btrfs-progs: limit minimal num of args for btrfs-image

The btrfs-image requires at least 2 args to run,
one for the source dev/file, the other for the target dev/file.

This patch depends on patch:
	btrfs-progs: move the check_argc_* functions into utils.c

Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/btrfs-image.c b/btrfs-image.c
index 03cf85e..985aa26 100644 (file)
--- a/btrfs-image.c
+++ b/btrfs-image.c
@@ -2522,6 +2522,10 @@ int main(int argc, char *argv[])
        }
 
        argc = argc - optind;
+       set_argv0(argv);
+       if (check_argc_min(argc, 2))
+               print_usage();
+
        dev_cnt = argc - 1;
 
        if (create) {