fsck.c

   1 #include "cache.h"
   2 #include "object.h"
   3 #include "blob.h"
   4 #include "tree.h"
   5 #include "tree-walk.h"
   6 #include "commit.h"
   7 #include "tag.h"
   8 #include "fsck.h"
   9
  10 static int fsck_walk_tree(struct tree *tree, fsck_walk_func walk, void *data)
  11 {
  12         struct tree_desc desc;
  13         struct name_entry entry;
  14         int res = 0;
  15
  16         if (parse_tree(tree))
  17                 return -1;
  18
  19         init_tree_desc(&desc, tree->buffer, tree->size);
  20         while (tree_entry(&desc, &entry)) {
  21                 int result;
  22
  23                 if (S_ISGITLINK(entry.mode))
  24                         continue;
  25                 if (S_ISDIR(entry.mode))
  26                         result = walk(&lookup_tree(entry.sha1)->object, OBJ_TREE, data);
  27                 else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode))
  28                         result = walk(&lookup_blob(entry.sha1)->object, OBJ_BLOB, data);
  29                 else {
  30                         result = error("in tree %s: entry %s has bad mode %.6o\n",
  31                                         sha1_to_hex(tree->object.sha1), entry.path, entry.mode);
  32                 }
  33                 if (result < 0)
  34                         return result;
  35                 if (!res)
  36                         res = result;
  37         }
  38         return res;
  39 }
  40
  41 static int fsck_walk_commit(struct commit *commit, fsck_walk_func walk, void *data)
  42 {
  43         struct commit_list *parents;
  44         int res;
  45         int result;
  46
  47         if (parse_commit(commit))
  48                 return -1;
  49
  50         result = walk((struct object *)commit->tree, OBJ_TREE, data);
  51         if (result < 0)
  52                 return result;
  53         res = result;
  54
  55         parents = commit->parents;
  56         while (parents) {
  57                 result = walk((struct object *)parents->item, OBJ_COMMIT, data);
  58                 if (result < 0)
  59                         return result;
  60                 if (!res)
  61                         res = result;
  62                 parents = parents->next;
  63         }
  64         return res;
  65 }
  66
  67 static int fsck_walk_tag(struct tag *tag, fsck_walk_func walk, void *data)
  68 {
  69         if (parse_tag(tag))
  70                 return -1;
  71         return walk(tag->tagged, OBJ_ANY, data);
  72 }
  73
  74 int fsck_walk(struct object *obj, fsck_walk_func walk, void *data)
  75 {
  76         if (!obj)
  77                 return -1;
  78         switch (obj->type) {
  79         case OBJ_BLOB:
  80                 return 0;
  81         case OBJ_TREE:
  82                 return fsck_walk_tree((struct tree *)obj, walk, data);
  83         case OBJ_COMMIT:
  84                 return fsck_walk_commit((struct commit *)obj, walk, data);
  85         case OBJ_TAG:
  86                 return fsck_walk_tag((struct tag *)obj, walk, data);
  87         default:
  88                 error("Unknown object type for %s", sha1_to_hex(obj->sha1));
  89                 return -1;
  90         }
  91 }