Fixed bug #77317 __DIR__, __FILE__, realpath() reveal physical path for subst virtual drive

Keep compatibility with 7.2 and below which better comply with
realpath(3). This might have been fixable another way, say by checking
of QueryDosDevice or alike, sadly that comes with a huge performance
impact. The new internal realpath API is kept available so is
usable when bind or network mount or other OS specific realpath
variants are needed. If not used by default, a userspace function for
this specific case might be considered to be offered in next minor.

Author: weltling

Zend/zend_virtual_cwd.c

@@ -1207,40 +1207,6 @@ static size_t tsrm_realpath_r(char *path, size_t start, size_t len, int *ll, tim
 }
 /* }}} */
 
-#ifdef ZEND_WIN32
-static size_t tsrm_win32_realpath_quick(char *path, size_t len, time_t *t) /* {{{ */
-{
-	char tmp_resolved_path[MAXPATHLEN];
-	int tmp_resolved_path_len;
-	BY_HANDLE_FILE_INFORMATION info;
-	realpath_cache_bucket *bucket;
-
-	if (!*t) {
-		*t = time(0);
-	}
-
-	if (CWDG(realpath_cache_size_limit) && (bucket = realpath_cache_find(path, len, *t)) != NULL) {
-		memcpy(path, bucket->realpath, bucket->realpath_len + 1);
-		return bucket->realpath_len;
-	}
-
-	if (!php_win32_ioutil_realpath_ex0(path, tmp_resolved_path, &info)) {
-		DWORD err = GetLastError();
-		SET_ERRNO_FROM_WIN32_CODE(err);
-		return (size_t)-1;
-	}
-
-	tmp_resolved_path_len = strlen(tmp_resolved_path);
-	if (CWDG(realpath_cache_size_limit)) {
-		realpath_cache_add(path, len, tmp_resolved_path, tmp_resolved_path_len, info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY, *t);
-	}
-	memmove(path, tmp_resolved_path, tmp_resolved_path_len + 1);
-
-	return tmp_resolved_path_len;
-}
-/* }}} */
-#endif
-
 /* Resolve path relatively to state and put the real path into state */
 /* returns 0 for ok, 1 for error */
 CWD_API int virtual_file_ex(cwd_state *state, const char *path, verify_path_func verify_path, int use_realpath) /* {{{ */
@@ -1368,27 +1334,7 @@ CWD_API int virtual_file_ex(cwd_state *state, const char *path, verify_path_func
 
 	add_slash = (use_realpath != CWD_REALPATH) && path_length > 0 && IS_SLASH(resolved_path[path_length-1]);
 	t = CWDG(realpath_cache_ttl) ? 0 : -1;
-#ifdef ZEND_WIN32
-	if (CWD_EXPAND != use_realpath) {
-		size_t tmp_len = tsrm_win32_realpath_quick(resolved_path, path_length, &t);
-		if ((size_t)-1 != tmp_len) {
-			path_length = tmp_len;
-		} else {
-			DWORD err = GetLastError();
-			/* The access denied error can mean something completely else,
-				fallback to complicated way. */
-			if (CWD_REALPATH == use_realpath && ERROR_ACCESS_DENIED != err) {
-				SET_ERRNO_FROM_WIN32_CODE(err);
-				return 1;
-			}
-			path_length = tsrm_realpath_r(resolved_path, start, path_length, &ll, &t, use_realpath, 0, NULL);
-		}
-	} else {
-		path_length = tsrm_realpath_r(resolved_path, start, path_length, &ll, &t, use_realpath, 0, NULL);
-	}
-#else
 	path_length = tsrm_realpath_r(resolved_path, start, path_length, &ll, &t, use_realpath, 0, NULL);
-#endif
 
 	if (path_length == (size_t)-1) {
 		errno = ENOENT;