lineedit: don't fall back to simple line input if tty is in raw mode

Testcase: shell command input after python ^Z should still work

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

1 files changed, 6 insertions, 2 deletions

diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 85643079b..3961b1de3 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -2256,9 +2256,13 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
         INIT_S();
 
         if (tcgetattr(STDIN_FILENO, &initial_settings) < 0
-         || !(initial_settings.c_lflag & ECHO)
+         || (initial_settings.c_lflag & (ECHO|ICANON)) == ICANON
         ) {
-                /* Happens when e.g. stty -echo was run before */
+                /* Happens when e.g. stty -echo was run before.
+                 * But if ICANON is not set, we don't come here.
+                 * (example: interactive python ^Z-backgrounded,
+                 * tty is still in "raw mode").
+                 */
                 parse_and_put_prompt(prompt);
                 /* fflush_all(); - done by parse_and_put_prompt */
                 if (fgets(command, maxsize, stdin) == NULL)