Python的基本外壳。 如何更改目录？

Question

Server-side code, which handles the client's sent data.

#receiving data
data = client.recv(1024)
# if it's quit, then break out and close socket
if data.decode("UTF-8") == "quit": break
# do shell command
proc = subprocess.Popen(data.decode("UTF-8"), shell=True, stdout=subprocess.PIPE, \
       stderr=subprocess.PIPE, stdin=subprocess.PIPE)
# read output
stdout_value = proc.stdout.read() + proc.stderr.read()
valid = "done"
if stdout_value.decode(sys.stdout.encoding, errors="ignore") == "":
    client.send(valid.encode("utf-8")) # for commands like "C:", which print nothing
# send output
client.send(stdout_value)

Client-side code, which sends data (commands) and prints the results

reply = input()
client.send(reply.encode("UTF-8"))

receive = client.recv(4096)
print(receive.decode(sys.stdout.encoding, errors="ignore")

When I try to use a command such as "cd ..", it doesn't succeed because as far as I know, it changes directory to the child process. Is there any way to change the parent's directory, using the client?

Answer 1

Yes, you're right. "cd" will change the child process dir.

But, you can analyse the command before execute and apply some special behavior.

Beware, ugly code detected.

from os import chdir
...
if data.startswith('cd '):
    chdir(data[3:])  # Don't execute with Popen
else:
    proc = .....