btrfs-progs: convert: Fix offset-by-one error in read_data_extent()

[platform/upstream/btrfs-progs.git] / btrfs-crc.c

diff --git a/btrfs-crc.c b/btrfs-crc.c
index 9e2a01f..c3e4774 100644 (file)
--- a/btrfs-crc.c
+++ b/btrfs-crc.c
@@ -26,10 +26,12 @@ void print_usage(int status)
 {
        printf("usage: btrfs-crc filename\n");
        printf("    print out the btrfs crc for \"filename\"\n");
-       printf("usage: btrfs-crc filename -c crc [-s seed] [-l length]\n");
+       printf("usage: btrfs-crc -c crc [-s seed] [-l length]\n");
        printf("    brute force search for file names with the given crc\n");
        printf("      -s seed    the random seed (default: random)\n");
        printf("      -l length  the length of the file names (default: 10)\n");
+       printf("usage: btrfs-crc -h\n");
+       printf("    print this message\n");
        exit(status);
 }
 
@@ -67,12 +69,14 @@ int main(int argc, char **argv)
        str = argv[optind];
 
        if (!loop) {
-               if (check_argc_min(argc - optind, 1))
+               if (check_argc_exact(argc - optind, 1))
                        print_usage(255);
 
                printf("%12u - %s\n", crc32c(~1, str, strlen(str)), str);
                return 0;
        }
+       if (check_argc_exact(argc - optind, 0))
+               print_usage(255);
 
        buf = malloc(length);
        if (!buf)