summaryrefslogtreecommitdiffstats
path: root/lbu-model.lua
blob: 7a7ff1ea06e1b96dbf72e00f9c02bd2765157682 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
module (..., package.seeall)

-- Load libraries
require("fs")
require("format")
require("getopts")
require("daemoncontrol")

-- Set variables
local configfile = "/etc/lbu/lbu.conf"
local includefile = "/etc/lbu/include"
local excludefile = "/etc/lbu/exclude"

-- ################################################################################
-- LOCAL FUNCTIONS

local function get_version ()
	local f,error = io.popen("/sbin/lbu 2>&1")
	local programversion = f:read("*l")
	f:close()
	return programversion
end

local function getLbuStatus()
	local ret = {}
	local f = io.popen("/sbin/lbu status -v 2>&1", "r")
	if not (f) then return ret end
	for line in f:lines() 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
	f:close()
	return ret
end

local function availablemedias()
	return {"floppy","usb"}
end

local function getLbuCommit(flag)
	local err = {}
	local ret = ""
	local f = io.popen("/sbin/lbu commit " .. flag .. " 2>&1", "r")
	for line in f:lines() do
		ret = ret .. line .. "\n"
		--Look for error messages in output
		local searchrow, search = string.match(line, "^(lbu.*(%-%a).*)")
		if (search) then err[search] = searchrow end
	end
	f:close()
	return ret, err
end

local function getciphers()
	local opensslciphers = {}
	local watchdog = nil
	local f = io.popen("/usr/bin/openssl -v 2>&1", "r")
	if not (f) then return ciphers end
	for line in f:lines() 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
	f:close()
	return opensslciphers
end

local function getincexl(state)
	local incexl = {}
	if (string.lower(state) == "include") or (string.lower(state) == "exclude") then
		local f = io.popen("/sbin/lbu " .. string.lower(state) .. " -l 2>&1", "r")
		if not (f) then return incexl end
		for line in f:lines() do
			table.insert(incexl,tostring(line))
		end
		f:close()
	end
	return incexl
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

	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 filelist
end

local function validatefilecontent (filecontent)
	local config = getconfig(filecontent.value)
	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
		filecontent.errtxt = table.concat(errors, "\n")
	end

	return filecontent
end
	
-- ################################################################################
-- PUBLIC FUNCTIONS

function getstatus ()
	local status = {}
	status["version"] = cfe({
		value=get_version(),
		label="Program version",
		})

	status["committed"] = cfe({
		type="boolean",
		value=(#list().value==0),
		descr=descrtxt,
		label="Program status",
		})

	local config = 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 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 getconfig (configcontents)
	local config = {}
	local configopts = {}
	if configcontents then
		configopts = getopts.getoptsfromfile(configcontents, "") or {}
	elseif (fs.is_file(configfile)) then
		configopts = getopts.getoptsfromfile(configfile, "") 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",
		})

	retval = cfe({ type="group", value=config, label="LBU Config" })
	validateconfig(retval)

	return retval
end

function setconfig (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, "#*LBU_MEDIA=[^\n]*\n", "LBU_MEDIA="..config.value.LBU_MEDIA.value.."\n")
		local newstring = "ENCRYPTION=$DEFAULT_CIPHER\n"
		if not config.value.ENCRYPTION.value then
			newstring = "#" .. newstring
		end
		content = replacestring(content, "#*ENCRYPTION=[^\n]*\n", newstring)
		content = replacestring(content, "#*DEFAULT_CIPHER=[^\n]*\n", "DEFAULT_CIPHER="..config.value.DEFAULT_CIPHER.value.."\n")
		content = replacestring(content, "#*PASSWORD=[^\n]*\n", "PASSWORD="..config.value.PASSWORD.value.."\n")
		content = string.gsub(content,"\n*$","")

		-- Write changes to file
		fs.write_file(configfile,content)
	end

	return config
end

function getincluded ()
	local included = cfe({
		value=fs.read_file(includefile) or "",
		label="Included item(s)",
		type="longtext",
		descr="List one file/directory per line\nAssumes root directory, no leading '/' necessary",
		})
	
	validatefilelist(included)

	return included
end

function setincluded (included)
	validatefilelist(included)
	if not included.errtxt then
		fs.write_file(includefile, included.value)
	end
	return included
end

function getexcluded ()
	local excluded = cfe({
		value=fs.read_file(excludefile) or "",
		label="Excluded item(s)",
		type="longtext",
		descr="List one file/directory per line\nAssumes root directory, no leading '/' necessary",
		})

	validatefilelist(excluded)

	return excluded
end

function setexcluded (excluded)
	validatefilelist(excluded)
	if not excluded.errtxt then
		fs.write_file(excludefile, excluded.value)
	end
	return excluded
end

function get_filedetails()
	local filename = cfe({ value=configfile, label="File name" })
	local filecontent = cfe({ type="longtext", label="Config file" })
	local filesize = cfe({ value="0", label="File size" })
	local mtime = cfe({ value="---", label="File date" })

	if fs.is_file(configfile) then
		local filedetails = fs.stat(configfile)
		filecontent.value = fs.read_file(configfile)
		filesize.value = filedetails.size
		mtime.value = filedetails.mtime

		validatefilecontent(filecontent)
	else
		filename.errtxt = "File not found"
	end

	return cfe({ type="group", value={filename=filename, filecontent=filecontent, filesize=filesize, mtime=mtime}, label="Config file details" })
end

function set_filecontent (filecontent)
	filecontent.value = format.dostounix(filecontent.value)
	validatefilecontent(filecontent)
	if not filecontent.errtxt then
		fs.write_file(configfile, filecontent.value)
	end
	return filecontent
end

function 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 commit(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 = getLbuCommit(flag)
	end
	
	return input
end