link: don't allow superuser to link to directories

diff --git a/Kernel/syscall_fs3.c b/Kernel/syscall_fs3.c
index c7c8141..b840496 100644 (file)
--- a/Kernel/syscall_fs3.c
+++ b/Kernel/syscall_fs3.c
@@ -178,8 +178,10 @@ arg_t _link(void)
        if (!(ino = n_open(name1, NULLINOPTR)))
                return (-1);
 
-       if (getmode(ino) == MODE_R(F_DIR))
+       if (getmode(ino) == MODE_R(F_DIR)) {
+               udata.u_error = EISDIR;
                goto nogood;
+       }
 
        if (ino->c_node.i_nlink == 0xFFFF) {
                udata.u_error = EMLINK;