-^\w{3} [ :0-9]{11} [._[:alnum:]-]+ smbd: pam_unix\(samba:session\): session opened for user
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ smbd: pam_unix\(samba:session\): session closed for user
+^\w{3} [ :0-9]{11} [._[:alnum:]-]+ smbd: pam_unix\(samba:session\): session opened for user