Python fcntl.fcntl() Examples
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Example #1
Source File: wspbus.py From cherrypy with BSD 3-Clause "New" or "Revised" License | 7 votes |
def _set_cloexec(self): """Set the CLOEXEC flag on all open files (except stdin/out/err). If self.max_cloexec_files is an integer (the default), then on platforms which support it, it represents the max open files setting for the operating system. This function will be called just before the process is restarted via os.execv() to prevent open files from persisting into the new process. Set self.max_cloexec_files to 0 to disable this behavior. """ for fd in range(3, self.max_cloexec_files): # skip stdin/out/err try: flags = fcntl.fcntl(fd, fcntl.F_GETFD) except IOError: continue fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
Example #2
Source File: readchar.py From marker with MIT License | 6 votes |
def read_char_no_blocking(): ''' Read a character in nonblocking mode, if no characters are present in the buffer, return an empty string ''' fd = sys.stdin.fileno() old_settings = termios.tcgetattr(fd) old_flags = fcntl.fcntl(fd, fcntl.F_GETFL) try: tty.setraw(fd, termios.TCSADRAIN) fcntl.fcntl(fd, fcntl.F_SETFL, old_flags | os.O_NONBLOCK) return sys.stdin.read(1) except IOError as e: ErrorNumber = e[0] # IOError with ErrorNumber 11(35 in Mac) is thrown when there is nothing to read(Resource temporarily unavailable) if (sys.platform.startswith("linux") and ErrorNumber != 11) or (sys.platform == "darwin" and ErrorNumber != 35): raise return "" finally: fcntl.fcntl(fd, fcntl.F_SETFL, old_flags) termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
Example #3
Source File: interface.py From XFLTReaT with MIT License | 6 votes |
def lin_set_ip_address(self, dev, ip, serverip, netmask): sockfd = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: # set IP ifr = struct.pack('<16sH2s4s8s', dev, socket.AF_INET, "\x00"*2, socket.inet_aton(ip), "\x00"*8) fcntl.ioctl(sockfd, self.IOCTL_LINUX_SIOCSIFADDR, ifr) # get flags ifr = struct.pack('<16sh', dev, 0) flags = struct.unpack('<16sh', fcntl.ioctl(sockfd, self.IOCTL_LINUX_SIOCSIFFLAGS, ifr))[1] # set new flags flags = flags | self.IOCTL_LINUX_IFF_UP ifr = struct.pack('<16sh', dev, flags) # iface up fcntl.ioctl(sockfd, self.IOCTL_LINUX_SIOCSIFFLAGS, ifr) except Exception as e: common.internal_print("Something went wrong with setting up the interface.", -1) print(e) sys.exit(-1) # adding new route for forwarding packets properly. integer_ip = struct.unpack(">I", socket.inet_pton(socket.AF_INET, serverip))[0] rangeip = socket.inet_ntop(socket.AF_INET, struct.pack(">I", integer_ip & ((2**int(netmask))-1)<<32-int(netmask))) integer_netmask = struct.pack(">I", ((2**int(netmask))-1)<<32-int(netmask)) netmask = socket.inet_ntoa(integer_netmask) ps = subprocess.Popen(["route", "add", "-net", rangeip, "netmask", netmask, "dev", dev], stdout=subprocess.PIPE, stderr=subprocess.PIPE) (stdout, stderr) = ps.communicate() if stderr: if not "File exists" in stderr: common.internal_print("Error: adding client route: {0}".format(stderr), -1) sys.exit(-1) return
Example #4
Source File: interface.py From XFLTReaT with MIT License | 6 votes |
def mac_set_ip_address(self, dev, ip, serverip, netmask): ifr = struct.pack('<16sBBHIIIBBHIIIBBHIII', self.iface_name, 16, socket.AF_INET, 0, struct.unpack('<L', socket.inet_pton(socket.AF_INET, ip))[0], 0, 0, 16, socket.AF_INET, 0, struct.unpack('<L', socket.inet_pton(socket.AF_INET, serverip))[0], 0, 0, 16, 0, 0, struct.unpack('<L', socket.inet_pton(socket.AF_INET, "255.255.255.255"))[0], 0, 0) try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) fcntl.ioctl(sock, self.IOCTL_MACOSX_SIOCAIFADDR, ifr) except Exception as e: common.internal_print("Something went wrong with setting up the interface.", -1) print(e) sys.exit(-1) # adding new route for forwarding packets properly. integer_ip = struct.unpack(">I", socket.inet_pton(socket.AF_INET, serverip))[0] rangeip = socket.inet_ntop(socket.AF_INET, struct.pack(">I", integer_ip & ((2**int(netmask))-1)<<32-int(netmask))) ps = subprocess.Popen(["route", "add", "-net", rangeip+"/"+netmask, serverip], stdout=subprocess.PIPE, stderr=subprocess.PIPE) (stdout, stderr) = ps.communicate() if stderr: if not "File exists" in stderr: common.internal_print("Error: adding client route: {0}".format(stderr), -1) sys.exit(-1) return
Example #5
Source File: virtio_console_guest.py From avocado-vt with GNU General Public License v2.0 | 6 votes |
def blocking(self, port, mode=False): """ Set port function mode blocking/nonblocking :param port: port to set mode :param mode: False to set nonblock mode, True for block mode """ fd = self._open([port])[0] try: fl = fcntl.fcntl(fd, fcntl.F_GETFL) if not mode: fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NONBLOCK) else: fcntl.fcntl(fd, fcntl.F_SETFL, fl & ~os.O_NONBLOCK) except Exception as inst: print("FAIL: Setting (non)blocking mode: " + str(inst)) return if mode: print("PASS: set to blocking mode") else: print("PASS: set to nonblocking mode")
Example #6
Source File: cli.py From HyperGAN with MIT License | 6 votes |
def train(self): i=0 if(self.args.ipython): import fcntl fd = sys.stdin.fileno() fl = fcntl.fcntl(fd, fcntl.F_GETFL) fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NONBLOCK) while((i < self.total_steps or self.total_steps == -1) and not self.gan.destroy): i+=1 start_time = time.time() self.step() GlobalViewer.tick() if (self.args.save_every != None and self.args.save_every != -1 and self.args.save_every > 0 and i % self.args.save_every == 0): print(" |= Saving network") self.gan.save(self.save_file) if self.args.ipython: self.check_stdin() end_time = time.time()
Example #7
Source File: interface.py From XFLTReaT with MIT License | 6 votes |
def freebsd_tun_alloc(self, dev, flags): try: sockfd = socket.socket(socket.AF_INET, socket.SOCK_STREAM) ifr = struct.pack('<16si', 'tun', 0) self.iface_name = fcntl.ioctl(sockfd, self.IOCTL_FREEBSD_SIOCIFCREATE2, ifr) self.iface_name = self.iface_name.rstrip("\x00") buff = array.array('c', dev+"\x00") caddr_t, _ = buff.buffer_info() ifr = struct.pack('16sP', self.iface_name, caddr_t); fcntl.ioctl(sockfd, self.IOCTL_FREEBSD_SIOCSIFNAME, ifr) tun = os.open("/dev/"+self.iface_name, os.O_RDWR | os.O_NONBLOCK) self.iface_name = dev except IOError as e: print e common.internal_print("Error: Cannot create tunnel. Is {0} in use?".format(dev), -1) sys.exit(-1) return tun
Example #8
Source File: interface.py From XFLTReaT with MIT License | 6 votes |
def freebsd_set_ip_address(self, dev, ip, serverip, netmask): sockfd = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: #set ip, serverip and netmask ifaliasreq = struct.pack('<16sBBHI8sBBHI8sBBHI8sI', self.iface_name, 16, socket.AF_INET, 0, struct.unpack('<I', socket.inet_aton(ip))[0], '\x00'*8, 16, socket.AF_INET, 0, struct.unpack('<I', socket.inet_aton(serverip))[0], '\x00'*8, 16, socket.AF_INET, 0, struct.unpack('<I', socket.inet_aton('255.255.255.255'))[0], '\x00'*8, 0) fcntl.ioctl(sockfd, self.IOCTL_FREEBSD_SIOCAIFADDR, ifaliasreq) # get flags ifr = struct.pack('<16sh', self.iface_name, 0) flags = struct.unpack('<16sh', fcntl.ioctl(sockfd, self.IOCTL_FREEBSD_SIOCGIFFLAGS, ifr))[1] # set new flags flags = flags | self.IOCTL_FREEBSD_IFF_UP ifr = struct.pack('<16sh', self.iface_name, flags) # iface up fcntl.ioctl(sockfd, self.IOCTL_FREEBSD_SIOCSIFFLAGS, ifr) except Exception as e: common.internal_print("Something went wrong with setting up the interface.", -1) print(e) sys.exit(-1) # adding new route for forwarding packets properly. integer_ip = struct.unpack(">I", socket.inet_pton(socket.AF_INET, serverip))[0] rangeip = socket.inet_ntop(socket.AF_INET, struct.pack(">I", integer_ip & ((2**int(netmask))-1)<<32-int(netmask))) ps = subprocess.Popen(["route", "add", "-net", rangeip+"/"+netmask, serverip], stdout=subprocess.PIPE, stderr=subprocess.PIPE) (stdout, stderr) = ps.communicate() if stderr: if not "File exists" in stderr: common.internal_print("Error: adding client route: {0}".format(stderr), -1) sys.exit(-1) return
Example #9
Source File: tempfile.py From Computable with MIT License | 5 votes |
def _set_cloexec(fd): try: flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0) except IOError: pass else: # flags read successfully, modify flags |= _fcntl.FD_CLOEXEC _fcntl.fcntl(fd, _fcntl.F_SETFD, flags)
Example #10
Source File: wsgiserver2.py From SalesforceXyTools with Apache License 2.0 | 5 votes |
def prevent_socket_inheritance(sock): """Mark the given socket fd as non-inheritable (POSIX).""" fd = sock.fileno() old_flags = fcntl.fcntl(fd, fcntl.F_GETFD) fcntl.fcntl(fd, fcntl.F_SETFD, old_flags | fcntl.FD_CLOEXEC)
Example #11
Source File: _scons_subprocess.py From web2board with GNU Lesser General Public License v3.0 | 5 votes |
def _set_cloexec_flag(self, fd): try: cloexec_flag = fcntl.FD_CLOEXEC except AttributeError: cloexec_flag = 1 old = fcntl.fcntl(fd, fcntl.F_GETFD) fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag)
Example #12
Source File: posix.py From vnpy_crypto with MIT License | 5 votes |
def set_close_exec(fd): flags = fcntl.fcntl(fd, fcntl.F_GETFD) fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
Example #13
Source File: posix.py From vnpy_crypto with MIT License | 5 votes |
def _set_nonblocking(fd): flags = fcntl.fcntl(fd, fcntl.F_GETFL) fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
Example #14
Source File: posix.py From opendevops with GNU General Public License v3.0 | 5 votes |
def _set_nonblocking(fd: int) -> None: flags = fcntl.fcntl(fd, fcntl.F_GETFL) fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
Example #15
Source File: asyncore.py From BinderFilter with MIT License | 5 votes |
def __init__(self, fd, map=None): dispatcher.__init__(self, None, map) self.connected = True try: fd = fd.fileno() except AttributeError: pass self.set_file(fd) # set it to non-blocking mode flags = fcntl.fcntl(fd, fcntl.F_GETFL, 0) flags = flags | os.O_NONBLOCK fcntl.fcntl(fd, fcntl.F_SETFL, flags)
Example #16
Source File: posixfile.py From BinderFilter with MIT License | 5 votes |
def flags(self, *which): import fcntl, os if which: if len(which) > 1: raise TypeError, 'Too many arguments' which = which[0] else: which = '?' l_flags = 0 if 'n' in which: l_flags = l_flags | os.O_NDELAY if 'a' in which: l_flags = l_flags | os.O_APPEND if 's' in which: l_flags = l_flags | os.O_SYNC file = self._file_ if '=' not in which: cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0) if '!' in which: l_flags = cur_fl & ~ l_flags else: l_flags = cur_fl | l_flags l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags) if 'c' in which: arg = ('!' not in which) # 0 is don't, 1 is do close on exec l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg) if '?' in which: which = '' # Return current flags l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0) if os.O_APPEND & l_flags: which = which + 'a' if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1: which = which + 'c' if os.O_NDELAY & l_flags: which = which + 'n' if os.O_SYNC & l_flags: which = which + 's' return which
Example #17
Source File: test_io.py From BinderFilter with MIT License | 5 votes |
def _set_non_blocking(self, fd): flags = fcntl.fcntl(fd, fcntl.F_GETFL) self.assertNotEqual(flags, -1) res = fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK) self.assertEqual(res, 0)
Example #18
Source File: piku.py From piku with MIT License | 5 votes |
def cmd_run(app, cmd): """e.g.: piku run <app> ls -- -al""" app = exit_if_invalid(app) config_file = join(ENV_ROOT, app, 'LIVE_ENV') environ.update(parse_settings(config_file)) for f in [stdout, stderr]: fl = fcntl(f, F_GETFL) fcntl(f, F_SETFL, fl | O_NONBLOCK) p = Popen(' '.join(cmd), stdin=stdin, stdout=stdout, stderr=stderr, env=environ, cwd=join(APP_ROOT, app), shell=True) p.communicate()
Example #19
Source File: posix.py From Computable with MIT License | 5 votes |
def _set_nonblocking(fd): flags = fcntl.fcntl(fd, fcntl.F_GETFL) fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
Example #20
Source File: wsgiserver2.py From SalesforceXyTools with Apache License 2.0 | 5 votes |
def prevent_socket_inheritance(sock): """Dummy function, since neither fcntl nor ctypes are available.""" pass
Example #21
Source File: wsgiserver3.py From SalesforceXyTools with Apache License 2.0 | 5 votes |
def prevent_socket_inheritance(sock): """Mark the given socket fd as non-inheritable (POSIX).""" fd = sock.fileno() old_flags = fcntl.fcntl(fd, fcntl.F_GETFD) fcntl.fcntl(fd, fcntl.F_SETFD, old_flags | fcntl.FD_CLOEXEC)
Example #22
Source File: wsgiserver3.py From SalesforceXyTools with Apache License 2.0 | 5 votes |
def prevent_socket_inheritance(sock): """Dummy function, since neither fcntl nor ctypes are available.""" pass
Example #23
Source File: __init__.py From nightmare with GNU General Public License v2.0 | 5 votes |
def prevent_socket_inheritance(sock): """Dummy function, since neither fcntl nor ctypes are available.""" pass
Example #24
Source File: posix.py From opendevops with GNU General Public License v3.0 | 5 votes |
def set_close_exec(fd: int) -> None: flags = fcntl.fcntl(fd, fcntl.F_GETFD) fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
Example #25
Source File: test_io.py From ironpython2 with Apache License 2.0 | 5 votes |
def _set_non_blocking(self, fd): flags = fcntl.fcntl(fd, fcntl.F_GETFL) self.assertNotEqual(flags, -1) res = fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK) self.assertEqual(res, 0)
Example #26
Source File: posixfile.py From ironpython2 with Apache License 2.0 | 5 votes |
def flags(self, *which): import fcntl, os if which: if len(which) > 1: raise TypeError, 'Too many arguments' which = which[0] else: which = '?' l_flags = 0 if 'n' in which: l_flags = l_flags | os.O_NDELAY if 'a' in which: l_flags = l_flags | os.O_APPEND if 's' in which: l_flags = l_flags | os.O_SYNC file = self._file_ if '=' not in which: cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0) if '!' in which: l_flags = cur_fl & ~ l_flags else: l_flags = cur_fl | l_flags l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags) if 'c' in which: arg = ('!' not in which) # 0 is don't, 1 is do close on exec l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg) if '?' in which: which = '' # Return current flags l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0) if os.O_APPEND & l_flags: which = which + 'a' if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1: which = which + 'c' if os.O_NDELAY & l_flags: which = which + 'n' if os.O_SYNC & l_flags: which = which + 's' return which
Example #27
Source File: asyncore.py From ironpython2 with Apache License 2.0 | 5 votes |
def __init__(self, fd, map=None): dispatcher.__init__(self, None, map) self.connected = True try: fd = fd.fileno() except AttributeError: pass self.set_file(fd) # set it to non-blocking mode flags = fcntl.fcntl(fd, fcntl.F_GETFL, 0) flags = flags | os.O_NONBLOCK fcntl.fcntl(fd, fcntl.F_SETFL, flags)
Example #28
Source File: subprocess.py From ironpython2 with Apache License 2.0 | 5 votes |
def _set_cloexec_flag(self, fd, cloexec=True): try: cloexec_flag = fcntl.FD_CLOEXEC except AttributeError: cloexec_flag = 1 old = fcntl.fcntl(fd, fcntl.F_GETFD) if cloexec: fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag) else: fcntl.fcntl(fd, fcntl.F_SETFD, old & ~cloexec_flag)
Example #29
Source File: SimpleXMLRPCServer.py From ironpython2 with Apache License 2.0 | 5 votes |
def __init__(self, addr, requestHandler=SimpleXMLRPCRequestHandler, logRequests=True, allow_none=False, encoding=None, bind_and_activate=True): self.logRequests = logRequests SimpleXMLRPCDispatcher.__init__(self, allow_none, encoding) SocketServer.TCPServer.__init__(self, addr, requestHandler, bind_and_activate) # [Bug #1222790] If possible, set close-on-exec flag; if a # method spawns a subprocess, the subprocess shouldn't have # the listening socket open. if fcntl is not None and hasattr(fcntl, 'FD_CLOEXEC'): flags = fcntl.fcntl(self.fileno(), fcntl.F_GETFD) flags |= fcntl.FD_CLOEXEC fcntl.fcntl(self.fileno(), fcntl.F_SETFD, flags)
Example #30
Source File: tempfile.py From ironpython2 with Apache License 2.0 | 5 votes |
def _set_cloexec(fd): try: flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0) except IOError: pass else: # flags read successfully, modify flags |= _fcntl.FD_CLOEXEC _fcntl.fcntl(fd, _fcntl.F_SETFD, flags)