1#!/usr/bin/ruby
2
3# display the kernel module dependencies
4
5#based on: modgraph.tcl by:  John Ellson <ellson@research.att.com>
6#ruby adaptation by:         Patricio Ros <patricioros.dev@gmail.com>
7#additional fixes:           Ralph Mueller <ralf.mueller@zmaw.de>
8
9require 'gv'
10
11G = Gv.digraph("G")
12N = Gv.protonode(G)
13E = Gv.protoedge(G)
14
15Gv.setv(G, 'rankdir', 'LR')
16Gv.setv(G, 'nodesep', '0.05')
17Gv.setv(N, 'shape', 'box')
18Gv.setv(N, 'width', '0')
19Gv.setv(N, 'height', '0')
20Gv.setv(N, 'margin', '.03')
21Gv.setv(N, 'fontsize', '8')
22Gv.setv(N, 'fontname', 'helvetica')
23Gv.setv(E, 'arrowsize', '.4')
24
25modules = File.open('/proc/modules', mode="r").readlines
26
27modules.each {|rec|
28   fields = rec.split(' ')
29   n = Gv.node(G, fields[0])
30   fields[3].split(',').each {|usedby|
31      Gv.edge(n, Gv.node(G, usedby)) if (usedby != '-') and (usedby != '')
32   }
33}
34
35Gv.layout(G, 'dot')
36Gv.render(G, 'xlib')
37