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proot-distro.sh
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proot-distro.sh
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#!@TERMUX_PREFIX@/bin/bash
# shellcheck disable=SC2239
##
## Script for managing PRoot containers with Linux distributions.
##
## Originally created by Leonid Pliushch <sylirre@termux.dev> for Termux
## project.
##
## 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 3 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/>.
##
PROGRAM_VERSION="4.13.0"
#############################################################################
##
## >>> CONTRIBUTOR'S NOTICE <<<
##
## By contributing to the PRoot-Distro project you are obligated to follow
## the next mandatory rules:
##
## 1. The PRoot-Distro project is built around PRoot and is intended to be
## developed as a wrapper around PRoot. Supporting classical Linux chroot
## is outside of the project scope.
##
## 2. The PRoot-Distro is designed to work only in Termux. Supporting other
## distributions where PRoot is available is out of scope.
##
## 3. The PRoot-Distro is intended to be used by a non-root user. Using it
## as superuser (root) is possible but has a potential of messing up
## ownership of Termux environment directories and in some cases it also
## may wipe Android device data completely.
##
## The measures such as checking current user id must be used to prevent
## using PRoot-Distro by the root user.
##
## 4. PRoot-Distro is not a generic tool. Its idea is to provide user a
## high level intrument for managing Linux distributions for PRoot and
## hide the all underlying routines and automate everything that is
## possible. It is not all-in-one swiss-knife framework for PRoot.
## Therefore PRoot-Distro does not provide a way to modify its behavior.
##
## ***
##
## 5. Follow the general design.
##
## Proot Distro has a specific, well defined structure which makes it
## unique and separates from analogous projects. This structure expected
## to be followed during whole project lifetime. If you have ideas
## how to restructure the PRoot-Distro, then please keep them in your
## own fork! Source customization is not welcome.
##
## 5.1 PRoot-Distro is written in Bash script language with using features
## which are not compatible with POSIX shell. The script itself is
## monolithic and is not supposed to be split on multiple parts.
##
## 5.2 The tabs must be used for indenting code blocks everywhere.
##
## 5.3 All features are split on functions. There are 3 types of functions:
##
## * Commands: implement specific features of PRoot-Distro such as
## install, backup, login the distribution. These functions have
## following name scheme: 'command_name()'.
## * Command help: supplementary functions implementing informational
## output describing usage of PRoot-Distro commands. These functions
## are named as 'command_name_help()' and are defined AFTER the
## commands.
## * Utility functions: reusable or very long pieces of code.
##
## 5.4 Each command function definition should begin with comment section.
##
## Comment sections logically separate functions on groups and provide
## a brief overview which part of PRoot-Distro is implemented here. The
## comment must provide a description of how the function works.
##
## Utility functions are allowed to have a very brief description and
## command help functions.
##
## Command help functions should not have comments. They are self
## descriptive.
##
## 5.5 Code pieces that do non-obvious actions must be commented.
##
## 5.6 Functions are not allowed to define global variables. Use 'local'
## keyword to define the local variables instead.
##
## 5.7 Global variables must be defined either at beginning of PRoot-Distro
## script or at the entry point.
##
## 5.8 Use of getopt for options handling is considered as non-flexible
## and thus not allowed.
##
## 5.9 The checks for error conditions must be implemented. If error has
## been encountered, a message should be printed on stderr and further
## execution should be terminated.
##
## 5.10 If error was encountered inside function, exiting should be done
## using the command 'return 1' to pass a status code to the caller.
## Use of exit command is not allowed unless used in script entry point.
##
## 5.11 User input in command functions must be validated during the
## command line arguments handling.
##
## 5.12 Use heredocs to write files, especially if their content is long.
##
## 5.13 Certain configuration such as plug-in directory path may be set only
## during installation of the PRoot-Distro. Such configuration is
## treated as persistent and should not be changed by user.
##
## 5.14 PRoot-Distro uses string place holders to define certain common
## values for some variables:
##
## * @TERMUX_APP_PACKAGE@ - sets Termux app package (com.termux).
## * @TERMUX_PREFIX@ - sets the installation prefix path.
## * @TERMUX_HOME@ - sets the Termux home directory path.
##
## It is not allowed to hardcode the mentioned values instead of using
## the place holder.
##
## ***
##
## 6. All informational messages are printed in specific format.
##
## 6.1 Use function 'msg' to print messages.
##
## 6.2 Messages printed by help functions must fit in 76 columns. If the
## message is too long, split in on multiple lines. This is not relevant
## to errors and other informational messages. Pay extra attention to
## keep the message properly indented.
##
## 6.3 All messages printable by PRoot-Distro script must support colored
## text through the escape sequences defined below by variables such as
## RED (red), BRED (bold red text), YELLOW, BYELLOW, etc.
##
## 6.4 PRoot-Distro operation errors must have bold red color (${BRED}).
## The key information such as arguments caused an error should be
## encloded in quotes and highlighted by yellow color (${YELLOW}).
##
## 6.5 Messages should be terminated by ${RST} which resets the text colors
## and other attributes.
##
## 6.7 Informational messages produced by PRoot-Distro command steps must
## have the following format:
##
## ${BLUE}[${GREEN}*${BLUE}] ${CYAN}Message...${RST}"
##
## 6.8 If the step encountered a condition where a warning or error should
## be printed, the following message format should be used instead:
##
## ${BLUE}[${RED}!${BLUE}] ${CYAN}Warning message.${RST}
##
## ***
##
## 7. Handling distributions.
##
## 7.1 PRoot-Distro script is intended to be distribution-agnostic. That
## means it treats all distributions equally and handles them in the
## same way despite the possible differences at level of distribition
## root file system package.
##
## 7.2 Support of specific distribution is enabled by using a plug-in. The
## plug-in is a Bash script that is sourced by PRoot-Distro and has the
## following format:
##
## DISTRO_NAME="Example"
## DISTRO_COMMENT="Example distribution."
##
## TARBALL_STRIP_OPT=1
##
## TARBALL_URL['aarch64']="https://example.com/archive-aarch64.tar.gz"
## TARBALL_URL['arm']="https://example.com/archive-armv7.tar.gz"
## TARBALL_URL['i686']="https://example.com/archive-i386.tar.gz"
## TARBALL_URL['x86_64']="https://example.com/archive-amd64.tar.gz"
##
## TARBALL_SHA256['aarch64']="0000000000000000000000000000000000000000000000000000000000000000"
## TARBALL_SHA256['arm']="0000000000000000000000000000000000000000000000000000000000000000"
## TARBALL_SHA256['i686']="0000000000000000000000000000000000000000000000000000000000000000"
## TARBALL_SHA256['x86_64']="0000000000000000000000000000000000000000000000000000000000000000"
##
## distro_setup() {
## run_proot_cmd touch /etc/hello-world
## run_proot_cmd bash -c "echo '127.0.0.1 hello-world' >> /etc/hosts"
## }
##
## 7.4 The variable DISTRO_NAME specifies a full name of distribution such
## as "Ubuntu" or "Debian (stable)". This variable is mandatory.
##
## 7.3 The variable TARBALL_URL is a Bash associative array which contains
## URLs to distribution rootfs tarball for given CPU architectures.
## This variable is mandatory.
##
## 7.4 The variable TARBALL_SHA256 is a Bash associative array which
## contains SHA-256 checksums of rootfs tarballs for given CPU
## architectures. This variable is mandatory.
##
## 7.5 Post-installation steps that may be required for some distributions
## are defined in 'distro_setup()' function (optional). This function
## has access to all variables defined by PRoot-Distro during the
## execution of 'command_install()'.
##
## 7.6 Commands inside 'distro_setup()' that are intended to be executed in
## distribution environment must be defined as arguments of the
## command 'run_proot_cmd'.
##
## 7.7 Distributions must be adressed by their alias which in fact is a
## file name of plug-in except the extension part.
##
## 7.8 The alias files are located in $PREFIX/etc/proot-distro and have
## extensions .sh or .override.sh.
##
## * dist.sh name format is used for standard plug-ins.
## * dist2.override.sh name is used to indicate that this is a
## renamed distribution created by command 'rename' or by the
## option '--override-alias' of command 'install'.
##
## 7.9 The alias for distribution must be unique and PRoot-Distro should
## take care of that. User should not end with having two plug-ins
## for same alias, for example ubuntu.sh and ubuntu.override.sh.
##
## 7.10 The rootfs for distribution may be extracted only under PRoot
## session with active link2symlink extension.
##
## ***
##
## 8. Project versioning: major.minor.patch
##
## 8.1 Major version should be incremented when breaking changes were
## released. Examples are deprecated features, changed locations of
## files, command line format changes.
##
## 8.2 Minor version is incremented for significant but non-breaking
## changes such as added new features or upgraded distributions. The
## minor version is set to 0 when major version was incremented.
##
## 8.3 Patch version is incremented for small changes such as improvements
## to existing features and bug fixes. It is set to 0 when major or
## minor versions were incremented.
##
## ***
##
## 9. Warranty disclaimer.
##
## 9.1 PRoot-Distro has been created with aim to solve a specific range
## of tasks and its functionality may not align with your needs.
##
## 9.2 PRoot-Distro is a Bash script wrapper for PRoot. If PRoot does not
## work on your device, the PRoot-Distro will not work here as well.
## You shall not beg the authors of PRoot-Distro to fix the PRoot. Such
## requests will be ignored.
##
## 9.3 Certain functionality of PRoot-Distro relies on the Internet and
## services like GitHub. If you do not have the Internet connection or
## the GitHub is blocked by your ISP, then you may not be able to
## install distributions. Please do not beg for setting up a censorship
## resistant distribution tarball hosts.
##
## 9.4 The distributions are provided as-is, possibly with small changes
## to set of preinstalled packages and their configuration. Bugs that
## may exist in a specific distribution will not be fixed by authors
## of the PRoot-Distro.
##
## 9.5 PRoot-Distro authors make the final decision whether to accept
## submitted patches (pull requests) or not.
##
## 9.6 PRoot-Distro authors do not provide the time frames for fullfilling
## a specific request (new feature, etc).
##
## 9.7 PRoot-Distro does not have upgrade schedule. Authors work on the
## project development whenever have opportunity and desire to do so.
## Releases are submitted when ready. There no alpha or beta builds.
##
#############################################################################
#############################################################################
#
# GLOBAL ENVIRONMENT AND INSTALLATION-SPECIFIC CONFIGURATION
#
set -e -u
# Override user-defined PATH.
export PATH="@TERMUX_PREFIX@/bin"
# Reference this where need to retrieve program name.
PROGRAM_NAME=$(basename "$(realpath "$0")")
# Where distribution plug-ins are stored.
DISTRO_PLUGINS_DIR="@TERMUX_PREFIX@/etc/proot-distro"
# Base directory where script keeps runtime data.
RUNTIME_DIR="@TERMUX_PREFIX@/var/lib/proot-distro"
# Where rootfs tarballs are downloaded.
DOWNLOAD_CACHE_DIR="${RUNTIME_DIR}/dlcache"
# Where extracted rootfs are stored.
INSTALLED_ROOTFS_DIR="${RUNTIME_DIR}/installed-rootfs"
# Default name servers.
DEFAULT_PRIMARY_NAMESERVER="8.8.8.8"
DEFAULT_SECONDARY_NAMESERVER="8.8.4.4"
# PATH environment variable for distributions.
DEFAULT_PATH_ENV="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/games:/usr/games:@TERMUX_PREFIX@/bin:/system/bin:/system/xbin"
# Default fake kernel version.
# Note: faking kernel version is required when using PRoot-Distro on
# old devices that are not compatible with up-to-date versions of GNU libc.
DEFAULT_FAKE_KERNEL_VERSION="6.2.1-PRoot-Distro"
# Emulator type for x86_64 systems.
# Can be either BLINK or QEMU.
: "${PROOT_DISTRO_X64_EMULATOR:=QEMU}"
# Colors.
if [ -n "$(command -v tput)" ] && [ "$(tput colors 2>/dev/null || echo 0)" -ge 8 ] && [ -z "${PROOT_DISTRO_FORCE_NO_COLORS-}" ]; then
RST="$(tput sgr0)"
RED="${RST}$(tput setaf 1)"
BRED="${RST}$(tput bold)$(tput setaf 1)"
GREEN="${RST}$(tput setaf 2)"
YELLOW="${RST}$(tput setaf 3)"
BYELLOW="${RST}$(tput bold)$(tput setaf 3)"
IYELLOW="${RST}$(tput sitm)$(tput setaf 3)"
BLUE="${RST}$(tput setaf 4)"
MAGENTA="${RST}$(tput setaf 5)"
CYAN="${RST}$(tput setaf 6)"
BCYAN="${RST}$(tput bold)$(tput setaf 6)"
ICYAN="${RST}$(tput sitm)$(tput setaf 6)"
else
RED=""
BRED=""
GREEN=""
YELLOW=""
BYELLOW=""
IYELLOW=""
BLUE=""
MAGENTA=""
CYAN=""
BCYAN=""
ICYAN=""
RST=""
fi
# Disable termux-exec or other things which may interfere with proot.
# It is expected that all dependencies have fixed hardcoded paths according
# to Termux file system layout.
unset LD_PRELOAD
# Override umask
umask 0022
#############################################################################
#
# FUNCTION TO PRINT A MESSAGE TO CONSOLE
#
# Prints a given text string to stderr. Supports escape sequences.
#
#############################################################################
msg() {
echo -e "$@" >&2
}
#############################################################################
#
# DEPENDENCY CHECK
#
# Make sure all needed utilities are available in PATH before continuing.
#
#############################################################################
for i in awk basename bzip2 cat chmod cp curl cut du find grep gzip \
head id mkdir proot rm sed tar xargs xz; do
if [ -z "$(command -v "$i")" ]; then
msg
msg "${BRED}Utility '${i}' is not installed. Cannot continue.${RST}"
msg
exit 1
fi
done
unset i
# Notify user if bin/bash is not a GNU Bash.
if ! grep -q '^GNU bash' <(bash --version 2>/dev/null | head -n 1); then
msg
msg "${BRED}Warning: bash binary that is available in PATH appears to be not a GNU bash. You may experience issues during installation, backup and restore operations.${RST}"
msg
fi
# Notify user if tar available in PATH is not GNU tar.
if ! grep -q '^tar (GNU tar)' <(tar --version 2>/dev/null | head -n 1); then
msg
msg "${BRED}Warning: tar binary that is available in PATH appears to be not a GNU tar. You may experience issues during installation, backup and restore operations.${RST}"
msg
fi
#############################################################################
#
# ANTI ROOT FUSE
#
# This script should never be executed as root as can mess up the ownership,
# and SELinux labels in $PREFIX.
#
#############################################################################
if [ "$(id -u)" = "0" ]; then
msg
msg "${BRED}Error: ${PROGRAM_NAME} should not be executed as root user.${RST}"
msg
exit 1
fi
#############################################################################
#
# ANTI NESTED PROOT FUSE
#
# Nested PRoot usage leads to performance degradation and other issues.
#
#############################################################################
TRACER_PID=$(grep TracerPid "/proc/$$/status" | cut -d $'\t' -f 2)
if [ "$TRACER_PID" != 0 ]; then
TRACER_NAME=$(grep Name "/proc/${TRACER_PID}/status" | cut -d $'\t' -f 2)
if [ "$TRACER_NAME" = "proot" ]; then
msg
msg "${BRED}Error: ${PROGRAM_NAME} should not be executed under PRoot.${RST}"
msg
exit 1
fi
unset TRACER_NAME
fi
unset TRACER_PID
#############################################################################
#
# FUNCTION TO INSTALL THE SPECIFIED DISTRIBUTION
#
# Brief algorithm how it works:
#
# 1. Process arguments supplied to 'install' command.
# 2. Ensure that requested distribution is supported and is not installed.
# 3. Source the distribution configuration plug-in.
# 4. Download the tarball of rootfs for requested distribution unless found
# in cache.
# 5. Verify SHA-256 checksum of the rootfs tarball.
# 6. Extract the rootfs under PRoot with link2symlink extension enabled.
# 7. Perform post-installation actions on distribution to make it ready.
#
#############################################################################
command_install() {
local distro_name
local override_alias
local distro_plugin_script
while (($# >= 1)); do
case "$1" in
--)
shift 1
break
;;
-h|--help)
command_install_help
return 0
;;
--override-alias)
if [ $# -ge 2 ]; then
shift 1
if [ -z "$1" ]; then
msg
msg "${BRED}Error: argument to option '${YELLOW}--override-alias${BRED}' should not be empty.${RST}"
command_install_help
return 1
fi
if ! grep -qP '^[a-z0-9][a-z0-9_.+\-]*$' <<< "$1"; then
msg
msg "${BRED}Error: argument to option '${YELLOW}--override-alias${BRED}' should start only with an alphanumeric character and consist of alphanumeric characters including symbols '_.+-'."
msg
return 1
fi
if grep -qP '^.*\.sh$' <<< "$1"; then
msg
msg "${BRED}Error: argument to option '${YELLOW}--override-alias${BRED}' should not end with '.sh'.${RST}"
msg
return 1
fi
override_alias="$1"
else
msg
msg "${BRED}Error: option '${YELLOW}--override-alias${BRED}' requires an argument.${RST}"
command_install_help
return 1
fi
;;
-*)
msg
msg "${BRED}Error: got unknown option '${YELLOW}${1}${BRED}'.${RST}"
command_install_help
return 1
;;
*)
if [ -z "${distro_name-}" ]; then
if [ -z "$1" ]; then
msg
msg "${BRED}Error: distribution alias argument should not be empty.${RST}"
command_install_help
return 1
fi
distro_name="$1"
else
msg
msg "${BRED}Error: got excessive positional argument '${YELLOW}${1}${BRED}'. Note that distribution can be specified only once.${RST}"
command_install_help
return 1
fi
;;
esac
shift 1
done
if [ -z "${distro_name-}" ]; then
msg
msg "${BRED}Error: distribution alias is not specified.${RST}"
command_install_help
return 1
fi
if [ -z "${SUPPORTED_DISTRIBUTIONS["$distro_name"]+x}" ]; then
msg
msg "${BRED}Error: unknown distribution '${YELLOW}${distro_name}${BRED}' was requested to be installed.${RST}"
msg
msg "${CYAN}View supported distributions by: ${GREEN}${PROGRAM_NAME} list${RST}"
msg
return 1
fi
if grep -qiP '(kali|parrot|nethunter|blackarch)' <<< "$distro_name" || grep -qiP '^nh$' <<< "$distro_name"; then
msg
show_donate
msg
msg "${MAGENTA}No, you won't get a Kali Linux for this :)${RST}"
msg
return 1
fi
if [ -n "${override_alias-}" ]; then
if [ ! -e "${DISTRO_PLUGINS_DIR}/${override_alias}.sh" ] && [ ! -e "${DISTRO_PLUGINS_DIR}/${override_alias}.override.sh" ]; then
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Creating file '${DISTRO_PLUGINS_DIR}/${override_alias}.override.sh'...${RST}"
distro_plugin_script="${DISTRO_PLUGINS_DIR}/${override_alias}.override.sh"
cp "${DISTRO_PLUGINS_DIR}/${distro_name}.sh" "${distro_plugin_script}"
sed -i "s/^\(DISTRO_NAME=\)\(.*\)\$/\1\"${SUPPORTED_DISTRIBUTIONS["$distro_name"]} - ${override_alias}\"/g" "${distro_plugin_script}"
SUPPORTED_DISTRIBUTIONS["${override_alias}"]="${SUPPORTED_DISTRIBUTIONS["$distro_name"]}"
distro_name="${override_alias}"
else
msg
msg "${BRED}Error: distribution with alias '${YELLOW}${override_alias}${BRED}' already exists.${RST}"
msg
return 1
fi
else
distro_plugin_script="${DISTRO_PLUGINS_DIR}/${distro_name}.sh"
# Try an alternate distribution name.
if [ ! -f "${distro_plugin_script}" ]; then
distro_plugin_script="${DISTRO_PLUGINS_DIR}/${distro_name}.override.sh"
fi
fi
if [ -d "${INSTALLED_ROOTFS_DIR}/${distro_name}" ]; then
msg
msg "${BRED}Error: distribution '${YELLOW}${distro_name}${BRED}' is already installed.${RST}"
msg
msg "${CYAN}Log in: ${GREEN}${PROGRAM_NAME} login ${distro_name}${RST}"
msg "${CYAN}Reinstall: ${GREEN}${PROGRAM_NAME} reset ${distro_name}${RST}"
msg "${CYAN}Uninstall: ${GREEN}${PROGRAM_NAME} remove ${distro_name}${RST}"
msg
return 1
fi
if [ -f "${distro_plugin_script}" ]; then
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Installing ${YELLOW}${SUPPORTED_DISTRIBUTIONS["$distro_name"]}${CYAN}...${RST}"
# Make sure things are cleared up on failure or user requested exit.
# shellcheck disable=SC2064 # variables must expand here
trap "echo -e \"\\r\\e[2K${BLUE}[${RED}!${BLUE}] ${CYAN}Exiting due to failure.${RST}\"; chmod -R u+rwx \"${INSTALLED_ROOTFS_DIR:?}/${distro_name:?}\"; rm -rf \"${INSTALLED_ROOTFS_DIR:?}/${distro_name:?}\"; [ -e \"${DISTRO_PLUGINS_DIR}/${distro_name}.override.sh\" ] && rm -f \"${DISTRO_PLUGINS_DIR}/${distro_name}.override.sh\"; exit 1;" EXIT
# shellcheck disable=SC2064 # variables must expand here
trap "trap - EXIT; echo -e \"\\r\\e[2K${BLUE}[${RED}!${BLUE}] ${CYAN}Exiting immediately as requested.${RST}\"; chmod -R u+rwx \"${INSTALLED_ROOTFS_DIR:?}/${distro_name:?}\"; rm -rf \"${INSTALLED_ROOTFS_DIR:?}/${distro_name:?}\"; [ -e \"${DISTRO_PLUGINS_DIR}/${distro_name}.override.sh\" ] && rm -f \"${DISTRO_PLUGINS_DIR}/${distro_name}.override.sh\"; exit 1;" HUP INT TERM
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Creating directory '${INSTALLED_ROOTFS_DIR}/${distro_name}'...${RST}"
mkdir -p "${INSTALLED_ROOTFS_DIR}/${distro_name}"
export PROOT_L2S_DIR="${INSTALLED_ROOTFS_DIR}/${distro_name}/.l2s"
if [ ! -d "${INSTALLED_ROOTFS_DIR}/${distro_name}/.l2s" ]; then
echo -e "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Creating directory '${PROOT_L2S_DIR}'...${RST}"
mkdir -p "$PROOT_L2S_DIR"
fi
# This should be overridden in distro plug-in with valid URL for
# each architecture where possible.
TARBALL_URL["aarch64"]=""
TARBALL_URL["arm"]=""
TARBALL_URL["i686"]=""
TARBALL_URL["x86_64"]=""
# This should be overridden in distro plug-in with valid SHA-256
# for corresponding tarballs.
TARBALL_SHA256["aarch64"]=""
TARBALL_SHA256["arm"]=""
TARBALL_SHA256["i686"]=""
TARBALL_SHA256["x86_64"]=""
# If your content inside tarball isn't stored in subdirectory,
# you can override this variable in distro plug-in with 0.
TARBALL_STRIP_OPT=1
# Distribution plug-in contains steps on how to get download URL
# and further post-installation configuration.
# shellcheck disable=SC1090
source "${distro_plugin_script}"
# Cannot proceed without URL and SHA-256.
if [ -z "${TARBALL_URL["$DISTRO_ARCH"]}" ]; then
msg "${BLUE}[${RED}!${BLUE}] ${CYAN}The distribution download URL is not defined for CPU architecture '${DISTRO_ARCH}'.${RST}"
return 1
fi
if ! grep -qP '^[0-9a-fA-F]{64}$' <<< "${TARBALL_SHA256["$DISTRO_ARCH"]}"; then
msg
msg "${BRED}Error: got malformed SHA-256 from plug-in script '${distro_plugin_script}'.${RST}"
msg
return 1
fi
if [ ! -d "$DOWNLOAD_CACHE_DIR" ]; then
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Creating directory '$DOWNLOAD_CACHE_DIR'...${RST}"
mkdir -p "$DOWNLOAD_CACHE_DIR"
fi
local tarball_name
tarball_name=$(basename "${TARBALL_URL["$DISTRO_ARCH"]}")
if [ ! -f "${DOWNLOAD_CACHE_DIR}/${tarball_name}" ]; then
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Downloading rootfs tarball...${RST}"
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}URL: ${TARBALL_URL["$DISTRO_ARCH"]}${RST}"
# Using temporary file as script can't distinguish the partially
# downloaded file from the complete. Useful in case if curl will
# fail for some reason.
msg
rm -f "${DOWNLOAD_CACHE_DIR}/${tarball_name}.tmp"
if ! curl --disable --fail --retry 5 --retry-connrefused --retry-delay 5 --location \
--output "${DOWNLOAD_CACHE_DIR}/${tarball_name}.tmp" "${TARBALL_URL["$DISTRO_ARCH"]}"; then
msg
msg "${BLUE}[${RED}!${BLUE}] ${CYAN}Download failure, please check your network connection.${RST}"
rm -f "${DOWNLOAD_CACHE_DIR}/${tarball_name}.tmp"
return 1
fi
msg
# If curl finished successfully, rename file to original.
mv -f "${DOWNLOAD_CACHE_DIR}/${tarball_name}.tmp" "${DOWNLOAD_CACHE_DIR}/${tarball_name}"
else
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Using cached rootfs tarball...${RST}"
fi
if [ -n "${TARBALL_SHA256["$DISTRO_ARCH"]}" ]; then
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Checking integrity, please wait...${RST}"
local actual_sha256
actual_sha256=$(sha256sum "${DOWNLOAD_CACHE_DIR}/${tarball_name}" | awk '{ print $1}')
if [ "${TARBALL_SHA256["$DISTRO_ARCH"]}" != "${actual_sha256}" ]; then
msg "${BLUE}[${RED}!${BLUE}] ${CYAN}Integrity checking failed. Try to redo installation again.${RST}"
rm -f "${DOWNLOAD_CACHE_DIR}/${tarball_name}"
return 1
fi
else
msg "${BLUE}[${RED}!${BLUE}] ${CYAN}Integrity checking of downloaded rootfs has been disabled.${RST}"
fi
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Extracting rootfs, please wait...${RST}"
# --exclude='dev' - need to exclude /dev directory which may contain device files.
# --delay-directory-restore - set directory permissions only when files were extracted
# to avoid issues with Arch Linux bootstrap archives.
set +e
proot --link2symlink \
tar -C "${INSTALLED_ROOTFS_DIR}/${distro_name}" --warning=no-unknown-keyword \
--delay-directory-restore --preserve-permissions --strip="${TARBALL_STRIP_OPT}" \
-xf "${DOWNLOAD_CACHE_DIR}/${tarball_name}" --exclude='dev' |& grep -v "/linkerconfig/" >&2
set -e
# If no /etc in rootfs, terminate installation.
# This usually indicates that downloaded distribution tarball doesn't contain
# actual rootfs, wrong tar strip option was specified or the distribution has
# high grade of customization and doesn't respect FHS standard.
if [ ! -e "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc" ]; then
msg
msg "${BRED}Error: the rootfs of distribution '${YELLOW}${distro_name}${BRED}' has unexpected structure (no /etc directory). Make sure that variable TARBALL_STRIP_OPT specified in distribution plug-in is correct.${RST}"
msg
return 1
fi
# Write important environment variables to /etc/environment.
chmod u+rw "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/environment" >/dev/null 2>&1 || true
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Writing file '${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/environment'...${RST}"
for var in ANDROID_ART_ROOT ANDROID_DATA ANDROID_I18N_ROOT ANDROID_ROOT \
ANDROID_RUNTIME_ROOT ANDROID_TZDATA_ROOT BOOTCLASSPATH COLORTERM \
DEX2OATBOOTCLASSPATH EXTERNAL_STORAGE; do
set +u
if [ -n "${!var}" ]; then
echo "${var}=${!var}" >> "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/environment"
fi
set -u
done
unset var
# Don't touch these variables.
# TERM is being inherited from currect environment. Otherwise it is being
# set to xterm-256color (Termux app default).
cat <<- EOF >> "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/environment"
LANG=en_US.UTF-8
MOZ_FAKE_NO_SANDBOX=1
PATH=${DEFAULT_PATH_ENV}
PULSE_SERVER=127.0.0.1
TERM=${TERM-xterm-256color}
TMPDIR=/tmp
EOF
# Fix PATH in some configuration files.
for f in /etc/bash.bashrc /etc/profile /etc/login.defs; do
[ ! -e "${INSTALLED_ROOTFS_DIR}/${distro_name}${f}" ] && continue
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Updating PATH in '${INSTALLED_ROOTFS_DIR}/${distro_name}${f}' if needed...${RST}"
sed -i -E "s@\<(PATH=)(\"?[^\"[:space:]]+(\"|\$|\>))@\1\"${DEFAULT_PATH_ENV}\"@g" \
"${INSTALLED_ROOTFS_DIR}/${distro_name}${f}"
done
unset f
# Default /etc/resolv.conf may be empty or unsuitable for use.
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Creating file '${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/resolv.conf'...${RST}"
rm -f "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/resolv.conf"
cat <<- EOF > "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/resolv.conf"
nameserver ${DEFAULT_PRIMARY_NAMESERVER}
nameserver ${DEFAULT_SECONDARY_NAMESERVER}
EOF
# Default /etc/hosts may be empty or incomplete.
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Creating file '${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/hosts'...${RST}"
chmod u+rw "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/hosts" >/dev/null 2>&1 || true
cat <<- EOF > "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/hosts"
# IPv4.
127.0.0.1 localhost.localdomain localhost
# IPv6.
::1 localhost.localdomain localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
EOF
# Add Android-specific UIDs/GIDs to /etc/group and /etc/gshadow.
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Registering Android-specific UIDs and GIDs...${RST}"
chmod u+rw "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/passwd" \
"${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/shadow" \
"${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/group" \
"${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/gshadow" >/dev/null 2>&1 || true
echo "aid_$(id -un):x:$(id -u):$(id -g):Termux:/:/sbin/nologin" >> \
"${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/passwd"
echo "aid_$(id -un):*:18446:0:99999:7:::" >> \
"${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/shadow"
local group_name group_id
while read -r group_name group_id; do
echo "aid_${group_name}:x:${group_id}:root,aid_$(id -un)" \
>> "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/group"
if [ -f "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/gshadow" ]; then
echo "aid_${group_name}:*::root,aid_$(id -un)" \
>> "${INSTALLED_ROOTFS_DIR}/${distro_name}/etc/gshadow"
fi
done < <(paste <(id -Gn | tr ' ' '\n') <(id -G | tr ' ' '\n'))
# Ensure that proot will be able to bind fake /proc entries.
setup_fake_proc
# Run optional distro-specific hook.
if declare -f -F distro_setup >/dev/null 2>&1; then
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Running distribution-specific configuration steps...${RST}"
(cd "${INSTALLED_ROOTFS_DIR}/${distro_name}"
distro_setup
)
fi
# Reset trap for HUP/INT/TERM.
trap - EXIT
trap 'echo -e "\\r\\e[2K${BLUE}[${RED}!${BLUE}] ${CYAN}Exiting immediately as requested.${RST}"; exit 1;' HUP INT TERM
msg "${BLUE}[${GREEN}*${BLUE}] ${CYAN}Finished.${RST}"
msg
msg "${CYAN}Log in with: ${GREEN}${PROGRAM_NAME} login ${distro_name}${CYAN}${RST}"
msg
return 0
else
# Reset trap for HUP/INT/TERM.
trap - EXIT
trap 'echo -e "\\r\\e[2K${BLUE}[${RED}!${BLUE}] ${CYAN}Exiting immediately as requested.${RST}"; exit 1;' HUP INT TERM
msg "${BLUE}[${RED}!${BLUE}] ${CYAN}Cannot find '${distro_plugin_script}' which is used to define a distribution properties.${RST}"
return 1
fi
}
# Special function for executing a command inside rootfs.
# Intended to be used inside plug-in distro_setup() function.
# shellcheck disable=SC2317 # run_proot_cmd called indirectly
run_proot_cmd() {
if [ -z "${distro_name-}" ]; then
msg
msg "${BRED}Error: called run_proot_cmd() but \${distro_name} is not set. Make sure that run_proot_cmd() is used inside distro_setup() function.${RST}"
msg
return 1
fi
if [ -z "${DISTRO_ARCH-}" ]; then
msg
msg "${BRED}Error: called run_proot_cmd() but \${DISTRO_ARCH} is not set.${RST}"
msg
return 1
fi
local cpu_emulator_arg=""
if [ "$DISTRO_ARCH" != "$DEVICE_CPU_ARCH" ]; then
local cpu_emulator_path=""
# If CPU and host OS are 64bit, we can run 32bit guest OS without emulation.
# Everything else requires emulator (QEMU).
case "$DISTRO_ARCH" in
aarch64) cpu_emulator_path="@TERMUX_PREFIX@/bin/qemu-aarch64";;
arm)
if [ "$DEVICE_CPU_ARCH" != "aarch64" ]; then
cpu_emulator_path="@TERMUX_PREFIX@/bin/qemu-arm"
fi
;;
i686)
if [ "$DEVICE_CPU_ARCH" != "x86_64" ]; then
cpu_emulator_path="@TERMUX_PREFIX@/bin/qemu-i386"
fi
;;
x86_64)
if [ "$PROOT_DISTRO_X64_EMULATOR" = "QEMU" ]; then
cpu_emulator_path="@TERMUX_PREFIX@/bin/qemu-x86_64"
elif [ "$PROOT_DISTRO_X64_EMULATOR" = "BLINK" ]; then
cpu_emulator_path="@TERMUX_PREFIX@/bin/blink"
else
msg
msg "${BRED}Error: PROOT_DISTRO_X64_EMULATOR has unknown value '$PROOT_DISTRO_X64_EMULATOR'. Valid values are: BLINK, QEMU."
msg
fi
;;
*)
msg
msg "${BRED}Error: DISTRO_ARCH has unknown value '$DISTRO_ARCH'. Valid values are: aarch64, arm, i686, x86_64."
msg
return 1
;;
esac
if [ -n "$cpu_emulator_path" ]; then
if [ -x "$cpu_emulator_path" ]; then
cpu_emulator_arg="-q ${cpu_emulator_path}"
else
local cpu_emulator_pkg=""
case "$DISTRO_ARCH" in
aarch64) cpu_emulator_pkg="qemu-user-aarch64";;
arm) cpu_emulator_pkg="qemu-user-arm";;
i686) cpu_emulator_pkg="qemu-user-i386";;
x86_64)
if [ "$PROOT_DISTRO_X64_EMULATOR" = "QEMU" ]; then
cpu_emulator_pkg="qemu-user-x86-64"
elif [ "$PROOT_DISTRO_X64_EMULATOR" = "BLINK" ]; then
cpu_emulator_pkg="blink"
else
msg
msg "${BRED}Error: PROOT_DISTRO_X64_EMULATOR has unknown value '$PROOT_DISTRO_X64_EMULATOR'. Valid values are: BLINK, QEMU."
msg
fi
;;
*) cpu_emulator_pkg="qemu-user-${DISTRO_ARCH}";;
esac
msg
msg "${BRED}Error: package '${cpu_emulator_pkg}' is not installed.${RST}"
msg
return 1
fi
fi
fi
if [ -n "$cpu_emulator_arg" ]; then
if [ -d "/apex" ]; then
cpu_emulator_arg="${cpu_emulator_arg} --bind=/apex"
fi
if [ -e "/linkerconfig/ld.config.txt" ]; then
cpu_emulator_arg="${cpu_emulator_arg} --bind=/linkerconfig/ld.config.txt"
fi
cpu_emulator_arg="${cpu_emulator_arg} --bind=@TERMUX_PREFIX@"
cpu_emulator_arg="${cpu_emulator_arg} --bind=/system"
cpu_emulator_arg="${cpu_emulator_arg} --bind=/vendor"
if [ -f "/plat_property_contexts" ]; then
cpu_emulator_arg="${cpu_emulator_arg} --bind=/plat_property_contexts"
fi
if [ -f "/property_contexts" ]; then
cpu_emulator_arg="${cpu_emulator_arg} --bind=/property_contexts"
fi
fi
# shellcheck disable=SC2086 # ${cpu_emulator_arg} should expand into nothing rather than into ''.
proot ${cpu_emulator_arg} \
-L \
--kernel-release="${DEFAULT_FAKE_KERNEL_VERSION}" \
--link2symlink \
--kill-on-exit \
--rootfs="${INSTALLED_ROOTFS_DIR}/${distro_name}" \
--root-id \
--cwd=/root \
--bind=/dev \
--bind="/dev/urandom:/dev/random" \
--bind=/proc \
--bind="/proc/self/fd:/dev/fd" \
--bind="/proc/self/fd/0:/dev/stdin" \
--bind="/proc/self/fd/1:/dev/stdout" \
--bind="/proc/self/fd/2:/dev/stderr" \
--bind=/sys \
--bind="${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.loadavg:/proc/loadavg" \
--bind="${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.stat:/proc/stat" \
--bind="${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.uptime:/proc/uptime" \
--bind="${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.version:/proc/version" \
--bind="${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.vmstat:/proc/vmstat" \
--bind="${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.sysctl_entry_cap_last_cap:/proc/sys/kernel/cap_last_cap" \
/usr/bin/env -i \
"HOME=/root" \
"LANG=C.UTF-8" \
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" \
"TERM=${TERM-xterm-256color}" \
"TMPDIR=/tmp" \
"$@"
}
# A function for preparing fake content for certain /proc entries which are
# known to have restricted access on Android OS. All entries are based on
# values retrieved from Arch Linux (x86_64) running on a VM with 8 CPUs and 8
# GiB of memory. Date 2023.03.28, Linux 6.2.1. Some values edited to fit
# the PRoot-Distro.
setup_fake_proc() {
mkdir -p "${INSTALLED_ROOTFS_DIR}/${distro_name}/proc"
chmod 700 "${INSTALLED_ROOTFS_DIR}/${distro_name}/proc"
if [ ! -f "${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.loadavg" ]; then
cat <<- EOF > "${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.loadavg"
0.12 0.07 0.02 2/165 765
EOF
fi
if [ ! -f "${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.stat" ]; then
cat <<- EOF > "${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.stat"
cpu 1957 0 2877 93280 262 342 254 87 0 0
cpu0 31 0 226 12027 82 10 4 9 0 0
cpu1 45 0 664 11144 21 263 233 12 0 0
cpu2 494 0 537 11283 27 10 3 8 0 0
cpu3 359 0 234 11723 24 26 5 7 0 0
cpu4 295 0 268 11772 10 12 2 12 0 0
cpu5 270 0 251 11833 15 3 1 10 0 0
cpu6 430 0 520 11386 30 8 1 12 0 0
cpu7 30 0 172 12108 50 8 1 13 0 0
intr 127541 38 290 0 0 0 0 4 0 1 0 0 25329 258 0 5777 277 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ctxt 140223
btime 1680020856
processes 772
procs_running 2
procs_blocked 0
softirq 75663 0 5903 6 25375 10774 0 243 11685 0 21677
EOF
fi
if [ ! -f "${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.uptime" ]; then
cat <<- EOF > "${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.uptime"
124.08 932.80
EOF
fi
if [ ! -f "${INSTALLED_ROOTFS_DIR}/${distro_name}/proc/.version" ]; then