In sun solaris 2.7 , the files is in the :

/home/oracle7/admin/wgm4/trace


wgm4 is the oracle SID.

In the directory are the :


listener.cdf 109184 Dec 16 1999
listener.trc 1903940 Aug 29 08:22
listener.dat 171393024 Dec 16 1999

regards