sidhekin@blackbox:~$ perl -wT -Mstrict -e 'system("/bin/ls -l")'
Insecure $ENV{PATH} while running with -T switch at -e line 1.
sidhekin@blackbox:~$ 
##</code><code>##

sidhekin@blackbox:~$ perl -wT -Mstrict -e 'system("/bin/ls", "-l")'
Insecure $ENV{PATH} while running with -T switch at -e line 1.
sidhekin@blackbox:~$ 

##</code><code>##

sidhekin@blackbox:~$ perl -wT -Mstrict -e 'delete $ENV{PATH}; system("/bin/ls", "-l")'
Insecure $ENV{BASH_ENV} while running with -T switch at -e line 1.
sidhekin@blackbox:~$