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_rename() {
  88         local OLD="$1"
  89         local NEW="$2"
  90         local oldvar
  91         local newvar
  92
  93         [ -n "$OLD" -a -n "$NEW" ] || return
  94         for oldvar in `set | grep ^CONFIG_${OLD}_ | \
  95                 sed -e 's/\(.*\)=.*$/\1/'` ; do
  96                 newvar="CONFIG_${NEW}_${oldvar##CONFIG_${OLD}_}"
  97                 eval "export ${NO_EXPORT:+-n} \"$newvar=\${$oldvar}\""
  98                 unset "$oldvar"
  99         done
 100         export ${NO_EXPORT:+-n} CONFIG_SECTIONS="$(echo " $CONFIG_SECTIONS " | sed -e "s, $OLD , $NEW ,")"
 101
 102         [ "$CONFIG_SECTION" = "$OLD" ] && export ${NO_EXPORT:+-n} CONFIG_SECTION="$NEW"
 103 }
 104
 105 config_unset() {
 106         config_set "$1" "$2" ""
 107 }
 108
 109 # config_get <variable> <section> <option> [<default>]
 110 # config_get <section> <option>
 111 config_get() {
 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
 118 # config_get_bool <variable> <section> <option> [<default>]
 119 config_get_bool() {
 120         local _tmp
 121         config_get _tmp "$2" "$3" "$4"
 122         case "$_tmp" in
 123                 1|on|true|enabled) _tmp=1;;
 124                 0|off|false|disabled) _tmp=0;;
 125                 *) _tmp="$4";;
 126         esac
 127         export ${NO_EXPORT:+-n} "$1=$_tmp"
 128 }
 129
 130 config_set() {
 131         local section="$1"
 132         local option="$2"
 133         local value="$3"
 134         local old_section="$CONFIG_SECTION"
 135
 136         CONFIG_SECTION="$section"
 137         option "$option" "$value"
 138         CONFIG_SECTION="$old_section"
 139 }
 140
 141 config_foreach() {
 142         local ___function="$1"
 143         [ "$#" -ge 1 ] && shift
 144         local ___type="$1"
 145         [ "$#" -ge 1 ] && shift
 146         local section cfgtype
 147
 148         [ -z "$CONFIG_SECTIONS" ] && return 0
 149         for section in ${CONFIG_SECTIONS}; do
 150                 config_get cfgtype "$section" TYPE
 151                 [ -n "$___type" -a "x$cfgtype" != "x$___type" ] && continue
 152                 eval "$___function \"\$section\" \"\$@\""
 153         done
 154 }
 155
 156 config_list_foreach() {
 157         [ "$#" -ge 3 ] || return 0
 158         local section="$1"; shift
 159         local option="$1"; shift
 160         local function="$1"; shift
 161         local val
 162         local len
 163         local c=1
 164
 165         config_get len "${section}" "${option}_LENGTH"
 166         [ -z "$len" ] && return 0
 167         while [ $c -le "$len" ]; do
 168                 config_get val "${section}" "${option}_ITEM$c"
 169                 eval "$function \"\$val\" \"\$@\""
 170                 c="$(($c + 1))"
 171         done
 172 }
 173
 174 insert_modules() {
 175         [ -d /etc/modules.d ] && {
 176                 cd /etc/modules.d
 177                 sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
 178         }
 179 }
 180
 181 include() {
 182         local file
 183
 184         for file in $(ls $1/*.sh 2>/dev/null); do
 185                 . $file
 186         done
 187 }
 188
 189 find_mtd_part() {
 190         local INDEX=$(find_mtd_index "$1")
 191         local PREFIX=/dev/mtdblock
 192
 193         [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
 194         echo "${INDEX:+$PREFIX$INDEX}"
 195 }
 196
 197 group_add() {
 198         local name="$1"
 199         local gid="$2"
 200         local rc
 201         [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
 202         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
 203         echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
 204         rc=$?
 205         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
 206         return $rc
 207 }
 208
 209 group_exists() {
 210         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
 211 }
 212
 213 user_add() {
 214         local name="${1}"
 215         local uid="${2}"
 216         local gid="${3:-$2}"
 217         local desc="${4:-$1}"
 218         local home="${5:-/var/run/$1}"
 219         local shell="${6:-/bin/false}"
 220         local rc
 221         [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
 222         [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 223         echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
 224         echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
 225         rc=$?
 226         [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 227         return $rc
 228 }
 229
 230 user_exists() {
 231         grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 232 }
 233
 234 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh