[07/17] chardev: add stdio support to qapi

diff --git a/qapi-schema.json b/qapi-schema.json
index 5dcfbfe..77d4153 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3196,6 +3196,19 @@ 
 { 'type': 'ChardevMux', 'data': { 'chardev' : 'str' } }
 
 ##
+# @ChardevStdio:
+#
+# Configuration info for stdio chardevs.
+#
+# @signal: #optional Allow signals (such as SIGINT triggered by ^C)
+#          be delivered to qemu.  Default: true in -nographic mode,
+#          false otherwise.
+#
+# Since: 1.5
+##
+{ 'type': 'ChardevStdio', 'data': { '*signal' : 'bool' } }
+
+##
 # @ChardevBackend:
 #
 # Configuration info for the new chardev backend.
@@ -3212,7 +3225,8 @@ 
                                        'null'   : 'ChardevDummy',
                                        'mux'    : 'ChardevMux',
                                        'msmouse': 'ChardevDummy',
-                                       'braille': 'ChardevDummy' } }
+                                       'braille': 'ChardevDummy',
+                                       'stdio'  : 'ChardevStdio' } }
 
 ##
 # @ChardevReturn:
diff --git a/qemu-char.c b/qemu-char.c
index 180fffe..93ed49f 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -753,7 +753,7 @@  static void qemu_chr_close_stdio(struct CharDriverState *chr)
     fd_chr_close(chr);
 }
 
-static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
+static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
 {
     CharDriverState *chr;
 
@@ -776,8 +776,10 @@  static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
     chr->chr_set_echo = qemu_chr_set_echo_stdio;
     qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
     stdio_nb_clients++;
-    stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
-                                           display_type != DT_NOGRAPHIC);
+    stdio_allow_signal = display_type != DT_NOGRAPHIC;
+    if (opts->has_signal) {
+        stdio_allow_signal = opts->signal;
+    }
     qemu_chr_fe_set_echo(chr, false);
 
     return chr;
@@ -1928,7 +1930,7 @@  static void win_stdio_close(CharDriverState *chr)
     stdio_nb_clients--;
 }
 
-static CharDriverState *qemu_chr_open_win_stdio(QemuOpts *opts)
+static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
 {
     CharDriverState   *chr;
     WinStdioCharState *stdio;
@@ -2959,6 +2961,15 @@  static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
     backend->file->out = g_strdup(path);
 }
 
+static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
+                                 Error **errp)
+{
+    backend->stdio = g_new0(ChardevStdio, 1);
+    backend->stdio->has_signal = true;
+    backend->stdio->signal =
+        qemu_opt_get_bool(opts, "signal", display_type != DT_NOGRAPHIC);
+}
+
 static const struct {
     const char *name;
     /* old, pre qapi */
@@ -2975,14 +2986,14 @@  static const struct {
     { .name = "memory",    .open = qemu_chr_open_ringbuf },
     { .name = "file",      .kind  = CHARDEV_BACKEND_KIND_FILE,
                            .parse = qemu_chr_parse_file_out },
+    { .name = "stdio",     .kind  = CHARDEV_BACKEND_KIND_STDIO,
+                           .parse = qemu_chr_parse_stdio },
 #ifdef _WIN32
     { .name = "pipe",      .open = qemu_chr_open_win_pipe },
     { .name = "console",   .open = qemu_chr_open_win_con },
     { .name = "serial",    .open = qemu_chr_open_win },
-    { .name = "stdio",     .open = qemu_chr_open_win_stdio },
 #else
     { .name = "pipe",      .open = qemu_chr_open_pipe },
-    { .name = "stdio",     .open = qemu_chr_open_stdio },
 #endif
     { .name = "braille",   .kind  = CHARDEV_BACKEND_KIND_BRAILLE },
 #ifdef HAVE_CHARDEV_TTY
@@ -3470,6 +3481,9 @@  ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
         chr = chr_baum_init();
         break;
 #endif
+    case CHARDEV_BACKEND_KIND_STDIO:
+        chr = qemu_chr_open_stdio(backend->stdio);
+        break;
     default:
         error_setg(errp, "unknown chardev backend (%d)", backend->kind);
         break;