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Re^2: dos2ux shows cannot open file if it is greater than 2GB size

by ikegami (Pope)
on Mar 13, 2013 at 17:44 UTC ( #1023270=note: print w/ replies, xml ) Need Help??


in reply to Re: dos2ux shows cannot open file if it is greater than 2GB size
in thread dos2ux shows cannot open file if it is greater than 2GB size

It's closer to

open(my $in, '<', $ARGV[0]) or die $!; unlink($ARGV[0]); open(my $out, '>', $ARGV[0]) or die $!; while (<$in>) { s/\r\n/\n/; print($out $_); }


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Re^3: dos2ux shows cannot open file if it is greater than 2GB size
by shan_emails (Beadle) on Mar 14, 2013 at 14:45 UTC

    Thanks Buddy...It works fine.

    But it takes time to complete.

      You can actually optimize the regular expression using a string termination anchor: s/\r$// That keeps it from having to check the entire string.


      #11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

      To speed things up, I'd read more at a time.
      perl -pe'BEGIN { $/ = \(1024*1024); } s/\r//g;' file.in >file.out
      But yeah, it will take time to copy 7GB.

        That will change *ALL* \r in text, not just trailing \r. I do not think that is what dos2ux is supposed to do, though I admit that HP's manual page isn't very clear on that:

        DESCRIPTION dos2ux and ux2dos read each specified file in sequence and write + it to standard output, converting to HP-UX format or to DOS format, respectively. Each file can be either DOS format or HP-UX forma +t for either command. A DOS file name is recognized by the presence of an embedded col +on (:) delimiter; see dosif(4) for DOS file naming conventions. If no input file is given or if the argument - is encountered, d +os2ux and ux2dos read from standard input. Standard input can be comb +ined with other files.

        Enjoy, Have FUN! H.Merijn

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