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Pulseaudio: Wait on child processes to avoid zombies

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subprocess.Popen() does not implicitly wait() on the child process.
This leads to transient zombie pactl processes which are only reaped
as new processes are spawned.

Use synchronous subprocess communication to collect child process
return codes immediately and allow them to exit.
This commit is contained in:
Jay Cornwall 2016-07-31 15:17:49 -05:00
parent 40b9283840
commit 91fae807ed
1 changed files with 9 additions and 12 deletions
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21
i3pystatus/pulseaudio/__init__.py
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@ -90,9 +90,8 @@ class PulseAudio(Module, ColorRangeModule):
@property
def sink(self):
self.sinks = subprocess.Popen(['pactl', 'list', 'short', 'sinks'],
stdout=subprocess.PIPE,
universal_newlines=True).stdout.read().splitlines()
self.sinks = subprocess.check_output(['pactl', 'list', 'short', 'sinks'],
universal_newlines=True).splitlines()
bestsink = None
state = 'DEFAULT'
for sink in self.sinks:
@ -184,20 +183,18 @@ class PulseAudio(Module, ColorRangeModule):
sinks = list(s.split()[1] for s in self.sinks)
next_sink = (sinks.index(curr_sink) + 1) % len(sinks)
sink_inputs = subprocess.Popen("pacmd list-sink-inputs".split(),
stdout=subprocess.PIPE,
universal_newlines=True).stdout.read()
sink_inputs = subprocess.check_output("pacmd list-sink-inputs".split(),
universal_newlines=True)
for input_index in re.findall('index:\s+(\d+)', sink_inputs):
command = "pacmd move-sink-input {} {}".format(input_index, sinks[next_sink])
subprocess.Popen(command.split(),
stdout=subprocess.PIPE)
subprocess.Popen("pacmd set-default-sink {}".format(sinks[next_sink]).split())
subprocess.call(command.split())
subprocess.call("pacmd set-default-sink {}".format(sinks[next_sink]).split())
def switch_mute(self):
subprocess.Popen(['pactl', 'set-sink-mute', self.sink, "toggle"])
subprocess.call(['pactl', 'set-sink-mute', self.sink, "toggle"])
def increase_volume(self):
subprocess.Popen(['pactl', 'set-sink-volume', self.sink, "+%s%%" % self.step])
subprocess.call(['pactl', 'set-sink-volume', self.sink, "+%s%%" % self.step])
def decrease_volume(self):
subprocess.Popen(['pactl', 'set-sink-volume', self.sink, "-%s%%" % self.step])
subprocess.call(['pactl', 'set-sink-volume', self.sink, "-%s%%" % self.step])