/*
* Create an fsentry-based directory listing (similar to opendir / readdir).
* Dir should not contain trailing '/'. Use an empty string for the current
* directory (not "."!).
*/
static struct fsentry *fsentry_create_list(const struct fsentry *dir)
{
wchar_t pattern[MAX_LONG_PATH + 2]; /* + 2 for "\*" */
WIN32_FIND_DATAW fdata;
HANDLE h;
int wlen;
struct fsentry *list, **phead;
DWORD err;
/* convert name to UTF-16 and check length */
if ((wlen = xutftowcs_path_ex(pattern, dir->name, MAX_LONG_PATH,
dir->len, MAX_PATH - 2, core_long_paths)) < 0)
return NULL;
/*
* append optional '\' and wildcard '*'. Note: we need to use '\' as
* Windows doesn't translate '/' to '\' for "\\?\"-prefixed paths.
*/
if (wlen)
pattern[wlen++] = '\\';
pattern[wlen++] = '*';
pattern[wlen] = 0;
/* open find handle */
h = FindFirstFileW(pattern, &fdata);
if (h == INVALID_HANDLE_VALUE) {
err = GetLastError();
errno = (err == ERROR_DIRECTORY) ? ENOTDIR : err_win_to_posix(err);
return NULL;
}
/* allocate object to hold directory listing */
list = fsentry_alloc(NULL, dir->name, dir->len);
/* walk directory and build linked list of fsentry structures */
phead = &list->next;
do {
*phead = fseentry_create_entry(list, &fdata);
phead = &(*phead)->next;
} while (FindNextFileW(h, &fdata));
/* remember result of last FindNextFile, then close find handle */
err = GetLastError();
FindClose(h);
/* return the list if we've got all the files */
if (err == ERROR_NO_MORE_FILES)
return list;
/* otherwise free the list and return error */
fsentry_release(list);
errno = err_win_to_posix(err);
return NULL;
}
/*
* Create an fsentry-based directory listing (similar to opendir / readdir).
* Dir should not contain trailing '/'. Use an empty string for the current
* directory (not "."!).
*/
static struct fsentry *fsentry_create_list(struct fscache *cache, const struct fsentry *dir,
int *dir_not_found)
{
wchar_t pattern[MAX_LONG_PATH];
NTSTATUS status;
IO_STATUS_BLOCK iosb;
PFILE_FULL_DIR_INFORMATION di;
HANDLE h;
int wlen;
struct fsentry *list, **phead;
DWORD err;
*dir_not_found = 0;
/* convert name to UTF-16 and check length */
if ((wlen = xutftowcs_path_ex(pattern, dir->name, MAX_LONG_PATH,
dir->len, MAX_PATH - 2, core_long_paths)) < 0)
return NULL;
/* handle CWD */
if (!wlen) {
wlen = GetCurrentDirectoryW(ARRAY_SIZE(pattern), pattern);
if (!wlen || wlen >= ARRAY_SIZE(pattern)) {
errno = wlen ? ENAMETOOLONG : err_win_to_posix(GetLastError());
return NULL;
}
}
h = CreateFileW(pattern, FILE_LIST_DIRECTORY,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (h == INVALID_HANDLE_VALUE) {
err = GetLastError();
*dir_not_found = 1; /* or empty directory */
errno = (err == ERROR_DIRECTORY) ? ENOTDIR : err_win_to_posix(err);
trace_printf_key(&trace_fscache, "fscache: error(%d) '%.*s'\n",
errno, dir->len, dir->name);
return NULL;
}
/* allocate object to hold directory listing */
list = fsentry_alloc(cache, NULL, dir->name, dir->len);
list->st_mode = S_IFDIR;
/* walk directory and build linked list of fsentry structures */
phead = &list->next;
status = NtQueryDirectoryFile(h, NULL, 0, 0, &iosb, cache->buffer,
sizeof(cache->buffer), FileFullDirectoryInformation, FALSE, NULL, FALSE);
if (!NT_SUCCESS(status)) {
/*
* NtQueryDirectoryFile returns STATUS_INVALID_PARAMETER when
* asked to enumerate an invalid directory (ie it is a file
* instead of a directory). Verify that is the actual cause
* of the error.
*/
if (status == STATUS_INVALID_PARAMETER) {
DWORD attributes = GetFileAttributesW(pattern);
if (!(attributes & FILE_ATTRIBUTE_DIRECTORY))
status = ERROR_DIRECTORY;
}
goto Error;
}
di = (PFILE_FULL_DIR_INFORMATION)(cache->buffer);
for (;;) {
*phead = fseentry_create_entry(cache, list, di);
phead = &(*phead)->next;
/* If there is no offset in the entry, the buffer has been exhausted. */
if (di->NextEntryOffset == 0) {
status = NtQueryDirectoryFile(h, NULL, 0, 0, &iosb, cache->buffer,
sizeof(cache->buffer), FileFullDirectoryInformation, FALSE, NULL, FALSE);
if (!NT_SUCCESS(status)) {
if (status == STATUS_NO_MORE_FILES)
break;
goto Error;
}
di = (PFILE_FULL_DIR_INFORMATION)(cache->buffer);
continue;
}
/* Advance to the next entry. */
di = (PFILE_FULL_DIR_INFORMATION)(((PUCHAR)di) + di->NextEntryOffset);
}
CloseHandle(h);
return list;
Error:
errno = (status == ERROR_DIRECTORY) ? ENOTDIR : err_win_to_posix(status);
trace_printf_key(&trace_fscache, "fscache: error(%d) unable to query directory contents '%.*s'\n",
errno, dir->len, dir->name);
CloseHandle(h);
fsentry_release(list);
return NULL;
}
