Sync with OpenBSD

CVSROOT: /cvs Module name: src Changes by: [email protected] 2021/07/05 07:41:46 Modified files: bin/ksh : syn.c Log message: Do not permit an empty list between "while" and "do". This avoids a cpu loop for "while do done" and is consistent with the behavior of AT&T ksh and most other shells. OK jca@ halex@
ibara · Jul 5, 2021 · be763a7 · be763a7
1 parent 7a5f8be
commit be763a7
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/syn.c b/syn.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: syn.c,v 1.39 2018/04/24 08:25:16 kn Exp $	*/
+/*	$OpenBSD: syn.c,v 1.40 2021/07/05 13:41:46 millert Exp $	*/
 
 /*
  * shell parser (C version)
@@ -331,6 +331,8 @@ get_command(int cf)
 		nesting_push(&old_nesting, c);
 		t = newtp((c == WHILE) ? TWHILE : TUNTIL);
 		t->left = c_list(true);
+		if (t->left == NULL)
+			syntaxerr(NULL);
 		t->right = dogroup();
 		nesting_pop(&old_nesting);
 		break;