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51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* File identity for the dynamic linker. Generic POSIX.1 version.
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Copyright (C) 2015-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdbool.h>
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#include <sys/stat.h>
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/* For POSIX.1 systems, the pair of st_dev and st_ino constitute
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a unique identifier for a file. */
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struct r_file_id
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{
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dev_t dev;
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ino64_t ino;
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};
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/* Sample FD to fill in *ID. Returns true on success.
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On error, returns false, with errno set. */
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static inline bool
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_dl_get_file_id (int fd, struct r_file_id *id)
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{
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struct stat64 st;
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if (__glibc_unlikely (__fxstat64 (_STAT_VER, fd, &st) < 0))
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return false;
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id->dev = st.st_dev;
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id->ino = st.st_ino;
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return true;
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}
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/* Compare two results from _dl_get_file_id for equality. */
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static inline bool
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_dl_file_id_match_p (const struct r_file_id *a, const struct r_file_id *b)
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{
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return a->dev == b->dev && a->ino == b->ino;
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}
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