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-rw-r--r--win32/dirent.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/win32/dirent.c b/win32/dirent.c
new file mode 100644
index 000000000..f0e8deae2
--- /dev/null
+++ b/win32/dirent.c
@@ -0,0 +1,124 @@
1#include "libbb.h"
2
3struct DIR {
4 struct dirent dd_dir;
5 HANDLE dd_handle; /* FindFirstFile handle */
6 int not_first;
7 int got_dot;
8 int got_dotdot;
9};
10
11static inline void finddata2dirent(struct dirent *ent, WIN32_FIND_DATAA *fdata)
12{
13 /* copy file name from WIN32_FIND_DATA to dirent */
14 strcpy(ent->d_name, fdata->cFileName);
15
16 if ((fdata->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
17 (fdata->dwReserved0 == IO_REPARSE_TAG_SYMLINK ||
18 fdata->dwReserved0 == IO_REPARSE_TAG_MOUNT_POINT ||
19 fdata->dwReserved0 == IO_REPARSE_TAG_APPEXECLINK))
20 ent->d_type = DT_LNK;
21 else if (fdata->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
22 ent->d_type = DT_DIR;
23 else
24 ent->d_type = DT_REG;
25}
26
27DIR *opendir(const char *name)
28{
29 char pattern[MAX_PATH];
30 WIN32_FIND_DATAA fdata;
31 HANDLE h;
32 int len;
33 DIR *dir;
34
35 /* check that name is not NULL */
36 if (!name) {
37 errno = EINVAL;
38 return NULL;
39 }
40 /* check that the pattern won't be too long for FindFirstFileA */
41 len = strlen(name);
42 if (len + 2 >= MAX_PATH) {
43 errno = ENAMETOOLONG;
44 return NULL;
45 }
46 /* copy name to temp buffer */
47 strcpy(pattern, name);
48
49 /* append optional '/' and wildcard '*' */
50 if (len && !is_dir_sep(pattern[len - 1]))
51 pattern[len++] = '/';
52 pattern[len++] = '*';
53 pattern[len] = 0;
54
55 /* open find handle */
56 h = FindFirstFileA(pattern, &fdata);
57 if (h == INVALID_HANDLE_VALUE) {
58 DWORD err = GetLastError();
59 errno = (err == ERROR_DIRECTORY) ? ENOTDIR : err_win_to_posix();
60 return NULL;
61 }
62
63 /* initialize DIR structure and copy first dir entry */
64 dir = xzalloc(sizeof(DIR));
65 dir->dd_handle = h;
66 /* dir->not_first = 0; */
67 /* dir->got_dot = 0; */
68 /* dir->got_dotdot = 0; */
69 finddata2dirent(&dir->dd_dir, &fdata);
70 return dir;
71}
72
73struct dirent *readdir(DIR *dir)
74{
75 if (!dir) {
76 errno = EBADF; /* No set_errno for mingw */
77 return NULL;
78 }
79
80 /* if first entry, dirent has already been set up by opendir */
81 if (dir->not_first) {
82 /* get next entry and convert from WIN32_FIND_DATA to dirent */
83 WIN32_FIND_DATAA fdata;
84 if (FindNextFileA(dir->dd_handle, &fdata)) {
85 finddata2dirent(&dir->dd_dir, &fdata);
86 } else if (!dir->got_dot) {
87 strcpy(dir->dd_dir.d_name, ".");
88 dir->dd_dir.d_type = DT_DIR;
89 } else if (!dir->got_dotdot) {
90 strcpy(dir->dd_dir.d_name, "..");
91 dir->dd_dir.d_type = DT_DIR;
92 } else {
93 DWORD lasterr = GetLastError();
94 /* POSIX says you shouldn't set errno when readdir can't
95 find any more files; so, if another error we leave it set. */
96 if (lasterr != ERROR_NO_MORE_FILES)
97 errno = err_win_to_posix();
98 return NULL;
99 }
100 }
101
102 /* Have we seen '.' or '..'? */
103 if (dir->dd_dir.d_name[0] == '.') {
104 if (dir->dd_dir.d_name[1] == '\0')
105 dir->got_dot = TRUE;
106 else if (dir->dd_dir.d_name[1] == '.' && dir->dd_dir.d_name[2] == '\0')
107 dir->got_dotdot = TRUE;
108 }
109
110 dir->not_first = TRUE;
111 return &dir->dd_dir;
112}
113
114int closedir(DIR *dir)
115{
116 if (!dir) {
117 errno = EBADF;
118 return -1;
119 }
120
121 FindClose(dir->dd_handle);
122 free(dir);
123 return 0;
124}