204 lines
3.6 KiB
Bash
204 lines
3.6 KiB
Bash
# procd API:
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#
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# procd_open_service(name, [script]):
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# Initialize a new procd command message containing a service with one or more instances
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#
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# procd_close_service()
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# Send the command message for the service
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#
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# procd_open_instance([name]):
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# Add an instance to the service described by the previous procd_open_service call
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#
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# procd_set_param(type, [value...])
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# Available types:
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# command: command line (array).
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# env: environment variable (passed to the process)
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# data: arbitrary name/value pairs for detecting config changes (table)
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# file: configuration files (array)
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# netdev: bound network device (detects ifindex changes)
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#
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# No space separation is done for arrays/tables - use one function argument per command line argument
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#
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# procd_close_instance():
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# Complete the instance being prepared
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#
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# procd_kill(service, [instance]):
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# Kill a service instance (or all instances)
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#
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. $IPKG_INSTROOT/usr/share/libubox/jshn.sh
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_PROCD_SERVICE=
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_procd_call() {
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local old_cb
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json_set_namespace procd old_cb
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"$@"
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json_set_namespace $old_cb
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}
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_procd_wrapper() {
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while [ -n "$1" ]; do
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eval "$1() { _procd_call _$1 \"\$@\"; }"
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shift
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done
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}
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_procd_ubus_call() {
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local cmd="$1"
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ubus call service "$cmd" "$(json_dump)"
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json_cleanup
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}
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_procd_open_service() {
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local name="$1"
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local script="$2"
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_PROCD_SERVICE="$name"
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_PROCD_INSTANCE_SEQ=0
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json_init
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json_add_string name "$name"
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[ -n "$script" ] && json_add_string script "$script"
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json_add_object instances
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}
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_procd_close_service() {
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json_close_object
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_procd_ubus_call set
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}
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_procd_add_array_data() {
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while [ -n "$1" ]; do
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json_add_string "" "$1"
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shift
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done
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}
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_procd_add_array() {
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json_add_array "$1"
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shift
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_procd_add_array_data "$@"
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json_close_array
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}
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_procd_add_table_data() {
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while [ -n "$1" ]; do
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local var="${1%%=*}"
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local val="${1#*=}"
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[[ "$1" == "$val" ]] && val=
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json_add_string "$var" "$val"
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shift
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done
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}
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_procd_add_table() {
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json_add_object "$1"
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shift
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_procd_add_table_data "$@"
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json_close_object
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}
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_procd_open_instance() {
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local name="$1"; shift
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_PROCD_INSTANCE_SEQ="$(($_PROCD_INSTANCE_SEQ + 1))"
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name="${name:-instance$_PROCD_INSTANCE_SEQ}"
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json_add_object "$name"
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}
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_procd_open_trigger() {
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json_add_array "triggers"
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}
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_procd_set_param() {
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local type="$1"; shift
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case "$type" in
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env|data)
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_procd_add_table "$type" "$@"
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;;
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command|netdev|file)
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_procd_add_array "$type" "$@"
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;;
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nice)
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json_add_int "$type" "$1"
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;;
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esac
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}
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_procd_add_config_trigger() {
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json_add_array
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_procd_add_array_data "config.change"
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json_add_array
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_procd_add_array_data "if"
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json_add_array
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_procd_add_array_data "eq" "package" "$1"
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shift
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json_close_array
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json_add_array
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_procd_add_array_data "run_script" "$@"
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json_close_array
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json_close_array
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json_close_array
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}
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_procd_append_param() {
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local type="$1"; shift
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json_select "$type"
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case "$type" in
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env|data)
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_procd_add_table_data "$@"
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;;
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command|netdev|file)
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_procd_add_array_data "$@"
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;;
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esac
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json_select ..
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}
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_procd_close_instance() {
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json_close_object
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}
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_procd_close_trigger() {
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json_close_array
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}
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_procd_add_instance() {
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_procd_open_instance
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_procd_set_command "$@"
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_procd_close_instance
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}
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_procd_kill() {
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local service="$1"
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local instance="$2"
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json_init
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[ -n "$service" ] && json_add_string service "$service"
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[ -n "$instance" ] && json_add_string instance "$instance"
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_procd_ubus_call delete
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}
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_procd_wrapper \
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procd_open_service \
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procd_close_service \
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procd_add_instance \
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procd_add_config_trigger \
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procd_open_trigger \
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procd_close_trigger \
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procd_open_instance \
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procd_close_instance \
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procd_set_param \
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procd_append_param \
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procd_kill
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