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|watch)
 132                         _procd_add_array "$type" "$@"
 133                 ;;
 134                 error)
 135                         json_add_array "$type"
 136                         json_add_string "" "$@"
 137                         json_close_array
 138                 ;;
 139                 nice)
 140                         json_add_int "$type" "$1"
 141                 ;;
 142         esac
 143 }
 144
 145 _procd_add_interface_trigger() {
 146         json_add_array
 147         _procd_add_array_data "$1"
 148         shift
 149
 150         json_add_array
 151         _procd_add_array_data "if"
 152
 153         json_add_array
 154         _procd_add_array_data "eq" "interface" "$1"
 155         shift
 156         json_close_array
 157
 158         json_add_array
 159         _procd_add_array_data "run_script" "$@"
 160         json_close_array
 161
 162         json_close_array
 163
 164         json_close_array
 165 }
 166
 167 _procd_add_reload_interface_trigger() {
 168         local script=$(readlink "$initscript")
 169         local name=$(basename ${script:-$initscript})
 170
 171         _procd_open_trigger
 172         _procd_add_interface_trigger "interface.*" $1 /etc/init.d/$name reload
 173         _procd_close_trigger
 174 }
 175
 176 _procd_add_config_trigger() {
 177         json_add_array
 178         _procd_add_array_data "$1"
 179         shift
 180
 181         json_add_array
 182         _procd_add_array_data "if"
 183
 184         json_add_array
 185         _procd_add_array_data "eq" "package" "$1"
 186         shift
 187         json_close_array
 188
 189         json_add_array
 190         _procd_add_array_data "run_script" "$@"
 191         json_close_array
 192
 193         json_close_array
 194
 195         json_close_array
 196 }
 197
 198 _procd_add_reload_trigger() {
 199         local script=$(readlink "$initscript")
 200         local name=$(basename ${script:-$initscript})
 201         local file
 202
 203         _procd_open_trigger
 204         for file in "$@"; do
 205                 _procd_add_config_trigger "config.change" "$file" /etc/init.d/$name reload
 206         done
 207         _procd_close_trigger
 208 }
 209
 210 _procd_add_validation() {
 211         _procd_open_validate
 212         $@
 213         _procd_close_validate
 214 }
 215
 216 _procd_append_param() {
 217         local type="$1"; shift
 218         local _json_no_warning=1
 219
 220         json_select "$type"
 221         [ $? = 0 ] || {
 222                 _procd_set_param "$type" "$@"
 223                 return
 224         }
 225         case "$type" in
 226                 env|data|limits)
 227                         _procd_add_table_data "$@"
 228                 ;;
 229                 command|netdev|file|respawn|watch)
 230                         _procd_add_array_data "$@"
 231                 ;;
 232                 error)
 233                         json_add_string "" "$@"
 234                 ;;
 235         esac
 236         json_select ..
 237 }
 238
 239 _procd_close_instance() {
 240         json_close_object
 241 }
 242
 243 _procd_close_trigger() {
 244         json_close_array
 245 }
 246
 247 _procd_close_validate() {
 248         json_close_array
 249 }
 250
 251 _procd_add_instance() {
 252         _procd_open_instance
 253         _procd_set_param command "$@"
 254         _procd_close_instance
 255 }
 256
 257 _procd_kill() {
 258         local service="$1"
 259         local instance="$2"
 260
 261         json_init
 262         [ -n "$service" ] && json_add_string name "$service"
 263         [ -n "$instance" ] && json_add_string instance "$instance"
 264         _procd_ubus_call delete
 265 }
 266
 267 uci_validate_section()
 268 {
 269         local _package="$1"
 270         local _type="$2"
 271         local _name="$3"
 272         local _result
 273         local _error
 274         shift; shift; shift
 275         _result=`/sbin/validate_data "$_package" "$_type" "$_name" "$@" 2> /dev/null`
 276         _error=$?
 277         eval "$_result"
 278         [ "$_error" = "0" ] || `/sbin/validate_data "$_package" "$_type" "$_name" "$@" 1> /dev/null`
 279         return $_error
 280 }
 281
 282 _procd_wrapper \
 283         procd_open_service \
 284         procd_close_service \
 285         procd_add_instance \
 286         procd_add_config_trigger \
 287         procd_add_interface_trigger \
 288         procd_add_reload_trigger \
 289         procd_add_reload_interface_trigger \
 290         procd_add_interface_reload \
 291         procd_open_trigger \
 292         procd_close_trigger \
 293         procd_open_instance \
 294         procd_close_instance \
 295         procd_open_validate \
 296         procd_close_validate \
 297         procd_set_param \
 298         procd_append_param \
 299         procd_add_validation \
 300         procd_kill