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Perl in general:
Add ftw or find?
Add a parsing mechanism (user specifies parse tree, perl parses).
Arbitrary precision arithmetic.
File calculus (e.g. file1 = file2 + file3, file1 =^ s/foo/bar/g etc.)
MS-DOS version of Perl:
Add interface to treat dBase files as associative arrays.
Add int86x function.
Handle the C preprocessor.
Provide real pipes by switching the processes. (difficult)
Provide a list of ioctl codes.
Check the ioctl errno handling.
I can't find an easy way in Perl to pass a number as the first argument
to ioctl. This is needed for some functions of ioctl. Either hack
ioctl, or change perl to ioctl interface. Another solution would be
a perl pseudo array containing the filehandles indexed by fd.
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