hush: fix exit on syntax error behaviour

input.__promptme is no valid indicator that run_shell should be left.
It should be left on executing the 'exit' builtin which is indicated
by a return code < 0 from parse_stream_outer(). Track this with an extra
variable and use it as a condition to return from an interactive shell.

This fixes the weird behaviour that hush exits (and the user finds itself
in the menu) when a syntax error occured.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 5 insertions, 2 deletions

diff --git a/common/hush.c b/common/hush.c
index bf1d9e6fd7..5969127a91 100644
--- a/common/hush.c
+++ b/common/hush.c
@@ -1853,14 +1853,17 @@ int run_shell(void)
 	int rcode;
 	struct in_str input;
 	struct p_context ctx;
+	int exit = 0;
 
 	do {
 		setup_file_in_str(&input);
 		rcode = parse_stream_outer(&ctx, &input, FLAG_PARSE_SEMICOLON);
-		if (rcode < -1)
+		if (rcode < -1) {
+			exit = 1;
 			rcode = -rcode - 2;
+		}
 		release_context(&ctx);
-	} while (!input.__promptme);
+	} while (!exit);
 
 	return rcode;
 }