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

   1 #!/bin/sh
   2 # Copyright (C) 2006-2011 OpenWrt.org
   3 # Copyright (C) 2006 Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
   4
   5
   6 debug () {
   7         ${DEBUG:-:} "$@"
   8 }
   9
  10 # newline
  11 N="
  12 "
  13
  14 _C=0
  15 NO_EXPORT=1
  16 LOAD_STATE=1
  17 LIST_SEP=" "
  18
  19 hotplug_dev() {
  20         env -i ACTION=$1 INTERFACE=$2 /sbin/hotplug-call net
  21 }
  22
  23 append() {
  24         local var="$1"
  25         local value="$2"
  26         local sep="${3:- }"
  27
  28         eval "export ${NO_EXPORT:+-n} -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
  29 }
  30
  31 list_contains() {
  32         local var="$1"
  33         local str="$2"
  34         local val
  35
  36         eval "val=\" \${$var} \""
  37         [ "${val%% $str *}" != "$val" ]
  38 }
  39
  40 list_remove() {
  41         local var="$1"
  42         local remove="$2"
  43         local val
  44
  45         eval "val=\" \${$var} \""
  46         val1="${val%% $remove *}"
  47         [ "$val1" = "$val" ] && return
  48         val2="${val##* $remove }"
  49         [ "$val2" = "$val" ] && return
  50         val="${val1## } ${val2%% }"
  51         val="${val%% }"
  52         eval "export ${NO_EXPORT:+-n} -- \"$var=\$val\""
  53 }
  54
  55 config_load() {
  56         [ -n "$IPKG_INSTROOT" ] && return 0
  57         uci_load "$@"
  58 }
  59
  60 reset_cb() {
  61         config_cb() { return 0; }
  62         option_cb() { return 0; }
  63         list_cb() { return 0; }
  64 }
  65 reset_cb
  66
  67 package() {
  68         return 0
  69 }
  70
  71 config () {
  72         local cfgtype="$1"
  73         local name="$2"
  74
  75         export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$(($CONFIG_NUM_SECTIONS + 1))
  76         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
  77         append CONFIG_SECTIONS "$name"
  78         [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
  79         export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
  80         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_TYPE=$cfgtype"
  81 }
  82
  83 option () {
  84         local varname="$1"; shift
  85         local value="$*"
  86
  87         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_${varname}=$value"
  88         [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
  89 }
  90
  91 list() {
  92         local varname="$1"; shift
  93         local value="$*"
  94         local len
  95
  96         config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
  97         [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
  98         len=$(($len + 1))
  99         config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
 100         config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
 101         append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
 102         list_cb "$varname" "$*"
 103 }
 104
 105 config_rename() {
 106         local OLD="$1"
 107         local NEW="$2"
 108         local oldvar
 109         local newvar
 110
 111         [ -n "$OLD" -a -n "$NEW" ] || return
 112         for oldvar in `set | grep ^CONFIG_${OLD}_ | \
 113                 sed -e 's/\(.*\)=.*$/\1/'` ; do
 114                 newvar="CONFIG_${NEW}_${oldvar##CONFIG_${OLD}_}"
 115                 eval "export ${NO_EXPORT:+-n} \"$newvar=\${$oldvar}\""
 116                 unset "$oldvar"
 117         done
 118         export ${NO_EXPORT:+-n} CONFIG_SECTIONS="$(echo " $CONFIG_SECTIONS " | sed -e "s, $OLD , $NEW ,")"
 119
 120         [ "$CONFIG_SECTION" = "$OLD" ] && export ${NO_EXPORT:+-n} CONFIG_SECTION="$NEW"
 121 }
 122
 123 config_unset() {
 124         config_set "$1" "$2" ""
 125 }
 126
 127 config_clear() {
 128         local SECTION="$1"
 129         local oldvar
 130
 131         list_remove CONFIG_SECTIONS "$SECTION"
 132         export ${NO_EXPORT:+-n} CONFIG_SECTIONS="${SECTION:+$CONFIG_SECTIONS}"
 133
 134         for oldvar in `set | grep ^CONFIG_${SECTION:+${SECTION}_} | \
 135                 sed -e 's/\(.*\)=.*$/\1/'` ; do
 136                 unset $oldvar
 137         done
 138 }
 139
 140 # config_get <variable> <section> <option> [<default>]
 141 # config_get <section> <option>
 142 config_get() {
 143         case "$3" in
 144                 "") eval echo "\${CONFIG_${1}_${2}:-\${4}}";;
 145                 *)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
 146         esac
 147 }
 148
 149 # config_get_bool <variable> <section> <option> [<default>]
 150 config_get_bool() {
 151         local _tmp
 152         config_get _tmp "$2" "$3" "$4"
 153         case "$_tmp" in
 154                 1|on|true|enabled) _tmp=1;;
 155                 0|off|false|disabled) _tmp=0;;
 156                 *) _tmp="$4";;
 157         esac
 158         export ${NO_EXPORT:+-n} "$1=$_tmp"
 159 }
 160
 161 config_set() {
 162         local section="$1"
 163         local option="$2"
 164         local value="$3"
 165         local old_section="$CONFIG_SECTION"
 166
 167         CONFIG_SECTION="$section"
 168         option "$option" "$value"
 169         CONFIG_SECTION="$old_section"
 170 }
 171
 172 config_foreach() {
 173         local ___function="$1"
 174         [ "$#" -ge 1 ] && shift
 175         local ___type="$1"
 176         [ "$#" -ge 1 ] && shift
 177         local section cfgtype
 178
 179         [ -z "$CONFIG_SECTIONS" ] && return 0
 180         for section in ${CONFIG_SECTIONS}; do
 181                 config_get cfgtype "$section" TYPE
 182                 [ -n "$___type" -a "x$cfgtype" != "x$___type" ] && continue
 183                 eval "$___function \"\$section\" \"\$@\""
 184         done
 185 }
 186
 187 config_list_foreach() {
 188         [ "$#" -ge 3 ] || return 0
 189         local section="$1"; shift
 190         local option="$1"; shift
 191         local function="$1"; shift
 192         local val
 193         local len
 194         local c=1
 195
 196         config_get len "${section}" "${option}_LENGTH"
 197         [ -z "$len" ] && return 0
 198         while [ $c -le "$len" ]; do
 199                 config_get val "${section}" "${option}_ITEM$c"
 200                 eval "$function \"\$val\" \"$@\""
 201                 c="$(($c + 1))"
 202         done
 203 }
 204
 205 load_modules() {
 206         [ -d /etc/modules.d ] && {
 207                 cd /etc/modules.d
 208                 sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
 209         }
 210 }
 211
 212 include() {
 213         local file
 214
 215         for file in $(ls $1/*.sh 2>/dev/null); do
 216                 . $file
 217         done
 218 }
 219
 220 find_mtd_index() {
 221         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 222         local INDEX="${PART##mtd}"
 223
 224         echo ${INDEX}
 225 }
 226
 227 find_mtd_part() {
 228         local INDEX=$(find_mtd_index "$1")
 229         local PREFIX=/dev/mtdblock
 230
 231         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 232         echo "${INDEX:+$PREFIX$INDEX}"
 233 }
 234
 235 find_mtd_chardev() {
 236         local INDEX=$(find_mtd_index "$1")
 237         local PREFIX=/dev/mtd
 238
 239         [ -d /dev/mtd ] && PREFIX=/dev/mtd/
 240         echo "${INDEX:+$PREFIX$INDEX}"
 241 }
 242
 243 strtok() { # <string> { <variable> [<separator>] ... }
 244         local tmp
 245         local val="$1"
 246         local count=0
 247
 248         shift
 249
 250         while [ $# -gt 1 ]; do
 251                 tmp="${val%%$2*}"
 252
 253                 [ "$tmp" = "$val" ] && break
 254
 255                 val="${val#$tmp$2}"
 256
 257                 export ${NO_EXPORT:+-n} "$1=$tmp"; count=$((count+1))
 258                 shift 2
 259         done
 260
 261         if [ $# -gt 0 -a -n "$val" ]; then
 262                 export ${NO_EXPORT:+-n} "$1=$val"; count=$((count+1))
 263         fi
 264
 265         return $count
 266 }
 267
 268
 269 jffs2_mark_erase() {
 270         local part="$(find_mtd_part "$1")"
 271         [ -z "$part" ] && {
 272                 echo Partition not found.
 273                 return 1
 274         }
 275         echo -e "\xde\xad\xc0\xde" | mtd -qq write - "$1"
 276 }
 277
 278 uci_apply_defaults() {
 279         cd /etc/uci-defaults || return 0
 280         files="$(ls)"
 281         [ -z "$files" ] && return 0
 282         mkdir -p /tmp/.uci
 283         for file in $files; do
 284                 ( . "./$(basename $file)" ) && rm -f "$file"
 285         done
 286         uci commit
 287 }
 288
 289 group_add() {
 290         local name="$1"
 291         local gid="$2"
 292         local rc
 293         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 294         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 295         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 296         rc=$?
 297         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 298         return $rc
 299 }
 300
 301 group_exists() {
 302         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 303 }
 304
 305 user_add() {
 306         local name="${1}"
 307         local uid="${2}"
 308         local gid="${3:-$2}"
 309         local desc="${4:-$1}"
 310         local home="${5:-/var/run/$1}"
 311         local shell="${6:-/bin/false}"
 312         local rc
 313         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 314         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 315         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 316         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 317         rc=$?
 318         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 319         return $rc
 320 }
 321
 322 user_exists() {
 323         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 324 }
 325
 326
 327 pi_include() {
 328         if [ -f "/tmp/overlay/$1" ]; then
 329                 . "/tmp/overlay/$1"
 330         elif [ -f "$1" ]; then
 331                 . "$1"
 332         elif [ -d "/tmp/overlay/$1" ]; then
 333                 if [ -n "$(ls /tmp/overlay/$1/*.sh 2>/dev/null)" ]; then
 334                         for src_script in /tmp/overlay/$1/*.sh; do
 335                                 . "$src_script"
 336                         done
 337                 fi
 338         elif [ -d "$1" ]; then
 339                 if [ -n "$(ls $1/*.sh 2>/dev/null)" ]; then
 340                         for src_script in $1/*.sh; do
 341                                 . "$src_script"
 342                         done
 343                 fi
 344         else
 345                 echo "WARNING: $1 not found"
 346                 return 1
 347         fi
 348         return 0
 349 }
 350
 351 #!/bin/sh
 352 # Copyright (C) 2006-2010 OpenWrt.org
 353 # Copyright (C) 2010 Vertical Communications
 354
 355 boot_hook_splice_start() {
 356         export -n PI_HOOK_SPLICE=1
 357 }
 358
 359 boot_hook_splice_finish() {
 360         local hook
 361         for hook in $PI_STACK_LIST; do
 362                 local v; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook"
 363                 export -n "${hook}=${v% }"
 364                 export -n "${hook}_splice="
 365         done
 366         export -n PI_HOOK_SPLICE=
 367 }
 368
 369 boot_hook_init() {
 370         local hook="${1}_hook"
 371         export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook"
 372         export -n "$hook="
 373 }
 374
 375 boot_hook_add() {
 376         local hook="${1}_hook${PI_HOOK_SPLICE:+_splice}"
 377         local func="${2}"
 378
 379         [ -n "$func" ] && {
 380                 local v; eval "v=\$$hook"
 381                 export -n "$hook=${v:+$v }$func"
 382         }
 383 }
 384
 385 boot_hook_shift() {
 386         local hook="${1}_hook"
 387         local rvar="${2}"
 388
 389         local v; eval "v=\$$hook"
 390         [ -n "$v" ] && {
 391                 local first="${v%% *}"
 392
 393                 [ "$v" != "${v#* }" ] && \
 394                         export -n "$hook=${v#* }" || \
 395                         export -n "$hook="
 396
 397                 export -n "$rvar=$first"
 398                 return 0
 399         }
 400
 401         return 1
 402 }
 403
 404 boot_run_hook() {
 405         local hook="$1"
 406         local func
 407
 408         while boot_hook_shift "$hook" func; do
 409                 local ran; eval "ran=\$PI_RAN_$func"
 410                 [ -n "$ran" ] || {
 411                         export -n "PI_RAN_$func=1"
 412                         $func "$1" "$2"
 413                 }
 414         done
 415 }
 416
 417 jffs2_ready () {
 418         mtdpart="$(find_mtd_part rootfs_data)"
 419         [ -z "$mtdpart" ] && return 1
 420         magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"')
 421         [ "$magic" != "deadc0de" ]
 422 }
 423
 424 dupe() { # <new_root> <old_root>
 425         cd $1
 426         echo -n "creating directories... "
 427         {
 428                 cd $2
 429                 find . -xdev -type d
 430                 echo "./dev ./overlay ./mnt ./proc ./tmp"
 431                 # xdev skips mounted directories
 432                 cd $1
 433         } | xargs mkdir -p
 434         echo "done"
 435
 436         echo -n "setting up symlinks... "
 437         for file in $(cd $2; find . -xdev -type f;); do
 438                 case "$file" in
 439                 ./rom/note) ;; #nothing
 440                 ./etc/config*|\
 441                 ./usr/lib/opkg/info/*) cp -af $2/$file $file;;
 442                 *) ln -sf /rom/${file#./*} $file;;
 443                 esac
 444         done
 445         for file in $(cd $2; find . -xdev -type l;); do
 446                 cp -af $2/${file#./*} $file
 447         done
 448         echo "done"
 449 }
 450
 451 pivot() { # <new_root> <old_root>
 452         mount -o noatime,move /proc $1/proc && \
 453         pivot_root $1 $1$2 && {
 454                 mount -o noatime,move $2/dev /dev
 455                 mount -o noatime,move $2/tmp /tmp
 456                 mount -o noatime,move $2/sys /sys 2>&-
 457                 mount -o noatime,move $2/overlay /overlay 2>&-
 458                 return 0
 459         }
 460 }
 461
 462 fopivot() { # <rw_root> <ro_root> <dupe?>
 463         root=$1
 464         {
 465                 if grep -q overlay /proc/filesystems; then
 466                         mount -o noatime,lowerdir=/,upperdir=$1 -t overlayfs "overlayfs:$1" /mnt && root=/mnt
 467                 elif grep -q mini_fo /proc/filesystems; then
 468                         mount -t mini_fo -o noatime,base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt
 469                 else
 470                         mount --bind -o noatime / /mnt
 471                         mount --bind -o noatime,union "$1" /mnt && root=/mnt
 472                 fi
 473         } || {
 474                 [ "$3" = "1" ] && {
 475                 mount | grep "on $1 type" 2>&- 1>&- || mount -o noatime,bind $1 $1
 476                 dupe $1 $rom
 477                 }
 478         }
 479         pivot $root $2
 480 }
 481
 482 ramoverlay() {
 483         mkdir -p /tmp/root
 484         mount -t tmpfs -o noatime,mode=0755 root /tmp/root
 485         fopivot /tmp/root /rom 1
 486 }
 487
 488 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh