shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256

function                                             old     new   delta
record_pending_signo                                  32      63     +31
lineedit_read_key                                    231     224      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 31/-7)              Total: 24 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/shell/ash.c b/shell/ash.c
index 18ccc1329..5f8c8ea19 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -10821,7 +10821,8 @@ preadfd(void)
  again:
                 /* For shell, LI_INTERRUPTIBLE is set:
                  * read_line_input will abort on either
-                 * getting EINTR in poll(), or if it sees bb_got_signal != 0
+                 * getting EINTR in poll() and bb_got_signal became != 0,
+                 * or if it sees bb_got_signal != 0
                  * (IOW: if signal arrives before poll() is reached).
                  * Interactive testcases:
                  * (while kill -INT $$; do sleep 1; done) &