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|
# Setup for using apt to install packages in /target.
mountpoints () {
cut -d" " -f2 /proc/mounts | sort | uniq
}
# Make sure mtab in the chroot reflects the currently mounted partitions.
update_mtab() {
mtab=/target/etc/mtab
if [ -h "$mtab" ]; then
logger -t $0 "warning: $mtab won't be updated since it is a symlink."
return 0
fi
egrep '^[^ ]+ /target' /proc/mounts | (
while read devpath mountpoint fstype options n1 n2 ; do
devpath=`mapdevfs $devpath || echo $devpath`
mountpoint="${mountpoint#/target}"
# mountpoint for root will be empty
if [ -z "$mountpoint" ] ; then
mountpoint="/"
fi
echo $devpath $mountpoint $fstype $options $n1 $n2
done ) > $mtab
}
divert () {
chroot /target dpkg-divert --quiet --add --divert "$1.REAL" --rename "$1"
}
undivert () {
rm -f "/target$1"
chroot /target dpkg-divert --quiet --remove --rename "$1"
}
chroot_setup () {
# Bail out if directories we need are not there
if [ ! -d /target/sbin ] || [ ! -d /target/usr/sbin ] || \
[ ! -d /target/proc ]; then
return 1
fi
if [ -d /sys/devices ] && [ ! -d /target/sys ]; then
return 1
fi
if [ -e /var/run/chroot-setup.lock ]; then
cat >&2 <<EOF
apt-install or in-target is already running, so you cannot run either of
them again until the other instance finishes. You may be able to use
'chroot /target ...' instead.
EOF
return 1
fi
touch /var/run/chroot-setup.lock
# Create a policy-rc.d to stop maintainer scripts using invoke-rc.d
# from running init scripts. In case of maintainer scripts that don't
# use invoke-rc.d, add a dummy start-stop-daemon.
cat > /target/usr/sbin/policy-rc.d <<EOF
#!/bin/sh
exit 101
EOF
chmod a+rx /target/usr/sbin/policy-rc.d
if [ -e /target/sbin/start-stop-daemon ]; then
divert /sbin/start-stop-daemon
fi
cat > /target/sbin/start-stop-daemon <<EOF
#!/bin/sh
echo 1>&2
echo 'Warning: Fake start-stop-daemon called, doing nothing.' 1>&2
exit 0
EOF
chmod a+rx /target/sbin/start-stop-daemon
# If Upstart is in use, add a dummy initctl to stop it starting jobs.
if [ -x /target/sbin/initctl ]; then
divert /sbin/initctl
cat > /target/sbin/initctl <<EOF
#!/bin/sh
if [ "\$1" = version ]; then exec /sbin/initctl.REAL "\$@"; fi
echo 1>&2
echo 'Warning: Fake initctl called, doing nothing.' 1>&2
exit 0
EOF
chmod a+rx /target/sbin/initctl
fi
# Record the current mounts
mountpoints > /tmp/mount.pre
case `udpkg --print-os` in
"linux")
# Some packages (eg. the kernel-image package) require a mounted
# /proc/. Only mount it if not mounted already
if [ ! -f /target/proc/cmdline ]; then
mount -t proc proc /target/proc
fi
# For installing >=2.6.14 kernels we also need sysfs mounted
# Only mount it if not mounted already
if [ ! -d /target/sys/devices ]; then
mount -t sysfs sysfs /target/sys
fi
# In Lenny, /dev/ lacks the pty devices, so we need devpts mounted
if [ ! -e /target/dev/pts/0 ]; then
mkdir -p /target/dev/pts
mount -t devpts devpts -o noexec,nosuid,gid=5,mode=620 \
/target/dev/pts
fi
if ! mountpoints | grep -q '^/target/run$'; then
mount --bind /run /target/run
fi
;;
"kfreebsd")
# Some packages (eg. the kernel-image package) require a mounted
# /proc/. Only mount it if not mounted already
if [ ! -f /target/proc/cmdline ]; then
mount -t linprocfs proc /target/proc
fi
# Some package might need sysfs mounted
# Only mount it if not mounted already
if [ ! -d /target/sys/devices ]; then
mount -t linsysfs sysfs /target/sys
fi
;;
esac
mountpoints > /tmp/mount.post
update_mtab
# Try to enable proxy when using HTTP.
# What about using ftp_proxy for FTP sources?
RET=$(debconf-get mirror/protocol || true)
if [ "$RET" = "http" ]; then
RET=$(debconf-get mirror/http/proxy || true)
if [ "$RET" ]; then
http_proxy="$RET"
export http_proxy
fi
fi
# Pass debconf priority through.
DEBIAN_PRIORITY=$(debconf-get debconf/priority || true)
export DEBIAN_PRIORITY
LANG=${IT_LANG_OVERRIDE:-$(debconf-get debian-installer/locale || true)}
export LANG
export PERL_BADLANG=0
# Unset variables that would make scripts in the target think
# that debconf is already running there.
unset DEBIAN_HAS_FRONTEND
unset DEBIAN_FRONTEND
unset DEBCONF_FRONTEND
unset DEBCONF_REDIR
# Avoid debconf mailing notes.
DEBCONF_ADMIN_EMAIL=""
export DEBCONF_ADMIN_EMAIL
# Avoid apt-listchanges doing anything.
APT_LISTCHANGES_FRONTEND=none
export APT_LISTCHANGES_FRONTEND
# Sometimes sudo may need to be removed (e.g. when installing
# sudo-ldap). There's no situation in which doing this during d-i
# is a problem, so unconditionally override the guard in sudo.prerm.
SUDO_FORCE_REMOVE=yes
export SUDO_FORCE_REMOVE
return 0
}
chroot_cleanup () {
rm -f /target/usr/sbin/policy-rc.d
undivert /sbin/start-stop-daemon
if [ -x /target/sbin/initctl.REAL ]; then
undivert /sbin/initctl
fi
# Undo the mounts done by the packages during installation.
# Reverse sorting to umount the deepest mount points first.
# Items with count of 1 are new.
for dir in $( (cat /tmp/mount.pre /tmp/mount.pre; mountpoints ) | \
sort -r | uniq -c | grep "^[[:space:]]*1[[:space:]]" | \
sed "s/^[[:space:]]*[0-9][[:space:]]//"); do
if ! umount $dir; then
logger -t $0 "warning: Unable to umount '$dir'"
fi
done
rm -f /tmp/mount.pre /tmp/mount.post
rm -f /var/run/chroot-setup.lock
}
# Variant of chroot_cleanup that only cleans up chroot_setup's mounts.
chroot_cleanup_localmounts () {
rm -f /target/usr/sbin/policy-rc.d
undivert /sbin/start-stop-daemon
if [ -x /target/sbin/initctl.REAL ]; then
undivert /sbin/initctl
fi
# Undo the mounts done by the packages during installation.
# Reverse sorting to umount the deepest mount points first.
# Items with count of 1 are new.
for dir in $( (cat /tmp/mount.pre /tmp/mount.pre /tmp/mount.post ) | \
sort -r | uniq -c | grep "^[[:space:]]*1[[:space:]]" | \
sed "s/^[[:space:]]*[0-9][[:space:]]//"); do
if ! umount $dir; then
logger -t $0 "warning: Unable to umount '$dir'"
fi
done
rm -f /tmp/mount.pre /tmp/mount.post
rm -f /var/run/chroot-setup.lock
}
|
