* Peter Hurley | 2014-09-25 07:31:32 [-0400]:
>I just verified that GNU readline6 uses ioctl(TCSETSW, ...) to do the set_termios
>(which is the ioctl that libc should use for tcsetattr(TCSADRAIN)).
>
>Maybe this userspace is using a readline()-alike that has a bug by not using the
>correct tcsetattr() action?
set_termios() has an opt argument. While doing ":n" in vi I see two invocations
with "opt == 8" which stands for TCSETS.
browsing through vi's code I stumbled upon
|static void rawmode(void)
|{
…
| tcsetattr_stdin_TCSANOW(&term_vi);
|}
|int FAST_FUNC tcsetattr_stdin_TCSANOW(const struct termios *tp)
|{
| return tcsetattr(STDIN_FILENO, TCSANOW, tp);
|}
and this is probably what you meant. There is also
| static void cookmode(void)
| {
| fflush_all();
| tcsetattr_stdin_TCSANOW(&term_orig);
| }
However I don't see __tty_perform_flush() in kernel invoked.
>Or maybe the glibc-equivalent has the bug, and tcsetattr(TCSADRAIN) is not using
>ioctl(TCSETSW)?
libc is "GNU C Library 2.20".
>Regards,
>Peter Hurley
Sebastian
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