Esempio n. 1
0
    def start(self):
        """Start RPD initialization process (Section 6.1 or R-PHY
        specification) Whole process is described by state machine (constructor
        of this class)

        :return:

        """
        # Get fd for terminate signals
        sfd = glibc.signalfd(-1, self.signal_mask, 0)

        # Always reset after boot
        os.environ['PC_REBOOT_HOLD'] = "FALSE"

        # Register manager's signalfd to dispatcher
        self.disp.fd_register(sfd, self.disp.EV_FD_IN, self.fd_event_handler)

        # Init RCP
        self.processes['rcp'].start(ipc_cb=self.rcp_msg_cb, sock_type=zmq.PAIR)
        call(["ifconfig", self.INTF, "up"])
        self.fsm.init_done()
        # FIXME:  delete below codes to skip dhcp procedure
        # Wait up to IF_UP_TIMEOUT for network interface to go up
        # if not self.wait_for_eth_up(Manager.IF_UP_TIMEOUT):
        #    self.fsm.fatal_failure()
        # self.fsm.if_is_up()
        self._onlog_done('')
def main():
    # Block signals so that they aren't handled
    # according to their default dispositions
    mask = sigset_t()
    fdsi = signalfd_siginfo()
    sigemptyset(mask)
    sigaddset(mask, SIGINT)
    sigaddset(mask, SIGQUIT)
    sigprocmask(SIG_BLOCK, mask, None)
    # Get a signalfd descriptor
    sfd = signalfd(-1, mask, SFD_CLOEXEC)
    # Get a epoll descriptor
    epollfd = epoll_create1(EPOLL_CLOEXEC)
    ev = epoll_event()
    ev.events = EPOLLIN
    ev.data.fd = sfd
    epoll_ctl(epollfd, EPOLL_CTL_ADD, sfd, byref(ev))
    MAX_EVENTS = 10
    events = (epoll_event * MAX_EVENTS)()
    with fdopen(sfd, 'rb', 0) as sfd_stream:
        while True:
            nfds = epoll_wait(
                epollfd, cast(byref(events), POINTER(epoll_event)),
                MAX_EVENTS, -1)
            for event_id in range(nfds):
                if events[event_id].data.fd == sfd:
                    # Read the next delivered signal
                    sfd_stream.readinto(fdsi)
                    if fdsi.ssi_signo == SIGINT:
                        print("Got SIGINT")
                    elif fdsi.ssi_signo == SIGQUIT:
                        print("Got SIGQUIT")
                        return
                    else:
                        print("Read unexpected signal")
                else:
                    raise Exception("unexpected fd?")
    close(sfd)
    close(epollfd)
Esempio n. 3
0
def main():
    # Block signals so that they aren't handled
    # according to their default dispositions
    mask = sigset_t()
    fdsi = signalfd_siginfo()
    sigemptyset(mask)
    sigaddset(mask, SIGINT)
    sigaddset(mask, SIGQUIT)
    sigprocmask(SIG_BLOCK, mask, None)
    # Get a signalfd descriptor
    sfd = signalfd(-1, mask, 0)
    with fdopen(sfd, 'rb', 0) as sfd_stream:
        while True:
            # Read the next delivered signal
            sfd_stream.readinto(fdsi)
            if fdsi.ssi_signo == SIGINT:
                print("Got SIGINT")
            elif fdsi.ssi_signo == SIGQUIT:
                print("Got SIGQUIT")
                return
            else:
                print("Read unexpected signal")
Esempio n. 4
0
def main():
    # Block signals so that they aren't handled
    # according to their default dispositions
    mask = sigset_t()
    fdsi = signalfd_siginfo()
    sigemptyset(mask)
    sigaddset(mask, SIGINT)
    sigaddset(mask, SIGQUIT)
    sigaddset(mask, SIGCHLD)
    sigaddset(mask, SIGPIPE)
    print("Blocking signals")
    sigprocmask(SIG_BLOCK, mask, None)
    # Get a signalfd descriptor
    sfd = signalfd(-1, mask, SFD_CLOEXEC | SFD_NONBLOCK)
    print("Got signalfd", sfd)
    # Get a epoll descriptor
    ep = epoll()
    print("Got epollfd", ep.fileno())
    print("Adding signalfd fd {} to epoll".format(sfd))
    ep.register(sfd, EPOLLIN)
    # Get two pair of pipes, one for stdout and one for stderr
    stdout_pair = (c_int * 2)()
    pipe2(byref(stdout_pair), O_CLOEXEC | O_NONBLOCK)
    print("Got stdout pipe pair", stdout_pair[0], stdout_pair[1])
    print("Adding pipe fd {} to epoll".format(stdout_pair[0]))
    ep.register(stdout_pair[0], EPOLLIN)
    stderr_pair = (c_int * 2)()
    pipe2(byref(stderr_pair), O_CLOEXEC | O_NONBLOCK)
    print("Got stderr pipe pair", stderr_pair[0], stderr_pair[1])
    print("Adding pipe fd {} to epoll".format(stdout_pair[0]))
    ep.register(stderr_pair[0], EPOLLIN)
    prog = argv[1:]
    if not prog:
        prog = ['echo', 'usage: demo.py PROG [ARGS]']
    print("Going to start program:", prog)
    # Fork :-)
    pid = fork()
    if pid == 0:  # Child.
        # NOTE: we are not closing any of the pipe ends. Why? Because they are
        # all O_CLOEXEC and will thus not live across the execlp call down
        # below.
        dup3(stdout_pair[1], 1, 0)
        dup3(stderr_pair[1], 2, 0)
        execlp(prog[0], *prog)
        return -1
    else:
        close(stdout_pair[1])
        close(stderr_pair[1])
    with fdopen(sfd, 'rb', 0) as sfd_stream:
        waiting_for = set(['stdout', 'stderr', 'proc'])
        while waiting_for:
            print("Waiting for events...", ' '.join(waiting_for), flush=True)
            event_list = ep.poll(maxevents=10)
            print("epoll_wait() read {} events".format(len(event_list)))
            for fd, events in event_list:
                print("[event]")
                event_bits = []
                if events & EPOLLIN == EPOLLIN:
                    event_bits.append('EPOLLIN')
                if events & EPOLLOUT == EPOLLOUT:
                    event_bits.append('EPOLLOUT')
                if events & EPOLLRDHUP == EPOLLRDHUP:
                    event_bits.append('EPOLLRDHUP')
                if events & EPOLLPRI == EPOLLPRI:
                    event_bits.append('EPOLLPRI')
                if events & EPOLLERR == EPOLLERR:
                    event_bits.append('EPOLLERR')
                if events & EPOLLHUP == EPOLLHUP:
                    event_bits.append('EPOLLHUP')
                if fd == sfd:
                    fd_name = 'signalfd()'
                elif fd == stdout_pair[0]:
                    fd_name = 'stdout pipe2()'
                elif fd == stderr_pair[0]:
                    fd_name = 'stderr pipe2()'
                else:
                    fd_name = "???"
                print(" events: {} ({})".format(
                    events, ' | '.join(event_bits)))
                print(" fd: {} ({})".format(fd, fd_name))
                if fd == sfd:
                    print("signalfd() descriptor ready")
                    if events & EPOLLIN:
                        print("Reading data from signalfd()...")
                        # Read the next delivered signal
                        sfd_stream.readinto(fdsi)
                        if fdsi.ssi_signo == SIGINT:
                            print("Got SIGINT")
                        elif fdsi.ssi_signo == SIGQUIT:
                            print("Got SIGQUIT")
                            raise SystemExit("exiting prematurly")
                        elif fdsi.ssi_signo == SIGCHLD:
                            print("Got SIGCHLD")
                            waitid_result = waitid(
                                P_PID, pid,
                                WNOHANG |
                                WEXITED | WSTOPPED | WCONTINUED |
                                WUNTRACED)
                            if waitid_result is None:
                                print("child not ready")
                            else:
                                print("child event")
                                print("si_pid:", waitid_result.si_pid)
                                print("si_uid:", waitid_result.si_uid)
                                print("si_signo:", waitid_result.si_signo)
                                assert waitid_result.si_signo == SIGCHLD
                                print("si_status:", waitid_result.si_status)
                                print("si_code:", waitid_result.si_code)
                                if waitid_result.si_code == CLD_EXITED:
                                    # assert WIFEXITED(waitid_result.si_status)
                                    print("child exited normally")
                                    print("exit code:",
                                          WEXITSTATUS(waitid_result.si_status))
                                    waiting_for.remove('proc')
                                    if 'stdout' in waiting_for:
                                        ep.unregister(stdout_pair[0])
                                        close(stdout_pair[0])
                                        waiting_for.remove('stdout')
                                    if 'stderr' in waiting_for:
                                        ep.unregister(stderr_pair[0])
                                        close(stderr_pair[0])
                                        waiting_for.remove('stderr')
                                elif waitid_result.si_code == CLD_KILLED:
                                    assert WIFSIGNALED(waitid_result.si_status)
                                    print("child was killed by signal")
                                    print("death signal:",
                                          waitid_result.si_status)
                                    waiting_for.remove('proc')
                                elif waitid_result.si_code == CLD_DUMPED:
                                    assert WIFSIGNALED(waitid_result.si_status)
                                    print("core:",
                                          WCOREDUMP(waitid_result.si_status))
                                elif waitid_result.si_code == CLD_STOPPED:
                                    print("child was stopped")
                                    print("stop signal:",
                                          waitid_result.si_status)
                                elif waitid_result.si_code == CLD_TRAPPED:
                                    print("child was trapped")
                                    # TODO: we could explore trap stuff here
                                elif waitid_result.si_code == CLD_CONTINUED:
                                    print("child was continued")
                                else:
                                    raise SystemExit(
                                        "Unknown CLD_ code: {}".format(
                                            waitid_result.si_code))
                        elif fdsi.ssi_signo == SIGPIPE:
                            print("Got SIGPIPE")
                        else:
                            print("Read unexpected signal: {}".format(
                                fdsi.ssi_signo))
                elif fd == stdout_pair[0]:
                    print("pipe() (stdout) descriptor ready")
                    if events & EPOLLIN:
                        print("Reading data from stdout...")
                        data = read(stdout_pair[0], PIPE_BUF)
                        print("Read {} bytes from stdout".format(len(data)))
                        print(data)
                    if events & EPOLLHUP:
                        print("Removing stdout pipe from epoll")
                        ep.unregister(stdout_pair[0])
                        print("Closing stdout pipe")
                        close(stdout_pair[0])
                        waiting_for.remove('stdout')
                elif fd == stderr_pair[0]:
                    print("pipe() (stderr) descriptor ready")
                    if events & EPOLLIN:
                        print("Reading data from stdout...")
                        data = read(stderr_pair[0], PIPE_BUF)
                        print("Read {} bytes from stderr".format(len(data)))
                        print(data)
                    if events & EPOLLHUP:
                        print("Removing stderr pipe from epoll")
                        ep.unregister(stderr_pair[0])
                        print("Closing stderr pipe")
                        close(stderr_pair[0])
                        waiting_for.remove('stderr')
                else:
                    # FIXME: we are still getting weird activation events on fd
                    # 0 (stdin) with events == 0 (nothing). I cannot explain
                    # this yet.
                    print("Unexpected descriptor ready:", fd)
    assert not waiting_for
    print("Closing", ep)
    ep.close()
    print("Unblocking signals")
    sigprocmask(SIG_UNBLOCK, mask, None)
    print("Exiting normally")
Esempio n. 5
0
#!/usr/bin/env python
"""
signalfd(2) demo, see the manual page of signalfd(2) for the equivalent C-code
"""
from __future__ import print_function
from __future__ import absolute_import

from signal import SIGINT, SIGQUIT
from os import fdopen

from glibc import (
    SIG_BLOCK,
    sigset_t, signalfd_siginfo,
    sigemptyset, sigaddset, sigprocmask, signalfd,
)


def main():
    # Block signals so that they aren't handled
    # according to their default dispositions
    mask = sigset_t()
    fdsi = signalfd_siginfo()
    sigemptyset(mask)
    sigaddset(mask, SIGINT)
    sigaddset(mask, SIGQUIT)
    sigprocmask(SIG_BLOCK, mask, None)
    # Get a signalfd descriptor
    sfd = signalfd(-1, mask, 0)
    with fdopen(sfd, 'rb', 0) as sfd_stream:
        while True:
            # Read the next delivered signal