Also, I don't know what your comment "I am not able to reproduce the method of getting a user name" means. There are other ways to have user's introduced into the system than `adduser`. My specific example are users delivered from Windows Active Directory using Samba and Winbind. In this case, \ is used as a separator between the user name and realm/domain component.
Also, I don't know what your comment "I am not able to reproduce the method of getting a user name" means. There are other ways to have user's introduced into the system than `adduser`. My specific example are users delivered from Windows Active Directory using Samba and Winbind. In this case, \ is used as a separator between the user name and realm/domain component.