1 | # |
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2 | # RTEMS Tools Project (http://www.rtems.org/) |
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3 | # Copyright 2013-2017 Chris Johns (chrisj@rtems.org) |
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4 | # All rights reserved. |
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5 | # |
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6 | # This file is part of the RTEMS Tools package in 'rtems-tools'. |
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7 | # |
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8 | # Redistribution and use in source and binary forms, with or without |
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9 | # modification, are permitted provided that the following conditions are met: |
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10 | # |
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11 | # 1. Redistributions of source code must retain the above copyright notice, |
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12 | # this list of conditions and the following disclaimer. |
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13 | # |
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14 | # 2. Redistributions in binary form must reproduce the above copyright notice, |
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15 | # this list of conditions and the following disclaimer in the documentation |
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16 | # and/or other materials provided with the distribution. |
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17 | # |
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18 | # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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19 | # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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20 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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21 | # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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22 | # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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23 | # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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24 | # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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25 | # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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26 | # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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27 | # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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28 | # POSSIBILITY OF SUCH DAMAGE. |
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29 | # |
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30 | |
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31 | # |
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32 | # RTEMS Testing Consoles |
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33 | # |
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34 | |
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35 | import errno |
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36 | import os |
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37 | import sys |
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38 | import telnetlib |
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39 | |
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40 | from rtemstoolkit import error |
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41 | from rtemstoolkit import host |
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42 | from rtemstoolkit import path |
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43 | |
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44 | class tty: |
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45 | |
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46 | def __init__(self, dev): |
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47 | self.dev = dev |
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48 | self.timeout = 5 |
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49 | self.conn = None |
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50 | ds = dev.split(':') |
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51 | self.host = ds[0] |
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52 | if len(ds) == 1: |
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53 | self.port = 23 |
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54 | else: |
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55 | try: |
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56 | self.port = int(ds[1]) |
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57 | except: |
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58 | raise error.general('invalid port: %s' % (dev)) |
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59 | self.conn = telnetlib.Telnet() |
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60 | self._reopen() |
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61 | |
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62 | def __del__(self): |
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63 | if self.conn: |
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64 | try: |
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65 | self.conn.close() |
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66 | except: |
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67 | pass |
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68 | |
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69 | def __str__(self): |
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70 | s = 'host: %s port: %d' % ((self.host, self.port)) |
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71 | return s |
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72 | |
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73 | def _reopen(self): |
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74 | try: |
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75 | self.conn.open(self.host, self.port, self.timeout) |
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76 | except IOError as ioe: |
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77 | raise error.general('opening telnet: %s:%d: %s' % (self.host, |
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78 | self.port, |
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79 | ioe)) |
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80 | except: |
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81 | raise error.general('opening telnet: %s:%d: unknown' % (self.host, |
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82 | self.port)) |
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83 | |
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84 | def off(self): |
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85 | self.is_on = False |
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86 | |
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87 | def on(self): |
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88 | self.is_on = True |
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89 | |
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90 | def set(self, flags): |
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91 | pass |
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92 | |
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93 | def read(self): |
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94 | reopen = False |
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95 | try: |
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96 | data = self.conn.read_very_eager() |
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97 | except IOError as ioe: |
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98 | if ioe.errno == errno.ECONNREFUSED: |
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99 | reopen = True |
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100 | data = '' |
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101 | except EOFError: |
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102 | reopen = True |
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103 | data = '' |
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104 | if reopen: |
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105 | self._reopen() |
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106 | return data |
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107 | |
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108 | if __name__ == "__main__": |
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109 | if len(sys.argv) == 2: |
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110 | import time |
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111 | t = tty(sys.argv[1]) |
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112 | print(t) |
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113 | while True: |
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114 | time.sleep(0.05) |
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115 | c = t.read() |
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116 | sys.stdout.write(c) |
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