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module(..., package.seeall)
require("posix")
require("fs")
require("format")
local path = "PATH=/usr/bin:/bin:/usr/sbin:/sbin "
function package_version(packagename)
local result
local errtxt = "Program not installed"
local f = io.popen( "PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin apk_version -vs " .. format.escapespecialcharacters(packagename) )
local cmdresult = f:read("*a") or ""
f:close()
for line in string.gmatch(cmdresult, "[^\n]+") do
if string.match(line, "^"..format.escapemagiccharacters(packagename).."-") then
result = string.match(line, "%S+")
errtxt = nil
break
end
end
return result,errtxt
end
function process_startupsequence(servicename)
local result
local errtxt = "Not programmed to autostart"
local f = io.popen( "/sbin/rc_status" )
local cmdresult = f:read("*a") or ""
f:close()
for line in string.gmatch(cmdresult, "[^\n]+") do
if string.match(line, "^%a%d%d"..format.escapemagiccharacters(servicename).."$") then
result = "Service will autostart at next boot (at sequence '" .. string.match(line,"^%a(%d%d)") .. "')"
errtxt = nil
break
end
end
return result,errtxt
end
function read_startupsequence()
local config = {}
local f = io.popen( "/sbin/rc_status" )
local cmdresult = f:read("*a") or ""
f:close()
local section = 0
for line in string.gmatch(cmdresult, "([^\n]*)\n?") do
local sequence, service = string.match(line, "(%d%d)(%S+)")
if service then
if section == 3 then -- kill section
for i,cfg in ipairs(config) do
if cfg.servicename == service then
cfg.kill = true
break
end
end
else
config[#config+1] = {servicename=service, sequence=sequence, kill=false, system=(section == 1)}
end
elseif string.match(line, "^rc.%.d:") then
section = section + 1
end
end
-- Add in any missing init.d scripts
local reverseservices = {} for i,cfg in ipairs(config) do reverseservices[cfg.servicename] = i end
local temp = {}
for name in posix.files("/etc/init.d") do
if not reverseservices[name] and not string.find(name, "^rc[KLS]$") and not string.find(name, "^..?$") then
temp[#temp+1] = {servicename=name, sequence="", kill=false, system=false}
end
end
table.sort(temp, function(a,b) return a.servicename < b.servicename end)
for i,val in ipairs(temp) do
config[#config+1] = val
end
return config
end
function add_startupsequence(servicename, sequence, kill, system)
local cmdresult,cmderrors
if not servicename then
cmderrors = "Invalid service name"
else
local cmd = {path, "rc_add"}
if kill then cmd[#cmd+1] = "-k" end
if system then cmd[#cmd+1] = "-S" end
if sequence and tonumber(sequence) then cmd[#cmd+1] = "-s "..sequence end
cmd[#cmd+1] = format.escapespecialcharacters(servicename)
cmd[#cmd+1] = "2>&1"
delete_startupsequence(servicename)
local f = io.popen(table.concat(cmd, " "))
cmdresult = f:read("*a")
f:close()
if cmdresult == "" then cmdresult = "Added sequence" end
end
return cmdresult,cmderrors
end
function delete_startupsequence(servicename)
local cmdresult,cmderrors
if not servicename then
cmderrors = "Invalid service name"
else
local f = io.popen(path.."rc_delete "..format.escapespecialcharacters(servicename))
cmdresult = f:read("*a")
f:close()
if cmdresult == "" then cmderrors = "Failed to delete sequence" end
end
return cmdresult,cmderrors
end
function daemoncontrol (process, action)
local cmdresult = ""
local cmderrors
if not process then
cmderrors = "Invalid service name"
elseif (string.lower(action) == "start") or (string.lower(action) == "stop") or (string.lower(action) == "restart") then
local file = io.popen( "PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin /etc/init.d/" ..
format.escapespecialcharacters(process) .. " " .. string.lower(action) .. " 2>&1" )
if file ~= nil then
cmdresult = file:read( "*a" )
file:close()
end
posix.sleep(2) -- Wait for the process to start|stop
else
cmderrors = "Unknown command!"
end
return cmdresult,cmderrors
end
-- the following methods are available:
-- /proc/<pid>/stat the comm field (2nd) field contains name but only up
-- to 15 chars. does not resolve links
--
-- /proc/<pid>/cmdline argv[0] contains the command. However if it is a script
-- then will the interpreter show up
--
-- /proc/<pid>/exe link to exe file. this will resolv links
--
-- returns list of all pids for given exe name
--[[
-- gives lots of false positives for busybox
local function is_exe(path, name)
local f = posix.readlink(path.."/exe")
if f and (f == name or posix.basename(f) == name) then
return true
else
return false
end
end
]]--
local function is_stat(path, name)
local f = io.open(path.."/stat")
if (f) then
local line = f:read()
local p = string.gsub(line, ".*%(", "")
p = string.gsub(p, "%).*", "")
f:close()
end
if p ~= nil then
if string.len(name) <= 15 and p == name then
return true
end
end
return false
end
local function is_cmdline(path, name)
local f = io.open(path.."/cmdline")
if f == nil then
return false
end
local line = f:read()
f:close()
if line == nil then
return false
end
local arg0 = string.gsub(line, string.char(0)..".*", "")
if posix.basename(arg0) == name then
return true
end
end
local function has_pidfile(name)
local pid
local file = "/var/run/"..name..".pid"
if fs.is_file(file) then
-- check to see if there's a matching proc directory and that it was created slightly after the pid file
-- this allows us to find init scripts with differing process names and avoids the problem with
-- proc numbers wrapping
local tmp = string.match(fs.read_file(file) or "", "%d+")
if tmp then
local dir = "/proc/" .. tmp
filetime = posix.stat(file, "ctime")
dirtime = posix.stat(dir, "ctime")
if dirtime and (tonumber(dirtime) - tonumber(filetime) < 100) then
pid = tmp
end
end
end
return pid
end
function pidof(name)
local pids = {has_pidfile(name)}
local i, j
for i,j in pairs(posix.glob("/proc/[0-9]*")) do
local pid = tonumber(posix.basename(j))
if is_stat(j, name) or is_cmdline(j, name) then
table.insert(pids, pid)
end
end
if #pids == 0 then
pids = nil
end
return pids
end
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