btrfs-progs: receive: implement the update_extent callback

[platform/upstream/btrfs-progs.git] / btrfs-find-root.c

diff --git a/btrfs-find-root.c b/btrfs-find-root.c
index 9e56c81..1cb3085 100644 (file)
--- a/btrfs-find-root.c
+++ b/btrfs-find-root.c
@@ -22,6 +22,8 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <zlib.h>
+#include <getopt.h>
+
 #include "kerncompat.h"
 #include "ctree.h"
 #include "disk-io.h"
@@ -142,15 +144,23 @@ int main(int argc, char **argv)
        struct btrfs_find_root_filter filter = {0};
        struct cache_tree result;
        struct cache_extent *found;
-       int opt;
        int ret;
 
        /* Default to search root tree */
        filter.objectid = BTRFS_ROOT_TREE_OBJECTID;
        filter.match_gen = (u64)-1;
        filter.match_level = (u8)-1;
-       while ((opt = getopt(argc, argv, "al:o:g:")) != -1) {
-               switch(opt) {
+       while (1) {
+               static const struct option long_options[] = {
+                       { "help", no_argument, NULL, GETOPT_VAL_HELP},
+                       { NULL, 0, NULL, 0 }
+               };
+               int c = getopt_long(argc, argv, "al:o:g:", long_options, NULL);
+
+               if (c < 0)
+                       break;
+
+               switch (c) {
                case 'a':
                        filter.search_all = 1;
                        break;
@@ -163,9 +173,10 @@ int main(int argc, char **argv)
                case 'l':
                        filter.level = arg_strtou64(optarg);
                        break;
+               case GETOPT_VAL_HELP:
                default:
                        usage();
-                       exit(1);
+                       exit(c != GETOPT_VAL_HELP);
                }
        }