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- # Setup for using apt to install packages in /target.
-
- mountpoints () {
- cut -d" " -f2 /proc/mounts | sort | uniq
- }
-
- 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 /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
- mv /target/sbin/start-stop-daemon /target/sbin/start-stop-daemon.REAL
- 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
-
- # Record the current mounts
- mountpoints > /tmp/mount.pre
-
- # 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
-
- # 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
-
- return 0
- }
-
- chroot_cleanup () {
- rm -f /target/usr/sbin/policy-rc.d
- mv /target/sbin/start-stop-daemon.REAL /target/sbin/start-stop-daemon
-
- # 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
-
- rm -f /var/run/chroot-setup.lock
- }
-