1 | # |
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2 | # RTEMS Tools Project (http://www.rtems.org/) |
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3 | # Copyright 2010-2014 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 | # Execute commands or scripts. |
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33 | # |
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34 | # Note, the subprocess module is only in Python 2.4 or higher. |
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35 | # |
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36 | |
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37 | import os |
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38 | import re |
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39 | import sys |
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40 | import subprocess |
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41 | import threading |
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42 | import time |
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43 | |
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44 | import error |
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45 | import log |
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46 | |
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47 | # Trace exceptions |
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48 | trace_threads = False |
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49 | |
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50 | # Redefine the PIPE from subprocess |
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51 | PIPE = subprocess.PIPE |
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52 | |
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53 | # Regular expression to find quotes. |
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54 | qstr = re.compile('[rR]?\'([^\\n\'\\\\]|\\\\.)*\'|[rR]?"([^\\n"\\\\]|\\\\.)*"') |
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55 | |
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56 | def check_type(command): |
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57 | """Checks the type of command we have. The types are spawn and |
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58 | shell.""" |
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59 | if command in ['spawn', 'shell']: |
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60 | return True |
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61 | return False |
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62 | |
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63 | def arg_list(args): |
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64 | """Turn a string of arguments into a list suitable for |
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65 | spawning a command. If the args are already a list return |
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66 | it.""" |
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67 | if type(args) is list: |
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68 | return args |
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69 | argstr = args |
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70 | args = [] |
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71 | while len(argstr): |
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72 | qs = qstr.search(argstr) |
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73 | if not qs: |
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74 | args.extend(argstr.split()) |
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75 | argstr= '' |
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76 | else: |
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77 | # We have a quoted string. Get the string before |
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78 | # the quoted string and splt on white space then |
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79 | # add the quoted string as an option then remove |
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80 | # the first + quoted string and try again |
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81 | front = argstr[:qs.start()] |
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82 | args.extend(front.split()) |
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83 | args.append(argstr[qs.start() + 1:qs.end() - 1]) |
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84 | argstr = argstr[qs.end():] |
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85 | return args |
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86 | |
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87 | def arg_subst(command, substs): |
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88 | """Substitute the %[0-9] in the command with the subst values.""" |
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89 | args = arg_list(command) |
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90 | if substs: |
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91 | for a in range(0, len(args)): |
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92 | for r in range(0, len(substs)): |
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93 | args[a] = re.compile(('%%%d' % (r))).sub(substs[r], args[a]) |
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94 | return args |
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95 | |
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96 | def arg_subst_str(command, subst): |
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97 | cmd = arg_subst(command, subst) |
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98 | def add(x, y): return x + ' ' + str(y) |
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99 | return reduce(add, cmd, '') |
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100 | |
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101 | class execute(object): |
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102 | """Execute commands or scripts. The 'output' is a funtion that handles the |
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103 | output from the process. The 'input' is a function that blocks and returns |
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104 | data to be written to stdin""" |
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105 | def __init__(self, output = None, input = None, cleanup = None, |
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106 | error_prefix = '', verbose = False): |
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107 | self.lock = threading.Lock() |
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108 | self.output = output |
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109 | self.input = input |
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110 | self.cleanup = cleanup |
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111 | self.error_prefix = error_prefix |
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112 | self.verbose = verbose |
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113 | self.shell_exe = None |
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114 | self.shell_commands = False |
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115 | self.path = None |
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116 | self.environment = None |
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117 | self.outputting = False |
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118 | self.timing_out = False |
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119 | self.proc = None |
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120 | |
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121 | def _capture(self, command, proc, timeout = None): |
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122 | """Create 3 threads to read stdout and stderr and send to the output handler |
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123 | and call an input handler is provided. Based on the 'communicate' code |
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124 | in the subprocess module.""" |
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125 | def _writethread(exe, fh, input): |
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126 | """Call the input handler and write it to the stdin. The input handler should |
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127 | block and return None or False if this thread is to exit and True if this |
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128 | is a timeout check.""" |
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129 | if trace_threads: |
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130 | print 'executte:_writethread: start' |
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131 | try: |
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132 | while True: |
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133 | lines = input() |
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134 | if type(lines) == str: |
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135 | try: |
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136 | fh.write(lines) |
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137 | except: |
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138 | break |
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139 | if lines == None or \ |
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140 | lines == False or \ |
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141 | (lines == True and fh.closed): |
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142 | break |
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143 | except: |
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144 | if trace_threads: |
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145 | print 'executte:_writethread: exception' |
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146 | pass |
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147 | try: |
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148 | fh.close() |
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149 | except: |
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150 | pass |
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151 | if trace_threads: |
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152 | print 'executte:_writethread: finished' |
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153 | |
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154 | def _readthread(exe, fh, out, prefix = ''): |
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155 | """Read from a file handle and write to the output handler |
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156 | until the file closes.""" |
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157 | def _output_line(line, exe, prefix, out, count): |
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158 | #print 'LINE:%d: %s' % (count, line) |
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159 | exe.lock.acquire() |
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160 | #exe.outputting = True |
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161 | exe.lock.release() |
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162 | if out: |
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163 | out(prefix + line) |
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164 | else: |
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165 | log.output(prefix + line) |
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166 | if count > 10: |
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167 | log.flush() |
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168 | |
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169 | if trace_threads: |
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170 | print 'executte:_readthread: start' |
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171 | count = 0 |
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172 | line = '' |
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173 | try: |
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174 | while True: |
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175 | data = fh.read(1) |
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176 | if len(data) == 0: |
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177 | break |
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178 | #print '))))) %02x "%s"' % (ord(data), data) |
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179 | for c in data: |
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180 | line += c |
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181 | if c == '\n': |
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182 | count += 1 |
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183 | _output_line(line, exe, prefix, out, count) |
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184 | if count > 10: |
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185 | count = 0 |
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186 | line = '' |
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187 | except: |
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188 | raise |
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189 | if trace_threads: |
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190 | print 'executte:_readthread: exception' |
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191 | pass |
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192 | try: |
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193 | fh.close() |
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194 | except: |
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195 | pass |
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196 | if len(line): |
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197 | _output_line(line, exe, prefix, out, 100) |
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198 | if trace_threads: |
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199 | print 'executte:_readthread: finished' |
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200 | |
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201 | def _timerthread(exe, interval, function): |
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202 | """Timer thread is used to timeout a process if no output is |
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203 | produced for the timeout interval.""" |
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204 | count = interval |
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205 | while exe.timing_out: |
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206 | time.sleep(1) |
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207 | if count > 0: |
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208 | count -= 1 |
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209 | exe.lock.acquire() |
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210 | if exe.outputting: |
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211 | count = interval |
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212 | exe.outputting = False |
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213 | exe.lock.release() |
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214 | if count == 0: |
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215 | try: |
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216 | proc.kill() |
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217 | except: |
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218 | pass |
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219 | else: |
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220 | function() |
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221 | break |
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222 | |
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223 | name = os.path.basename(command[0]) |
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224 | |
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225 | stdin_thread = None |
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226 | stdout_thread = None |
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227 | stderr_thread = None |
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228 | timeout_thread = None |
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229 | |
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230 | if proc.stdout: |
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231 | stdout_thread = threading.Thread(target = _readthread, |
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232 | name = '_stdout[%s]' % (name), |
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233 | args = (self, |
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234 | proc.stdout, |
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235 | self.output, |
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236 | '')) |
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237 | stdout_thread.daemon = True |
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238 | stdout_thread.start() |
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239 | if proc.stderr: |
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240 | stderr_thread = threading.Thread(target = _readthread, |
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241 | name = '_stderr[%s]' % (name), |
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242 | args = (self, |
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243 | proc.stderr, |
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244 | self.output, |
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245 | self.error_prefix)) |
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246 | stderr_thread.daemon = True |
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247 | stderr_thread.start() |
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248 | if self.input and proc.stdin: |
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249 | stdin_thread = threading.Thread(target = _writethread, |
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250 | name = '_stdin[%s]' % (name), |
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251 | args = (self, |
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252 | proc.stdin, |
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253 | self.input)) |
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254 | stdin_thread.daemon = True |
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255 | stdin_thread.start() |
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256 | if timeout: |
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257 | self.timing_out = True |
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258 | timeout_thread = threading.Thread(target = _timerthread, |
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259 | name = '_timeout[%s]' % (name), |
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260 | args = (self, |
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261 | timeout[0], |
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262 | timeout[1])) |
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263 | timeout_thread.daemon = True |
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264 | timeout_thread.start() |
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265 | try: |
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266 | self.lock.acquire() |
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267 | try: |
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268 | self.proc = proc |
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269 | except: |
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270 | raise |
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271 | finally: |
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272 | self.lock.release() |
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273 | exitcode = proc.wait() |
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274 | except: |
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275 | proc.kill() |
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276 | raise |
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277 | finally: |
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278 | self.lock.acquire() |
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279 | try: |
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280 | self.proc = None |
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281 | except: |
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282 | raise |
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283 | finally: |
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284 | self.lock.release() |
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285 | if self.cleanup: |
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286 | self.cleanup(proc) |
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287 | if timeout_thread: |
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288 | self.timing_out = False |
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289 | timeout_thread.join(10) |
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290 | if stdin_thread: |
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291 | stdin_thread.join(2) |
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292 | if stdout_thread: |
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293 | stdout_thread.join(2) |
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294 | if stderr_thread: |
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295 | stderr_thread.join(2) |
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296 | return exitcode |
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297 | |
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298 | def open(self, command, capture = True, shell = False, |
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299 | cwd = None, env = None, |
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300 | stdin = None, stdout = None, stderr = None, |
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301 | timeout = None): |
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302 | """Open a command with arguments. Provide the arguments as a list or |
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303 | a string.""" |
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304 | if self.verbose: |
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305 | s = command |
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306 | if type(command) is list: |
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307 | def add(x, y): return x + ' ' + str(y) |
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308 | s = reduce(add, command, '')[1:] |
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309 | what = 'spawn' |
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310 | if shell: |
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311 | what = 'shell' |
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312 | log.output(what + ': ' + s) |
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313 | if shell and self.shell_exe: |
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314 | command = arg_list(command) |
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315 | command[:0] = self.shell_exe |
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316 | if not stdin and self.input: |
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317 | stdin = subprocess.PIPE |
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318 | if not stdout: |
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319 | stdout = subprocess.PIPE |
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320 | if not stderr: |
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321 | stderr = subprocess.PIPE |
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322 | proc = None |
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323 | if cwd is None: |
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324 | cwd = self.path |
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325 | if env is None: |
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326 | env = self.environment |
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327 | try: |
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328 | # Work around a problem on Windows with commands that |
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329 | # have a '.' and no extension. Windows needs the full |
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330 | # command name. |
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331 | if sys.platform == "win32" and type(command) is list: |
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332 | if command[0].find('.') >= 0: |
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333 | r, e = os.path.splitext(command[0]) |
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334 | if e not in ['.exe', '.com', '.bat']: |
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335 | command[0] = command[0] + '.exe' |
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336 | log.trace('exe: %s' % (command)) |
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337 | proc = subprocess.Popen(command, shell = shell, |
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338 | cwd = cwd, env = env, |
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339 | stdin = stdin, stdout = stdout, |
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340 | stderr = stderr) |
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341 | if not capture: |
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342 | return (0, proc) |
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343 | if self.output is None: |
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344 | raise error.general('capture needs an output handler') |
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345 | exit_code = self._capture(command, proc, timeout) |
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346 | if self.verbose: |
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347 | log.output('exit: ' + str(exit_code)) |
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348 | except OSError, ose: |
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349 | exit_code = ose.errno |
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350 | if self.verbose: |
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351 | log.output('exit: ' + str(ose)) |
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352 | return (exit_code, proc) |
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353 | |
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354 | def spawn(self, command, capture = True, cwd = None, env = None, |
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355 | stdin = None, stdout = None, stderr = None, |
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356 | timeout = None): |
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357 | """Spawn a command with arguments. Provide the arguments as a list or |
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358 | a string.""" |
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359 | return self.open(command, capture, False, cwd, env, |
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360 | stdin, stdout, stderr, timeout) |
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361 | |
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362 | def shell(self, command, capture = True, cwd = None, env = None, |
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363 | stdin = None, stdout = None, stderr = None, |
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364 | timeout = None): |
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365 | """Execute a command within a shell context. The command can contain |
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366 | argumments. The shell is specific to the operating system. For example |
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367 | it is cmd.exe on Windows XP.""" |
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368 | return self.open(command, capture, True, cwd, env, |
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369 | stdin, stdout, stderr, timeout) |
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370 | |
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371 | def command(self, command, args = None, capture = True, shell = False, |
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372 | cwd = None, env = None, |
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373 | stdin = None, stdout = None, stderr = None, |
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374 | timeout = None): |
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375 | """Run the command with the args. The args can be a list |
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376 | or a string.""" |
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377 | if args and not type(args) is list: |
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378 | args = arg_list(args) |
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379 | cmd = [command] |
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380 | if args: |
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381 | cmd.extend(args) |
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382 | return self.open(cmd, capture = capture, shell = shell, |
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383 | cwd = cwd, env = env, |
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384 | stdin = stdin, stdout = stdout, stderr = stderr, |
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385 | timeout = timeout) |
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386 | |
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387 | def command_subst(self, command, substs, capture = True, shell = False, |
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388 | cwd = None, env = None, |
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389 | stdin = None, stdout = None, stderr = None, |
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390 | timeout = None): |
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391 | """Run the command from the config data with the |
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392 | option format string subsituted with the subst variables.""" |
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393 | args = arg_subst(command, substs) |
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394 | return self.command(args[0], args[1:], capture = capture, |
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395 | shell = shell or self.shell_commands, |
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396 | cwd = cwd, env = env, |
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397 | stdin = stdin, stdout = stdout, stderr = stderr, |
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398 | itmeout = timeout) |
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399 | |
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400 | def set_shell(self, execute): |
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401 | """Set the shell to execute when issuing a shell command.""" |
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402 | args = arg_list(execute) |
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403 | if len(args) == 0 or not os.path.isfile(args[0]): |
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404 | raise error.general('could find shell: ' + execute) |
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405 | self.shell_exe = args |
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406 | |
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407 | def command_use_shell(self): |
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408 | """Force all commands to use a shell. This can be used with set_shell |
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409 | to allow Unix commands be executed on Windows with a Unix shell such |
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410 | as Cygwin or MSYS. This may cause piping to fail.""" |
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411 | self.shell_commands = True |
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412 | |
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413 | def set_output(self, output): |
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414 | """Set the output handler. The stdout of the last process in a pipe |
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415 | line is passed to this handler.""" |
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416 | old_output = self.output |
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417 | self.output = output |
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418 | return old_output |
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419 | |
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420 | def set_path(self, path): |
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421 | """Set the path changed to before the child process is created.""" |
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422 | old_path = self.path |
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423 | self.path = path |
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424 | return old_path |
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425 | |
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426 | def set_environ(self, environment): |
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427 | """Set the environment passed to the child process when created.""" |
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428 | old_environment = self.environment |
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429 | self.environment = environment |
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430 | return old_environment |
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431 | |
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432 | def kill(self): |
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433 | self.lock.acquire() |
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434 | try: |
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435 | if self.proc is not None: |
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436 | self.proc.kill() |
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437 | except: |
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438 | raise |
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439 | finally: |
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440 | self.lock.release() |
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441 | |
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442 | def terminate(self): |
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443 | self.lock.acquire() |
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444 | try: |
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445 | if self.proc is not None: |
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446 | self.proc.terminate() |
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447 | except: |
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448 | raise |
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449 | finally: |
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450 | self.lock.release() |
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451 | |
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452 | def send_signal(self, signal): |
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453 | self.lock.acquire() |
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454 | try: |
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455 | if self.proc is not None: |
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456 | print "sending sig" |
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457 | self.proc.send_signal(signal) |
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458 | except: |
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459 | raise |
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460 | finally: |
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461 | self.lock.release() |
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462 | |
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463 | class capture_execution(execute): |
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464 | """Capture all output as a string and return it.""" |
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465 | |
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466 | class _output_snapper: |
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467 | def __init__(self, log = None, dump = False): |
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468 | self.output = '' |
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469 | self.log = log |
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470 | self.dump = dump |
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471 | |
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472 | def handler(self, text): |
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473 | if not self.dump: |
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474 | if self.log is not None: |
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475 | self.log.output(text) |
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476 | else: |
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477 | self.output += text |
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478 | |
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479 | def get_and_clear(self): |
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480 | text = self.output |
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481 | self.output = '' |
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482 | return text.strip() |
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483 | |
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484 | def __init__(self, log = None, dump = False, error_prefix = '', verbose = False): |
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485 | self.snapper = capture_execution._output_snapper(log = log, dump = dump) |
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486 | execute.__init__(self, output = self.snapper.handler, |
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487 | error_prefix = error_prefix, |
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488 | verbose = verbose) |
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489 | |
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490 | def open(self, command, capture = True, shell = False, cwd = None, env = None, |
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491 | stdin = None, stdout = None, stderr = None, timeout = None): |
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492 | if not capture: |
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493 | raise error.general('output capture must be true; leave as default') |
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494 | #self.snapper.get_and_clear() |
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495 | exit_code, proc = execute.open(self, command, capture = True, shell = shell, |
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496 | cwd = cwd, env = env, |
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497 | stdin = stdin, stdout = stdout, stderr = stderr, |
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498 | timeout = timeout) |
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499 | return (exit_code, proc, self.snapper.get_and_clear()) |
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500 | |
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501 | def set_output(self, output): |
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502 | raise error.general('output capture cannot be overrided') |
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503 | |
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504 | if __name__ == "__main__": |
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505 | def run_tests(e, commands, use_shell): |
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506 | for c in commands['shell']: |
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507 | e.shell(c) |
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508 | for c in commands['spawn']: |
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509 | e.spawn(c) |
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510 | for c in commands['cmd']: |
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511 | if type(c) is str: |
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512 | e.command(c, shell = use_shell) |
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513 | else: |
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514 | e.command(c[0], c[1], shell = use_shell) |
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515 | for c in commands['csubsts']: |
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516 | e.command_subst(c[0], c[1], shell = use_shell) |
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517 | ec, proc = e.command(commands['pipe'][0], commands['pipe'][1], |
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518 | capture = False, stdin = subprocess.PIPE) |
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519 | if ec == 0: |
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520 | print 'piping input into ' + commands['pipe'][0] + ': ' + \ |
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521 | commands['pipe'][2] |
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522 | proc.stdin.write(commands['pipe'][2]) |
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523 | proc.stdin.close() |
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524 | e.capture(proc) |
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525 | del proc |
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526 | |
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527 | cmd_shell_test = 'if "%OS%" == "Windows_NT" (echo It is WinNT) else echo Is is not WinNT' |
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528 | sh_shell_test = 'x="me"; if [ $x = "me" ]; then echo "It was me"; else "It was him"; fi' |
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529 | |
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530 | commands = {} |
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531 | commands['windows'] = {} |
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532 | commands['unix'] = {} |
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533 | commands['windows']['shell'] = ['cd', 'dir /w', '.\\xyz', cmd_shell_test] |
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534 | commands['windows']['spawn'] = ['hostname', 'hostnameZZ', ['netstat', '/e']] |
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535 | commands['windows']['cmd'] = [('ipconfig'), ('nslookup', 'www.python.org')] |
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536 | commands['windows']['csubsts'] = [('netstat %0', ['-a']), |
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537 | ('netstat %0 %1', ['-a', '-n'])] |
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538 | commands['windows']['pipe'] = ('ftp', None, 'help\nquit') |
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539 | commands['unix']['shell'] = ['pwd', 'ls -las', './xyz', sh_shell_test] |
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540 | commands['unix']['spawn'] = ['ls', 'execute.pyc', ['ls', '-i']] |
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541 | commands['unix']['cmd'] = [('date'), ('date', '-R'), ('date', ['-u', '+%d %D']), |
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542 | ('date', '-u "+%d %D %S"')] |
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543 | commands['unix']['csubsts'] = [('date %0 "+%d %D %S"', ['-u']), |
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544 | ('date %0 %1', ['-u', '+%d %D %S'])] |
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545 | commands['unix']['pipe'] = ('grep', 'hello', 'hello world') |
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546 | |
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547 | print arg_list('cmd a1 a2 "a3 is a string" a4') |
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548 | print arg_list('cmd b1 b2 "b3 is a string a4') |
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549 | print arg_subst(['nothing', 'xx-%0-yyy', '%1', '%2-something'], |
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550 | ['subst0', 'subst1', 'subst2']) |
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551 | |
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552 | e = execute(error_prefix = 'ERR: ', verbose = True) |
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553 | if sys.platform == "win32": |
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554 | run_tests(e, commands['windows'], False) |
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555 | if os.path.exists('c:\\msys\\1.0\\bin\\sh.exe'): |
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556 | e.set_shell('c:\\msys\\1.0\\bin\\sh.exe --login -c') |
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557 | commands['unix']['pipe'] = ('c:\\msys\\1.0\\bin\\grep', |
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558 | 'hello', 'hello world') |
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559 | run_tests(e, commands['unix'], True) |
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560 | else: |
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561 | run_tests(e, commands['unix'], False) |
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562 | del e |
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