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 include() {
 164         local file
 165
 166         for file in $(ls $1/*.sh 2>/dev/null); do
 167                 . $file
 168         done
 169 }
 170
 171 find_mtd_index() {
 172         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 173         local INDEX="${PART##mtd}"
 174
 175         echo ${INDEX}
 176 }
 177
 178 find_mtd_part() {
 179         local INDEX=$(find_mtd_index "$1")
 180         local PREFIX=/dev/mtdblock
 181
 182         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 183         echo "${INDEX:+$PREFIX$INDEX}"
 184 }
 185
 186 group_add() {
 187         local name="$1"
 188         local gid="$2"
 189         local rc
 190         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 191         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 192         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 193         rc=$?
 194         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 195         return $rc
 196 }
 197
 198 group_exists() {
 199         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 200 }
 201
 202 user_add() {
 203         local name="${1}"
 204         local uid="${2}"
 205         local gid="${3:-$2}"
 206         local desc="${4:-$1}"
 207         local home="${5:-/var/run/$1}"
 208         local shell="${6:-/bin/false}"
 209         local rc
 210         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 211         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 212         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 213         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 214         rc=$?
 215         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 216         return $rc
 217 }
 218
 219 user_exists() {
 220         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 221 }
 222
 223 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh