def read(self, length, offset):
log("read", self.fd, length, offset)
try:
lind.lseek_syscall(self.fd, offset, 0)
ret = lind.read_syscall(self.fd, length)
except lind.SyscallError, e:
ret = -errno[e[1]]
def write(self, buf, offset):
log("write", self.fd, buf, offset)
try:
lind.lseek_syscall(self.fd, offset, 0)
ret = lind.write_syscall(self.fd, buf)
except lind.SyscallError, e:
ret = -errno[e[1]]
def write(self, buf, offset):
log("write", self.fd, buf, offset)
try:
lind.lseek_syscall(self.fd, offset, 0)
ret = lind.write_syscall(self.fd, buf)
except lind.SyscallError, e:
ret = -errno[e[1]]
def read(self, length, offset):
log("read", self.fd, length, offset)
try:
lind.lseek_syscall(self.fd, offset, 0)
ret = lind.read_syscall(self.fd, length)
except lind.SyscallError, e:
ret = -errno[e[1]]
def process_request():
"""
<Purpose>
Server thread for processing connections using select ...
"""
while True:
#Pass list of Inputs, Outputs for select which returns if any activity
#occurs on any socket.
ret = lind_test_server.select_syscall(11, inputs, outputs, excepts, 5)
#Check for any activity in any of the Input sockets...
for sock in ret[1]:
#If the socket returned was listerner socket, then there's a new conn.
#so we accept it, and put the client socket in the list of Inputs.
if sock is serversockfd:
newsockfd = lind_test_server.accept_syscall(sock)
inputs.append(newsockfd[2])
#Write to a file...
elif sock is filefd:
emultimer.sleep(1)
assert lind_test_server.write_syscall(sock, 'test') == 4, \
"Failed to write into a file..."
lind_test_server.lseek_syscall(sock, 0, SEEK_SET)
inputs.remove(sock)
#If the socket is in established conn., then we recv the data, if
#there's no data, then close the client socket.
else:
data = lind_test_server.recv_syscall(sock, 100, 0)
if data:
assert data == "test", "Recv failed in select..."
#We make the ouput ready, so that it sends out data...
if sock not in outputs:
outputs.append(sock)
else:
#No data means remote socket closed, hence close the client socket
#in server, also remove this socket from readfd's.
lind_test_server.close_syscall(sock)
inputs.remove(sock)
#Check for any activity in any of the output sockets...
for sock in ret[2]:
if sock is filefd:
assert lind_test_server.read_syscall(sock, 4) == "test", \
"Failed to read from a file..."
#test for file finished, remove from monitoring.
outputs.remove(sock)
else:
lind_test_server.send_syscall(sock, data, 0)
#Data is sent out this socket, it's no longer ready for writing
#remove this socket from writefd's.
outputs.remove(sock)
lind_test_server.close_syscall(serversockfd)
def process_request():
"""
<Purpose>
Server thread for processing connections using select ...
"""
while True:
#Pass list of Inputs, Outputs for select which returns if any activity
#occurs on any socket.
ret = lind_test_server.select_syscall(11, inputs, outputs, excepts, 5)
#Check for any activity in any of the Input sockets...
for sock in ret[1]:
#If the socket returned was listerner socket, then there's a new conn.
#so we accept it, and put the client socket in the list of Inputs.
if sock is serversockfd:
newsockfd = lind_test_server.accept_syscall(sock)
inputs.append(newsockfd[2])
#Write to a file...
elif sock is filefd:
emultimer.sleep(1)
assert lind_test_server.write_syscall(sock, 'test') == 4, \
"Failed to write into a file..."
lind_test_server.lseek_syscall(sock, 0, SEEK_SET)
inputs.remove(sock)
#If the socket is in established conn., then we recv the data, if
#there's no data, then close the client socket.
else:
data = lind_test_server.recv_syscall(sock, 100, 0)
if data:
assert data == "test", "Recv failed in select..."
#We make the ouput ready, so that it sends out data...
if sock not in outputs:
outputs.append(sock)
else:
#No data means remote socket closed, hence close the client socket
#in server, also remove this socket from readfd's.
lind_test_server.close_syscall(sock)
inputs.remove(sock)
#Check for any activity in any of the output sockets...
for sock in ret[2]:
if sock is filefd:
assert lind_test_server.read_syscall(sock, 4) == "test", \
"Failed to read from a file..."
#test for file finished, remove from monitoring.
outputs.remove(sock)
else:
lind_test_server.send_syscall(sock, data, 0)
#Data is sent out this socket, it's no longer ready for writing
#remove this socket from writefd's.
outputs.remove(sock)
lind_test_server.close_syscall(serversockfd)
lind_test_server.close_syscall(myfd)
# Read only file descriptor opened
rdfd = lind_test_server.open_syscall('/hello', O_RDONLY, S_IRWXA)
try:
# File written
lind_test_server.write_syscall(rdfd, 'Hello everyone!')
except lind_test_server.SyscallError:
# should be an error
pass
else:
print "Error! Should have been blocked from writing with O_RDONLY"
lind_test_server.lseek_syscall(rdfd, 0, SEEK_SET)
# should work...
lind_test_server.read_syscall(rdfd, 100)
lind_test_server.close_syscall(rdfd)
# Alternately
wrfd = lind_test_server.open_syscall('/hello', O_WRONLY, S_IRWXA)
try:
# Can I read a write only file?
lind_test_server.read_syscall(wrfd, 50)
except lind_test_server.SyscallError:
# should be an error
import lind_test_server
from lind_fs_constants import *
# Try read / write of a file and see if it works...
lind_test_server._blank_fs_init()
myfd = lind_test_server.open_syscall('/foo', O_CREAT | O_EXCL | O_RDWR,
S_IRWXA)
# write should succeed
assert (lind_test_server.write_syscall(myfd, 'hello there!') == 12)
# seek to the beginning...
assert (lind_test_server.lseek_syscall(myfd, 0, SEEK_SET) == 0)
# read the first 5 bytes (hello)
assert (lind_test_server.read_syscall(myfd, 5) == 'hello')
# change it to hello world!
assert (lind_test_server.write_syscall(myfd, ' world') == 6)
# seek to the beginning again...
assert (lind_test_server.lseek_syscall(myfd, 0, SEEK_SET) == 0)
# and read it all...
assert (lind_test_server.read_syscall(myfd, 100) == 'hello world!')
lind_test_server.close_syscall(myfd)
def process_request():
"""
<Purpose>
Server thread for processing connections using poll ...
"""
while True:
#Pass list of sockets that needs for polling which returns if any activity
#occurs on any socket.
poll_vals = lind_test_server.poll_syscall(polled, 5)
ret = [poll_vals[0],[],[],[]]
ret[1] = [x['fd'] for x in poll_vals[1] if x['revents'] & lind_test_server.POLLIN]
ret[2] = [x['fd'] for x in poll_vals[1] if x['revents'] & lind_test_server.POLLOUT]
#Check for any activity in any of the Input sockets...
for sock in ret[1]:
#If the socket returned was listerner socket, then there's a new conn.
#so we accept it, and put the client socket in the list of Inputs.
if sock is serversockfd:
newsockfd = lind_test_server.accept_syscall(sock)
new_poll = {'fd':newsockfd[2], 'events':lind_test_server.POLLIN, 'revents':0}
polled.append(new_poll)
#Write to a file...
elif sock is filefd:
assert lind_test_server.write_syscall(sock, 'test') == 4, \
"Failed to write into a file..."
lind_test_server.lseek_syscall(sock, 0, SEEK_SET)
#Once the write is successful into a file, Modify the file descriptor
#so that its ready for reading out of the file.
[x for x in polled if x['fd'] == sock][0]['events'] = \
lind_test_server.POLLOUT
#If the socket is in established conn., then we recv the data, if
#there's no data, then close the client socket.
else:
data = lind_test_server.recv_syscall(sock, 100, 0)
if data:
assert data == "test", "Recv failed in select..."
#This socket is ready for writing, modify the socket descriptor
#to be in read-write mode. This socket can write data out to network
[x for x in polled if x['fd'] == sock][0]['events'] = \
lind_test_server.POLLIN | lind_test_server.POLLOUT
else:
#No data means remote socket closed, hence close the client socket
#in server, also remove this socket from polling.
lind_test_server.close_syscall(sock)
to_go = [x for x in polled if x['fd'] == sock]
map(polled.remove, to_go)
#Check for any activity in any of the output sockets...
for sock in ret[2]:
if sock is filefd:
assert lind_test_server.read_syscall(sock, 4) == "test", \
"Failed to read from a file..."
#test for file finished, remove from polling.
to_go = [x for x in polled if x['fd'] == sock]
map(polled.remove, to_go)
else:
lind_test_server.send_syscall(sock, data, 0)
#Data is sent out of this socket, it's no longer ready for writing,
#modify it only read mode.
[x for x in polled if x['fd'] == sock][0]['events'] = \
lind_test_server.POLLIN
lind_test_server.close_syscall(serversockfd)
flags = O_TRUNC | O_CREAT | O_RDWR
mode = 438 # 0666
name = 'double_open_file'
myfd = lind_test_server.open_syscall(name, flags, mode)
assert (lind_test_server.write_syscall(myfd, 'hi') == 2)
# duplicate the file descriptor...
myfd2 = lind_test_server.dup2_syscall(myfd, myfd + 1)
# this should actually be essentially a no-op. It closes myfd+1 and sets it
# to be the same as the current fd (which was done by the prior call)
myfd2 = lind_test_server.dup2_syscall(myfd, myfd + 1)
# should be at the same place...
assert (lind_test_server.lseek_syscall(
myfd, 0, SEEK_CUR) == lind_test_server.lseek_syscall(myfd2, 0, SEEK_CUR))
# write some data to move the first position
assert (lind_test_server.write_syscall(myfd, 'yo') == 2)
# _still_ should be at the same place...
assert (lind_test_server.lseek_syscall(
myfd, 0, SEEK_CUR) == lind_test_server.lseek_syscall(myfd2, 0, SEEK_CUR))
# reset the position within the file
lind_test_server.lseek_syscall(myfd2, 0, SEEK_SET)
# read from the other fd
assert (lind_test_server.read_syscall(myfd, 10) == 'hiyo')
# close one fd
fd = lind_test_server.open_syscall('/foo', O_CREAT | O_EXCL | O_RDWR, S_IRWXA)
# Make a big file
msg = "Hello" * 100
size = len(msg)
# how small will we make the file
TRUNCATE_SIZE = 10
NEW_TRUNCATE_SIZE = 200
lind_test_server.write_syscall(fd, msg)
lind_test_server.ftruncate_syscall(fd, TRUNCATE_SIZE)
# seek to the beginning...
assert(lind_test_server.lseek_syscall(fd, 0, SEEK_SET) == 0)
data = lind_test_server.read_syscall(fd, 100)
assert len(data) == TRUNCATE_SIZE, "File must be smaller after truncate"
assert data == msg[:TRUNCATE_SIZE], "New files contents must match: \n%s\n%s" \
% (data, msg[:TRUNCATE_SIZE])
lind_test_server.ftruncate_syscall(fd, NEW_TRUNCATE_SIZE)
# seek to the beginning...
assert(lind_test_server.lseek_syscall(fd, 0, SEEK_SET) == 0)
flags = O_TRUNC | O_CREAT | O_RDWR
mode = 438 # 0666
name = 'double_open_file'
myfd = lind_test_server.open_syscall(name, flags, mode)
assert(lind_test_server.write_syscall(myfd,'hi')==2)
# duplicate the file descriptor...
myfd2 = lind_test_server.dup2_syscall(myfd,myfd+1)
# this should actually be essentially a no-op. It closes myfd+1 and sets it
# to be the same as the current fd (which was done by the prior call)
myfd2 = lind_test_server.dup2_syscall(myfd,myfd+1)
# should be at the same place...
assert(lind_test_server.lseek_syscall(myfd,0,SEEK_CUR) ==
lind_test_server.lseek_syscall(myfd2,0,SEEK_CUR))
# write some data to move the first position
assert(lind_test_server.write_syscall(myfd,'yo')==2)
# _still_ should be at the same place...
assert(lind_test_server.lseek_syscall(myfd,0,SEEK_CUR) ==
lind_test_server.lseek_syscall(myfd2,0,SEEK_CUR))
# reset the position within the file
lind_test_server.lseek_syscall(myfd2,0,SEEK_SET)
# read from the other fd
assert(lind_test_server.read_syscall(myfd,10)=='hiyo')
TEST_FILENAME = "/someSimpleFileName"
TEST2_FILENAME = "/otherSimpleFileName2"
if __name__ == "__main__":
lind_test_server._blank_fs_init()
# Everything is okay, so now make a file
myfd = lind_test_server.open_syscall(TEST_FILENAME, O_CREAT | O_EXCL | O_RDWR, S_IRWXA)
# write should succeed
assert lind_test_server.write_syscall(myfd, "hello there!") == 12
# seek to the beginning...
assert lind_test_server.lseek_syscall(myfd, 0, SEEK_SET) == 0
# read the first 5 bytes (hello)
assert lind_test_server.read_syscall(myfd, 5) == "hello"
# change it to hello world!
assert lind_test_server.write_syscall(myfd, " world") == 6
# seek to the beginning again...
assert lind_test_server.lseek_syscall(myfd, 0, SEEK_SET) == 0
# and read it all...
assert lind_test_server.read_syscall(myfd, 100) == "hello world!"
lind_test_server.close_syscall(myfd)