Dolda2000 GitWeb / ashd.git / blame
| Commit | Line | Data |
|---|---|---|
| 8d26ace8 FT |
1 | """Management for daemon processes |
| 2 | ||
| 3 | This module provides some client support for the daemon management | |
| 4 | provided in the ashd.pdm module. | |
| 5 | """ | |
| 6 | ||
| 7 | import socket | |
| 8 | ||
| 9 | class protoerr(Exception): | |
| 10 | pass | |
| 11 | ||
| 12 | def resolve(spec): | |
| 13 | if isinstance(spec, socket.socket): | |
| 14 | return spec | |
| 15 | sk = None | |
| 16 | try: | |
| 17 | if "/" in spec: | |
| 18 | sk = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) | |
| 19 | sk.connect(spec) | |
| 20 | elif spec.isdigit(): | |
| 21 | sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM) | |
| 22 | sk.connect(("localhost", int(spec))) | |
| 23 | elif ":" in spec: | |
| 24 | sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM) | |
| 25 | p = spec.rindex(":") | |
| 26 | sk.connect((spec[:p], int(spec[p + 1:]))) | |
| 27 | else: | |
| 28 | raise Exception("Unknown target specification %r" % spec) | |
| 29 | rv = sk | |
| 30 | sk = None | |
| 31 | finally: | |
| 32 | if sk is not None: sk.close() | |
| 33 | return rv | |
| 34 | ||
| 35 | class client(object): | |
| 36 | def __init__(self, sk, proto = None): | |
| 37 | self.sk = resolve(sk) | |
| 38 | self.buf = "" | |
| 39 | line = self.readline() | |
| 40 | if line != "+PDM1": | |
| 41 | raise protoerr("Illegal protocol signature") | |
| 42 | if proto is not None: | |
| 43 | self.select(proto) | |
| 44 | ||
| 45 | def close(self): | |
| 46 | self.sk.close() | |
| 47 | ||
| 48 | def readline(self): | |
| 49 | while True: | |
| 50 | p = self.buf.find("\n") | |
| 51 | if p >= 0: | |
| 52 | ret = self.buf[:p] | |
| 53 | self.buf = self.buf[p + 1:] | |
| 54 | return ret | |
| 55 | ret = self.sk.recv(1024) | |
| 56 | if ret == "": | |
| 57 | return None | |
| 58 | self.buf += ret | |
| 59 | ||
| 60 | def select(self, proto): | |
| 61 | if "\n" in proto: | |
| 62 | raise Exception("Illegal protocol specified: %r" % proto) | |
| 63 | self.sk.send(proto + "\n") | |
| 64 | rep = self.readline() | |
| 65 | if len(rep) < 1 or rep[0] != "+": | |
| 66 | raise protoerr("Error reply when selecting protocol %s: %s" % (proto, rep[1:])) | |
| 67 | ||
| 68 | def __enter__(self): | |
| 69 | return self | |
| 70 | ||
| 71 | def __exit__(self, *excinfo): | |
| 72 | self.close() | |
| 73 | return False | |
| 74 | ||
| 75 | class replclient(client): | |
| 76 | def __init__(self, sk): | |
| 77 | super(replclient, self).__init__(sk, "repl") | |
| 78 | ||
| 79 | def run(self, code): | |
| 80 | while True: | |
| 81 | ncode = code.replace("\n\n", "\n") | |
| 82 | if ncode == code: break | |
| 83 | code = ncode | |
| 84 | while len(code) > 0 and code[-1] == "\n": | |
| 85 | code = code[:-1] | |
| 86 | self.sk.send(code + "\n\n") | |
| 87 | buf = "" | |
| 88 | while True: | |
| 89 | ln = self.readline() | |
| 90 | if ln[0] == " ": | |
| 91 | buf += ln[1:] + "\n" | |
| 92 | elif ln[0] == "+": | |
| 93 | return buf | |
| 94 | elif ln[0] == "-": | |
| 95 | raise protoerr("Error reply: %s" % ln[1:]) | |
| 96 | else: | |
| 97 | raise protoerr("Illegal reply: %s" % ln) |