93 lines
3.1 KiB
Bash
93 lines
3.1 KiB
Bash
#!/bin/sh
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#===============================================================================
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#
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# mount_bootparts.sh
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#
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# Copyright (C) 2014-2019 by Digi International Inc.
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# All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 2 as published by
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# the Free Software Foundation.
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#
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# !Description: Attempt to mount boot partitions read-only (called from udev)
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#
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#===============================================================================
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BASE_INIT="$(readlink -f "@base_sbindir@/init")"
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INIT_SYSTEMD="@systemd_unitdir@/systemd"
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if [ "${SUBSYSTEM}" = "block" ]; then
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PARTNAME="${ID_PART_ENTRY_NAME}"
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elif [ "${SUBSYSTEM}" = "mtd" ]; then
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MTDN="$(echo ${DEVNAME} | cut -f 3 -d /)"
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PARTNAME="$(grep ${MTDN} /proc/mtd | sed -ne 's,.*"\(.*\)",\1,g;T;p')"
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fi
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MOUNT_PARAMS="-o silent"
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# Mount 'linux' partition as read-only
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if [ "${PARTNAME}" = "linux" ]; then
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MOUNT_PARAMS="${MOUNT_PARAMS} -o ro"
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fi
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if [ "x$BASE_INIT" = "x$INIT_SYSTEMD" ];then
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# systemd as init uses systemd-mount to mount block devices
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MOUNT="/usr/bin/systemd-mount"
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MOUNT_PARAMS="${MOUNT_PARAMS} --no-block"
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if [ -x "$MOUNT" ];
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then
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logger "Using systemd-mount to finish mount"
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else
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logger "Linux init is using systemd, so please install systemd-mount to finish mount"
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exit 1
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fi
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else
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MOUNT="/bin/mount"
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if [ "$(readlink ${MOUNT})" != "/bin/mount.util-linux" ]; then
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# Busybox mount. Clear default params
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MOUNT_PARAMS=""
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# Mount 'linux' partition as read-only
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if [ "${PARTNAME}" = "linux" ]; then
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MOUNT_PARAMS="${MOUNT_PARAMS} -r"
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fi
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fi
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fi
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# Create mount point if needed
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MOUNTPOINT="/mnt/${PARTNAME}"
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[ -d "${MOUNTPOINT}" ] || mkdir -p ${MOUNTPOINT}
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if [ "${SUBSYSTEM}" = "block" ]; then
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if ! ${MOUNT} -t auto ${MOUNT_PARAMS} ${DEVNAME} ${MOUNTPOINT}; then
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logger -t udev "ERROR: Could not mount ${DEVNAME} under ${MOUNTPOINT}"
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rmdir --ignore-fail-on-non-empty ${MOUNTPOINT}
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fi
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elif [ "${SUBSYSTEM}" = "mtd" ]; then
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# Before attaching, find out if partition already attached
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MTD_NUM="$(echo ${MTDN} | sed -ne 's,.*mtd\([0-9]\+\),\1,g;T;p')"
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for ubidev in /sys/devices/virtual/ubi/*; do
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echo "${ubidev}" | grep -qs '/sys/devices/virtual/ubi/\*' && continue
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mtd_att="$(cat ${ubidev}/mtd_num)"
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if [ "${mtd_att}" = "${MTD_NUM}" ]; then
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dev_number="$(echo ${ubidev} | sed -ne 's,.*ubi\([0-9]\+\),\1,g;T;p')"
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fi
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done
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# If not already attached, attach and get UBI device number
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if [ -z "${dev_number}" ]; then
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dev_number="$(ubiattach -p ${DEVNAME} 2>/dev/null | sed -ne 's,.*device number \([0-9]\).*,\1,g;T;p' 2>/dev/null)"
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fi
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# Check if volume exists.
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if ubinfo /dev/ubi${dev_number} -N ${PARTNAME} >/dev/null 2>&1; then
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# Mount the volume.
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if ! mount -t ubifs ubi${dev_number}:${PARTNAME} ${MOUNT_PARAMS} ${MOUNTPOINT}; then
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logger -t udev "ERROR: Could not mount '${PARTNAME}' partition"
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rmdir --ignore-fail-on-non-empty ${MOUNTPOINT}
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fi
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else
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logger -t udev "ERROR: Could not mount '${PARTNAME}' partition, volume not found"
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rmdir --ignore-fail-on-non-empty ${MOUNTPOINT}
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fi
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fi
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