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Commit | Line | Data |
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f0f16021 JS |
1 | #!/usr/bin/python3 |
2 | import serial | |
3 | ||
4 | import re | |
5 | ||
6 | from time import sleep | |
7 | import sys | |
8 | ||
9 | class serial_connection(): | |
10 | def __init__(self, device, username=None): | |
11 | self.buffer = b"" | |
12 | self.back_at_prompt_pattern = None | |
13 | self.username = username | |
14 | self.log = log(1) | |
15 | self.con = serial.Serial(device) | |
16 | ||
17 | def read(self, size=1): | |
18 | if len(self.buffer) >= size: | |
19 | # throw away first size bytes in buffer | |
20 | data = self.buffer[:size] | |
21 | # Set the buffer to the non used bytes | |
22 | self.buffer = self.buffer[size:] | |
23 | return data | |
24 | else: | |
25 | data = self.buffer | |
26 | # Set the size to the value we have to read now | |
27 | size = size - len(self.buffer) | |
28 | # Set the buffer empty | |
29 | self.buffer = b"" | |
30 | return data + self.con.read(size) | |
31 | ||
32 | def peek(self, size=1): | |
33 | if len(self.buffer) <= size: | |
34 | self.buffer += self.con.read(size=size - len(self.buffer)) | |
35 | ||
36 | return self.buffer[:size] | |
37 | ||
38 | def readline(self): | |
39 | self.log.debug(self.buffer) | |
40 | self.buffer = self.buffer + self.con.read(self.con.in_waiting) | |
41 | if b"\n" in self.buffer: | |
42 | size = self.buffer.index(b"\n") + 1 | |
43 | self.log.debug("We have a whole line in the buffer") | |
44 | self.log.debug(self.buffer) | |
45 | self.log.debug("We split at {}".format(size)) | |
46 | data = self.buffer[:size] | |
47 | self.buffer = self.buffer[size:] | |
48 | self.log.debug(data) | |
49 | self.log.debug(self.buffer) | |
50 | return data | |
51 | ||
52 | data = self.buffer | |
53 | self.buffer = b"" | |
54 | return data + self.con.readline() | |
55 | ||
56 | def back_at_prompt(self): | |
57 | data = self.peek() | |
58 | if not data == b"[": | |
59 | return False | |
60 | ||
61 | # We need to use self.in_waiting because with self.con.in_waiting we get | |
62 | # not the complete string | |
63 | size = len(self.buffer) + self.in_waiting | |
64 | data = self.peek(size) | |
65 | ||
66 | ||
67 | if self.back_at_prompt_pattern == None: | |
68 | #self.back_at_prompt_pattern = r"^\[{}@.+\]#".format(self.username) | |
69 | self.back_at_prompt_pattern = re.compile(r"^\[{}@.+\]#".format(self.username), re.MULTILINE) | |
70 | ||
71 | if self.back_at_prompt_pattern.search(data.decode()): | |
72 | return True | |
73 | else: | |
74 | return False | |
75 | ||
76 | def log_console_line(self, line): | |
77 | self.log.debug("Get in function log_console_line()") | |
78 | sys.stdout.write(line) | |
79 | ||
80 | @property | |
81 | def in_waiting(self): | |
82 | in_waiting_before = 0 | |
83 | sleep(0.5) | |
84 | ||
85 | while in_waiting_before != self.con.in_waiting: | |
86 | in_waiting_before = self.con.in_waiting | |
87 | sleep(0.5) | |
88 | ||
89 | return self.con.in_waiting | |
90 | ||
91 | def line_in_buffer(self): | |
92 | if b"\n" in self.buffer: | |
93 | return True | |
94 | ||
95 | return False | |
96 | ||
97 | def print_lines_in_buffer(self): | |
98 | while True: | |
99 | self.log.debug("Fill buffer ...") | |
100 | self.peek(len(self.buffer) + self.in_waiting) | |
101 | self.log.debug("Current buffer length: {}".format(len(self.buffer))) | |
102 | if self.line_in_buffer() == True: | |
103 | while self.line_in_buffer() == True: | |
104 | data = self.readline() | |
105 | self.log_console_line(data.decode()) | |
106 | else: | |
107 | self.log.debug("We have printed all lines in the buffer") | |
108 | break | |
109 | ||
110 | def login(self, password): | |
111 | if self.username == None: | |
112 | self.log.error("Username cannot be blank") | |
113 | return False | |
114 | ||
115 | self.print_lines_in_buffer() | |
116 | ||
117 | # Hit enter to see what we get | |
118 | self.con.write(b'\n') | |
119 | # We get two new lines \r\n ? | |
120 | data = self.readline() | |
121 | self.log_console_line(data.decode()) | |
122 | ||
123 | self.print_lines_in_buffer() | |
124 | ||
125 | if self.back_at_prompt(): | |
126 | self.log.debug("We are already logged in.") | |
127 | return True | |
128 | ||
129 | # Read all line till we get login: | |
130 | while 1: | |
131 | # We need to use self.in_waiting because with self.con.in_waiting we get | |
132 | # not the complete string | |
133 | size = len(self.buffer) + self.in_waiting | |
134 | data = self.peek(size) | |
135 | ||
136 | pattern = r"^.*login: " | |
137 | pattern = re.compile(pattern) | |
138 | ||
139 | if pattern.search(data.decode()): | |
140 | break | |
141 | else: | |
142 | self.log.debug("The pattern does not match") | |
143 | self.log.debug(self.peek(len(self.buffer) + self.in_waiting)) | |
144 | self.log_console_line(self.readline().decode()) | |
145 | ||
146 | # We can login | |
147 | string = "{}\n".format(self.username) | |
148 | self.con.write(string.encode()) | |
149 | self.con.flush() | |
150 | # read the login out of the buffer | |
151 | data = self.readline() | |
152 | self.log.debug("This is the login:{}".format(data)) | |
153 | self.log_console_line(data.decode()) | |
154 | ||
155 | # We need to wait her till we get the full string "Password:" | |
156 | #This is useless but self.in_waiting will wait the correct amount of time | |
157 | size = self.in_waiting | |
158 | ||
159 | string = "{}\n".format(password) | |
160 | self.con.write(string.encode()) | |
161 | self.con.flush() | |
162 | # Print the 'Password:' line | |
163 | data = self.readline() | |
164 | self.log_console_line(data.decode()) | |
165 | ||
166 | while not self.back_at_prompt(): | |
167 | # This will fail if the login failed so we need to look for the failed keyword | |
168 | data = self.readline() | |
169 | self.log_console_line(data.decode()) | |
170 | ||
171 | return True | |
172 | ||
173 | def write(self, string): | |
174 | self.log.debug(string) | |
175 | self.con.write(string.encode()) | |
176 | self.con.flush() | |
177 | ||
178 | def command(self, command): | |
179 | self.write("{}; echo \"END: $?\"\n".format(command)) | |
180 | ||
181 | # We need to read out the prompt for this command first | |
182 | # If we do not do this we will break the loop immediately | |
183 | # because the prompt for this command is still in the buffer | |
184 | data = self.readline() | |
185 | self.log_console_line(data.decode()) | |
186 | ||
187 | while not self.back_at_prompt(): | |
188 | data = self.readline() | |
189 | self.log_console_line(data.decode()) | |
190 | ||
191 | # We saved our exit code in data (the last line) | |
192 | self.log.debug(data.decode()) | |
193 | data = data.decode().replace("END: ", "") | |
194 | self.log.debug(data) | |
195 | self.log.debug(data.strip()) | |
196 | return data.strip() |