51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* File identity for the dynamic linker. Generic POSIX.1 version.
|
|
Copyright (C) 2015 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
|
|
<http://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 st;
|
|
|
|
if (__glibc_unlikely (__fxstat64 (_STAT_VER, 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;
|
|
}
|