mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 06:20:06 +00:00
71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
/* Detecting file changes using modification times.
|
|
Copyright (C) 2017-2023 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/>. */
|
|
|
|
#ifndef _FILE_CHANGE_DETECTION_H
|
|
#define _FILE_CHANGE_DETECTION_H
|
|
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
|
|
/* Items for identifying a particular file version. Excerpt from
|
|
struct stat64. */
|
|
struct file_change_detection
|
|
{
|
|
/* Special values: 0 if file does not exist. -1 to force mismatch
|
|
with the next comparison. */
|
|
off64_t size;
|
|
|
|
ino64_t ino;
|
|
struct __timespec64 mtime;
|
|
struct __timespec64 ctime;
|
|
};
|
|
|
|
/* Returns true if *LEFT and *RIGHT describe the same version of the
|
|
same file. */
|
|
bool __file_is_unchanged (const struct file_change_detection *left,
|
|
const struct file_change_detection *right);
|
|
|
|
/* Extract file change information to *FILE from the stat buffer
|
|
*ST. */
|
|
void __file_change_detection_for_stat (struct file_change_detection *file,
|
|
const struct __stat64_t64 *st);
|
|
|
|
/* Writes file change information for PATH to *FILE. Returns true on
|
|
success. For benign errors, *FILE is cleared, and true is
|
|
returned. For errors indicating resource outages and the like,
|
|
false is returned. */
|
|
bool __file_change_detection_for_path (struct file_change_detection *file,
|
|
const char *path);
|
|
|
|
/* Writes file change information for the stream FP to *FILE. Returns
|
|
true on success, false on failure. If FP is NULL, treat the file
|
|
as non-existing. */
|
|
bool __file_change_detection_for_fp (struct file_change_detection *file,
|
|
FILE *fp);
|
|
|
|
#ifndef _ISOMAC
|
|
libc_hidden_proto (__file_is_unchanged)
|
|
libc_hidden_proto (__file_change_detection_for_stat)
|
|
libc_hidden_proto (__file_change_detection_for_path)
|
|
libc_hidden_proto (__file_change_detection_for_fp)
|
|
#endif
|
|
|
|
#endif /* _FILE_CHANGE_DETECTION_H */
|