/ d root root rwxr-xr-x 0 
//1.txt f user1 users rwxr-xr-x 0 
//dir d root root rwxr-xr-x 0 
//dir/1.txt f user1 users rwxrwxrwx 1 
//dir/for-all-users d user1 users rwxrwxrwx 0 
//dir/only-for-user1 d user1 users rwx------ 0 
//dir/only-user1-write.txt f user1 users rwxr-xr-x 0 123456
//dir/subdir d root root rwxr-xr-x 0 
//dir/subdir/1.txt f root root rwxr-xr-x 0 
//only-user1-write.txt f user1 users rwxr-xr-x 0 
//root d root root rwx------ 0 
//test d user1 users rwxr-xr-x 0 
//user1 d user1 users rwxr-xr-x 0 
//user1/1.txt f user1 users rwxr-xr-x 0