glibc/sysdeps/posix/dl-fileid.h
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

51 lines
1.6 KiB
C

/* File identity for the dynamic linker. Generic POSIX.1 version.
Copyright (C) 2015-2022 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 <stdbool.h>
#include <sys/stat.h>
/* For POSIX.1 systems, the pair of st_dev and st_ino constitute
a unique identifier for a file. */
struct r_file_id
{
dev_t dev;
ino64_t ino;
};
/* Sample FD to fill in *ID. Returns true on success.
On error, returns false, with errno set. */
static inline bool
_dl_get_file_id (int fd, struct r_file_id *id)
{
struct __stat64_t64 st;
if (__glibc_unlikely (__fstat64_time64 (fd, &st) < 0))
return false;
id->dev = st.st_dev;
id->ino = st.st_ino;
return true;
}
/* Compare two results from _dl_get_file_id for equality. */
static inline bool
_dl_file_id_match_p (const struct r_file_id *a, const struct r_file_id *b)
{
return a->dev == b->dev && a->ino == b->ino;
}