QemuOpts: add -set option
One use case will be file for drives (no filename quoting issues), i.e.
-drive id=test,if=virtio
-set drive.test.file=/vmdisk/test-virtio.img
It will work for any other option (assuming handled by QemuOpts) though.
Except for id= for obvious reasons ;).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-Id:
diff --git a/qemu-config.c b/qemu-config.c
index 786f055..bcfb6eb 100644
--- a/qemu-config.c
+++ b/qemu-config.c
@@ -71,3 +71,44 @@
},
};
+static QemuOptsList *lists[] = {
+ &qemu_drive_opts,
+ NULL,
+};
+
+int qemu_set_option(const char *str)
+{
+ char group[64], id[64], arg[64];
+ QemuOpts *opts;
+ int i, rc, offset;
+
+ rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
+ if (rc < 3 || str[offset] != '=') {
+ fprintf(stderr, "can't parse: \"%s\"\n", str);
+ return -1;
+ }
+
+ for (i = 0; lists[i] != NULL; i++) {
+ if (strcmp(lists[i]->name, group) == 0)
+ break;
+ }
+ if (lists[i] == NULL) {
+ fprintf(stderr, "there is no option group \"%s\"\n", group);
+ return -1;
+ }
+
+ opts = qemu_opts_find(lists[i], id);
+ if (!opts) {
+ fprintf(stderr, "there is no %s \"%s\" defined\n",
+ lists[i]->name, id);
+ return -1;
+ }
+
+ if (-1 == qemu_opt_set(opts, arg, str+offset+1)) {
+ fprintf(stderr, "failed to set \"%s\" for %s \"%s\"\n",
+ arg, lists[i]->name, id);
+ return -1;
+ }
+ return 0;
+}
+