From: blarsen AT intervett DOT no (=?iso-8859-1?Q?Bj=F8rn_Hell_Larsen?=)
Subject: -b bug, feature or oddity ?
21 Oct 1998 21:58:37 -0700
Message-ID: <001301bdfcde$92717410$124b47c1.cygnus.gnu-win32@sorokin.intervett.no>
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To: "Gnu-Win32" <gnu-win32 AT cygnus DOT com>

I've been playing around with mount -b, and stumbled
across something that surprised me a bit.

a) I have a "binary file" (in this case: a file with
   a CTRL-Z character at the start of line two):

   SOROKIN ~> cd /
   SOROKIN /> od -c foo
   0000000   L   i   n   e       1  \r  \n 032   L   i   n   e       2  \r
   0000020  \n
   0000021

b) If I try to 'cat' the file, it gets truncated. Fair enough:

   SOROKIN /> cat foo
   Line 1
   SOROKIN />

c) I decide to create a binary mountpoint in order to be able to
   see the entire file:

   SOROKIN /> mount -b D: /binpoint
   SOROKIN /> mount
   Device           Directory           Type        Flags
   \\.\tape1:       /dev/st1            native      text!=binary
   \\.\tape0:       /dev/st0            native      text!=binary
   \\.\b:           /dev/fd1            native      text!=binary
   \\.\a:           /dev/fd0            native      text!=binary
   D:               /binpoint           native      text=binary
   D:               /                   native      text!=binary

d) I test the new mountpoint

   SOROKIN /> cat /binpoint/foo
   Line 1
   Line 2
   SOROKIN /> 

e) Worked just great. But here comes the catch:

   SOROKIN /> cat /foo
   Line 1
   Line 2
   SOROKIN /> cat //d/foo
   Line 1
   Line 2
   SOROKIN /> cat 'D:\foo'
   Line 1
   Line 2
   SOROKIN /> 

   Ooops. It isn't just /binpoint that has become binary, it is
   all references to D: !


Why is this, is it as it should be, and is it documented anywhere?


In advance thanks, 

Bjorn

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