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Message-Id:	<200708202358.l7KNwl7b025934@tigris.pounder.sol.net>
To:	cygwin AT cygwin DOT com
From:	cygzw AT trodman DOT com (Tom Rodman)
Reply-to:	cygwin AT cygwin DOT com
X-note:	From should match addr u signed up w/, else post will not show for > 90 min (3/2005)
Subject:	symbolic link untar issue
X-note:	getting started: oPS1=$PS1 PS1="\w $ " cd; date;uname -a
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Date:	Mon, 20 Aug 2007 18:58:46 -0500
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Content-ID: <25930 DOT 1187654209 DOT 1 AT tigris DOT pounder DOT sol DOT net>

These steps 'hide bash', so invoking bash again fails:

  /tmp $ uname -a
  CYGWIN_NT-5.0 argon 1.5.24(0.156/4/2) 2007-01-31 10:57 i686 Cygwin
  /tmp $ tar tvf bar.tar
  drwxrwxr-x staffuser1/XYZ_ES_STAFF 0 2007-08-20 17:29 ZZ/
  lrwxrwxrwx staffuser1/XYZ_ES_STAFF 0 2007-08-20 17:29 ZZ/bash2 -> /bin/bash
  /tmp $ tar xpf bar.tar; tar xpf bar.tar #2nd untar does the damage
  /tmp $ ls -l /bin/bash
  ---------- 1 adm_usr1 None 0 Aug 20 18:03 /bin/bash
  /tmp $ ls -l /bin/bash.exe
  -rwxrwxrwx 1 Administrator Users 470528 May  1 21:22 /bin/bash.exe*
  /tmp $ bash
  -bash: /usr/bin/bash: Permission denied

Notice the zero byte file '/bin/bash' w/o any perms; it causes subsequent
invocations of bash to fail.  It is the 2nd untar that does it.

Here's what is in 'bar.tar' ( which is also attached ):

  /tmp/ZZ $ md5sum /tmp/bar.tar
  0a3b22f3e6d00c68f7000b4fc1b80993 */tmp/bar.tar
  /tmp $ cd ZZ
  /tmp/ZZ $ cmd /c dir
   Volume in drive D has no label.
   Volume Serial Number is BC28-E542

   Directory of d:\aut\cyg\tmp\ZZ

  08/20/2007  05:29p      <DIR>          .
  08/20/2007  05:29p      <DIR>          ..
  08/20/2007  06:03p                 108 bash2.lnk
                 1 File(s)            108 bytes
                 2 Dir(s)     544,944,128 bytes free
  /tmp/ZZ $ cmd /c type bash2.lnk|command od -Ad -c
  0000000   L  \0  \0  \0 001 024 002  \0  \0  \0  \0  \0 300  \0  \0  \0
  0000016  \0  \0  \0   F  \f  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
  0000032  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
  0000048  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0 001  \0  \0  \0
  0000064  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \t  \0   /   b
  0000080   i   n   /   b   a   s   h 023  \0   d   :   \   a   u   t   \
  0000096   c   y   g   \   b   i   n   \   b   a   s   h
  0000108

Is that an old style cygwin snybolic link?  If so how do I identify all of them,
so I might update them on my system?

--
thanks,
Tom Rodman

--
Cleanup.., how to delete the zero byte '/bin/bash':

  /tmp/ZZ $ (cd /bin ; chmod 777 bash;cmd /c del bash; ls -l bash)
  -rwxrwxrwx 1 Administrator Users 470528 May  1 21:22 bash*

--

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