btrfs-progs: image: more verbose syntax erors for -t and -c

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/btrfs-image.c b/btrfs-image.c
index 3039c0c..953d368 100644 (file)
--- a/btrfs-image.c
+++ b/btrfs-image.c
@@ -2760,13 +2760,19 @@ int main(int argc, char *argv[])
                        break;
                case 't':
                        num_threads = arg_strtou64(optarg);
-                       if (num_threads > 32)
-                               print_usage(1);
+                       if (num_threads > 32) {
+                               error("number of threads out of range: %llu",
+                                       (unsigned long long)num_threads);
+                               return 1;
+                       }
                        break;
                case 'c':
                        compress_level = arg_strtou64(optarg);
-                       if (compress_level > 9)
-                               print_usage(1);
+                       if (compress_level > 9) {
+                               error("compression level out of range: %llu",
+                                       (unsigned long long)compress_level);
+                               return 1;
+                       }
                        break;
                case 'o':
                        old_restore = 1;