glibc/debug/fgetws_chk.c
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

53 lines
1.7 KiB
C

/* Copyright (C) 1993-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include "libioP.h"
#include <wchar.h>
#include <sys/param.h>
wchar_t *
__fgetws_chk (wchar_t *buf, size_t size, int n, FILE *fp)
{
size_t count;
wchar_t *result;
int old_error;
CHECK_FILE (fp, NULL);
if (n <= 0)
return NULL;
_IO_acquire_lock (fp);
/* This is very tricky since a file descriptor may be in the
non-blocking mode. The error flag doesn't mean much in this
case. We return an error only when there is a new error. */
old_error = fp->_flags & _IO_ERR_SEEN;
fp->_flags &= ~_IO_ERR_SEEN;
count = _IO_getwline (fp, buf, MIN ((size_t) n - 1, size), L'\n', 1);
/* If we read in some bytes and errno is EAGAIN, that error will
be reported for next read. */
if (count == 0 || (_IO_ferror_unlocked (fp) && errno != EAGAIN))
result = NULL;
else if (count >= size)
__chk_fail ();
else
{
buf[count] = '\0';
result = buf;
}
fp->_flags |= old_error;
_IO_release_lock (fp);
return result;
}