On Wed, Sep 10, 2008 at 10:10:20AM +0200, "Plüm, Rüdiger, VF-Group" wrote:
>
>
> > -----Ursprüngliche Nachricht-----
> > Von: [EMAIL PROTECTED]
> > Gesendet: Mittwoch, 10. September 2008 08:56
> > An: dev@httpd.apache.org
> > Betreff: Re: svn commit: r691418 [2/2] - in
> > /httpd/httpd/trunk: ./docs/manual/mod/ modules/filters/
> >
>
> > I investigated further. I wrote a test file having binary
> > character from 0 to 31:
> > $ od -c out.txt
> > 0000000 \0 \n 001 \n 002 \n 003 \n 004 \n 005 \n 006
> > \n 007 \n
> > 0000020 \b \n \t \n \n \n 013 \n \f \n \r \n 016
> > \n 017 \n
> > ...
> >
> > And a small sed script :
> > $ cat one.sed
> > l
> > d
> >
> > Sed script just runs the "l" command for each line.
> > $ /usr/ucb/sed -f one.sed out.txt > out1.txt
> >
> > Here is the output of out1.txt
> > $ od -c out1.txt
> > 0000000 \n \ 0 1 \n \ 0 2 \n \ 0 3 \n
> > \ 0 4
> > 0000020 \n \ 0 5 \n \ 0 6 \n \ 0 7 \n
> > - \b <
> > 0000040 \n - \b > \n \n \n \ 1 3 \n \ 1
> > 4 \n \
> > 0000060 1 5 \n \ 1 6 \n \ 1 7 \n \ 2
> > 0 \n \
> > ...
> >
> > $ cat out1.txt
> > \01
> > \02
> > \03
> > \04
> > \05
> > \06
> > \07
> > <
> > >
> >
> >
> > \13
> > \14
> >
> > -------------------------------------------
> >
> > So for some strange reason :
> > 0x8 is converted to "-\b<" and
> > 0x9 is converted to "-\b>"
> >
> > That's what we see in "trans" variable.
> >
> > Do you think it could be a bug in original sed and should we
> > correct it?
>
> I guess it is a bug in original sed and it should be corrected.
> IMHO it should be suffient to replace
>
> -\b<
>
> and
>
> -\b<
>
> with
>
> <
>
> and
>
> >
Can you elaborate why you chose "<" and ">". I could not think of any
reasons behind it.
sed's man page says :
(2)l List the pattern space on the standard out-
put in an unambiguous form. Non-printing
characters are spelled in two digit ASCII
and long lines are folded.
So 0x8 and 0x9 char values, which I believe are non printable characters,
should be printed into *two* digit ASCII. So \10 and \11 looks to me
as conforming to man page.
Regards,
Basant.
