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module(..., package.seeall)
require("fs")
require("procps")
require("getopts")
require("format")
require("daemoncontrol")
require("validator")
local configfile = "/etc/conf.d/syslog"
local processname = "syslog"
local config = {}
local function get_version()
local cmd = "/sbin/apk_version -v -s busybox | cut -d ' ' -f 1"
local cmd_output = io.popen( cmd )
local cmd_output_result = cmd_output:read("*a") or ""
cmd_output:close()
return cmd_output_result
end
local function getloglevels()
local loglevels = {}
for i=1,8 do
table.insert(loglevels,i)
end
return loglevels
end
-- ################################################################################
-- PUBLIC FUNCTIONS
-- action should be a CFE
function startstop_service ( self, action )
local cmd = action.value
local cmdresult,cmdmessage,cmderror,cmdaction = daemoncontrol.daemoncontrol(processname, cmd)
action.descr=cmdmessage
action.errtxt=cmderror
-- Reporting back (true|false, the original acition)
return cmdresult,action
end
function getstatus()
local opts = getconfig()
local status = {}
status.version = cfe({ name = "version",
label="Program version",
value=get_version(),
})
status.status = cfe({ name="status",
label="Program status",
value=procps.pidof("syslogd"),
})
if (opts["remotelogging"]) and not ((opts["remotelogging"]["value"] ~= "") and not (opts["localandnetworklog"]["value"])) then
status.logfile = cfe({ name="logfile",
label="Locally logging to",
value=opts["logfile"]["value"],
})
end
if (opts["SYSLOGD_OPTS"]) and (opts["SYSLOGD_OPTS"]["-R"]) and (opts["SYSLOGD_OPTS"]["-R"] ~= "") then
status.remote = cfe({ name="remotelogging",
label="Remote logging to",
value=opts["SYSLOGD_OPTS"]["-R"],
})
end
return status
end
function get_filedetails()
local path = configfile
local filedetails = fs.stat(path)
local config = getconfig(path)
local file = {}
file["filename"] = cfe({
name="filename",
label="File name",
value=path,
})
file["filesize"] = cfe({
name="filesize",
label="File size",
value=filedetails.size or 0,
})
file["mtime"] = cfe({
name="mtime",
label="File date",
value=filedetails.mtime or "---",
})
file["filecontent"] = cfe({
type="longtext",
name="filecontent",
label="File content",
value=fs.read_file(path),
})
file["sumerrors"] = config.sumerrors
return file
end
function getconfig()
local config = {}
if (fs.is_file(configfile)) then
configcontent = getopts.getoptsfromfile(configfile) or config
if (type(config["SYSLOGD_OPTS"]) == "string") then
config["SYSLOGD_OPTS"] = {}
end
else
config["configfile"] = "Config file '".. configfile .. "' is missing!"
end
-- Next section selects which configurations we should show to the user
config["logfile"] = cfe({
name="logfile",
label = "Log to given file",
value = configcontent["SYSLOGD_OPTS"]["-O"] or "/var/log/messages",
})
config["loglevel"] = cfe({
name="loglevel",
label = "Set local log level",
value = tonumber(configcontent["SYSLOGD_OPTS"]["-l"]) or 8,
type = "select",
option = getloglevels(),
descr = "1=Quiet, ... , " .. table.maxn(getloglevels()) .. "=Debug",
})
config["smallerlogs"] = cfe({
name="smallerlogs",
label = "Smaller logging output",
checked = configcontent["SYSLOGD_OPTS"]["-S"],
value = "smallerlogs",
type = "checkbox",
})
config["maxsize"] = cfe ({
name="maxsize",
label = "Max size (KB) before rotate",
descr = "Default=200KB, 0=off",
value = configcontent["SYSLOGD_OPTS"]["-s"],
})
config["numrotate"] = cfe ({ name="numrotate",
label = "Number of rotated logs to keep",
descr = "Default=1, max=99, 0=purge",
value = configcontent["SYSLOGD_OPTS"]["-b"],
})
config["localandnetworklog"] = cfe ({
name="localandnetworklog",
label = "Log locally and via network",
checked = configcontent["SYSLOGD_OPTS"]["-L"],
value = "localandnetworklog",
type = "checkbox",
descr = "Default is network only if -R",
})
config["remotelogging"] = cfe ({
name="remotelogging",
label = "Log to IP or hostname on PORT",
descr = "host[:PORT] - Default PORT=514/UDP",
value = configcontent["SYSLOGD_OPTS"]["-R"],
})
-- Next section is to print errormessages when configs are wrong
if (configcontent["SYSLOGD_OPTS"]["-l"]) and
((tonumber(configcontent["SYSLOGD_OPTS"]["-l"]) == nil) or (tonumber(configcontent["SYSLOGD_OPTS"]["-l"]) > 8)) then
config["loglevel"]["errtxt"] = "Log value is out of range!\nCurrent value in config is '" ..
configcontent["SYSLOGD_OPTS"]["-l"] ..
"' - This is invalid!\nPlease select one of the above and save your changes."
table.insert(config["loglevel"]["option"], tonumber(configcontent["SYSLOGD_OPTS"]["-l"]))
end
if (configcontent["SYSLOGD_OPTS"]["-L"] ~= nil) and ((configcontent["SYSLOGD_OPTS"]["-R"] == nil) or (configcontent["SYSLOGD_OPTS"]["-R"] == "")) then
config["localandnetworklog"]["errtxt"] = "Logging to local and network (-L) is not possible unless you define a host (-R) for remote logging or remove this option."
end
-- Sum all errors into one cfe
local sumerrors = ""
for k,v in pairs(config) do
if (config[k]["errtxt"]) then
sumerrors = sumerrors .. config[k]["errtxt"] .. "\n"
end
end
if (sumerrors ~= "") then
config["sumerrors"] = cfe ({
name="sumerrors",
label = "Configuration errors",
errtxt = sumerrors,
})
end
return config
end
-- IMPORTANT! This function is a exception! It's not fed with CFE's
-- Parameter should be one of the ones defined in the variable 'variabletranslator'.
-- value should be whatever the new value should be.
function setconfigs(self,parameter,value)
-- Set variables
local variable = "SYSLOGD_OPTS"
local variabletranslator = ({
logfile = "-O",
loglevel = "-l",
smallerlogs = "-S",
maxsize = "-s",
numrotate = "-b",
localandnetworklog = "-L",
remotelogging = "-R",
})
cmdparameter = variabletranslator[parameter]
-- Report a error if someone tryes to use a invalid parameter
if not (cmdparameter) then
local availablevariables = ""
for k,v in pairs(variabletranslator) do
availablevariables = k .. ", " .. availablevariables
end
parameter = parameter or ""
return false, cfe({
name="syslog.model.setconfigs()",
errtxt="'" .. parameter .. "' is not a valid parameter!\nValid options are: " .. availablevariables,
})
end
--TODO: Validate so that user cant add values with '-' (could cause major breakage next time you do getopts)
-- This config-file only accepts one type of parameters (report error if someone uses wrong parameter)
if not (string.find(cmdparameter, "-%a$")) then
return false, cfe({
name="syslog.model.setconfigs()",
errtxt="Parameter must be formated '-a' (where a is one upper/lowercase letter [a-z])",
})
end
-- Validate userinput (if valid path/filename)
if (value) and (cmdparameter == "-O") then
local cmdresult, cmdmessage = validator.is_valid_filename(value, "/var/log" )
if not (cmdresult) then
return false, cfe({
name="syslog.model.setconfigs()",
errtxt=cmdmessage,
})
end
end
-- Validate userinput (Has the user entered a valid hostname and/or port)
if (value) and (cmdparameter == "-R") then
local hostport = format.string_to_table(value, ":")
local host = hostport[1]
local port = hostport[2]
if (port) and not (validator.is_port(port)) then
return false, cfe({
name="syslog.model.setconfigs.getopts.setoptsinfile()",
errtxt="You entered '" .. tostring(port) .. "' as port - This is not valid!",
})
end
end
-- Set/Unset checkbox variables
if (value) and ((cmdparameter == "-S") or (cmdparameter == "-L")) then value = "" end
local cmdresult, cmdmessage, cmderror = getopts.setoptsinfile(configfile,variable,cmdparameter,value)
if (cmderror) then
return false, cfe({
name="syslog.model.setconfigs.getopts.setoptsinfile()",
errtxt=cmderror,
})
end
return true, cfe({
name="syslog.model.setconfigs()",
value=cmdmessage,
})
end
-- modifications should be a CFE
function update_filecontent (self, modifications)
local path = configfile
local file_result,err = fs.write_file(path, format.dostounix(modifications))
return file_result, err
end
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