root-enter: upgrade to 9
go back to shell script
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411F7B30801DD9CA
2 changed files with 94 additions and 74 deletions
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@ -1,13 +1,12 @@
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# Contributor: Patrycja Rosa <alpine@ptrcnull.me>
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# Maintainer: Patrycja Rosa <alpine@ptrcnull.me>
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pkgname=root-enter
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pkgver=8
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pkgver=9
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pkgrel=0
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pkgdesc="enter chroot with mounts"
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url="https://git.ddd.rip/ptrcnull/ptrcports"
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arch="noarch"
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license="BSD-2-Clause"
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depends="execline"
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source="enter"
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builddir="$srcdir"
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options="!check"
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@ -17,5 +16,5 @@ package() {
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}
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sha512sums="
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2c46100bb0c1a2a1b683d3e6070a970fcdd0bf688ccdfa3bcf4310b8f4ea0a69946a3a1b3cffec18af70eb09fb53a977a034318a7be4f103a864239880f4a1be enter
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4a054f60ded2e17c8eca35ff30b2e23b00dba58b7208f62121ffce849502838022f61ea2a1ddc4b6c80e63cbb33e1a331f1d7aecace5ada5bd6b0ae23cd790ea enter
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"
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163
root-enter/enter
163
root-enter/enter
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@ -1,83 +1,104 @@
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#!/bin/execlineb
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#!/bin/sh
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set -eu
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elgetopt "be:u:c:"
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# make sure we're root
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if [ "$(id -u)" != 0 ]; then
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sucmd="su -c"
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if command -v doas >/dev/null; then
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sucmd="doas"
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elif command -v sudo >/dev/null; then
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sucmd="sudo"
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fi
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multisubstitute {
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importas -D "0" build ELGETOPT_b
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importas -D "" extra_mounts ELGETOPT_e
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importas -D "" user_arg ELGETOPT_u
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importas -D "" command_arg ELGETOPT_c
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importas -D "" dest 1
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importas -i USER USER
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importas -i HOME HOME
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}
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exec $sucmd env HOME="$HOME" USERNAME="$(id -u -n)" "$0" "$@"
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fi
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# and make sure we're in a separate mount namespace
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if [ "$(readlink /proc/$$/ns/mnt | cut -d: -f2)" = "$(readlink /proc/1/ns/mnt | cut -d: -f2)" ]; then
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exec unshare -m "$0" "$@"
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fi
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bindpoints="/etc/resolv.conf"
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command=""
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user="$USERNAME"
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while getopts "be:u:c:" opt; do
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case $opt in
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'b') bindpoints="
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$bindpoints
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$HOME/aports
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$HOME/packages
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$HOME/.abuild
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" ;;
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'e') bindpoints="$bindpoints $OPTARG" ;;
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'u') user="$OPTARG" ;;
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'c') command="$OPTARG" ;;
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*) echo "unknown $opt" ;;
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esac
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done
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shift $(( $OPTIND - 1 ))
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dest="$1"
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shift
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elgetpositionals
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emptyenv -oP
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backtick -D "ash -l" command {
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ifelse { test -n $command_arg } {
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echo $command_arg
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}
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if [ ! -d "$dest" ]; then
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echo "no such directory: $dest"
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exit 1
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fi
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ifelse { test $# -gt 0 } {
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echo $@
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}
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if [ ! -x "$dest"/bin/sh ]; then
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echo "$dest does not contain executable /bin/sh"
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exit 1
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fi
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echo ash -l
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}
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importas -ui command command
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# TODO: add -s to that when not using `su` later
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mount -t proc proc "$dest"/proc
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mount -t sysfs sysfs "$dest"/sys
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mount -t tmpfs tmpfs "$dest"/tmp
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# some mini kernels don't have devtmpfs
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if grep -q devtmpfs /proc/filesystems; then
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mount -t devtmpfs devtmpfs "$dest"/dev
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else
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mount -t tmpfs tmpfs "$dest"/dev
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backtick -D "" -E user { ifelse { test -n $user_arg } { echo $user_arg } echo $USER }
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if [ -x "$dest"/sbin/mdev ]; then
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echo "devtmpfs not supported - running 'mdev -s' instead"
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chroot "$dest" /sbin/mdev -s
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else
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echo "devtmpfs not supported - devices need to be created manually"
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fi
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fi
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mount -t devpts devpts "$dest"/dev/pts
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mount -t tmpfs tmpfs "$dest"/dev/shm
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backtick -D "" -E build_mounts {
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if { test $build = 1 }
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echo "
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${HOME}/aports
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${HOME}/packages
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${HOME}/.abuild
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"
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}
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for bindpoint in $bindpoints; do
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if [ -f "$bindpoint" ]; then
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touch "$dest"/"$bindpoint"
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else
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mkdir -p "$dest"/"$bindpoint"
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fi
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define -s -C bindpoints "/etc/resolv.conf ${build_mounts} ${extra_mounts}"
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mount --bind "$bindpoint" "$dest"/"$bindpoint"
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done
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ifelse -n { test -d $dest } {
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foreground { echo "no such file or directory: $dest" }
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exit 1
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}
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# if running on chromeos, fixup symlink exec
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# https://goo.gl/8xICW6
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# https://github.com/dnschneid/crouton/commit/5cb7ad05
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if [ -e "/run/chrome" ]; then
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if mount -n -t securityfs -o nodev,noexec,nosuid securityfs /sys/kernel/security; then
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policies=/sys/kernel/security/chromiumos/inode_security_policies
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if [ -d "$policies" ]; then
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for policy in "$policies/allow_"*; do
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printf "$(realpath "$dest")" > "$policy"
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done
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fi
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umount /sys/kernel/security
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fi
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fi
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ifelse -n { test -x ${dest}/bin/sh } {
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foreground { echo "$dest does not contain executable /bin/sh" }
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exit 1
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}
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backtick -E uid { id -u }
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backtick -E -D "exec" sucmd { if { test $uid != 0 } echo doas }
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$sucmd
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unshare -m
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foreground { mount -t devtmpfs devtmpfs ${dest}/dev }
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foreground { mount -t tmpfs shm ${dest}/dev/shm }
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foreground { mount -t devpts devpts ${dest}/dev/pts }
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foreground { mount -t sysfs sysfs ${dest}/sys }
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foreground { mount -t proc proc ${dest}/proc }
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foreground { mount -t tmpfs tmpfs ${dest}/tmp }
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foreground {
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forx -E point { $bindpoints }
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# ensure $point exists in destination
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ifthenelse { test -f $point } {
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touch ${dest}${point}
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} {
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mkdir -p ${dest}${point}
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}
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mount --bind $point ${dest}${point}
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}
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chroot ${dest}
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su $user -c "$command"
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if [ "$command" ]; then
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exec chroot "$dest" su $user -c "$command"
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elif [ "$#" -gt 0 ]; then
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exec chroot "$dest" su $user -c "$*"
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else
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exec chroot "$dest" login -f $user
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fi
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