405 lines
12 KiB
C
405 lines
12 KiB
C
/* Copyright (C) 1991-2000,2003-2005,2009,2010,2011,2012
|
|
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/>. */
|
|
|
|
/*
|
|
* POSIX Standard: 5.1.2 Directory Operations <dirent.h>
|
|
*/
|
|
|
|
#ifndef _DIRENT_H
|
|
#define _DIRENT_H 1
|
|
|
|
#include <features.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
#include <bits/types.h>
|
|
|
|
#ifdef __USE_XOPEN
|
|
# ifndef __ino_t_defined
|
|
# ifndef __USE_FILE_OFFSET64
|
|
typedef __ino_t ino_t;
|
|
# else
|
|
typedef __ino64_t ino_t;
|
|
# endif
|
|
# define __ino_t_defined
|
|
# endif
|
|
# if defined __USE_LARGEFILE64 && !defined __ino64_t_defined
|
|
typedef __ino64_t ino64_t;
|
|
# define __ino64_t_defined
|
|
# endif
|
|
#endif
|
|
|
|
/* This file defines `struct dirent'.
|
|
|
|
It defines the macro `_DIRENT_HAVE_D_NAMLEN' iff there is a `d_namlen'
|
|
member that gives the length of `d_name'.
|
|
|
|
It defines the macro `_DIRENT_HAVE_D_RECLEN' iff there is a `d_reclen'
|
|
member that gives the size of the entire directory entry.
|
|
|
|
It defines the macro `_DIRENT_HAVE_D_OFF' iff there is a `d_off'
|
|
member that gives the file offset of the next directory entry.
|
|
|
|
It defines the macro `_DIRENT_HAVE_D_TYPE' iff there is a `d_type'
|
|
member that gives the type of the file.
|
|
*/
|
|
|
|
#include <bits/dirent.h>
|
|
|
|
#if (defined __USE_BSD || defined __USE_MISC) && !defined d_fileno
|
|
# define d_ino d_fileno /* Backward compatibility. */
|
|
#endif
|
|
|
|
/* These macros extract size information from a `struct dirent *'.
|
|
They may evaluate their argument multiple times, so it must not
|
|
have side effects. Each of these may involve a relatively costly
|
|
call to `strlen' on some systems, so these values should be cached.
|
|
|
|
_D_EXACT_NAMLEN (DP) returns the length of DP->d_name, not including
|
|
its terminating null character.
|
|
|
|
_D_ALLOC_NAMLEN (DP) returns a size at least (_D_EXACT_NAMLEN (DP) + 1);
|
|
that is, the allocation size needed to hold the DP->d_name string.
|
|
Use this macro when you don't need the exact length, just an upper bound.
|
|
This macro is less likely to require calling `strlen' than _D_EXACT_NAMLEN.
|
|
*/
|
|
|
|
#ifdef _DIRENT_HAVE_D_NAMLEN
|
|
# define _D_EXACT_NAMLEN(d) ((d)->d_namlen)
|
|
# define _D_ALLOC_NAMLEN(d) (_D_EXACT_NAMLEN (d) + 1)
|
|
#else
|
|
# define _D_EXACT_NAMLEN(d) (strlen ((d)->d_name))
|
|
# ifdef _DIRENT_HAVE_D_RECLEN
|
|
# define _D_ALLOC_NAMLEN(d) (((char *) (d) + (d)->d_reclen) - &(d)->d_name[0])
|
|
# else
|
|
# define _D_ALLOC_NAMLEN(d) (sizeof (d)->d_name > 1 ? sizeof (d)->d_name : \
|
|
_D_EXACT_NAMLEN (d) + 1)
|
|
# endif
|
|
#endif
|
|
|
|
|
|
#ifdef __USE_BSD
|
|
/* File types for `d_type'. */
|
|
enum
|
|
{
|
|
DT_UNKNOWN = 0,
|
|
# define DT_UNKNOWN DT_UNKNOWN
|
|
DT_FIFO = 1,
|
|
# define DT_FIFO DT_FIFO
|
|
DT_CHR = 2,
|
|
# define DT_CHR DT_CHR
|
|
DT_DIR = 4,
|
|
# define DT_DIR DT_DIR
|
|
DT_BLK = 6,
|
|
# define DT_BLK DT_BLK
|
|
DT_REG = 8,
|
|
# define DT_REG DT_REG
|
|
DT_LNK = 10,
|
|
# define DT_LNK DT_LNK
|
|
DT_SOCK = 12,
|
|
# define DT_SOCK DT_SOCK
|
|
DT_WHT = 14
|
|
# define DT_WHT DT_WHT
|
|
};
|
|
|
|
/* Convert between stat structure types and directory types. */
|
|
# define IFTODT(mode) (((mode) & 0170000) >> 12)
|
|
# define DTTOIF(dirtype) ((dirtype) << 12)
|
|
#endif
|
|
|
|
|
|
/* This is the data type of directory stream objects.
|
|
The actual structure is opaque to users. */
|
|
typedef struct __dirstream DIR;
|
|
|
|
/* Open a directory stream on NAME.
|
|
Return a DIR stream on the directory, or NULL if it could not be opened.
|
|
|
|
This function is a possible cancellation point and therefore not
|
|
marked with __THROW. */
|
|
extern DIR *opendir (const char *__name) __nonnull ((1));
|
|
|
|
#ifdef __USE_XOPEN2K8
|
|
/* Same as opendir, but open the stream on the file descriptor FD.
|
|
|
|
This function is a possible cancellation point and therefore not
|
|
marked with __THROW. */
|
|
extern DIR *fdopendir (int __fd);
|
|
#endif
|
|
|
|
/* Close the directory stream DIRP.
|
|
Return 0 if successful, -1 if not.
|
|
|
|
This function is a possible cancellation point and therefore not
|
|
marked with __THROW. */
|
|
extern int closedir (DIR *__dirp) __nonnull ((1));
|
|
|
|
/* Read a directory entry from DIRP. Return a pointer to a `struct
|
|
dirent' describing the entry, or NULL for EOF or error. The
|
|
storage returned may be overwritten by a later readdir call on the
|
|
same DIR stream.
|
|
|
|
If the Large File Support API is selected we have to use the
|
|
appropriate interface.
|
|
|
|
This function is a possible cancellation point and therefore not
|
|
marked with __THROW. */
|
|
#ifndef __USE_FILE_OFFSET64
|
|
extern struct dirent *readdir (DIR *__dirp) __nonnull ((1));
|
|
#else
|
|
# ifdef __REDIRECT
|
|
extern struct dirent *__REDIRECT (readdir, (DIR *__dirp), readdir64)
|
|
__nonnull ((1));
|
|
# else
|
|
# define readdir readdir64
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef __USE_LARGEFILE64
|
|
extern struct dirent64 *readdir64 (DIR *__dirp) __nonnull ((1));
|
|
#endif
|
|
|
|
#if defined __USE_POSIX || defined __USE_MISC
|
|
/* Reentrant version of `readdir'. Return in RESULT a pointer to the
|
|
next entry.
|
|
|
|
This function is a possible cancellation point and therefore not
|
|
marked with __THROW. */
|
|
# ifndef __USE_FILE_OFFSET64
|
|
extern int readdir_r (DIR *__restrict __dirp,
|
|
struct dirent *__restrict __entry,
|
|
struct dirent **__restrict __result)
|
|
__nonnull ((1, 2, 3));
|
|
# else
|
|
# ifdef __REDIRECT
|
|
extern int __REDIRECT (readdir_r,
|
|
(DIR *__restrict __dirp,
|
|
struct dirent *__restrict __entry,
|
|
struct dirent **__restrict __result),
|
|
readdir64_r) __nonnull ((1, 2, 3));
|
|
# else
|
|
# define readdir_r readdir64_r
|
|
# endif
|
|
# endif
|
|
|
|
# ifdef __USE_LARGEFILE64
|
|
extern int readdir64_r (DIR *__restrict __dirp,
|
|
struct dirent64 *__restrict __entry,
|
|
struct dirent64 **__restrict __result)
|
|
__nonnull ((1, 2, 3));
|
|
# endif
|
|
#endif /* POSIX or misc */
|
|
|
|
/* Rewind DIRP to the beginning of the directory. */
|
|
extern void rewinddir (DIR *__dirp) __THROW __nonnull ((1));
|
|
|
|
#if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
|
|
# include <bits/types.h>
|
|
|
|
/* Seek to position POS on DIRP. */
|
|
extern void seekdir (DIR *__dirp, long int __pos) __THROW __nonnull ((1));
|
|
|
|
/* Return the current position of DIRP. */
|
|
extern long int telldir (DIR *__dirp) __THROW __nonnull ((1));
|
|
#endif
|
|
|
|
#if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN2K8
|
|
|
|
/* Return the file descriptor used by DIRP. */
|
|
extern int dirfd (DIR *__dirp) __THROW __nonnull ((1));
|
|
|
|
# if defined __OPTIMIZE__ && defined _DIR_dirfd
|
|
# define dirfd(dirp) _DIR_dirfd (dirp)
|
|
# endif
|
|
|
|
# if defined __USE_BSD || defined __USE_MISC
|
|
# ifndef MAXNAMLEN
|
|
/* Get the definitions of the POSIX.1 limits. */
|
|
# include <bits/posix1_lim.h>
|
|
|
|
/* `MAXNAMLEN' is the BSD name for what POSIX calls `NAME_MAX'. */
|
|
# ifdef NAME_MAX
|
|
# define MAXNAMLEN NAME_MAX
|
|
# else
|
|
# define MAXNAMLEN 255
|
|
# endif
|
|
# endif
|
|
# endif
|
|
|
|
# define __need_size_t
|
|
# include <stddef.h>
|
|
|
|
/* Scan the directory DIR, calling SELECTOR on each directory entry.
|
|
Entries for which SELECT returns nonzero are individually malloc'd,
|
|
sorted using qsort with CMP, and collected in a malloc'd array in
|
|
*NAMELIST. Returns the number of entries selected, or -1 on error.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
# ifndef __USE_FILE_OFFSET64
|
|
extern int scandir (const char *__restrict __dir,
|
|
struct dirent ***__restrict __namelist,
|
|
int (*__selector) (const struct dirent *),
|
|
int (*__cmp) (const struct dirent **,
|
|
const struct dirent **))
|
|
__nonnull ((1, 2));
|
|
# else
|
|
# ifdef __REDIRECT
|
|
extern int __REDIRECT (scandir,
|
|
(const char *__restrict __dir,
|
|
struct dirent ***__restrict __namelist,
|
|
int (*__selector) (const struct dirent *),
|
|
int (*__cmp) (const struct dirent **,
|
|
const struct dirent **)),
|
|
scandir64) __nonnull ((1, 2));
|
|
# else
|
|
# define scandir scandir64
|
|
# endif
|
|
# endif
|
|
|
|
# if defined __USE_GNU && defined __USE_LARGEFILE64
|
|
/* This function is like `scandir' but it uses the 64bit dirent structure.
|
|
Please note that the CMP function must now work with struct dirent64 **. */
|
|
extern int scandir64 (const char *__restrict __dir,
|
|
struct dirent64 ***__restrict __namelist,
|
|
int (*__selector) (const struct dirent64 *),
|
|
int (*__cmp) (const struct dirent64 **,
|
|
const struct dirent64 **))
|
|
__nonnull ((1, 2));
|
|
# endif
|
|
|
|
# ifdef __USE_GNU
|
|
/* Similar to `scandir' but a relative DIR name is interpreted relative
|
|
to the directory for which DFD is a descriptor.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
# ifndef __USE_FILE_OFFSET64
|
|
extern int scandirat (int __dfd, const char *__restrict __dir,
|
|
struct dirent ***__restrict __namelist,
|
|
int (*__selector) (const struct dirent *),
|
|
int (*__cmp) (const struct dirent **,
|
|
const struct dirent **))
|
|
__nonnull ((2, 3));
|
|
# else
|
|
# ifdef __REDIRECT
|
|
extern int __REDIRECT (scandirat,
|
|
(int __dfd, const char *__restrict __dir,
|
|
struct dirent ***__restrict __namelist,
|
|
int (*__selector) (const struct dirent *),
|
|
int (*__cmp) (const struct dirent **,
|
|
const struct dirent **)),
|
|
scandirat64) __nonnull ((2, 3));
|
|
# else
|
|
# define scandirat scandirat64
|
|
# endif
|
|
# endif
|
|
|
|
/* This function is like `scandir' but it uses the 64bit dirent structure.
|
|
Please note that the CMP function must now work with struct dirent64 **. */
|
|
extern int scandirat64 (int __dfd, const char *__restrict __dir,
|
|
struct dirent64 ***__restrict __namelist,
|
|
int (*__selector) (const struct dirent64 *),
|
|
int (*__cmp) (const struct dirent64 **,
|
|
const struct dirent64 **))
|
|
__nonnull ((2, 3));
|
|
# endif
|
|
|
|
/* Function to compare two `struct dirent's alphabetically. */
|
|
# ifndef __USE_FILE_OFFSET64
|
|
extern int alphasort (const struct dirent **__e1,
|
|
const struct dirent **__e2)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
|
# else
|
|
# ifdef __REDIRECT
|
|
extern int __REDIRECT_NTH (alphasort,
|
|
(const struct dirent **__e1,
|
|
const struct dirent **__e2),
|
|
alphasort64) __attribute_pure__ __nonnull ((1, 2));
|
|
# else
|
|
# define alphasort alphasort64
|
|
# endif
|
|
# endif
|
|
|
|
# if defined __USE_GNU && defined __USE_LARGEFILE64
|
|
extern int alphasort64 (const struct dirent64 **__e1,
|
|
const struct dirent64 **__e2)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
|
# endif
|
|
#endif /* Use BSD or misc or XPG7. */
|
|
|
|
|
|
#if defined __USE_BSD || defined __USE_MISC
|
|
/* Read directory entries from FD into BUF, reading at most NBYTES.
|
|
Reading starts at offset *BASEP, and *BASEP is updated with the new
|
|
position after reading. Returns the number of bytes read; zero when at
|
|
end of directory; or -1 for errors. */
|
|
# ifndef __USE_FILE_OFFSET64
|
|
extern __ssize_t getdirentries (int __fd, char *__restrict __buf,
|
|
size_t __nbytes,
|
|
__off_t *__restrict __basep)
|
|
__THROW __nonnull ((2, 4));
|
|
# else
|
|
# ifdef __REDIRECT
|
|
extern __ssize_t __REDIRECT_NTH (getdirentries,
|
|
(int __fd, char *__restrict __buf,
|
|
size_t __nbytes,
|
|
__off64_t *__restrict __basep),
|
|
getdirentries64) __nonnull ((2, 4));
|
|
# else
|
|
# define getdirentries getdirentries64
|
|
# endif
|
|
# endif
|
|
|
|
# ifdef __USE_LARGEFILE64
|
|
extern __ssize_t getdirentries64 (int __fd, char *__restrict __buf,
|
|
size_t __nbytes,
|
|
__off64_t *__restrict __basep)
|
|
__THROW __nonnull ((2, 4));
|
|
# endif
|
|
#endif /* Use BSD or misc. */
|
|
|
|
#ifdef __USE_GNU
|
|
/* Function to compare two `struct dirent's by name & version. */
|
|
# ifndef __USE_FILE_OFFSET64
|
|
extern int versionsort (const struct dirent **__e1,
|
|
const struct dirent **__e2)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
|
# else
|
|
# ifdef __REDIRECT
|
|
extern int __REDIRECT_NTH (versionsort,
|
|
(const struct dirent **__e1,
|
|
const struct dirent **__e2),
|
|
versionsort64)
|
|
__attribute_pure__ __nonnull ((1, 2));
|
|
# else
|
|
# define versionsort versionsort64
|
|
# endif
|
|
# endif
|
|
|
|
# ifdef __USE_LARGEFILE64
|
|
extern int versionsort64 (const struct dirent64 **__e1,
|
|
const struct dirent64 **__e2)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
|
# endif
|
|
#endif /* Use GNU. */
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* dirent.h */
|