取得 GSettings 執行檔

1. 在 RHEL/CentOS 6 中使用 firefox 68，出現 GSettings 後端使用記憶體，無法存檔，所以每次在 firefox 開檔存檔的 FileChooser 視窗設定都會回到預設值。

   [dywang@deyu ~]$ firefox 
   GLib-GIO-Message: Using the 'memory' GSettings backend.  
   Your settings will not be saved or shared with other applications.
   

2. 從 CentOS 7 (192.168.122.7) 複製 gsettings 執行檔到 /usr/lib64/firefox/bundled/bin。

   [root@deyu ~]# cd /usr/lib64/firefox/bundled/bin
   [root@deyu bin]# scp 192.168.122.7:/usr/bin/gsettings .
   gsettings                                     100%   24KB  23.8KB/s   00:00    
   

3. 從 CentOS 7 (192.168.122.7) 複製 gsettings 執行檔到 /usr/lib64/firefox/bundled/bin，沒有 libffi.so.6 函式庫。

   [root@deyu bin]# LD_LIBRARY_PATH=/usr/lib64/firefox/bundled/lib64 ./gsettings
   ./gsettings: error while loading shared libraries: libffi.so.6: cannot open 
   shared object file: No such file or directory
   

4. 從 CentOS 7 (192.168.122.7) 同步 libffi.so.6 函式庫到 /usr/lib64/firefox/bundled/lib64。

   [root@deyu bin]# rsync -av 192.168.122.7:/usr/lib64/libffi.so.6* \
   /usr/lib64/firefox/bundled/lib64/
   receiving incremental file list
   libffi.so.6 -> libffi.so.6.0.1
   libffi.so.6.0.1
   
   sent 49 bytes  received 32432 bytes  21654.00 bytes/sec
   total size is 32319  speedup is 1.00
   

5. 可以使用 gsettings 命令了。

   [root@deyu bin]# LD_LIBRARY_PATH=/usr/lib64/firefox/bundled/lib64 ./gsettings Usage:
     gsettings --version
     gsettings [--schemadir SCHEMADIR] COMMAND [ARGS…]
   
   Commands:
     help                      Show this information
     list-schemas              List installed schemas
     list-relocatable-schemas  List relocatable schemas
     list-keys                 List keys in a schema
     list-children             List children of a schema
     list-recursively          List keys and values, recursively
     range                     Queries the range of a key
     describe                  Queries the description of a key
     get                       Get the value of a key
     set                       Set the value of a key
     reset                     Reset the value of a key
     reset-recursively         Reset all values in a given schema
     writable                  Check if a key is writable
     monitor                   Watch for changes
   
   Use “gsettings help COMMAND” to get detailed help.