[PATCH] shared/shell: don't hook io_hup on non-interactive

[Stimim Chen <stimim@xxxxxxxxxx>]

When we are in non-interactive mode (data.mode == 1), we should not
terminate the mainloop when stdin is disconnected.

For example, in bash, the following command would terminate immediately
without any output.

  : | btmgmt info

---
 src/shared/shell.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/shared/shell.c b/src/shared/shell.c
index 2e094b8f1..d58e2d7d1 100644
--- a/src/shared/shell.c
+++ b/src/shared/shell.c
@@ -1277,10 +1277,10 @@ bool bt_shell_attach(int fd)
 
 	io = io_new(fd);
 
-	if (!data.mode)
+	if (!data.mode) {
 		io_set_read_handler(io, input_read, NULL, NULL);
-
-	io_set_disconnect_handler(io, io_hup, NULL, NULL);
+		io_set_disconnect_handler(io, io_hup, NULL, NULL);
+	}
 
 	data.input = io;
 
-- 
2.27.0.rc0.183.gde8f92d652-goog