dose somebdy know the functions for these files under /tmp/.oracle/?

 I encountered below error when tried to start a listener:

TNSLSNR for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Production
System parameter file is PATH/listener.ora
Log messages written to PATH/tns_<SID>.log
Error listening on: (ADDRESS=(PROTOCOL=IPC)(KEY=<SID>))
TNS-12555: TNS:permission denied
 TNS-12560: TNS:protocol adapter error
  TNS-00525: Insufficient privilege for operation
   IBM/AIX RISC System/6000 Error: 1: Not owner

finally, we find that the files under /tmp/.oracle are not owned by user oracle, after we corrected the attributes, the listener is fine.

these files are:

$ ls -l /tmp/.oracle/s<SID>
srwxrwxrwx    1 200      dba               0 Mar 23 12:18 /tmp/.oracle/s<SID>