qemu-io: Support multiple -o in open command

Instead of ignoring all option values but the last one, multiple -o
options now have the same meaning as having a single option with all
settings in the order of their respective -o options.

Same as commit 2dc8328 for qemu-img convert, except here we do it with
QemuOpts rather than QEMUOptionParameter.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

diff --git a/qemu-io.c b/qemu-io.c
index 9fcd72b..ef3fef6 100644 (file)
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -118,6 +118,7 @@ static const cmdinfo_t open_cmd = {
 
 static QemuOptsList empty_opts = {
     .name = "drive",
+    .merge_lists = true,
     .head = QTAILQ_HEAD_INITIALIZER(empty_opts.head),
     .desc = {
         /* no elements => accept any params */
@@ -132,7 +133,7 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
     int growable = 0;
     int c;
     QemuOpts *qopts;
-    QDict *opts = NULL;
+    QDict *opts;
 
     while ((c = getopt(argc, argv, "snrgo:")) != EOF) {
         switch (c) {
@@ -149,15 +150,14 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
             growable = 1;
             break;
         case 'o':
-            qopts = qemu_opts_parse(&empty_opts, optarg, 0);
-            if (qopts == NULL) {
+            if (!qemu_opts_parse(&empty_opts, optarg, 0)) {
                 printf("could not parse option list -- %s\n", optarg);
+                qemu_opts_reset(&empty_opts);
                 return 0;
             }
-            opts = qemu_opts_to_qdict(qopts, opts);
-            qemu_opts_del(qopts);
             break;
         default:
+            qemu_opts_reset(&empty_opts);
             return qemuio_command_usage(&open_cmd);
         }
     }
@@ -166,6 +166,10 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
         flags |= BDRV_O_RDWR;
     }
 
+    qopts = qemu_opts_find(&empty_opts, NULL);
+    opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
+    qemu_opts_reset(&empty_opts);
+
     if (optind == argc - 1) {
         return openfile(argv[optind], flags, growable, opts);
     } else if (optind == argc) {