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<a href="utils_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * MUSCLE SmartCard Development ( http://pcsclite.alioth.debian.org/pcsclite.html )</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Copyright (C) 2006-2011</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * Ludovic Rousseau <ludovic.rousseau@free.fr></span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">Redistribution and use in source and binary forms, with or without</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">modification, are permitted provided that the following conditions</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">are met:</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"></span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">1. Redistributions of source code must retain the above copyright</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> notice, this list of conditions and the following disclaimer.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">2. Redistributions in binary form must reproduce the above copyright</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> notice, this list of conditions and the following disclaimer in the</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> documentation and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">3. The name of the author may not be used to endorse or promote products</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> derived from this software without specific prior written permission.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"></span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">Changes to this license can be made only by the copyright author with</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">explicit written consent.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"></span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * $Id: utils.c 6851 2014-02-14 15:43:32Z rousseau $</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include <sys/types.h></span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include <unistd.h></span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include <errno.h></span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include <string.h></span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include <signal.h></span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include <dirent.h></span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include <fcntl.h></span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include <pthread.h></span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include "config.h"</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#include "<a class="code" href="debuglog_8h.html">debuglog.h</a>"</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#include "utils.h"</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#include "<a class="code" href="pcscd_8h.html">pcscd.h</a>"</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#include "<a class="code" href="sys__generic_8h.html">sys_generic.h</a>"</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> pid_t GetDaemonPid(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> {</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordtype">int</span> fd;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  pid_t pid;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">/* pids are only 15 bits but 4294967296</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * (32 bits in case of a new system use it) is on 10 bytes</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  fd = open(PCSCLITE_RUN_PID, O_RDONLY);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">if</span> (fd >= 0)</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordtype">char</span> pid_ascii[PID_ASCII_SIZE];</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  ssize_t r;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  r = read(fd, pid_ascii, <span class="keyword">sizeof</span> pid_ascii);</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">if</span> (r < 0)</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  {</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  Log2(PCSC_LOG_CRITICAL, <span class="stringliteral">"Reading "</span> PCSCLITE_RUN_PID <span class="stringliteral">" failed: %s"</span>,</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  strerror(errno));</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  pid = -1;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  }</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  pid = atoi(pid_ascii);</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  (void)close(fd);</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  }</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  Log2(PCSC_LOG_CRITICAL, <span class="stringliteral">"Can't open "</span> PCSCLITE_RUN_PID <span class="stringliteral">": %s"</span>,</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  strerror(errno));</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  }</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">return</span> pid;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> } <span class="comment">/* GetDaemonPid */</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="keywordtype">int</span> SendHotplugSignal(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> {</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  pid_t pid;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  pid = GetDaemonPid();</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (pid != -1)</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  {</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  Log2(PCSC_LOG_INFO, <span class="stringliteral">"Send hotplug signal to pcscd (pid=%d)"</span>, pid);</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">if</span> (kill(pid, SIGUSR1) < 0)</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  {</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  Log3(PCSC_LOG_CRITICAL, <span class="stringliteral">"Can't signal pcscd (pid=%d): %s"</span>,</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  pid, strerror(errno));</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">return</span> EXIT_FAILURE ;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  (void)<a class="code" href="sys__generic_8h.html#abbd906a9a16166248e32862f67fc49cd">SYS_Sleep</a>(1);</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  }</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">return</span> EXIT_SUCCESS;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> } <span class="comment">/* SendHotplugSignal */</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div>
<div class="line"><a name="l00122"></a><span class="lineno"><a class="line" href="utils_8c.html#a6c89a6b233096b6a80880c82886f380b"> 122</a></span> <span class="preprocessor">#define OPENCT_FILE "/var/run/openct/status"</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="keywordtype">int</span> CheckForOpenCT(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keyword">struct </span>stat buf;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">if</span> (0 == stat(<a class="code" href="utils_8c.html#a6c89a6b233096b6a80880c82886f380b">OPENCT_FILE</a>, &buf))</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  {</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  Log1(PCSC_LOG_CRITICAL, <span class="stringliteral">"File "</span> <a class="code" href="utils_8c.html#a6c89a6b233096b6a80880c82886f380b">OPENCT_FILE</a> <span class="stringliteral">" found. Remove OpenCT and try again"</span>);</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  }</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> } <span class="comment">/* CheckForOpenCT */</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div>
<div class="line"><a name="l00140"></a><span class="lineno"><a class="line" href="utils_8c.html#a470f4ac4abe231a7b3346be4fe455912"> 140</a></span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> <a class="code" href="utils_8c.html#a470f4ac4abe231a7b3346be4fe455912">time_sub</a>(<span class="keyword">struct</span> timeval *a, <span class="keyword">struct</span> timeval *b)</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keyword">struct </span>timeval r;</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  r.tv_sec = a -> tv_sec - b -> tv_sec;</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  r.tv_usec = a -> tv_usec - b -> tv_usec;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">if</span> (r.tv_usec < 0)</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  {</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  r.tv_sec--;</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  r.tv_usec += 1000000;</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">return</span> r.tv_sec * 1000000 + r.tv_usec;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> } <span class="comment">/* time_sub */</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="keywordtype">int</span> ThreadCreate(pthread_t * pthThread, <span class="keywordtype">int</span> attributes,</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  PCSCLITE_THREAD_FUNCTION(pvFunction), LPVOID pvArg)</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> {</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  pthread_attr_t attr;</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  ret = pthread_attr_init(&attr);</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span> (ret)</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">return</span> ret;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  ret = pthread_attr_setdetachstate(&attr,</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  attributes & THREAD_ATTR_DETACHED ? PTHREAD_CREATE_DETACHED : PTHREAD_CREATE_JOINABLE);</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span> (ret)</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  {</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  (void)pthread_attr_destroy(&attr);</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">return</span> ret;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  ret = pthread_create(pthThread, &attr, pvFunction, pvArg);</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">if</span> (ret)</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">return</span> ret;</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  ret = pthread_attr_destroy(&attr);</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">return</span> ret;</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> }</div>
<div class="ttc" id="utils_8c_html_a6c89a6b233096b6a80880c82886f380b"><div class="ttname"><a href="utils_8c.html#a6c89a6b233096b6a80880c82886f380b">OPENCT_FILE</a></div><div class="ttdeci">#define OPENCT_FILE</div><div class="ttdoc">Check is OpenCT is running and display a critical message if it is. </div><div class="ttdef"><b>Definition:</b> <a href="utils_8c_source.html#l00122">utils.c:122</a></div></div>
<div class="ttc" id="sys__generic_8h_html"><div class="ttname"><a href="sys__generic_8h.html">sys_generic.h</a></div><div class="ttdoc">This handles abstract system level calls. </div></div>
<div class="ttc" id="sys__generic_8h_html_abbd906a9a16166248e32862f67fc49cd"><div class="ttname"><a href="sys__generic_8h.html#abbd906a9a16166248e32862f67fc49cd">SYS_Sleep</a></div><div class="ttdeci">int SYS_Sleep(int)</div><div class="ttdoc">Makes the current process sleep for some seconds. </div><div class="ttdef"><b>Definition:</b> <a href="sys__unix_8c_source.html#l00070">sys_unix.c:70</a></div></div>
<div class="ttc" id="utils_8c_html_a470f4ac4abe231a7b3346be4fe455912"><div class="ttname"><a href="utils_8c.html#a470f4ac4abe231a7b3346be4fe455912">time_sub</a></div><div class="ttdeci">long int time_sub(struct timeval *a, struct timeval *b)</div><div class="ttdoc">return the difference (as long int) in µs between 2 struct timeval r = a - b </div><div class="ttdef"><b>Definition:</b> <a href="utils_8c_source.html#l00140">utils.c:140</a></div></div>
<div class="ttc" id="pcscd_8h_html"><div class="ttname"><a href="pcscd_8h.html">pcscd.h</a></div><div class="ttdoc">This keeps a list of defines for pcsc-lite. </div></div>
<div class="ttc" id="debuglog_8h_html"><div class="ttname"><a href="debuglog_8h.html">debuglog.h</a></div><div class="ttdoc">This handles debugging. </div></div>
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