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66 <h1>Source code for nepi.util.environ</h1><div class="highlight"><pre>
67 <span class="c">#</span>
68 <span class="c"># NEPI, a framework to manage network experiments</span>
69 <span class="c"># Copyright (C) 2013 INRIA</span>
70 <span class="c">#</span>
71 <span class="c"># This program is free software: you can redistribute it and/or modify</span>
72 <span class="c"># it under the terms of the GNU General Public License version 2 as</span>
73 <span class="c"># published by the Free Software Foundation;</span>
74 <span class="c">#</span>
75 <span class="c"># This program is distributed in the hope that it will be useful,</span>
76 <span class="c"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
77 <span class="c"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
78 <span class="c"># GNU General Public License for more details.</span>
79 <span class="c">#</span>
80 <span class="c"># You should have received a copy of the GNU General Public License</span>
81 <span class="c"># along with this program. If not, see <http://www.gnu.org/licenses/>.</span>
82 <span class="c">#</span>
83 <span class="c"># Author: Alina Quereilhac <alina.quereilhac@inria.fr></span>
84 <span class="c"># Martin Ferrari <martin.ferrari@inria.fr></span>
88 <span class="kn">import</span> <span class="nn">ctypes</span>
89 <span class="kn">import</span> <span class="nn">imp</span>
90 <span class="kn">import</span> <span class="nn">sys</span>
92 <span class="kn">import</span> <span class="nn">os</span><span class="o">,</span> <span class="nn">os.path</span><span class="o">,</span> <span class="nn">re</span><span class="o">,</span> <span class="nn">signal</span><span class="o">,</span> <span class="nn">shutil</span><span class="o">,</span> <span class="nn">socket</span><span class="o">,</span> <span class="nn">subprocess</span><span class="o">,</span> <span class="nn">tempfile</span>
94 <span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s">"python"</span><span class="p">,</span> <span class="s">"ssh_path"</span><span class="p">]</span>
95 <span class="n">__all__</span> <span class="o">+=</span> <span class="p">[</span><span class="s">"rsh"</span><span class="p">,</span> <span class="s">"tcpdump_path"</span><span class="p">,</span> <span class="s">"sshd_path"</span><span class="p">]</span>
96 <span class="n">__all__</span> <span class="o">+=</span> <span class="p">[</span><span class="s">"execute"</span><span class="p">,</span> <span class="s">"backticks"</span><span class="p">]</span>
99 <span class="c"># Unittest from Python 2.6 doesn't have these decorators</span>
100 <span class="k">def</span> <span class="nf">_bannerwrap</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">text</span><span class="p">):</span>
101 <span class="n">name</span> <span class="o">=</span> <span class="n">f</span><span class="o">.</span><span class="n">__name__</span>
102 <span class="k">def</span> <span class="nf">banner</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
103 <span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="s">"*** WARNING: Skipping test </span><span class="si">%s</span><span class="s">: `</span><span class="si">%s</span><span class="s">'</span><span class="se">\n</span><span class="s">"</span> <span class="o">%</span>
104 <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">text</span><span class="p">))</span>
105 <span class="k">return</span> <span class="bp">None</span>
106 <span class="k">return</span> <span class="n">banner</span>
108 <span class="k">def</span> <span class="nf">skip</span><span class="p">(</span><span class="n">text</span><span class="p">):</span>
109 <span class="k">return</span> <span class="k">lambda</span> <span class="n">f</span><span class="p">:</span> <span class="n">_bannerwrap</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">text</span><span class="p">)</span>
111 <span class="k">def</span> <span class="nf">skipUnless</span><span class="p">(</span><span class="n">cond</span><span class="p">,</span> <span class="n">text</span><span class="p">):</span>
112 <span class="k">return</span> <span class="p">(</span><span class="k">lambda</span> <span class="n">f</span><span class="p">:</span> <span class="n">_bannerwrap</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">text</span><span class="p">))</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">cond</span> <span class="k">else</span> <span class="k">lambda</span> <span class="n">f</span><span class="p">:</span> <span class="n">f</span>
114 <span class="k">def</span> <span class="nf">skipIf</span><span class="p">(</span><span class="n">cond</span><span class="p">,</span> <span class="n">text</span><span class="p">):</span>
115 <span class="k">return</span> <span class="p">(</span><span class="k">lambda</span> <span class="n">f</span><span class="p">:</span> <span class="n">_bannerwrap</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">text</span><span class="p">))</span> <span class="k">if</span> <span class="n">cond</span> <span class="k">else</span> <span class="k">lambda</span> <span class="n">f</span><span class="p">:</span> <span class="n">f</span>
117 <span class="k">def</span> <span class="nf">find_bin</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">extra_path</span> <span class="o">=</span> <span class="bp">None</span><span class="p">):</span>
118 <span class="n">search</span> <span class="o">=</span> <span class="p">[]</span>
119 <span class="k">if</span> <span class="s">"PATH"</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="p">:</span>
120 <span class="n">search</span> <span class="o">+=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="p">[</span><span class="s">"PATH"</span><span class="p">]</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">":"</span><span class="p">)</span>
121 <span class="k">for</span> <span class="n">pref</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"/"</span><span class="p">,</span> <span class="s">"/usr/"</span><span class="p">,</span> <span class="s">"/usr/local/"</span><span class="p">):</span>
122 <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"bin"</span><span class="p">,</span> <span class="s">"sbin"</span><span class="p">):</span>
123 <span class="n">search</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">pref</span> <span class="o">+</span> <span class="n">d</span><span class="p">)</span>
124 <span class="k">if</span> <span class="n">extra_path</span><span class="p">:</span>
125 <span class="n">search</span> <span class="o">+=</span> <span class="n">extra_path</span>
127 <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="n">search</span><span class="p">:</span>
128 <span class="k">try</span><span class="p">:</span>
129 <span class="n">os</span><span class="o">.</span><span class="n">stat</span><span class="p">(</span><span class="n">d</span> <span class="o">+</span> <span class="s">"/"</span> <span class="o">+</span> <span class="n">name</span><span class="p">)</span>
130 <span class="k">return</span> <span class="n">d</span> <span class="o">+</span> <span class="s">"/"</span> <span class="o">+</span> <span class="n">name</span>
131 <span class="k">except</span> <span class="ne">OSError</span><span class="p">,</span> <span class="n">e</span><span class="p">:</span>
132 <span class="k">if</span> <span class="n">e</span><span class="o">.</span><span class="n">errno</span> <span class="o">!=</span> <span class="n">os</span><span class="o">.</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">:</span>
133 <span class="k">raise</span>
134 <span class="k">return</span> <span class="bp">None</span>
136 <span class="k">def</span> <span class="nf">find_bin_or_die</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">extra_path</span> <span class="o">=</span> <span class="bp">None</span><span class="p">):</span>
137 <span class="n">r</span> <span class="o">=</span> <span class="n">find_bin</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
138 <span class="k">if</span> <span class="ow">not</span> <span class="n">r</span><span class="p">:</span>
139 <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">((</span><span class="s">"Cannot find `</span><span class="si">%s</span><span class="s">' command, impossible to "</span> <span class="o">+</span>
140 <span class="s">"continue."</span><span class="p">)</span> <span class="o">%</span> <span class="n">name</span><span class="p">)</span>
141 <span class="k">return</span> <span class="n">r</span>
143 <span class="k">def</span> <span class="nf">find_bin</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">extra_path</span> <span class="o">=</span> <span class="bp">None</span><span class="p">):</span>
144 <span class="n">search</span> <span class="o">=</span> <span class="p">[]</span>
145 <span class="k">if</span> <span class="s">"PATH"</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="p">:</span>
146 <span class="n">search</span> <span class="o">+=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="p">[</span><span class="s">"PATH"</span><span class="p">]</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">":"</span><span class="p">)</span>
147 <span class="k">for</span> <span class="n">pref</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"/"</span><span class="p">,</span> <span class="s">"/usr/"</span><span class="p">,</span> <span class="s">"/usr/local/"</span><span class="p">):</span>
148 <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"bin"</span><span class="p">,</span> <span class="s">"sbin"</span><span class="p">):</span>
149 <span class="n">search</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">pref</span> <span class="o">+</span> <span class="n">d</span><span class="p">)</span>
150 <span class="k">if</span> <span class="n">extra_path</span><span class="p">:</span>
151 <span class="n">search</span> <span class="o">+=</span> <span class="n">extra_path</span>
153 <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="n">search</span><span class="p">:</span>
154 <span class="k">try</span><span class="p">:</span>
155 <span class="n">os</span><span class="o">.</span><span class="n">stat</span><span class="p">(</span><span class="n">d</span> <span class="o">+</span> <span class="s">"/"</span> <span class="o">+</span> <span class="n">name</span><span class="p">)</span>
156 <span class="k">return</span> <span class="n">d</span> <span class="o">+</span> <span class="s">"/"</span> <span class="o">+</span> <span class="n">name</span>
157 <span class="k">except</span> <span class="ne">OSError</span><span class="p">,</span> <span class="n">e</span><span class="p">:</span>
158 <span class="k">if</span> <span class="n">e</span><span class="o">.</span><span class="n">errno</span> <span class="o">!=</span> <span class="n">os</span><span class="o">.</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">:</span>
159 <span class="k">raise</span>
160 <span class="k">return</span> <span class="bp">None</span>
162 <span class="n">ssh_path</span> <span class="o">=</span> <span class="n">find_bin_or_die</span><span class="p">(</span><span class="s">"ssh"</span><span class="p">)</span>
163 <span class="n">python_path</span> <span class="o">=</span> <span class="n">find_bin_or_die</span><span class="p">(</span><span class="s">"python"</span><span class="p">)</span>
165 <span class="c"># Optional tools</span>
166 <span class="n">rsh_path</span> <span class="o">=</span> <span class="n">find_bin</span><span class="p">(</span><span class="s">"rsh"</span><span class="p">)</span>
167 <span class="n">tcpdump_path</span> <span class="o">=</span> <span class="n">find_bin</span><span class="p">(</span><span class="s">"tcpdump"</span><span class="p">)</span>
168 <span class="n">sshd_path</span> <span class="o">=</span> <span class="n">find_bin</span><span class="p">(</span><span class="s">"sshd"</span><span class="p">)</span>
170 <div class="viewcode-block" id="execute"><a class="viewcode-back" href="../../../_layout/nepi.util.html#nepi.util.environ.execute">[docs]</a><span class="k">def</span> <span class="nf">execute</span><span class="p">(</span><span class="n">cmd</span><span class="p">):</span>
171 <span class="c"># FIXME: create a global debug variable</span>
172 <span class="c">#print "[pid %d]" % os.getpid(), " ".join(cmd)</span>
173 <span class="n">null</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="s">"/dev/null"</span><span class="p">,</span> <span class="s">"r+"</span><span class="p">)</span>
174 <span class="n">p</span> <span class="o">=</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">Popen</span><span class="p">(</span><span class="n">cmd</span><span class="p">,</span> <span class="n">stdout</span> <span class="o">=</span> <span class="n">null</span><span class="p">,</span> <span class="n">stderr</span> <span class="o">=</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">PIPE</span><span class="p">)</span>
175 <span class="n">out</span><span class="p">,</span> <span class="n">err</span> <span class="o">=</span> <span class="n">p</span><span class="o">.</span><span class="n">communicate</span><span class="p">()</span>
176 <span class="k">if</span> <span class="n">p</span><span class="o">.</span><span class="n">returncode</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">:</span>
177 <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s">"Error executing `</span><span class="si">%s</span><span class="s">': </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="s">" "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">cmd</span><span class="p">),</span> <span class="n">err</span><span class="p">))</span>
179 <div class="viewcode-block" id="backticks"><a class="viewcode-back" href="../../../_layout/nepi.util.html#nepi.util.environ.backticks">[docs]</a><span class="k">def</span> <span class="nf">backticks</span><span class="p">(</span><span class="n">cmd</span><span class="p">):</span>
180 <span class="n">p</span> <span class="o">=</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">Popen</span><span class="p">(</span><span class="n">cmd</span><span class="p">,</span> <span class="n">stdout</span> <span class="o">=</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">PIPE</span><span class="p">,</span>
181 <span class="n">stderr</span> <span class="o">=</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">PIPE</span><span class="p">)</span>
182 <span class="n">out</span><span class="p">,</span> <span class="n">err</span> <span class="o">=</span> <span class="n">p</span><span class="o">.</span><span class="n">communicate</span><span class="p">()</span>
183 <span class="k">if</span> <span class="n">p</span><span class="o">.</span><span class="n">returncode</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">:</span>
184 <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s">"Error executing `</span><span class="si">%s</span><span class="s">': </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="s">" "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">cmd</span><span class="p">),</span> <span class="n">err</span><span class="p">))</span>
185 <span class="k">return</span> <span class="n">out</span>
188 <span class="c"># SSH stuff</span>
190 <span class="k">def</span> <span class="nf">gen_ssh_keypair</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span>
191 <span class="n">ssh_keygen</span> <span class="o">=</span> <span class="n">nepi</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">find_bin_or_die</span><span class="p">(</span><span class="s">"ssh-keygen"</span><span class="p">)</span>
192 <span class="n">args</span> <span class="o">=</span> <span class="p">[</span><span class="n">ssh_keygen</span><span class="p">,</span> <span class="s">'-q'</span><span class="p">,</span> <span class="s">'-N'</span><span class="p">,</span> <span class="s">''</span><span class="p">,</span> <span class="s">'-f'</span><span class="p">,</span> <span class="n">filename</span><span class="p">]</span>
193 <span class="k">assert</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">Popen</span><span class="p">(</span><span class="n">args</span><span class="p">)</span><span class="o">.</span><span class="n">wait</span><span class="p">()</span> <span class="o">==</span> <span class="mi">0</span>
194 <span class="k">return</span> <span class="n">filename</span><span class="p">,</span> <span class="s">"</span><span class="si">%s</span><span class="s">.pub"</span> <span class="o">%</span> <span class="n">filename</span>
196 <span class="k">def</span> <span class="nf">add_key_to_agent</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span>
197 <span class="n">ssh_add</span> <span class="o">=</span> <span class="n">nepi</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">find_bin_or_die</span><span class="p">(</span><span class="s">"ssh-add"</span><span class="p">)</span>
198 <span class="n">args</span> <span class="o">=</span> <span class="p">[</span><span class="n">ssh_add</span><span class="p">,</span> <span class="n">filename</span><span class="p">]</span>
199 <span class="n">null</span> <span class="o">=</span> <span class="nb">file</span><span class="p">(</span><span class="s">"/dev/null"</span><span class="p">,</span> <span class="s">"w"</span><span class="p">)</span>
200 <span class="k">assert</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">Popen</span><span class="p">(</span><span class="n">args</span><span class="p">,</span> <span class="n">stderr</span> <span class="o">=</span> <span class="n">null</span><span class="p">)</span><span class="o">.</span><span class="n">wait</span><span class="p">()</span> <span class="o">==</span> <span class="mi">0</span>
201 <span class="n">null</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
203 <span class="k">def</span> <span class="nf">get_free_port</span><span class="p">():</span>
204 <span class="n">s</span> <span class="o">=</span> <span class="n">socket</span><span class="o">.</span><span class="n">socket</span><span class="p">()</span>
205 <span class="n">s</span><span class="o">.</span><span class="n">bind</span><span class="p">((</span><span class="s">"127.0.0.1"</span><span class="p">,</span> <span class="mi">0</span><span class="p">))</span>
206 <span class="n">port</span> <span class="o">=</span> <span class="n">s</span><span class="o">.</span><span class="n">getsockname</span><span class="p">()[</span><span class="mi">1</span><span class="p">]</span>
207 <span class="k">return</span> <span class="n">port</span>
209 <span class="n">_SSH_CONF</span> <span class="o">=</span> <span class="s">"""ListenAddress 127.0.0.1:</span><span class="si">%d</span><span class="s"></span>
210 <span class="s">Protocol 2</span>
211 <span class="s">HostKey </span><span class="si">%s</span><span class="s"></span>
212 <span class="s">UsePrivilegeSeparation no</span>
213 <span class="s">PubkeyAuthentication yes</span>
214 <span class="s">PasswordAuthentication no</span>
215 <span class="s">AuthorizedKeysFile </span><span class="si">%s</span><span class="s"></span>
216 <span class="s">UsePAM no</span>
217 <span class="s">AllowAgentForwarding yes</span>
218 <span class="s">PermitRootLogin yes</span>
219 <span class="s">StrictModes no</span>
220 <span class="s">PermitUserEnvironment yes</span>
221 <span class="s">"""</span>
223 <span class="k">def</span> <span class="nf">gen_sshd_config</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="n">server_key</span><span class="p">,</span> <span class="n">auth_keys</span><span class="p">):</span>
224 <span class="n">conf</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s">"w"</span><span class="p">)</span>
225 <span class="n">text</span> <span class="o">=</span> <span class="n">_SSH_CONF</span> <span class="o">%</span> <span class="p">(</span><span class="n">port</span><span class="p">,</span> <span class="n">server_key</span><span class="p">,</span> <span class="n">auth_keys</span><span class="p">)</span>
226 <span class="n">conf</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">text</span><span class="p">)</span>
227 <span class="n">conf</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
228 <span class="k">return</span> <span class="n">filename</span>
230 <span class="k">def</span> <span class="nf">gen_auth_keys</span><span class="p">(</span><span class="n">pubkey</span><span class="p">,</span> <span class="n">output</span><span class="p">,</span> <span class="n">environ</span><span class="p">):</span>
231 <span class="c">#opts = ['from="127.0.0.1/32"'] # fails in stupid yans setup</span>
232 <span class="n">opts</span> <span class="o">=</span> <span class="p">[]</span>
233 <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">environ</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
234 <span class="n">opts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s">'environment="</span><span class="si">%s</span><span class="s">=</span><span class="si">%s</span><span class="s">"'</span> <span class="o">%</span> <span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">))</span>
236 <span class="n">lines</span> <span class="o">=</span> <span class="nb">file</span><span class="p">(</span><span class="n">pubkey</span><span class="p">)</span><span class="o">.</span><span class="n">readlines</span><span class="p">()</span>
237 <span class="n">pubkey</span> <span class="o">=</span> <span class="n">lines</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">split</span><span class="p">()[</span><span class="mi">0</span><span class="p">:</span><span class="mi">2</span><span class="p">]</span>
238 <span class="n">out</span> <span class="o">=</span> <span class="nb">file</span><span class="p">(</span><span class="n">output</span><span class="p">,</span> <span class="s">"w"</span><span class="p">)</span>
239 <span class="n">out</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="s">"</span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="se">\n</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="s">","</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">opts</span><span class="p">),</span> <span class="n">pubkey</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">pubkey</span><span class="p">[</span><span class="mi">1</span><span class="p">]))</span>
240 <span class="n">out</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
241 <span class="k">return</span> <span class="n">output</span>
243 <span class="k">def</span> <span class="nf">start_ssh_agent</span><span class="p">():</span>
244 <span class="n">ssh_agent</span> <span class="o">=</span> <span class="n">nepi</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">find_bin_or_die</span><span class="p">(</span><span class="s">"ssh-agent"</span><span class="p">)</span>
245 <span class="n">proc</span> <span class="o">=</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">Popen</span><span class="p">([</span><span class="n">ssh_agent</span><span class="p">],</span> <span class="n">stdout</span> <span class="o">=</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">PIPE</span><span class="p">)</span>
246 <span class="p">(</span><span class="n">out</span><span class="p">,</span> <span class="n">foo</span><span class="p">)</span> <span class="o">=</span> <span class="n">proc</span><span class="o">.</span><span class="n">communicate</span><span class="p">()</span>
247 <span class="k">assert</span> <span class="n">proc</span><span class="o">.</span><span class="n">returncode</span> <span class="o">==</span> <span class="mi">0</span>
248 <span class="n">d</span> <span class="o">=</span> <span class="p">{}</span>
249 <span class="k">for</span> <span class="n">l</span> <span class="ow">in</span> <span class="n">out</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">):</span>
250 <span class="n">match</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="s">"^(\w+)=([^ ;]+);.*"</span><span class="p">,</span> <span class="n">l</span><span class="p">)</span>
251 <span class="k">if</span> <span class="ow">not</span> <span class="n">match</span><span class="p">:</span>
252 <span class="k">continue</span>
253 <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="o">=</span> <span class="n">match</span><span class="o">.</span><span class="n">groups</span><span class="p">()</span>
254 <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="p">[</span><span class="n">k</span><span class="p">]</span> <span class="o">=</span> <span class="n">v</span>
255 <span class="n">d</span><span class="p">[</span><span class="n">k</span><span class="p">]</span> <span class="o">=</span> <span class="n">v</span>
256 <span class="k">return</span> <span class="n">d</span>
258 <span class="k">def</span> <span class="nf">stop_ssh_agent</span><span class="p">(</span><span class="n">data</span><span class="p">):</span>
259 <span class="c"># No need to gather the pid, ssh-agent knows how to kill itself; after we</span>
260 <span class="c"># had set up the environment</span>
261 <span class="n">ssh_agent</span> <span class="o">=</span> <span class="n">nepi</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">find_bin_or_die</span><span class="p">(</span><span class="s">"ssh-agent"</span><span class="p">)</span>
262 <span class="n">null</span> <span class="o">=</span> <span class="nb">file</span><span class="p">(</span><span class="s">"/dev/null"</span><span class="p">,</span> <span class="s">"w"</span><span class="p">)</span>
263 <span class="n">proc</span> <span class="o">=</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">Popen</span><span class="p">([</span><span class="n">ssh_agent</span><span class="p">,</span> <span class="s">"-k"</span><span class="p">],</span> <span class="n">stdout</span> <span class="o">=</span> <span class="n">null</span><span class="p">)</span>
264 <span class="n">null</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
265 <span class="k">assert</span> <span class="n">proc</span><span class="o">.</span><span class="n">wait</span><span class="p">()</span> <span class="o">==</span> <span class="mi">0</span>
266 <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">data</span><span class="p">:</span>
267 <span class="k">del</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="p">[</span><span class="n">k</span><span class="p">]</span>
273 <div class="clearer"></div>
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