1 /* Copyright (C) 1991,92,93,94,95,96,97,98,99,2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
25 #include <sys/types.h>
28 #include <dirstream.h>
31 # define __READDIR_R __readdir_r
32 # define __GETDENTS __getdents
33 # define DIRENT_TYPE struct dirent
34 # define __READDIR_R_ALIAS
37 /* Read a directory entry from DIRP. */
39 __READDIR_R (DIR *dirp
, DIRENT_TYPE
*entry
, DIRENT_TYPE
**result
)
44 __libc_lock_lock (dirp
->lock
);
48 if (dirp
->offset
>= dirp
->size
)
50 /* We've emptied out our buffer. Refill it. */
55 #ifndef _DIRENT_HAVE_D_RECLEN
56 /* Fixed-size struct; must read one at a time (see below). */
59 maxread
= dirp
->allocation
;
62 bytes
= __GETDENTS (dirp
->fd
, dirp
->data
, maxread
);
66 /* Reclen != 0 signals that an error occurred. */
70 dirp
->size
= (size_t) bytes
;
72 /* Reset the offset into the buffer. */
76 dp
= (DIRENT_TYPE
*) &dirp
->data
[dirp
->offset
];
78 #ifdef _DIRENT_HAVE_D_RECLEN
79 reclen
= dp
->d_reclen
;
81 /* The only version of `struct dirent*' that lacks `d_reclen'
83 assert (sizeof dp
->d_name
> 1);
85 /* The name is not terminated if it is the largest possible size.
86 Clobber the following byte to ensure proper null termination. We
87 read just one entry at a time above so we know that byte will not
89 dp
->d_name
[sizeof dp
->d_name
] = '\0';
92 dirp
->offset
+= reclen
;
94 #ifdef _DIRENT_HAVE_D_OFF
95 dirp
->filepos
= dp
->d_off
;
97 dirp
->filepos
+= reclen
;
100 /* Skip deleted files. */
102 while (dp
->d_ino
== 0);
105 *result
= memcpy (entry
, dp
, reclen
);
109 __libc_lock_unlock (dirp
->lock
);
111 return dp
!= NULL
? 0 : reclen
? errno
: 0;
114 #ifdef __READDIR_R_ALIAS
115 weak_alias (__readdir_r
, readdir_r
)