hush: fix a corner case of empty "do \n done" structure
The structure is:
while cmd; do
done
bash doesn't accept it at all. We were accepting it but execution
was buggy.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/hush.c b/shell/hush.c
index c3a4afb..c7971b0 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -7498,7 +7498,10 @@
#endif
#if ENABLE_HUSH_LOOPS
/* Beware of "while false; true; do ..."! */
- if (pi->next && pi->next->res_word == RES_DO) {
+ if (pi->next
+ && (pi->next->res_word == RES_DO || pi->next->res_word == RES_DONE)
+ /* (the second check above is needed for "while ...; do \n done" case) */
+ ) {
if (rword == RES_WHILE) {
if (rcode) {
/* "while false; do...done" - exitcode 0 */