forked from mirrored-repos/manjaro-tools
200 lines
5.2 KiB
Bash
200 lines
5.2 KiB
Bash
#!/bin/bash
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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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#
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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
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# done
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# }
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# track_mount() {
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# if [[ -z $CHROOT_ACTIVE_MOUNTS ]]; then
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# CHROOT_ACTIVE_MOUNTS=()
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# trap 'chroot_umount' EXIT
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# fi
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#
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# mount "$@" && CHROOT_ACTIVE_MOUNTS=("$2" "${CHROOT_ACTIVE_MOUNTS[@]}")
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# }
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#
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# mount_conditionally() {
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# local cond=$1; shift
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# if eval "$cond"; then
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# track_mount "$@"
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# fi
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# }
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#
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# api_fs_mount() {
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# mount_conditionally "! mountpoint -q '$1'" "$1" "$1" --bind &&
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# track_mount proc "$1/proc" -t proc -o nosuid,noexec,nodev &&
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# track_mount sys "$1/sys" -t sysfs -o nosuid,noexec,nodev,ro &&
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# ignore_error mount_conditionally "[[ -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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# track_mount udev "$1/dev" -t devtmpfs -o mode=0755,nosuid &&
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# track_mount devpts "$1/dev/pts" -t devpts -o mode=0620,gid=5,nosuid,noexec &&
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# track_mount shm "$1/dev/shm" -t tmpfs -o mode=1777,nosuid,nodev &&
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# track_mount run "$1/run" -t tmpfs -o nosuid,nodev,mode=0755 &&
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# track_mount tmp "$1/tmp" -t tmpfs -o mode=1777,strictatime,nodev,nosuid
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# }
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#
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# chroot_umount() {
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# umount "${CHROOT_ACTIVE_MOUNTS[@]}"
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# }
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# valid_number_of_base() {
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# local base=$1 len=${#2} i=
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#
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# for (( i = 0; i < len; i++ )); do
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# { _=$(( $base#${2:i:1} )) || return 1; } 2>/dev/null
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# done
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#
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# return 0
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# }
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#
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# mangle() {
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# local i= chr= out=
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#
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# unset {a..f} {A..F}
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#
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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+=$chr
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# done
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#
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# printf '%s' "$out"
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# }
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#
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# unmangle() {
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# local i= chr= out= len=$(( ${#1} - 4 ))
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#
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# unset {a..f} {A..F}
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#
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# for (( i = 0; i < len; i++ )); do
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# chr=${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+=$chr
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# done
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#
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# printf '%s' "$out${1:i}"
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# }
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#
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# dm_name_for_devnode() {
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# read dm_name <"/sys/class/block/${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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#
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# fstype_has_fsck() {
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# (( fsck_types["$1"] ))
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# }
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#
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source @libdir@/functions.sh
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usage() {
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cat <<EOF
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usage: ${0##*/} chroot-dir [command]
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-h Print this help message
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If 'command' is unspecified, ${0##*/} will launch /bin/sh.
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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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chrootdir=$1
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shift
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[[ -d $chrootdir ]] || die "Can't create chroot on non-directory %s" "$chrootdir"
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api_fs_mount "$chrootdir" || die "failed to setup API filesystems in chroot %s" "$chrootdir"
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track_mount /etc/resolv.conf "$chrootdir/etc/resolv.conf" --bind
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SHELL=/bin/sh chroot "$chrootdir" "$@"
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