We can check the availability of a folder using Perl as follows :

if(-d "cgi-bin")
{
          # directory called cgi-bin exists
}
elsif(-e "cgi-bin")
{
          # cgi-bin exists but is not a directory
}
else 
{
          # nothing called cgi-bin exists
}

As a note, -e doesn’t distinguish between files and directories. To check if something exists and is a plain file, use -f.