btrfs-progs: restore: don't allow users to specify -r and -f at the same time

These two options are used for same purpose, but they are exclusive with
each other. Make it clear to common users.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/cmds-restore.c b/cmds-restore.c
index afcb347..310a84e 100644 (file)
--- a/cmds-restore.c
+++ b/cmds-restore.c
@@ -1218,6 +1218,11 @@ int cmd_restore(int argc, char **argv)
        else if (list_roots && optind >= argc)
                usage(cmd_restore_usage);
 
+       if (fs_location && root_objectid) {
+               fprintf(stderr, "don't use -f and -r at the same time.\n");
+               return 1;
+       }
+
        if ((ret = check_mounted(argv[optind])) < 0) {
                fprintf(stderr, "Could not check mount status: %s\n",
                        strerror(-ret));