Check that the mode argument to fsdb's `chmod' command contains no

inode type bits set. Previously it would let you set IFMT bits (but
not clear them). The `chtype' command should be be used instead
for changing the inode type; having chmod half-work only causes
confusion.

sbin/fsdb/fsdb.c

@@ -669,7 +669,7 @@ CMDFUNCSTART(chmode)
 	return 1;
 
     modebits = strtol(argv[1], &cp, 8);
-    if (cp == argv[1] || *cp != '\0' ) { 
+    if (cp == argv[1] || *cp != '\0' || (modebits & ~07777)) { 
 	warnx("bad modebits `%s'", argv[1]);
 	return 1;
     }