[Qemu-devel] [PATCH] char: disable stdio echo on resume from suspend.

[Gal Hammer <ghammer@redhat.com>]

The monitor's auto-completion feature stopped working when stdio is used
as an input and qemu was resumed after it was suspended (using ctrl-z).

Signed-off-by: Gal Hammer <ghammer@redhat.com>
---
 qemu-char.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/qemu-char.c b/qemu-char.c
index ef84b53..786df33 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -1113,12 +1113,22 @@ static int old_fd0_flags;
 static bool stdio_in_use;
 static bool stdio_allow_signal;
 
+static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo);
+
 static void term_exit(void)
 {
     tcsetattr (0, TCSANOW, &oldtty);
     fcntl(0, F_SETFL, old_fd0_flags);
 }
 
+static void term_stdio_handler(int sig)
+{
+    if (sig == SIGCONT) {
+        /* echo should be off after resume from suspend. */
+        qemu_chr_set_echo_stdio(NULL, false);
+    }
+}
+
 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
 {
     struct termios tty;
@@ -1165,6 +1175,7 @@ static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
     tcgetattr(0, &oldtty);
     qemu_set_nonblock(0);
     atexit(term_exit);
+    signal(SIGCONT, term_stdio_handler);
 
     chr = qemu_chr_open_fd(0, 1);
     chr->chr_close = qemu_chr_close_stdio;
-- 
2.1.0