Perl Pocket Reference, 4th Edition

Standard I/O Layers

:bytes

Use 8-bit bytes, as opposed to :utf8.

:crlf

Do CR/LF to newline translation, and vice versa.

:encoding(enc )

Select a specific encoding.

:perlio

Use Perl’s “PerlIO” implementation.

:raw

Use low-level I/O.

:stdio

Use the system’s “standard I/O” implementation.

:unix

Use Unix-style low-level I/O.

:utf8

Use Perl’s internal encoding of Unicode.

:Via(module)

Use the specified module to handle the I/O.

:win32

Use native I/O (Microsoft Windows platforms only).

PerlIO, perlrun (under ENVIRONMENT/PERLIO).