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

   1 #!/bin/sh
   2 # Copyright (C) 2006-2014 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 # xor multiple hex values of the same length
  21 xor() {
  22         local val
  23         local ret="0x$1"
  24         local retlen=${#1}
  25
  26         shift
  27         while [ -n "$1" ]; do
  28                 val="0x$1"
  29                 ret=$((ret ^ val))
  30                 shift
  31         done
  32
  33         printf "%0${retlen}x" "$ret"
  34 }
  35
  36 append() {
  37         local var="$1"
  38         local value="$2"
  39         local sep="${3:- }"
  40
  41         eval "export ${NO_EXPORT:+-n} -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
  42 }
  43
  44 list_contains() {
  45         local var="$1"
  46         local str="$2"
  47         local val
  48
  49         eval "val=\" \${$var} \""
  50         [ "${val%% $str *}" != "$val" ]
  51 }
  52
  53 config_load() {
  54         [ -n "$IPKG_INSTROOT" ] && return 0
  55         uci_load "$@"
  56 }
  57
  58 reset_cb() {
  59         config_cb() { return 0; }
  60         option_cb() { return 0; }
  61         list_cb() { return 0; }
  62 }
  63 reset_cb
  64
  65 package() {
  66         return 0
  67 }
  68
  69 config () {
  70         local cfgtype="$1"
  71         local name="$2"
  72
  73         export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$((CONFIG_NUM_SECTIONS + 1))
  74         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
  75         append CONFIG_SECTIONS "$name"
  76         export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
  77         config_set "$CONFIG_SECTION" "TYPE" "${cfgtype}"
  78         [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
  79 }
  80
  81 option () {
  82         local varname="$1"; shift
  83         local value="$*"
  84
  85         config_set "$CONFIG_SECTION" "${varname}" "${value}"
  86         [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
  87 }
  88
  89 list() {
  90         local varname="$1"; shift
  91         local value="$*"
  92         local len
  93
  94         config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
  95         [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
  96         len=$((len + 1))
  97         config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
  98         config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
  99         append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
 100         [ -n "$NO_CALLBACK" ] || list_cb "$varname" "$*"
 101 }
 102
 103 config_unset() {
 104         config_set "$1" "$2" ""
 105 }
 106
 107 # config_get <variable> <section> <option> [<default>]
 108 # config_get <section> <option>
 109 config_get() {
 110         case "$2${3:-$1}" in
 111                 *[!A-Za-z0-9_]*) : ;;
 112                 *)
 113                         case "$3" in
 114                                 "") eval echo "\"\${CONFIG_${1}_${2}:-\${4}}\"";;
 115                                 *)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
 116                         esac
 117                 ;;
 118         esac
 119 }
 120
 121 # get_bool <value> [<default>]
 122 get_bool() {
 123         local _tmp="$1"
 124         case "$_tmp" in
 125                 1|on|true|yes|enabled) _tmp=1;;
 126                 0|off|false|no|disabled) _tmp=0;;
 127                 *) _tmp="$2";;
 128         esac
 129         echo -n "$_tmp"
 130 }
 131
 132 # config_get_bool <variable> <section> <option> [<default>]
 133 config_get_bool() {
 134         local _tmp
 135         config_get _tmp "$2" "$3" "$4"
 136         _tmp="$(get_bool "$_tmp" "$4")"
 137         export ${NO_EXPORT:+-n} "$1=$_tmp"
 138 }
 139
 140 config_set() {
 141         local section="$1"
 142         local option="$2"
 143         local value="$3"
 144
 145         export ${NO_EXPORT:+-n} "CONFIG_${section}_${option}=${value}"
 146 }
 147
 148 config_foreach() {
 149         local ___function="$1"
 150         [ "$#" -ge 1 ] && shift
 151         local ___type="$1"
 152         [ "$#" -ge 1 ] && shift
 153         local section cfgtype
 154
 155         [ -z "$CONFIG_SECTIONS" ] && return 0
 156         for section in ${CONFIG_SECTIONS}; do
 157                 config_get cfgtype "$section" TYPE
 158                 [ -n "$___type" ] && [ "x$cfgtype" != "x$___type" ] && continue
 159                 eval "$___function \"\$section\" \"\$@\""
 160         done
 161 }
 162
 163 config_list_foreach() {
 164         [ "$#" -ge 3 ] || return 0
 165         local section="$1"; shift
 166         local option="$1"; shift
 167         local function="$1"; shift
 168         local val
 169         local len
 170         local c=1
 171
 172         config_get len "${section}" "${option}_LENGTH"
 173         [ -z "$len" ] && return 0
 174         while [ $c -le "$len" ]; do
 175                 config_get val "${section}" "${option}_ITEM$c"
 176                 eval "$function \"\$val\" \"\$@\""
 177                 c="$((c + 1))"
 178         done
 179 }
 180
 181 default_prerm() {
 182         local root="${IPKG_INSTROOT}"
 183         local pkgname="$(basename ${1%.*})"
 184         local ret=0
 185
 186         if [ -f "$root/usr/lib/opkg/info/${pkgname}.prerm-pkg" ]; then
 187                 ( . "$root/usr/lib/opkg/info/${pkgname}.prerm-pkg" )
 188                 ret=$?
 189         fi
 190
 191         local shell="$(command -v bash)"
 192         for i in $(grep -s "^/etc/init.d/" "$root/usr/lib/opkg/info/${pkgname}.list"); do
 193                 if [ -n "$root" ]; then
 194                         ${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" disable
 195                 else
 196                         if [ "$PKG_UPGRADE" != "1" ]; then
 197                                 "$i" disable
 198                         fi
 199                         "$i" stop
 200                 fi
 201         done
 202
 203         return $ret
 204 }
 205
 206 add_group_and_user() {
 207         local pkgname="$1"
 208         local rusers="$(sed -ne 's/^Require-User: *//p' $root/usr/lib/opkg/info/${pkgname}.control 2>/dev/null)"
 209
 210         if [ -n "$rusers" ]; then
 211                 local tuple oIFS="$IFS"
 212                 for tuple in $rusers; do
 213                         local uid gid uname gname
 214
 215                         IFS=":"
 216                         set -- $tuple; uname="$1"; gname="$2"
 217                         IFS="="
 218                         set -- $uname; uname="$1"; uid="$2"
 219                         set -- $gname; gname="$1"; gid="$2"
 220                         IFS="$oIFS"
 221
 222                         if [ -n "$gname" ] && [ -n "$gid" ]; then
 223                                 group_exists "$gname" || group_add "$gname" "$gid"
 224                         elif [ -n "$gname" ]; then
 225                                 gid="$(group_add_next "$gname")"
 226                         fi
 227
 228                         if [ -n "$uname" ]; then
 229                                 user_exists "$uname" || user_add "$uname" "$uid" "$gid"
 230                         fi
 231
 232                         if [ -n "$uname" ] && [ -n "$gname" ]; then
 233                                 group_add_user "$gname" "$uname"
 234                         fi
 235
 236                         unset uid gid uname gname
 237                 done
 238         fi
 239 }
 240
 241 default_postinst() {
 242         local root="${IPKG_INSTROOT}"
 243         local pkgname="$(basename ${1%.*})"
 244         local filelist="/usr/lib/opkg/info/${pkgname}.list"
 245         local ret=0
 246
 247         add_group_and_user "${pkgname}"
 248
 249         if [ -f "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" ]; then
 250                 ( . "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" )
 251                 ret=$?
 252         fi
 253
 254         if [ -d "$root/rootfs-overlay" ]; then
 255                 cp -R $root/rootfs-overlay/. $root/
 256                 rm -fR $root/rootfs-overlay/
 257         fi
 258
 259         if [ -z "$root" ]; then
 260                 if grep -m1 -q -s "^/etc/modules.d/" "$filelist"; then
 261                         kmodloader
 262                 fi
 263
 264                 if grep -m1 -q -s "^/etc/sysctl.d/" "$filelist"; then
 265                         /etc/init.d/sysctl restart
 266                 fi
 267
 268                 if grep -m1 -q -s "^/etc/uci-defaults/" "$filelist"; then
 269                         [ -d /tmp/.uci ] || mkdir -p /tmp/.uci
 270                         for i in $(grep -s "^/etc/uci-defaults/" "$filelist"); do
 271                                 ( [ -f "$i" ] && cd "$(dirname $i)" && . "$i" ) && rm -f "$i"
 272                         done
 273                         uci commit
 274                 fi
 275
 276                 rm -f /tmp/luci-indexcache
 277         fi
 278
 279         local shell="$(command -v bash)"
 280         for i in $(grep -s "^/etc/init.d/" "$root$filelist"); do
 281                 if [ -n "$root" ]; then
 282                         ${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" enable
 283                 else
 284                         if [ "$PKG_UPGRADE" != "1" ]; then
 285                                 "$i" enable
 286                         fi
 287                         "$i" start
 288                 fi
 289         done
 290
 291         return $ret
 292 }
 293
 294 include() {
 295         local file
 296
 297         for file in $(ls $1/*.sh 2>/dev/null); do
 298                 . $file
 299         done
 300 }
 301
 302 find_mtd_index() {
 303         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 304         local INDEX="${PART##mtd}"
 305
 306         echo ${INDEX}
 307 }
 308
 309 find_mtd_part() {
 310         local INDEX=$(find_mtd_index "$1")
 311         local PREFIX=/dev/mtdblock
 312
 313         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 314         echo "${INDEX:+$PREFIX$INDEX}"
 315 }
 316
 317 group_add() {
 318         local name="$1"
 319         local gid="$2"
 320         local rc
 321         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 322         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 323         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 324         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 325 }
 326
 327 group_exists() {
 328         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 329 }
 330
 331 group_add_next() {
 332         local gid gids
 333         gid=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
 334         if [ -n "$gid" ]; then
 335                 echo $gid
 336                 return
 337         fi
 338         gids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/group)
 339         gid=65536
 340         while echo "$gids" | grep -q "^$gid$"; do
 341                 gid=$((gid + 1))
 342         done
 343         group_add $1 $gid
 344         echo $gid
 345 }
 346
 347 group_add_user() {
 348         local grp delim=","
 349         grp=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group)
 350         echo "$grp" | cut -d: -f4 | grep -q $2 && return
 351         echo "$grp" | grep -q ":$" && delim=""
 352         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 353         sed -i "s/$grp/$grp$delim$2/g" ${IPKG_INSTROOT}/etc/group
 354         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 355 }
 356
 357 user_add() {
 358         local name="${1}"
 359         local uid="${2}"
 360         local gid="${3}"
 361         local desc="${4:-$1}"
 362         local home="${5:-/var/run/$1}"
 363         local shell="${6:-/bin/false}"
 364         local rc
 365         [ -z "$uid" ] && {
 366                 uids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/passwd)
 367                 uid=65536
 368                 while echo "$uids" | grep -q "^$uid$"; do
 369                         uid=$((uid + 1))
 370                 done
 371         }
 372         [ -z "$gid" ] && gid=$uid
 373         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 374         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 375         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 376         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 377         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 378 }
 379
 380 user_exists() {
 381         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 382 }
 383
 384 board_name() {
 385         [ -e /tmp/sysinfo/board_name ] && cat /tmp/sysinfo/board_name || echo "generic"
 386 }
 387
 388 [ -z "$IPKG_INSTROOT" ] && [ -f /lib/config/uci.sh ] && . /lib/config/uci.sh