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

   1 #!/bin/sh
   2 alias debug=${DEBUG:-:}
   3
   4 # newline
   5 N="
   6 "
   7
   8 # valid interface?
   9 if_valid () (
  10   ifconfig "$1" >&- 2>&- ||
  11   [ "${1%%[0-9]}" = "br" ] ||
  12   { debug "# missing interface '$1' ignored"; false; }
  13 )
  14
  15 hotplug_dev() {
  16         env -i ACTION=$1 INTERFACE=$2 /sbin/hotplug net
  17 }
  18
  19 append() {
  20         local var="$1"
  21         local value="$2"
  22         local sep="${3:- }"
  23         eval "export ${var}=\"\${${var}:+\${${var}}${value:+$sep}}$value\""
  24 }
  25
  26 config_cb() {
  27         return 0
  28 }
  29 option_cb() {
  30         return 0
  31 }
  32
  33 config () {
  34         config_cb "$@"
  35         _C=$((${_C:-0} + 1))
  36         export CONFIG_SECTION="${2:-cfg${_C}}"
  37         export CONFIG_${CONFIG_SECTION}_TYPE="$1"
  38 }
  39
  40 option () {
  41         local varname="$1" ; shift
  42         export CONFIG_${CONFIG_SECTION}_${varname}="$*"
  43         option_cb "$varname" "$*"
  44 }
  45
  46 config_clear() {
  47         [ -z "$CONFIG_SECTION" ] && return
  48         for oldsetting in `set | grep ^CONFIG_${CONFIG_SECTION}_ | \
  49                 sed -e 's/\(.*\)=.*$/\1/'` ; do
  50                 unset $oldsetting
  51         done
  52         unset CONFIG_SECTION
  53 }
  54
  55 config_load() {
  56         local CD=""
  57         if [ \! -e "$1" -a -e "/etc/config/$1" ]; then
  58                 cd /etc/config && local CD=1
  59         fi
  60         [ -e "$1" ] && . $1
  61         ${CD:+cd - >/dev/null}
  62         ${CONFIG_SECTION:+config_cb}
  63 }
  64
  65 config_get() {
  66         case "$3" in
  67                 "") eval "echo \${CONFIG_${1}_${2}}";;
  68                 *) eval "$1=\"\${CONFIG_${2}_${3}}\"";;
  69         esac
  70 }
  71
  72 config_set() {
  73         export CONFIG_${1}_${2}="${3}"
  74 }
  75
  76 load_modules() {
  77         sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
  78 }