rangefs

一种基于 FUSE 的只读文件系统，将文件中的范围映射到单独的文件。

安装

预构建的二进制文件可在 GitHub 发布页面找到。

您也可以使用 cargo 安装它

cargo install rangefs

如果您使用 Nix，您也可以从 NUR 软件包 nur.repos.dcsunset.rangefs 安装。NUR 仓库还提供了一个 NixOS 模块

programs.rangefs = {
  enable = true;
  fileSystems = {
    "/mntpoint" = {
      source = "/src";
      config = [
        {
          name = "dest";
          offset = 32;
          size = 64;
        }
      ];
      extraOptions = [ "allow_other" ];
    };
  };
};

使用方法

将具有范围文件的文件挂载到挂载点

# mount a range as a new file
rangefs --config offset=16:size=16 <file> <mount_point>
# multiple ranges with different names
rangefs -c offset=4:name=range1 -c offset=8:size=8:name=range2 <file> <mount_point>

# unmount
fusermount -u <mount_point>

# To adjust log level and run at foreground
RANGEFS_LOG=debug rangefs -c offset=1:size=1 --foreground <file> <mount_point>

挂载点将是一个只读文件系统，其中包含对应于源文件中指定范围的文件。重复使用 --config 选项来挂载多个范围。

请注意，程序默认在后台运行。使用标志 --foreground 在前台运行它。

如果程序未使用 fusermount 退出，即使在程序退出后，也需要使用 fusermount。您还可以使用 - 选项在程序退出时自动卸载 fs。

/source_file /mount_point fuse./path/to/rangefs nofail,allow_other,config::name=r1:offset=1::name=r2:offset=2:size=2 0 0

rangefs
Copyright (C) 2023-2024  DCsunset

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.