| 1 | /* Read the next entry of a directory. |
| 2 | Copyright (C) 2011-2016 Free Software Foundation, Inc. |
| 3 | |
| 4 | This program is free software: you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 3 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program 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 |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 16 | |
| 17 | #include <config.h> |
| 18 | |
| 19 | /* Specification. */ |
| 20 | #include <dirent.h> |
| 21 | |
| 22 | #include <errno.h> |
| 23 | #include <stddef.h> |
| 24 | |
| 25 | #include "dirent-private.h" |
| 26 | |
| 27 | struct dirent * |
| 28 | readdir (DIR *dirp) |
| 29 | { |
| 30 | char type; |
| 31 | struct dirent *result; |
| 32 | |
| 33 | /* There is no need to add code to produce entries for "." and "..". |
| 34 | According to the POSIX:2008 section "4.12 Pathname Resolution" |
| 35 | <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html> |
| 36 | "." and ".." are syntactic entities. |
| 37 | POSIX also says: |
| 38 | "If entries for dot or dot-dot exist, one entry shall be returned |
| 39 | for dot and one entry shall be returned for dot-dot; otherwise, |
| 40 | they shall not be returned." */ |
| 41 | |
| 42 | switch (dirp->status) |
| 43 | { |
| 44 | case -2: |
| 45 | /* End of directory already reached. */ |
| 46 | return NULL; |
| 47 | case -1: |
| 48 | break; |
| 49 | case 0: |
| 50 | if (!FindNextFile (dirp->current, &dirp->entry)) |
| 51 | { |
| 52 | switch (GetLastError ()) |
| 53 | { |
| 54 | case ERROR_NO_MORE_FILES: |
| 55 | dirp->status = -2; |
| 56 | return NULL; |
| 57 | default: |
| 58 | errno = EIO; |
| 59 | return NULL; |
| 60 | } |
| 61 | } |
| 62 | break; |
| 63 | default: |
| 64 | errno = dirp->status; |
| 65 | return NULL; |
| 66 | } |
| 67 | |
| 68 | dirp->status = 0; |
| 69 | |
| 70 | if (dirp->entry.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 71 | type = DT_DIR; |
| 72 | else if (dirp->entry.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) |
| 73 | type = DT_LNK; |
| 74 | else if ((dirp->entry.dwFileAttributes |
| 75 | & ~(FILE_ATTRIBUTE_READONLY |
| 76 | | FILE_ATTRIBUTE_HIDDEN |
| 77 | | FILE_ATTRIBUTE_SYSTEM |
| 78 | | FILE_ATTRIBUTE_ARCHIVE |
| 79 | | FILE_ATTRIBUTE_NORMAL |
| 80 | | FILE_ATTRIBUTE_TEMPORARY |
| 81 | | FILE_ATTRIBUTE_SPARSE_FILE |
| 82 | | FILE_ATTRIBUTE_COMPRESSED |
| 83 | | FILE_ATTRIBUTE_NOT_CONTENT_INDEXED |
| 84 | | FILE_ATTRIBUTE_ENCRYPTED)) == 0) |
| 85 | /* Devices like COM1, LPT1, NUL would also have the attributes 0x20 but |
| 86 | they cannot occur here. */ |
| 87 | type = DT_REG; |
| 88 | else |
| 89 | type = DT_UNKNOWN; |
| 90 | |
| 91 | /* Reuse the memory of dirp->entry for the result. */ |
| 92 | result = |
| 93 | (struct dirent *) |
| 94 | ((char *) dirp->entry.cFileName - offsetof (struct dirent, d_name[0])); |
| 95 | result->d_type = type; |
| 96 | |
| 97 | return result; |
| 98 | } |