http://qs321.pair.com?node_id=1120759

Sec has asked for the wisdom of the Perl Monks concerning the following question:

I'm at a loss. Whenever I try to handle unicode/utf8 stuff in perl I hit a wall on how to do it in a sane way.

Please tell me that I'm missing something here.

My goals are:

Text read from stdin, written to stdout and arguments on the commandline should respect the current user locale.

Source code is in a fixed format (usually utf8) Files/pipes should be in the format I specify.

My example script:

#!/usr/bin/perl use strict; use warnings; use utf8; use open qw(:std :locale); open (my $in,"-|:encoding(utf8)","echo \xc3\xb6") || die ; my $line=<$in>; chomp($line); print "I read a line, that is ",length($line)," chars long.\n"; print "That line is: ",$line,"\n"; $line =~ s//o/; print "That line in ascii is: $line\n";
Let's run it:
karoshi:~>LC_CTYPE=de_DE.UTF-8 ./u8demo.pl I read a line, that is 1 chars long. That line is: That line in ascii is: o karoshi:~>LC_CTYPE=C ./u8demo.pl ascii "\xC3" does not map to Unicode at ./u8demo.pl line 12. ascii "\xB6" does not map to Unicode at ./u8demo.pl line 12. I read a line, that is 8 chars long. That line is: \xC3\xB6 That line in ascii is: \xC3\xB6
The second case fails horribly. I have no idea why. If I comment the "use open" line, it (of course) fails printing the umlauts on any utf-8 terminal
karoshi:~>./u8demo.pl I read a line, that is 1 chars long. That line is: &#65533; That line in ascii is: o
Is there a way to get perl to "do the right thing"?