Initial commit

utils.py

@@ -0,0 +1,74 @@
+from traceback import print_exception
+from sys import exc_info, byteorder
+import platform
+import os
+import struct
+import subprocess
+import urllib
+
+HIGHEST_PORT = 65535
+
+class HostnameNotChangedError(PermissionError):
+	def __init__(self):
+		super(PermissionError, self).__init__("hostname could not be changed")
+
+class NotSupportedOnPlatform(OSError):
+	def __init__(self):
+		super(OSError, self).__init__("feature not avaliable on OS")
+
+class PlaybackFailure(OSError):
+	def __init__(self):
+		super(OSError, self).__init__("audio playback failed")
+
+
+def is_wallaby():
+	return "3.18.21-custom" in platform.uname().release
+
+
+def is_linux():
+	return platform.uname().system == "Linux"
+
+
+def is_darwin():
+	return platform.uname().system == "Darwin"
+
+
+def is_windows():
+	return platform.uname().system == "Windows"
+
+
+def set_hostname(hostname):
+	if is_linux():
+		if os.geteuid() == 0:
+			open("/etc/hostname", "w").write(hostname)
+		else:
+			raise HostnameNotChangedError()
+	elif is_darwin():
+		if os.geteuid() == 0:
+			subprocess.check_call(["scutil", "--set", "HostName", hostname])
+		else:
+			raise HostnameNotChangedError()
+	else:
+		raise HostnameNotChangedError()
+
+
+def get_hostname():
+	return platform.uname().node
+
+
+def get_ip_from_url(url):
+	return urllib.parse.urlsplit(url).netloc.split(':')[0]
+
+
+def play_sound(path):
+	if is_linux() or is_darwin():
+		try:
+			subprocess.check_call(["aplay" if is_linux() else "afplay", path])
+		except subprocess.CalledProcessError as e:
+			raise PlaybackFailure()
+	else:
+		raise NotSupportedOnPlatform()
+
+
+def valid_port(port):
+	return type(port) is int and port <= HIGHEST_PORT