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OLDHOME=${ORACLE_HOME}    ;    export    OLDHOME
unset    TWO_TASK;
...
ORACLE_LPPROG=/usr/bin/lp    ;    export    ORACLE_LPPROG
ORACLE_LPARGS='-o    nobanner'    ;    export    ORACLE_LPARGS
#

#!/usr/bin/perl -w
#
...
%ENV = (%ENV, get_login_env());

print "\n\t\tPlay with ENV ends\n" ;

$ xxrc_pickup_env.pl
 
...
grep: can't open tty
 
                Play with ENV ends