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 include() {
 207         local file
 208
 209         for file in $(ls $1/*.sh 2>/dev/null); do
 210                 . $file
 211         done
 212 }
 213
 214 find_mtd_index() {
 215         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 216         local INDEX="${PART##mtd}"
 217
 218         echo ${INDEX}
 219 }
 220
 221 find_mtd_part() {
 222         local INDEX=$(find_mtd_index "$1")
 223         local PREFIX=/dev/mtdblock
 224
 225         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 226         echo "${INDEX:+$PREFIX$INDEX}"
 227 }
 228
 229 find_mtd_chardev() {
 230         local INDEX=$(find_mtd_index "$1")
 231         local PREFIX=/dev/mtd
 232
 233         [ -d /dev/mtd ] && PREFIX=/dev/mtd/
 234         echo "${INDEX:+$PREFIX$INDEX}"
 235 }
 236
 237 mtd_get_mac_ascii()
 238 {
 239         local mtdname="$1"
 240         local key="$2"
 241         local part
 242         local mac_dirty
 243
 244         . /lib/functions.sh
 245
 246         part=$(find_mtd_part "$mtdname")
 247         if [ -z "$part" ]; then
 248                 echo "mtd_get_mac_ascii: partition $mtdname not found!" >&2
 249                 return
 250         fi
 251
 252         mac_dirty=$(strings "$part" | sed -n 's/'"$key"'=//p')
 253         # "canonicalize" mac
 254         printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${mac_dirty//:/ 0x}
 255 }
 256
 257 mtd_get_mac_binary() {
 258         local mtdname="$1"
 259         local offset="$2"
 260         local part
 261
 262         part=$(find_mtd_part "$mtdname")
 263         if [ -z "$part" ]; then
 264                 echo "mtd_get_mac_binary: partition $mtdname not found!" >&2
 265                 return
 266         fi
 267
 268         dd bs=1 skip=$offset count=6 if=$part 2>/dev/null | hexdump -v -n 6 -e '5/1 "%02x:" 1/1 "%02x"'
 269 }
 270
 271 macaddr_add() {
 272         local mac=$1
 273         local val=$2
 274         local oui=${mac%:*:*:*}
 275         local nic=${mac#*:*:*:}
 276
 277         nic=$(printf "%06x" $((0x${nic//:/} + $val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
 278         echo $oui:$nic
 279 }
 280
 281 macaddr_setbit_la()
 282 {
 283         local mac=$1
 284
 285         printf "%02x:%s" $((0x${mac%%:*} | 0x02)) ${mac#*:}
 286 }
 287
 288 macaddr_2bin()
 289 {
 290         local mac=$1
 291
 292         echo -ne \\x${mac//:/\\x}
 293 }
 294
 295 strtok() { # <string> { <variable> [<separator>] ... }
 296         local tmp
 297         local val="$1"
 298         local count=0
 299
 300         shift
 301
 302         while [ $# -gt 1 ]; do
 303                 tmp="${val%%$2*}"
 304
 305                 [ "$tmp" = "$val" ] && break
 306
 307                 val="${val#$tmp$2}"
 308
 309                 export ${NO_EXPORT:+-n} "$1=$tmp"; count=$((count+1))
 310                 shift 2
 311         done
 312
 313         if [ $# -gt 0 -a -n "$val" ]; then
 314                 export ${NO_EXPORT:+-n} "$1=$val"; count=$((count+1))
 315         fi
 316
 317         return $count
 318 }
 319
 320
 321 jffs2_mark_erase() {
 322         local part="$(find_mtd_part "$1")"
 323         [ -z "$part" ] && {
 324                 echo Partition not found.
 325                 return 1
 326         }
 327         echo -e "\xde\xad\xc0\xde" | mtd -qq write - "$1"
 328 }
 329
 330 uci_apply_defaults() {
 331         cd /etc/uci-defaults || return 0
 332         files="$(ls)"
 333         [ -z "$files" ] && return 0
 334         mkdir -p /tmp/.uci
 335         for file in $files; do
 336                 ( . "./$(basename $file)" ) && rm -f "$file"
 337         done
 338         uci commit
 339 }
 340
 341 group_add() {
 342         local name="$1"
 343         local gid="$2"
 344         local rc
 345         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 346         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 347         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 348         rc=$?
 349         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 350         return $rc
 351 }
 352
 353 group_exists() {
 354         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 355 }
 356
 357 user_add() {
 358         local name="${1}"
 359         local uid="${2}"
 360         local gid="${3:-$2}"
 361         local desc="${4:-$1}"
 362         local home="${5:-/var/run/$1}"
 363         local shell="${6:-/bin/false}"
 364         local rc
 365         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 366         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 367         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 368         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 369         rc=$?
 370         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 371         return $rc
 372 }
 373
 374 user_exists() {
 375         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 376 }
 377
 378
 379 pi_include() {
 380         if [ -f "/tmp/overlay/$1" ]; then
 381                 . "/tmp/overlay/$1"
 382         elif [ -f "$1" ]; then
 383                 . "$1"
 384         elif [ -d "/tmp/overlay/$1" ]; then
 385                 if [ -n "$(ls /tmp/overlay/$1/*.sh 2>/dev/null)" ]; then
 386                         for src_script in /tmp/overlay/$1/*.sh; do
 387                                 . "$src_script"
 388                         done
 389                 fi
 390         elif [ -d "$1" ]; then
 391                 if [ -n "$(ls $1/*.sh 2>/dev/null)" ]; then
 392                         for src_script in $1/*.sh; do
 393                                 . "$src_script"
 394                         done
 395                 fi
 396         else
 397                 echo "WARNING: $1 not found"
 398                 return 1
 399         fi
 400         return 0
 401 }
 402
 403 boot_hook_splice_start() {
 404         export -n PI_HOOK_SPLICE=1
 405 }
 406
 407 boot_hook_splice_finish() {
 408         local hook
 409         for hook in $PI_STACK_LIST; do
 410                 local v; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook"
 411                 export -n "${hook}=${v% }"
 412                 export -n "${hook}_splice="
 413         done
 414         export -n PI_HOOK_SPLICE=
 415 }
 416
 417 boot_hook_init() {
 418         local hook="${1}_hook"
 419         export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook"
 420         export -n "$hook="
 421 }
 422
 423 boot_hook_add() {
 424         local hook="${1}_hook${PI_HOOK_SPLICE:+_splice}"
 425         local func="${2}"
 426
 427         [ -n "$func" ] && {
 428                 local v; eval "v=\$$hook"
 429                 export -n "$hook=${v:+$v }$func"
 430         }
 431 }
 432
 433 boot_hook_shift() {
 434         local hook="${1}_hook"
 435         local rvar="${2}"
 436
 437         local v; eval "v=\$$hook"
 438         [ -n "$v" ] && {
 439                 local first="${v%% *}"
 440
 441                 [ "$v" != "${v#* }" ] && \
 442                         export -n "$hook=${v#* }" || \
 443                         export -n "$hook="
 444
 445                 export -n "$rvar=$first"
 446                 return 0
 447         }
 448
 449         return 1
 450 }
 451
 452 boot_run_hook() {
 453         local hook="$1"
 454         local func
 455
 456         while boot_hook_shift "$hook" func; do
 457                 local ran; eval "ran=\$PI_RAN_$func"
 458                 [ -n "$ran" ] || {
 459                         export -n "PI_RAN_$func=1"
 460                         $func "$1" "$2"
 461                 }
 462         done
 463 }
 464
 465 jffs2_ready() {
 466         mtdpart="$(find_mtd_part rootfs_data)"
 467         [ -z "$mtdpart" ] && return 1
 468         magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"')
 469         [ "$magic" != "deadc0de" ]
 470 }
 471
 472 dupe() { # <new_root> <old_root>
 473         cd $1
 474         echo -n "creating directories... "
 475         {
 476                 cd $2
 477                 find . -xdev -type d
 478                 echo "./dev ./overlay ./mnt ./proc ./tmp"
 479                 # xdev skips mounted directories
 480                 cd $1
 481         } | xargs mkdir -p
 482         echo "done"
 483
 484         echo -n "setting up symlinks... "
 485         for file in $(cd $2; find . -xdev -type f;); do
 486                 case "$file" in
 487                 ./rom/note) ;; #nothing
 488                 ./etc/config*|\
 489                 ./usr/lib/opkg/info/*) cp -af $2/$file $file;;
 490                 *) ln -sf /rom/${file#./*} $file;;
 491                 esac
 492         done
 493         for file in $(cd $2; find . -xdev -type l;); do
 494                 cp -af $2/${file#./*} $file
 495         done
 496         echo "done"
 497 }
 498
 499 pivot() { # <new_root> <old_root>
 500         mount -o noatime,move /proc $1/proc && \
 501         pivot_root $1 $1$2 && {
 502                 mount -o noatime,move $2/dev /dev
 503                 mount -o noatime,move $2/tmp /tmp
 504                 mount -o noatime,move $2/sys /sys 2>&-
 505                 mount -o noatime,move $2/overlay /overlay 2>&-
 506                 return 0
 507         }
 508 }
 509
 510 fopivot() { # <rw_root> <ro_root> <dupe?>
 511         root=$1
 512         {
 513                 if grep -q overlay /proc/filesystems; then
 514                         mount -o noatime,lowerdir=/,upperdir=$1 -t overlayfs "overlayfs:$1" /mnt && root=/mnt
 515                 elif grep -q mini_fo /proc/filesystems; then
 516                         mount -t mini_fo -o noatime,base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt
 517                 else
 518                         mount --bind -o noatime / /mnt
 519                         mount --bind -o noatime,union "$1" /mnt && root=/mnt
 520                 fi
 521         } || {
 522                 [ "$3" = "1" ] && {
 523                 mount | grep "on $1 type" 2>&- 1>&- || mount -o noatime,bind $1 $1
 524                 dupe $1 $rom
 525                 }
 526         }
 527         pivot $root $2
 528 }
 529
 530 ramoverlay() {
 531         mkdir -p /tmp/root
 532         mount -t tmpfs -o noatime,mode=0755 root /tmp/root
 533         fopivot /tmp/root /rom 1
 534 }
 535
 536 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh