mirror of
https://github.com/acidanthera/OpenCorePkg.git
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97691620d8
- Compatible with earlier macOS (Snow Leopard+ tested) - Automatically installs as launch daemon (Yosemite+) or logout hook
543 lines
17 KiB
Bash
Executable File
543 lines
17 KiB
Bash
Executable File
#!/bin/bash
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#
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# Copyright © 2022 Mike Beaton. All rights reserved.
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# SPDX-License-Identifier: BSD-3-Clause
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#
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# Examine log at /var/log/org.acidanthera.nvramhook.launchd/launchd.log.
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#
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# Script can run immediately or be installed as daemon or logout hook. Installs as
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# launch daemon on Yosemite and above, which is the only supported approach that on
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# shutdown reads NVRAM after macOS installer vars are set, in more recent macOS
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# installers (e.g. Monterey).
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#
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# Non-installed script can be run directly as 'daemon' or 'logout' hook by
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# specifying one of those options on the command line. For 'logout' this saves NVRAM
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# immediately, for 'daemon' this waits to be terminated e.g. CTRL+C before saving.
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#
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# TO DO: rc.shutdown.d approach discussed in
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# https://github.com/acidanthera/bugtracker/issues/2106
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# might be a viable alternative (needs testing re timing of picking up NVRAM changes).
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#
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# Credits:
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# - Rodion Shingarev (with additional contributions by vit9696 and PMheart) for
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# original LogoutHook.command
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# - Rodion Shingarev for nvramdump command
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# - Mike Beaton for this script
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#
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usage() {
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echo "Usage: ${SELFNAME} [install|uninstall|status] [logout|daemon]"
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echo " - [install|uninstall] without type uses recommended type for macOS version"
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echo " - 'status' shows status of daemon and logout hook"
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echo " - 'status daemon' gives additional detail on daemon"
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echo ""
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}
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doLog() {
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# 'sudo tee' to write to log file as root (could also 'sh -c') for installation steps;
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# will be root anyway when running installed as daemon or logout hook
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if [ ! "${LOG_PREFIX}" = "" ] ; then
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sudo tee -a "${LOGFILE}" > /dev/null << EOF
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$(date +"${DATEFORMAT}") (${LOG_PREFIX}) ${1}
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EOF
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else
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sudo tee -a "${LOGFILE}" > /dev/null << EOF
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${1}
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EOF
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fi
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if [ ! "$INSTALLED" = "1" ] ; then
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echo "${1}"
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fi
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}
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abort() {
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doLog "Fatal error: ${1}"
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exit 1
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}
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# abort without logging or requiring sudo
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earlyAbort() {
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echo "Fatal error: ${1}" > /dev/stderr
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exit 1
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}
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getDarwinMajorVersion() {
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darwin_ver=$(uname -r)
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# Cannot add -r in earlier macOS
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# shellcheck disable=SC2162
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IFS="." read -a darwin_ver_array <<< "$darwin_ver"
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echo "${darwin_ver_array[0]}"
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}
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installLog() {
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FAIL="Failed to install log!"
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if [ ! -d "${LOGDIR}" ] ; then
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sudo mkdir "${LOGDIR}" || abort "${FAIL}"
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fi
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if [ ! -f "${LOGFILE}" ] ; then
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sudo touch "${LOGFILE}" || abort "${FAIL}"
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fi
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}
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install() {
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FAIL="Failed to install!"
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if [ ! -d "${PRIVILEGED_HELPER_TOOLS}" ] ; then
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sudo mkdir "${PRIVILEGED_HELPER_TOOLS}" || abort "${FAIL}"
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fi
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# Copy executable files into place.
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sudo cp "${SELFNAME}" "${HELPER}" || abort "${FAIL}"
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sudo cp nvramdump "${NVRAMDUMP}" || abort "${FAIL}"
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# Install logout hook.
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if [ "$LOGOUT" = "1" ] ; then
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sudo defaults write com.apple.loginwindow LogoutHook "${HELPER}" || abort "${FAIL}"
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fi
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# Make customised Launchd.command.plist for daemon.
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if [ "$DAEMON" = "1" ] ; then
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sed "s/\$LABEL/${ORG}.daemon/g;s/\$HELPER/$(sed 's/\//\\\//g' <<< "$HELPER")/g;s/\$PARAM/daemon/g;s/\$LOGFILE/$(sed 's/\//\\\//g' <<< "$LOGFILE")/g" "Launchd.command.plist" > "/tmp/Launchd.command.plist" || abort "${FAIL}"
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sudo cp "/tmp/Launchd.command.plist" "${DAEMON_PLIST}" || abort "${FAIL}"
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rm -f /tmp/Launchd.command.plist
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fi
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# Launch already installed daemon.
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if [ "$DAEMON" = "1" ] ; then
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sudo launchctl load "${DAEMON_PLIST}" || abort "${FAIL}"
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fi
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echo "Installed."
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}
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# On older macOS, previous version of this script would install and uninstall
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# harmless (i.e. takes no actions) agent script if requested, but fail to report
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# it as installed, and fail to start it immediately, so clean up.
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#
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# Working agent (probably never much use) requires:
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# - chmod for logfile access
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# - non-sudo log writer (agent is not sudo and cannot gain it)
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# - customised agent.plist
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# - load with launchctl load (earlier macOS) or sudo launchctl bootstrap
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# - unload with launchctl unload (earlier macOS) or sudo launchctl bootout
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#
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uninstallAgent() {
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if [ -f "${AGENT_PLIST}" ] ; then
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sudo rm -f "${AGENT_PLIST}"
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echo "Uninstalled agent."
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fi
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}
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uninstall() {
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UNINSTALLED=1
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if [ "$DAEMON" = "1" ] ; then
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if [ "$DAEMON_PID" = "" ] ; then
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UNINSTALLED=2
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echo "Daemon was not installed!" > /dev/stderr
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else
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# Place special value in saved device node so that nvram.plist is not updated at uninstall
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sudo /usr/sbin/nvram "${BOOT_NODE}=null" || abort "Failed to save null boot device!"
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sudo launchctl unload "${DAEMON_PLIST}" || UNINSTALLED=0
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DAEMON_PID=
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fi
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sudo rm -f "${DAEMON_PLIST}"
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elif [ "$LOGOUT" = "1" ] ; then
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if [ "$LOGOUT_HOOK" = "" ] ; then
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UNINSTALLED=2
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echo "Logout hook was not installed!" > /dev/stderr
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else
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sudo defaults delete com.apple.loginwindow LogoutHook || UNINSTALLED=0
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LOGOUT_HOOK=
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fi
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fi
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if [ "$DAEMON_PID" = "" ] &&
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[ "$LOGOUT_HOOK" = "" ] ; then
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sudo rm -f "${HELPER}"
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sudo rm -f "${NVRAMDUMP}"
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fi
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if [ "$UNINSTALLED" = "0" ] ; then
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echo "Could not uninstall!"
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elif [ "$UNINSTALLED" = "1" ] ; then
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echo "Uninstalled."
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fi
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}
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status() {
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if [ ! "$DAEMON" = "1" ] ; then
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echo "Daemon pid = ${DAEMON_PID}"
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echo "LogoutHook = ${LOGOUT_HOOK}"
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else
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# Detailed info on daemon.
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if [ "$DAEMON" = "1" ] ; then
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sudo launchctl print "system/${ORG}.daemon"
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fi
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fi
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}
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# Save some diskutil info in emulated NVRAM for use at daemon shutdown:
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# - While we can access diskutil normally at agent startup and at logout hook;
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# - We cannot use diskutil at daemon shutdown, because:
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# "Unable to run because unable to use the DiskManagement framework.
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# Common reasons include, but are not limited to, the DiskArbitration
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# framework being unavailable due to being booted in single-user mode."
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# - At daemon startup, diskutil works but the device may not be ready
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# immediately, but macOS restarts us quickly (~5s) and then we can run.
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# Note that saving any info for use at process shutdown if not running as
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# daemon (sudo) would have to go into e.g. a file not nvram.
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saveMount() {
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UUID="$(/usr/sbin/nvram "${BOOT_PATH}" | sed 's/.*GPT,\([^,]*\),.*/\1/')"
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if [ "$(printf '%s' "${UUID}" | /usr/bin/wc -c)" -eq 36 ] && [ -z "$(echo "${UUID}" | sed 's/[-0-9A-F]//g')" ] ; then
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node="$(/usr/sbin/diskutil info "${UUID}" | sed -n 's/.*Device Node: *//p')"
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# This may randomly fail initially, if so the script gets restarted by
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# launchd and eventually succeeds.
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if [ "${node}" = "" ] ; then
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abort "Cannot access device node!"
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fi
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doLog "Found boot device at ${node}"
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if [ "${1}" = "1" ] ; then
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# On earlier macOS (at least Mojave in VMWare) there is an intermittent
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# problem where msdos/FAT kext is occasionally not available when we try
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# to mount the drive on daemon exit; mounting and unmounting on daemon
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# start here fixes this.
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# Doing this introduces a different problem, since this early mount sometimes
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# fails initially, however (as with 'diskutil info' above) in that case the
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# script gets restarted by launchd after ~5s, and eventually either succeeds or
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# finds the drive already mounted (when applicable, i.e. not marked as ESP).
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mount_path=$(mount | sed -n "s:${node} on \(.*\) (.*$:\1:p")
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if [ ! "${mount_path}" = "" ] ; then
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doLog "Early mount not needed, already mounted at ${mount_path}"
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else
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sudo /usr/sbin/diskutil mount "${node}" 1>/dev/null || abort "Early mount failed!"
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sudo /usr/sbin/diskutil unmount "${node}" 1>/dev/null || abort "Early unmount failed!"
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doLog "Early mount/unmount succeeded"
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fi
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# Use hopefully emulated NVRAM as temporary storage for the boot
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# device node discovered with diskutil.
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# If we are in emulated NVRAM, should not appear at next boot as
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# nvramdump does not write values from OC GUID back to nvram.plist.
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sudo /usr/sbin/nvram "${BOOT_NODE}=${node}" || abort "Failed to store boot device!"
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fi
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else
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abort "Missing or invalid ${BOOT_PATH} value!"
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fi
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}
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saveNvram() {
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if [ "${1}" = "1" ] ; then
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# . matches tab, note that \t for tab cannot be used in earlier macOS (e.g Mojave)
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node=$(/usr/sbin/nvram "$BOOT_NODE" | sed -n "s/${BOOT_NODE}.//p")
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if [ ! "$INSTALLED" = "1" ] ; then
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# don't trash saved value if daemon is live
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launchctl print "system/${ORG}.daemon" 2>/dev/null 1>/dev/null || sudo /usr/sbin/nvram -d "$BOOT_NODE"
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else
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sudo /usr/sbin/nvram -d "$BOOT_NODE"
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fi
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fi
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if [ "${node}" = "" ] ; then
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abort "Cannot access saved device node!"
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elif [ "${node}" = "null" ] ; then
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sudo /usr/sbin/nvram "${BOOT_NODE}=" || abort "Failed to remove boot node variable!"
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doLog "Uninstalling…"
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return
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fi
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mount_path=$(mount | sed -n "s:${node} on \(.*\) (.*$:\1:p")
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if [ ! "${mount_path}" = "" ] ; then
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doLog "Already mounted at ${mount_path}"
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else
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# use reasonably assumed unique path
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mount_path="/Volumes/${UNIQUE_DIR}"
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sudo mkdir -p "${mount_path}" || abort "Failed to make directory!"
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sudo mount -t msdos "${node}" "${mount_path}" || abort "Failed to mount!"
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doLog "Mounted at ${mount_path}"
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MOUNTED=1
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fi
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if [ "${NVRAM_DIR}" = "" ] ; then
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nvram_dir="${mount_path}"
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else
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nvram_dir="${mount_path}/${NVRAM_DIR}"
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if [ ! -d "${nvram_dir}" ] ; then
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sudo mkdir "${nvram_dir}" || abort "Failed to make directory ${nvram_dir}"
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fi
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fi
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rm -f /tmp/nvram.plist
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${USE_NVRAMDUMP} || abort "failed to save nvram.plist!"
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if [ -f "${nvram_dir}/nvram.plist" ] ; then
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cp "${nvram_dir}/nvram.plist" "${nvram_dir}/nvram.fallback" || abort "Failed to create nvram.fallback!"
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doLog "Copied nvram.fallback"
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fi
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cp /tmp/nvram.plist "${nvram_dir}/nvram.plist" || abort "Failed to copy nvram.plist!"
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doLog "Saved nvram.plist"
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rm -f /tmp/nvram.plist
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if [ -f "${nvram_dir}/nvram.used" ] ; then
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rm "${nvram_dir}/nvram.used" || abort "Failed to delete nvram.used!"
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doLog "Deleted nvram.used"
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fi
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# We would like to always unmount here if we made the mount point, but at exit of
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# installed daemon umount fails with "Resource busy" and diskutil is not available.
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# This should not cause any problem except that the boot drive will be left mounted
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# at the unique path if the daemon process gets killed (the process would then be
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# restarted by macOS and NVRAM should still be saved at exit).
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if [ "$MOUNTED" = "1" ] ; then
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# For logout hook or if running in immediate mode, we can clean up.
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if [ "$LOGOUT" = "1" ] ||
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[ ! "$INSTALLED" = "1" ] ; then
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# Depending on how installed and macOS version, either unmount may be needed.
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# (On Lion failure of 'diskutil unmount' may be to say volume is already unmounted when it is not.)
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MOUNTED=0
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sudo diskutil unmount "${node}" 1>/dev/null 2>/dev/null || MOUNTED=1
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if [ "$MOUNTED" = "0" ] ; then
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doLog "Unmounted with diskutil"
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else
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sudo umount "${node}" || abort "Failed to unmount!"
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sudo rmdir "${mount_path}" || abort "Failed to remove directory!"
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doLog "Unmounted with umount"
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fi
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fi
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fi
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}
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onComplete() {
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doLog "Trap ${1}"
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if [ "$DAEMON" = "1" ] ; then
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saveNvram 1 "daemon"
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fi
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doLog "Ended."
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# Required if running directly (launchd kills any orphaned child processes by default).
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# ShellCheck ref: https://github.com/koalaman/shellcheck/issues/648#issuecomment-208306771
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# shellcheck disable=SC2046
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kill $(jobs -p)
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exit 0
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}
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if [ ! -x /usr/bin/dirname ] ||
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[ ! -x /usr/bin/basename ] ||
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[ ! -x /usr/bin/wc ] ||
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[ ! -x /usr/sbin/diskutil ] ||
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[ ! -x /usr/sbin/nvram ] ; then
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earlyAbort "Unix environment is broken!"
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fi
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NVRAM_DIR="NVRAM"
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OCNVRAMGUID="4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102"
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# Darwin version from which we can wake a sleeping daemon, corresponds to Yosemite and upwards.
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LAUNCHD_DARWIN=14
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# OC generated NVRAM var
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BOOT_PATH="${OCNVRAMGUID}:boot-path"
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# temp storage var for this script
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BOOT_NODE="${OCNVRAMGUID}:boot-node"
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# re-use as unique directory name for mount point when needed
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UNIQUE_DIR="${BOOT_NODE}"
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PRIVILEGED_HELPER_TOOLS="/Library/PrivilegedHelperTools"
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ORG="org.acidanthera.nvramhook"
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NVRAMDUMP="${PRIVILEGED_HELPER_TOOLS}/${ORG}.nvramdump.helper"
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DAEMON_PLIST="/Library/LaunchDaemons/${ORG}.daemon.plist"
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AGENT_PLIST="/Library/LaunchAgents/${ORG}.agent.plist"
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HELPER="${PRIVILEGED_HELPER_TOOLS}/${ORG}.helper"
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LOGDIR="/var/log/${ORG}.launchd"
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# launchd .plist configuration is set in install() to redirect stdout and stderr (useful) to LOGFILE anyway.
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LOGFILE="${LOGDIR}/launchd.log"
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SELFDIR="$(/usr/bin/dirname "${0}")"
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SELFNAME="$(/usr/bin/basename "${0}")"
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# -R sets this, on newer macOS only; date format is required because root from user sudo and root
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# when running daemons or logout hooks are picking up different date formats.
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DATEFORMAT="%a, %d %b %Y %T %z"
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# Detect whether we're running renamed, i.e. installed copy, or else presumably from distribution directory.
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if [ ! "$SELFNAME" = "Launchd.command" ] ; then
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USE_NVRAMDUMP="${NVRAMDUMP}"
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INSTALLED=1
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else
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cd "${SELFDIR}" || earlyAbort "Failed to enter working directory!"
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if [ ! -x ./nvramdump ] ; then
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earlyAbort "Compiled nvramdump is not found!"
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fi
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USE_NVRAMDUMP="./nvramdump"
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fi
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for arg;
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do
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case $arg in
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install )
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INSTALL=1
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;;
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uninstall )
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UNINSTALL=1
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;;
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daemon )
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DAEMON=1
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;;
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logout )
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LOGOUT=1
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;;
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status )
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STATUS=1
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;;
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# Usage for invalid param.
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# Note script called as logout hook gets passed name of user logging out as a param.
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* )
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if [ ! "$INSTALLED" = "1" ] ; then
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usage
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exit 0
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fi
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;;
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esac
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done
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# If not told what to do, work it out.
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# When running as daemon, 'daemon' is specified as a param.
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if [ ! "$DAEMON" = "1" ] &&
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[ ! "$LOGOUT" = "1" ] ; then
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if [ "$INSTALL" = "1" ] ||
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[ "$UNINSTALL" = "1" ] ; then
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# When not specified, choose to (un)install daemon or logout hook depending on macOS version.
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if [ "$(getDarwinMajorVersion)" -ge ${LAUNCHD_DARWIN} ] ; then
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echo "Darwin $(uname -r) >= ${LAUNCHD_DARWIN}, using daemon"
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DAEMON=1
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else
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echo "Darwin $(uname -r) < ${LAUNCHD_DARWIN}, using logout hook."
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LOGOUT=1
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fi
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else
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if [ "$INSTALLED" = "1" ] ; then
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# If installed with no type as a param, we are installed as logout hook.
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LOGOUT=1
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elif [ ! "$STATUS" = "1" ] ; then
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# Usage for no params.
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usage
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exit 0
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fi
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fi
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fi
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if [ "$DAEMON" = "1" ] ; then
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LOG_PREFIX="Daemon"
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elif [ "$LOGOUT" = "1" ] ; then
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LOG_PREFIX="Logout"
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fi
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if [ ! "$INSTALLED" = "1" ] ; then
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LOG_PREFIX="${LOG_PREFIX}-Immediate"
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fi
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if [ "$INSTALL" = "1" ] ||
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[ "$UNINSTALL" = "1" ] ||
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[ "$STATUS" = "1" ] ; then
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# Get root immediately
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sudo echo -n || earlyAbort "Could not obtain sudo!"
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if [ "$UNINSTALL" = "1" ] ||
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[ "$STATUS" = "1" ] ; then
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# For agent/daemon pid prefer 'launchctl list' as it works on older macOS where 'launchtl print' does not.
|
|
DAEMON_PID="$(sudo launchctl list | sed -n "s/\([0-9\-]*\).*${ORG}.daemon/\1/p" | sed 's/-/Failed to start!/')"
|
|
LOGOUT_HOOK="$(sudo defaults read com.apple.loginwindow LogoutHook 2>/dev/null)"
|
|
fi
|
|
fi
|
|
|
|
if [ "$INSTALL" = "1" ] ||
|
|
[ "$UNINSTALL" = "1" ] ; then
|
|
uninstallAgent
|
|
fi
|
|
|
|
if [ "$INSTALL" = "1" ] ; then
|
|
installLog
|
|
|
|
# Save NVRAM immediately, this will become the fallback NVRAM after the first shutdown.
|
|
# Do not install if this fails, since this indicates that required boot path from OC is
|
|
# not available, or other fatal error.
|
|
if [ "$DAEMON" = "1" ] ||
|
|
[ "$LOGOUT" = "1" ] ; then
|
|
doLog "Installing…"
|
|
doLog "Saving initial nvram.plist…"
|
|
saveMount 0
|
|
if [ "$DAEMON" = "1" ] ; then
|
|
saveNvram 0 "daemon"
|
|
else
|
|
saveNvram 0 "logout"
|
|
fi
|
|
fi
|
|
|
|
install
|
|
|
|
exit 0
|
|
fi
|
|
|
|
if [ "$UNINSTALL" = "1" ] ; then
|
|
msg="$(uninstall)"
|
|
if [ ! "${msg}" = "" ] ; then
|
|
doLog "${msg}"
|
|
fi
|
|
exit 0
|
|
fi
|
|
|
|
if [ "$STATUS" = "1" ] ; then
|
|
status
|
|
exit 0
|
|
fi
|
|
|
|
if [ "${LOGOUT}" = "1" ] ; then
|
|
saveMount 0
|
|
saveNvram 0 "logout"
|
|
exit 0
|
|
fi
|
|
|
|
# Useful for trapping all signals to see what we get.
|
|
#for s in {1..31} ;do trap "onComplete $s" $s ;done
|
|
|
|
# Trap CTRL+C for testing for immediate mode, and trap normal or forced daemon
|
|
# or agent termination. Separate trap commands so we can log which was caught.
|
|
trap "onComplete SIGINT" SIGINT
|
|
trap "onComplete SIGTERM" SIGTERM
|
|
|
|
doLog "Starting…"
|
|
|
|
if [ "$DAEMON" = "1" ] ; then
|
|
saveMount 1
|
|
fi
|
|
|
|
while true
|
|
do
|
|
doLog "Running…"
|
|
|
|
# https://apple.stackexchange.com/a/126066/113758
|
|
# Only works from Yosemite upwards.
|
|
sleep $RANDOM & wait
|
|
done
|