41 lines
901 B
Python
41 lines
901 B
Python
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"""
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This Python script creates a TCP server that does nothing but send its input
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back to the client that connects to it. Only one argument must be given, a port
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to bind to.
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"""
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import os
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import socket
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import sys
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def main():
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if len(sys.argv) < 2 or not sys.argv[1].isdigit():
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sys.exit('You must specify a port number')
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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sock.bind(('127.0.0.1', int(sys.argv[1])))
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sock.listen(0)
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pid = os.fork()
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if pid:
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print(pid)
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sys.exit()
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while True:
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connection = sock.accept()[0]
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connection.settimeout(5)
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while True:
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try:
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connection.send(connection.recv(1024))
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except socket.timeout:
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break
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connection.close()
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if __name__ == "__main__":
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main()
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