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From f8d17c68e5d3f5b526968a4790a14681fdc69ecd Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Fri, 14 Dec 2018 08:26:38 +0000
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Subject: [PATCH 1/5] ui: add qapi parser for -display
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Gerd Hoffmann <kraxel@redhat.com>
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Message-id: <20181214082642.21878-2-kraxel@redhat.com>
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Patchwork-id: 83507
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O-Subject: [RHEL8/rhel qemu-kvm PATCH 1/5] ui: add qapi parser for -display
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Bugzilla: 1652871
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RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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RH-Acked-by: Daniel P. Berrange <berrange@redhat.com>
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RH-Acked-by: Erik Skultety <eskultet@redhat.com>
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Add parse_display_qapi() function which parses the -display command line
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using a qapi visitor for DisplayOptions.  Wire up as default catch in
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parse_display().
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Improves the error message for unknown display types.
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Also enables json as -display argument, i.e. -display "{ 'type': 'gtk' }"
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Message-id: 20180507095539.19584-2-kraxel@redhat.com
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(cherry picked from commit 776d1344bd0566f412d5bc063e753a6b98530bcf)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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 vl.c | 24 ++++++++++++++++++++++--
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 1 file changed, 22 insertions(+), 2 deletions(-)
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diff --git a/vl.c b/vl.c
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index 74fa8f2..934e402 100644
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--- a/vl.c
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+++ b/vl.c
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@@ -120,12 +120,14 @@ int main(int argc, char **argv)
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 #include "ui/qemu-spice.h"
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 #include "qapi/string-input-visitor.h"
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 #include "qapi/opts-visitor.h"
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+#include "qapi/clone-visitor.h"
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 #include "qom/object_interfaces.h"
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 #include "exec/semihost.h"
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 #include "crypto/init.h"
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 #include "sysemu/replay.h"
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 #include "qapi/qapi-events-run-state.h"
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 #include "qapi/qapi-visit-block-core.h"
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+#include "qapi/qapi-visit-ui.h"
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 #include "qapi/qapi-commands-block-core.h"
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 #include "qapi/qapi-commands-misc.h"
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 #include "qapi/qapi-commands-run-state.h"
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@@ -2117,6 +2119,25 @@ static void select_vgahw(const char *p)
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     }
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 }
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+static void parse_display_qapi(const char *optarg)
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+{
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+    Error *err = NULL;
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+    DisplayOptions *opts;
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+    Visitor *v;
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+
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+    v = qobject_input_visitor_new_str(optarg, "type", &err;;
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+    if (!v) {
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+        error_report_err(err);
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+        exit(1);
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+    }
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+
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+    visit_type_DisplayOptions(v, NULL, &opts, &error_fatal);
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+    QAPI_CLONE_MEMBERS(DisplayOptions, &dpy, opts);
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+
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+    qapi_free_DisplayOptions(opts);
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+    visit_free(v);
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+}
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+
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 static void parse_display(const char *p)
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 {
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     const char *opts;
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@@ -2228,8 +2249,7 @@ static void parse_display(const char *p)
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     } else if (strstart(p, "none", &opts)) {
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         dpy.type = DISPLAY_TYPE_NONE;
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     } else {
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-        error_report("unknown display type");
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-        exit(1);
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+        parse_display_qapi(p);
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     }
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 }
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-- 
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1.8.3.1
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