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-- acf model for displaying logfiles
local mymodule = {}
posix = require("posix")
modelfunctions = require("modelfunctions")
fs = require("acf.fs")
format = require("acf.format")
-- These folders (and their subfolders) are going to be listed
local logfilepaths = {"/var/log"}
local function is_file_in_use(path)
return (modelfunctions.run_executable({"fuser", path}) or "unknown") ~= ""
end
-- Function to recursively insert all filenames in a dir into an array
-- Links are followed and only actual files are listed
local function recursedir(path, filearray)
filearray = filearray or {}
local k,v
for k,v in pairs(posix.dir(path) or {}) do
-- Ignore files that begins with a '.'
if not string.match(v, "^%.") then
local file = path .. "/" .. v
-- If subfolder exists, list files in this subfolder
local st = posix.stat(file)
while st and st.type == "link" do
file = posix.readlink(file)
st = posix.stat(file)
end
if st and st.type == "directory" then
recursedir(file, filearray)
elseif st and st.type == "regular" then
table.insert(filearray, file)
end
end
end
return filearray
end
-- Function to list available files for view/delete
local function list_files()
local files = {}
-- Generate a single table with all the files
for i,p in pairs(logfilepaths) do
recursedir(p, files)
end
table.sort(files)
return files
end
local do_grep = function(filecontent, grep)
if grep and grep ~= "" then
local lines = {}
for line in string.gmatch(filecontent.value, "[^\n]*\n?") do
if string.match(line, grep) then
lines[#lines+1] = line
end
end
filecontent.value = table.concat(lines) or ""
end
end
mymodule.get_filedetails = function(self, clientdata)
local retval = cfe({ type="group", value={}, label="Logfile details" })
retval.value.filename = cfe({ label="File name", key=true })
retval.value.grep = cfe({ label="Grep", key=true })
self.handle_clientdata(retval, clientdata)
local success = false
for i,file in ipairs(list_files()) do
if file == retval.value.filename.value then
success = true
break
end
end
if success then
local file = retval.value.filename.value
local st = posix.stat(file)
while st.type == "link" do
file = posix.readlink(file)
st = posix.stat(file)
end
local filedetails = modelfunctions.getfiledetails(file)
for n,v in pairs(filedetails.value) do
if n ~= "filename" then
retval.value[n] = v
end
end
if filedetails.errtxt then
retval.errtxt = filedetails.errtxt
else
do_grep(retval.value.filecontent, retval.value.grep.value)
end
else
retval.errtxt = "Invalid log file"
end
return retval
end
mymodule.tail = function(self, clientdata)
local retval = cfe({ type="group", value={}, label="Tail Logfile" })
retval.value.filename = cfe({ label="File name", key=true })
retval.value.offset = cfe({ value="0", label="File offset", key=true })
retval.value.grep = cfe({ label="Grep", key=true })
self.handle_clientdata(retval, clientdata)
retval.value.size = cfe({ value="0", label="File size" })
retval.value.filecontent = cfe({ type="longtext", label="File content" })
retval.value.filename.errtxt = "File not found"
for i,file in ipairs(list_files()) do
if ( file == retval.value.filename.value ) then
retval.value.filename.errtxt = nil
local f = io.open(retval.value.filename.value)
if tonumber(retval.value.offset.value) then
local offset = tonumber(retval.value.offset.value)
if offset < 0 then
f:seek("end", offset)
else
f:seek("set", offset)
end
retval.value.filecontent.value = f:read("*all")
retval.value.size.value = f:seek()
else
retval.value.size.value = f:seek("end")
retval.value.offset.value = retval.value.size.value
end
f:close()
do_grep(retval.value.filecontent, retval.value.grep.value)
break
end
end
return retval
end
mymodule.get = function ()
local retval = {}
for i,file in pairs(list_files()) do
local details = posix.stat(file)
details.filename = file
details.inuse = is_file_in_use(file)
table.insert(retval, details)
end
table.sort(retval, function(a,b) return a.filename < b.filename end)
return cfe({ type="structure", value=retval, label="Log Files" })
end
mymodule.get_delete = function()
local filename = cfe({ type="select", label="File name", option=list_files() })
return cfe({ type="group", value={filename=filename}, label="Delete logfile" })
end
-- Function to check if a file is deletable, and if it is, then delete it.
mymodule.delete = function (self, filetodelete)
local success = modelfunctions.validateselect(filetodelete.value.filename)
if success then
-- Check if file is deletable (or in use)
if is_file_in_use(filetodelete.value.filename.value) then
success = false
filetodelete.value.filename.errtxt = "File in use"
else
local file = filetodelete.value.filename.value
local st = posix.stat(file)
while st.type == "link" do
file = posix.readlink(file)
st = posix.stat(file)
end
local status, err = os.remove(file)
if err then
success = false
filetodelete.value.filename.errtxt = err
end
end
end
if not success then
filetodelete.errtxt = "Failed to delete file"
end
return filetodelete
end
return mymodule
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