Attachment 889837 Details for Bug 1048404 – upgrade-prep.sh

upgrade-prep.sh

upgrade-prep.sh (text/plain), 3.16 KB, created by Will Woods on 2014-04-25 17:02:16 UTC

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Creator: Will Woods

Created: 2014-04-25 17:02:16 UTC

Size: 3.16 KB

patch

obsolete

>#!/bin/bash
># upgrade-prep.sh - set up upgrade dir for upgrading
>#
># Copyright (C) 2012 Red Hat Inc.
>#
># This program is free software; you can redistribute it and/or modify
># it under the terms of the GNU General Public License as published by
># the Free Software Foundation; either version 2 of the License, or
># (at your option) any later version.
>#
># This program is distributed in the hope that it will be useful,
># but WITHOUT ANY WARRANTY; without even the implied warranty of
># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
># GNU General Public License for more details.
>#
># You should have received a copy of the GNU General Public License along
># with this program.  If not, see <http://www.gnu.org/licenses/>.
>#
># Author: Will Woods <wwoods@redhat.com>
>
>die() { echo "$@"; exit 1; }
>
>UPGRADEROOT=/system-upgrade-root
>
>[ -d "$UPGRADEROOT" ] || die "$UPGRADEROOT does not exist"
>
>grep -qw 'upgrade.test' /proc/cmdline && UPGRADETEST=1 || UPGRADETEST=''
>
># remove our boot entry
>[ $UPGRADETEST ] || new-kernel-pkg --remove fedup
>
># Sanity check: Are all the packages present?
>while read pkg; do
>    [ -f /system-upgrade/$pkg ] || missing="$missing $pkg"
>done < /system-upgrade/package.list
>if [ -n "$missing" ]; then
>    echo "missing packages:"; for pkg in $missing; do echo "  $pkg"; done
>    die "aborting upgrade due to missing packages."
>fi
>
># make target dir for systemd's pivot_root
>mkdir -p $UPGRADEROOT/mnt
>
># unmount any temporary mounts set up by the initramfs
>cat /proc/mounts | while read dev mnt type rest; do
>    [ "$type" == "autofs" ] && continue
>    [ -f $mnt/.please-unmount ] && umount -l $mnt
>done
>
># XXX backwards compatibility for upgrade.img from F18 and earlier
># if /lib/modules/$(uname -r) is a mount, umount it
>moddir=$(readlink -eq /lib/modules/$(uname -r))
>grep -qw $moddir /proc/mounts && umount -l $moddir
>
># make mountpoints for anything that's mounted directly under /
>cat /proc/self/mountinfo | while read mntid parentid majmin root mnt rest; do
>    [ "$parentid" == 0 ] && rootid="$mntid" && continue
>    if [ "$parentid" == "$rootid" -a ! -d "$mnt" ]; then
>        echo "creating mountpoint ${UPGRADEROOT}${mnt}"
>        mkdir -p "${UPGRADEROOT}${mnt}"
>    fi
>done
>
>echo "moving mounts into $UPGRADEROOT"
>mount --make-unbindable $UPGRADEROOT
># bind everything into the upgrade chroot
>mount --rbind / $UPGRADEROOT/sysroot || die "couldn't bind / into upgrade dir"
># make the bind mounts separate from the original mounts
>mount --make-rprivate /
># unmount the original mounts, i.e.:
>#   anything that's a block device, not root, and not under UPGRADEROOT
>tac /proc/mounts | while read dev mnt type opts x y; do
>    if [ -b "$dev" -a "$mnt" != "/" -a "${mnt#$UPGRADEROOT}" == "$mnt" ]; then
>        umount $mnt && echo "moved $mnt" || echo "failed to move $mnt"
>    fi
>done
>
># XXX: backward compatibility with upgrade.img < 0.8.0
>if [ ! -L /run/system-upgrade ]; then
>    echo "switching upgraderoot default target to upgrade.target"
>    # switch the upgrade chroot target to upgrade.target
>    ln -sf upgrade.target $UPGRADEROOT/etc/systemd/system/default.target
>    rm -f $UPGRADEROOT/usr/lib/systemd/system/default.target
>fi
>
>echo "upgrade prep complete, switching root..."

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Attachments on bug 1048404: 889837