g_file_copy function sets symbolic link's permission if source file is copied by symbolic link.
CVE:
CVE-2009-3289 (The g_file_copy function in glib 2.0 sets the permissions of a target file to the permissions of a symbolic link (777), which allows user-assisted local users to modify files of other users, as demonstrated by using Nautilus to modify the permissions of the user home directory.)
