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Perl Language Reference Manual
by Larry Wall and others
Paperback (6"x9"), 724 pages
ISBN 9781906966027
RRP £29.95 ($39.95)

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PERL_ALLOW_NON_IFS_LSP (specific to the Win32 port)

Set to 1 to allow the use of non-IFS compatible LSP's. Perl normally searches for an IFS-compatible LSP because this is required for its emulation of Windows sockets as real filehandles. However, this may cause problems if you have a firewall such as McAfee Guardian which requires all applications to use its LSP which is not IFS-compatible, because clearly Perl will normally avoid using such an LSP. Setting this environment variable to 1 means that Perl will simply use the first suitable LSP enumerated in the catalog, which keeps McAfee Guardian happy (and in that particular case Perl still works too because McAfee Guardian's LSP actually plays some other games which allow applications requiring IFS compatibility to work).

ISBN 9781906966027Perl Language Reference ManualSee the print edition