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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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FGETWS(3P) POSIX Programmer's Manual FGETWS(3P)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior), or
the interface may not be implemented on Linux.
fgetws — get a wide-character string from a stream
#include <stdio.h>
#include <wchar.h>
wchar_t *fgetws(wchar_t *restrict ws, int n,
FILE *restrict stream);
The functionality described on this reference page is aligned with
the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The fgetws() function shall read characters from the stream,
convert these to the corresponding wide-character codes, place
them in the wchar_t array pointed to by ws, until n-1 characters
are read, or a <newline> is read, converted, and transferred to
ws, or an end-of-file condition is encountered. The wide-character
string, ws, shall then be terminated with a null wide-character
code.
If an error occurs, the resulting value of the file position
indicator for the stream is unspecified.
The fgetws() function may mark the last data access timestamp of
the file associated with stream for update. The last data access
timestamp shall be marked for update by the first successful
execution of fgetwc(), fgetws(), fwscanf(), getwc(), getwchar(),
vfwscanf(), vwscanf(), or wscanf() using stream that returns data
not supplied by a prior call to ungetwc().
Upon successful completion, fgetws() shall return ws. If the end-
of-file indicator for the stream is set, or if the stream is at
end-of-file, the end-of-file indicator for the stream shall be set
and fgetws() shall return a null pointer. If a read error occurs,
the error indicator for the stream shall be set, fgetws() shall
return a null pointer, and shall set errno to indicate the error.
Refer to fgetwc(3p).
The following sections are informative.
None.
None.
None.
None.
Section 2.5, Standard I/O Streams, fopen(3p), fread(3p)
The Base Definitions volume of POSIX.1‐2017, stdio.h(0p),
wchar.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 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 .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 FGETWS(3P)
Pages that refer to this page: wchar.h(0p)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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