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

   1 # Copyright (C) 2006-2014 OpenWrt.org
   2 # Copyright (C) 2006 Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
   3 # Copyright (C) 2010 Vertical Communications
   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 # xor multiple hex values of the same length
  20 xor() {
  21         local val
  22         local ret="0x$1"
  23         local retlen=${#1}
  24
  25         shift
  26         while [ -n "$1" ]; do
  27                 val="0x$1"
  28                 ret=$((ret ^ val))
  29                 shift
  30         done
  31
  32         printf "%0${retlen}x" "$ret"
  33 }
  34
  35 append() {
  36         local var="$1"
  37         local value="$2"
  38         local sep="${3:- }"
  39
  40         eval "export ${NO_EXPORT:+-n} -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
  41 }
  42
  43 list_contains() {
  44         local var="$1"
  45         local str="$2"
  46         local val
  47
  48         eval "val=\" \${$var} \""
  49         [ "${val%% $str *}" != "$val" ]
  50 }
  51
  52 config_load() {
  53         [ -n "$IPKG_INSTROOT" ] && return 0
  54         uci_load "$@"
  55 }
  56
  57 reset_cb() {
  58         config_cb() { return 0; }
  59         option_cb() { return 0; }
  60         list_cb() { return 0; }
  61 }
  62 reset_cb
  63
  64 package() {
  65         return 0
  66 }
  67
  68 config () {
  69         local cfgtype="$1"
  70         local name="$2"
  71
  72         export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$((CONFIG_NUM_SECTIONS + 1))
  73         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
  74         append CONFIG_SECTIONS "$name"
  75         export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
  76         config_set "$CONFIG_SECTION" "TYPE" "${cfgtype}"
  77         [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
  78 }
  79
  80 option () {
  81         local varname="$1"; shift
  82         local value="$*"
  83
  84         config_set "$CONFIG_SECTION" "${varname}" "${value}"
  85         [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
  86 }
  87
  88 list() {
  89         local varname="$1"; shift
  90         local value="$*"
  91         local len
  92
  93         config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
  94         [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
  95         len=$((len + 1))
  96         config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
  97         config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
  98         append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
  99         [ -n "$NO_CALLBACK" ] || list_cb "$varname" "$*"
 100 }
 101
 102 config_unset() {
 103         config_set "$1" "$2" ""
 104 }
 105
 106 # config_get <variable> <section> <option> [<default>]
 107 # config_get <section> <option>
 108 config_get() {
 109         case "$2${3:-$1}" in
 110                 *[!A-Za-z0-9_]*) : ;;
 111                 *)
 112                         case "$3" in
 113                                 "") eval echo "\"\${CONFIG_${1}_${2}:-\${4}}\"";;
 114                                 *)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
 115                         esac
 116                 ;;
 117         esac
 118 }
 119
 120 # get_bool <value> [<default>]
 121 get_bool() {
 122         local _tmp="$1"
 123         case "$_tmp" in
 124                 1|on|true|yes|enabled) _tmp=1;;
 125                 0|off|false|no|disabled) _tmp=0;;
 126                 *) _tmp="$2";;
 127         esac
 128         echo -n "$_tmp"
 129 }
 130
 131 # config_get_bool <variable> <section> <option> [<default>]
 132 config_get_bool() {
 133         local _tmp
 134         config_get _tmp "$2" "$3" "$4"
 135         _tmp="$(get_bool "$_tmp" "$4")"
 136         export ${NO_EXPORT:+-n} "$1=$_tmp"
 137 }
 138
 139 config_set() {
 140         local section="$1"
 141         local option="$2"
 142         local value="$3"
 143
 144         export ${NO_EXPORT:+-n} "CONFIG_${section}_${option}=${value}"
 145 }
 146
 147 config_foreach() {
 148         local ___function="$1"
 149         [ "$#" -ge 1 ] && shift
 150         local ___type="$1"
 151         [ "$#" -ge 1 ] && shift
 152         local section cfgtype
 153
 154         [ -z "$CONFIG_SECTIONS" ] && return 0
 155         for section in ${CONFIG_SECTIONS}; do
 156                 config_get cfgtype "$section" TYPE
 157                 [ -n "$___type" ] && [ "x$cfgtype" != "x$___type" ] && continue
 158                 eval "$___function \"\$section\" \"\$@\""
 159         done
 160 }
 161
 162 config_list_foreach() {
 163         [ "$#" -ge 3 ] || return 0
 164         local section="$1"; shift
 165         local option="$1"; shift
 166         local function="$1"; shift
 167         local val
 168         local len
 169         local c=1
 170
 171         config_get len "${section}" "${option}_LENGTH"
 172         [ -z "$len" ] && return 0
 173         while [ $c -le "$len" ]; do
 174                 config_get val "${section}" "${option}_ITEM$c"
 175                 eval "$function \"\$val\" \"\$@\""
 176                 c="$((c + 1))"
 177         done
 178 }
 179
 180 default_prerm() {
 181         local root="${IPKG_INSTROOT}"
 182         local pkgname="$(basename ${1%.*})"
 183         local ret=0
 184
 185         if [ -f "$root/usr/lib/opkg/info/${pkgname}.prerm-pkg" ]; then
 186                 ( . "$root/usr/lib/opkg/info/${pkgname}.prerm-pkg" )
 187                 ret=$?
 188         fi
 189
 190         local shell="$(command -v bash)"
 191         for i in $(grep -s "^/etc/init.d/" "$root/usr/lib/opkg/info/${pkgname}.list"); do
 192                 if [ -n "$root" ]; then
 193                         ${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" disable
 194                 else
 195                         if [ "$PKG_UPGRADE" != "1" ]; then
 196                                 "$i" disable
 197                         fi
 198                         "$i" stop
 199                 fi
 200         done
 201
 202         return $ret
 203 }
 204
 205 add_group_and_user() {
 206         local pkgname="$1"
 207         local rusers="$(sed -ne 's/^Require-User: *//p' $root/usr/lib/opkg/info/${pkgname}.control 2>/dev/null)"
 208
 209         if [ -n "$rusers" ]; then
 210                 local tuple oIFS="$IFS"
 211                 for tuple in $rusers; do
 212                         local uid gid uname gname addngroups addngroup addngname addngid
 213
 214                         IFS=":"
 215                         set -- $tuple; uname="$1"; gname="$2"; addngroups="$3"
 216                         IFS="="
 217                         set -- $uname; uname="$1"; uid="$2"
 218                         set -- $gname; gname="$1"; gid="$2"
 219                         IFS="$oIFS"
 220
 221                         if [ -n "$gname" ] && [ -n "$gid" ]; then
 222                                 group_exists "$gname" || group_add "$gname" "$gid"
 223                         elif [ -n "$gname" ]; then
 224                                 gid="$(group_add_next "$gname")"
 225                         fi
 226
 227                         if [ -n "$uname" ]; then
 228                                 user_exists "$uname" || user_add "$uname" "$uid" "$gid"
 229                         fi
 230
 231                         if [ -n "$uname" ] && [ -n "$gname" ]; then
 232                                 group_add_user "$gname" "$uname"
 233                         fi
 234
 235                         if [ -n "$uname" ] &&  [ -n "$addngroups" ]; then
 236                                 oIFS="$IFS"
 237                                 IFS=","
 238                                 for addngroup in $addngroups ; do
 239                                         IFS="="
 240                                         set -- $addngroup; addngname="$1"; addngid="$2"
 241                                         if [ -n "$addngid" ]; then
 242                                                 group_exists "$addngname" || group_add "$addngname" "$addngid"
 243                                         else
 244                                                 group_add_next "$addngname"
 245                                         fi
 246
 247                                         group_add_user "$addngname" "$uname"
 248                                 done
 249                                 IFS="$oIFS"
 250                         fi
 251
 252                         unset uid gid uname gname addngroups addngroup addngname addngid
 253                 done
 254         fi
 255 }
 256
 257 default_postinst() {
 258         local root="${IPKG_INSTROOT}"
 259         local pkgname="$(basename ${1%.*})"
 260         local filelist="/usr/lib/opkg/info/${pkgname}.list"
 261         local ret=0
 262
 263         add_group_and_user "${pkgname}"
 264
 265         if [ -f "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" ]; then
 266                 ( . "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" )
 267                 ret=$?
 268         fi
 269
 270         if [ -d "$root/rootfs-overlay" ]; then
 271                 cp -R $root/rootfs-overlay/. $root/
 272                 rm -fR $root/rootfs-overlay/
 273         fi
 274
 275         if [ -z "$root" ]; then
 276                 if grep -m1 -q -s "^/etc/modules.d/" "$filelist"; then
 277                         kmodloader
 278                 fi
 279
 280                 if grep -m1 -q -s "^/etc/sysctl.d/" "$filelist"; then
 281                         /etc/init.d/sysctl restart
 282                 fi
 283
 284                 if grep -m1 -q -s "^/etc/uci-defaults/" "$filelist"; then
 285                         [ -d /tmp/.uci ] || mkdir -p /tmp/.uci
 286                         for i in $(grep -s "^/etc/uci-defaults/" "$filelist"); do
 287                                 ( [ -f "$i" ] && cd "$(dirname $i)" && . "$i" ) && rm -f "$i"
 288                         done
 289                         uci commit
 290                 fi
 291
 292                 rm -f /tmp/luci-indexcache
 293         fi
 294
 295         local shell="$(command -v bash)"
 296         for i in $(grep -s "^/etc/init.d/" "$root$filelist"); do
 297                 if [ -n "$root" ]; then
 298                         ${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" enable
 299                 else
 300                         if [ "$PKG_UPGRADE" != "1" ]; then
 301                                 "$i" enable
 302                         fi
 303                         "$i" start
 304                 fi
 305         done
 306
 307         return $ret
 308 }
 309
 310 include() {
 311         local file
 312
 313         for file in $(ls $1/*.sh 2>/dev/null); do
 314                 . $file
 315         done
 316 }
 317
 318 find_mtd_index() {
 319         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 320         local INDEX="${PART##mtd}"
 321
 322         echo ${INDEX}
 323 }
 324
 325 find_mtd_part() {
 326         local INDEX=$(find_mtd_index "$1")
 327         local PREFIX=/dev/mtdblock
 328
 329         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 330         echo "${INDEX:+$PREFIX$INDEX}"
 331 }
 332
 333 find_mmc_part() {
 334         local DEVNAME PARTNAME ROOTDEV
 335
 336         if grep -q "$1" /proc/mtd; then
 337                 echo "" && return 0
 338         fi
 339
 340         if [ -n "$2" ]; then
 341                 ROOTDEV="$2"
 342         else
 343                 ROOTDEV="mmcblk*"
 344         fi
 345
 346         for DEVNAME in /sys/block/$ROOTDEV/mmcblk*p*; do
 347                 PARTNAME="$(grep PARTNAME ${DEVNAME}/uevent | cut -f2 -d'=')"
 348                 [ "$PARTNAME" = "$1" ] && echo "/dev/$(basename $DEVNAME)" && return 0
 349         done
 350 }
 351
 352 group_add() {
 353         local name="$1"
 354         local gid="$2"
 355         local rc
 356         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 357         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 358         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 359         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 360 }
 361
 362 group_exists() {
 363         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 364 }
 365
 366 group_add_next() {
 367         local gid gids
 368         gid=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
 369         if [ -n "$gid" ]; then
 370                 echo $gid
 371                 return
 372         fi
 373         gids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/group)
 374         gid=65536
 375         while echo "$gids" | grep -q "^$gid$"; do
 376                 gid=$((gid + 1))
 377         done
 378         group_add $1 $gid
 379         echo $gid
 380 }
 381
 382 group_add_user() {
 383         local grp delim=","
 384         grp=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group)
 385         echo "$grp" | cut -d: -f4 | grep -q $2 && return
 386         echo "$grp" | grep -q ":$" && delim=""
 387         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 388         sed -i "s/$grp/$grp$delim$2/g" ${IPKG_INSTROOT}/etc/group
 389         selinuxenabled 2>/dev/null && restorecon /etc/group
 390         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 391 }
 392
 393 user_add() {
 394         local name="${1}"
 395         local uid="${2}"
 396         local gid="${3}"
 397         local desc="${4:-$1}"
 398         local home="${5:-/var/run/$1}"
 399         local shell="${6:-/bin/false}"
 400         local rc
 401         [ -z "$uid" ] && {
 402                 uids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/passwd)
 403                 uid=65536
 404                 while echo "$uids" | grep -q "^$uid$"; do
 405                         uid=$((uid + 1))
 406                 done
 407         }
 408         [ -z "$gid" ] && gid=$uid
 409         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 410         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 411         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 412         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 413         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 414 }
 415
 416 user_exists() {
 417         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 418 }
 419
 420 board_name() {
 421         [ -e /tmp/sysinfo/board_name ] && cat /tmp/sysinfo/board_name || echo "generic"
 422 }
 423
 424 cmdline_get_var() {
 425         local var=$1
 426         local cmdlinevar tmp
 427
 428         for cmdlinevar in $(cat /proc/cmdline); do
 429                 tmp=${cmdlinevar##${var}}
 430                 [ "=" = "${tmp:0:1}" ] && echo ${tmp:1}
 431         done
 432 }
 433
 434 [ -z "$IPKG_INSTROOT" ] && [ -f /lib/config/uci.sh ] && . /lib/config/uci.sh