mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-15 10:17:20 +00:00
9f72c0322c
- In the unionfs case, opendir() and fdopendir() read the directory's full contents and cache it. This cache is not refreshed when rewinddir() is called, so rewinddir() will not notice updates to a directory. Fix this by splitting the code to fetch a directory's contents out of __opendir_common() into a new _filldir() function and call this from rewinddir() when operating on a unionfs directory. - If rewinddir() is called on a directory opened with fdopendir() before any directory entries are fetched, rewinddir() will not adjust the seek location of the backing file descriptor. If the file descriptor passed to fdopendir() had a non-zero offset, the rewinddir() will not rewind to the beginning. Fix this by always seeking back to 0 in rewinddir(). This means the dd_rewind hack can also be removed. While here, add missing locking to rewinddir(). CR: https://phabric.freebsd.org/D312 Reviewed by: jilles MFC after: 1 week
115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/*-
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)dirent.h 8.2 (Berkeley) 7/28/94
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _DIRENT_H_
|
|
#define _DIRENT_H_
|
|
|
|
/*
|
|
* The kernel defines the format of directory entries returned by
|
|
* the getdirentries(2) system call.
|
|
*/
|
|
#include <sys/cdefs.h>
|
|
#include <sys/dirent.h>
|
|
|
|
#if __XSI_VISIBLE
|
|
/*
|
|
* XXX this is probably illegal in the __XSI_VISIBLE case, but brings us closer
|
|
* to the specification.
|
|
*/
|
|
#define d_ino d_fileno /* backward and XSI compatibility */
|
|
#endif
|
|
|
|
#if __BSD_VISIBLE
|
|
|
|
#include <sys/_null.h>
|
|
|
|
/* definitions for library routines operating on directories. */
|
|
#define DIRBLKSIZ 1024
|
|
|
|
struct _dirdesc;
|
|
typedef struct _dirdesc DIR;
|
|
|
|
/* flags for opendir2 */
|
|
#define DTF_HIDEW 0x0001 /* hide whiteout entries */
|
|
#define DTF_NODUP 0x0002 /* don't return duplicate names */
|
|
#define DTF_REWIND 0x0004 /* rewind after reading union stack */
|
|
#define __DTF_READALL 0x0008 /* everything has been read */
|
|
#define __DTF_SKIPREAD 0x0010 /* assume internal buffer is populated */
|
|
|
|
#else /* !__BSD_VISIBLE */
|
|
|
|
typedef void * DIR;
|
|
|
|
#endif /* __BSD_VISIBLE */
|
|
|
|
#ifndef _KERNEL
|
|
|
|
__BEGIN_DECLS
|
|
#if __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE >= 700
|
|
int alphasort(const struct dirent **, const struct dirent **);
|
|
int dirfd(DIR *);
|
|
#endif
|
|
#if __BSD_VISIBLE
|
|
DIR *__opendir2(const char *, int);
|
|
int fdclosedir(DIR *);
|
|
int getdents(int, char *, int);
|
|
int getdirentries(int, char *, int, long *);
|
|
#endif
|
|
DIR *opendir(const char *);
|
|
DIR *fdopendir(int);
|
|
struct dirent *
|
|
readdir(DIR *);
|
|
#if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE >= 500
|
|
int readdir_r(DIR *, struct dirent *, struct dirent **);
|
|
#endif
|
|
void rewinddir(DIR *);
|
|
#if __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE >= 700
|
|
int scandir(const char *, struct dirent ***,
|
|
int (*)(const struct dirent *), int (*)(const struct dirent **,
|
|
const struct dirent **));
|
|
#ifdef __BLOCKS__
|
|
int scandir_b(const char *, struct dirent ***,
|
|
int (^)(const struct dirent *),
|
|
int (^)(const struct dirent **, const struct dirent **));
|
|
#endif
|
|
#endif
|
|
#if __XSI_VISIBLE
|
|
void seekdir(DIR *, long);
|
|
long telldir(DIR *);
|
|
#endif
|
|
int closedir(DIR *);
|
|
__END_DECLS
|
|
|
|
#endif /* !_KERNEL */
|
|
|
|
#endif /* !_DIRENT_H_ */
|