keith/mustang-midi-bridge
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Polish up framework to auto-detect Mustang

Browse source
This commit is contained in:
hirsch 2016-07-31 19:17:30 -04:00
parent 32b6bdde02
commit 45feec3d78
4 changed files with 53 additions and 48 deletions
Download patch file Download diff file Expand all files Collapse all files

84
mustang_bridge_start
View file

@ -11,7 +11,7 @@ from string import split
import usb.core
####### Start User Edits #########
rundir = "/var/run/mustang/"
# Controller USB parms
control_vid = 0x0763
@ -19,12 +19,9 @@ control_pid = 0x0160
# Mustang USB parms
mustang_vid = 0x1ed8
mustang_pids = ( 0x0004, 0x0005, 0x000a, 0x0010, 0x0012, 0x0014, 0x0016 )
# Mustang III (original)
# mustang_pid = 0x0005
# Mustang III v2
mustang_pid = 0x0016
####### Start User Edits #########
# Controller MIDI device
midi_device = 1
@ -34,44 +31,53 @@ midi_channel = 1
######## End User Edits ##########
rundir = "/var/run/mustang/"
# Look for devices
controller = usb.core.find( idVendor=control_vid, idProduct=control_pid )
mustang = usb.core.find( idVendor=mustang_vid, idProduct=mustang_pid )
controller = usb.core.find( idVendor = control_vid, idProduct = control_pid )
if ( not controller ):
sys.exit( 0 )
mustang = False
for pid in mustang_pids:
device = usb.core.find( idVendor = mustang_vid, idProduct = pid )
if ( device ):
mustang = True
break
if ( not mustang ):
sys.exit( 0 )
pid = os.getpid()
# syslog.syslog( "%d: Starting" % pid )
# was it found?
if controller and mustang:
os.chdir( rundir )
filelist = glob.glob( 'mustang_*' )
# Look for atomic pid file
os.chdir( rundir )
filelist = glob.glob( 'mustang_*' )
if len( filelist ) != 1:
syslog.syslog( "%d: /var/run/mustang is not properly setup" % pid )
sys.exit( 0 )
if len( filelist ) == 1:
lockfile = filelist[0]
oldpid = split( lockfile, '_' )[1]
# Found file. Parse out the PID of the process that created it.
lockfile = filelist[0]
oldpid = split( lockfile, '_' )[1]
# syslog.syslog( "%d: Check for path /proc/%s" % (pid, oldpid) )
if not os.path.exists( "/proc/%s" % oldpid ):
# No such process, ok to start ours
# syslog.syslog( "%d: Renaming %s to mustang_%d" % (pid, lockfile, pid) )
try:
os.rename( lockfile, "mustang_%d" % os.getpid() )
except Exception, e:
pass
# syslog.syslog( "%d: Unable to rename file" % pid )
else:
# syslog.syslog( "%d: About to exec" % pid )
# Drop privileges and start the program
pwObj = getpwnam('mustang-user')
os.setgid( pwObj.pw_gid )
# Need secondary groups to access MIDI and USB devices
sec_gids = ( getgrnam('plugdev').gr_gid, getgrnam('audio').gr_gid )
os.setgroups( sec_gids )
os.setuid( pwObj.pw_uid )
os.execl( "/usr/local/bin/mustang_midi", "mustang_midi", "%s" % midi_device, "%s" % midi_channel )
# syslog.syslog( "%d: Check for path /proc/%s" % (pid, oldpid) )
if not os.path.exists( "/proc/%s" % oldpid ):
# No such process, ok to start ours
# syslog.syslog( "%d: Renaming %s to mustang_%d" % (pid, lockfile, pid) )
try:
os.rename( lockfile, "mustang_%d" % os.getpid() )
except Exception, e:
pass
# syslog.syslog( "%d: Unable to rename file" % pid )
else:
syslog.syslog( "%d: /var/run/mustang is not properly setup" % pid )
# syslog.syslog( "%d: About to exec" % pid )
# Drop privileges and start the program
pwObj = getpwnam('mustang-user')
os.setgid( pwObj.pw_gid )
# Need secondary groups to access MIDI and USB devices
sec_gids = ( getgrnam('plugdev').gr_gid, getgrnam('audio').gr_gid )
os.setgroups( sec_gids )
os.setuid( pwObj.pw_uid )
os.execl( "/usr/local/bin/mustang_midi", "mustang_midi", "%s" % midi_device, "%s" % midi_channel )