在GNOME 3.22.2上运行CentOS 7，我试图编写Ansible剧本，将图标从/ usr / share / applications复制到预定义用户的桌面，然后授予受信任的权限（使用gio set "metadata::trusted" yes ）。
当我尝试使用gio info -w /home/demo/Desktop/google-chrome.desktop在终端会话中查看桌面图标的可写属性时，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，它无法运行gio: Setting attribute metadata::trusted not supported，因为无法写入元数据。但是，如果我登录到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的属性：
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gio set命令在GNOME GUI会话中有效，但在终端会话中无效。我试图找出是否有办法允许终端会话进行修改（以便我的剧本可以进行修改）。如果这样做的话，我不反对必须使用其他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
答案 0 :(得分：2)
您需要dbus，如果您的用户尚未登录，则该dbus不会运行。您可以使用dbus-launch启动gio使用的dbus：
- name: Make Chrome Launcher Trusted
shell: dbus-launch gio set /home/demo/Desktop/google-chrome.desktop "metadata::trusted" yes