Open a file and write "\n" to it. Re-open the file and use binmode, then read it back in. The result is the desired string.

Something like this... 

open $foo, $tempfilename;
print $foo "\n";
close $foo;  # probably redundant, but why not.
open $foo, $tempfilename;
binmode $foo;
read $foo, $result, 999;
close $foo;

[download]
If you don't have a writable file (why not a valid temp directory??!) use a filehandle tied to a text buffer. Say, IO::Scalar.

Hmm, I tried that and it didn't work, as I half-suspected. The binmode thing is done in the C Standard library functions, and Perl might be relying on that and have no real knowledge of what it means on a given platform.

Are you sure you can't come up with a writable file, or a fake file that operates on the FD level rather than Perl's tie level?

—John

In reply to Re: Quick and portable way to determine line-ending string? by John M. Dlugosz
in thread Quick and portable way to determine line-ending string? by bikeNomad

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