> -----Ursprüngliche Nachricht----- > Von: [EMAIL PROTECTED] > Gesendet: Mittwoch, 10. September 2008 15:32 > An: dev@httpd.apache.org > Betreff: Re: svn commit: r691418 [2/2] - in > /httpd/httpd/trunk:./docs/manual/mod/ modules/filters/ > > 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.
Because these characters are currently displayed by sed and I saw no reason to change 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. As said displaying two digit ASCII's also makes sense and conforms to the man page. So go for it. BTW: Shouldn't it be \08 and \09 for 0x8 and 0x9 instead of \10 and \11 ? Regards Rüdiger
