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 prepend() {
  44         local var="$1"
  45         local value="$2"
  46         local sep="${3:- }"
  47
  48         eval "export ${NO_EXPORT:+-n} -- \"$var=\$value\${$var:+\${sep}\${$var}}\""
  49 }
  50
  51 list_contains() {
  52         local var="$1"
  53         local str="$2"
  54         local val
  55
  56         eval "val=\" \${$var} \""
  57         [ "${val%% $str *}" != "$val" ]
  58 }
  59
  60 config_load() {
  61         [ -n "$IPKG_INSTROOT" ] && return 0
  62         uci_load "$@"
  63 }
  64
  65 reset_cb() {
  66         config_cb() { return 0; }
  67         option_cb() { return 0; }
  68         list_cb() { return 0; }
  69 }
  70 reset_cb
  71
  72 package() {
  73         return 0
  74 }
  75
  76 config () {
  77         local cfgtype="$1"
  78         local name="$2"
  79
  80         export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$((CONFIG_NUM_SECTIONS + 1))
  81         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
  82         append CONFIG_SECTIONS "$name"
  83         export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
  84         config_set "$CONFIG_SECTION" "TYPE" "${cfgtype}"
  85         [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
  86 }
  87
  88 option () {
  89         local varname="$1"; shift
  90         local value="$*"
  91
  92         config_set "$CONFIG_SECTION" "${varname}" "${value}"
  93         [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
  94 }
  95
  96 list() {
  97         local varname="$1"; shift
  98         local value="$*"
  99         local len
 100
 101         config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
 102         [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
 103         len=$((len + 1))
 104         config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
 105         config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
 106         append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
 107         [ -n "$NO_CALLBACK" ] || list_cb "$varname" "$*"
 108 }
 109
 110 config_unset() {
 111         config_set "$1" "$2" ""
 112 }
 113
 114 # config_get <variable> <section> <option> [<default>]
 115 # config_get <section> <option>
 116 config_get() {
 117         case "$2${3:-$1}" in
 118                 *[!A-Za-z0-9_]*) : ;;
 119                 *)
 120                         case "$3" in
 121                                 "") eval echo "\"\${CONFIG_${1}_${2}:-\${4}}\"";;
 122                                 *)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
 123                         esac
 124                 ;;
 125         esac
 126 }
 127
 128 # get_bool <value> [<default>]
 129 get_bool() {
 130         local _tmp="$1"
 131         case "$_tmp" in
 132                 1|on|true|yes|enabled) _tmp=1;;
 133                 0|off|false|no|disabled) _tmp=0;;
 134                 *) _tmp="$2";;
 135         esac
 136         echo -n "$_tmp"
 137 }
 138
 139 # config_get_bool <variable> <section> <option> [<default>]
 140 config_get_bool() {
 141         local _tmp
 142         config_get _tmp "$2" "$3" "$4"
 143         _tmp="$(get_bool "$_tmp" "$4")"
 144         export ${NO_EXPORT:+-n} "$1=$_tmp"
 145 }
 146
 147 config_set() {
 148         local section="$1"
 149         local option="$2"
 150         local value="$3"
 151
 152         export ${NO_EXPORT:+-n} "CONFIG_${section}_${option}=${value}"
 153 }
 154
 155 config_foreach() {
 156         local ___function="$1"
 157         [ "$#" -ge 1 ] && shift
 158         local ___type="$1"
 159         [ "$#" -ge 1 ] && shift
 160         local section cfgtype
 161
 162         [ -z "$CONFIG_SECTIONS" ] && return 0
 163         for section in ${CONFIG_SECTIONS}; do
 164                 config_get cfgtype "$section" TYPE
 165                 [ -n "$___type" ] && [ "x$cfgtype" != "x$___type" ] && continue
 166                 eval "$___function \"\$section\" \"\$@\""
 167         done
 168 }
 169
 170 config_list_foreach() {
 171         [ "$#" -ge 3 ] || return 0
 172         local section="$1"; shift
 173         local option="$1"; shift
 174         local function="$1"; shift
 175         local val
 176         local len
 177         local c=1
 178
 179         config_get len "${section}" "${option}_LENGTH"
 180         [ -z "$len" ] && return 0
 181         while [ $c -le "$len" ]; do
 182                 config_get val "${section}" "${option}_ITEM$c"
 183                 eval "$function \"\$val\" \"\$@\""
 184                 c="$((c + 1))"
 185         done
 186 }
 187
 188 default_prerm() {
 189         local root="${IPKG_INSTROOT}"
 190         local pkgname="$(basename ${1%.*})"
 191         local ret=0
 192
 193         if [ -f "$root/usr/lib/opkg/info/${pkgname}.prerm-pkg" ]; then
 194                 ( . "$root/usr/lib/opkg/info/${pkgname}.prerm-pkg" )
 195                 ret=$?
 196         fi
 197
 198         local shell="$(command -v bash)"
 199         for i in $(grep -s "^/etc/init.d/" "$root/usr/lib/opkg/info/${pkgname}.list"); do
 200                 if [ -n "$root" ]; then
 201                         ${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" disable
 202                 else
 203                         if [ "$PKG_UPGRADE" != "1" ]; then
 204                                 "$i" disable
 205                         fi
 206                         "$i" stop
 207                 fi
 208         done
 209
 210         return $ret
 211 }
 212
 213 add_group_and_user() {
 214         local pkgname="$1"
 215         local rusers="$(sed -ne 's/^Require-User: *//p' $root/usr/lib/opkg/info/${pkgname}.control 2>/dev/null)"
 216
 217         if [ -n "$rusers" ]; then
 218                 local tuple oIFS="$IFS"
 219                 for tuple in $rusers; do
 220                         local uid gid uname gname addngroups addngroup addngname addngid
 221
 222                         IFS=":"
 223                         set -- $tuple; uname="$1"; gname="$2"; addngroups="$3"
 224                         IFS="="
 225                         set -- $uname; uname="$1"; uid="$2"
 226                         set -- $gname; gname="$1"; gid="$2"
 227                         IFS="$oIFS"
 228
 229                         if [ -n "$gname" ] && [ -n "$gid" ]; then
 230                                 group_exists "$gname" || group_add "$gname" "$gid"
 231                         elif [ -n "$gname" ]; then
 232                                 gid="$(group_add_next "$gname")"
 233                         fi
 234
 235                         if [ -n "$uname" ]; then
 236                                 user_exists "$uname" || user_add "$uname" "$uid" "$gid"
 237                         fi
 238
 239                         if [ -n "$uname" ] && [ -n "$gname" ]; then
 240                                 group_add_user "$gname" "$uname"
 241                         fi
 242
 243                         if [ -n "$uname" ] &&  [ -n "$addngroups" ]; then
 244                                 oIFS="$IFS"
 245                                 IFS=","
 246                                 for addngroup in $addngroups ; do
 247                                         IFS="="
 248                                         set -- $addngroup; addngname="$1"; addngid="$2"
 249                                         if [ -n "$addngid" ]; then
 250                                                 group_exists "$addngname" || group_add "$addngname" "$addngid"
 251                                         else
 252                                                 group_add_next "$addngname"
 253                                         fi
 254
 255                                         group_add_user "$addngname" "$uname"
 256                                 done
 257                                 IFS="$oIFS"
 258                         fi
 259
 260                         unset uid gid uname gname addngroups addngroup addngname addngid
 261                 done
 262         fi
 263 }
 264
 265 default_postinst() {
 266         local root="${IPKG_INSTROOT}"
 267         local pkgname="$(basename ${1%.*})"
 268         local filelist="/usr/lib/opkg/info/${pkgname}.list"
 269         local ret=0
 270
 271         add_group_and_user "${pkgname}"
 272
 273         if [ -d "$root/rootfs-overlay" ]; then
 274                 cp -R $root/rootfs-overlay/. $root/
 275                 rm -fR $root/rootfs-overlay/
 276         fi
 277
 278         if [ -z "$root" ]; then
 279                 if grep -m1 -q -s "^/etc/modules.d/" "$filelist"; then
 280                         kmodloader
 281                 fi
 282
 283                 if grep -m1 -q -s "^/etc/sysctl.d/" "$filelist"; then
 284                         /etc/init.d/sysctl restart
 285                 fi
 286
 287                 if grep -m1 -q -s "^/etc/uci-defaults/" "$filelist"; then
 288                         [ -d /tmp/.uci ] || mkdir -p /tmp/.uci
 289                         for i in $(grep -s "^/etc/uci-defaults/" "$filelist"); do
 290                                 ( [ -f "$i" ] && cd "$(dirname $i)" && . "$i" ) && rm -f "$i"
 291                         done
 292                         uci commit
 293                 fi
 294
 295                 rm -f /tmp/luci-indexcache
 296         fi
 297
 298         if [ -f "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" ]; then
 299                 ( . "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" )
 300                 ret=$?
 301         fi
 302
 303         local shell="$(command -v bash)"
 304         for i in $(grep -s "^/etc/init.d/" "$root$filelist"); do
 305                 if [ -n "$root" ]; then
 306                         ${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" enable
 307                 else
 308                         if [ "$PKG_UPGRADE" != "1" ]; then
 309                                 "$i" enable
 310                         fi
 311                         "$i" start
 312                 fi
 313         done
 314
 315         return $ret
 316 }
 317
 318 include() {
 319         local file
 320
 321         for file in $(ls $1/*.sh 2>/dev/null); do
 322                 . $file
 323         done
 324 }
 325
 326 ipcalc() {
 327         set -- $(ipcalc.sh "$@")
 328         [ $? -eq 0 ] && export -- "$@"
 329 }
 330
 331 find_mtd_index() {
 332         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 333         local INDEX="${PART##mtd}"
 334
 335         echo ${INDEX}
 336 }
 337
 338 find_mtd_part() {
 339         local INDEX=$(find_mtd_index "$1")
 340         local PREFIX=/dev/mtdblock
 341
 342         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 343         echo "${INDEX:+$PREFIX$INDEX}"
 344 }
 345
 346 find_mmc_part() {
 347         local DEVNAME PARTNAME ROOTDEV
 348
 349         if grep -q "$1" /proc/mtd; then
 350                 echo "" && return 0
 351         fi
 352
 353         if [ -n "$2" ]; then
 354                 ROOTDEV="$2"
 355         else
 356                 ROOTDEV="mmcblk*"
 357         fi
 358
 359         for DEVNAME in /sys/block/$ROOTDEV/mmcblk*p*; do
 360                 PARTNAME="$(grep PARTNAME ${DEVNAME}/uevent | cut -f2 -d'=')"
 361                 [ "$PARTNAME" = "$1" ] && echo "/dev/$(basename $DEVNAME)" && return 0
 362         done
 363 }
 364
 365 group_add() {
 366         local name="$1"
 367         local gid="$2"
 368         local rc
 369         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 370         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 371         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 372         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 373 }
 374
 375 group_exists() {
 376         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 377 }
 378
 379 group_add_next() {
 380         local gid gids
 381         gid=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
 382         if [ -n "$gid" ]; then
 383                 echo $gid
 384                 return
 385         fi
 386         gids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/group)
 387         gid=65536
 388         while echo "$gids" | grep -q "^$gid$"; do
 389                 gid=$((gid + 1))
 390         done
 391         group_add $1 $gid
 392         echo $gid
 393 }
 394
 395 group_add_user() {
 396         local grp delim=","
 397         grp=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group)
 398         echo "$grp" | cut -d: -f4 | grep -q $2 && return
 399         echo "$grp" | grep -q ":$" && delim=""
 400         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 401         sed -i "s/$grp/$grp$delim$2/g" ${IPKG_INSTROOT}/etc/group
 402         if [ -z "$IPKG_INSTROOT" ] && [ -x /usr/sbin/selinuxenabled ] && selinuxenabled; then
 403                 restorecon /etc/group
 404         fi
 405         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 406 }
 407
 408 user_add() {
 409         local name="${1}"
 410         local uid="${2}"
 411         local gid="${3}"
 412         local desc="${4:-$1}"
 413         local home="${5:-/var/run/$1}"
 414         local shell="${6:-/bin/false}"
 415         local rc
 416         [ -z "$uid" ] && {
 417                 uids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/passwd)
 418                 uid=65536
 419                 while echo "$uids" | grep -q "^$uid$"; do
 420                         uid=$((uid + 1))
 421                 done
 422         }
 423         [ -z "$gid" ] && gid=$uid
 424         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 425         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 426         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 427         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 428         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 429 }
 430
 431 user_exists() {
 432         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 433 }
 434
 435 board_name() {
 436         [ -e /tmp/sysinfo/board_name ] && cat /tmp/sysinfo/board_name || echo "generic"
 437 }
 438
 439 cmdline_get_var() {
 440         local var=$1
 441         local cmdlinevar tmp
 442
 443         for cmdlinevar in $(cat /proc/cmdline); do
 444                 tmp=${cmdlinevar##${var}}
 445                 [ "=" = "${tmp:0:1}" ] && echo ${tmp:1}
 446         done
 447 }
 448
 449 [ -z "$IPKG_INSTROOT" ] && [ -f /lib/config/uci.sh ] && . /lib/config/uci.sh