file: Fix format string check

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

buffer: Add a buffer implementation to write larger data to

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

file: Build a simple parser

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

file: Add a function to read a single integer

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Rename collect() to heartbeat()

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

parse: Add custom functions to parse token and integers

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

string: Add function to strip non-whitespace

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

string: Include <stdarg.h>

This was required for a while and when not included will break the
build.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

string: Add function to copy strings of a set input length

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

proc: Refatcor reading /proc/softirqs

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

file: Add an abstraction to read files

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

loadavg: Make the graph make sense

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Make it easier to compute custom CDEFs

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

source: Remove stepsize

We can fetch this from the heartbeat which is easier to understand in
its function.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

source: Stagger sources to avoid load peaks

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

command: Kill commands after 30 seconds

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add a source for Unbound stats

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

command: Add a helper object to run a command

This is designed to run any shell commands and parse the output. This
has to be done asynchronously so that we won't block the event loop.
That slightly adds some complications.

The command will be executed and events will be installed with the event
loop to read any stdout/stderr and store it as well as receive a signal
when the process terminates.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

util: Add a helper function to walk through a buffer

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

daemon: Mask SIGCHLD

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

util: Add a helper function to iterate through file handles

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

proto: Reduce the amount of logging

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

queue: Actually store the object in the queue

This used to never happen which is why sources with multiple objects had
their data written into the main RRD file.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Add uptime graph

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

string: Check format strings

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add source for the system's uptime

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

string: Make all functions static

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

string: Add formatting functions

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

string: Add our string comparison function

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

util: Add macros for branch prediction

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add softirqs

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

queue: Fail if the object contains invalid characters

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add sources for IPv4 fragmentation information

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

Add source for memory usage

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

daemon: Use macros to convert time

That way, I will hopefully not get the maths wrong all the time.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

source: Complain if the heartbeat was called too late

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

source: Complain if something stalls the event loop

This source will also be de-prioritized so that other sources can work
better.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add a test that stalls the event loop

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

source: Lower the heartbeat if a source is in error state

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Store result codes and check for patterns

That way we can disable any sources which constantly fail and we might
as well detect flapping.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add some tests

Oone constantly returns an error, the other one returns an error with a
probability of 50%. They are to test the internal error handling.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add source for disk usage

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

po: Update translations

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add PSI for I/O

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add PSI for memory

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add PSI for CPU

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Make it configurable if the graph is reversed

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

Add a processor graph

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

sources: Add source for processor usage

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Add context switch graph

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: conntrack: Remove unused color definitions

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Add macro to format headers

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Add macros to draw transparent areas easier

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Consolidate macros with and without label

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Create macros to write less code

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

po: Update translations

This is to make "make distcheck" happy.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Add a conntrack graph

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Move all stuff that is needed to draw graphs into a new header

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

daemon: Rename modules to sources

This makes more sense as the graphs have now been split into their own
modules, and so we won't have a too generic term for the sources.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

modules: Rename methods to impl

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Measure the time it takes to generate a graph

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Add title and vertical label

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Always pass --rigid

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Add upper and lower limits

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Make backgrounds transparent

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

colors: Fix black and white

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

colors: Remove the prefix

I suppose there will be no collisions in the namespace.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

loadavg: Add a simple graph

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Add macros to draw some elements

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

colors: Add macro to make colors transparent

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

colors: Add orange

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Draw all graphs from back to front

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

client: Use a helper function to send format

No functional changes, just less code.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Allow specifying the output dimensions

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Fix the text on the watermark

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Send further rendering options over dbus

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Allow to specify the output format

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Add a struct with further rendering options

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

client: Accept a --format argument

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

client: Add a basic client to fetch the graphs

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

module: Define all DEFs and VDEFs for any imported modules

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Cast arguments to void* to deal with API breakage

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Log the size of the generated output

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Write the graph to the output stream

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Import the default arguments from the Python implementation

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

Make Gettext available

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

Import some colours from the Python implementation

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Fix calling rrd_graph()

There is pretty much no documenation of librrd and the API has been
changed multiple times. Initially, various arguments have been labeled
optional, but that does not seem to be true for at least the
implementation I am testing against.

So we pass all variables that we function has, and we might as well
include them in the debugging output.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

args: Add function to add multiple pre-formatted arguments at once

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

module: Remove hack where the event loop stores the reference

This was needed when we did not have a proper registry for all modules,
but it seems that that is now the easier way.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Pass the object to the render function

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Add a helper function to pull in all data sources from a module

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Add a render function to jump into the individual graphs

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

modules: Add function to fetch a specific module by its name

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

daemon: Add function to fetch all modules

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Create the basic to render a graph

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Fix typo in variable name

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

daemon: Create a modules registry

Just like we have for graphs now

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graphs: Take the object name as first (and only) argument

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

graph: Add a Render() method to the bus to render graphs

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>