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merge fix from oksh: 

"let --" was crashing ksh; found by phy0@rambler.ru.  Various other expressions
involving ++ and -- also ran into this. Insufficient checks for end of parse in
the tokenizer made it assume that an lvalue had been found
This commit is contained in:
tg 2009-06-08 20:13:07 +00:00
parent 6b2ad96bac
commit bbf00b5d93
1 changed files with 4 additions and 3 deletions
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7
expr.c
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@ -1,4 +1,4 @@
/* $OpenBSD: expr.c,v 1.19 2006/04/10 14:38:59 jaredy Exp $ */
/* $OpenBSD: expr.c,v 1.21 2009/06/01 19:00:57 deraadt Exp $ */
/*-
* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009
@ -22,7 +22,7 @@
#include "sh.h"
__RCSID("$MirOS: src/bin/mksh/expr.c,v 1.27 2009/06/08 20:06:45 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/expr.c,v 1.28 2009/06/08 20:13:07 tg Exp $");
/* The order of these enums is constrained by the order of opinfo[] */
enum token {
@ -592,7 +592,8 @@ do_ppmm(Expr_state *es, enum token op, struct tbl *vasn, bool is_prefix)
static void
assign_check(Expr_state *es, enum token op, struct tbl *vasn)
{
if (vasn->name[0] == '\0' && !(vasn->flag & EXPRLVALUE))
if (es->tok == END ||
(vasn->name[0] == '\0' && !(vasn->flag & EXPRLVALUE)))
evalerr(es, ET_LVALUE, opinfo[(int)op].name);
else if (vasn->flag & RDONLY)
evalerr(es, ET_RDONLY, opinfo[(int)op].name);