rootcrs.pl unlock 时 Unimplemented: POSIX::tmpnam

安装psu补丁，执行rootcrs.pl -unlock 后提示异常：

 [root]:/oracle/app/11.2.0.4/grid/crs/install>./rootcrs.pl -unlock
 Unimplemented: POSIX::tmpnam(): use File::Temp instead at /usr/opt/perl5/lib/5.28.1/aix-thread-multi/POSIX.pm line 185.
 Unimplemented: POSIX::tmpnam() at crsconfig_lib.pm line 700.
 BEGIN failed--compilation aborted at crsconfig_lib.pm line 700.
 Compilation failed in require at ./rootcrs.pl line 305.
 BEGIN failed--compilation aborted at ./rootcrs.pl line 305.
 [root]:/oracle/app/11.2.0.4/grid/crs/install>ls -l /usr/opt/perl5/lib/5.28.1/aix-thread-multi/POSIX.pm
 -r--r--r--    1 root     system        20347 Feb 21 2019  /usr/opt/perl5/lib/5.28.1/aix-thread-multi/POSIX.pm
 [root]:/oracle/app/11.2.0.4/grid/crs/install>perl -V
 Summary of my perl5 (revision 5 version 28 subversion 1) configuration:

 Platform:
 osname=aix
 osvers=7.1.0.0
...

由于升级aix版本，导致perl升级到5.28
降低perl版本到5.10，问题解决后，再升级perl
以后每次打补丁可能都需要回退这个软件，后期还会遇到什么问题难说。

官方正规的解决方法是：


参考：Doc ID 2697590.1