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#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 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.
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. stream was created by open_wmemstream(3C) and a wide-character or byte sequence buffered is invalid in the current locale.
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.
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.
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Standard |
| MT-Level MT-Safe |