Groups | Search | Server Info | Login | Register


Groups > comp.programming.contests > #26

Re: The First Pure Shell Contest (PUSH): relativepath

Path csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!news.glorb.com!feeder.erje.net!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From Stephane CHAZELAS <stephane_chazelas@yahoo.fr>
Newsgroups comp.unix.shell, comp.unix.programmer, comp.programming.contests
Subject Re: The First Pure Shell Contest (PUSH): relativepath
Date Tue, 23 Aug 2011 18:23:50 +0000 (UTC)
Organization A noiseless patient Spider
Lines 30
Message-ID <slrnj57s1m.i97.stephane.chazelas@spam.is.invalid> (permalink)
References <9b7kg7F3njU1@mid.individual.net> <87ty99kxtk.fsf@sapphire.mobileactivedefense.com>
Injection-Date Tue, 23 Aug 2011 18:23:50 +0000 (UTC)
Injection-Info mx04.eternal-september.org; posting-host="qzG0Li1iwhS8BRIL3GjZtw"; logging-data="16127"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19bJkM2cvV7va/SBcrnyudF+DRPi5bVxBoqu2Ki5Sd9Bg=="
User-Agent slrn/pre1.0.0-18 (Linux)
Cancel-Lock sha1:4ppWV9SN/XsttYs7ICmyhtB56rg=
Mail-Copies-To nobody
Xref x330-a1.tempe.blueboxinc.net comp.unix.shell:1801 comp.unix.programmer:1182 comp.programming.contests:26

Cross-posted to 3 groups.

Show key headers only | View raw


2011-08-22, 21:15(+01), Rainer Weikusat:
> Jens Schweikhardt <schweikh@schweikhardt.net> writes:
>>     The First Pure Shell Contest (PUSH)
>>
>>               == Motivation ==
>>
>> The shell is not known for powerful string processing.
>
[...]
>     echo "<$1> not absolute or canonical"
[...]
>     while test -n "$fa" -a "$fa" = "$fb";
[...]
> 	if test -n "$fb" -o "$fa" != "$rb"
[...]

We may want to add those test cases:

/=/x         /            0 ../..
/            \\\\\\\\     1 <\\\\\\\\> not absolute or canonical

What about:

relativepath(){ for i do case $i/ in /|[!/]*|*/./*|*/../*|*?//*|//?*)
result="<$i> not absolute or canonical";return 1;esac;done
p=${1%/} r= b=${2%/}/;while :;do case $b in "$p"/*)r=$r${b#"$p"/}
r=${r%/};result=${r:-.};break;esac;p=${p%/*} r=../$r;done;}

-- 
Stephane

Back to comp.programming.contests | Previous | NextPrevious in thread | Next in thread | Find similar


Thread

The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <schweikh@schweikhardt.net> - 2011-08-19 17:23 +0000
  Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-19 18:13 +0000
    Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 19:12 +0000
      Re: The First Pure Shell Contest (PUSH): relativepath pk <pk@pk.invalid> - 2011-08-19 21:14 +0200
        Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 19:29 +0000
          Re: The First Pure Shell Contest (PUSH): relativepath pk <pk@pk.invalid> - 2011-08-19 21:37 +0200
            Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 20:04 +0000
              Re: The First Pure Shell Contest (PUSH): relativepath pk <pk@pk.invalid> - 2011-08-19 22:25 +0200
                Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 21:08 +0000
  Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-19 19:58 +0100
    Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 19:23 +0000
      Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-19 22:18 +0100
  Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <Stephane.CHAZELAS@free.fr> - 2011-08-20 20:07 +0000
    Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-21 10:43 +0000
    Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-21 15:14 +0100
      Re: The First Pure Shell Contest (PUSH): relativepath Janis Papanagnou <janis_papanagnou@hotmail.com> - 2011-08-21 18:28 +0300
      Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-21 16:19 +0000
        Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-21 20:12 +0000
  Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-22 21:15 +0100
    Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-23 18:23 +0000
      Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-23 19:52 +0100
        Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-23 21:56 +0000

csiph-web