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local mymodule = {}
-- Load libraries
posix = require("posix")
modelfunctions = require("modelfunctions")
fs = require("acf.fs")
format = require("acf.format")
validator = require("acf.validator")
-- Set variables
local configfile = "/etc/lbu/lbu.conf"
-- ################################################################################
-- LOCAL FUNCTIONS
local function get_version ()
local programversion = modelfunctions.run_executable({"lbu"}, true)
return string.match(programversion, "^[^\n]*")
end
local function getLbuStatus()
local ret = {}
local f = modelfunctions.run_executable({"lbu", "status", "-v"}, true)
for line in string.gmatch(f, "[^\n]+") do
if (string.match(line, "^Include files")) then break end
if (string.match(line, "^Exclude files")) then break end
local status, name = string.match(line, "^(%S)%s+(.+)$")
if (status) and (name) then
ret[string.gsub('/' .. name, "/+", "/")] = status
end
end
return ret
end
local function availablemedias()
local medias = {}
local found = {}
-- First, look in fstab
local fstab = fs.read_file("/etc/fstab") or ""
for media in string.gmatch(fstab, "/media/(%w+)%s") do
if not string.find(media, "^cdrom") and not string.find(media, "^dvd") then
medias[#medias+1] = media
found[media] = true
end
end
-- Then, look in result of 'mount'
local mount = modelfunctions.run_executable({"mount"})
for media in string.gmatch(mount, "/media/(%w+)%s") do
if not string.find(media, "^cdrom") and not string.find(media, "^dvd") and not found[media] then
medias[#medias+1] = media
end
end
table.sort(medias)
return medias
end
local function getciphers()
local opensslciphers = {}
local watchdog = nil
local f = modelfunctions.run_executable({"openssl", "-v"}, true)
for line in string.gmatch(f, "[^\n]+") do
if (watchdog) then
for cipher in string.gmatch(line, "(%S+)") do
table.insert(opensslciphers,tostring(cipher))
end
end
if (string.match(line, "^Cipher commands")) then watchdog="yes" end
end
return opensslciphers
end
local function validateconfig(config)
-- Set errormessages when configs are wrong
config.value.LBU_MEDIA.errtxt = "Invalid Media"
for i,media in ipairs(config.value.LBU_MEDIA.option) do
if media == config.value.LBU_MEDIA.value then
config.value.LBU_MEDIA.errtxt = nil
break
end
end
config.value.DEFAULT_CIPHER.errtxt = "Invalid Cipher"
for i,cipher in ipairs(config.value.DEFAULT_CIPHER.option) do
if cipher == config.value.DEFAULT_CIPHER.value then
config.value.DEFAULT_CIPHER.errtxt = nil
break
end
end
if config.value.PASSWORD.value == "" and config.value.ENCRYPTION.value then
config.value.PASSWORD.errtxt = "Encryption without password is not allowed!\nDeactivate password protection or configure a password!"
end
if not validator.is_integer(config.value.BACKUP_LIMIT.value) then
config.value.BACKUP_LIMIT.errtxt = "Must be an integer"
end
for name,value in pairs(config.value) do
if value.errtxt then
config.errtxt = "Invalid Config"
break
end
end
return config
end
local function replacestring (string, find, replace)
local count
string,count = string.gsub(string, find, replace)
if 0 == count then
string = string .. replace
end
return string
end
local function validatefilelist(filelist)
local errors = {}
local files = {}
for line in string.gmatch(format.dostounix(filelist.value).."\n", "([^\n]*)\n") do
if not string.match(line, "^%s*$") then
local glob = posix.glob("/"..line)
if not glob then
errors[#errors+1] = '"' .. tostring(line) .. '" not a valid file/directory'
files[#files+1] = line
else
for i,value in pairs(glob) do
files[#files+1] = string.gsub(value, "^/+", "")
end
end
end
end
filelist.value = table.concat(files, "\n")
if #errors ~= 0 then
filelist.errtxt = table.concat(errors, "\n")
end
return files
end
local function validatefilecontent (filedetails)
local success = true
local clientdata = clientdata or self.clientdata or {}
clientdata.configcontents = filedetails.value.filecontent.value
local config = mymodule.getconfig(nil, clientdata)
local errors = {}
for name,value in pairs(config.value) do
if value.errtxt then
errors[#errors+1] = value.errtxt
end
end
if #errors > 0 then
success = false
filedetails.value.filecontent.errtxt = table.concat(errors, "\n")
end
return success, filedetails
end
-- ################################################################################
-- PUBLIC FUNCTIONS
function mymodule.getstatus ()
local status = {}
status["version"] = cfe({
value=get_version(),
label="Program version",
})
status["committed"] = cfe({
type="boolean",
value=(#mymodule.list().value==0),
descr=descrtxt,
label="Program status",
})
local config = mymodule.getconfig()
status["LBU_MEDIA"] = config.value.LBU_MEDIA
if (config.value.ENCRYPTION.value) then
status["DEFAULT_CIPHER"] = config.value.DEFAULT_CIPHER
end
return cfe({ type="group", value=status, label="LBU Status" })
end
function mymodule.list()
local ret = {}
local lbuStatus = getLbuStatus()
for k,v in pairs(lbuStatus) do
ret[#ret + 1] = { name=k, status=v }
end
table.sort(ret, function(a,b) return (a.name < b.name) end)
return cfe({ type="structure", value=ret, label="List of changes" })
end
function mymodule.getconfig (self, clientdata)
local clientdata = clientdata or {}
local config = {}
local configopts = {}
if clientdata.configcontents then
configopts = format.parse_ini_file(clientdata.configcontents, "") or {}
elseif (fs.is_file(configfile)) then
configopts = format.parse_ini_file(fs.read_file(configfile) or "", "") or {}
end
config["LBU_MEDIA"] = cfe({
value=configopts.LBU_MEDIA or "",
label="Media for commit",
type="select",
option=availablemedias() or {},
})
config["ENCRYPTION"] = cfe({
value=(configopts.ENCRYPTION ~= nil),
label="Password protected commits",
type="boolean",
})
config["DEFAULT_CIPHER"] = cfe({
value=configopts.DEFAULT_CIPHER or "",
label="Cipher to use for encryption",
option=getciphers() or {},
type="select",
})
config["PASSWORD"] = cfe({
value=configopts.PASSWORD or "",
label="Password when encrypting",
})
config["BACKUP_LIMIT"] = cfe({
value=configopts.BACKUP_LIMIT or "0",
label="Backup archive limit",
})
retval = cfe({ type="group", value=config, label="LBU Config" })
validateconfig(retval)
return retval
end
function mymodule.setconfig (self, config)
validateconfig(config)
if not config.errtxt then
local content = (fs.read_file(configfile) or "").."\n"
-- LBU_MEDIA, ENCRYPTION, DEFAULT_CIPHER, PASSWORD
content = replacestring(content, "[^\n%w]*LBU_MEDIA=[^\n]*\n", "LBU_MEDIA="..config.value.LBU_MEDIA.value.."\n")
local newstring = "ENCRYPTION=$DEFAULT_CIPHER\n"
if not config.value.ENCRYPTION.value then
newstring = "#" .. newstring
end
content = replacestring(content, "[^\n%w]*ENCRYPTION=[^\n]*\n", newstring)
content = replacestring(content, "[^\n%w]*DEFAULT_CIPHER=[^\n]*\n", "DEFAULT_CIPHER="..config.value.DEFAULT_CIPHER.value.."\n")
content = replacestring(content, "[^\n%w]*PASSWORD=[^\n]*\n", "PASSWORD="..config.value.PASSWORD.value.."\n")
content = replacestring(content, "[^\n%w]*BACKUP_LIMIT=[^\n]*\n", "BACKUP_LIMIT="..config.value.BACKUP_LIMIT.value.."\n")
-- Write changes to file
fs.write_file(configfile,content)
end
return config
end
function mymodule.getincluded ()
local included = cfe({
label="Included item(s)",
type="longtext",
descr="List one file/directory per line\nAssumes root directory, no leading '/' necessary",
})
-- Read the list
included.value = modelfunctions.run_executable({"lbu", "include", "-l"})
validatefilelist(included)
return cfe({ type="group", value={included = included} })
end
function mymodule.setincluded (self, included)
local files = validatefilelist(included.value.included)
if not included.value.included.errtxt then
local current = format.string_to_table(modelfunctions.run_executable({"lbu", "include", "-l"}), "\n")
table.insert(current, 1, "-r")
table.insert(current, 1, "include")
table.insert(current, 1, "lbu")
modelfunctions.run_executable(current)
table.insert(files, 1, "include")
table.insert(files, 1, "lbu")
included.descr, included.errtxt = modelfunctions.run_executable(files)
else
included.errtxt = "Failed to set included"
end
return included
end
function mymodule.getexcluded ()
local excluded = cfe({
label="Excluded item(s)",
type="longtext",
descr="List one file/directory per line\nAssumes root directory, no leading '/' necessary",
})
-- Read the list
excluded.value = modelfunctions.run_executable({"lbu", "exclude", "-l"})
validatefilelist(excluded)
return cfe({ type="group", value={excluded = excluded} })
end
function mymodule.setexcluded (self, excluded)
local files = validatefilelist(excluded.value.excluded)
if not excluded.value.excluded.errtxt then
local current = format.string_to_table(modelfunctions.run_executable({"lbu", "exclude", "-l"}), "\n")
table.insert(current, 1, "-r")
table.insert(current, 1, "exclude")
table.insert(current, 1, "lbu")
modelfunctions.run_executable(current)
table.insert(files, 1, "exclude")
table.insert(files, 1, "lbu")
excluded.descr, excluded.errtxt = modelfunctions.run_executable(files)
else
excluded.errtxt = "Failed to set excluded"
end
return excluded
end
function mymodule.get_filedetails()
return modelfunctions.getfiledetails(configfile)
end
function mymodule.set_filedetails(self, filedetails)
return modelfunctions.setfiledetails(self, filedetails, {configfile}, validatefilecontent)
end
function mymodule.getcommit()
local simulate = cfe({ type="boolean", value=false, label="Simulate a commit" })
local delete = cfe({ type="boolean", value=false, label="Remove existing overlays on commit" })
return cfe({ type="group", value={simulate=simulate, delete=delete}, label="Commit changes" })
end
function mymodule.commit(self, input)
if input.value.simulate.value and input.value.delete.value then
input.errtxt = "Cannot delete overlays when simulating"
else
local flag = "-v"
if input.value.simulate.value then flag=flag.." -n" end
if input.value.delete.value then flag=flag.." -d" end
input.descr, input.errtxt = modelfunctions.run_executable({"lbu", "commit", flag}, true)
end
return input
end
function mymodule.getbackupfiles()
local files = {}
local content = modelfunctions.run_executable({"lbu", "lb"})
if not string.match(content, "usage: lbu") then
for line in string.gmatch(content, "([^\n]+)\n?") do
files[#files + 1] = line
end
end
return cfe({ type="list", value=files, label="Backup archive list"})
end
function mymodule.get_selectbackup(self, clientdata)
local result = {}
result.backup = cfe({ type="select", value=clientdata.backup or "", label="Backup" })
local files = mymodule.getbackupfiles()
result.backup.option = files.value
return cfe({ type="group", value=result, label="Revert to Backup" })
end
function mymodule.selectbackupfile(self, backuprequest)
local success = modelfunctions.validate_select(backuprequest.value.backup)
if success then
backuprequest.descr, backuprequest.errtxt = modelfunctions.run_executable({"lbu", "revert", backuprequest.value.backup.value})
if not backuprequest.errtxt and backuprequest.descr == "" then
backuprequest.descr = "Reverted to backup "..file
end
else
backuprequest.errtxt = "Failed to revert to backup"
end
return backuprequest
end
function mymodule.getpackage()
-- create a temporary directory to store the file
session = require("session")
local tmp = "/tmp/"..session.random_hash(10)
while posix.stat( tmp ) do
tmp = "/tmp/"..session.random_hash(10)
end
posix.mkdir(tmp)
local cmdresult, errtxt = modelfunctions.run_executable({"lbu", "package", tmp}, true)
-- find and read the file
local package = cfe({ type="raw", label="error", option="application/x-gzip", errtxt=errtxt })
for name in fs.find(".*tar%.gz", tmp) do
package.label = posix.basename(name)
package.value = fs.read_file(name) or ""
break
end
-- delete the temp directory and file
fs.remove_directory(tmp)
return package
end
return mymodule
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