--- researchv9/libc/gen/opendir.c	2018/04/24 17:22:00	1.1.1.1
+++ researchv9/libc/gen/opendir.c	2018/04/24 17:35:46	1.1.1.2
@@ -15,6 +15,7 @@ char *name;
 {	int i;
 	register DIR *dirp;
 	register char *p;
+	struct stat st;
 
 	dirp = (DIR *)malloc(sizeof(DIR));
 	if(!dirp)
@@ -45,16 +46,24 @@ char *name;
 	p = dirp->dd_buf;
 	if(p[8] != '.') {
 old:
-		dirp->dd_type = TOLD;
+		if (fstat(dirp->dd_fd, &st) < 0) {
+			close(dirp->dd_fd);
+			free(dirp);
+			return(0);
+		}
+		if (st.st_ino == *(ino_t *)dirp->dd_buf)
+			dirp->dd_type = TOLD;
+		else
+			dirp->dd_type = TOLDSWAP;
 		return(dirp);
 	}
 	if(p[20] == '.' && p[21] == '.') {	/* bsd-like or bogus */
-		if(p[4] == 0 && p[5] == 12) {
-			dirp->dd_type = TSUN;
+		if(*(short *)&p[4] == 0x000c) {
+			dirp->dd_type = TBSD;
 			return(dirp);
 		}
-		if(p[4] == 12 && p[5] == 0) {
-			dirp->dd_type = TBSD;
+		if(*(short *)&p[4] == 0x0c00) {
+			dirp->dd_type = TBSDSWAP;
 			return(dirp);
 		}
 		dirp->dd_type = TUNK;