nvramfile

#!/bin/sh
ver="nvramfile v0.6" # rs232 - 09/23
b="\033[0;40m"
w="\033[1;37m"
alias helpout='echo -e "┌───────────────────────────────────────────────────────────────────────────────┐
│                          ${w}FreshTomato $ver${b}                           │
└───────────────────────────────────────────────────────────────────────────────┘
┌─ Standard operation ──────────────────────────────────────────────────────────┐
│     ${w}nvramfile get|set|unset variable /path/file*${b}
│     ${w}nvramfile show /path/file*${b}
│
│ * path/file is optional. If left empty this default to \$(nvram get nvfile)
│
│ usage examples:
│     nvramfile get 'adblock_blacklist' /mnu/USB/config.nvram
│ or
│     nvram set nvfile=/mnu/USB/config.nvram
│     nvramfile get 'adblock_blacklist'
└───────────────────────────────────────────────────────────────────────────────┘
┌─ Migration ───────────────────────────────────────────────────────────────────┐
│     ${w}nvramfile copy|move <var regex> source destination ${b}
│     ${w}nvramfile remove <var regex> /path/file*${b}
│
│ • source & destination - can be \"n\" (nvram) or \"f\" (file)
│ • f only - gets the config file full path from \$(nvram get nvfile)
│ • f only - providing manually the full file path is also accepted
│ • remove - allows to unset variable in the file (only)
│ • variables ending \"_enable\" and \"_vmfile\" are excluded (always stay in nvram)
│ • <var regex> - to copy a single variable do append \"=\" to the nariable name
│ * path/file if optional, is left empty this is taken from \$(nvram get nvfile)
│
│ usage example:
│     nvramfile move ^adblock_ n /mnt/USB/config.nvram
│ or
│     nvram set nvfile=/mnu/USB/config.nvram
│     nvramfile move ^adblock_ n f
│
│     nvramfile remove ^adblock_
└───────────────────────────────────────────────────────────────────────────────┘
" && exit'

[ "$#" -eq 0 ] && helpout || {
[ $(nvram get nvfile | wc -c ) -gt 0 ] && nvfile="$(nvram get nvfile)"
nvfileset() {
    echo "${2}" | grep -q '=' && {
        vn=$(echo "${2}" | grep -Eo '.*=')
        grep -q ^$vn "${3}" && {
        sed -i "/^${vn}/c ${2}" "${3}"
        } || echo "${2}" >> "${3}"
    } || echo "Error the variable is not fully defined"
}
nvfileunset() {
    vn=$(echo ${2} | cut -d= -f1) ; vn="${vn}="
    grep -q ^$vn "${3}" && {
        sed -i "/^${vn}/d" "${3}"
    } || echo -e "Variable not found in ${3}"
}

if [ "${1}" == 'help' ]; then
    helpout
elif [ "${1}" == 'get' ]; then
    [ -z "${2}" ] && { echo -e \"parameter missing\"; exit; }
    [ ! -z "${3}" ] && nvfile="${3}"
    cat "${nvfile}" | grep -E "${2}"!\=$ | cut -d= -f2
    exit
elif [ "${1}" == 'set' ]; then
    [ -z "${2}" ] && { echo -e \"parameter missing\"; exit; }
    [ ! -z "${3}" ] && nvfile="${3}"
    nvfileset "${1}" "${2}" "$nvfile"
    exit
elif [ "${1}" == 'unset' ]; then
    [ -z "${2}" ] && { echo -e \"parameter missing\"; exit; }
    [ ! -z "${3}" ] && nvfile="${3}"
    nvfileunset "${1}" "${2}" "$nvfile"
    exit
elif [ "${1}" == 'show' ]; then
    [ ! -z "${2}" ] && nvfile="${2}"
    cat "${nvfile}"
elif [ "${1}" == 'copy' ]; then
    [ -z "${2}" -o -z "${3}" -o -z "${4}" ] && { echo -e \"parameter missing\"; exit; }
# Copy nvram to file
    [ "${3}" == 'n' -a ! -z "${4}" ] && {
        [ "${4}" != 'f' ] && nvfile="${4}"
        nvram show | grep -v '_enable=\|_vmfile=' | grep -E "${2}" | while read line; do
        nvfileset "${1}" "${line}" "$nvfile"
    done
    }
# Copy file to nvram
    [ ! -z "${3}" -a "${4}" == 'n' ] && {
        [ "${3}" != 'f' ] && nvfile="${3}"
        cat "$nvfile" | grep -E "${2}"= | while read line; do
        nvram set "${line}"
        done
        nvram commit
    }
    exit
elif [ "${1}" == 'move' ]; then
# Move nvram to file
    [ "${3}" == 'n' -a ! -z "${4}" ] && {
        [ "${4}" != 'f' ] && nvfile="${4}"
        nvram show | grep -v '_enable=\|_vmfile=' | grep -E "${2}" | while read line; do
        vn=$(echo ${line} | cut -d= -f1)
        nvfileset "${1}" "${line}" "${nvfile}"
        nvram unset "${vn}"
        done
        nvram commit
    }
# Move file to nvram
    [ ! -z "${3}" -a "${4}" == 'n' ] && {
        [ "${3}" != 'f' ] && nvfile="${3}"
        cat "${nvfile}" | grep -E "${2}" | while read line; do
        vn=$(echo ${line} | cut -d= -f1)
        nvram set "${line}"
        nvfileunset "${1}" "$vn" "$nvfile"
        done
        nvram commit
    }
elif [ "${1}" == 'remove' ]; then
    [ -z "${2}" ] && { echo -e \"parameter missing\"; exit; }
    [ ! -z "${3}" ] && nvfile="${3}"
    grep -E "${2}" "$nvfile" | cut -d= -f1 | while read line ; do nvfileunset "${1}" "${line}" "${nvfile}"; done
fi
}