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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
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initial import
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+/* Copyright (C) 1991, 1992, 1993, 1994 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+/*
+ * POSIX Standard: 5.1.2 Directory Operations <dirent.h>
+ */
+
+#ifndef _DIRENT_H
+
+#define _DIRENT_H 1
+#include <features.h>
+
+__BEGIN_DECLS
+
+#include <gnu/types.h>
+
+
+/* Directory entry structure.
+
+ This structure is laid out identically to the `struct direct' that
+ represents directory entries in the GNU Hurd and in BSD 4.4 (and
+ incidentally, on disk in the Berkeley fast file system). The `readdir'
+ implementations for GNU and BSD know this; you must change them if you
+ change this structure. */
+
+struct dirent
+ {
+ __ino_t d_fileno; /* File serial number. */
+ unsigned short int d_reclen; /* Length of the whole `struct dirent'. */
+ unsigned char d_type; /* File type, possibly unknown. */
+ unsigned char d_namlen; /* Length of the file name. */
+
+ /* Only this member is in the POSIX standard. */
+ char d_name[1]; /* File name (actually longer). */
+ };
+
+#if defined(__USE_BSD) || defined(__USE_MISC)
+#define d_ino d_fileno /* Backward compatibility. */
+#endif
+
+#ifdef __USE_BSD
+/* File types for `d_type'. */
+enum
+ {
+ DT_UNKNOWN = 0,
+ DT_FIFO = 1,
+ DT_CHR = 2,
+ DT_DIR = 4,
+ DT_BLK = 6,
+ DT_REG = 8,
+ DT_LNK = 10,
+ DT_SOCK = 12
+ };
+
+/* Convert between stat structure types and directory types. */
+#define IFTODT(mode) (((mode) & 0170000) >> 12)
+#define DTTOIF(dirtype) ((dirtype) << 12)
+#endif
+
+
+/* Get the system-dependent definition of `DIR',
+ the data type of directory stream objects. */
+#include <dirstream.h>
+
+/* Open a directory stream on NAME.
+ Return a DIR stream on the directory, or NULL if it could not be opened. */
+extern DIR *opendir __P ((__const char *__name));
+
+/* Close the directory stream DIRP.
+ Return 0 if successful, -1 if not. */
+extern int closedir __P ((DIR * __dirp));
+
+/* 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. */
+extern struct dirent *readdir __P ((DIR * __dirp));
+
+/* Rewind DIRP to the beginning of the directory. */
+extern void rewinddir __P ((DIR * __dirp));
+
+#if defined(__USE_BSD) || defined(__USE_MISC)
+
+#ifndef MAXNAMLEN
+/* Get the definitions of the POSIX.1 limits. */
+#include <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
+
+#include <gnu/types.h>
+#define __need_size_t
+#include <stddef.h>
+
+/* Seek to position POS on DIRP. */
+extern void seekdir __P ((DIR * __dirp, __off_t __pos));
+
+/* Return the current position of DIRP. */
+extern __off_t telldir __P ((DIR * __dirp));
+
+/* Scan the directory DIR, calling SELECT 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. */
+extern int scandir __P ((__const char *__dir,
+ struct dirent ***__namelist,
+ int (*__select) __P ((struct dirent *)),
+ int (*__cmp) __P ((__const __ptr_t,
+ __const __ptr_t))));
+
+/* Function to compare two `struct dirent's alphabetically. */
+extern int alphasort __P ((__const __ptr_t, __const __ptr_t));
+
+
+/* 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. */
+extern __ssize_t __getdirentries __P ((int __fd, char *__buf,
+ size_t __nbytes, __off_t *__basep));
+extern __ssize_t getdirentries __P ((int __fd, char *__buf,
+ size_t __nbytes, __off_t *__basep));
+
+
+#endif /* Use BSD or misc. */
+
+__END_DECLS
+
+#endif /* dirent.h */