package/base-files/files/lib/functions.sh

   1 #!/bin/sh
   2 # Copyright (C) 2006-2013 OpenWrt.org
   3 # Copyright (C) 2006 Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
   4 # Copyright (C) 2010 Vertical Communications
   5
   6
   7 debug () {
   8         ${DEBUG:-:} "$@"
   9 }
  10
  11 # newline
  12 N="
  13 "
  14
  15 _C=0
  16 NO_EXPORT=1
  17 LOAD_STATE=1
  18 LIST_SEP=" "
  19
  20 append() {
  21         local var="$1"
  22         local value="$2"
  23         local sep="${3:- }"
  24
  25         eval "export ${NO_EXPORT:+-n} -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
  26 }
  27
  28 list_contains() {
  29         local var="$1"
  30         local str="$2"
  31         local val
  32
  33         eval "val=\" \${$var} \""
  34         [ "${val%% $str *}" != "$val" ]
  35 }
  36
  37 config_load() {
  38         [ -n "$IPKG_INSTROOT" ] && return 0
  39         uci_load "$@"
  40 }
  41
  42 reset_cb() {
  43         config_cb() { return 0; }
  44         option_cb() { return 0; }
  45         list_cb() { return 0; }
  46 }
  47 reset_cb
  48
  49 package() {
  50         return 0
  51 }
  52
  53 config () {
  54         local cfgtype="$1"
  55         local name="$2"
  56
  57         export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$(($CONFIG_NUM_SECTIONS + 1))
  58         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
  59         append CONFIG_SECTIONS "$name"
  60         [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
  61         export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
  62         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_TYPE=$cfgtype"
  63 }
  64
  65 option () {
  66         local varname="$1"; shift
  67         local value="$*"
  68
  69         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_${varname}=$value"
  70         [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
  71 }
  72
  73 list() {
  74         local varname="$1"; shift
  75         local value="$*"
  76         local len
  77
  78         config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
  79         [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
  80         len=$(($len + 1))
  81         config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
  82         config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
  83         append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
  84         list_cb "$varname" "$*"
  85 }
  86
  87 config_rename() {
  88         local OLD="$1"
  89         local NEW="$2"
  90         local oldvar
  91         local newvar
  92
  93         [ -n "$OLD" -a -n "$NEW" ] || return
  94         for oldvar in `set | grep ^CONFIG_${OLD}_ | \
  95                 sed -e 's/\(.*\)=.*$/\1/'` ; do
  96                 newvar="CONFIG_${NEW}_${oldvar##CONFIG_${OLD}_}"
  97                 eval "export ${NO_EXPORT:+-n} \"$newvar=\${$oldvar}\""
  98                 unset "$oldvar"
  99         done
 100         export ${NO_EXPORT:+-n} CONFIG_SECTIONS="$(echo " $CONFIG_SECTIONS " | sed -e "s, $OLD , $NEW ,")"
 101
 102         [ "$CONFIG_SECTION" = "$OLD" ] && export ${NO_EXPORT:+-n} CONFIG_SECTION="$NEW"
 103 }
 104
 105 config_unset() {
 106         config_set "$1" "$2" ""
 107 }
 108
 109 # config_get <variable> <section> <option> [<default>]
 110 # config_get <section> <option>
 111 config_get() {
 112         case "$3" in
 113                 "") eval echo "\${CONFIG_${1}_${2}:-\${4}}";;
 114                 *)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
 115         esac
 116 }
 117
 118 # config_get_bool <variable> <section> <option> [<default>]
 119 config_get_bool() {
 120         local _tmp
 121         config_get _tmp "$2" "$3" "$4"
 122         case "$_tmp" in
 123                 1|on|true|enabled) _tmp=1;;
 124                 0|off|false|disabled) _tmp=0;;
 125                 *) _tmp="$4";;
 126         esac
 127         export ${NO_EXPORT:+-n} "$1=$_tmp"
 128 }
 129
 130 config_set() {
 131         local section="$1"
 132         local option="$2"
 133         local value="$3"
 134         local old_section="$CONFIG_SECTION"
 135
 136         CONFIG_SECTION="$section"
 137         option "$option" "$value"
 138         CONFIG_SECTION="$old_section"
 139 }
 140
 141 config_foreach() {
 142         local ___function="$1"
 143         [ "$#" -ge 1 ] && shift
 144         local ___type="$1"
 145         [ "$#" -ge 1 ] && shift
 146         local section cfgtype
 147
 148         [ -z "$CONFIG_SECTIONS" ] && return 0
 149         for section in ${CONFIG_SECTIONS}; do
 150                 config_get cfgtype "$section" TYPE
 151                 [ -n "$___type" -a "x$cfgtype" != "x$___type" ] && continue
 152                 eval "$___function \"\$section\" \"\$@\""
 153         done
 154 }
 155
 156 config_list_foreach() {
 157         [ "$#" -ge 3 ] || return 0
 158         local section="$1"; shift
 159         local option="$1"; shift
 160         local function="$1"; shift
 161         local val
 162         local len
 163         local c=1
 164
 165         config_get len "${section}" "${option}_LENGTH"
 166         [ -z "$len" ] && return 0
 167         while [ $c -le "$len" ]; do
 168                 config_get val "${section}" "${option}_ITEM$c"
 169                 eval "$function \"\$val\" \"\$@\""
 170                 c="$(($c + 1))"
 171         done
 172 }
 173
 174 insert_modules() {
 175         [ -d /etc/modules.d ] && {
 176                 cd /etc/modules.d
 177                 sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
 178         }
 179 }
 180
 181 include() {
 182         local file
 183
 184         for file in $(ls $1/*.sh 2>/dev/null); do
 185                 . $file
 186         done
 187 }
 188
 189 find_mtd_index() {
 190         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 191         local INDEX="${PART##mtd}"
 192
 193         echo ${INDEX}
 194 }
 195
 196 find_mtd_part() {
 197         local INDEX=$(find_mtd_index "$1")
 198         local PREFIX=/dev/mtdblock
 199
 200         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 201         echo "${INDEX:+$PREFIX$INDEX}"
 202 }
 203
 204 find_mtd_chardev() {
 205         local INDEX=$(find_mtd_index "$1")
 206         local PREFIX=/dev/mtd
 207
 208         [ -d /dev/mtd ] && PREFIX=/dev/mtd/
 209         echo "${INDEX:+$PREFIX$INDEX}"
 210 }
 211
 212 mtd_get_mac_ascii()
 213 {
 214         local mtdname="$1"
 215         local key="$2"
 216         local part
 217         local mac_dirty
 218
 219         part=$(find_mtd_part "$mtdname")
 220         if [ -z "$part" ]; then
 221                 echo "mtd_get_mac_ascii: partition $mtdname not found!" >&2
 222                 return
 223         fi
 224
 225         mac_dirty=$(strings "$part" | sed -n 's/^'"$key"'=//p')
 226
 227         # "canonicalize" mac
 228         [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
 229 }
 230
 231 mtd_get_blob()
 232 {
 233         local mtdname="$1"
 234         local offset="$2"
 235         local count="$3"
 236         local firmware="$4"
 237         local part
 238
 239         part=$(find_mtd_part "$mtdname")
 240         if [ -z "$part" ]; then
 241                 echo "mtd_get_blob: partition $mtdname not found!" >&2
 242                 return 1
 243         fi
 244
 245         dd if=$part of=$firmware bs=1 skip=$offset count=$count 2>/dev/null || {
 246                 echo "mtd_get_blob: failed to extract $firmware from $part" >&2
 247                 return 1
 248         }
 249 }
 250
 251 mtd_get_mac_binary() {
 252         local mtdname="$1"
 253         local offset="$2"
 254         local part
 255
 256         part=$(find_mtd_part "$mtdname")
 257         if [ -z "$part" ]; then
 258                 echo "mtd_get_mac_binary: partition $mtdname not found!" >&2
 259                 return
 260         fi
 261
 262         dd bs=1 skip=$offset count=6 if=$part 2>/dev/null | hexdump -v -n 6 -e '5/1 "%02x:" 1/1 "%02x"'
 263 }
 264
 265 mtd_get_part_size() {
 266         local part_name=$1
 267         local first dev size erasesize name
 268         while read dev size erasesize name; do
 269                 name=${name#'"'}; name=${name%'"'}
 270                 if [ "$name" = "$part_name" ]; then
 271                         echo $((0x$size))
 272                         break
 273                 fi
 274         done < /proc/mtd
 275 }
 276
 277 macaddr_add() {
 278         local mac=$1
 279         local val=$2
 280         local oui=${mac%:*:*:*}
 281         local nic=${mac#*:*:*:}
 282
 283         nic=$(printf "%06x" $((0x${nic//:/} + $val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
 284         echo $oui:$nic
 285 }
 286
 287 macaddr_setbit_la()
 288 {
 289         local mac=$1
 290
 291         printf "%02x:%s" $((0x${mac%%:*} | 0x02)) ${mac#*:}
 292 }
 293
 294 macaddr_2bin()
 295 {
 296         local mac=$1
 297
 298         echo -ne \\x${mac//:/\\x}
 299 }
 300
 301 macaddr_canonicalize()
 302 {
 303         local mac="$1"
 304         local canon=""
 305
 306         [ ${#mac} -gt 17 ] && return
 307         [ -n "${mac//[a-fA-F0-9\.: -]/}" ] && return
 308
 309         for octet in ${mac//[\.:-]/ }; do
 310                 case "${#octet}" in
 311                 1)
 312                         octet="0${octet}"
 313                         ;;
 314                 2)
 315                         ;;
 316                 4)
 317                         octet="${octet:0:2} ${octet:2:2}"
 318                         ;;
 319                 12)
 320                         octet="${octet:0:2} ${octet:2:2} ${octet:4:2} ${octet:6:2} ${octet:8:2} ${octet:10:2}"
 321                         ;;
 322                 *)
 323                         return
 324                         ;;
 325                 esac
 326                 canon=${canon}${canon:+ }${octet}
 327         done
 328
 329         [ ${#canon} -ne 17 ] && return
 330
 331         printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${canon// / 0x} 2>/dev/null
 332 }
 333
 334 group_add() {
 335         local name="$1"
 336         local gid="$2"
 337         local rc
 338         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 339         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 340         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 341         rc=$?
 342         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 343         return $rc
 344 }
 345
 346 group_exists() {
 347         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 348 }
 349
 350 user_add() {
 351         local name="${1}"
 352         local uid="${2}"
 353         local gid="${3:-$2}"
 354         local desc="${4:-$1}"
 355         local home="${5:-/var/run/$1}"
 356         local shell="${6:-/bin/false}"
 357         local rc
 358         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 359         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 360         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 361         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 362         rc=$?
 363         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 364         return $rc
 365 }
 366
 367 user_exists() {
 368         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 369 }
 370
 371 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh