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46 .TH FPUTWC 3C "Nov 1, 2003"
48 fputwc, putwc, putwchar \- put wide-character code on a stream
55 \fBwint_t\fR \fBfputwc\fR(\fBwchar_t\fR \fIwc\fR, \fBFILE*\fR\fIstream\fR);
60 \fBwint_t\fR \fBputwc\fR(\fBwchar_t\fR \fIwc\fR, \fBFILE*\fR\fIstream\fR);
67 \fBwint_t\fR \fBputwchar\fR(\fBwchar_t\fR \fIwc\fR);
73 The \fBfputwc()\fR function writes the character corresponding to the
74 wide-character code \fIwc\fR to the output stream pointed to by \fIstream\fR,
75 at the position indicated by the associated file-position indicator for the
76 stream (if defined), and advances the indicator appropriately. If the file
77 cannot support positioning requests, or if the stream was opened with append
78 mode, the character is appended to the output stream. If an error occurs while
79 writing the character, the shift state of the output file is left in an
83 The \fBst_ctime\fR and \fBst_mtime\fR fields of the file will be marked for
84 update between the successful execution of \fBfputwc()\fR and the next
85 successful completion of a call to \fBfflush\fR(3C) or \fBfclose\fR(3C) on the
86 same stream or a call to \fBexit\fR(2) or \fBabort\fR(3C).
89 The \fBputwc()\fR function is equivalent to \fBfputwc()\fR, except that it is
90 implemented as a macro.
93 The call \fBputwchar(\fR\fIwc\fR\fB)\fR is equivalent to
94 \fBputwc(\fR\fIwc,\fR\fB stdout)\fR\fI\&.\fR The \fBputwchar()\fR routine is
95 implemented as a macro.
99 Upon successful completion, \fBfputwc()\fR, \fBputwc()\fR, and \fBputwchar()\fR
100 return \fIwc\fR. Otherwise, they return \fBWEOF\fR, the error indicator for the
101 stream is set, and \fBerrno\fR is set to indicate the error.
105 The \fBfputwc()\fR, \fBputwc()\fR, and \fBputwchar()\fR functions will fail if
106 either the stream is unbuffered or data in the \fIstream\fR's buffer needs to
114 The \fBO_NONBLOCK\fR flag is set for the file descriptor underlying
115 \fIstream\fR and the process would be delayed in the write operation.
124 The file descriptor underlying \fIstream\fR is not a valid file descriptor open
134 An attempt was made to write to a file that exceeds the maximum file size or
135 the process's file size limit; or the file is a regular file and an attempt was
136 made to write at or beyond the offset maximum associated with the corresponding
146 The write operation was terminated due to the receipt of a signal, and no data
156 A physical I/O error has occurred, or the process is a member of a background
157 process group attempting to write to its controlling terminal, \fBTOSTOP\fR is
158 set, the process is neither ignoring nor blocking \fBSIGTTOU\fR, and the
159 process group of the process is orphaned.
168 There was no free space remaining on the device containing the file.
177 An attempt is made to write to a pipe or \fBFIFO\fR that is not open for
178 reading by any process. A \fBSIGPIPE\fR signal will also be sent to the calling
184 The \fBfputwc()\fR, \fBputwc()\fR, and \fBputwchar()\fR functions may fail if:
191 Insufficient storage space is available.
200 A request was made of a non-existent device, or the request was outside the
201 capabilities of the device.
210 The wide-character code \fIwc\fR does not correspond to a valid character.
216 Functions exist for the \fBputwc()\fR and \fBputwchar()\fR macros. To get the
217 function form, the macro name must be undefined (for example, \fB#undef
221 When the macro form is used, \fBputwc()\fR evaluates the \fIstream\fR argument
222 more than once. In particular, \fBputwc(\fR\fIwc\fR\fB, \fR\fI*f++\fR\fB)\fR
223 does not work sensibly. The \fBfputwc()\fR function should be used instead
224 when evaluating the \fIstream\fR argument has side effects.
228 See \fBattributes\fR(5) for descriptions of the following attributes:
236 ATTRIBUTE TYPE ATTRIBUTE VALUE
238 Interface Stability Standard
246 \fBexit\fR(2), \fBulimit\fR(2), \fBabort\fR(3C), \fBfclose\fR(3C),
247 \fBferror\fR(3C), \fBfflush\fR(3C), \fBfopen\fR(3C), \fBsetbuf\fR(3C),
248 \fBattributes\fR(5), \fBstandards\fR(5)