Re^4: help in ruby code to perl

binmode($fh, ':raw'); is the same thing as binmode($fh);, but they're not the same as using :raw with open.

Using binmode :raw disables layers that can be disabled. This doesn't disable buffering if the underlying layer does any.

Using open :raw prevents some layers from being added in the first place, and this has been shown to prevent buffering.

$ perl -le'open $fh, "<", "foo"; print for PerlIO::get_layers($fh)'
unix
perlio

$ perl -le'open $fh, "<", "foo"; binmode $fh; print for PerlIO::get_la
+yers($fh)'
unix
perlio

$ perl -le'open $fh, "<", "foo"; binmode $fh, ":raw"; print for PerlIO
+::get_layers($fh)'
unix
perlio

$ perl -le'open $fh, "<:raw", "foo"; print for PerlIO::get_layers($fh)
+'
unix
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Re^5: help in ruby code to perl by jwkrahn (Abbot) on Sep 20, 2009 at 18:44 UTC
I'm sorry, I can not find anything in the documentation (so far) that says that open and binmode do different things with `:raw`. Could you point me in the right dirrection please? Update: Perhaps you are thinking of this section of PerlIO: `To get an un-buffered stream specify an unbuffered layer (e.g. +":unix") in the open call: open($fh,"<:unix",$path)` [download]	[reply] [d/l] [select]
Re^6: help in ruby code to perl by ikegami (Patriarch) on Sep 20, 2009 at 18:55 UTC
Could you point me in the right dirrection please? I don't know it to be in the docs. And from what I see, it actually contradicts PerlIO which claims `:raw` only pops layers that aren't compatible with binary data. Perhaps you are thinking of this section of PerlIO: No, I know this from PerlMonks discussions.	[reply] [d/l]