| #!/bin/bash |
| # |
| # Copyright 2016 Google Inc. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| # Author: cheesy@google.com (Steve Hill) |
| # |
| # Setup a 32-bit chroot for CentOS. |
| |
| # This comes from build_env.sh. |
| if [ -z "${CHROOT_DIR:-}" ]; then |
| echo "This must be run via os_redirector.sh!" >&2 |
| exit 1 |
| fi |
| |
| install_dir="$(dirname "$BASH_SOURCE")/.." |
| |
| if [ -d "$CHROOT_DIR" ]; then |
| "$install_dir/run_in_chroot.sh" /bin/true >/dev/null 2>&1 |
| if [ $? -eq 0 ]; then |
| echo chroot already setup, nothing to do. |
| exit 0 |
| else |
| echo "$CHROOT_DIR exists but doesn't seem to be setup correctly." >&2 |
| echo "You're going to have to clean up manually." >&2 |
| exit 1 |
| fi |
| fi |
| |
| if [ "$UID" != 0 ]; then |
| echo "This script needs to run as root, re-running with sudo" |
| exec sudo $0 "$@" |
| exit 1 # NOTREACHED |
| fi |
| |
| # TODO(cheesy): The release_rpm stuff below is not especially robust, but |
| # scraping the site is a pain. If this is a problem we can fix it later. |
| |
| centos_version="$(lsb_release -rs)" |
| git_pkg= |
| if version_compare "$centos_version" -lt 6; then |
| # CentOS 5 |
| release_rpm_url=http://mirror.centos.org/centos/5/os/i386/CentOS/centos-release-5-11.el5.centos.i386.rpm |
| elif version_compare "$centos_version" -lt 7; then |
| # CentOS 6 |
| release_rpm_url=http://mirror.centos.org/centos/6/os/i386/Packages/centos-release-6-9.el6.12.3.i686.rpm |
| else |
| # CentOS 7 |
| release_rpm_url=http://mirror.centos.org/altarch/7/os/i386/Packages/centos-release-7-2.1511.el7.centos.2.9.i686.rpm |
| git_pkg=git |
| fi |
| |
| release_rpm="$(basename "$release_rpm_url")" |
| wget -O "$release_rpm" "$release_rpm_url" |
| |
| mkdir -p "$CHROOT_DIR/var/lib/rpm" |
| |
| # Required to run the chroot in 32-bit mode. |
| yum -y install setarch |
| |
| function cleanup_etc_rpm_platform() { |
| if [ -s /etc/rpm/platform.real ]; then |
| mv -f /etc/rpm/platform.real /etc/rpm/platform |
| elif [ -f /etc/rpm/platform.real ]; then |
| # Only do this if platform.real exists, otherwise we could delete a |
| # perfectly valid file. |
| rm -f /etc/rpm/platform /etc/rpm/platform.real |
| fi |
| } |
| |
| # To force install a different architecture, we must put a fake arch into |
| # /etc/rpm/platform. Older CentOSes will have the file, newer may not. Either |
| # way, it's important that we don't leave the fake one lying around. |
| trap 'cleanup_etc_rpm_platform' EXIT |
| if [ -e /etc/rpm/platform ]; then |
| mv /etc/rpm/platform /etc/rpm/platform.real |
| else |
| touch /etc/rpm/platform.real |
| fi |
| |
| echo i686-redhat-linux > /etc/rpm/platform |
| rpm --root="$CHROOT_DIR" --rebuilddb |
| rpm --root="$CHROOT_DIR" --nodeps -i "$release_rpm" |
| |
| yum -y --installroot="$CHROOT_DIR" update |
| # redhat-lsb and sudo are required for run_in_chroot.sh |
| yum -y --installroot="$CHROOT_DIR" install yum sudo redhat-lsb |
| |
| cleanup_etc_rpm_platform |
| trap - EXIT |
| |
| for x in passwd shadow group gshadow hosts sudoers resolv.conf; do |
| ln -f "/etc/$x" "$CHROOT_DIR/etc/$x" |
| done |
| |
| cp -p /etc/yum.repos.d/* "$CHROOT_DIR/etc/yum.repos.d/" |
| # These don't work for 32-bit. |
| if version_compare "$centos_version" -ge 6; then |
| rm -f "$CHROOT_DIR/etc/yum.repos.d"/CentOS-SCLo-scl[.-]* |
| fi |
| |
| for dir in /proc /sys /dev /selinux /etc/selinux /home; do |
| [ -d "$dir" ] || continue |
| chroot_dir="${CHROOT_DIR}$dir" |
| if [ ! -d "$chroot_dir" ]; then |
| mkdir -p "$chroot_dir" |
| chown --reference "$dir" "$chroot_dir" |
| chmod --reference "$dir" "$chroot_dir" |
| fi |
| echo "$dir $chroot_dir none bind 0 0" >> /etc/fstab |
| done |
| |
| echo "none $CHROOT_DIR/dev/shm tmpfs defaults 0 0" >> /etc/fstab |
| |
| mount -a |
| |
| # The previous yum install above probably did all the updates, |
| # but it doesn't hurt to ask. |
| "$install_dir"/run_in_chroot.sh yum -y update |
| "$install_dir"/run_in_chroot.sh \ |
| yum -y install which redhat-lsb curl wget $git_pkg |
| |
| if [ -z "$git_pkg" ]; then |
| # Install the bare minimum deps before building git. |
| "$install_dir"/run_in_chroot.sh yum -y install gcc zlib-devel |
| "$install_dir"/run_in_chroot.sh install/install_from_source.sh git |
| fi |