Use open() instead of file() to open files

file() has been removed in Python3. Also, drop buffering=0 from
the call - it doesn't work in text mode in Python3.

libexec/defirqaffinity.py

@@ -41,9 +41,8 @@ def parse_def_affinity(fname):
 	if os.getuid() != 0:
 		return
 	try:
-		f = file(fname)
-		line = f.readline()
-		f.close()
+		with open(fname, 'r') as f:
+			line = f.readline()
 		return bitmasklist(line)
 	except IOError:
 		return [ 0 ]

libexec/pmqos-static.py

@@ -40,12 +40,10 @@ def do_fork():
 		sys.exit(0)
 
 def close_fds():
-	s_in = file('/dev/null', 'r')
-	s_out = file('/dev/null', 'a+')
-	s_err = file('/dev/null', 'a+', 0)
-	os.dup2(s_in.fileno(), sys.stdin.fileno())
-	os.dup2(s_out.fileno(), sys.stdout.fileno())
-	os.dup2(s_err.fileno(), sys.stderr.fileno())
+	f = open('/dev/null', 'w+')
+	os.dup2(f.fileno(), sys.stdin.fileno())
+	os.dup2(f.fileno(), sys.stdout.fileno())
+	os.dup2(f.fileno(), sys.stderr.fileno())
 
 def write_pidfile():
 	with os.fdopen(os.open(PIDFILE, os.O_CREAT | os.O_TRUNC | os.O_WRONLY, 0o644), "w") as f:

tuned/daemon/application.py

@@ -139,12 +139,10 @@ class Application(object):
 			os.close(child_out_fd)
 			raise TunedException("Cannot daemonize, second fork() failed.")
 
-		si = file("/dev/null", "r")
-		so = file("/dev/null", "a+")
-		se = file("/dev/null", "a+", 0)
-		os.dup2(si.fileno(), sys.stdin.fileno())
-		os.dup2(so.fileno(), sys.stdout.fileno())
-		os.dup2(se.fileno(), sys.stderr.fileno())
+		fd = open("/dev/null", "w+")
+		os.dup2(fd.fileno(), sys.stdin.fileno())
+		os.dup2(fd.fileno(), sys.stdout.fileno())
+		os.dup2(fd.fileno(), sys.stderr.fileno())
 
 		self.write_pid_file(pid_file)