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git://git.openwrt.org/openwrt/openwrt.git
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6d76ec3872
Allow init scripts to trigger free-form actions by exposing procd_add_action_mount_trigger. Clean up mount trigger wrappers while at it to reduce code duplication. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
656 lines
14 KiB
Bash
656 lines
14 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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# respawn info: array with 3 values $fail_threshold $restart_timeout $max_fail
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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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# limits: resource limits (passed to the process)
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# user: $username to run service as
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# group: $groupname to run service as
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# pidfile: file name to write pid into
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# stdout: boolean whether to redirect commands stdout to syslog (default: 0)
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# stderr: boolean whether to redirect commands stderr to syslog (default: 0)
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# facility: syslog facility used when logging to syslog (default: daemon)
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#
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# No space separation is done for arrays/tables - use one function argument per command line argument
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#
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# procd_close_instance():
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# Complete the instance being prepared
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#
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# procd_running(service, [instance]):
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# Checks if service/instance is currently running
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#
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# procd_kill(service, [instance]):
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# Kill a service instance (or all instances)
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#
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# procd_send_signal(service, [instance], [signal])
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# Send a signal to a service instance (or all instances)
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#
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. "$IPKG_INSTROOT/usr/share/libubox/jshn.sh"
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PROCD_RELOAD_DELAY=1000
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_PROCD_SERVICE=
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procd_lock() {
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local basescript=$(readlink "$initscript")
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local service_name="$(basename ${basescript:-$initscript})"
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flock -n 1000 &> /dev/null
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if [ "$?" != "0" ]; then
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exec 1000>"$IPKG_INSTROOT/var/lock/procd_${service_name}.lock"
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flock 1000
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if [ "$?" != "0" ]; then
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logger "warning: procd flock for $service_name failed"
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fi
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fi
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}
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_procd_call() {
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local old_cb
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json_set_namespace procd old_cb
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"$@"
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json_set_namespace $old_cb
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}
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_procd_wrapper() {
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procd_lock
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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="$1"
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[ -n "$PROCD_DEBUG" ] && json_dump >&2
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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_open_trigger
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service_triggers
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_procd_close_trigger
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_procd_open_data
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service_data
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_procd_close_data
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_procd_ubus_call ${1:-set}
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}
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_procd_add_array_data() {
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while [ "$#" -gt 0 ]; 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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[ -n "$TRACE_SYSCALLS" ] && json_add_boolean trace "1"
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}
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_procd_open_trigger() {
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let '_procd_trigger_open = _procd_trigger_open + 1'
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[ "$_procd_trigger_open" -gt 1 ] && return
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json_add_array "triggers"
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}
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_procd_close_trigger() {
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let '_procd_trigger_open = _procd_trigger_open - 1'
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[ "$_procd_trigger_open" -lt 1 ] || return
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json_close_array
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}
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_procd_open_data() {
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let '_procd_data_open = _procd_data_open + 1'
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[ "$_procd_data_open" -gt 1 ] && return
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json_add_object "data"
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}
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_procd_close_data() {
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let '_procd_data_open = _procd_data_open - 1'
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[ "$_procd_data_open" -lt 1 ] || return
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json_close_object
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}
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_procd_open_validate() {
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json_select ..
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json_add_array "validate"
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}
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_procd_close_validate() {
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json_close_array
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json_select triggers
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}
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_procd_add_jail() {
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json_add_object "jail"
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json_add_string name "$1"
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shift
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for a in $@; do
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case $a in
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log) json_add_boolean "log" "1";;
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ubus) json_add_boolean "ubus" "1";;
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procfs) json_add_boolean "procfs" "1";;
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sysfs) json_add_boolean "sysfs" "1";;
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ronly) json_add_boolean "ronly" "1";;
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requirejail) json_add_boolean "requirejail" "1";;
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netns) json_add_boolean "netns" "1";;
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userns) json_add_boolean "userns" "1";;
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cgroupsns) json_add_boolean "cgroupsns" "1";;
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esac
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done
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json_add_object "mount"
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json_close_object
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json_close_object
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}
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_procd_add_jail_mount() {
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local _json_no_warning=1
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json_select "jail"
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[ $? = 0 ] || return
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json_select "mount"
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[ $? = 0 ] || {
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json_select ..
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return
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}
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for a in $@; do
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json_add_string "$a" "0"
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done
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json_select ..
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json_select ..
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}
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_procd_add_jail_mount_rw() {
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local _json_no_warning=1
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json_select "jail"
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[ $? = 0 ] || return
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json_select "mount"
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[ $? = 0 ] || {
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json_select ..
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return
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}
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for a in $@; do
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json_add_string "$a" "1"
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done
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json_select ..
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json_select ..
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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|limits)
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_procd_add_table "$type" "$@"
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;;
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command|netdev|file|respawn|watch|watchdog)
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_procd_add_array "$type" "$@"
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;;
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error)
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json_add_array "$type"
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json_add_string "" "$@"
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json_close_array
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;;
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nice|term_timeout)
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json_add_int "$type" "$1"
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;;
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reload_signal)
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json_add_int "$type" $(kill -l "$1")
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;;
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pidfile|user|group|seccomp|capabilities|facility|\
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extroot|overlaydir|tmpoverlaysize)
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json_add_string "$type" "$1"
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;;
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stdout|stderr|no_new_privs)
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json_add_boolean "$type" "$1"
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;;
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esac
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}
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_procd_add_timeout() {
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[ "$PROCD_RELOAD_DELAY" -gt 0 ] && json_add_int "" "$PROCD_RELOAD_DELAY"
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return 0
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}
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_procd_add_interface_trigger() {
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json_add_array
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_procd_add_array_data "$1"
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shift
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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" "interface" "$1"
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shift
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json_close_array
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json_add_array
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_procd_add_array_data "run_script" "$@"
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json_close_array
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json_close_array
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_procd_add_timeout
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json_close_array
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}
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_procd_add_reload_interface_trigger() {
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local script=$(readlink "$initscript")
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local name=$(basename ${script:-$initscript})
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_procd_open_trigger
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_procd_add_interface_trigger "interface.*" $1 /etc/init.d/$name reload
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_procd_close_trigger
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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 "$1"
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shift
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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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_procd_add_timeout
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json_close_array
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}
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_procd_add_mount_trigger() {
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json_add_array
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_procd_add_array_data "$1"
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local action="$2"
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local multi=0
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shift ; shift
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json_add_array
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_procd_add_array_data "if"
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if [ "$2" ]; then
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json_add_array
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_procd_add_array_data "or"
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multi=1
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fi
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while [ "$1" ]; do
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json_add_array
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_procd_add_array_data "eq" "target" "$1"
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shift
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json_close_array
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done
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[ $multi = 1 ] && json_close_array
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json_add_array
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_procd_add_array_data "run_script" /etc/init.d/$name $action
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json_close_array
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json_close_array
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_procd_add_timeout
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json_close_array
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}
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_procd_add_action_mount_trigger() {
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local action="$1"
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shift
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local mountpoints="$(procd_get_mountpoints "$@")"
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[ "${mountpoints//[[:space:]]}" ] || return 0
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local script=$(readlink "$initscript")
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local name=$(basename ${script:-$initscript})
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_procd_open_trigger
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_procd_add_mount_trigger mount.add $action "$mountpoints"
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_procd_close_trigger
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}
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procd_get_mountpoints() {
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(
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__procd_check_mount() {
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local cfg="$1"
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local path="${2%%/}/"
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local target
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config_get target "$cfg" target
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target="${target%%/}/"
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[ "$path" != "${path##$target}" ] && echo "${target%%/}"
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}
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local mpath
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config_load fstab
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for mpath in "$@"; do
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config_foreach __procd_check_mount mount "$mpath"
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done
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) | sort -u
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}
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_procd_add_restart_mount_trigger() {
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_procd_add_action_mount_trigger restart "$@"
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}
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_procd_add_reload_mount_trigger() {
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_procd_add_action_mount_trigger reload "$@"
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}
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_procd_add_raw_trigger() {
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json_add_array
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_procd_add_array_data "$1"
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shift
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local timeout=$1
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shift
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json_add_array
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json_add_array
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_procd_add_array_data "run_script" "$@"
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json_close_array
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json_close_array
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json_add_int "" "$timeout"
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json_close_array
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}
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_procd_add_reload_trigger() {
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local script=$(readlink "$initscript")
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local name=$(basename ${script:-$initscript})
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local file
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_procd_open_trigger
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for file in "$@"; do
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_procd_add_config_trigger "config.change" "$file" /etc/init.d/$name reload
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done
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_procd_close_trigger
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}
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_procd_add_validation() {
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_procd_open_validate
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$@
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_procd_close_validate
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}
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_procd_append_param() {
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local type="$1"; shift
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local _json_no_warning=1
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json_select "$type"
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[ $? = 0 ] || {
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_procd_set_param "$type" "$@"
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return
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}
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case "$type" in
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env|data|limits)
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_procd_add_table_data "$@"
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;;
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command|netdev|file|respawn|watch|watchdog)
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_procd_add_array_data "$@"
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;;
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error)
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json_add_string "" "$@"
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;;
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esac
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json_select ..
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}
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_procd_close_instance() {
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local respawn_vals
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_json_no_warning=1
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if json_select respawn ; then
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json_get_values respawn_vals
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if [ -z "$respawn_vals" ]; then
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local respawn_threshold=$(uci_get system.@service[0].respawn_threshold)
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local respawn_timeout=$(uci_get system.@service[0].respawn_timeout)
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local respawn_retry=$(uci_get system.@service[0].respawn_retry)
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_procd_add_array_data ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
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fi
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json_select ..
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fi
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json_close_object
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}
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_procd_add_instance() {
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_procd_open_instance
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_procd_set_param command "$@"
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_procd_close_instance
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}
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procd_running() {
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local service="$1"
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local instance="${2:-*}"
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[ "$instance" = "*" ] || instance="'$instance'"
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json_init
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json_add_string name "$service"
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local running=$(_procd_ubus_call list | jsonfilter -l 1 -e "@['$service'].instances[$instance].running")
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[ "$running" = "true" ]
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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 name "$service"
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[ -n "$instance" ] && json_add_string instance "$instance"
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_procd_ubus_call delete
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}
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_procd_send_signal() {
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local service="$1"
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local instance="$2"
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local signal="$3"
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case "$signal" in
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[A-Z]*) signal="$(kill -l "$signal" 2>/dev/null)" || return 1;;
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esac
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json_init
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json_add_string name "$service"
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[ -n "$instance" -a "$instance" != "*" ] && json_add_string instance "$instance"
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[ -n "$signal" ] && json_add_int signal "$signal"
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_procd_ubus_call signal
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}
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_procd_status() {
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local service="$1"
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local instance="$2"
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local data
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json_init
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[ -n "$service" ] && json_add_string name "$service"
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data=$(_procd_ubus_call list | jsonfilter -e '@["'"$service"'"]')
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[ -z "$data" ] && { echo "inactive"; return 3; }
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data=$(echo "$data" | jsonfilter -e '$.instances')
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if [ -z "$data" ]; then
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[ -z "$instance" ] && { echo "active with no instances"; return 0; }
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data="[]"
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fi
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[ -n "$instance" ] && instance="\"$instance\"" || instance='*'
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if [ -z "$(echo "$data" | jsonfilter -e '$['"$instance"']')" ]; then
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echo "unknown instance $instance"; return 4
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else
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echo "running"; return 0
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fi
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}
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procd_open_data() {
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local name="$1"
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json_set_namespace procd __procd_old_cb
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json_add_object data
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}
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procd_close_data() {
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json_close_object
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json_set_namespace $__procd_old_cb
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}
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_procd_set_config_changed() {
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local package="$1"
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|
json_init
|
|
json_add_string type config.change
|
|
json_add_object data
|
|
json_add_string package "$package"
|
|
json_close_object
|
|
|
|
ubus call service event "$(json_dump)"
|
|
}
|
|
|
|
procd_add_mdns_service() {
|
|
local service proto port
|
|
service=$1; shift
|
|
proto=$1; shift
|
|
port=$1; shift
|
|
json_add_object "${service}_$port"
|
|
json_add_string "service" "_$service._$proto.local"
|
|
json_add_int port "$port"
|
|
[ -n "$1" ] && {
|
|
json_add_array txt
|
|
for txt in "$@"; do json_add_string "" "$txt"; done
|
|
json_select ..
|
|
}
|
|
json_select ..
|
|
}
|
|
|
|
procd_add_mdns() {
|
|
procd_open_data
|
|
json_add_object "mdns"
|
|
procd_add_mdns_service "$@"
|
|
json_close_object
|
|
procd_close_data
|
|
}
|
|
|
|
uci_validate_section()
|
|
{
|
|
local _package="$1"
|
|
local _type="$2"
|
|
local _name="$3"
|
|
local _result
|
|
local _error
|
|
shift; shift; shift
|
|
_result=$(/sbin/validate_data "$_package" "$_type" "$_name" "$@" 2> /dev/null)
|
|
_error=$?
|
|
eval "$_result"
|
|
[ "$_error" = "0" ] || $(/sbin/validate_data "$_package" "$_type" "$_name" "$@" 1> /dev/null)
|
|
return $_error
|
|
}
|
|
|
|
uci_load_validate() {
|
|
local _package="$1"
|
|
local _type="$2"
|
|
local _name="$3"
|
|
local _function="$4"
|
|
local _option
|
|
local _result
|
|
shift; shift; shift; shift
|
|
for _option in "$@"; do
|
|
eval "local ${_option%%:*}"
|
|
done
|
|
uci_validate_section "$_package" "$_type" "$_name" "$@"
|
|
_result=$?
|
|
[ -n "$_function" ] || return $_result
|
|
eval "$_function \"\$_name\" \"\$_result\""
|
|
}
|
|
|
|
_procd_wrapper \
|
|
procd_open_service \
|
|
procd_close_service \
|
|
procd_add_instance \
|
|
procd_add_raw_trigger \
|
|
procd_add_config_trigger \
|
|
procd_add_interface_trigger \
|
|
procd_add_mount_trigger \
|
|
procd_add_reload_trigger \
|
|
procd_add_reload_interface_trigger \
|
|
procd_add_action_mount_trigger \
|
|
procd_add_reload_mount_trigger \
|
|
procd_add_restart_mount_trigger \
|
|
procd_open_trigger \
|
|
procd_close_trigger \
|
|
procd_open_instance \
|
|
procd_close_instance \
|
|
procd_open_validate \
|
|
procd_close_validate \
|
|
procd_add_jail \
|
|
procd_add_jail_mount \
|
|
procd_add_jail_mount_rw \
|
|
procd_set_param \
|
|
procd_append_param \
|
|
procd_add_validation \
|
|
procd_set_config_changed \
|
|
procd_kill \
|
|
procd_send_signal
|