discover: Change parsers to emit resources rather than filenames
[petitboot] / discover / paths.c
index ef8a45f924c8fa658fd4c39330f40eaf485761b4..d95e359e9f170b6a69e925a9002bdbe512818ec3 100644 (file)
 
 #define DEVICE_MOUNT_BASE (LOCAL_STATE_DIR "/petitboot/mnt")
 
-struct mount_map {
-       char *dev, *mnt;
-};
-
-static struct mount_map *mount_map;
-static int mount_map_size;
-
-static int is_prefix(const char *str, const char *prefix)
-{
-       return !strncmp(str, prefix, strlen(prefix));
-}
-
-static int is_prefix_ignorecase(const char *str, const char *prefix)
-{
-       return !strncasecmp(str, prefix, strlen(prefix));
-}
-
 const char *mount_base(void)
 {
        return DEVICE_MOUNT_BASE;
 }
 
-char *encode_label(void *alloc_ctx, const char *label)
-{
-       char *str, *c;
-       unsigned int i;
-
-       /* the label can be expanded by up to four times */
-       str = talloc_size(alloc_ctx, strlen(label) * 4 + 1);
-       c = str;
-
-       for (i = 0; i < strlen(label); i++) {
-
-               if (label[i] == '/' || label[i] == '\\') {
-                       sprintf(c, "\\x%02x", label[i]);
-                       c += 4;
-                       continue;
-               }
-
-               *(c++) = label[i];
-       }
-
-       *c = '\0';
-
-       return str;
-}
-
-char *parse_device_path(void *alloc_ctx,
-               const char *dev_str, const char __attribute__((unused)) *cur_dev)
-{
-       char *dev, *enc;
-
-       if (is_prefix_ignorecase(dev_str, "uuid=")) {
-               dev = talloc_asprintf(alloc_ctx, "/dev/disk/by-uuid/%s",
-                               dev_str + strlen("uuid="));
-               return dev;
-       }
-
-       if (is_prefix_ignorecase(dev_str, "label=")) {
-               enc = encode_label(NULL, dev_str + strlen("label="));
-               dev = talloc_asprintf(alloc_ctx, "/dev/disk/by-label/%s", enc);
-               talloc_free(enc);
-               return dev;
-       }
-
-       /* normalise '/dev/foo' to 'foo' for easy comparisons, we'll expand
-        * back before returning.
-        */
-       if (is_prefix(dev_str, "/dev/"))
-               dev_str += strlen("/dev/");
-
-       return join_paths(alloc_ctx, "/dev", dev_str);
-}
-
-const char *mountpoint_for_device(const char *dev)
-{
-       int i;
-
-       if (is_prefix(dev, "/dev/"))
-               dev += strlen("/dev/");
-
-       /* check existing entries in the map */
-       for (i = 0; i < mount_map_size; i++)
-               if (!strcmp(mount_map[i].dev, dev))
-                       return mount_map[i].mnt;
-
-       /* no existing entry, create a new one */
-       i = mount_map_size++;
-       mount_map = talloc_realloc(NULL, mount_map,
-                       struct mount_map, mount_map_size);
-
-       mount_map[i].dev = talloc_strdup(mount_map, dev);
-       mount_map[i].mnt = join_paths(mount_map, DEVICE_MOUNT_BASE, dev);
-       return mount_map[i].mnt;
-}
-
-char *resolve_path(void *alloc_ctx, const char *path, const char *current_dev)
-{
-       static const char s_file[] = "file://";
-       char *ret;
-       const char *devpath, *sep;
-
-       /* test for urls */
-
-       if (!strncasecmp(path, s_file, sizeof(s_file) - 1))
-               path += sizeof(s_file) - 1;
-       else if (strstr(path, "://"))
-               return talloc_strdup(alloc_ctx, path);
-
-       sep = strchr(path, ':');
-       if (!sep) {
-               devpath = mountpoint_for_device(current_dev);
-               ret = join_paths(alloc_ctx, devpath, path);
-       } else {
-               /* parse just the device name into dev */
-               char *tmp, *dev;
-               tmp = talloc_strndup(NULL, path, sep - path);
-               dev = parse_device_path(NULL, tmp, current_dev);
-
-               devpath = mountpoint_for_device(dev);
-               ret = join_paths(alloc_ctx, devpath, sep + 1);
-
-               talloc_free(dev);
-               talloc_free(tmp);
-       }
-
-       return ret;
-}
-
 char *join_paths(void *alloc_ctx, const char *a, const char *b)
 {
        char *full_path;
@@ -376,10 +252,10 @@ fail:
 }
 
 /**
- * pb_load_file - Loads a (possibly) remote file and returns the local file
+ * load_url - Loads a (possibly) remote URL and returns the local file
  * path.
  * @ctx: The talloc context to associate with the returned string.
- * @remote: The remote file URL.
+ * @URL: The remote file URL.
  * @tempfile: An optional variable pointer to be set when a temporary local
  *  file is created.
  *
@@ -387,9 +263,8 @@ fail:
  * or NULL on error.
  */
 
-char *load_file(void *ctx, const char *remote, unsigned int *tempfile)
+char *load_url(void *ctx, struct pb_url *url, unsigned int *tempfile)
 {
-       struct pb_url *url = pb_url_parse(ctx, remote);
        char *local;
        int tmp = 0;