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" ] && echo ${mac_dirty} | tr [A-F] [a-f]
 261 }
 262
 263 mtd_get_mac_binary() {
 264         local mtdname="$1"
 265         local offset="$2"
 266         local part
 267
 268         part=$(find_mtd_part "$mtdname")
 269         if [ -z "$part" ]; then
 270                 echo "mtd_get_mac_binary: partition $mtdname not found!" >&2
 271                 return
 272         fi
 273
 274         dd bs=1 skip=$offset count=6 if=$part 2>/dev/null | hexdump -v -n 6 -e '5/1 "%02x:" 1/1 "%02x"'
 275 }
 276
 277 mtd_get_part_size() {
 278         local part_name=$1
 279         local first dev size erasesize name
 280         while read dev size erasesize name; do
 281                 name=${name#'"'}; name=${name%'"'}
 282                 if [ "$name" = "$part_name" ]; then
 283                         echo $((0x$size))
 284                         break
 285                 fi
 286         done < /proc/mtd
 287 }
 288
 289 macaddr_add() {
 290         local mac=$1
 291         local val=$2
 292         local oui=${mac%:*:*:*}
 293         local nic=${mac#*:*:*:}
 294
 295         nic=$(printf "%06x" $((0x${nic//:/} + $val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
 296         echo $oui:$nic
 297 }
 298
 299 macaddr_setbit_la()
 300 {
 301         local mac=$1
 302
 303         printf "%02x:%s" $((0x${mac%%:*} | 0x02)) ${mac#*:}
 304 }
 305
 306 macaddr_2bin()
 307 {
 308         local mac=$1
 309
 310         echo -ne \\x${mac//:/\\x}
 311 }
 312
 313 strtok() { # <string> { <variable> [<separator>] ... }
 314         local tmp
 315         local val="$1"
 316         local count=0
 317
 318         shift
 319
 320         while [ $# -gt 1 ]; do
 321                 tmp="${val%%$2*}"
 322
 323                 [ "$tmp" = "$val" ] && break
 324
 325                 val="${val#$tmp$2}"
 326
 327                 export ${NO_EXPORT:+-n} "$1=$tmp"; count=$((count+1))
 328                 shift 2
 329         done
 330
 331         if [ $# -gt 0 -a -n "$val" ]; then
 332                 export ${NO_EXPORT:+-n} "$1=$val"; count=$((count+1))
 333         fi
 334
 335         return $count
 336 }
 337
 338
 339 jffs2_mark_erase() {
 340         local part="$(find_mtd_part "$1")"
 341         [ -z "$part" ] && {
 342                 echo Partition not found.
 343                 return 1
 344         }
 345         echo -e "\xde\xad\xc0\xde" | mtd -qq write - "$1"
 346 }
 347
 348 uci_apply_defaults() {
 349         cd /etc/uci-defaults || return 0
 350         files="$(ls)"
 351         [ -z "$files" ] && return 0
 352         mkdir -p /tmp/.uci
 353         for file in $files; do
 354                 ( . "./$(basename $file)" ) && rm -f "$file"
 355         done
 356         uci commit
 357 }
 358
 359 group_add() {
 360         local name="$1"
 361         local gid="$2"
 362         local rc
 363         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 364         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 365         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 366         rc=$?
 367         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 368         return $rc
 369 }
 370
 371 group_exists() {
 372         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 373 }
 374
 375 user_add() {
 376         local name="${1}"
 377         local uid="${2}"
 378         local gid="${3:-$2}"
 379         local desc="${4:-$1}"
 380         local home="${5:-/var/run/$1}"
 381         local shell="${6:-/bin/false}"
 382         local rc
 383         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 384         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 385         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 386         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 387         rc=$?
 388         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 389         return $rc
 390 }
 391
 392 user_exists() {
 393         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 394 }
 395
 396
 397 pi_include() {
 398         if [ -f "/tmp/overlay/$1" ]; then
 399                 . "/tmp/overlay/$1"
 400         elif [ -f "$1" ]; then
 401                 . "$1"
 402         elif [ -d "/tmp/overlay/$1" ]; then
 403                 if [ -n "$(ls /tmp/overlay/$1/*.sh 2>/dev/null)" ]; then
 404                         for src_script in /tmp/overlay/$1/*.sh; do
 405                                 . "$src_script"
 406                         done
 407                 fi
 408         elif [ -d "$1" ]; then
 409                 if [ -n "$(ls $1/*.sh 2>/dev/null)" ]; then
 410                         for src_script in $1/*.sh; do
 411                                 . "$src_script"
 412                         done
 413                 fi
 414         else
 415                 echo "WARNING: $1 not found"
 416                 return 1
 417         fi
 418         return 0
 419 }
 420
 421 boot_hook_splice_start() {
 422         export -n PI_HOOK_SPLICE=1
 423 }
 424
 425 boot_hook_splice_finish() {
 426         local hook
 427         for hook in $PI_STACK_LIST; do
 428                 local v; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook"
 429                 export -n "${hook}=${v% }"
 430                 export -n "${hook}_splice="
 431         done
 432         export -n PI_HOOK_SPLICE=
 433 }
 434
 435 boot_hook_init() {
 436         local hook="${1}_hook"
 437         export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook"
 438         export -n "$hook="
 439 }
 440
 441 boot_hook_add() {
 442         local hook="${1}_hook${PI_HOOK_SPLICE:+_splice}"
 443         local func="${2}"
 444
 445         [ -n "$func" ] && {
 446                 local v; eval "v=\$$hook"
 447                 export -n "$hook=${v:+$v }$func"
 448         }
 449 }
 450
 451 boot_hook_shift() {
 452         local hook="${1}_hook"
 453         local rvar="${2}"
 454
 455         local v; eval "v=\$$hook"
 456         [ -n "$v" ] && {
 457                 local first="${v%% *}"
 458
 459                 [ "$v" != "${v#* }" ] && \
 460                         export -n "$hook=${v#* }" || \
 461                         export -n "$hook="
 462
 463                 export -n "$rvar=$first"
 464                 return 0
 465         }
 466
 467         return 1
 468 }
 469
 470 boot_run_hook() {
 471         local hook="$1"
 472         local func
 473
 474         while boot_hook_shift "$hook" func; do
 475                 local ran; eval "ran=\$PI_RAN_$func"
 476                 [ -n "$ran" ] || {
 477                         export -n "PI_RAN_$func=1"
 478                         $func "$1" "$2"
 479                 }
 480         done
 481 }
 482
 483 jffs2_ready() {
 484         mtdpart="$(find_mtd_part rootfs_data)"
 485         [ -z "$mtdpart" ] && return 1
 486         magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"')
 487         [ "$magic" != "deadc0de" ]
 488 }
 489
 490 dupe() { # <new_root> <old_root>
 491         cd $1
 492         echo -n "creating directories... "
 493         {
 494                 cd $2
 495                 find . -xdev -type d
 496                 echo "./dev ./overlay ./mnt ./proc ./tmp"
 497                 # xdev skips mounted directories
 498                 cd $1
 499         } | xargs mkdir -p
 500         echo "done"
 501
 502         echo -n "setting up symlinks... "
 503         for file in $(cd $2; find . -xdev -type f;); do
 504                 case "$file" in
 505                 ./rom/note) ;; #nothing
 506                 ./etc/config*|\
 507                 ./usr/lib/opkg/info/*) cp -af $2/$file $file;;
 508                 *) ln -sf /rom/${file#./*} $file;;
 509                 esac
 510         done
 511         for file in $(cd $2; find . -xdev -type l;); do
 512                 cp -af $2/${file#./*} $file
 513         done
 514         echo "done"
 515 }
 516
 517 pivot() { # <new_root> <old_root>
 518         mount -o noatime,move /proc $1/proc && \
 519         pivot_root $1 $1$2 && {
 520                 mount -o noatime,move $2/dev /dev
 521                 mount -o noatime,move $2/tmp /tmp
 522                 mount -o noatime,move $2/sys /sys 2>&-
 523                 mount -o noatime,move $2/overlay /overlay 2>&-
 524                 return 0
 525         }
 526 }
 527
 528 fopivot() { # <rw_root> <ro_root> <dupe?>
 529         root=$1
 530         {
 531                 if grep -q overlay /proc/filesystems; then
 532                         mount -o noatime,lowerdir=/,upperdir=$1 -t overlayfs "overlayfs:$1" /mnt && root=/mnt
 533                 elif grep -q mini_fo /proc/filesystems; then
 534                         mount -t mini_fo -o noatime,base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt
 535                 else
 536                         mount --bind -o noatime / /mnt
 537                         mount --bind -o noatime,union "$1" /mnt && root=/mnt
 538                 fi
 539         } || {
 540                 [ "$3" = "1" ] && {
 541                 mount | grep "on $1 type" 2>&- 1>&- || mount -o noatime,bind $1 $1
 542                 dupe $1 $rom
 543                 }
 544         }
 545         pivot $root $2
 546 }
 547
 548 ramoverlay() {
 549         mkdir -p /tmp/root
 550         mount -t tmpfs -o noatime,mode=0755 root /tmp/root
 551         fopivot /tmp/root /rom 1
 552 }
 553
 554 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh