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 list_remove() {
  38         local var="$1"
  39         local remove="$2"
  40         local val
  41
  42         eval "val=\" \${$var} \""
  43         val1="${val%% $remove *}"
  44         [ "$val1" = "$val" ] && return
  45         val2="${val##* $remove }"
  46         [ "$val2" = "$val" ] && return
  47         val="${val1## } ${val2%% }"
  48         val="${val%% }"
  49         eval "export ${NO_EXPORT:+-n} -- \"$var=\$val\""
  50 }
  51
  52 config_load() {
  53         [ -n "$IPKG_INSTROOT" ] && return 0
  54         uci_load "$@"
  55 }
  56
  57 reset_cb() {
  58         config_cb() { return 0; }
  59         option_cb() { return 0; }
  60         list_cb() { return 0; }
  61 }
  62 reset_cb
  63
  64 package() {
  65         return 0
  66 }
  67
  68 config () {
  69         local cfgtype="$1"
  70         local name="$2"
  71
  72         export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$(($CONFIG_NUM_SECTIONS + 1))
  73         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
  74         append CONFIG_SECTIONS "$name"
  75         [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
  76         export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
  77         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_TYPE=$cfgtype"
  78 }
  79
  80 option () {
  81         local varname="$1"; shift
  82         local value="$*"
  83
  84         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_${varname}=$value"
  85         [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
  86 }
  87
  88 list() {
  89         local varname="$1"; shift
  90         local value="$*"
  91         local len
  92
  93         config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
  94         [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
  95         len=$(($len + 1))
  96         config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
  97         config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
  98         append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
  99         list_cb "$varname" "$*"
 100 }
 101
 102 config_rename() {
 103         local OLD="$1"
 104         local NEW="$2"
 105         local oldvar
 106         local newvar
 107
 108         [ -n "$OLD" -a -n "$NEW" ] || return
 109         for oldvar in `set | grep ^CONFIG_${OLD}_ | \
 110                 sed -e 's/\(.*\)=.*$/\1/'` ; do
 111                 newvar="CONFIG_${NEW}_${oldvar##CONFIG_${OLD}_}"
 112                 eval "export ${NO_EXPORT:+-n} \"$newvar=\${$oldvar}\""
 113                 unset "$oldvar"
 114         done
 115         export ${NO_EXPORT:+-n} CONFIG_SECTIONS="$(echo " $CONFIG_SECTIONS " | sed -e "s, $OLD , $NEW ,")"
 116
 117         [ "$CONFIG_SECTION" = "$OLD" ] && export ${NO_EXPORT:+-n} CONFIG_SECTION="$NEW"
 118 }
 119
 120 config_unset() {
 121         config_set "$1" "$2" ""
 122 }
 123
 124 config_clear() {
 125         local SECTION="$1"
 126         local oldvar
 127
 128         list_remove CONFIG_SECTIONS "$SECTION"
 129         export ${NO_EXPORT:+-n} CONFIG_SECTIONS="${SECTION:+$CONFIG_SECTIONS}"
 130
 131         for oldvar in `set | grep ^CONFIG_${SECTION:+${SECTION}_} | \
 132                 sed -e 's/\(.*\)=.*$/\1/'` ; do
 133                 unset $oldvar
 134         done
 135 }
 136
 137 # config_get <variable> <section> <option> [<default>]
 138 # config_get <section> <option>
 139 config_get() {
 140         case "$3" in
 141                 "") eval echo "\${CONFIG_${1}_${2}:-\${4}}";;
 142                 *)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
 143         esac
 144 }
 145
 146 # config_get_bool <variable> <section> <option> [<default>]
 147 config_get_bool() {
 148         local _tmp
 149         config_get _tmp "$2" "$3" "$4"
 150         case "$_tmp" in
 151                 1|on|true|enabled) _tmp=1;;
 152                 0|off|false|disabled) _tmp=0;;
 153                 *) _tmp="$4";;
 154         esac
 155         export ${NO_EXPORT:+-n} "$1=$_tmp"
 156 }
 157
 158 config_set() {
 159         local section="$1"
 160         local option="$2"
 161         local value="$3"
 162         local old_section="$CONFIG_SECTION"
 163
 164         CONFIG_SECTION="$section"
 165         option "$option" "$value"
 166         CONFIG_SECTION="$old_section"
 167 }
 168
 169 config_foreach() {
 170         local ___function="$1"
 171         [ "$#" -ge 1 ] && shift
 172         local ___type="$1"
 173         [ "$#" -ge 1 ] && shift
 174         local section cfgtype
 175
 176         [ -z "$CONFIG_SECTIONS" ] && return 0
 177         for section in ${CONFIG_SECTIONS}; do
 178                 config_get cfgtype "$section" TYPE
 179                 [ -n "$___type" -a "x$cfgtype" != "x$___type" ] && continue
 180                 eval "$___function \"\$section\" \"\$@\""
 181         done
 182 }
 183
 184 config_list_foreach() {
 185         [ "$#" -ge 3 ] || return 0
 186         local section="$1"; shift
 187         local option="$1"; shift
 188         local function="$1"; shift
 189         local val
 190         local len
 191         local c=1
 192
 193         config_get len "${section}" "${option}_LENGTH"
 194         [ -z "$len" ] && return 0
 195         while [ $c -le "$len" ]; do
 196                 config_get val "${section}" "${option}_ITEM$c"
 197                 eval "$function \"\$val\" \"\$@\""
 198                 c="$(($c + 1))"
 199         done
 200 }
 201
 202 insert_modules() {
 203         [ -d /etc/modules.d ] && {
 204                 cd /etc/modules.d
 205                 sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
 206         }
 207 }
 208
 209 include() {
 210         local file
 211
 212         for file in $(ls $1/*.sh 2>/dev/null); do
 213                 . $file
 214         done
 215 }
 216
 217 find_mtd_index() {
 218         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 219         local INDEX="${PART##mtd}"
 220
 221         echo ${INDEX}
 222 }
 223
 224 find_mtd_part() {
 225         local INDEX=$(find_mtd_index "$1")
 226         local PREFIX=/dev/mtdblock
 227
 228         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 229         echo "${INDEX:+$PREFIX$INDEX}"
 230 }
 231
 232 find_mtd_chardev() {
 233         local INDEX=$(find_mtd_index "$1")
 234         local PREFIX=/dev/mtd
 235
 236         [ -d /dev/mtd ] && PREFIX=/dev/mtd/
 237         echo "${INDEX:+$PREFIX$INDEX}"
 238 }
 239
 240 mtd_get_mac_ascii()
 241 {
 242         local mtdname="$1"
 243         local key="$2"
 244         local part
 245         local mac_dirty
 246
 247         part=$(find_mtd_part "$mtdname")
 248         if [ -z "$part" ]; then
 249                 echo "mtd_get_mac_ascii: partition $mtdname not found!" >&2
 250                 return
 251         fi
 252
 253         mac_dirty=$(strings "$part" | sed -n 's/^'"$key"'=//p')
 254
 255         # "canonicalize" mac
 256         [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
 257 }
 258
 259 mtd_get_blob()
 260 {
 261         local mtdname="$1"
 262         local offset="$2"
 263         local count="$3"
 264         local firmware="$4"
 265         local part
 266
 267         part=$(find_mtd_part "$mtdname")
 268         if [ -z "$part" ]; then
 269                 echo "mtd_get_blob: partition $mtdname not found!" >&2
 270                 return 1
 271         fi
 272
 273         dd if=$part of=$firmware bs=1 skip=$offset count=$count 2>/dev/null || {
 274                 echo "mtd_get_blob: failed to extract $firmware from $part" >&2
 275                 return 1
 276         }
 277 }
 278
 279 mtd_get_mac_binary() {
 280         local mtdname="$1"
 281         local offset="$2"
 282         local part
 283
 284         part=$(find_mtd_part "$mtdname")
 285         if [ -z "$part" ]; then
 286                 echo "mtd_get_mac_binary: partition $mtdname not found!" >&2
 287                 return
 288         fi
 289
 290         dd bs=1 skip=$offset count=6 if=$part 2>/dev/null | hexdump -v -n 6 -e '5/1 "%02x:" 1/1 "%02x"'
 291 }
 292
 293 mtd_get_part_size() {
 294         local part_name=$1
 295         local first dev size erasesize name
 296         while read dev size erasesize name; do
 297                 name=${name#'"'}; name=${name%'"'}
 298                 if [ "$name" = "$part_name" ]; then
 299                         echo $((0x$size))
 300                         break
 301                 fi
 302         done < /proc/mtd
 303 }
 304
 305 macaddr_add() {
 306         local mac=$1
 307         local val=$2
 308         local oui=${mac%:*:*:*}
 309         local nic=${mac#*:*:*:}
 310
 311         nic=$(printf "%06x" $((0x${nic//:/} + $val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
 312         echo $oui:$nic
 313 }
 314
 315 macaddr_setbit_la()
 316 {
 317         local mac=$1
 318
 319         printf "%02x:%s" $((0x${mac%%:*} | 0x02)) ${mac#*:}
 320 }
 321
 322 macaddr_2bin()
 323 {
 324         local mac=$1
 325
 326         echo -ne \\x${mac//:/\\x}
 327 }
 328
 329 macaddr_canonicalize()
 330 {
 331         local mac="$1"
 332         local canon=""
 333
 334         [ ${#mac} -gt 17 ] && return
 335         [ -n "${mac//[a-fA-F0-9\.: -]/}" ] && return
 336
 337         for octet in ${mac//[\.:-]/ }; do
 338                 case "${#octet}" in
 339                 1)
 340                         octet="0${octet}"
 341                         ;;
 342                 2)
 343                         ;;
 344                 4)
 345                         octet="${octet:0:2} ${octet:2:2}"
 346                         ;;
 347                 12)
 348                         octet="${octet:0:2} ${octet:2:2} ${octet:4:2} ${octet:6:2} ${octet:8:2} ${octet:10:2}"
 349                         ;;
 350                 *)
 351                         return
 352                         ;;
 353                 esac
 354                 canon=${canon}${canon:+ }${octet}
 355         done
 356
 357         [ ${#canon} -ne 17 ] && return
 358
 359         printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${canon// / 0x} 2>/dev/null
 360 }
 361
 362 jffs2_mark_erase() {
 363         local part="$(find_mtd_part "$1")"
 364         [ -z "$part" ] && {
 365                 echo Partition not found.
 366                 return 1
 367         }
 368         echo -e "\xde\xad\xc0\xde" | mtd -qq write - "$1"
 369 }
 370
 371 group_add() {
 372         local name="$1"
 373         local gid="$2"
 374         local rc
 375         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 376         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 377         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 378         rc=$?
 379         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 380         return $rc
 381 }
 382
 383 group_exists() {
 384         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 385 }
 386
 387 user_add() {
 388         local name="${1}"
 389         local uid="${2}"
 390         local gid="${3:-$2}"
 391         local desc="${4:-$1}"
 392         local home="${5:-/var/run/$1}"
 393         local shell="${6:-/bin/false}"
 394         local rc
 395         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 396         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 397         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 398         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 399         rc=$?
 400         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 401         return $rc
 402 }
 403
 404 user_exists() {
 405         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 406 }
 407
 408 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh