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From: "Hannu E K Nevalainen" <garbage_collector AT telia DOT com>
To: <cygwin AT cygwin DOT com>
Subject: RE: More on 'setup' fails and breaks pre-existing Cygwin installation: "The Rational Rose Files"
Date: Tue, 23 Mar 2004 19:51:38 +0100
Message-ID: <NGBBLLIAMFLGJEOAJCCEKEJFDJAA.garbage_collector@telia.com>
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> From: Dave Korn
> > From: cygwin-owner On Behalf Of Christopher M. Balz
> > Sent: 23 March 2004 06:39

> > Apparently however, from your comments, it looks as if the
> > MKS system makes breaks the Cygwin installation.  Is there a
> > way (or a place I could look to find out) where I could
> > protect the path that Cygwin uses?
> >
> > Thank you so much for your help.
> >
> >  - Chris
>
>   Simplest thing to do I reckon is to put something in either your
> cygwin.bat or your .bashrc / .profile to reset $PATH to something safe,
> depending on how you most commonly start up cygwin.
>
>     cheers,
>       DaveK

The attached script might come in handy; as defined it removes lines that
matches

 sd="/bc"
 grep -v -i "$sd"

(check the script and locate the lines), delivered to all of you "as is",
no warranties implied... It is probably possible to enhance it: I haven't
bothered to do that, yet.

I use it to remove certain elements of $PATH that _MIGHT_ be in there when I
launch cygwin/bash. Use: "source <script>" is in my ~/.profile


/Hannu E K Nevalainen, B.Sc. EE - 59+16.37'N, 17+12.60'E

** on a mailing list; please keep replies on that particular list **

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#NOTE: You MUST 'source' this.
#DON'T: !/bin/bash

#This is to remove the Borland compiler paths from PATH
#Install paths can be something like:
#
#	c:\PROGRAM\BC31_DOS\BIN
#	c:\PROGRAM\BC5\BIN
#
# which will contain / instead of \ in bash.
#
#grep PATTERN to look for (and remove)
sd=3D"/bc"
hd=3D".rm_bc_paths:"

#lets have a copy of the current PATH
echo $PATH 				>/tmp/PATH

#replace ':' with linefeeds
tr ':' '\n' 			</tmp/PATH		>/tmp/PATHLF

#remove lines that contains $sd
grep -v -i "$sd"	</tmp/PATHLF 		>/tmp/PATH_CLEANLF1
#remove lines referring to /cygdrive/c
grep -v -i "/cygdrive/c" </tmp/PATH_CLEANLF1 >/tmp/PATH_CLEANLF

#restore :'s as separator,
# could be done w 'tr', but more control is required
cat /tmp/PATH_CLEANLF | (=20
	read d;=20
	while [ ! -z "$d" ] ;do=20
		echo -n "$d";=20
		read d;=20
		if [ ! -z "$d" ] ;then=20
			echo -n ":";
		fi;=20
	done
)	>/tmp/PATH_CLEAN

#set the new clean path
export PATH=3D`cat /tmp/PATH_CLEAN`

#inform user...
diff -u0p /tmp/PATHLF /tmp/PATH_CLEANLF >/tmp/PATH_REMOVED
if [ `wc -w </tmp/PATH_REMOVED` -gt 0 ]
then
  echo "$hd --- Removed path(s) --- "
#  cat /tmp/PATH_REMOVED
#  echo "---"
	sed </tmp/PATH_REMOVED -rne "s,^-([^-].*)$,${hd} \1,p"
  echo "$hd --- end of list --- "
else
  echo "$hd \"$sd\" not found. No action taken"
fi

#cleanup
rm /tmp/PATH*
unset sd
unset hd


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