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 data_2bin() {
  36         local data=$1
  37         local len=${#1}
  38         local bin_data
  39
  40         for i in $(seq 0 2 $(($len - 1))); do
  41                 bin_data="${bin_data}\x${data:i:2}"
  42         done
  43
  44         echo -ne $bin_data
  45 }
  46
  47 data_2xor_val() {
  48         local data=$1
  49         local len=${#1}
  50         local xor_data
  51
  52         for i in $(seq 0 4 $(($len - 1))); do
  53                 xor_data="${xor_data}${data:i:4} "
  54         done
  55
  56         echo -n ${xor_data:0:-1}
  57 }
  58
  59 append() {
  60         local var="$1"
  61         local value="$2"
  62         local sep="${3:- }"
  63
  64         eval "export ${NO_EXPORT:+-n} -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
  65 }
  66
  67 prepend() {
  68         local var="$1"
  69         local value="$2"
  70         local sep="${3:- }"
  71
  72         eval "export ${NO_EXPORT:+-n} -- \"$var=\$value\${$var:+\${sep}\${$var}}\""
  73 }
  74
  75 list_contains() {
  76         local var="$1"
  77         local str="$2"
  78         local val
  79
  80         eval "val=\" \${$var} \""
  81         [ "${val%% $str *}" != "$val" ]
  82 }
  83
  84 config_load() {
  85         [ -n "$IPKG_INSTROOT" ] && return 0
  86         uci_load "$@"
  87 }
  88
  89 reset_cb() {
  90         config_cb() { return 0; }
  91         option_cb() { return 0; }
  92         list_cb() { return 0; }
  93 }
  94 reset_cb
  95
  96 package() {
  97         return 0
  98 }
  99
 100 config () {
 101         local cfgtype="$1"
 102         local name="$2"
 103
 104         export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$((CONFIG_NUM_SECTIONS + 1))
 105         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
 106         append CONFIG_SECTIONS "$name"
 107         export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
 108         config_set "$CONFIG_SECTION" "TYPE" "${cfgtype}"
 109         [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
 110 }
 111
 112 option () {
 113         local varname="$1"; shift
 114         local value="$*"
 115
 116         config_set "$CONFIG_SECTION" "${varname}" "${value}"
 117         [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
 118 }
 119
 120 list() {
 121         local varname="$1"; shift
 122         local value="$*"
 123         local len
 124
 125         config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
 126         [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
 127         len=$((len + 1))
 128         config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
 129         config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
 130         append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
 131         [ -n "$NO_CALLBACK" ] || list_cb "$varname" "$*"
 132 }
 133
 134 config_unset() {
 135         config_set "$1" "$2" ""
 136 }
 137
 138 # config_get <variable> <section> <option> [<default>]
 139 # config_get <section> <option>
 140 config_get() {
 141         case "$2${3:-$1}" in
 142                 *[!A-Za-z0-9_]*) : ;;
 143                 *)
 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         esac
 150 }
 151
 152 # get_bool <value> [<default>]
 153 get_bool() {
 154         local _tmp="$1"
 155         case "$_tmp" in
 156                 1|on|true|yes|enabled) _tmp=1;;
 157                 0|off|false|no|disabled) _tmp=0;;
 158                 *) _tmp="$2";;
 159         esac
 160         echo -n "$_tmp"
 161 }
 162
 163 # config_get_bool <variable> <section> <option> [<default>]
 164 config_get_bool() {
 165         local _tmp
 166         config_get _tmp "$2" "$3" "$4"
 167         _tmp="$(get_bool "$_tmp" "$4")"
 168         export ${NO_EXPORT:+-n} "$1=$_tmp"
 169 }
 170
 171 config_set() {
 172         local section="$1"
 173         local option="$2"
 174         local value="$3"
 175
 176         export ${NO_EXPORT:+-n} "CONFIG_${section}_${option}=${value}"
 177 }
 178
 179 config_foreach() {
 180         local ___function="$1"
 181         [ "$#" -ge 1 ] && shift
 182         local ___type="$1"
 183         [ "$#" -ge 1 ] && shift
 184         local section cfgtype
 185
 186         [ -z "$CONFIG_SECTIONS" ] && return 0
 187         for section in ${CONFIG_SECTIONS}; do
 188                 config_get cfgtype "$section" TYPE
 189                 [ -n "$___type" ] && [ "x$cfgtype" != "x$___type" ] && continue
 190                 eval "$___function \"\$section\" \"\$@\""
 191         done
 192 }
 193
 194 config_list_foreach() {
 195         [ "$#" -ge 3 ] || return 0
 196         local section="$1"; shift
 197         local option="$1"; shift
 198         local function="$1"; shift
 199         local val
 200         local len
 201         local c=1
 202
 203         config_get len "${section}" "${option}_LENGTH"
 204         [ -z "$len" ] && return 0
 205         while [ $c -le "$len" ]; do
 206                 config_get val "${section}" "${option}_ITEM$c"
 207                 eval "$function \"\$val\" \"\$@\""
 208                 c="$((c + 1))"
 209         done
 210 }
 211
 212 default_prerm() {
 213         local root="${IPKG_INSTROOT}"
 214         local pkgname="$(basename ${1%.*})"
 215         local ret=0
 216
 217         if [ -f "$root/usr/lib/opkg/info/${pkgname}.prerm-pkg" ]; then
 218                 ( . "$root/usr/lib/opkg/info/${pkgname}.prerm-pkg" )
 219                 ret=$?
 220         fi
 221
 222         local shell="$(command -v bash)"
 223         for i in $(grep -s "^/etc/init.d/" "$root/usr/lib/opkg/info/${pkgname}.list"); do
 224                 if [ -n "$root" ]; then
 225                         ${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" disable
 226                 else
 227                         if [ "$PKG_UPGRADE" != "1" ]; then
 228                                 "$i" disable
 229                         fi
 230                         "$i" stop
 231                 fi
 232         done
 233
 234         return $ret
 235 }
 236
 237 add_group_and_user() {
 238         local pkgname="$1"
 239         local rusers="$(sed -ne 's/^Require-User: *//p' $root/usr/lib/opkg/info/${pkgname}.control 2>/dev/null)"
 240
 241         if [ -n "$rusers" ]; then
 242                 local tuple oIFS="$IFS"
 243                 for tuple in $rusers; do
 244                         local uid gid uname gname addngroups addngroup addngname addngid
 245
 246                         IFS=":"
 247                         set -- $tuple; uname="$1"; gname="$2"; addngroups="$3"
 248                         IFS="="
 249                         set -- $uname; uname="$1"; uid="$2"
 250                         set -- $gname; gname="$1"; gid="$2"
 251                         IFS="$oIFS"
 252
 253                         if [ -n "$gname" ] && [ -n "$gid" ]; then
 254                                 group_exists "$gname" || group_add "$gname" "$gid"
 255                         elif [ -n "$gname" ]; then
 256                                 gid="$(group_add_next "$gname")"
 257                         fi
 258
 259                         if [ -n "$uname" ]; then
 260                                 user_exists "$uname" || user_add "$uname" "$uid" "$gid"
 261                         fi
 262
 263                         if [ -n "$uname" ] && [ -n "$gname" ]; then
 264                                 group_add_user "$gname" "$uname"
 265                         fi
 266
 267                         if [ -n "$uname" ] &&  [ -n "$addngroups" ]; then
 268                                 oIFS="$IFS"
 269                                 IFS=","
 270                                 for addngroup in $addngroups ; do
 271                                         IFS="="
 272                                         set -- $addngroup; addngname="$1"; addngid="$2"
 273                                         if [ -n "$addngid" ]; then
 274                                                 group_exists "$addngname" || group_add "$addngname" "$addngid"
 275                                         else
 276                                                 group_add_next "$addngname"
 277                                         fi
 278
 279                                         group_add_user "$addngname" "$uname"
 280                                 done
 281                                 IFS="$oIFS"
 282                         fi
 283
 284                         unset uid gid uname gname addngroups addngroup addngname addngid
 285                 done
 286         fi
 287 }
 288
 289 update_alternatives() {
 290         local root="${IPKG_INSTROOT}"
 291         local action="$1"
 292         local pkgname="$2"
 293
 294         if [ -f "$root/lib/apk/packages/${pkgname}.alternatives" ]; then
 295                 for pkg_alt in $(cat $root/lib/apk/packages/${pkgname}.alternatives); do
 296                         local best_prio=0;
 297                         local best_src="/bin/busybox";
 298                         pkg_prio=${pkg_alt%%:*};
 299                         pkg_target=${pkg_alt#*:};
 300                         pkg_target=${pkg_target%:*};
 301                         pkg_src=${pkg_alt##*:};
 302
 303                         if [ -e "$root/$target" ]; then
 304                                 for alts in $root/lib/apk/packages/*.alternatives; do
 305                                         for alt in $(cat $alts); do
 306                                                 prio=${alt%%:*};
 307                                                 target=${alt#*:};
 308                                                 target=${target%:*};
 309                                                 src=${alt##*:};
 310
 311                                                 if [ "$target" = "$pkg_target" ] &&
 312                                                    [ "$src" != "$pkg_src" ] &&
 313                                                    [ "$best_prio" -lt "$prio" ]; then
 314                                                         best_prio=$prio;
 315                                                         best_src=$src;
 316                                                 fi
 317                                         done
 318                                 done
 319                         fi
 320                         case "$action" in
 321                                 install)
 322                                         if [ "$best_prio" -lt "$pkg_prio" ]; then
 323                                                 ln -sf "$pkg_src" "$root/$pkg_target"
 324                                                 echo "add alternative: $pkg_target -> $pkg_src"
 325                                         fi
 326                                 ;;
 327                                 remove)
 328                                         if [ "$best_prio" -lt "$pkg_prio" ]; then
 329                                                 ln -sf "$best_src" "$root/$pkg_target"
 330                                                 echo "add alternative: $pkg_target -> $best_src"
 331                                         fi
 332                                 ;;
 333                         esac
 334                 done
 335         fi
 336 }
 337
 338 default_postinst() {
 339         local root="${IPKG_INSTROOT}"
 340         local pkgname="$(basename ${1%.*})"
 341         local filelist="/usr/lib/opkg/info/${pkgname}.list"
 342         local ret=0
 343
 344         add_group_and_user "${pkgname}"
 345
 346         if [ -d "$root/rootfs-overlay" ]; then
 347                 cp -R $root/rootfs-overlay/. $root/
 348                 rm -fR $root/rootfs-overlay/
 349         fi
 350
 351         if [ -z "$root" ]; then
 352                 if grep -m1 -q -s "^/etc/modules.d/" "$filelist"; then
 353                         kmodloader
 354                 fi
 355
 356                 if grep -m1 -q -s "^/etc/sysctl.d/" "$filelist"; then
 357                         /etc/init.d/sysctl restart
 358                 fi
 359
 360                 if grep -m1 -q -s "^/etc/uci-defaults/" "$filelist"; then
 361                         [ -d /tmp/.uci ] || mkdir -p /tmp/.uci
 362                         for i in $(grep -s "^/etc/uci-defaults/" "$filelist"); do
 363                                 ( [ -f "$i" ] && cd "$(dirname $i)" && . "$i" ) && rm -f "$i"
 364                         done
 365                         uci commit
 366                 fi
 367
 368                 rm -f /tmp/luci-indexcache
 369         fi
 370
 371         if [ -f "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" ]; then
 372                 ( . "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" )
 373                 ret=$?
 374         fi
 375
 376         local shell="$(command -v bash)"
 377         for i in $(grep -s "^/etc/init.d/" "$root$filelist"); do
 378                 if [ -n "$root" ]; then
 379                         ${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" enable
 380                 else
 381                         if [ "$PKG_UPGRADE" != "1" ]; then
 382                                 "$i" enable
 383                         fi
 384                         "$i" start
 385                 fi
 386         done
 387
 388         return $ret
 389 }
 390
 391 include() {
 392         local file
 393
 394         for file in $(ls $1/*.sh 2>/dev/null); do
 395                 . $file
 396         done
 397 }
 398
 399 ipcalc() {
 400         set -- $(ipcalc.sh "$@")
 401         [ $? -eq 0 ] && export -- "$@"
 402 }
 403
 404 find_mtd_index() {
 405         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 406         local INDEX="${PART##mtd}"
 407
 408         echo ${INDEX}
 409 }
 410
 411 find_mtd_part() {
 412         local INDEX=$(find_mtd_index "$1")
 413         local PREFIX=/dev/mtdblock
 414
 415         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 416         echo "${INDEX:+$PREFIX$INDEX}"
 417 }
 418
 419 find_mmc_part() {
 420         local DEVNAME PARTNAME ROOTDEV
 421
 422         if grep -q "$1" /proc/mtd; then
 423                 echo "" && return 0
 424         fi
 425
 426         if [ -n "$2" ]; then
 427                 ROOTDEV="$2"
 428         else
 429                 ROOTDEV="mmcblk*"
 430         fi
 431
 432         for DEVNAME in /sys/block/$ROOTDEV/mmcblk*p*; do
 433                 PARTNAME="$(grep PARTNAME ${DEVNAME}/uevent | cut -f2 -d'=')"
 434                 [ "$PARTNAME" = "$1" ] && echo "/dev/$(basename $DEVNAME)" && return 0
 435         done
 436 }
 437
 438 group_add() {
 439         local name="$1"
 440         local gid="$2"
 441         local rc
 442         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 443         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 444         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 445         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 446 }
 447
 448 group_exists() {
 449         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 450 }
 451
 452 group_add_next() {
 453         local gid gids
 454         gid=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
 455         if [ -n "$gid" ]; then
 456                 echo $gid
 457                 return
 458         fi
 459         gids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/group)
 460         gid=32768
 461         while echo "$gids" | grep -q "^$gid$"; do
 462                 gid=$((gid + 1))
 463         done
 464         group_add $1 $gid
 465         echo $gid
 466 }
 467
 468 group_add_user() {
 469         local grp delim=","
 470         grp=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group)
 471         echo "$grp" | cut -d: -f4 | grep -q $2 && return
 472         echo "$grp" | grep -q ":$" && delim=""
 473         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 474         sed -i "s/$grp/$grp$delim$2/g" ${IPKG_INSTROOT}/etc/group
 475         if [ -z "$IPKG_INSTROOT" ] && [ -x /usr/sbin/selinuxenabled ] && selinuxenabled; then
 476                 restorecon /etc/group
 477         fi
 478         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 479 }
 480
 481 user_add() {
 482         local name="${1}"
 483         local uid="${2}"
 484         local gid="${3}"
 485         local desc="${4:-$1}"
 486         local home="${5:-/var/run/$1}"
 487         local shell="${6:-/bin/false}"
 488         local rc
 489         [ -z "$uid" ] && {
 490                 uids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/passwd)
 491                 uid=32768
 492                 while echo "$uids" | grep -q "^$uid$"; do
 493                         uid=$((uid + 1))
 494                 done
 495         }
 496         [ -z "$gid" ] && gid=$uid
 497         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 498         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 499         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 500         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 501         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 502 }
 503
 504 user_exists() {
 505         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 506 }
 507
 508 board_name() {
 509         [ -e /tmp/sysinfo/board_name ] && cat /tmp/sysinfo/board_name || echo "generic"
 510 }
 511
 512 cmdline_get_var() {
 513         local var=$1
 514         local cmdlinevar tmp
 515
 516         for cmdlinevar in $(cat /proc/cmdline); do
 517                 tmp=${cmdlinevar##${var}}
 518                 [ "=" = "${tmp:0:1}" ] && echo ${tmp:1}
 519         done
 520 }
 521
 522 [ -z "$IPKG_INSTROOT" ] && [ -f /lib/config/uci.sh ] && . /lib/config/uci.sh