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 hotplug_dev() {
  21         env -i ACTION=$1 INTERFACE=$2 /sbin/hotplug-call net
  22 }
  23
  24 append() {
  25         local var="$1"
  26         local value="$2"
  27         local sep="${3:- }"
  28
  29         eval "export ${NO_EXPORT:+-n} -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
  30 }
  31
  32 list_contains() {
  33         local var="$1"
  34         local str="$2"
  35         local val
  36
  37         eval "val=\" \${$var} \""
  38         [ "${val%% $str *}" != "$val" ]
  39 }
  40
  41 list_remove() {
  42         local var="$1"
  43         local remove="$2"
  44         local val
  45
  46         eval "val=\" \${$var} \""
  47         val1="${val%% $remove *}"
  48         [ "$val1" = "$val" ] && return
  49         val2="${val##* $remove }"
  50         [ "$val2" = "$val" ] && return
  51         val="${val1## } ${val2%% }"
  52         val="${val%% }"
  53         eval "export ${NO_EXPORT:+-n} -- \"$var=\$val\""
  54 }
  55
  56 config_load() {
  57         [ -n "$IPKG_INSTROOT" ] && return 0
  58         uci_load "$@"
  59 }
  60
  61 reset_cb() {
  62         config_cb() { return 0; }
  63         option_cb() { return 0; }
  64         list_cb() { return 0; }
  65 }
  66 reset_cb
  67
  68 package() {
  69         return 0
  70 }
  71
  72 config () {
  73         local cfgtype="$1"
  74         local name="$2"
  75
  76         export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$(($CONFIG_NUM_SECTIONS + 1))
  77         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
  78         append CONFIG_SECTIONS "$name"
  79         [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
  80         export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
  81         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_TYPE=$cfgtype"
  82 }
  83
  84 option () {
  85         local varname="$1"; shift
  86         local value="$*"
  87
  88         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_${varname}=$value"
  89         [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
  90 }
  91
  92 list() {
  93         local varname="$1"; shift
  94         local value="$*"
  95         local len
  96
  97         config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
  98         [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
  99         len=$(($len + 1))
 100         config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
 101         config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
 102         append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
 103         list_cb "$varname" "$*"
 104 }
 105
 106 config_rename() {
 107         local OLD="$1"
 108         local NEW="$2"
 109         local oldvar
 110         local newvar
 111
 112         [ -n "$OLD" -a -n "$NEW" ] || return
 113         for oldvar in `set | grep ^CONFIG_${OLD}_ | \
 114                 sed -e 's/\(.*\)=.*$/\1/'` ; do
 115                 newvar="CONFIG_${NEW}_${oldvar##CONFIG_${OLD}_}"
 116                 eval "export ${NO_EXPORT:+-n} \"$newvar=\${$oldvar}\""
 117                 unset "$oldvar"
 118         done
 119         export ${NO_EXPORT:+-n} CONFIG_SECTIONS="$(echo " $CONFIG_SECTIONS " | sed -e "s, $OLD , $NEW ,")"
 120
 121         [ "$CONFIG_SECTION" = "$OLD" ] && export ${NO_EXPORT:+-n} CONFIG_SECTION="$NEW"
 122 }
 123
 124 config_unset() {
 125         config_set "$1" "$2" ""
 126 }
 127
 128 config_clear() {
 129         local SECTION="$1"
 130         local oldvar
 131
 132         list_remove CONFIG_SECTIONS "$SECTION"
 133         export ${NO_EXPORT:+-n} CONFIG_SECTIONS="${SECTION:+$CONFIG_SECTIONS}"
 134
 135         for oldvar in `set | grep ^CONFIG_${SECTION:+${SECTION}_} | \
 136                 sed -e 's/\(.*\)=.*$/\1/'` ; do
 137                 unset $oldvar
 138         done
 139 }
 140
 141 # config_get <variable> <section> <option> [<default>]
 142 # config_get <section> <option>
 143 config_get() {
 144         case "$3" in
 145                 "") eval echo "\${CONFIG_${1}_${2}:-\${4}}";;
 146                 *)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
 147         esac
 148 }
 149
 150 # config_get_bool <variable> <section> <option> [<default>]
 151 config_get_bool() {
 152         local _tmp
 153         config_get _tmp "$2" "$3" "$4"
 154         case "$_tmp" in
 155                 1|on|true|enabled) _tmp=1;;
 156                 0|off|false|disabled) _tmp=0;;
 157                 *) _tmp="$4";;
 158         esac
 159         export ${NO_EXPORT:+-n} "$1=$_tmp"
 160 }
 161
 162 config_set() {
 163         local section="$1"
 164         local option="$2"
 165         local value="$3"
 166         local old_section="$CONFIG_SECTION"
 167
 168         CONFIG_SECTION="$section"
 169         option "$option" "$value"
 170         CONFIG_SECTION="$old_section"
 171 }
 172
 173 config_foreach() {
 174         local ___function="$1"
 175         [ "$#" -ge 1 ] && shift
 176         local ___type="$1"
 177         [ "$#" -ge 1 ] && shift
 178         local section cfgtype
 179
 180         [ -z "$CONFIG_SECTIONS" ] && return 0
 181         for section in ${CONFIG_SECTIONS}; do
 182                 config_get cfgtype "$section" TYPE
 183                 [ -n "$___type" -a "x$cfgtype" != "x$___type" ] && continue
 184                 eval "$___function \"\$section\" \"\$@\""
 185         done
 186 }
 187
 188 config_list_foreach() {
 189         [ "$#" -ge 3 ] || return 0
 190         local section="$1"; shift
 191         local option="$1"; shift
 192         local function="$1"; shift
 193         local val
 194         local len
 195         local c=1
 196
 197         config_get len "${section}" "${option}_LENGTH"
 198         [ -z "$len" ] && return 0
 199         while [ $c -le "$len" ]; do
 200                 config_get val "${section}" "${option}_ITEM$c"
 201                 eval "$function \"\$val\" \"\$@\""
 202                 c="$(($c + 1))"
 203         done
 204 }
 205
 206 insert_modules() {
 207         [ -d /etc/modules.d ] && {
 208                 cd /etc/modules.d
 209                 sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
 210         }
 211 }
 212
 213 include() {
 214         local file
 215
 216         for file in $(ls $1/*.sh 2>/dev/null); do
 217                 . $file
 218         done
 219 }
 220
 221 find_mtd_index() {
 222         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 223         local INDEX="${PART##mtd}"
 224
 225         echo ${INDEX}
 226 }
 227
 228 find_mtd_part() {
 229         local INDEX=$(find_mtd_index "$1")
 230         local PREFIX=/dev/mtdblock
 231
 232         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 233         echo "${INDEX:+$PREFIX$INDEX}"
 234 }
 235
 236 find_mtd_chardev() {
 237         local INDEX=$(find_mtd_index "$1")
 238         local PREFIX=/dev/mtd
 239
 240         [ -d /dev/mtd ] && PREFIX=/dev/mtd/
 241         echo "${INDEX:+$PREFIX$INDEX}"
 242 }
 243
 244 mtd_get_mac_ascii()
 245 {
 246         local mtdname="$1"
 247         local key="$2"
 248         local part
 249         local mac_dirty
 250
 251         part=$(find_mtd_part "$mtdname")
 252         if [ -z "$part" ]; then
 253                 echo "mtd_get_mac_ascii: partition $mtdname not found!" >&2
 254                 return
 255         fi
 256
 257         mac_dirty=$(strings "$part" | sed -n 's/^'"$key"'=//p')
 258
 259         # "canonicalize" mac
 260         [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
 261 }
 262
 263 mtd_get_blob()
 264 {
 265         local mtdname="$1"
 266         local offset="$2"
 267         local count="$3"
 268         local firmware="$4"
 269         local part
 270
 271         part=$(find_mtd_part "$mtdname")
 272         if [ -z "$part" ]; then
 273                 echo "mtd_get_blob: partition $mtdname not found!" >&2
 274                 return 1
 275         fi
 276
 277         dd if=$part of=$firmware bs=1 skip=$offset count=$count 2>/dev/null || {
 278                 echo "mtd_get_blob: failed to extract $firmware from $part" >&2
 279                 return 1
 280         }
 281 }
 282
 283 mtd_get_mac_binary() {
 284         local mtdname="$1"
 285         local offset="$2"
 286         local part
 287
 288         part=$(find_mtd_part "$mtdname")
 289         if [ -z "$part" ]; then
 290                 echo "mtd_get_mac_binary: partition $mtdname not found!" >&2
 291                 return
 292         fi
 293
 294         dd bs=1 skip=$offset count=6 if=$part 2>/dev/null | hexdump -v -n 6 -e '5/1 "%02x:" 1/1 "%02x"'
 295 }
 296
 297 mtd_get_part_size() {
 298         local part_name=$1
 299         local first dev size erasesize name
 300         while read dev size erasesize name; do
 301                 name=${name#'"'}; name=${name%'"'}
 302                 if [ "$name" = "$part_name" ]; then
 303                         echo $((0x$size))
 304                         break
 305                 fi
 306         done < /proc/mtd
 307 }
 308
 309 macaddr_add() {
 310         local mac=$1
 311         local val=$2
 312         local oui=${mac%:*:*:*}
 313         local nic=${mac#*:*:*:}
 314
 315         nic=$(printf "%06x" $((0x${nic//:/} + $val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
 316         echo $oui:$nic
 317 }
 318
 319 macaddr_setbit_la()
 320 {
 321         local mac=$1
 322
 323         printf "%02x:%s" $((0x${mac%%:*} | 0x02)) ${mac#*:}
 324 }
 325
 326 macaddr_2bin()
 327 {
 328         local mac=$1
 329
 330         echo -ne \\x${mac//:/\\x}
 331 }
 332
 333 macaddr_canonicalize()
 334 {
 335         local mac="$1"
 336         local canon=""
 337
 338         [ ${#mac} -gt 17 ] && return
 339         [ -n "${mac//[a-fA-F0-9\.: -]/}" ] && return
 340
 341         for octet in ${mac//[\.:-]/ }; do
 342                 case "${#octet}" in
 343                 1)
 344                         octet="0${octet}"
 345                         ;;
 346                 2)
 347                         ;;
 348                 4)
 349                         octet="${octet:0:2} ${octet:2:2}"
 350                         ;;
 351                 12)
 352                         octet="${octet:0:2} ${octet:2:2} ${octet:4:2} ${octet:6:2} ${octet:8:2} ${octet:10:2}"
 353                         ;;
 354                 *)
 355                         return
 356                         ;;
 357                 esac
 358                 canon=${canon}${canon:+ }${octet}
 359         done
 360
 361         [ ${#canon} -ne 17 ] && return
 362
 363         printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${canon// / 0x} 2>/dev/null
 364 }
 365
 366 strtok() { # <string> { <variable> [<separator>] ... }
 367         local tmp
 368         local val="$1"
 369         local count=0
 370
 371         shift
 372
 373         while [ $# -gt 1 ]; do
 374                 tmp="${val%%$2*}"
 375
 376                 [ "$tmp" = "$val" ] && break
 377
 378                 val="${val#$tmp$2}"
 379
 380                 export ${NO_EXPORT:+-n} "$1=$tmp"; count=$((count+1))
 381                 shift 2
 382         done
 383
 384         if [ $# -gt 0 -a -n "$val" ]; then
 385                 export ${NO_EXPORT:+-n} "$1=$val"; count=$((count+1))
 386         fi
 387
 388         return $count
 389 }
 390
 391
 392 jffs2_mark_erase() {
 393         local part="$(find_mtd_part "$1")"
 394         [ -z "$part" ] && {
 395                 echo Partition not found.
 396                 return 1
 397         }
 398         echo -e "\xde\xad\xc0\xde" | mtd -qq write - "$1"
 399 }
 400
 401 uci_apply_defaults() {
 402         cd /etc/uci-defaults || return 0
 403         files="$(ls)"
 404         [ -z "$files" ] && return 0
 405         mkdir -p /tmp/.uci
 406         for file in $files; do
 407                 ( . "./$(basename $file)" ) && rm -f "$file"
 408         done
 409         uci commit
 410 }
 411
 412 group_add() {
 413         local name="$1"
 414         local gid="$2"
 415         local rc
 416         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 417         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 418         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 419         rc=$?
 420         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 421         return $rc
 422 }
 423
 424 group_exists() {
 425         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 426 }
 427
 428 user_add() {
 429         local name="${1}"
 430         local uid="${2}"
 431         local gid="${3:-$2}"
 432         local desc="${4:-$1}"
 433         local home="${5:-/var/run/$1}"
 434         local shell="${6:-/bin/false}"
 435         local rc
 436         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 437         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 438         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 439         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 440         rc=$?
 441         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 442         return $rc
 443 }
 444
 445 user_exists() {
 446         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 447 }
 448
 449
 450 pi_include() {
 451         if [ -f "/tmp/overlay/$1" ]; then
 452                 . "/tmp/overlay/$1"
 453         elif [ -f "$1" ]; then
 454                 . "$1"
 455         elif [ -d "/tmp/overlay/$1" ]; then
 456                 if [ -n "$(ls /tmp/overlay/$1/*.sh 2>/dev/null)" ]; then
 457                         for src_script in /tmp/overlay/$1/*.sh; do
 458                                 . "$src_script"
 459                         done
 460                 fi
 461         elif [ -d "$1" ]; then
 462                 if [ -n "$(ls $1/*.sh 2>/dev/null)" ]; then
 463                         for src_script in $1/*.sh; do
 464                                 . "$src_script"
 465                         done
 466                 fi
 467         else
 468                 echo "WARNING: $1 not found"
 469                 return 1
 470         fi
 471         return 0
 472 }
 473
 474 boot_hook_splice_start() {
 475         export -n PI_HOOK_SPLICE=1
 476 }
 477
 478 boot_hook_splice_finish() {
 479         local hook
 480         for hook in $PI_STACK_LIST; do
 481                 local v; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook"
 482                 export -n "${hook}=${v% }"
 483                 export -n "${hook}_splice="
 484         done
 485         export -n PI_HOOK_SPLICE=
 486 }
 487
 488 boot_hook_init() {
 489         local hook="${1}_hook"
 490         export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook"
 491         export -n "$hook="
 492 }
 493
 494 boot_hook_add() {
 495         local hook="${1}_hook${PI_HOOK_SPLICE:+_splice}"
 496         local func="${2}"
 497
 498         [ -n "$func" ] && {
 499                 local v; eval "v=\$$hook"
 500                 export -n "$hook=${v:+$v }$func"
 501         }
 502 }
 503
 504 boot_hook_shift() {
 505         local hook="${1}_hook"
 506         local rvar="${2}"
 507
 508         local v; eval "v=\$$hook"
 509         [ -n "$v" ] && {
 510                 local first="${v%% *}"
 511
 512                 [ "$v" != "${v#* }" ] && \
 513                         export -n "$hook=${v#* }" || \
 514                         export -n "$hook="
 515
 516                 export -n "$rvar=$first"
 517                 return 0
 518         }
 519
 520         return 1
 521 }
 522
 523 boot_run_hook() {
 524         local hook="$1"
 525         local func
 526
 527         while boot_hook_shift "$hook" func; do
 528                 local ran; eval "ran=\$PI_RAN_$func"
 529                 [ -n "$ran" ] || {
 530                         export -n "PI_RAN_$func=1"
 531                         $func "$1" "$2"
 532                 }
 533         done
 534 }
 535
 536 jffs2_ready() {
 537         mtdpart="$(find_mtd_part rootfs_data)"
 538         [ -z "$mtdpart" ] && return 1
 539         magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"')
 540         [ "$magic" != "deadc0de" ]
 541 }
 542
 543 dupe() { # <new_root> <old_root>
 544         cd $1
 545         echo -n "creating directories... "
 546         {
 547                 cd $2
 548                 find . -xdev -type d
 549                 echo "./dev ./overlay ./mnt ./proc ./tmp"
 550                 # xdev skips mounted directories
 551                 cd $1
 552         } | xargs mkdir -p
 553         echo "done"
 554
 555         echo -n "setting up symlinks... "
 556         for file in $(cd $2; find . -xdev -type f;); do
 557                 case "$file" in
 558                 ./rom/note) ;; #nothing
 559                 ./etc/config*|\
 560                 ./usr/lib/opkg/info/*) cp -af $2/$file $file;;
 561                 *) ln -sf /rom/${file#./*} $file;;
 562                 esac
 563         done
 564         for file in $(cd $2; find . -xdev -type l;); do
 565                 cp -af $2/${file#./*} $file
 566         done
 567         echo "done"
 568 }
 569
 570 pivot() { # <new_root> <old_root>
 571         mount -o noatime,move /proc $1/proc && \
 572         pivot_root $1 $1$2 && {
 573                 mount -o noatime,move $2/dev /dev
 574                 mount -o noatime,move $2/tmp /tmp
 575                 mount -o noatime,move $2/sys /sys 2>&-
 576                 mount -o noatime,move $2/overlay /overlay 2>&-
 577                 return 0
 578         }
 579 }
 580
 581 fopivot() { # <rw_root> <ro_root> <dupe?>
 582         root=$1
 583         {
 584                 if grep -q overlay /proc/filesystems; then
 585                         mount -o noatime,lowerdir=/,upperdir=$1 -t overlayfs "overlayfs:$1" /mnt && root=/mnt
 586                 elif grep -q mini_fo /proc/filesystems; then
 587                         mount -t mini_fo -o noatime,base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt
 588                 else
 589                         mount --bind -o noatime / /mnt
 590                         mount --bind -o noatime,union "$1" /mnt && root=/mnt
 591                 fi
 592         } || {
 593                 [ "$3" = "1" ] && {
 594                 mount | grep "on $1 type" 2>&- 1>&- || mount -o noatime,bind $1 $1
 595                 dupe $1 $rom
 596                 }
 597         }
 598         pivot $root $2
 599 }
 600
 601 ramoverlay() {
 602         mkdir -p /tmp/root
 603         mount -t tmpfs -o noatime,mode=0755 root /tmp/root
 604         fopivot /tmp/root /rom 1
 605 }
 606
 607 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh