[fsync] refactor the code and improve documentation
This commit is contained in:
Bart Van Der Meerssche
parent
7a40fe3c8d
commit
609cea6f22
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@ -28,16 +28,51 @@ local nixio = require 'nixio'
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nixio.fs = require 'nixio.fs'
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local uci = require 'luci.model.uci'.cursor()
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local CTRL_PATH = '/var/run/spid/ctrl'
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local CTRL_PATH_IN = CTRL_PATH .. '/in'
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local CTRL_PATH_OUT = CTRL_PATH .. '/out'
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local HW_CHECK_OVERRIDE = (arg[1] == '-f')
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local O_RDWR_NONBLOCK = nixio.open_flags('rdwr', 'nonblock')
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local O_RDWR_CREAT = nixio.open_flags('rdwr', 'creat')
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local POLLIN = nixio.poll_flags('in')
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local POLL_TIMEOUT_MS = 1000
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local MAX_TRIES = 5
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local CTRL_PATH = '/var/run/spid/ctrl'
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local CTRL_PATH_IN = CTRL_PATH .. '/in'
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local CTRL_PATH_OUT = CTRL_PATH .. '/out'
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local O_RDWR_NONBLOCK = nixio.open_flags('rdwr', 'nonblock')
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local O_RDWR_CREAT = nixio.open_flags('rdwr', 'creat')
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local POLLIN = nixio.poll_flags('in')
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local POLL_TIMEOUT_MS = 1000
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local MAX_TRIES = 5
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-- parse and load /etc/config/flukso
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local flukso = uci:get_all('flukso')
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local MAX_SENSORS = tonumber(flukso.main.max_sensors)
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local MAX_ANALOG_SENSORS = tonumber(flukso.main.max_analog_sensors)
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local RESET_COUNTERS = (flukso.main.reset_counters == '1')
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local SYNC_TO_SERVER = (flukso.daemon.enable_wan_branch == '1')
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local METERCONST_FACTOR = 0.449
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local GET_HW_VERSION = 'gh'
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local GET_HW_VERSION_R = '^gh%s+(%d+)%s+(%d+)$'
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local SET_ENABLE = 'se %d %d'
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local SET_PHY_TO_LOG = 'sp' -- with [1..MAX_SENSORS] arguments
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local SET_METERCONST = 'sm %d %d'
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local SET_COUNTER = 'sc %d %d'
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local COMMIT = 'ct'
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local API_PATH = '/www/sensor/'
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local CGI_SCRIPT = '/usr/bin/restful'
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local AVAHI_PATH = '/etc/avahi/services/flukso.service'
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--- Convert from Lua-style to c-style index.
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-- @param index Lua-style index startng at 1
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-- @return C-style index starting at 0
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local function toc(index)
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return index - 1
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end
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--- Log exit status to syslog first, then exit.
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-- @param code exit status code
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-- @return none
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local function exit(code)
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nixio.openlog('fsync', 'pid')
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@ -49,32 +84,49 @@ local function exit(code)
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level = 'err'
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end
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nixio.syslog(level, string.format('fync exited with code: %d', code))
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nixio.syslog(level, string.format('fsync exit status: %d', code))
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os.exit(code)
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end
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local ctrl = { fdin = nixio.open(CTRL_PATH_IN, O_RDWR_NONBLOCK),
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fdout = nixio.open(CTRL_PATH_OUT, O_RDWR_NONBLOCK),
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events = POLLIN,
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revents = 0 }
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--- Create a pair of file descriptors [fd] to the spid control fifo's.
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-- @return ctrl object containing the fd's, a line-based iterator and poll flags
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local function ctrl_init()
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local ctrl = { fdin = nixio.open(CTRL_PATH_IN, O_RDWR_NONBLOCK),
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fdout = nixio.open(CTRL_PATH_OUT, O_RDWR_NONBLOCK),
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events = POLLIN,
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revents = 0 }
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if ctrl.fdin == nil or ctrl.fdout == nil then
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print('Error. Unable to open the ctrl fifos.')
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print('Exiting...')
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exit(1)
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if ctrl.fdin == nil or ctrl.fdout == nil then
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print('Error. Unable to open the ctrl fifos.')
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print('Exiting...')
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exit(1)
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end
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-- acquire an exclusive lock on the ctrl fifos or exit
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if not (ctrl.fdin:lock('tlock') and ctrl.fdout:lock('tlock')) then
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print('Error. Detected a lock on one of the ctrl fifos.')
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print('Exiting...')
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exit(1)
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end
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ctrl.fd = ctrl.fdout -- need this entry for nixio.poll
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ctrl.line = ctrl.fdout:linesource()
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return ctrl
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end
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-- acquire an exclusive lock on the ctrl fifos or exit
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if not (ctrl.fdin:lock('tlock') and ctrl.fdout:lock('tlock')) then
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print('Error. Detected a lock on one of the ctrl fifos.')
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print('Exiting...')
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exit(1)
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--- Close the spid control fifo's.
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-- @param code ctrl object
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-- @return none
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local function ctrl_close(ctrl)
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ctrl.fdin:close()
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ctrl.fdout:close()
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end
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ctrl.fd = ctrl.fdout -- need this entry for nixio.poll
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ctrl.line = ctrl.fdout:linesource()
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--- Send a command to the control fifo.
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-- @param ctrl ctrl object
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-- @param cmd command to send
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-- @return none
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local function send(ctrl, cmd)
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while ctrl.line() do end -- flush the out fifo
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@ -112,119 +164,112 @@ local function send(ctrl, cmd)
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exit(2)
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end
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local function toc(num)
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return num - 1
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end
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--- Check the sensor board hardware version.
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-- @param ctrl ctrl object
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-- @return none
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local function check_hw_version(ctrl)
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local hw_major, hw_minor = send(ctrl, GET_HW_VERSION):match(GET_HW_VERSION_R)
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-- parse and load /etc/config/flukso
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local flukso = uci:get_all('flukso')
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local HW_CHECK_OVERRIDE = (arg[1] == '-f')
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local MAX_SENSORS = tonumber(flukso.main.max_sensors)
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local MAX_ANALOG_SENSORS = tonumber(flukso.main.max_analog_sensors)
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local METERCONST_FACTOR = 0.449
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local GET_HW_VERSION = 'gh'
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local GET_HW_VERSION_R = '^gh%s+(%d+)%s+(%d+)$'
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local SET_ENABLE = 'se %d %d'
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local SET_PHY_TO_LOG = 'sp' -- with [1..MAX_SENSORS] arguments
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local SET_METERCONST = 'sm %d %d'
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local SET_COUNTER = 'sc %d %d'
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local COMMIT = 'ct'
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local API_PATH = '/www/sensor/'
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local CGI_SCRIPT = '/usr/bin/restful'
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local AVAHI_PATH = '/etc/avahi/services/flukso.service'
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-- check hardware version
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local hw_major, hw_minor = send(ctrl, GET_HW_VERSION):match(GET_HW_VERSION_R)
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if hw_major ~= flukso.main.hw_major or hw_minor > flukso.main.hw_minor then
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print(string.format('Hardware check (major: %s, minor: %s) .. nok', hw_major, hw_minor))
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if hw_major ~= flukso.main.hw_major then
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print('Error. Major version does not match.')
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end
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if hw_minor > flukso.main.hw_minor then
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print('Error. Sensor board minor version is not supported by this package.')
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end
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if HW_CHECK_OVERRIDE then
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print('Overridden. Good luck!')
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else
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print('Use -f to override this check at your own peril.')
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exit(3)
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end
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else
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print(string.format('Hardware check (major: %s, minor: %s) .. ok', hw_major, hw_minor))
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end
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-- disable all ports
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for i = 1, MAX_SENSORS do
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local cmd = string.format(SET_ENABLE, toc(i), 0)
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send(ctrl, cmd)
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end
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-- populate phy_to_log
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local phy_to_log = {}
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for i = 1, MAX_SENSORS do
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if flukso[tostring(i)] ~= nil then
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if flukso[tostring(i)]['class'] == 'analog' and i > MAX_ANALOG_SENSORS then
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print(string.format('Error. Analog sensor %s should be less than or equal to max_analog_sensors (%s)', i, MAX_ANALOG_SENSORS))
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exit(4)
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if hw_major ~= flukso.main.hw_major or hw_minor > flukso.main.hw_minor then
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print(string.format('Hardware check (major: %s, minor: %s) .. nok', hw_major, hw_minor))
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if hw_major ~= flukso.main.hw_major then
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print('Error. Major version does not match.')
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end
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local ports = flukso[tostring(i)].port or {}
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if hw_minor > flukso.main.hw_minor then
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print('Error. Sensor board minor version is not supported by this package.')
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end
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for j = 1, #ports do
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if tonumber(ports[j]) > MAX_SENSORS then
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print(string.format('Error. Port numbering in sensor %s should be less than or equal to max_sensors (%s)', i, MAX_SENSORS))
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exit(5)
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if HW_CHECK_OVERRIDE then
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print('Overridden. Good luck!')
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else
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print('Use -f to override this check at your own peril.')
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exit(3)
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end
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else
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print(string.format('Hardware check (major: %s, minor: %s) .. ok', hw_major, hw_minor))
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end
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end
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else
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phy_to_log[toc(tonumber(ports[j]))] = toc(i)
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--- Disable all sensors in the sensor board.
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-- @param ctrl ctrl object
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-- @return none
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local function disable_all_sensors(ctrl)
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for i = 1, MAX_SENSORS do
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local cmd = string.format(SET_ENABLE, toc(i), 0)
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send(ctrl, cmd)
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end
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end
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--- Populate the physical (port) to logical (sensor) map on the sensor board.
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-- @param ctrl ctrl object
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-- @return none
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local function set_phy_to_log(ctrl)
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local phy_to_log = {}
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for i = 1, MAX_SENSORS do
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if flukso[tostring(i)] ~= nil then
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if flukso[tostring(i)]['class'] == 'analog' and i > MAX_ANALOG_SENSORS then
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print(string.format('Error. Analog sensor %s should be less than or equal to max_analog_sensors (%s)', i, MAX_ANALOG_SENSORS))
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exit(4)
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end
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local ports = flukso[tostring(i)].port or {}
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for j = 1, #ports do
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if tonumber(ports[j]) > MAX_SENSORS then
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print(string.format('Error. Port numbering in sensor %s should be less than or equal to max_sensors (%s)', i, MAX_SENSORS))
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exit(5)
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else
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phy_to_log[toc(tonumber(ports[j]))] = toc(i)
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end
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end
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end
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end
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-- ports that are not in use are mapped to sensor id 0xff
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for i = 0, MAX_SENSORS - 1 do
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if not phy_to_log[i] then
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phy_to_log[i] = 0xff
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end
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end
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local cmd = SET_PHY_TO_LOG .. ' ' .. table.concat(phy_to_log, ' ', 0)
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send(ctrl, cmd)
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end
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-- ports that are not in use are mapped to sensor id 0xff
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for i = 0, MAX_SENSORS - 1 do
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if not phy_to_log[i] then
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phy_to_log[i] = 0xff
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--- Populate each sensor's meterconstant on the sensor board.
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-- @param ctrl ctrl object
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-- @return none
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local function set_meterconst(ctrl)
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for i = 1, MAX_SENSORS do
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local cmd
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if flukso[tostring(i)] == nil then
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cmd = string.format(SET_METERCONST, toc(i), 0)
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elseif flukso[tostring(i)]['class'] == 'analog' then
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local voltage = tonumber(flukso[tostring(i)].voltage or "0")
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local current = tonumber(flukso[tostring(i)].current or "0")
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cmd = string.format(SET_METERCONST, toc(i), math.floor(METERCONST_FACTOR * voltage * current))
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elseif flukso[tostring(i)]['class'] == 'pulse'then
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local meterconst = tonumber(flukso[tostring(i)].constant or "0")
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cmd = string.format(SET_METERCONST, toc(i), meterconst)
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else
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cmd = string.format(SET_METERCONST, toc(i), 0)
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end
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if cmd then send(ctrl,cmd) end
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end
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end
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local cmd = SET_PHY_TO_LOG .. ' ' .. table.concat(phy_to_log, ' ', 0)
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send(ctrl, cmd)
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-- populate meterconst
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for i = 1, MAX_SENSORS do
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local cmd
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if flukso[tostring(i)] == nil then
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cmd = string.format(SET_METERCONST, toc(i), 0)
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elseif flukso[tostring(i)]['class'] == 'analog' then
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local voltage = tonumber(flukso[tostring(i)].voltage or "0")
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local current = tonumber(flukso[tostring(i)].current or "0")
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cmd = string.format(SET_METERCONST, toc(i), math.floor(METERCONST_FACTOR * voltage * current))
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elseif flukso[tostring(i)]['class'] == 'pulse'then
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local meterconst = tonumber(flukso[tostring(i)].constant or "0")
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cmd = string.format(SET_METERCONST, toc(i), meterconst)
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else
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cmd = string.format(SET_METERCONST, toc(i), 0)
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end
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if cmd then send(ctrl,cmd) end
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end
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-- populate counter if reset_counters is set
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if flukso.main.reset_counters == '1' then
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--- Reset each sensor's counter on the sensor board.
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-- @param ctrl ctrl object
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-- @return none
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local function reset_counters(ctrl)
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for i = 1, MAX_SENSORS do
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local cmd = string.format(SET_COUNTER, toc(i), 0)
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send(ctrl, cmd)
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@ -234,82 +279,133 @@ if flukso.main.reset_counters == '1' then
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uci:commit('flukso')
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end
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-- enable configured sensors
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for i = 1, MAX_SENSORS do
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if flukso[tostring(i)] ~= nil and flukso[tostring(i)].enable == '1' then
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cmd = string.format(SET_ENABLE, toc(i), 1)
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send(ctrl, cmd)
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end
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end
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-- commit changes
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send(ctrl, COMMIT)
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-- clean up ctrl port fd's
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ctrl.fdin:close()
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ctrl.fdout:close()
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-- make sure /www/sensor exists
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nixio.fs.mkdirr(API_PATH)
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-- clean up old symlinks
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for symlink in nixio.fs.dir(API_PATH) do
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nixio.fs.unlink(API_PATH .. symlink)
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end
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-- generate new symlinks
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for i = 1, MAX_SENSORS do
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if flukso[tostring(i)] ~= nil and flukso[tostring(i)].enable == '1' then
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local sensor_id = flukso[tostring(i)].id
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if sensor_id then
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nixio.fs.symlink(CGI_SCRIPT, API_PATH .. sensor_id)
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print(string.format('ln -s %s %s%s .. ok', CGI_SCRIPT, API_PATH, sensor_id))
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--- Activate the enabled sensors on the sensor board.
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-- @param ctrl ctrl object
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-- @return none
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local function enable_sensors(ctrl)
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for i = 1, MAX_SENSORS do
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if flukso[tostring(i)] ~= nil and flukso[tostring(i)].enable == '1' then
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cmd = string.format(SET_ENABLE, toc(i), 1)
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send(ctrl, cmd)
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end
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end
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end
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-- generate a new flukso.service for avahi
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avahi = { head = {}, body = {}, tail = {} }
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--- Commit all changes on the sensor board.
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-- @param ctrl ctrl object
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-- @return none
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local function commit(ctrl)
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send(ctrl, COMMIT)
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end
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avahi.head[1] = '<?xml version="1.0" standalone="no"?><!--*-nxml-*-->'
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avahi.head[2] = '<!DOCTYPE service-group SYSTEM "avahi-service.dtd">'
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avahi.head[3] = '<service-group>'
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avahi.head[4] = ' <name replace-wildcards="yes">Flukso RESTful API on %h</name>'
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avahi.head[5] = ' <service>'
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avahi.head[6] = ' <type>_flukso._tcp</type>'
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avahi.head[7] = ' <port>8080</port>'
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for i = 1, MAX_SENSORS do
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if flukso[tostring(i)] ~= nil and flukso[tostring(i)].enable == '1' and flukso[tostring(i)].id then
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avahi.body[#avahi.body + 1] = string.format(' <txt-record>id%d=%s</txt-record>' , i, flukso[tostring(i)].id)
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--- Map /sensor/xyz endpoints to the cgi script.
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-- @return none
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local function create_symlinks()
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-- make sure /www/sensor exists
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nixio.fs.mkdirr(API_PATH)
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-- clean up old symlinks
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for symlink in nixio.fs.dir(API_PATH) do
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nixio.fs.unlink(API_PATH .. symlink)
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end
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-- generate new symlinks
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for i = 1, MAX_SENSORS do
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if flukso[tostring(i)] ~= nil
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and flukso[tostring(i)].enable == '1'
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and flukso[tostring(i)].id
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and flukso[tostring(i)].class ~= 'uart'
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then
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local sensor_id = flukso[tostring(i)].id
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if sensor_id then
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nixio.fs.symlink(CGI_SCRIPT, API_PATH .. sensor_id)
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print(string.format('ln -s %s %s%s .. ok', CGI_SCRIPT, API_PATH, sensor_id))
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
avahi.tail[1] = ' <txt-record>path=/sensor</txt-record>'
|
||||
avahi.tail[2] = ' <txt-record>version=1.0</txt-record>'
|
||||
avahi.tail[3] = ' </service>'
|
||||
avahi.tail[4] = '</service-group>'
|
||||
--- Generate a new flukso.service xml file for the avahi-daemon.
|
||||
-- @return none
|
||||
local function create_avahi_config()
|
||||
avahi = { head = {}, body = {}, tail = {} }
|
||||
|
||||
-- remove the old flukso.service
|
||||
nixio.fs.unlink(AVAHI_PATH)
|
||||
avahi.head[1] = '<?xml version="1.0" standalone="no"?><!--*-nxml-*-->'
|
||||
avahi.head[2] = '<!DOCTYPE service-group SYSTEM "avahi-service.dtd">'
|
||||
avahi.head[3] = '<service-group>'
|
||||
avahi.head[4] = ' <name replace-wildcards="yes">Flukso RESTful API on %h</name>'
|
||||
avahi.head[5] = ' <service>'
|
||||
avahi.head[6] = ' <type>_flukso._tcp</type>'
|
||||
avahi.head[7] = ' <port>8080</port>'
|
||||
|
||||
-- generate the new one
|
||||
fd = nixio.open(AVAHI_PATH, O_RDWR_CREAT)
|
||||
print(string.format('generating a new %s', AVAHI_PATH))
|
||||
for i = 1, MAX_SENSORS do
|
||||
if flukso[tostring(i)] ~= nil
|
||||
and flukso[tostring(i)].enable == '1'
|
||||
and flukso[tostring(i)].id
|
||||
and flukso[tostring(i)].class ~= 'uart'
|
||||
then
|
||||
|
||||
for i = 1, #avahi.head do
|
||||
fd:write(avahi.head[i] .. '\n')
|
||||
avahi.body[#avahi.body + 1] = string.format(' <txt-record>id%d=%s</txt-record>' , i, flukso[tostring(i)].id)
|
||||
end
|
||||
end
|
||||
|
||||
avahi.tail[1] = ' <txt-record>path=/sensor</txt-record>'
|
||||
avahi.tail[2] = ' <txt-record>version=1.0</txt-record>'
|
||||
avahi.tail[3] = ' </service>'
|
||||
avahi.tail[4] = '</service-group>'
|
||||
|
||||
-- remove the old flukso.service
|
||||
nixio.fs.unlink(AVAHI_PATH)
|
||||
|
||||
-- generate the new one
|
||||
fd = nixio.open(AVAHI_PATH, O_RDWR_CREAT)
|
||||
print(string.format('generating a new %s', AVAHI_PATH))
|
||||
|
||||
for i = 1, #avahi.head do
|
||||
fd:write(avahi.head[i] .. '\n')
|
||||
end
|
||||
|
||||
for i = 1, #avahi.body do
|
||||
fd:write(avahi.body[i] .. '\n')
|
||||
end
|
||||
|
||||
for i = 1, #avahi.tail do
|
||||
fd:write(avahi.tail[i] .. '\n')
|
||||
end
|
||||
end
|
||||
|
||||
for i = 1, #avahi.body do
|
||||
fd:write(avahi.body[i] .. '\n')
|
||||
|
||||
-- sync config to sensor board
|
||||
local ctrl = ctrl_init()
|
||||
|
||||
check_hw_version(ctrl)
|
||||
disable_all_sensors(ctrl)
|
||||
set_phy_to_log(ctrl)
|
||||
set_meterconst(ctrl)
|
||||
|
||||
if RESET_COUNTERS then
|
||||
reset_counters(ctrl)
|
||||
end
|
||||
|
||||
for i = 1, #avahi.tail do
|
||||
fd:write(avahi.tail[i] .. '\n')
|
||||
enable_sensors(ctrl)
|
||||
commit(ctrl)
|
||||
|
||||
ctrl_close(ctrl)
|
||||
|
||||
|
||||
-- sync config locally
|
||||
create_symlinks()
|
||||
create_avahi_config()
|
||||
|
||||
|
||||
-- sync config to server
|
||||
if SYNC_TO_SERVER then
|
||||
-- TODO POST each sensor's parameters to the /sensor/xyz endpoint
|
||||
end
|
||||
|
||||
|
||||
print(arg[0] .. ' completed successfully. Bye!')
|
||||
exit(0)
|
||||
|
|
|
|||
Loading…
Reference in New Issue