.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved .TH "FPUTWC" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" .\" fputwc .SH NAME fputwc \- put a wide-character code on a stream .SH SYNOPSIS .LP \fB#include .br #include .br .sp wint_t fputwc(wchar_t\fP \fIwc\fP\fB, FILE *\fP\fIstream\fP\fB); .br \fP .SH DESCRIPTION .LP The \fIfputwc\fP() function shall write the character corresponding to the wide-character code \fIwc\fP to the output stream pointed to by \fIstream\fP, 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. .LP The \fIst_ctime\fP and \fIst_mtime\fP fields of the file shall be marked for update between the successful execution of \fIfputwc\fP() and the next successful completion of a call to \fIfflush\fP() or \fIfclose\fP() on the same stream or a call to \fIexit\fP() or \fIabort\fP(). .SH RETURN VALUE .LP Upon successful completion, \fIfputwc\fP() shall return \fIwc\fP. Otherwise, it shall return WEOF, the error indicator for the stream shall be set, \ and \fIerrno\fP shall be set to indicate the error. .SH ERRORS .LP The \fIfputwc\fP() function shall fail if either the stream is unbuffered or data in the \fIstream\fP's buffer needs to be written, and: .TP 7 .B EAGAIN The O_NONBLOCK flag is set for the file descriptor underlying \fIstream\fP and the process would be delayed in the write operation. .TP 7 .B EBADF The file descriptor underlying \fIstream\fP is not a valid file descriptor open for writing. .TP 7 .B EFBIG An attempt was made to write to a file that exceeds the maximum file size or the process' file size limit. .TP 7 .B 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. .TP 7 .B EILSEQ The wide-character code \fIwc\fP does not correspond to a valid character. .TP 7 .B EINTR The write operation was terminated due to the receipt of a signal, and no data was transferred. .TP 7 .B 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. .TP 7 .B ENOSPC There was no free space remaining on the device containing the file. .TP 7 .B 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. .sp .LP The \fIfputwc\fP() function may fail if: .TP 7 .B ENOMEM Insufficient storage space is available. .TP 7 .B ENXIO A request was made of a nonexistent device, or the request was outside the capabilities of the device. .sp .LP \fIThe following sections are informative.\fP .SH EXAMPLES .LP None. .SH APPLICATION USAGE .LP None. .SH RATIONALE .LP None. .SH FUTURE DIRECTIONS .LP None. .SH SEE ALSO .LP \fIferror\fP() , \fIfopen\fP() , \fIsetbuf\fP() , \fIulimit\fP() , the Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI\fP, \fI\fP .SH 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 .