/usr/bin/gpsfake is in python-gps 3.17-5.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
# gpsfake -- test harness for gpsd
#
# Simulates one or more GPSes, playing back logfiles.
# 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.
# This code runs compatibly under Python 2 and 3.x for x >= 2.
# Preserve this property!
from __future__ import absolute_import, print_function, division
import getopt
import os
import platform
import pty
import socket
import sys
import time
import gps
import gps.fake as gpsfake # The "as" pacifies pychecker
try:
my_input = raw_input
except NameError:
my_input = input
# Get version of stdout for bytes data (NOP in Python 2)
bytesout = gps.get_bytes_stream(sys.stdout)
class Baton(object):
"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(" \b")
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("\b")
self.stream.flush()
self.count = self.count + 1
return
def end(self, msg=None):
if msg is None:
msg = self.endmsg
if self.stream:
self.stream.write("...(%2.2f sec) %s.\n"
% (time.time() - self.time, msg))
return
def hexdump(s):
rep = ""
for c in s:
rep += "%02x" % ord(c)
return rep
def fakehook(linenumber, fakegps):
if len(fakegps.testload.sentences) == 0:
sys.stderr.write("fakegps: no sentences in test load.\n")
raise SystemExit(1)
if linenumber % len(fakegps.testload.sentences) == 0:
if singleshot and linenumber > 0:
return False
if progress:
baton.twirl('*\b')
elif not singleshot:
if not quiet:
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:
my_input(announce + "? ")
else:
print(announce)
if progress:
baton.twirl()
return True
if __name__ == '__main__':
try:
(options, arguments) = getopt.getopt(sys.argv[1:],
"1bc:D:ghilm:no:pP:qr:s:StTuvx")
except getopt.GetoptError as msg:
print("gpsfake: " + str(msg))
raise SystemExit(1)
port = None
progress = False
cycle = 0.0
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
slow = False
quiet = False
for (switch, val) in options:
if switch == '-1':
singleshot = True
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 == '-q':
quiet = True
elif switch == '-r':
client_init = val
elif switch == '-s':
speed = int(val)
elif switch == '-S':
slow = True
elif switch == '-t':
tcp = True
elif switch == '-T':
sys.stdout.write("sys %s platform %s: WRITE_PAD = %.5f\n"
% (sys.platform, platform.platform(),
gpsfake.GetDelay(slow)))
raise SystemExit(0)
elif switch == '-u':
udp = True
elif switch == '-v':
verbose += 1
elif switch == '-h':
sys.stderr.write("usage: gpsfake"
" [-1] [-h] [-i] [-l] [-g] [-q] [-m monitor]"
" [-D debug] [-n] [-o options] [-p]\n"
"\t[-P port] [-r initcmd] [-t] [-T] [-v] [-x]"
" [-s speed] [-S] [-c cycle] [-b] logfile...\n")
raise SystemExit(0)
try:
pty.openpty()
except (AttributeError, OSError):
sys.stderr.write("gpsfake: ptys not available, falling back to UDP.\n")
udp = True
if not arguments:
sys.stderr.write("gpsfake: requires at least one logfile argument.\n")
raise SystemExit(1)
if progress:
baton = Baton("Processing %s" % ",".join(arguments), "done")
elif not quiet:
sys.stderr.write("Processing %s\n" % ",".join(arguments))
# Don't allocate a private port when cycling logs for client testing.
if port is None and not pipe:
port = int(gps.GPSD_PORT)
test = gpsfake.TestSession(prefix=monitor, port=port, options=doptions,
tcp=tcp, udp=udp, verbose=verbose,
predump=predump, slow=slow)
if pipe:
test.reporter = bytesout.write
if verbose:
progress = False
test.progress = sys.stderr.write
test.spawn()
try:
for logfile in arguments:
try:
test.gps_add(logfile, speed=speed, pred=fakehook,
oneshot=singleshot)
except gpsfake.TestLoadError as e:
sys.stderr.write("gpsfake: " + e.msg + "\n")
raise SystemExit(1)
except gpsfake.PacketError as e:
sys.stderr.write("gpsfake: " + e.msg + "\n")
raise SystemExit(1)
except gpsfake.DaemonError as e:
sys.stderr.write("gpsfake: " + e.msg + "\n")
raise SystemExit(1)
except IOError as 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.
# Until the ISYNC driver was introduced, 1 sec was
# sufficient here. The extra 0.4s allows for the
# additional two 200ms delays introduced by the
# calls to gpsd_set_speed() in isync_detect()
time.sleep(1.4)
test.run()
except socket.error as msg:
sys.stderr.write("gpsfake: socket error %s.\n" % msg)
raise SystemExit(1)
except gps.client.json_error as e:
sys.stderr.write("gpsfake: JSON error on line %s is %s.\n"
% (repr(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()
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# mode:python
# End:
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