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.
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.1‐2008 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.
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) 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.unix.org/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
IEEE/The Open Group 2013 FGETWS(3P)