Right, but it's important to know what sort of system you happen to be using, so that you invoke the fileparse_set_fstype() function when necessary:

$ uname -s
Darwin

$ echo '\one\two\three\four' 
\one\two\three\four

$ echo '\one\two\three\four' |
   perl -MFile::Basename -lne 'print basename($_)'
\one\two\three\four

$ echo '\one\two\three\four' |
   perl -MFile::Basename -lne 'BEGIN{fileparse_set_fstype("DOS")} prin
+t basename($_)'
four
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The above would work out the same way if the result of "uname -s" had been linux or unix.