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#!/usr/bin/env python
#
# gpsfake -- test harness for gpsd
#
# Simulates a GPS, playing back a logfile
# Most of the logic for this now lives in gps.fake,
# factored out so we can write other test programs with it.
#
# This file is Copyright (c) 2010 by the GPSD project
# BSD terms apply: see the file COPYING in the distribution root for details.
import sys, os, time, getopt, socket, random
import gps, gps.fake as gpsfake # The "as" pacifies pychecker
class Baton:
"Ship progress indications to stderr."
# By setting this > 1 we reduce the frequency of the twirl
# and speed up test runs. Should be relatively prime to the
# nunber of baton states, otherwise it will cause beat artifacts
# in the twirling.
SPINNER_INTERVAL = 11
def __init__(self, prompt, endmsg=None):
self.stream = sys.stderr
self.stream.write(prompt + "...")
if os.isatty(self.stream.fileno()):
self.stream.write(" \010")
self.stream.flush()
self.count = 0
self.endmsg = endmsg
self.time = time.time()
return
def twirl(self, ch=None):
if self.stream is None:
return
if os.isatty(self.stream.fileno()):
if ch:
self.stream.write(ch)
self.stream.flush()
elif self.count % Baton.SPINNER_INTERVAL == 0:
self.stream.write("-/|\\"[self.count % 4])
self.stream.write("\010")
self.stream.flush()
self.count = self.count + 1
return
def end(self, msg=None):
if msg == None:
msg = self.endmsg
if self.stream:
self.stream.write("...(%2.2f sec) %s.\n" % (time.time() - self.time, msg))
return
def fakeport():
"Find a port that isn't in use to bind to."
# Grab a random port from IANA's unassigned/private range. Not perfect,
# but at least less than in 16000 chance of a pair collision. It would
# be very hard to get this deterministically correct, since there would
# always be a window between port allocation and when the daemon picked
# it up. We'd need to do some kind of semaphore, etc., and even that
# wouldn't prevent collisions with other apps using the range.
return random.randint(49152, 65535)
def hexdump(s):
rep = ""
for c in s:
rep += "%02x" % ord(c)
return rep
def fakehook(linenumber, fakegps):
if len(fakegps.testload.sentences) == 0:
print >>sys.stderr, "fakegps: no sentences in test load."
raise SystemExit, 1
if linenumber % len(fakegps.testload.sentences) == 0:
if singleshot and linenumber > 0:
return False
if progress:
baton.twirl('*\010')
elif not singleshot:
sys.stderr.write("gpsfake: log cycle of %s begins.\n" % fakegps.testload.name)
time.sleep(cycle)
if linedump and fakegps.testload.legend:
ml = fakegps.testload.sentences[linenumber % len(fakegps.testload.sentences)].strip()
if not fakegps.testload.textual:
ml = hexdump(ml)
announce = fakegps.testload.legend % (linenumber % len(fakegps.testload.sentences) + 1) + ml
if promptme:
raw_input(announce + "? ")
else:
print announce
if progress:
baton.twirl()
return True
if __name__ == '__main__':
try:
(options, arguments) = getopt.getopt(sys.argv[1:], "1bc:D:fghilm:no:pP:r:s:tuvx")
except getopt.GetoptError, msg:
print "gpsfake: " + str(msg)
raise SystemExit, 1
port = None
progress = False
cycle = 0
monitor = ""
speed = 4800
linedump = False
predump = False
pipe = False
singleshot = False
promptme = False
client_init = '?WATCH={"json":true,"nmea":true}'
doptions = ""
tcp = False
udp = False
verbose = 0
for (switch, val) in options:
if (switch == '-1'):
singleshot = True
elif (switch == '-f'):
port = fakeport()
elif (switch == '-b'):
progress = True
elif (switch == '-c'):
cycle = float(val)
elif (switch == '-D'):
doptions += " -D " + val
elif (switch == '-g'):
monitor = "xterm -e gdb -tui --args "
elif (switch == '-i'):
linedump = promptme = True
elif (switch == '-l'):
linedump = True
elif (switch == '-m'):
monitor = val + " "
elif (switch == '-n'):
doptions += " -n"
elif (switch == '-x'):
predump = True
elif (switch == '-o'):
doptions = val
elif (switch == '-p'):
pipe = True
elif (switch == '-P'):
port = int(val)
elif (switch == '-r'):
client_init = val
elif (switch == '-s'):
speed = int(val)
elif (switch == '-t'):
tcp = True
elif (switch == '-u'):
udp = True
elif (switch == '-v'):
verbose += 1
elif (switch == '-h'):
sys.stderr.write("usage: gpsfake [-h] [-l] [-m monitor] [--D debug] [-o options] [-p] [-s speed] [-c cycle] [-b] logfile\n")
raise SystemExit,0
if not arguments:
print >>sys.stderr, "gpsfake: requires at least one logfile argument."
raise SystemExit, 1
if progress:
baton = Baton("Processing %s" % ",".join(arguments), "done")
else:
print >>sys.stderr, "Processing %s" % ",".join(arguments)
test = gpsfake.TestSession(prefix=monitor, port=port, options=doptions,
tcp=tcp, udp=udp, verbose=verbose,
predump=predump)
if pipe:
test.reporter = sys.stdout.write
if verbose:
progress = False
test.progress = sys.stdout.write
test.spawn()
try:
for logfile in arguments:
try:
test.gps_add(logfile, speed=speed, pred=fakehook)
except gpsfake.TestLoadError, e:
sys.stderr.write("gpsfake: " + e.msg + "\n")
raise SystemExit, 1
except gpsfake.PacketError, e:
sys.stderr.write("gpsfake: " + e.msg + "\n")
raise SystemExit, 1
except gpsfake.DaemonError, e:
sys.stderr.write("gpsfake: " + e.msg + "\n")
raise SystemExit, 1
except IOError, e:
if e.filename is None:
sys.stderr.write("gpsfake: unknown internal I/O error %s\n" % e)
else:
sys.stderr.write("gpsfake: no such file as %s or file unreadable\n"%e.filename)
raise SystemExit, 1
except OSError:
sys.stderr.write("gpsfake: can't open pty.\n")
raise SystemExit, 1
try:
if pipe:
test.client_add(client_init + "\n")
# Give daemon time to get ready for the feeds.
# Without a delay here there's a window for test
# sentences to arrive before the watch takes effect.
# This needs to increase if leading sentences in
# test loads aren't being processed.
time.sleep(1)
test.run()
except socket.error, msg:
sys.stderr.write("gpsfake: socket error %s.\n" % msg)
raise SystemExit, 1
except gps.client.json_error, e:
sys.stderr.write("gpsfake: JSON error on line %s is %s.\n" % (`e.data`, e.explanation))
raise SystemExit, 1
except KeyboardInterrupt:
sys.stderr.write("gpsfake: aborted\n")
raise SystemExit, 1
finally:
test.cleanup();
if progress:
baton.end()
# The following sets edit modes for GNU EMACS
# Local Variables:
# mode:python
# End:
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