workaround symlink check

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/PosixModuleBuiltins.java

@@ -424,8 +424,18 @@ Object stat(String path, boolean followSymlinks) {
             } else if (f.isSymbolicLink()) {
                 mode |= S_IFLNK;
             } else {
-                // TODO: differentiate these
-                mode |= S_IFSOCK | S_IFBLK | S_IFCHR | S_IFIFO;
+                // TODO: remove the additional check for symlink once GR-13265 is fixed
+                TruffleFile canonicalFile = null;
+                try {
+                    canonicalFile = f.getCanonicalFile();
+                } catch (IOException e) {
+                }
+                if (!f.getAbsoluteFile().equals(canonicalFile)) {
+                    mode |= S_IFLNK;
+                } else {
+                    // TODO: differentiate these
+                    mode |= S_IFSOCK | S_IFBLK | S_IFCHR | S_IFIFO;
+                }
             }
             try {
                 mtime = fileTimeToSeconds(f.getLastModifiedTime(linkOptions));