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

   1 #!/bin/sh
   2 # Copyright (C) 2006 OpenWrt.org
   3 # Copyright (C) 2006 Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
   4
   5 alias debug=${DEBUG:-:}
   6
   7 # newline
   8 N="
   9 "
  10
  11 _C=0
  12
  13 hotplug_dev() {
  14         env -i ACTION=$1 INTERFACE=$2 /sbin/hotplug net
  15 }
  16
  17 append() {
  18         local var="$1"
  19         local value="$2"
  20         local sep="${3:- }"
  21
  22         eval "export -n -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
  23 }
  24
  25 reset_cb() {
  26         config_cb() { return 0; }
  27         option_cb() { return 0; }
  28 }
  29 reset_cb
  30
  31 config () {
  32         local cfgtype="$1"
  33         local name="$2"
  34
  35         CONFIG_NUM_SECTIONS=$(($CONFIG_NUM_SECTIONS + 1))
  36         name="${name:-cfg$CONFIG_NUM_SECTIONS}"
  37         append CONFIG_SECTIONS "$name"
  38         config_cb "$cfgtype" "$name"
  39         CONFIG_SECTION="$name"
  40         export -n "CONFIG_${CONFIG_SECTION}_TYPE=$cfgtype"
  41 }
  42
  43 option () {
  44         local varname="$1"; shift
  45         local value="$*"
  46
  47         export -n "CONFIG_${CONFIG_SECTION}_${varname}=$value"
  48         option_cb "$varname" "$*"
  49 }
  50
  51 config_rename() {
  52         local OLD="$1"
  53         local NEW="$2"
  54         local oldvar
  55         local newvar
  56
  57         [ "$OLD" -a "$NEW" ] || return
  58         for oldvar in `set | grep ^CONFIG_${OLD}_ | \
  59                 sed -e 's/\(.*\)=.*$/\1/'` ; do
  60                 newvar="CONFIG_${NEW}_${oldvar##CONFIG_${OLD}_}"
  61                 eval "export -n \"$newvar=\${$oldvar}\""
  62                 unset "$oldvar"
  63         done
  64         CONFIG_SECTIONS="$(echo " $CONFIG_SECTIONS " | sed -e "s, $OLD , $NEW ,")"
  65
  66         [ "$CONFIG_SECTION" = "$OLD" ] && CONFIG_SECTION="$NEW"
  67 }
  68
  69 config_unset() {
  70         config_set "$1" "$2" ""
  71 }
  72
  73 config_clear() {
  74         local SECTION="$1"
  75         local oldvar
  76
  77         CONFIG_SECTIONS="$(echo " $CONFIG_SECTIONS " | sed -e "s, $OLD , ,")"
  78         CONFIG_SECTIONS="${SECTION:+$CONFIG_SECTIONS}"
  79
  80         for oldvar in `set | grep ^CONFIG_${SECTION:+${SECTION}_} | \
  81                 sed -e 's/\(.*\)=.*$/\1/'` ; do
  82                 unset $oldvar
  83         done
  84 }
  85
  86 config_load() {
  87         local file="/etc/config/$1"
  88         _C=0
  89         CONFIG_SECTIONS=
  90         CONFIG_NUM_SECTIONS=0
  91         CONFIG_SECTION=
  92
  93         [ -e "$file" ] && {
  94                 . $file
  95         } || return 1
  96
  97         ${CONFIG_SECTION:+config_cb}
  98 }
  99
 100 config_get() {
 101         case "$3" in
 102                 "") eval "echo \"\${CONFIG_${1}_${2}}\"";;
 103                 *)  eval "export -n -- \"$1=\${CONFIG_${2}_${3}}\"";;
 104         esac
 105 }
 106
 107 config_set() {
 108         local section="$1"
 109         local option="$2"
 110         local value="$3"
 111         export -n "CONFIG_${section}_${option}=$value"
 112 }
 113
 114 config_foreach() {
 115         local function="$1"
 116         local section
 117
 118         [ -z "$CONFIG_SECTIONS" ] && return 0
 119         for section in ${CONFIG_SECTIONS}; do
 120                 eval "$function \"\$section\""
 121         done
 122 }
 123
 124 load_modules() {
 125         cd /etc/modules.d
 126         sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
 127 }
 128
 129 include() {
 130         local file
 131
 132         for file in $(ls $1/*.sh 2>/dev/null); do
 133                 . $file
 134         done
 135 }
 136
 137 find_mtd_part() {
 138         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
 139
 140         PART="${PART##mtd}"
 141         echo "${PART:+/dev/mtdblock/$PART}"
 142 }
 143
 144 strtok() { # <string> { <variable> [<separator>] ... }
 145         local tmp
 146         local val="$1"
 147         local count=0
 148
 149         shift
 150
 151         while [ $# -gt 1 ]; do
 152                 tmp="${val%%$2*}"
 153
 154                 [ "$tmp" = "$val" ] && break
 155
 156                 val="${val#$tmp$2}"
 157
 158                 export -n "$1=$tmp"; count=$((count+1))
 159                 shift 2
 160         done
 161
 162         if [ $# -gt 0 -a "$val" ]; then
 163                 export -n "$1=$val"; count=$((count+1))
 164         fi
 165
 166         return $count
 167 }