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Diffstat (limited to 'system/gpsd/gpsd.hotplug')
| -rw-r--r-- | system/gpsd/gpsd.hotplug | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/system/gpsd/gpsd.hotplug b/system/gpsd/gpsd.hotplug deleted file mode 100644 index 805f941998..0000000000 --- a/system/gpsd/gpsd.hotplug +++ /dev/null @@ -1,124 +0,0 @@ -#!/usr/bin/python -# -# This file is Copyright (c) 2010 by the GPSD project -# BSD terms apply: see the file COPYING in the distribution root for details. -# -# Hotplug script for gpsd by Eric S. Raymond, March 2005 -# This script is part of the gpsd distribution: see http://gpsd.berlios.de -# Can be called like "gpsd.hotplug [add|remove] /dev/ttyUSB0" for test -# purposes. -import sys, time, os, syslog, glob, socket, stat - -CONTROL_SOCKET = os.getenv('GPSD_SOCKET') or "/var/run/gpsd.sock" -GPSD_OPTIONS = os.getenv('GPSD_OPTIONS') or "" - -WHEREAMI = __file__ - -def gpsd_control_connect(complain=True): - "Acquire a connection to the GPSD control socket." - if not os.path.exists(CONTROL_SOCKET): - syslog.syslog("socket %s doesn't exist" % CONTROL_SOCKET) - return None - try: - sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM, 0) - sock.connect(CONTROL_SOCKET) - except socket.error, msg: - if complain: - syslog.syslog("socket %s creation failure: %s" % (CONTROL_SOCKET, msg)) - if sock: - sock.close() - sock = None - #else: - # syslog.syslog("socket %s created OK" % CONTROL_SOCKET) - return sock - -def gpsd_control(action, argument): - "Pass a command to gpsd; start the daemon if not already running." - syslog.syslog("gpsd_control(action=%s, arg=%s)" % (action, argument)) - connect = gpsd_control_connect(complain=False) - if connect: - syslog.syslog("reached a running gpsd") - elif action == 'add': - gpsdcmd = "gpsd %s -F %s" % (GPSD_OPTIONS, CONTROL_SOCKET) - syslog.syslog("launching %s" % gpsdcmd) - os.system(gpsdcmd) - connect = gpsd_control_connect(complain=True) - if not connect: - syslog.syslog("can't reach gpsd") - return None - # We've got a live connection to the gpsd control socket. No - # need to parse the response, because gpsd will lock on to the - # device if it's really a GPS and ignore it if it's not. - if action == 'add': - # Force the group-read & group-write bits on, so gpsd will still be - # able to use this device after dropping root privileges. - os.chmod(argument, stat.S_IMODE(os.stat(argument)[stat.ST_MODE])|0660) - connect.sendall("+%s\r\n" % argument) - connect.recv(12) - elif action == 'remove': - connect.sendall("-%s\r\n" % argument) - connect.recv(12) - elif action == 'send': - connect.sendall("%s\r\n" % argument) - connect.recv(12) - connect.close() - #syslog.syslog("gpsd_control ends") - return action - -def hotplug(action, devpath): - #syslog.syslog("ACTION=%s DEVPATH=%s" % (action,devpath)) - if not devpath: - syslog.syslog("No device") - else: - subnodes = glob.glob("/sys" + devpath + "/*") - subnodes = map(os.path.basename, subnodes) - subnodes = filter(lambda s: s.startswith("ttyUSB"), subnodes) - if len(subnodes) == 0: - syslog.syslog("no ttyUSB device under " + devpath) - return - elif len(subnodes) > 1: - syslog.syslog("too many ttyUSB devices under " + devpath) - return - else: - tty = "/dev/" + subnodes[0] - - syslog.syslog("waiting for " + tty) - while not os.path.exists(tty): - time.sleep(1) - syslog.syslog(tty + " has gone active") - - gpsd_control(action, tty) - - remover = os.getenv("REMOVER") - #syslog.syslog("REMOVER=%s" % remover) - fp = open(remover, "w") - fp.write(WHEREAMI + " remove " + tty) - fp.close() - os.chmod(remover, stat.S_IRUSR|stat.S_IXUSR|stat.S_IRGRP|stat.S_IXGRP) - return - -if __name__ == '__main__': - # In recent versions of udev, the gpsd script runs in series with - # the task that creates the real /dev/ttyUSB0 device - # node. Unfortunately, the gpsd script runs BEFORE the creation of - # the node, and the node is not created until after you kill the - # gpsd script, because the gpsd script waits forever for the node - # to appear. - # - # This is a race condition, and is best fixed by running the - # actual wait/hotplug portion in the background. - pid = os.fork() - if not pid: - syslog.openlog('gpsd.hotplug', 0, syslog.LOG_DAEMON) - try: - if len(sys.argv) == 1: # Called as hotplug script - hotplug(os.getenv("ACTION"), os.getenv("DEVPATH")) - else: # Called by hand for testing - gpsd_control(sys.argv[1], sys.argv[2]) - except: - (exc_type, exc_value, exc_traceback) = sys.exc_info() - syslog.syslog("gpsd.hotplug: exception %s yields %s" % (exc_type, exc_value)) - raise exc_type, exc_value, exc_traceback - #syslog.syslog("gpsd.hotplug ends") - syslog.closelog() - |