win32: make stat(2) fail for /dev/zero, /dev/urandom

/dev/zero and /dev/urandom are only available internally and as
arguments to 'dd'.  Since users can't otherwise access them they
shouldn't be treated as existing by stat(2).

With this change stat(1) and test(1) will deny their existence.

(GitHub issue #282)

1 files changed, 2 insertions, 1 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index a8170bb9c..b1225665c 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -359,8 +359,9 @@ static int get_file_attr(const char *fname, WIN32_FILE_ATTRIBUTE_DATA *fdata)
 {
         char *want_dir;
 
-        if (get_dev_type(fname) != NOT_DEVICE || get_dev_fd(fname) >= 0) {
+        if (get_dev_type(fname) == DEV_NULL || get_dev_fd(fname) >= 0) {
                 /* Fake attributes for special devices */
+                /* Though not /dev/zero or /dev/urandom */
                 FILETIME epoch = {0xd53e8000, 0x019db1de};      // Unix epoch as FILETIME
                 fdata->dwFileAttributes = FILE_ATTRIBUTE_DEVICE;
                 fdata->ftCreationTime = fdata->ftLastAccessTime =