Openwrt /etc/rc.button/reset 保存配置安全脚本

写一个/etc/rc.button/reset脚本来对安全，状态还有配置改变的反馈做相应的处理

远程操作按下reset按键，并存储配置，脚本文件：

#!/bin/shPATH="$PATH:/usr/local/sbin/:/usr/local/bin/"# Only run on button release.[[ "${ACTION}" = "released" ]] || exit 0# logger "$BUTTON pressed for $SEEN seconds"# env >> /tmp/reset-buttonif [[ "$SEEN" -le 1 ]] ; then    MESSAGE="RESET BUTTON: Retain current overlay, restore safebackup, and reboot"    echo "$MESSAGE" > /dev/console    logger "$MESSAGE"    safebackup restore && reboot &elif [[ "$SEEN" -ge 3 -a "$SEEN" -le 5 ]] ; then    MESSAGE="RESET BUTTON: Wipe overlay, restore safebackup, and reboot"    echo "$MESSAGE" > /dev/console    logger "$MESSAGE"    safebackup fullrestoreelif [[ "$SEEN" -ge 9 -a "$SEEN" -le 12 ]] ; then    MESSAGE="RESET BUTTON: Wipe overlay (factory reset) and reboot"    echo "$MESSAGE" > /dev/console    logger "$MESSAGE"    jffs2reset -y && reboot &else    MESSAGE="RESET BUTTON: Error. Pressed for $SEEN seconds. Do nothing."    echo "$MESSAGE" > /dev/console    logger "$MESSAGE"fi

另一个安全备份脚本：

#!/bin/sh# This script was written to run under the busybox ash shell.## Save and restore a safe configuration backup state for the host.export BAKDIR="/safebackups"export SAVEFILE="/safebackups/safebackup-$(hostname)-$(date +%Y%m%d%H%M%S)-$$.tar.gz"export RESTOREFILE=$(find /safebackups/ -maxdepth 1 -mindepth 1 -type f -name 'safebackup-*.tar.gz' | head -n 1 2> /dev/null)export SYSUPGRADE_CONF_TAR="/tmp/sysupgrade.tgz"PIDFILE="/tmp/$(basename $0.pid)"MYNAME=$(basename $0)#--echoerr() {    # Print errors to stderr.    echo "$@" 1>&2;}f_validate_restore() {    # Validate before a restoration.    # If there is no restore file, there is nothing we can do.    if ! [[ -f "$RESTOREFILE" ]] ; then        echoerr ""        echoerr "ERROR: No restore file could be found."        echoerr ""        exit 1    fi}f_save() {    # Save a backup.    echo ""    # Make sure the BAKDIR exists. If not, create it.    if ! [[ -d "$BAKDIR" ]] ; then        echo "$BAKDIR does not exist, so creating it."        mkdir "$BAKDIR"        chmod o-rwx "$BAKDIR"    fi    # Remove old backups prior to the new save. We only keep one backup at a time.    echo -n "Removing old backups..."    rm -rf /safebackups/safebackup-*.tar.gz    echo " Done"    # Save the new backup.    sysupgrade -b "$SAVEFILE"    echo "sysupgrade backup saved to $SAVEFILE"    echo ""}f_restore() {    # Restore the backup.    f_validate_restore    echo ""    echo "Restoring sysupgrade backup from file: $RESTOREFILE"    sysupgrade -r "$RESTOREFILE"    echo " Done"    echo ""}f_fullrestore() {    # Wipe the overlay flash, and restore from backup.    # This is a complicated and dangerous process. This is mostly based on what the sysupgrade script does.    # FIXME: ext-root problems? Reference notes.    f_validate_restore    echo ""    echo "Wiping overlay and restoring sysupgrade backup from file: $RESTOREFILE"    echoerr "WARNING: Network access will be lost during this process and the host will be rebooted."    echo ""    # Copy the safe backup to /tmp    cp "$RESTOREFILE" "$SYSUPGRADE_CONF_TAR" || { echoerr "ERROR: Unable cp restore file to /tmp" ; exit 1 ; }    #    # Source required functions.    source /lib/functions.sh    for EACH in /lib/upgrade/*.sh ; do source "$EACH" ; done    #    # run_hooks will disable the process watchdog and do other important tasks.    run_hooks "" $sysupgrade_pre_upgrade    #    # No idea what this does, and may not be needed at all.    ubus call system upgrade    #    # Kill off all non-critical processes.    kill_remaining TERM ; sleep 3 ; kill_remaining KILL    #    # This is the important part. This runs the ramfs, pivots root, erases the overlay, and restores the config backup.    # WARNING: Remember that when we do run_ramfs, we lose access to the old filesystem, possibly functions, envrionment, etc.    run_ramfs 'mtd -e rootfs_data jffs2write $SYSUPGRADE_CONF_TAR rootfs_data ; reboot -f'    #    # Nothing from here on our matters. We've already rebooted.    # SYSUPGRADE_CONF_TAR is restored on reboot by /lib/preinit/80_mount_root and erased by /etc/init.d/done    #    echo " Done"    echo ""}#--case "$1" in    save )        f_save    ;;    restore )        f_restore    ;;    fullrestore )        f_fullrestore    ;;    *)        echo ""        echo "Usage: $MYNAME save|restore|fullrestore"        echo "  WARNING: fullrestore implies a overlay wipe and reboot"        echo ""        exit 1    ;;esac

在做reset复位之前，先要进行安全备份，没有备份，就不会进行复位：
button按下0-1秒，保存配置并重启，overlay没有擦除
button按下3-5秒，overly被擦除，存储配置，重启
button按下9-12秒，进行出厂复位，overlay配擦除，没有配置存储

warning: 该脚本不是Openwrt通用脚本，仅作参考，需要根据不用的路由器做出对应修改