libbb: fix bb_ask() to flush input before prompt, not after. Closes 7190

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

1 files changed, 4 insertions, 1 deletions

diff --git a/libbb/bb_askpass.c b/libbb/bb_askpass.c
index 77c1bcd95..1927ba9e9 100644
--- a/libbb/bb_askpass.c
+++ b/libbb/bb_askpass.c
@@ -30,9 +30,12 @@ char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
         struct sigaction sa, oldsa;
         struct termios tio, oldtio;
 
+        tcflush(fd, TCIFLUSH);
+        /* Was buggy: was printing prompt *before* flushing input,
+         * which was upsetting "expect" based scripts of some users.
+         */
         fputs(prompt, stdout);
         fflush_all();
-        tcflush(fd, TCIFLUSH);
 
         tcgetattr(fd, &oldtio);
         tio = oldtio;