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Full Discussion: awk Command to add Carriage Return and Line Feed
Top Forums UNIX for Beginners Questions & Answers awk Command to add Carriage Return and Line Feed Post 303024780 by Scrutinizer on Tuesday 16th of October 2018 03:07:25 PM
Old 10-16-2018
Quote:
Originally Posted by Don Cragun
Hi Scrutinizer,
Note that the title of this thread (and the description in post #1 in this thread) says "add Carriage Return and Line Feed"; not "add Carriage Return before Line Feed".
I have been on this forum long enough that I do not expect exact specifications in the title. I interpreted this to mean a CRLF line ending instead of a LF ending. Do nothing when there is CRLF and change when only LF. It did not make sense to me otherwise.
Quote:
The description to me sounded like the input file is a DOS text file with <carriage-return><line-feed>(AKA <newline>) line separators that the submitter wants to turn into a DOS text file with complete DOS lines including a <carriage-return><line-feed> terminator at the end of the last line.

The standards say that the behavior is only defined for awk if all input files are text files. It doesn't make any exception to that requirement for files that are text files except for a partial final line. (The standards do make that exception for the ex utility.)
I know, I already said that I did not try to correct a failing newline at the end of the file with my suggestion. That is not how I interpreted it, I may be wrong..
Quote:
I am almost positive that PWB UNIX, UNIX System III, UNIX System V, and the Solaris /usr/xpg4/bin versions of awk (at least through early Solaris 10 updates) dropped partial lines without feeding them (with or without an added <newline>) through the script. But, I don't have access to any of those systems to verify it as this point. BSD/macOS awk does add a <newline> terminator to a partial line at the end of a file so it is an extension that is provided by GNU and other systems.
I don't know about really ancient versions, but I just tested with oawk, nawk, and /usr/xpg4/bin/awk on Solaris 10u11, awk on HPUX and AIX and Tru64. All read the unterminated last line and add a newline.. It may be that on older versions of Solaris it did not do that, but I think the awk utility has not changed in this respect (why would they put effort in "fixing" oawk or nawk if they are only there for legacy reasons?).
Last edited by Scrutinizer; 10-16-2018 at 10:15 PM..
 

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NAME

       XML::RSS::Headline::UsePerlJournals - XML::RSS::Headline Example Subclass

VERSION

       2.2

SYNOPSIS

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MUTAITED METHOD

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AUTHOR

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BUGS

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ACKNOWLEDGEMENTS

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COPYRIGHT &; LICENSE
       Copyright 2006 Jeff Bisbee, all rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO

       XML::RSS::Feed, XML::RSS::Headline, XML::RSS::Headline::PerlJobs, XML::RSS::Headline::Fark, POE::Component::RSSAggregator

perl v5.8.8							    2006-07-17				  XML::RSS::Headline::UsePerlJournals(3pm)
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