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

   1 #!/bin/sh
   2 # Copyright (C) 2006-2013 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 append() {
  21         local var="$1"
  22         local value="$2"
  23         local sep="${3:- }"
  24
  25         eval "export ${NO_EXPORT:+-n} -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
  26 }
  27
  28 list_contains() {
  29         local var="$1"
  30         local str="$2"
  31         local val
  32
  33         eval "val=\" \${$var} \""
  34         [ "${val%% $str *}" != "$val" ]
  35 }
  36
  37 config_load() {
  38         [ -n "$IPKG_INSTROOT" ] && return 0
  39         uci_load "$@"
  40 }
  41
  42 reset_cb() {
  43         config_cb() { return 0; }
  44         option_cb() { return 0; }
  45         list_cb() { return 0; }
  46 }
  47 reset_cb
  48
  49 package() {
  50         return 0
  51 }
  52
  53 config () {
  54         local cfgtype="$1"
  55         local name="$2"
  56
  57         export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$(($CONFIG_NUM_SECTIONS + 1))
  58         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
  59         append CONFIG_SECTIONS "$name"
  60         [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
  61         export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
  62         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_TYPE=$cfgtype"
  63 }
  64
  65 option () {
  66         local varname="$1"; shift
  67         local value="$*"
  68
  69         export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_${varname}=$value"
  70         [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
  71 }
  72
  73 list() {
  74         local varname="$1"; shift
  75         local value="$*"
  76         local len
  77
  78         config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
  79         [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
  80         len=$(($len + 1))
  81         config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
  82         config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
  83         append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
  84         list_cb "$varname" "$*"
  85 }
  86
  87 config_unset() {
  88         config_set "$1" "$2" ""
  89 }
  90
  91 # config_get <variable> <section> <option> [<default>]
  92 # config_get <section> <option>
  93 config_get() {
  94         case "$3" in
  95                 "") eval echo "\${CONFIG_${1}_${2}:-\${4}}";;
  96                 *)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
  97         esac
  98 }
  99
 100 # config_get_bool <variable> <section> <option> [<default>]
 101 config_get_bool() {
 102         local _tmp
 103         config_get _tmp "$2" "$3" "$4"
 104         case "$_tmp" in
 105                 1|on|true|yes|enabled) _tmp=1;;
 106                 0|off|false|no|disabled) _tmp=0;;
 107                 *) _tmp="$4";;
 108         esac
 109         export ${NO_EXPORT:+-n} "$1=$_tmp"
 110 }
 111
 112 config_set() {
 113         local section="$1"
 114         local option="$2"
 115         local value="$3"
 116         local old_section="$CONFIG_SECTION"
 117
 118         CONFIG_SECTION="$section"
 119         option "$option" "$value"
 120         CONFIG_SECTION="$old_section"
 121 }
 122
 123 config_foreach() {
 124         local ___function="$1"
 125         [ "$#" -ge 1 ] && shift
 126         local ___type="$1"
 127         [ "$#" -ge 1 ] && shift
 128         local section cfgtype
 129
 130         [ -z "$CONFIG_SECTIONS" ] && return 0
 131         for section in ${CONFIG_SECTIONS}; do
 132                 config_get cfgtype "$section" TYPE
 133                 [ -n "$___type" -a "x$cfgtype" != "x$___type" ] && continue
 134                 eval "$___function \"\$section\" \"\$@\""
 135         done
 136 }
 137
 138 config_list_foreach() {
 139         [ "$#" -ge 3 ] || return 0
 140         local section="$1"; shift
 141         local option="$1"; shift
 142         local function="$1"; shift
 143         local val
 144         local len
 145         local c=1
 146
 147         config_get len "${section}" "${option}_LENGTH"
 148         [ -z "$len" ] && return 0
 149         while [ $c -le "$len" ]; do
 150                 config_get val "${section}" "${option}_ITEM$c"
 151                 eval "$function \"\$val\" \"\$@\""
 152                 c="$(($c + 1))"
 153         done
 154 }
 155
 156 insert_modules() {
 157         [ -d /etc/modules.d ] && {
 158                 cd /etc/modules.d
 159                 sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
 160         }
 161 }
 162
 163 default_prerm() {
 164         local name
 165         name=$(echo $(basename $1) | cut -d. -f1)
 166         [ -f /usr/lib/opkg/info/${name}.prerm-pkg ] && . /usr/lib/opkg/info/${name}.prerm-pkg
 167         for i in `cat /usr/lib/opkg/info/${name}.list | grep "^/etc/init.d/"`; do
 168                 $i disable
 169                 $i stop
 170         done
 171 }
 172
 173 default_postinst() {
 174         local name rusers
 175         name=$(echo $(basename $1) | cut -d. -f1)
 176         [ -f ${IPKG_INSTROOT}/usr/lib/opkg/info/${name}.postinst-pkg ] && . ${IPKG_INSTROOT}/usr/lib/opkg/info/${name}.postinst-pkg
 177         rusers=$(grep "Require-User:" ${IPKG_INSTROOT}/usr/lib/opkg/info/${name}.control)
 178         [ -n "$rusers" ] && {
 179                 local user group
 180                 for a in $(echo $rusers | sed "s/Require-User://g"); do
 181                         user=""
 182                         group=""
 183                         for b in $(echo $a | sed "s/:/ /g"); do
 184                                 [ -z "$user" ] && {
 185                                         user=$b
 186                                         continue
 187                                 }
 188                                 [ -z "$group" ] && {
 189                                         group=$b
 190                                         group_add_next $b
 191                                         gid=$?
 192                                         user_exists $user || user_add $user "" $gid
 193                                         continue
 194                                 }
 195                                 group_add_next $b
 196                                 group_add_user $b $user
 197                         done
 198                 done
 199         }
 200         [ -n "${IPKG_INSTROOT}" -o "$PKG_UPGRADE" = "1" ] || for i in `cat /usr/lib/opkg/info/${name}.list | grep "^/etc/init.d/"`; do
 201                 $i enable
 202                 $i start
 203         done
 204         return 0
 205 }
 206
 207 include() {
 208         local file
 209
 210         for file in $(ls $1/*.sh 2>/dev/null); do
 211                 . $file
 212         done
 213 }
 214
 215 find_mtd_index() {
 216         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 217         local INDEX="${PART##mtd}"
 218
 219         echo ${INDEX}
 220 }
 221
 222 find_mtd_part() {
 223         local INDEX=$(find_mtd_index "$1")
 224         local PREFIX=/dev/mtdblock
 225
 226         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 227         echo "${INDEX:+$PREFIX$INDEX}"
 228 }
 229
 230 group_add() {
 231         local name="$1"
 232         local gid="$2"
 233         local rc
 234         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 235         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 236         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 237         rc=$?
 238         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 239         return $rc
 240 }
 241
 242 group_exists() {
 243         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 244 }
 245
 246 group_add_next() {
 247         local gid gids
 248         gid=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
 249         [ -n "$gid" ] && return $gid
 250         gids=$(cat ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
 251         gid=100
 252         while [ -n "$(echo $gids | grep $gid)" ] ; do
 253                 gid=$((gid + 1))
 254         done
 255         group_add $1 $gid
 256         return $gid
 257 }
 258
 259 group_add_user() {
 260         local grp delim=","
 261         grp=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group)
 262         [ -z "$(echo $grp | cut -d: -f4 | grep $2)" ] || return
 263         [ -n "$(echo $grp | grep ":$")" ] && delim=""
 264         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 265         sed -i "s/$grp/$grp$delim$2/g" ${IPKG_INSTROOT}/etc/group
 266         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 267 }
 268
 269 user_add() {
 270         local name="${1}"
 271         local uid="${2}"
 272         local gid="${3}"
 273         local desc="${4:-$1}"
 274         local home="${5:-/var/run/$1}"
 275         local shell="${6:-/bin/false}"
 276         local rc
 277         [ -z "$uid" ] && {
 278                 uids=$(cat ${IPKG_INSTROOT}/etc/passwd | cut -d: -f3)
 279                 uid=100
 280                 while [ -n "$(echo $uids | grep $uid)" ] ; do
 281                         uid=$((uid + 1))
 282                 done
 283         }
 284         [ -z "$gid" ] && gid=$uid
 285         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 286         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 287         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 288         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 289         rc=$?
 290         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 291         return $rc
 292 }
 293
 294 user_exists() {
 295         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 296 }
 297
 298 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh