diff options
author | Ori Bernstein <ori@eigenstate.org> | 2021-06-14 00:00:37 +0000 |
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committer | Ori Bernstein <ori@eigenstate.org> | 2021-06-14 00:00:37 +0000 |
commit | a73a964e51247ed169d322c725a3a18859f109a3 (patch) | |
tree | 3f752d117274d444bda44e85609aeac1acf313f3 /sys/src/cmd/python/Demo/sockets/telnet.py | |
parent | e64efe273fcb921a61bf27d33b230c4e64fcd425 (diff) |
python, hg: tow outside the environment.
they've served us well, and can ride off into the sunset.
Diffstat (limited to 'sys/src/cmd/python/Demo/sockets/telnet.py')
-rwxr-xr-x | sys/src/cmd/python/Demo/sockets/telnet.py | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/sys/src/cmd/python/Demo/sockets/telnet.py b/sys/src/cmd/python/Demo/sockets/telnet.py deleted file mode 100755 index d50c37f2c..000000000 --- a/sys/src/cmd/python/Demo/sockets/telnet.py +++ /dev/null @@ -1,109 +0,0 @@ -#! /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) - # - 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, 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)', - else: print '(DONT)', - opt = IAC + WONT - elif c in (WILL, WONT): - if c == WILL: print '(WILL)', - else: print '(WONT)', - opt = IAC + DONT - else: - print '(command)', ord(c) - elif c == IAC: - iac = 1 - print '(IAC)', - else: - cleandata = cleandata + c - sys.stdout.write(cleandata) - sys.stdout.flush() - - -try: - main() -except KeyboardInterrupt: - pass |