def tcp4_to_unix(local_port, unix_path):
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM,
socket.IPPROTO_TCP)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
server.bind(('127.0.0.1', local_port))
except socket.error as e:
sys.stderr.write('remote cant grab port %d\n' % local_port)
# let other end time to connect to maintain ssh up
time.sleep(10)
sys.exit(0)
server.listen(32)
while True:
(rl, wl, el) = select.select([server], [], [server], 1)
if server in rl:
(client, _) = server.accept()
if not posix.fork():
unix = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
try:
unix.connect(unix_path)
except socket.error as e:
print 'Unable to grab %s: %s' % (unix_path, e)
pipe = FdPipe(client, client, unix, unix)
while pipe.one_loop():
pass
return
client.close()
try:
posix.waitpid(-1, posix.WNOHANG)
except OSError:
pass
def Start(self):
"""Start this process with fork(), haandling redirects."""
# TODO: If OSH were a job control shell, we might need to call some of
# these here. They control the distribution of signals, some of which
# originate from a terminal. All the processes in a pipeline should be in
# a single process group.
#
# - posix.setpgid()
# - posix.setpgrp()
# - posix.tcsetpgrp()
#
# NOTE: posix.setsid() isn't called by the shell; it's should be called by the
# login program that starts the shell.
#
# The whole job control mechanism is complicated and hacky.
pid = posix.fork()
if pid < 0:
# When does this happen?
raise RuntimeError('Fatal error in posix.fork()')
elif pid == 0: # child
for st in self.state_changes:
st.Apply()
self.thunk.Run()
# Never returns
#log('STARTED process %s, pid = %d', self, pid)
# Invariant, after the process is started, it stores its PID.
self.pid = pid
return pid
def execute_command():
pipe_fd = posix.pipe()
pid = posix.fork()
if pid == 0:
cmdline = ["lsblk"]
if check_fs_val.get() or check_UUID_val.get():
cmdline.append("-o")
col = "+"
if check_fs_val.get():
col += "fstype"
if check_fs_val.get() and check_UUID_val.get():
col += ","
if check_UUID_val.get():
col += "UUID"
cmdline.append(col)
posix.dup2(pipe_fd[1], 1)
posix.close(pipe_fd[0])
posix.close(pipe_fd[1])
posix.execv("/bin/lsblk", cmdline)
quit()
else:
posix.close(pipe_fd[1])
ret = bytearray()
readbytes = posix.read(pipe_fd[0], 1000)
while readbytes != b"":
ret += readbytes
readbytes = posix.read(pipe_fd[0], 1000)
posix.close(pipe_fd[0])
posix.wait()
return str(ret, sys.stdout.encoding)
def tcp4_to_unix(local_port, unix_path):
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM,
socket.IPPROTO_TCP)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
server.bind(('127.0.0.1', local_port))
except socket.error as e:
sys.stderr.write('remote cant grab port %d\n' % local_port)
# let other end time to connect to maintain ssh up
time.sleep(10)
sys.exit(0)
server.listen(32)
while True:
(rl, wl, el) = select.select([server], [], [server], 1)
if server in rl:
(client, _) = server.accept()
if not posix.fork():
unix = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
try:
unix.connect(unix_path)
except socket.error as e:
print('Unable to grab %s: %s' % (unix_path, e))
pipe = FdPipe(client, client, unix, unix)
while pipe.one_loop():
pass
return
client.close()
try:
posix.waitpid(-1, posix.WNOHANG)
except OSError:
pass
def ioloop1(s, otheraddr):
#
# Watch out! data is in bytes, but the port counts in samples,
# which are two bytes each (for 16-bit samples).
# Luckily, we use mono, else it would be worse (2 samples/frame...)
#
SAMPSPERBUF = 500
BYTESPERSAMP = 2 # AL.SAMPLE_16
BUFSIZE = BYTESPERSAMP * SAMPSPERBUF
QSIZE = 4 * SAMPSPERBUF
#
config = al.newconfig()
config.setqueuesize(QSIZE)
config.setwidth(AL.SAMPLE_16)
config.setchannels(AL.MONO)
#
pid = posix.fork()
if pid:
# Parent -- speaker/headphones handler
log('parent started')
spkr = al.openport('spkr', 'w', config)
while 1:
data = s.recv(BUFSIZE)
if len(data) == 0:
# EOF packet
log('parent got empty packet; killing child')
posix.kill(pid, 15)
return
# Discard whole packet if we are too much behind
if spkr.getfillable() > len(data) / BYTESPERSAMP:
if len(debug) >= 2:
log('parent Q full; dropping packet')
spkr.writesamps(data)
else:
# Child -- microphone handler
log('child started')
try:
try:
mike = al.openport('mike', 'r', config)
# Sleep a while to let the other side get started
time.sleep(1)
# Drain the queue before starting to read
data = mike.readsamps(mike.getfilled())
# Loop, sending packets from the mike to the net
while 1:
data = mike.readsamps(SAMPSPERBUF)
s.sendto(data, otheraddr)
except KeyboardInterrupt:
log('child got interrupt; exiting')
posix._exit(0)
except error:
log('child got error; exiting')
posix._exit(1)
finally:
log('child got unexpected error; leaving w/ traceback')
def ioloop1(s, otheraddr):
#
# Watch out! data is in bytes, but the port counts in samples,
# which are two bytes each (for 16-bit samples).
# Luckily, we use mono, else it would be worse (2 samples/frame...)
#
SAMPSPERBUF = 500
BYTESPERSAMP = 2 # AL.SAMPLE_16
BUFSIZE = BYTESPERSAMP*SAMPSPERBUF
QSIZE = 4*SAMPSPERBUF
#
config = al.newconfig()
config.setqueuesize(QSIZE)
config.setwidth(AL.SAMPLE_16)
config.setchannels(AL.MONO)
#
pid = posix.fork()
if pid:
# Parent -- speaker/headphones handler
log('parent started')
spkr = al.openport('spkr', 'w', config)
while 1:
data = s.recv(BUFSIZE)
if len(data) == 0:
# EOF packet
log('parent got empty packet; killing child')
posix.kill(pid, 15)
return
# Discard whole packet if we are too much behind
if spkr.getfillable() > len(data) / BYTESPERSAMP:
if len(debug) >= 2:
log('parent Q full; dropping packet')
spkr.writesamps(data)
else:
# Child -- microphone handler
log('child started')
try:
try:
mike = al.openport('mike', 'r', config)
# Sleep a while to let the other side get started
time.sleep(1)
# Drain the queue before starting to read
data = mike.readsamps(mike.getfilled())
# Loop, sending packets from the mike to the net
while 1:
data = mike.readsamps(SAMPSPERBUF)
s.sendto(data, otheraddr)
except KeyboardInterrupt:
log('child got interrupt; exiting')
posix._exit(0)
except error:
log('child got error; exiting')
posix._exit(1)
finally:
log('child got unexpected error; leaving w/ traceback')
def test_exit(self):
try:
import posix, _rawffi
except ImportError:
skip("requires posix.fork() to test")
#
pid = posix.fork()
if pid == 0:
_rawffi.exit(5) # in the child
pid, status = posix.waitpid(pid, 0)
assert posix.WIFEXITED(status)
assert posix.WEXITSTATUS(status) == 5
def start(self):
if self.__parent_pid__ == os.getpid():
pid = posix.fork()
else:
pid = 0
self.__this_pid__ = os.getpid()
if pid: #TODO check existence of start function
try:
self.__runOnStartFunc__(self.__this_pid__)
except Exception as e:
pp_err.pprint(e)
return pid
def Start(self):
"""Start this process with fork(), haandling redirects."""
# TODO: If OSH were a job control shell, we might need to call some of
# these here. They control the distribution of signals, some of which
# originate from a terminal. All the processes in a pipeline should be in
# a single process group.
#
# - posix.setpgid()
# - posix.setpgrp()
# - posix.tcsetpgrp()
#
# NOTE: posix.setsid() isn't called by the shell; it's should be called by the
# login program that starts the shell.
#
# The whole job control mechanism is complicated and hacky.
pid = posix.fork()
if pid < 0:
# When does this happen?
raise RuntimeError('Fatal error in posix.fork()')
elif pid == 0: # child
# Respond to Ctrl-\ (core dump)
signal.signal(signal.SIGQUIT, signal.SIG_DFL)
# Respond to Ctrl-C
signal.signal(signal.SIGINT, signal.SIG_DFL)
# This doesn't make the child respond to Ctrl-Z? Why not? Is there
# something at the Python level? signalmodule.c has PyOS_AfterFork but
# it seems OK.
# If we add it then somehow the process stop responding to Ctrl-C too.
#signal.signal(signal.SIGTSTP, signal.SIG_DFL)
for st in self.state_changes:
st.Apply()
self.thunk.Run()
# Never returns
#log('STARTED process %s, pid = %d', self, pid)
# Invariant, after the process is started, it stores its PID.
self.pid = pid
return pid
else:
try:
port = getservbyname(servicename, 'tcp')
except error:
sys.stderr.write(servicename + ': bad tcp service name\n')
sys.exit(2)
s = socket(AF_INET, SOCK_STREAM)
try:
s.connect((host, port))
except error, msg:
sys.stderr.write('connect failed: ' + ` msg ` + '\n')
sys.exit(1)
pid = posix.fork()
if pid == 0:
# child -- read stdin, write socket
while 1:
line = sys.stdin.readline()
s.send(line)
else:
# parent -- read socket, write stdout
iac = 0 # Interpret next char as command
opt = '' # Interpret next char as option
while 1:
data = s.recv(BUFSIZE)
if not data:
# EOF; kill child and exit
sys.stderr.write('(Closed by remote host)\n')
else:
try:
port = getservbyname(servname, 'tcp')
except error:
sys.stderr.write(servname + ': bad tcp service name\n')
sys.exit(2)
#
s = socket(AF_INET, SOCK_STREAM)
#
try:
s.connect((host, port))
except error, msg:
sys.stderr.write('connect failed: ' + `msg` + '\n')
sys.exit(1)
#
pid = posix.fork()
#
if pid == 0:
# child -- read stdin, write socket
while 1:
line = sys.stdin.readline()
s.send(line)
else:
# parent -- read socket, write stdout
iac = 0 # Interpret next char as command
opt = '' # Interpret next char as option
while 1:
data = s.recv(BUFSIZE)
if not data:
# EOF; kill child and exit
sys.stderr.write( '(Closed by remote host)\n')
def main():
host = sys.argv[1]
try:
hostaddr = gethostbyname(host)
except error:
sys.stderr.write(sys.argv[1] + ': bad host name\n')
sys.exit(2)
#
if len(sys.argv) > 2:
servname = sys.argv[2]
else:
servname = 'telnet'
#
if '0' <= servname[:1] <= '9':
port = eval(servname)
else:
try:
port = getservbyname(servname, 'tcp')
except error:
sys.stderr.write(servname + ': bad tcp service name\n')
sys.exit(2)
#
s = socket(AF_INET, SOCK_STREAM)
#
try:
s.connect((host, port))
except error as msg:
sys.stderr.write('connect failed: ' + repr(msg) + '\n')
sys.exit(1)
#
pid = posix.fork()
#
if pid == 0:
# child -- read stdin, write socket
while 1:
line = sys.stdin.readline()
s.send(line)
else:
# parent -- read socket, write stdout
iac = 0 # Interpret next char as command
opt = '' # Interpret next char as option
while 1:
data = s.recv(BUFSIZE)
if not data:
# EOF; kill child and exit
sys.stderr.write( '(Closed by remote host)\n')
posix.kill(pid, 9)
sys.exit(1)
cleandata = ''
for c in data:
if opt:
print(ord(c))
s.send(opt + c)
opt = ''
elif iac:
iac = 0
if c == IAC:
cleandata = cleandata + c
elif c in (DO, DONT):
if c == DO: print('(DO)', end=' ')
else: print('(DONT)', end=' ')
opt = IAC + WONT
elif c in (WILL, WONT):
if c == WILL: print('(WILL)', end=' ')
else: print('(WONT)', end=' ')
opt = IAC + DONT
else:
print('(command)', ord(c))
elif c == IAC:
iac = 1
print('(IAC)', end=' ')
else:
cleandata = cleandata + c
sys.stdout.write(cleandata)
sys.stdout.flush()
def main():
host = sys.argv[1]
try:
hostaddr = gethostbyname(host)
except error:
sys.stderr.write(sys.argv[1] + ': bad host name\n')
sys.exit(2)
#
if len(sys.argv) > 2:
servname = sys.argv[2]
else:
servname = 'telnet'
#
if '0' <= servname[:1] <= '9':
port = eval(servname)
else:
try:
port = getservbyname(servname, 'tcp')
except error:
sys.stderr.write(servname + ': bad tcp service name\n')
sys.exit(2)
#
s = socket(AF_INET, SOCK_STREAM)
#
try:
s.connect((host, port))
except error as msg:
sys.stderr.write('connect failed: ' + repr(msg) + '\n')
sys.exit(1)
#
pid = posix.fork()
#
if pid == 0:
# child -- read stdin, write socket
while 1:
line = sys.stdin.readline()
s.send(line)
else:
# parent -- read socket, write stdout
iac = 0 # Interpret next char as command
opt = '' # Interpret next char as option
while 1:
data = s.recv(BUFSIZE)
if not data:
# EOF; kill child and exit
sys.stderr.write('(Closed by remote host)\n')
posix.kill(pid, 9)
sys.exit(1)
cleandata = ''
for c in data:
if opt:
print(ord(c))
s.send(opt + c)
opt = ''
elif iac:
iac = 0
if c == IAC:
cleandata = cleandata + c
elif c in (DO, DONT):
if c == DO: print('(DO)', end=' ')
else: print('(DONT)', end=' ')
opt = IAC + WONT
elif c in (WILL, WONT):
if c == WILL: print('(WILL)', end=' ')
else: print('(WONT)', end=' ')
opt = IAC + DONT
else:
print('(command)', ord(c))
elif c == IAC:
iac = 1
print('(IAC)', end=' ')
else:
cleandata = cleandata + c
sys.stdout.write(cleandata)
sys.stdout.flush()
# intercom -- use mike and headset to *talk* to a person on another host.
#! /usr/bin/env python # Minimal interface to the Internet telnet protocol. # # It refuses all telnet options and does not recognize any of the other # telnet commands, but can still be used to connect in line-by-line mode. # It's also useful to play with a number of other services, # like time, finger, smtp and even ftp. # # Usage: telnet host [port] # # The port may be a service name or a decimal port number; # it defaults to 'telnet'. import sys, posix, time from socket import * BUFSIZE = 1024 # Telnet protocol characters IAC = chr(255) # Interpret as command DONT = chr(254) DO = chr(253) WONT = chr(252) WILL = chr(251) def main(): host = sys.argv[1] try: hostaddr = gethostbyname(host) except error: sys.stderr.write(sys.argv[1] + ': bad host name\n') sys.exit(2) #
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_TCP)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
server.bind(("127.0.0.1", local_port))
except socket.error, e:
sys.stderr.write("remote cant grab port %d\n" % local_port)
# let other end time to connect to maintain ssh up
time.sleep(10)
sys.exit(0)
server.listen(32)
while True:
(rl, wl, el) = select.select([server], [], [server], 1)
if server in rl:
(client, _) = server.accept()
if not posix.fork():
unix = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
try:
unix.connect(unix_path)
except socket.error, e:
print "Unable to grab %s: %s" % (unix_path, e)
pipe = FdPipe(client, client, unix, unix)
while pipe.one_loop():
pass
return
client.close()
try:
posix.waitpid(-1, posix.WNOHANG)
except OSError:
pass
