read_key: drop optimization where we read 3 bytes at once
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index a0b1bcf..81f6fde 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -1451,10 +1451,13 @@
pfd.events = POLLIN;
do {
poll_again:
- /* Wait for input. Can't just call read_key, it will return
- * at once if stdin is in non-blocking mode. */
- safe_poll(&pfd, 1, -1);
- /* note: read_key sets errno to 0 on success: */
+ if (read_key_buffer[0] == 0) {
+ /* Wait for input. Can't just call read_key,
+ * it returns at once if stdin
+ * is in non-blocking mode. */
+ safe_poll(&pfd, 1, -1);
+ }
+ /* Note: read_key sets errno to 0 on success: */
ic = read_key(STDIN_FILENO, read_key_buffer);
if (ENABLE_FEATURE_EDITING_ASK_TERMINAL
&& (int32_t)ic == KEYCODE_CURSOR_POS