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10 .TH FPUTWC 3C "Nov 1, 2003"
12 fputwc, putwc, putwchar \- put wide-character code on a stream
19 \fBwint_t\fR \fBfputwc\fR(\fBwchar_t\fR \fIwc\fR, \fBFILE*\fR\fIstream\fR);
24 \fBwint_t\fR \fBputwc\fR(\fBwchar_t\fR \fIwc\fR, \fBFILE*\fR\fIstream\fR);
31 \fBwint_t\fR \fBputwchar\fR(\fBwchar_t\fR \fIwc\fR);
37 The \fBfputwc()\fR function writes the character corresponding to the
38 wide-character code \fIwc\fR to the output stream pointed to by \fIstream\fR,
39 at the position indicated by the associated file-position indicator for the
40 stream (if defined), and advances the indicator appropriately. If the file
41 cannot support positioning requests, or if the stream was opened with append
42 mode, the character is appended to the output stream. If an error occurs while
43 writing the character, the shift state of the output file is left in an
47 The \fBst_ctime\fR and \fBst_mtime\fR fields of the file will be marked for
48 update between the successful execution of \fBfputwc()\fR and the next
49 successful completion of a call to \fBfflush\fR(3C) or \fBfclose\fR(3C) on the
50 same stream or a call to \fBexit\fR(2) or \fBabort\fR(3C).
53 The \fBputwc()\fR function is equivalent to \fBfputwc()\fR, except that it is
54 implemented as a macro.
57 The call \fBputwchar(\fR\fIwc\fR\fB)\fR is equivalent to
58 \fBputwc(\fR\fIwc,\fR\fB stdout)\fR\fI\&.\fR The \fBputwchar()\fR routine is
59 implemented as a macro.
63 Upon successful completion, \fBfputwc()\fR, \fBputwc()\fR, and \fBputwchar()\fR
64 return \fIwc\fR. Otherwise, they return \fBWEOF\fR, the error indicator for the
65 stream is set, and \fBerrno\fR is set to indicate the error.
69 The \fBfputwc()\fR, \fBputwc()\fR, and \fBputwchar()\fR functions will fail if
70 either the stream is unbuffered or data in the \fIstream\fR's buffer needs to
78 The \fBO_NONBLOCK\fR flag is set for the file descriptor underlying
79 \fIstream\fR and the process would be delayed in the write operation.
88 The file descriptor underlying \fIstream\fR is not a valid file descriptor open
98 An attempt was made to write to a file that exceeds the maximum file size or
99 the process's file size limit; or the file is a regular file and an attempt was
100 made to write at or beyond the offset maximum associated with the corresponding
110 The write operation was terminated due to the receipt of a signal, and no data
120 A physical I/O error has occurred, or the process is a member of a background
121 process group attempting to write to its controlling terminal, \fBTOSTOP\fR is
122 set, the process is neither ignoring nor blocking \fBSIGTTOU\fR, and the
123 process group of the process is orphaned.
132 There was no free space remaining on the device containing the file.
141 An attempt is made to write to a pipe or \fBFIFO\fR that is not open for
142 reading by any process. A \fBSIGPIPE\fR signal will also be sent to the calling
148 The \fBfputwc()\fR, \fBputwc()\fR, and \fBputwchar()\fR functions may fail if:
155 Insufficient storage space is available.
164 A request was made of a non-existent device, or the request was outside the
165 capabilities of the device.
174 The wide-character code \fIwc\fR does not correspond to a valid character.
180 Functions exist for the \fBputwc()\fR and \fBputwchar()\fR macros. To get the
181 function form, the macro name must be undefined (for example, \fB#undef
185 When the macro form is used, \fBputwc()\fR evaluates the \fIstream\fR argument
186 more than once. In particular, \fBputwc(\fR\fIwc\fR\fB, \fR\fI*f++\fR\fB)\fR
187 does not work sensibly. The \fBfputwc()\fR function should be used instead
188 when evaluating the \fIstream\fR argument has side effects.
192 See \fBattributes\fR(5) for descriptions of the following attributes:
200 ATTRIBUTE TYPE ATTRIBUTE VALUE
202 Interface Stability Standard
210 \fBexit\fR(2), \fBulimit\fR(2), \fBabort\fR(3C), \fBfclose\fR(3C),
211 \fBferror\fR(3C), \fBfflush\fR(3C), \fBfopen\fR(3C), \fBsetbuf\fR(3C),
212 \fBattributes\fR(5), \fBstandards\fR(5)