This file is indexed.

/usr/bin/initctl2dot is in upstart 1.11-5.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  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
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
#!/usr/bin/python3
# -*- coding: utf-8 -*-
#---------------------------------------------------------------------
#
# Copyright © 2011 Canonical Ltd.
#
# Author: James Hunt <james.hunt@canonical.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# Script to take output of "initctl show-config -e" and convert it into
# a Graphviz DOT language (".dot") file for procesing with dot(1), etc.
#
# Notes:
#
# - Slightly laborious logic used to satisfy graphviz requirement that
#   all nodes be defined before being referenced.
#
# Usage:
#
#   initctl show-config -e > initctl.out
#   initctl2dot -f initctl.out -o upstart.dot
#   dot -Tpng -o upstart.png upstart.dot
#
# Or more simply:
#
#  initctl2dot -o - | dot -Tpng -o upstart.png
#
# See also:
#
# - dot(1).
# - initctl(8).
# - http://www.graphviz.org.
#---------------------------------------------------------------------

import sys
import re
import fnmatch
import os
import datetime
from subprocess import Popen, PIPE
from argparse import ArgumentParser

options = None
jobs = {}
events = {}
script_name = os.path.basename(sys.argv[0])

cmd = None
use_system = True
upstart_session = None

# list of jobs to restict output to
restrictions_list = []

sanitise_table = str.maketrans({
    '-': '_',
    '$': 'dollar_',
    '[': 'lbracker',
    ']': 'rbracker',
    '!': 'bang',
    ':': 'colon',
    '*': 'star',
    '?': 'question',
    '.': 'dot',
    '/': 'slash',
})

default_color_emits = 'green'
default_color_start_on = 'blue'
default_color_stop_on = 'red'
default_color_event = 'thistle'
default_color_job = '#DCDCDC'  # "Gainsboro"
default_color_text = 'black'
default_color_bg = 'white'

default_outfile = 'upstart.dot'


def header(ofh):
    ofh.write("""digraph upstart {{
  node [shape=\"diamond\", fontcolor=\"{options.color_event_text}\", """
              """fillcolor=\"{options.color_event}\", style=\"filled\"];
  rankdir=LR;
  overlap=false;
  bgcolor=\"{options.color_bg}\";
  fontcolor=\"{options.color_text}\";
""".format(options=options))


def footer(ofh):
    global upstart_session
    global use_system

    details = ''

    if use_system:
        details += "\\nfor the system\\n"
    else:
        details += "\\nfor session '%s'\\n" % upstart_session

    if options.restrictions:
        details += "(subset, "
    else:
        details += "("

    if options.infile:
        details += "from file data)."
    else:
        details += "from '%s' on host %s)." % (cmd, os.uname()[1])

    ofh.write("  overlap=false;\n"
              "  label=\"Generated on {datenow} by {script_name} {details}\\n"
              "Boxes of color {options.color_job} denote jobs.\\n"
              "Solid diamonds of color {options.color_event} denote events.\\n"
              "Dotted diamons denote 'glob' events.\\n"
              "Emits denoted by {options.color_emits} lines.\\n"
              "Start on denoted by {options.color_start_on} lines.\\n"
              "Stop on denoted by {options.color_stop_on} lines.\\n"
              "\";\n"
              "}}\n".format(options=options, datenow=datetime.datetime.now(),
                            script_name=script_name, details=details))


# Map punctuation to symbols palatable to graphviz
# (which amongst other things dislikes dashes in node names)
def sanitise(s):
    global sanitise_table

    return s.translate(sanitise_table)


# Convert a dollar in @name to a unique-ish new name, based on @job and
# return it. Used for very rudimentary instance handling.
def encode_dollar(job, name):
    if name[0] == '$':
        name = job + ':' + name
    return name


# Jobs and events can have identical names, so prefix them to namespace
# them off.
def mk_job_node_name(name):
    return sanitise('job_' + name)


def mk_event_node_name(name):
    return sanitise('event_' + name)


def show_event(ofh, name):
    str = "  %s [label=\"%s\", shape=diamond, fontcolor=\"%s\", " \
          "fillcolor=\"%s\"," % (mk_event_node_name(name), name,
                                 options.color_event_text, options.color_event)

    if '*' in name:
        str += " style=\"dotted\""
    else:
        str += " style=\"filled\""

    str += "];\n"

    ofh.write(str)


def show_events(ofh):
    events_to_show = []

    if restrictions_list:
        for job in restrictions_list:

            # We want all events emitted by the jobs in the restrictions_list.
            events_to_show += jobs[job]['emits']

            # We also want all events that jobs in restrictions_list start/stop
            # on.
            events_to_show += jobs[job]['start on']['event']
            events_to_show += jobs[job]['stop on']['event']

            # We also want all events emitted by all jobs that jobs in the
            # restrictions_list start/stop on. Finally, we want all events
            # emmitted by those jobs in the restrictions_list that we
            # start/stop on.
            for j in jobs[job]['start on']['job']:
                if j in jobs and 'emits' in jobs[j]:
                    events_to_show += jobs[j]['emits']

            for j in jobs[job]['stop on']['job']:
                if j in jobs and 'emits' in jobs[j]:
                    events_to_show += jobs[j]['emits']
    else:
        events_to_show = events

    for e in events_to_show:
        show_event(ofh, e)


def show_job(ofh, name):
    ofh.write("  %s [shape=\"record\", label=\"<job> %s | { <start> start on |"
              " <stop> stop on }\", fontcolor=\"%s\", style=\"filled\", "
              " fillcolor=\"%s\"];\n" % (mk_job_node_name(name), name,
                                         options.color_job_text,
                                         options.color_job))


def show_jobs(ofh):
    if restrictions_list:
        jobs_to_show = restrictions_list
    else:
        jobs_to_show = jobs

    for j in jobs_to_show:
        show_job(ofh, j)
        # add those jobs which are referenced by existing jobs, but which
        # might not be available as .conf files. For example, plymouth.conf
        # references gdm *or* kdm, but you are unlikely to have both
        # installed.
        for s in jobs[j]['start on']['job']:
            if s not in jobs_to_show:
                show_job(ofh, s)

        for s in jobs[j]['stop on']['job']:
            if s not in jobs_to_show:
                show_job(ofh, s)

    # Having displayed the jobs in restrictions_list,
    # we now need to display all jobs that *those* jobs
    # start on/stop on.
    for j in restrictions_list:
        for job in jobs[j]['start on']['job']:
            show_job(ofh, job)
        for job in jobs[j]['stop on']['job']:
            show_job(ofh, job)

    # Finally, show all jobs which emit events that jobs in the
    # restrictions_list care about.
    for j in restrictions_list:
        for e in jobs[j]['start on']['event']:
            for k in jobs:
                if e in jobs[k]['emits']:
                    show_job(ofh, k)

        for e in jobs[j]['stop on']['event']:
            for k in jobs:
                if e in jobs[k]['emits']:
                    show_job(ofh, k)


def show_edge(ofh, from_node, to_node, color):
    ofh.write("  %s -> %s [color=\"%s\"];\n" % (from_node, to_node, color))


def show_start_on_job_edge(ofh, from_job, to_job, relation):
    if relation == 'starting':
        show_edge(ofh, "%s:start" % mk_job_node_name(from_job),
                  "%s:job" % mk_job_node_name(to_job),options.color_start_on)
    else:
        show_edge(ofh, "%s:job" % mk_job_node_name(to_job),
                  "%s:start" % mk_job_node_name(from_job), options.color_start_on)


def show_start_on_event_edge(ofh, from_job, to_event):
    show_edge(ofh, mk_event_node_name(to_event),
              "%s:start" % mk_job_node_name(from_job), options.color_start_on)


def show_stop_on_job_edge(ofh, from_job, to_job):
    show_edge(ofh, "%s:job" % mk_job_node_name(to_job),
              "%s:stop" % mk_job_node_name(from_job), options.color_stop_on)


def show_stop_on_event_edge(ofh, from_job, to_event):
    show_edge(ofh, mk_event_node_name(to_event),
              "%s:stop" % mk_job_node_name(from_job), options.color_stop_on)


def show_job_emits_edge(ofh, from_job, to_event):
    show_edge(ofh, "%s:job" % mk_job_node_name(from_job),
              mk_event_node_name(to_event), options.color_emits)


def show_edges(ofh):
    glob_jobs = {}

    if restrictions_list:
        jobs_list = restrictions_list
    else:
        jobs_list = jobs

    for job in jobs_list:
        for s in jobs[job]['start on']['job']:
            show_start_on_job_edge(ofh, job, s, jobs[job]['start on']['job'][s])

        for s in jobs[job]['start on']['event']:
            show_start_on_event_edge(ofh, job, s)

        for s in jobs[job]['stop on']['job']:
            show_stop_on_job_edge(ofh, job, s)

        for s in jobs[job]['stop on']['event']:
            show_stop_on_event_edge(ofh, job, s)

        for e in jobs[job]['emits']:
            if '*' in e:
                # handle glob patterns in 'emits'
                glob_events = []
                for _e in events:
                    if e != _e and fnmatch.fnmatch(_e, e):
                        glob_events.append(_e)
                glob_jobs[job] = glob_events

            show_job_emits_edge(ofh, job, e)

        if not restrictions_list:
            continue

        # Add links to events emitted by all jobs which current job
        # start/stops on
        for j in jobs[job]['start on']['job']:
            if j not in jobs:
                continue
            for e in jobs[j]['emits']:
                show_job_emits_edge(ofh, j, e)

        for j in jobs[job]['stop on']['job']:
            for e in jobs[j]['emits']:
                show_job_emits_edge(ofh, j, e)

    # Create links from jobs (which advertise they emits a class of
    # events, via the glob syntax) to all the events they create.
    for g in glob_jobs:
        for ge in glob_jobs[g]:
            show_job_emits_edge(ofh, g, ge)

    if not restrictions_list:
        return

    # Add jobs->event links to jobs which emit events that current job
    # start/stops on.
    for j in restrictions_list:
        for e in jobs[j]['start on']['event']:
            for k in jobs:
                if e in jobs[k]['emits'] and e not in restrictions_list:
                    show_job_emits_edge(ofh, k, e)

        for e in jobs[j]['stop on']['event']:
            for k in jobs:
                if e in jobs[k]['emits'] and e not in restrictions_list:
                    show_job_emits_edge(ofh, k, e)


def read_data():
    global cmd
    global upstart_session
    global use_system

    if options.infile:
        try:
            ifh = open(options.infile, 'r')
        except:
            sys.exit("ERROR: cannot read file '%s'" % options.infile)
    else:
        try:
            ifh = Popen(cmd.split(), stdout=PIPE,
                        universal_newlines=True).stdout
        except:
            sys.exit("ERROR: cannot run '%s'" % cmd)

    job = None
    for line in ifh:
        line = line.rstrip()

        result = re.match('^\s+start on ([^,]+) \(job:\s*([^,]*), env:', line)
        if result:
            _event = encode_dollar(job, result.group(1))
            _job = result.group(2)
            if _job:
                jobs[job]['start on']['job'][_job] = _event
            else:
                jobs[job]['start on']['event'][_event] = 1
                events[_event] = 1
            continue

        result = re.match('^\s+stop on ([^,]+) \(job:\s*([^,]*), env:', line)
        if result:
            _event = encode_dollar(job, result.group(1))
            _job = result.group(2)
            if _job:
                jobs[job]['stop on']['job'][_job] = 1
            else:
                jobs[job]['stop on']['event'][_event] = 1
                events[_event] = 1
            continue

        if re.match('^\s+emits', line):
            event = line.lstrip().split()[1]
            event = encode_dollar(job, event)
            events[event] = 1
            jobs[job]['emits'][event] = 1
        else:
            tokens = line.lstrip().split()

            if len(tokens) != 1:
                sys.exit("ERROR: invalid line: %s" % line.lstrip())

            job_record = {}

            start_on = {}
            start_on_jobs = {}
            start_on_events = {}

            stop_on = {}
            stop_on_jobs = {}
            stop_on_events = {}

            emits = {}

            start_on['job'] = start_on_jobs
            start_on['event'] = start_on_events

            stop_on['job'] = stop_on_jobs
            stop_on['event'] = stop_on_events

            job_record['start on'] = start_on
            job_record['stop on'] = stop_on
            job_record['emits'] = emits

            job = (tokens)[0]
            jobs[job] = job_record


def main():
    global options
    global restrictions_list
    global cmd
    global use_system
    global upstart_session

    description = "Convert initctl(8) output to GraphViz dot(1) format."
    epilog = "See http://www.graphviz.org/doc/info/colors.html " \
             "for available colours."

    parser = ArgumentParser(description=description, epilog=epilog)

    parser.add_argument("-r", "--restrict-to-jobs",
                        dest="restrictions",
                        help="Limit display of 'start on' and 'stop on' "
                        "conditions to specified jobs (comma-separated list).")

    parser.add_argument("-f", "--infile",
                        dest="infile",
                        help="File to read output from. If not specified"
                        ", initctl will be run automatically.")

    parser.add_argument("-o", "--outfile",
                        dest="outfile",
                        help="File to write output to (default=%s)" %
                             default_outfile)

    parser.add_argument("--color-emits",
                        dest="color_emits",
                        help="Specify color for 'emits' lines (default=%s)." %
                             default_color_emits)

    parser.add_argument("--color-start-on",
                        dest="color_start_on",
                        help="Specify color for 'start on' lines "
                             "(default=%s)." % default_color_start_on)

    parser.add_argument("--color-stop-on",
                        dest="color_stop_on",
                        help="Specify color for 'stop on' lines "
                             "(default=%s)." % default_color_stop_on)

    parser.add_argument("--color-event",
                        dest="color_event",
                        help="Specify color for event boxes (default=%s)." %
                             default_color_event)

    parser.add_argument("--color-text",
                        dest="color_text",
                        help="Specify color for summary text (default=%s)." %
                             default_color_text)

    parser.add_argument("--color-bg",
                        dest="color_bg",
                        help="Specify background color for diagram "
                             "(default=%s)." % default_color_bg)

    parser.add_argument("--color-event-text",
                        dest="color_event_text",
                        help="Specify color for text in event boxes "
                             "(default=%s)." % default_color_text)

    parser.add_argument("--color-job-text",
                        dest="color_job_text",
                        help="Specify color for text in job boxes "
                             "(default=%s)." % default_color_text)

    parser.add_argument("--color-job",
                        dest="color_job",
                        help="Specify color for job boxes (default=%s)." %
                             default_color_job)

    parser.add_argument("--user",
                        dest="system",
                        default=None,
                        action='store_false',
                        help="Connect to Upstart user session (default if running within a user session).")

    parser.add_argument("--system",
                        dest="system",
                        default=None,
                        action='store_true',
                        help="Connect to Upstart system session.")

    parser.set_defaults(color_emits=default_color_emits,
                        color_start_on=default_color_start_on,
                        color_stop_on=default_color_stop_on,
                        color_event=default_color_event,
                        color_job=default_color_job,
                        color_job_text=default_color_text,
                        color_event_text=default_color_text,
                        color_text=default_color_text,
                        color_bg=default_color_bg,
                        outfile=default_outfile)

    options = parser.parse_args()

    if options.outfile == '-':
        ofh = sys.stdout
    else:
        try:
            ofh = open(options.outfile, "w")
        except:
            sys.exit("ERROR: cannot open file %s for writing" %
                     options.outfile)

    if options.restrictions:
        restrictions_list = options.restrictions.split(",")

    upstart_session = os.environ.get('UPSTART_SESSION', False)

    if options.system == None:
        if upstart_session:
            use_system = False
        else:
            use_system = True
    else:
        use_system = options.system or not upstart_session

    if use_system:
        cmd = "initctl --system show-config -e"
    else:
        cmd = "initctl show-config -e"

    read_data()

    for job in restrictions_list:
        if not job in jobs:
            sys.exit("ERROR: unknown job %s" % job)

    header(ofh)
    show_events(ofh)
    show_jobs(ofh)
    show_edges(ofh)
    footer(ofh)


if __name__ == "__main__":
    main()