QemuOpts: command line switches for the config file.
Adds -readconfig and -writeconfig command line switches to read/write
QemuOpts from config file.
In theory you should be able to do:
qemu < machine config cmd line switches here > -writeconfig vm.cfg
qemu -readconfig vm.cfg
In practice it will not work. Not all command line switches are
converted to QemuOpts, so you'll have to keep the not-yet converted ones
on the second line. Also there might be bugs lurking which prevent even
the converted ones from working correctly.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/vl.c b/vl.c
index 402e78d..bf91ee1 100644
--- a/vl.c
+++ b/vl.c
@@ -5364,6 +5364,36 @@
xen_mode = XEN_ATTACH;
break;
#endif
+ case QEMU_OPTION_readconfig:
+ {
+ FILE *fp;
+ fp = fopen(optarg, "r");
+ if (fp == NULL) {
+ fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
+ exit(1);
+ }
+ if (qemu_config_parse(fp) != 0) {
+ exit(1);
+ }
+ fclose(fp);
+ break;
+ }
+ case QEMU_OPTION_writeconfig:
+ {
+ FILE *fp;
+ if (strcmp(optarg, "-") == 0) {
+ fp = stdout;
+ } else {
+ fp = fopen(optarg, "w");
+ if (fp == NULL) {
+ fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
+ exit(1);
+ }
+ }
+ qemu_config_write(fp);
+ fclose(fp);
+ break;
+ }
}
}
}
