projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 478b92f0 UD |
1 | /* Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| ce7f605b | 3 | |
| 478b92f0 UD |
4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| ce7f605b | 8 | |
| 478b92f0 UD |
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 | Library General Public License for more details. | |
| ce7f605b | 13 | |
| 478b92f0 UD |
14 | You should have received a copy of the GNU Library General Public |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 17 | Boston, MA 02111-1307, USA. */ | |
| ce7f605b TBB |
18 | |
| 19 | #include <errno.h> | |
| 20 | #include <limits.h> | |
| 21 | #include <stddef.h> | |
| 22 | #include <string.h> | |
| 23 | #include <dirent.h> | |
| 24 | #include <unistd.h> | |
| 25 | #include <sys/types.h> | |
| 26 | #include <hurd.h> | |
| 27 | #include <hurd/fd.h> | |
| 28 | #include "dirstream.h" | |
| 29 | ||
| 30 | ||
| 31 | /* Read a directory entry from DIRP. */ | |
| 32 | int | |
| 33 | __readdir_r (DIR *dirp, struct dirent *entry, struct dirent **result) | |
| 34 | { | |
| 35 | struct dirent *dp; | |
| 36 | ||
| 37 | if (dirp == NULL) | |
| 38 | { | |
| 39 | errno = EINVAL; | |
| 40 | return -1; | |
| 41 | } | |
| 42 | ||
| 43 | __libc_lock_lock (dirp->__lock); | |
| 44 | ||
| 45 | do | |
| 46 | { | |
| 47 | if (dirp->__ptr - dirp->__data >= dirp->__size) | |
| 48 | { | |
| 49 | /* We've emptied out our buffer. Refill it. */ | |
| 50 | ||
| 51 | char *data = dirp->__data; | |
| 52 | int nentries; | |
| 53 | error_t err; | |
| 54 | ||
| 55 | if (err = HURD_FD_PORT_USE (dirp->__fd, | |
| 56 | __dir_readdir (port, | |
| 57 | &data, &dirp->__size, | |
| 58 | dirp->__entry_ptr, | |
| 59 | -1, 0, &nentries))) | |
| 60 | { | |
| 61 | __hurd_fail (err); | |
| 62 | dp = NULL; | |
| 63 | break; | |
| 64 | } | |
| 65 | ||
| 66 | /* DATA now corresponds to entry index DIRP->__entry_ptr. */ | |
| 67 | dirp->__entry_data = dirp->__entry_ptr; | |
| 68 | ||
| 69 | if (data != dirp->__data) | |
| 70 | { | |
| 71 | /* The data was passed out of line, so our old buffer is no | |
| 72 | longer useful. Deallocate the old buffer and reset our | |
| 73 | information for the new buffer. */ | |
| 74 | __vm_deallocate (__mach_task_self (), | |
| 75 | (vm_address_t) dirp->__data, | |
| 76 | dirp->__allocation); | |
| 77 | dirp->__data = data; | |
| 78 | dirp->__allocation = round_page (dirp->__size); | |
| 79 | } | |
| 80 | ||
| 81 | /* Reset the pointer into the buffer. */ | |
| 82 | dirp->__ptr = dirp->__data; | |
| 83 | ||
| 84 | if (nentries == 0) | |
| 85 | { | |
| 86 | /* End of file. */ | |
| 87 | dp = NULL; | |
| 88 | break; | |
| 89 | } | |
| 90 | ||
| 91 | /* We trust the filesystem to return correct data and so we | |
| 92 | ignore NENTRIES. */ | |
| 93 | } | |
| 94 | ||
| 95 | dp = (struct dirent *) dirp->__ptr; | |
| 96 | dirp->__ptr += dp->d_reclen; | |
| 97 | ++dirp->__entry_ptr; | |
| 98 | ||
| 99 | /* Loop to ignore deleted files. */ | |
| 100 | } while (dp->d_fileno == 0); | |
| 101 | ||
| 102 | if (dp) | |
| 103 | { | |
| 104 | *entry = *dp; | |
| 105 | *result = entry; | |
| 106 | } | |
| 107 | ||
| 108 | __libc_lock_unlock (dirp->__lock); | |
| 109 | ||
| 110 | return dp ? 0 : -1; | |
| 111 | } | |
| 112 | weak_alias (__readdir_r, readdir_r) |