~rodsmith/refind/master

#!/bin/bash

#

# Mac OS X script to locate and mount an EFI System Partition (ESP)

#

# Usage:

#

# ./mountesp

#

# This program is copyright (c) 2015 by Roderick W. Smith

#

# This program is licensed under the terms of the GNU GPL, version 3,

# or (at your option) any later version.

# You should have received a copy of the GNU General Public License

# along with this program. If not, see <http://www.gnu.org/licenses/>.

#

# Revision history:

#

# 0.13.2  -- Fixed bug that caused failure with macOS 11.0 ("Big Sur")

# 0.9.3   -- Initial release (with rEFInd 0.9.3)

# Mount the ESP at /Volumes/ESP or determine its current mount

# point.

MountOSXESP() {

    # Identify the ESP. Note: This returns the FIRST ESP found;

    # if the system has multiple disks, this could be wrong!

    Temp=$(mount | sed -n -E "/^(\/dev\/disk.*) on \/ \(.*$/s//\1/p")

    if [ "$Temp" ]; then

        Temp=$(diskutil list | grep " EFI " | grep -o 'disk.*' | head -n 1)

        if [ -z "$Temp" ]; then

            echo "Warning: root device doesn't have an EFI partition"

        fi

    else

        echo "Warning: root device could not be found"

    fi

    if [ -z "$Temp" ]; then

        Temp=$(diskutil list | sed -n -E '/^ *[0-9]+:[ ]+EFI EFI[ ]+[0-9.]+ [A-Z]+[ ]+(disk[0-9]+s[0-9]+)$/ { s//\1/p

                q

            }' )

        if [ -z "$Temp" ]; then

            echo "Could not find an EFI partition. Aborting!"

            exit 1

        fi

    fi

    Esp=/dev/$Temp

    echo "The ESP has been identified as $Esp; attempting to mount it...."

    # If the ESP is mounted, use its current mount point....

    Temp=$(df -P | grep "$Esp ")

    MountPoint=$(echo "$Temp" | cut -f 6- -d ' ')

    if [[ "$MountPoint" == '' ]] ; then

        if [[ $UID != 0 ]] ; then

            echo "You must run this program as root or using sudo! Exiting!"

            exit 1

        fi

        MountPoint="/Volumes/ESP"

        # echo "MountPoint is $MountPoint"

        mkdir /Volumes/ESP &> /dev/null

        # Some systems have HFS+ "ESPs." They shouldn't, but they do. If this is

        # detected, mount it as such and set appropriate options.

        if  ! mount -t msdos "$Esp" $MountPoint ; then

            if ! mount -t hfs "$Esp" $MountPoint ; then

                printf "Unable to mount ESP!\n\n"

                exit 1

            fi

        fi

    fi

    echo "The ESP is mounted at $MountPoint"

} # MountOSXESP()

#

# Main part of script....

#

case "$OSTYPE" in

    darwin*)

            MountOSXESP

            ;;

    *)

            echo "This script is meant to be run under OS X *ONLY*! Exiting!"

            exit

            ;;

esac