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# Copyright 2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
import signal
import traceback
import portage
from portage import os
from _emerge.SpawnProcess import SpawnProcess
class ForkProcess(SpawnProcess):
__slots__ = ()
def _spawn(self, args, fd_pipes=None, **kwargs):
"""
Fork a subprocess, apply local settings, and call fetch().
"""
pid = os.fork()
if pid != 0:
if not isinstance(pid, int):
raise AssertionError(
"fork returned non-integer: %s" % (repr(pid),))
portage.process.spawned_pids.append(pid)
return [pid]
rval = 1
try:
# Use default signal handlers in order to avoid problems
# killing subprocesses as reported in bug #353239.
signal.signal(signal.SIGINT, signal.SIG_DFL)
signal.signal(signal.SIGTERM, signal.SIG_DFL)
portage.locks._close_fds()
# We don't exec, so use close_fds=False
# (see _setup_pipes docstring).
portage.process._setup_pipes(fd_pipes, close_fds=False)
rval = self._run()
except SystemExit:
raise
except:
traceback.print_exc()
finally:
# Call os._exit() from finally block, in order to suppress any
# finally blocks from earlier in the call stack. See bug #345289.
os._exit(rval)
def _run(self):
raise NotImplementedError(self)
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