package/system/procd/files/procd.sh

   1 # procd API:
   2 #
   3 # procd_open_service(name, [script]):
   4 #   Initialize a new procd command message containing a service with one or more instances
   5 #
   6 # procd_close_service()
   7 #   Send the command message for the service
   8 #
   9 # procd_open_instance([name]):
  10 #   Add an instance to the service described by the previous procd_open_service call
  11 #
  12 # procd_set_param(type, [value...])
  13 #   Available types:
  14 #     command: command line (array).
  15 #     respawn info: array with 3 values $restart_timeout $fail_hreshold $max_fail
  16 #     env: environment variable (passed to the process)
  17 #     data: arbitrary name/value pairs for detecting config changes (table)
  18 #     file: configuration files (array)
  19 #     netdev: bound network device (detects ifindex changes)
  20 #     limits: resource limits (passed to the process)
  21 #
  22 #   No space separation is done for arrays/tables - use one function argument per command line argument
  23 #
  24 # procd_close_instance():
  25 #   Complete the instance being prepared
  26 #
  27 # procd_kill(service, [instance]):
  28 #   Kill a service instance (or all instances)
  29 #
  30
  31 . $IPKG_INSTROOT/usr/share/libubox/jshn.sh
  32
  33 _PROCD_SERVICE=
  34
  35 _procd_call() {
  36         local old_cb
  37
  38         json_set_namespace procd old_cb
  39         "$@"
  40         json_set_namespace $old_cb
  41 }
  42
  43 _procd_wrapper() {
  44         while [ -n "$1" ]; do
  45                 eval "$1() { _procd_call _$1 \"\$@\"; }"
  46                 shift
  47         done
  48 }
  49
  50 _procd_ubus_call() {
  51         local cmd="$1"
  52
  53         [ -n "$PROCD_DEBUG" ] && json_dump >&2
  54         ubus call service "$cmd" "$(json_dump)"
  55         json_cleanup
  56 }
  57
  58 _procd_open_service() {
  59         local name="$1"
  60         local script="$2"
  61
  62         _PROCD_SERVICE="$name"
  63         _PROCD_INSTANCE_SEQ=0
  64
  65         json_init
  66         json_add_string name "$name"
  67         [ -n "$script" ] && json_add_string script "$script"
  68         json_add_object instances
  69 }
  70
  71 _procd_close_service() {
  72         json_close_object
  73         service_triggers
  74         _procd_ubus_call set
  75 }
  76
  77 _procd_add_array_data() {
  78         while [ -n "$1" ]; do
  79                 json_add_string "" "$1"
  80                 shift
  81         done
  82 }
  83
  84 _procd_add_array() {
  85         json_add_array "$1"
  86         shift
  87         _procd_add_array_data "$@"
  88         json_close_array
  89 }
  90
  91 _procd_add_table_data() {
  92         while [ -n "$1" ]; do
  93                 local var="${1%%=*}"
  94                 local val="${1#*=}"
  95                 [[ "$1" == "$val" ]] && val=
  96                 json_add_string "$var" "$val"
  97                 shift
  98         done
  99 }
 100
 101 _procd_add_table() {
 102         json_add_object "$1"
 103         shift
 104         _procd_add_table_data "$@"
 105         json_close_object
 106 }
 107
 108 _procd_open_instance() {
 109         local name="$1"; shift
 110
 111         _PROCD_INSTANCE_SEQ="$(($_PROCD_INSTANCE_SEQ + 1))"
 112         name="${name:-instance$_PROCD_INSTANCE_SEQ}"
 113         json_add_object "$name"
 114 }
 115
 116 _procd_open_trigger() {
 117         json_add_array "triggers"
 118 }
 119
 120 _procd_open_validate() {
 121         json_add_array "validate"
 122 }
 123
 124 _procd_set_param() {
 125         local type="$1"; shift
 126
 127         case "$type" in
 128                 env|data|limits)
 129                         _procd_add_table "$type" "$@"
 130                 ;;
 131                 command|netdev|file|respawn)
 132                         _procd_add_array "$type" "$@"
 133                 ;;
 134                 nice)
 135                         json_add_int "$type" "$1"
 136                 ;;
 137         esac
 138 }
 139
 140 _procd_add_config_trigger() {
 141         json_add_array
 142         _procd_add_array_data "$1"
 143         shift
 144
 145         json_add_array
 146         _procd_add_array_data "if"
 147
 148         json_add_array
 149         _procd_add_array_data "eq" "package" "$1"
 150         shift
 151         json_close_array
 152
 153         json_add_array
 154         _procd_add_array_data "run_script" "$@"
 155         json_close_array
 156
 157         json_close_array
 158
 159         json_close_array
 160 }
 161
 162 _procd_add_reload_trigger() {
 163         local script=$(readlink "$initscript")
 164         local name=$(basename ${script:-$initscript})
 165
 166         _procd_open_trigger
 167         _procd_add_config_trigger "config.change" $1 /etc/init.d/$name reload
 168         _procd_close_trigger
 169 }
 170
 171 _procd_add_validation() {
 172         _procd_open_validate
 173         $@
 174         _procd_close_validate
 175 }
 176
 177 _procd_append_param() {
 178         local type="$1"; shift
 179
 180         json_select "$type"
 181         case "$type" in
 182                 env|data|limits)
 183                         _procd_add_table_data "$@"
 184                 ;;
 185                 command|netdev|file|respawn)
 186                         _procd_add_array_data "$@"
 187                 ;;
 188         esac
 189         json_select ..
 190 }
 191
 192 _procd_close_instance() {
 193         json_close_object
 194 }
 195
 196 _procd_close_trigger() {
 197         json_close_array
 198 }
 199
 200 _procd_close_validate() {
 201         json_close_array
 202 }
 203
 204 _procd_add_instance() {
 205         _procd_open_instance
 206         _procd_set_param command "$@"
 207         _procd_close_instance
 208 }
 209
 210 _procd_kill() {
 211         local service="$1"
 212         local instance="$2"
 213
 214         json_init
 215         [ -n "$service" ] && json_add_string name "$service"
 216         [ -n "$instance" ] && json_add_string instance "$instance"
 217         _procd_ubus_call delete
 218 }
 219
 220 uci_validate_section()
 221 {
 222         local package="$1"
 223         local type="$2"
 224         local name="$3"
 225         local error
 226         shift; shift; shift
 227         local result=`/sbin/validate_data "$package" "$type" "$name" "$@" 2> /dev/null`
 228         error=$?
 229         eval "$result"
 230         [ "$error" = "0" ] || `/sbin/validate_data "$package" "$type" "$name" "$@" 1> /dev/null`
 231         return $error
 232 }
 233
 234 _procd_wrapper \
 235         procd_open_service \
 236         procd_close_service \
 237         procd_add_instance \
 238         procd_add_config_trigger \
 239         procd_add_reload_trigger \
 240         procd_open_trigger \
 241         procd_close_trigger \
 242         procd_open_instance \
 243         procd_close_instance \
 244         procd_open_validate \
 245         procd_close_validate \
 246         procd_set_param \
 247         procd_append_param \
 248         procd_add_validation \
 249         procd_kill