fsck-cache.c

   1 #include <sys/types.h>
   2 #include <dirent.h>
   3
   4 #include "cache.h"
   5 #include "commit.h"
   6 #include "tree.h"
   7 #include "blob.h"
   8 #include "tag.h"
   9
  10 #define REACHABLE 0x0001
  11
  12 static int show_root = 0;
  13 static int show_tags = 0;
  14 static int show_unreachable = 0;
  15 static unsigned char head_sha1[20];
  16
  17 static void check_connectivity(void)
  18 {
  19         int i;
  20
  21         /* Look up all the requirements, warn about missing objects.. */
  22         for (i = 0; i < nr_objs; i++) {
  23                 struct object *obj = objs[i];
  24                 struct object_list *refs;
  25
  26                 if (show_unreachable && !(obj->flags & REACHABLE)) {
  27                         printf("unreachable %s %s\n", obj->type, sha1_to_hex(obj->sha1));
  28                         continue;
  29                 }
  30
  31                 if (!obj->parsed) {
  32                         printf("missing %s %s\n", obj->type,
  33                                sha1_to_hex(obj->sha1));
  34                 }
  35                 if (!obj->used) {
  36                         printf("dangling %s %s\n", obj->type,
  37                                sha1_to_hex(obj->sha1));
  38                 }
  39                 for (refs = obj->refs; refs; refs = refs->next) {
  40                         if (!refs->item->parsed) {
  41                                 printf("broken link from %s\n",
  42                                        sha1_to_hex(obj->sha1));
  43                                 printf("              to %s\n",
  44                                        sha1_to_hex(refs->item->sha1));
  45                         }
  46                 }
  47         }
  48 }
  49
  50 static int fsck_tree(struct tree *item)
  51 {
  52         if (item->has_full_path) {
  53                 fprintf(stderr, "warning: fsck-cache: tree %s "
  54                         "has full pathnames in it\n",
  55                         sha1_to_hex(item->object.sha1));
  56         }
  57         return 0;
  58 }
  59
  60 static int fsck_commit(struct commit *commit)
  61 {
  62         if (!commit->tree)
  63                 return -1;
  64         if (!commit->parents && show_root)
  65                 printf("root %s\n", sha1_to_hex(commit->object.sha1));
  66         if (!commit->date)
  67                 printf("bad commit date in %s\n",
  68                        sha1_to_hex(commit->object.sha1));
  69         return 0;
  70 }
  71
  72 static int fsck_tag(struct tag *tag)
  73 {
  74         if (!show_tags)
  75                 return 0;
  76
  77         printf("tagged %s %s",
  78                tag->tagged->type,
  79                sha1_to_hex(tag->tagged->sha1));
  80         printf(" (%s) in %s\n",
  81                tag->tag, sha1_to_hex(tag->object.sha1));
  82         return 0;
  83 }
  84
  85 static int fsck_name(char *hex)
  86 {
  87         unsigned char sha1[20];
  88         if (!get_sha1_hex(hex, sha1)) {
  89                 struct object *obj = parse_object(sha1);
  90                 if (!obj)
  91                         return -1;
  92                 if (obj->type == blob_type)
  93                         return 0;
  94                 if (obj->type == tree_type)
  95                         return fsck_tree((struct tree *) obj);
  96                 if (obj->type == commit_type)
  97                         return fsck_commit((struct commit *) obj);
  98                 if (obj->type == tag_type)
  99                         return fsck_tag((struct tag *) obj);
 100         }
 101         return -1;
 102 }
 103
 104 static int fsck_dir(int i, char *path)
 105 {
 106         DIR *dir = opendir(path);
 107         struct dirent *de;
 108
 109         if (!dir) {
 110                 return error("missing sha1 directory '%s'", path);
 111         }
 112
 113         while ((de = readdir(dir)) != NULL) {
 114                 char name[100];
 115                 int len = strlen(de->d_name);
 116
 117                 switch (len) {
 118                 case 2:
 119                         if (de->d_name[1] != '.')
 120                                 break;
 121                 case 1:
 122                         if (de->d_name[0] != '.')
 123                                 break;
 124                         continue;
 125                 case 38:
 126                         sprintf(name, "%02x", i);
 127                         memcpy(name+2, de->d_name, len+1);
 128                         if (!fsck_name(name))
 129                                 continue;
 130                 }
 131                 fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
 132         }
 133         closedir(dir);
 134         return 0;
 135 }
 136
 137 int main(int argc, char **argv)
 138 {
 139         int i, heads;
 140         char *sha1_dir;
 141
 142         for (i = 1; i < argc; i++) {
 143                 const char *arg = argv[i];
 144
 145                 if (!strcmp(arg, "--unreachable")) {
 146                         show_unreachable = 1;
 147                         continue;
 148                 }
 149                 if (!strcmp(arg, "--tags")) {
 150                         show_tags = 1;
 151                         continue;
 152                 }
 153                 if (!strcmp(arg, "--root")) {
 154                         show_root = 1;
 155                         continue;
 156                 }
 157                 if (*arg == '-')
 158                         usage("fsck-cache [--tags] [[--unreachable] <head-sha1>*]");
 159         }
 160
 161         sha1_dir = getenv(DB_ENVIRONMENT) ? : DEFAULT_DB_ENVIRONMENT;
 162         for (i = 0; i < 256; i++) {
 163                 static char dir[4096];
 164                 sprintf(dir, "%s/%02x", sha1_dir, i);
 165                 fsck_dir(i, dir);
 166         }
 167
 168         heads = 0;
 169         for (i = 1; i < argc; i++) {
 170                 const char *arg = argv[i];
 171
 172                 if (*arg == '-')
 173                         continue;
 174
 175                 if (!get_sha1_hex(arg, head_sha1)) {
 176                         struct commit *commit = lookup_commit(head_sha1);
 177                         struct object *obj;
 178
 179                         /* Error is printed by lookup_commit(). */
 180                         if (!commit)
 181                                 continue;
 182
 183                         obj = &commit->object;
 184                         obj->used = 1;
 185                         mark_reachable(obj, REACHABLE);
 186                         heads++;
 187                         continue;
 188                 }
 189                 error("expected sha1, got %s", arg);
 190         }
 191
 192         if (!heads) {
 193                 if (show_unreachable) {
 194                         fprintf(stderr, "unable to do reachability without a head\n");
 195                         show_unreachable = 0;
 196                 }
 197                 fprintf(stderr, "expect dangling commits - potential heads - due to lack of head information\n");
 198         }
 199
 200         check_connectivity();
 201         return 0;
 202 }