Re^2: File I/O question

Discounting an obsolete build of Perl on an obsolete version of Mac, there's no OS dependency. The only difference is whether the :crlf I/O layer is used or not.

The :crlf layer is used by default on Windows and in environments where it appears in $ENV{PERLIO}. Overriding the default PerlIO layers can avoid it, and the one-argument call to binmode disables it.

With :crlf IO layer absent or disabled
	MacPerl*	Everything else
`\n`	`CR`	`LF`
`\r`	`LF`	`CR`
`\012`	`LF`	`LF`
`\015`	`CR`	`CR`
`\015\012`	`CR LF`	`CR LF`

With :crlf IO layer present and enabled
	MacPerl*	Everything else
`\n`	N/A	`CR LF`
`\r`	N/A	`CR`
`\012`	N/A	`CR LF`
`\015`	N/A	`CR`
`\015\012`	N/A	`CR CR LF`

MacPerl is an obsolete build of Perl for obsolete Macs. It predates PerlIO.

Comment on Re^2: File I/O question Select or Download Code