#!/usr/bin/env sh # shellcheck disable=SC3043 set -e MOTOR_PUBLIC_ROOT="${MOTOR_PUBLIC_ROOT:-https://public-download.motor.dev}" VERSION="${VERSION:-latest}" EXECUTABLE_NAMES="${EXECUTABLE_NAMES:-watt motor}" EXTENSION=".zst" main() { downloader --check need_cmd uname need_cmd mktemp need_cmd chmod need_cmd mkdir need_cmd zstd need_cmd rm need_cmd rmdir # Detect architecture; this tells us which binary to download get_architecture || return 1 local _arch="$RETVAL" assert_nz "$_arch" "arch" case "$_arch" in *windows*) echo "Unsupported architecture '$_arch'" exit 1 ;; esac print_info "Detected architecture $_arch" # Make a tmp directory to download the executable to local _dir if ! _dir="$(ensure mktemp -d)"; then exit 1 fi ensure mkdir -p "$_dir" local _retval=0 local _binary for _executable_name in $EXECUTABLE_NAMES; do local _zipped="${_executable_name}${EXTENSION}" # Generate the URL of the executable to download local _url="${MOTOR_PUBLIC_ROOT}/cli/${_arch}/${VERSION}/${_zipped}" print_info "Downloading compressed executable ${_executable_name} from $_url" # Download the file and make it executable local _file="${_dir}/$_zipped" ensure downloader "$_url" "$_file" "$_arch" print_info "Decompressing ${_executable_name}..." zstd -d --rm "$_file" _binary="${_file%"$EXTENSION"}" ensure chmod u+x "$_binary" if [ ! -x "$_binary" ]; then printf '%s\n' "Cannot execute $_binary (likely because of mounting /tmp as noexec)." 1>&2 exit 1 fi # Run the CLI "init" command (which will set up the home dir, copy the executable there, # and update the user's $PATH) ignore "$_binary" init local _cmd_ret=$? if [ "$_cmd_ret" -ne 0 ] && [ "$_retval" -eq 0 ]; then _retval="$_cmd_ret" fi # Remove the temporary file ignore rm "$_binary" done ignore rmdir "$_dir" return "$_retval" } is_zsh() { [ -n "${ZSH_VERSION-}" ] } # This wraps curl or wget. Try curl first, if not installed, # use wget instead. downloader() { # zsh does not split words by default, Required for curl retry arguments below. is_zsh && setopt local_options shwordsplit local _dld local _ciphersuites local _err local _status local _retry if check_cmd curl; then _dld=curl elif check_cmd wget; then _dld=wget else _dld='curl or wget' # to be used in error message of need_cmd fi if [ "$1" = --check ]; then need_cmd "$_dld" elif [ "$_dld" = curl ]; then check_curl_for_retry_support _retry="$RETVAL" get_ciphersuites_for_curl _ciphersuites="$RETVAL" if [ -n "$_ciphersuites" ]; then # shellcheck disable=SC2086 _err=$(curl $_retry --proto '=https' --tlsv1.2 --ciphers "$_ciphersuites" --silent --show-error --fail --location "$1" --output "$2" 2>&1) _status=$? else echo "Warning: Not enforcing strong cipher suites for TLS, this is potentially less secure" if ! check_help_for "$3" curl --proto --tlsv1.2; then echo "Warning: Not enforcing TLS v1.2, this is potentially less secure" # shellcheck disable=SC2086 _err=$(curl $_retry --silent --show-error --fail --location "$1" --output "$2" 2>&1) _status=$? else # shellcheck disable=SC2086 _err=$(curl $_retry --proto '=https' --tlsv1.2 --silent --show-error --fail --location "$1" --output "$2" 2>&1) _status=$? fi fi if [ -n "$_err" ]; then echo "$_err" >&2 if echo "$_err" | grep -q 404$; then err "installer for platform '$3' not found, this may be unsupported" fi fi return $_status elif [ "$_dld" = wget ]; then if [ "$(wget -V 2>&1|head -2|tail -1|cut -f1 -d" ")" = "BusyBox" ]; then echo "Warning: using the BusyBox version of wget. Not enforcing strong cipher suites for TLS or TLS v1.2, this is potentially less secure" _err=$(wget "$1" -O "$2" 2>&1) _status=$? else get_ciphersuites_for_wget _ciphersuites="$RETVAL" if [ -n "$_ciphersuites" ]; then _err=$(wget --https-only --secure-protocol=TLSv1_2 --ciphers "$_ciphersuites" "$1" -O "$2" 2>&1) _status=$? else echo "Warning: Not enforcing strong cipher suites for TLS, this is potentially less secure" if ! check_help_for "$3" wget --https-only --secure-protocol; then echo "Warning: Not enforcing TLS v1.2, this is potentially less secure" _err=$(wget "$1" -O "$2" 2>&1) _status=$? else _err=$(wget --https-only --secure-protocol=TLSv1_2 "$1" -O "$2" 2>&1) _status=$? fi fi fi if [ -n "$_err" ]; then echo "$_err" >&2 if echo "$_err" | grep -q ' 404 Not Found$'; then err "installer for platform '$3' not found, this may be unsupported" fi fi return $_status else err "Unknown downloader" # should not reach here fi } check_proc() { # Check for /proc by looking for the /proc/self/exe link # This is only run on Linux if ! test -L /proc/self/exe ; then err "fatal: Unable to find /proc/self/exe. Is /proc mounted? Installation cannot proceed without /proc." fi } get_bitness() { need_cmd head # Architecture detection without dependencies beyond coreutils. # ELF files start out "\x7fELF", and the following byte is # 0x01 for 32-bit and # 0x02 for 64-bit. # The printf builtin on some shells like dash only supports octal # escape sequences, so we use those. local _current_exe_head _current_exe_head=$(head -c 5 /proc/self/exe ) if [ "$_current_exe_head" = "$(printf '\177ELF\001')" ]; then echo 32 elif [ "$_current_exe_head" = "$(printf '\177ELF\002')" ]; then echo 64 else err "unknown platform bitness" fi } is_host_amd64_elf() { need_cmd head need_cmd tail # ELF e_machine detection without dependencies beyond coreutils. # Two-byte field at offset 0x12 indicates the CPU, # but we're interested in it being 0x3E to indicate amd64, or not that. local _current_exe_machine _current_exe_machine=$(head -c 19 /proc/self/exe | tail -c 1) [ "$_current_exe_machine" = "$(printf '\076')" ] } get_endianness() { # shellcheck disable=SC2086 local cputype=$1 # shellcheck disable=SC2086 local suffix_eb=$2 # shellcheck disable=SC2086 local suffix_el=$3 # detect endianness without od/hexdump, like get_bitness() does. need_cmd head need_cmd tail local _current_exe_endianness _current_exe_endianness="$(head -c 6 /proc/self/exe | tail -c 1)" if [ "$_current_exe_endianness" = "$(printf '\001')" ]; then echo "${cputype}${suffix_el}" elif [ "$_current_exe_endianness" = "$(printf '\002')" ]; then echo "${cputype}${suffix_eb}" else err "unknown platform endianness" fi } # Detect the Linux/LoongArch UAPI flavor, with all errors being non-fatal. # Returns 0 or 234 in case of successful detection, 1 otherwise (/tmp being # noexec, or other causes). check_loongarch_uapi() { need_cmd base64 local _tmp if ! _tmp="$(ensure mktemp)"; then return 1 fi # Minimal Linux/LoongArch UAPI detection, exiting with 0 in case of # upstream ("new world") UAPI, and 234 (-EINVAL truncated) in case of # old-world (as deployed on several early commercial Linux distributions # for LoongArch). # # See https://gist.github.com/xen0n/5ee04aaa6cecc5c7794b9a0c3b65fc7f for # source to this helper binary. ignore base64 -d > "$_tmp" <&2 echo 'Your Linux kernel does not provide the ABI required by this Motor' >&2 echo 'distribution. Please contact support.' >&2 echo >&2 exit 1 ;; *) echo "Warning: Cannot determine current system's ABI flavor. Please contact support." >&2 echo >&2 exit 1 ;; esac } get_architecture() { local _ostype _cputype _bitness _arch _clibtype _ostype="$(uname -s)" _cputype="$(uname -m)" _clibtype="gnu" if [ "$_ostype" = Linux ]; then if [ "$(uname -o)" = Android ]; then _ostype=Android fi if ldd --version 2>&1 | grep -q 'musl'; then _clibtype="musl" fi fi if [ "$_ostype" = Darwin ]; then # Darwin `uname -m` can lie due to Rosetta shenanigans. If you manage to # invoke a native shell binary and then a native uname binary, you can # get the real answer, but that's hard to ensure, so instead we use # `sysctl` (which doesn't lie) to check for the actual architecture. if [ "$_cputype" = i386 ]; then # Handling i386 compatibility mode in older macOS versions (<10.15) # running on x86_64-based Macs. # Starting from 10.15, macOS explicitly bans all i386 binaries from running. # See: # Avoid `sysctl: unknown oid` stderr output and/or non-zero exit code. if sysctl hw.optional.x86_64 2> /dev/null || true | grep -q ': 1'; then _cputype=x86_64 fi elif [ "$_cputype" = x86_64 ]; then # Handling x86-64 compatibility mode (a.k.a. Rosetta 2) # in newer macOS versions (>=11) running on arm64-based Macs. # Rosetta 2 is built exclusively for x86-64 and cannot run i386 binaries. # Avoid `sysctl: unknown oid` stderr output and/or non-zero exit code. if sysctl hw.optional.arm64 2> /dev/null || true | grep -q ': 1'; then _cputype=arm64 fi fi fi if [ "$_ostype" = SunOS ]; then # Both Solaris and illumos presently announce as "SunOS" in "uname -s" # so use "uname -o" to disambiguate. We use the full path to the # system uname in case the user has coreutils uname first in PATH, # which has historically sometimes printed the wrong value here. if [ "$(/usr/bin/uname -o)" = illumos ]; then _ostype=illumos fi # illumos systems have multi-arch userlands, and "uname -m" reports the # machine hardware name; e.g., "i86pc" on both 32- and 64-bit x86 # systems. Check for the native (widest) instruction set on the # running kernel: if [ "$_cputype" = i86pc ]; then _cputype="$(isainfo -n)" fi fi case "$_ostype" in Android) _ostype=linux-android ;; Linux) check_proc _ostype=unknown-linux-$_clibtype _bitness=$(get_bitness) ;; FreeBSD) _ostype=unknown-freebsd ;; NetBSD) _ostype=unknown-netbsd ;; DragonFly) _ostype=unknown-dragonfly ;; Darwin) _ostype=apple-darwin ;; illumos) _ostype=unknown-illumos ;; MINGW* | MSYS* | CYGWIN* | Windows_NT) _ostype=pc-windows-gnu ;; *) err "unrecognized OS type: $_ostype" ;; esac case "$_cputype" in i386 | i486 | i686 | i786 | x86) _cputype=i686 ;; xscale | arm) _cputype=arm if [ "$_ostype" = "linux-android" ]; then _ostype=linux-androideabi fi ;; armv6l) _cputype=arm if [ "$_ostype" = "linux-android" ]; then _ostype=linux-androideabi else _ostype="${_ostype}eabihf" fi ;; armv7l | armv8l) _cputype=armv7 if [ "$_ostype" = "linux-android" ]; then _ostype=linux-androideabi else _ostype="${_ostype}eabihf" fi ;; aarch64 | arm64) _cputype=aarch64 ;; x86_64 | x86-64 | x64 | amd64) _cputype=x86_64 ;; mips) _cputype=$(get_endianness mips '' el) ;; mips64) if [ "$_bitness" -eq 64 ]; then # only n64 ABI is supported for now _ostype="${_ostype}abi64" _cputype=$(get_endianness mips64 '' el) fi ;; ppc) _cputype=powerpc ;; ppc64) _cputype=powerpc64 ;; ppc64le) _cputype=powerpc64le ;; s390x) _cputype=s390x ;; riscv64) _cputype=riscv64gc ;; loongarch64) _cputype=loongarch64 ensure_loongarch_uapi ;; *) err "unknown CPU type: $_cputype" esac # Detect 64-bit linux with 32-bit userland if [ "${_ostype}" = unknown-linux-gnu ] && [ "${_bitness}" -eq 32 ]; then case $_cputype in x86_64) # 32-bit executable for amd64 = x32 if is_host_amd64_elf; then { echo "This host is running an x32 userland; as it stands, x32 support is poor. Please reach out to support for help." 1>&2 exit 1 }; else _cputype=i686 fi ;; mips64) _cputype=$(get_endianness mips '' el) ;; powerpc64) _cputype=powerpc ;; aarch64) _cputype=armv7 if [ "$_ostype" = "linux-android" ]; then _ostype=linux-androideabi else _ostype="${_ostype}eabihf" fi ;; riscv64gc) err "riscv64 with 32-bit userland unsupported" ;; esac fi if [ "$_ostype" = "unknown-linux-gnueabihf" ] && [ "$_cputype" = armv7 ]; then if ensure grep '^Features' /proc/cpuinfo | grep -E -q -v 'neon|simd'; then # At least one processor does not have NEON (which is asimd on armv8+). _cputype=arm fi fi _arch="${_cputype}-${_ostype}" RETVAL="$_arch" } # Check if curl supports the --retry flag, then pass it to the curl invocation. check_curl_for_retry_support() { local _retry_supported="" # "unspecified" is for arch, allows for possibility old OS using macports, homebrew, etc. if check_help_for "notspecified" "curl" "--retry"; then _retry_supported="--retry 3" if check_help_for "notspecified" "curl" "--continue-at"; then # "-C -" tells curl to automatically find where to resume the download when retrying. _retry_supported="--retry 3 -C -" fi fi RETVAL="$_retry_supported" } # Return cipher suite string specified by user, otherwise return strong TLS 1.2-1.3 cipher suites # if support by local tools is detected. Detection currently supports these curl backends: # GnuTLS and OpenSSL (possibly also LibreSSL and BoringSSL). Return value can be empty. get_ciphersuites_for_curl() { local _openssl_syntax="no" local _gnutls_syntax="no" local _backend_supported="yes" if curl -V | grep -q ' OpenSSL/'; then _openssl_syntax="yes" elif curl -V | grep -iq ' LibreSSL/'; then _openssl_syntax="yes" elif curl -V | grep -iq ' BoringSSL/'; then _openssl_syntax="yes" elif curl -V | grep -iq ' GnuTLS/'; then _gnutls_syntax="yes" else _backend_supported="no" fi local _args_supported="no" if [ "$_backend_supported" = "yes" ]; then # "unspecified" is for arch, allows for possibility old OS using macports, homebrew, etc. if check_help_for "notspecified" "curl" "--tlsv1.2" "--ciphers" "--proto"; then _args_supported="yes" fi fi local _cs="" if [ "$_args_supported" = "yes" ]; then if [ "$_openssl_syntax" = "yes" ]; then _cs=$(get_strong_ciphersuites_for "openssl") elif [ "$_gnutls_syntax" = "yes" ]; then _cs=$(get_strong_ciphersuites_for "gnutls") fi fi RETVAL="$_cs" } check_help_for() { local _arch local _cmd local _arg _arch="$1" shift _cmd="$1" shift local _category if "$_cmd" --help | grep -q 'For all options use the manual or "--help all".'; then _category="all" else _category="" fi case "$_arch" in *darwin*) if check_cmd sw_vers; then case $(sw_vers -productVersion) in 10.*) # If we're running on macOS, older than 10.13, then we always # fail to find these options to force fallback if [ "$(sw_vers -productVersion | cut -d. -f2)" -lt 13 ]; then # Older than 10.13 echo "Warning: Detected macOS platform older than 10.13" return 1 fi ;; 11.*) # We assume Big Sur will be OK for now ;; *) # Unknown product version, warn and continue echo "Warning: Detected unknown macOS major version: $(sw_vers -productVersion)" echo "Warning TLS capabilities detection may fail" ;; esac fi ;; esac for _arg in "$@"; do if ! "$_cmd" --help "$_category" | grep -q -- "$_arg"; then return 1 fi done true # not strictly needed } # Return strong TLS 1.2-1.3 cipher suites in OpenSSL or GnuTLS syntax. TLS 1.2 # excludes non-ECDHE and non-AEAD cipher suites. DHE is excluded due to bad # DH params often found on servers (see RFC 7919). Sequence matches or is # similar to Firefox 68 ESR with weak cipher suites disabled via about:config. # $1 must be openssl or gnutls. get_strong_ciphersuites_for() { if [ "$1" = "openssl" ]; then # OpenSSL is forgiving of unknown values, no problems with TLS 1.3 values on versions that don't support it yet. echo "TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_256_GCM_SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384" elif [ "$1" = "gnutls" ]; then # GnuTLS isn't forgiving of unknown values, so this may require a GnuTLS version that supports TLS 1.3 even if wget doesn't. # Begin with SECURE128 (and higher) then remove/add to build cipher suites. Produces same 9 cipher suites as OpenSSL but in slightly different order. echo "SECURE128:-VERS-SSL3.0:-VERS-TLS1.0:-VERS-TLS1.1:-VERS-DTLS-ALL:-CIPHER-ALL:-MAC-ALL:-KX-ALL:+AEAD:+ECDHE-ECDSA:+ECDHE-RSA:+AES-128-GCM:+CHACHA20-POLY1305:+AES-256-GCM" fi } need_cmd() { if ! check_cmd "$1"; then err "need '$1' (command not found)" fi } check_cmd() { command -v "$1" > /dev/null 2>&1 } assert_nz() { if [ -z "$1" ]; then err "assert_nz $2"; fi } err() { say "$1" >&2 exit 1 } # Run a command that should never fail. If the command fails execution # will immediately terminate with an error showing the failing # command. ensure() { if ! "$@"; then err "command failed: $*"; fi } say() { printf 'motor: %s\n' "$1" } # This is just for indicating that commands' results are being # intentionally ignored. Usually, because it's being executed # as part of error handling. ignore() { "$@" } _ansi_escapes_are_valid=false if [ -t 2 ]; then if [ "${TERM+set}" = 'set' ]; then case "$TERM" in xterm*|rxvt*|urxvt*|linux*|vt*) _ansi_escapes_are_valid=true ;; esac fi fi print_info() { if $_ansi_escapes_are_valid; then green="\033[32m" bold="\033[1m" reset="\033[0m" printf "${green}${bold}info:${reset} %s\n" "$1" 1>&2 else printf '%s\n' "info: $1" 1>&2 fi } main || exit 1