是否可以使用 gio 从非 GUI 会话修改 GNOME 桌面文件元数据？

Question

使用 GNOME 3.22.2 运行 CentOS 7，我正在尝试编写一个 Ansible 剧本，将图标从 /usr/share/applications 复制到预定义用户的桌面，然后授予可信权限（使用gio set "metadata::trusted" yes）。

当我尝试使用终端会话查看桌面图标的可写属性时gio info -w /home/demo/Desktop/google-chrome.desktop，我得到以下结果：

Settable attributes:
 standard::symlink-target (bytestring)
 time::access (uint64, Keep with file when moved)
 time::access-usec (uint32, Keep with file when moved)
 time::modified (uint64, Copy with file, Keep with file when moved)
 time::modified-usec (uint32, Copy with file, Keep with file when moved)
 unix::gid (uint32, Keep with file when moved)
 unix::mode (uint32, Copy with file, Keep with file when moved)
 unix::uid (uint32, Keep with file when moved)
Writable attribute namespaces:
 xattr (string, Copy with file, Keep with file when moved)
 xattr-sys (string, Keep with file when moved)

因此，当我尝试运行上述gio set命令时，它会失败，gio: Setting attribute metadata::trusted not supported因为无法写入元数据。但是，如果我登录 GUI 会话并从终端运行相同的命令，那么我会看到元数据现在是可写属性：

Settable attributes:
 standard::symlink-target (bytestring)
 time::access (uint64, Keep with file when moved)
 time::access-usec (uint32, Keep with file when moved)
 time::modified (uint64, Copy with file, Keep with file when moved)
 time::modified-usec (uint32, Copy with file, Keep with file when moved)
 unix::gid (uint32, Keep with file when moved)
 unix::mode (uint32, Copy with file, Keep with file when moved)
 unix::uid (uint32, Keep with file when moved)
Writable attribute namespaces:
 metadata (string, Copy with file, Keep with file when moved)
 xattr (string, Copy with file, Keep with file when moved)
 xattr-sys (string, Keep with file when moved)

这意味着该gio set命令可以在 GNOME GUI 会话中运行，但不能在终端会话中运行。我试图弄清楚是否有办法允许终端会话能够修改它（以便我的剧本可以进行此修改）。如果需要的话，我并不反对必须使用不同的脚本语言来做到这一点。

有关信息，当前的 Ansible 剧本部分如下所示：

- name: Make Chrome Launcher Trusted
  shell: gio set /home/demo/Desktop/google-chrome.desktop "metadata::trusted" yes

Answer 1

您需要 dbus，如果您的用户尚未登录，则 dbus 不会运行。您可以使用 dbus-launch 启动 dbus 供 gio 使用：

- name: Make Chrome Launcher Trusted
  shell: dbus-launch gio set /home/demo/Desktop/google-chrome.desktop "metadata::trusted" yes