[Qemu-devel] [PATCH v3 20/21] qemu-io: Make filename optional

[Max Reitz <mreitz@redhat.com>]

Giving a filename is actually not essential, since it can be specified
through the options as well - on the contrary: Sometimes a filename must
not be given.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 qemu-io.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/qemu-io.c b/qemu-io.c
index f180813..a0e0e22 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -160,11 +160,13 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
         flags |= BDRV_O_RDWR;
     }
 
-    if (optind != argc - 1) {
+    if (optind == argc - 1) {
+        return openfile(argv[optind], flags, growable, opts);
+    } else if (optind == argc) {
+        return openfile(NULL, flags, growable, opts);
+    } else {
         return qemuio_command_usage(&open_cmd);
     }
-
-    return openfile(argv[optind], flags, growable, opts);
 }
 
 static int quit_f(BlockDriverState *bs, int argc, char **argv)
-- 
1.8.5.1