Error Logging...

[GrimmSpector 0]

I'd like to do error/function logging, and I'd like to do it via binding the STDERR output to a filestream instead of the GPU. I'm not familiar enough with lua yet to do it. Can anyone help me with this? Thanks.

[Magik6k 17]

You probably just want to use

io.stderr:write() 

 for that

[GrimmSpector 0]

You probably just want to use

io.stderr:write() 

 for that

 

Not quite what I'm asking. I'm well aware of the io stream and method. However that logs when running a program to a temporary file, that I don't get to keep handy, and to the console.

 

I don't want it to print to the GPU at all. I ONLY want it to go to a file, and I don't want it to go to a temporary file, I want to ecapsulate extra logging information and all error debug information out to a file of my choosing. Ideally with a bit of parsing to make it more readable. I can't figure out how to adjust the stream to

a) not go to the GPU

go to a file of my own choosing

 

Seems to be a weird thing to do in lua?

[TYKUHN2 2]

Simple function injection

function io.stderr:write(str)
	logFile = filesystem.open(self.path, "a")
	logFile:write(str.."\n")
	logFile:close()
	return self
end

Either replace self.path with a path or leave it as is and change io.stderr.path to change the path of the next error log writes.

[Gorzoid 10]

not sure if OpenOS allows advanced redirecting but you can try

program.lua 2> errorlog.txt

[GrimmSpector 0]

Simple function injection

function io.stderr:write(str)
	logFile = filesystem.open(self.path, "a")
	logFile:write(str.."\n")
	logFile:close()
	return self
end

Either replace self.path with a path or leave it as is and change io.stderr.path to change the path of the next error log writes.

 

Perfect, thanks!

[GrimmSpector 0]

Simple function injection

function io.stderr:write(str)
	logFile = filesystem.open(self.path, "a")
	logFile:write(str.."\n")
	logFile:close()
	return self
end

Either replace self.path with a path or leave it as is and change io.stderr.path to change the path of the next error log writes.

 

Well...this crashes the OC hard...

"Unrecoverable Error"

controller.lua:50: attempt to index global 'logFile' (a nil value) 

[TYKUHN2 2]

What did you set io.stderr.path to?

 

For verbose error logging try

oldStderr = io.stderr

function io.stderr:write(str)
	logFile, err = filesystem.open(self.path, "a")
        if not logFile then
            io.stderr = oldStderr
            error(err)
        end
	logFile:write(str.."\n")
	logFile:close()
	return self
end