Date: Wed, 15 Jul 1998 06:15:21 +0000 (GMT) From: Terry Lambert <tlambert@primenet.com> To: shigio@wafu.netgate.net (Shigio Yamaguchi) Cc: sbabkin@dcn.att.com, shigio@wafu.netgate.net, hackers@FreeBSD.ORG Subject: Re: Improvemnet of ln(1). Message-ID: <199807150615.XAA06392@usr06.primenet.com> In-Reply-To: <199807141528.IAA18558@hub.freebsd.org> from "Shigio Yamaguchi" at Jul 15, 98 00:29:33 am
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> Do you mean a symbolic link including root directory is useless?
> You are right. My example was bad.
>
> How about this example?
>
> % ln -sr /usr/src/sys/kern/tty.c /usr/obj/usr/src/sys/kern/tty.c
> % ls -l !$
> lrwxrwxrwx 1 shigio bin 33 Jul 14 23:56 /usr/obj/usr/src/sys/kern/tty.c ->
> ../../../../../src/sys/kern/tty.c
>
> This symbolic link is solved in the '/usr' subdirectory. So, you can mount
> /usr file system at any point.
#!/bin/sh
#
# A script that needs to make non-existant absolute symlinks
#
TARGET=$1
if test "x$1" = "x"
then
echo "usage: mkbuild <target>" >&2
exit 1
fi
cd /
# copy in the kernel so ps will work...
cp kernel ${TARGET}
# copy in the rest of the stuff to make the environment minimally functional
cp -R bin ${TARGET}
cp -R dev ${TARGET}
cp -R etc ${TARGET}
cp -R usr ${TARGET}
cd b
cp -R newsrc ${TARGET}/usr
cd ..
ln -s /usr/lib ${TARGET}/lib
# make a non-existant link to the newsrc kernel sources..
ln -s /usr/newsrc/sys /sys
# now enter into the isolated developement environment...
chroot ${TARGET} /bin/sh
exit 0
Terry Lambert
terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.
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