Commit | Line | Data |
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6ec2e0f5 | 1 | /* Read the next entry of a directory. |
c0c3707f | 2 | Copyright (C) 2011-2019 Free Software Foundation, Inc. |
6ec2e0f5 SDJ |
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 | |
c0c3707f | 15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
6ec2e0f5 SDJ |
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" | |
c0c3707f | 35 | <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html> |
6ec2e0f5 SDJ |
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 | } |