, Inc. gratefully acknowledges The Open Group for
permission to reproduce portions of its copyrighted documentation.
Original documentation from The Open Group can be obtained online at
http://www.opengroup.org/bookstore/.
The Institute of Electrical and Electronics Engineers and The Open
Group, have given us permission to reprint portions of their
documentation.
In the following statement, the phrase ``this text'' refers to portions
of the system documentation.
Portions of this text are reprinted and reproduced in electronic form
in the SunOS Reference Manual, from IEEE Std 1003.1, 2004 Edition,
Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6,
Copyright (C) 2001-2004 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy
between these versions 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.
This notice shall appear on any product containing this material.
The contents of this file are subject to the terms of the
Common Development and Distribution License (the "License").
You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
or http://www.opensolaris.org/os/licensing.
See the License for the specific language governing permissions
and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each
file and include the License file at usr/src/OPENSOLARIS.LICENSE.
If applicable, add the following below this CDDL HEADER, with the
fields enclosed by brackets "[]" replaced with your own identifying
information: Portions Copyright [yyyy] [name of copyright owner]
Copyright (c) 1992, X/Open Company Limited. All Rights Reserved.
Portions Copyright (c) 2002, Sun Microsystems, Inc. All Rights Reserved.
#include <stdio.h> #include <wchar.h> wint_t fputwc(wchar_t wc, FILE*stream);
wint_t putwc(wchar_t wc, FILE*stream);
#include <wchar.h> wint_t putwchar(wchar_t wc);
The fputwc() function writes 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 will be marked for update between the successful execution of fputwc() and the next successful completion of a call to fflush(3C) or fclose(3C) on the same stream or a call to exit(2) or abort(3C).
The putwc() function is equivalent to fputwc(), except that it is implemented as a macro.
The call putwchar(wc) is equivalent to putwc(wc, stdout). The putwchar() routine is implemented as a macro.
Upon successful completion, fputwc(), putwc(), and putwchar() return wc. Otherwise, they return WEOF, the error indicator for the stream is set, and errno is set to indicate the error.
The fputwc(), putwc(), and putwchar() functions will 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.
The file descriptor underlying stream is not a valid file descriptor open for writing.
An attempt was made to write to a file that exceeds the maximum file size or the process's file size limit; or the file is a regular file and an attempt was made to write at or beyond the offset maximum associated with the corresponding stream.
The write operation was terminated due to the receipt of a signal, and no data was transferred.
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.
There was no free space remaining on the device containing the file.
An attempt is made to write to a pipe or FIFO that is not open for reading by any process. A SIGPIPE signal will also be sent to the calling thread.
The fputwc(), putwc(), and putwchar() functions may fail if: ENOMEM
Insufficient storage space is available.
A request was made of a non-existent device, or the request was outside the capabilities of the device.
The wide-character code wc does not correspond to a valid character.
Functions exist for the putwc() and putwchar() macros. To get the function form, the macro name must be undefined (for example, #undef putc).
When the macro form is used, putwc() evaluates the stream argument more than once. In particular, putwc(wc, *f++) does not work sensibly. The fputwc() function should be used instead when evaluating the stream argument has side effects.
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Standard |
| MT-Level MT-Safe |
exit(2), ulimit(2), abort(3C), fclose(3C), ferror(3C), fflush(3C), fopen(3C), setbuf(3C), attributes(5), standards(5)