378 lines
8.8 KiB
Text
378 lines
8.8 KiB
Text
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#!/bin/bash
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#
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# Assumptions:
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# 1) User has partitioned, formatted, and mounted partitions on /mnt
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# 2) Network is functional
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# 3) Arguments passed to the script are valid pacman targets
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# 4) A valid mirror appears in /etc/pacman.d/mirrorlist
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#
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shopt -s extglob
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# generated from util-linux source: libmount/src/utils.c
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declare -A pseudofs_types=([anon_inodefs]=1
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[autofs]=1
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[bdev]=1
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[binfmt_misc]=1
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[cgroup]=1
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[configfs]=1
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[cpuset]=1
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[debugfs]=1
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[devfs]=1
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[devpts]=1
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[devtmpfs]=1
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[dlmfs]=1
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[fuse.gvfs-fuse-daemon]=1
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[fusectl]=1
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[hugetlbfs]=1
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[mqueue]=1
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[nfsd]=1
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[none]=1
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[pipefs]=1
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[proc]=1
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[pstore]=1
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[ramfs]=1
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[rootfs]=1
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[rpc_pipefs]=1
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[securityfs]=1
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[sockfs]=1
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[spufs]=1
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[sysfs]=1
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[tmpfs]=1)
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# generated from: pkgfile -vbr '/fsck\..+' | awk -F. '{ print $NF }' | sort
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declare -A fsck_types=([cramfs]=1
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[exfat]=1
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[ext2]=1
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[ext3]=1
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[ext4]=1
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[ext4dev]=1
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[jfs]=1
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[minix]=1
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[msdos]=1
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[reiserfs]=1
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[vfat]=1
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[xfs]=1)
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out() { printf "$1 $2\n" "${@:3}"; }
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error() { out "==> ERROR:" "$@"; } >&2
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msg() { out "==>" "$@"; }
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msg2() { out " ->" "$@";}
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die() { error "$@"; exit 1; }
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ignore_error() {
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"$@" 2>/dev/null
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return 0
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}
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in_array() {
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local i
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for i in "${@:2}"; do
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[[ $1 = "$i" ]] && return 0
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done
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return 1
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}
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chroot_add_mount() {
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mount "$@" && CHROOT_ACTIVE_MOUNTS=("$2" "${CHROOT_ACTIVE_MOUNTS[@]}")
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}
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chroot_maybe_add_mount() {
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local cond=$1; shift
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if eval "$cond"; then
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chroot_add_mount "$@"
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fi
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}
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chroot_setup() {
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CHROOT_ACTIVE_MOUNTS=()
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[[ $(trap -p EXIT) ]] && die '(BUG): attempting to overwrite existing EXIT trap'
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trap 'chroot_teardown' EXIT
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chroot_maybe_add_mount "! mountpoint -q '$1'" "$1" "$1" --bind &&
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chroot_add_mount proc "$1/proc" -t proc -o nosuid,noexec,nodev &&
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chroot_add_mount sys "$1/sys" -t sysfs -o nosuid,noexec,nodev,ro &&
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ignore_error chroot_maybe_add_mount "[[ -d '$1/sys/firmware/efi/efivars' ]]" \
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efivarfs "$1/sys/firmware/efi/efivars" -t efivarfs -o nosuid,noexec,nodev &&
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chroot_add_mount udev "$1/dev" -t devtmpfs -o mode=0755,nosuid &&
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chroot_add_mount devpts "$1/dev/pts" -t devpts -o mode=0620,gid=5,nosuid,noexec &&
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chroot_add_mount shm "$1/dev/shm" -t tmpfs -o mode=1777,nosuid,nodev &&
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chroot_add_mount run "$1/run" -t tmpfs -o nosuid,nodev,mode=0755 &&
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chroot_add_mount tmp "$1/tmp" -t tmpfs -o mode=1777,strictatime,nodev,nosuid
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}
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chroot_teardown() {
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umount "${CHROOT_ACTIVE_MOUNTS[@]}"
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unset CHROOT_ACTIVE_MOUNTS
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}
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try_cast() (
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_=$(( $1#$2 ))
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) 2>/dev/null
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valid_number_of_base() {
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local base=$1 len=${#2} i=
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for (( i = 0; i < len; i++ )); do
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try_cast "$base" "${2:i:1}" || return 1
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done
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return 0
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}
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mangle() {
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local i= chr= out=
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unset {a..f} {A..F}
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for (( i = 0; i < ${#1}; i++ )); do
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chr=${1:i:1}
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case $chr in
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[[:space:]\\])
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printf -v chr '%03o' "'$chr"
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out+=\\
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;;
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esac
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out+=$chr
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done
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printf '%s' "$out"
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}
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unmangle() {
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local i= chr= out= len=$(( ${#1} - 4 ))
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unset {a..f} {A..F}
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for (( i = 0; i < len; i++ )); do
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chr=${1:i:1}
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case $chr in
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\\)
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if valid_number_of_base 8 "${1:i+1:3}" ||
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valid_number_of_base 16 "${1:i+1:3}"; then
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printf -v chr '%b' "${1:i:4}"
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(( i += 3 ))
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fi
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;;
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esac
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out+=$chr
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done
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printf '%s' "$out${1:i}"
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}
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optstring_match_option() {
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local candidate pat patterns
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IFS=, read -ra patterns <<<"$1"
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for pat in "${patterns[@]}"; do
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if [[ $pat = *=* ]]; then
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# "key=val" will only ever match "key=val"
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candidate=$2
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else
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# "key" will match "key", but also "key=anyval"
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candidate=${2%%=*}
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fi
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[[ $pat = "$candidate" ]] && return 0
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done
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return 1
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}
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optstring_remove_option() {
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local o options_ remove=$2 IFS=,
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read -ra options_ <<<"${!1}"
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for o in "${!options_[@]}"; do
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optstring_match_option "$remove" "${options_[o]}" && unset 'options_[o]'
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done
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declare -g "$1=${options_[*]}"
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}
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optstring_normalize() {
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local o options_ norm IFS=,
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read -ra options_ <<<"${!1}"
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# remove empty fields
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for o in "${options_[@]}"; do
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[[ $o ]] && norm+=("$o")
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done
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# avoid empty strings, reset to "defaults"
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declare -g "$1=${norm[*]:-defaults}"
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}
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optstring_append_option() {
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if ! optstring_has_option "$1" "$2"; then
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declare -g "$1=${!1},$2"
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fi
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optstring_normalize "$1"
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}
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optstring_prepend_option() {
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local options_=$1
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if ! optstring_has_option "$1" "$2"; then
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declare -g "$1=$2,${!1}"
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fi
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optstring_normalize "$1"
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}
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optstring_get_option() {
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local opts o
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IFS=, read -ra opts <<<"${!1}"
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for o in "${opts[@]}"; do
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if optstring_match_option "$2" "$o"; then
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declare -g "$o"
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return 0
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fi
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done
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return 1
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}
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optstring_has_option() {
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local "${2%%=*}"
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optstring_get_option "$1" "$2"
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}
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dm_name_for_devnode() {
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read dm_name <"/sys/class/block/${1#/dev/}/dm/name"
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if [[ $dm_name ]]; then
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printf '/dev/mapper/%s' "$dm_name"
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else
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# don't leave the caller hanging, just print the original name
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# along with the failure.
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print '%s' "$1"
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error 'Failed to resolve device mapper name for: %s' "$1"
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fi
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}
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fstype_is_pseudofs() {
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(( pseudofs_types["$1"] ))
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}
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fstype_has_fsck() {
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(( fsck_types["$1"] ))
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}
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hostcache=0
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copykeyring=1
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copymirrorlist=1
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usage() {
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cat <<EOF
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usage: ${0##*/} [options] root [packages...]
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Options:
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-C config Use an alternate config file for pacman
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-c Use the package cache on the host, rather than the target
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-d Allow installation to a non-mountpoint directory
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-G Avoid copying the host's pacman keyring to the target
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-i Avoid auto-confirmation of package selections
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-M Avoid copying the host's mirrorlist to the target
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-h Print this help message
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pacstrap installs packages to the specified new root directory. If no packages
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are given, pacstrap defaults to the "base" group.
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EOF
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}
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if [[ -z $1 || $1 = @(-h|--help) ]]; then
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usage
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exit $(( $# ? 0 : 1 ))
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fi
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(( EUID == 0 )) || die 'This script must be run with root privileges'
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while getopts ':C:cdGiM' flag; do
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case $flag in
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C)
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pacman_config=$OPTARG
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;;
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d)
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directory=1
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;;
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c)
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hostcache=1
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;;
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i)
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interactive=1
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;;
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G)
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copykeyring=0
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;;
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M)
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copymirrorlist=0
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;;
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:)
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die '%s: option requires an argument -- '\''%s'\' "${0##*/}" "$OPTARG"
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;;
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?)
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die '%s: invalid option -- '\''%s'\' "${0##*/}" "$OPTARG"
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;;
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esac
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done
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shift $(( OPTIND - 1 ))
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(( $# )) || die "No root directory specified"
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newroot=$1; shift
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pacman_args=("${@:-base}")
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if (( ! hostcache )); then
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pacman_args+=(--cachedir="$newroot/var/cache/pacman/pkg")
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fi
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if (( ! interactive )); then
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pacman_args+=(--noconfirm)
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fi
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if [[ $pacman_config ]]; then
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pacman_args+=(--config="$pacman_config")
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fi
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[[ -d $newroot ]] || die "%s is not a directory" "$newroot"
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if ! mountpoint -q "$newroot" && (( ! directory )); then
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die '%s is not a mountpoint!' "$newroot"
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fi
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# create obligatory directories
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msg 'Creating install root at %s' "$newroot"
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mkdir -m 0755 -p "$newroot"/var/{cache/pacman/pkg,lib/pacman,log} "$newroot"/{dev,run,etc}
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mkdir -m 1777 -p "$newroot"/tmp
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mkdir -m 0555 -p "$newroot"/{sys,proc}
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# mount API filesystems
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chroot_setup "$newroot" || die "failed to setup chroot %s" "$newroot"
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msg 'Installing packages to %s' "$newroot"
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if ! pacman -r "$newroot" -Sy "${pacman_args[@]}"; then
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die 'Failed to install packages to new root'
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fi
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if (( copykeyring )); then
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# if there's a keyring on the host, copy it into the new root, unless it exists already
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if [[ -d /etc/pacman.d/gnupg && ! -d $newroot/etc/pacman.d/gnupg ]]; then
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cp -a /etc/pacman.d/gnupg "$newroot/etc/pacman.d/"
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fi
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fi
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if (( copymirrorlist )); then
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# install the host's mirrorlist onto the new root
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cp -a /etc/pacman.d/mirrorlist "$newroot/etc/pacman.d/"
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fi
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# vim: et ts=2 sw=2 ft=sh:
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