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annotate dep/animia/src/util/osx.cc @ 189:649786bae914

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*: etc. code cleanup I've removed most macros and stuff dep/animia: [UNTESTED] use raw C++ instead of Objective-C++
author Paper <mrpapersonic@gmail.com>
date Wed, 06 Dec 2023 19:42:33 -0500
parents c413e475f496
children 2d5823df870f
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1 #include "animia/util/osx.h"
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2
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3 #include <string>
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4 #include <memory>
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5
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6 namespace animia::internal::osx::util {
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7
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8 #ifdef HAVE_COREFOUNDATION
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9 /* all of these LaunchServices things use *internal functions* that are subject
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10 * to change. Granted, it's not very likely that these will change very much
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11 * because I'm fairly sure Apple uses them lots in their own internal code.
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12 */
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13 typedef CFTypeRef (*LSASNCreateWithPidSpec)(CFAllocatorRef, pid_t);
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14 typedef CFDictionaryRef (*LSCopyApplicationInformationSpec)(int, CFTypeRef, CFArrayRef);
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15
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16 static LSCopyApplicationInformationSpec LSCopyApplicationInformation = nullptr;
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17 static LSASNCreateWithPidSpec LSASNCreateWithPid = nullptr;
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18
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19 /* retrieved from LaunchServicesSPI.h in WebKit */
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20 static constexpr int kLSDefaultSessionID = -2;
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21
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22 static const CFStringRef kLaunchServicesBundleID = CFSTR("com.apple.LaunchServices");
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24 /* retrieved dynamically */
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25 static CFStringRef kLSDisplayNameKey = nullptr;
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26 static CFStringRef kLSPIDKey = nullptr;
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27
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28 static bool GetLaunchServicesPrivateSymbols() {
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29 CFBundleRef launch_services_bundle = CFBundleGetBundleWithIdentifier(kLaunchServicesBundleID);
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30 if (!launch_services_bundle)
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31 return false;
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32
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33 LSCopyApplicationInformation = (LSCopyApplicationInformationSpec)CFBundleGetFunctionPointerForName(launch_services_bundle, CFSTR("_LSCopyApplicationInformation"));
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34 if (!LSCopyApplicationInformation)
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35 return false;
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36
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37 LSASNCreateWithPid = (LSASNCreateWithPidSpec)CFBundleGetFunctionPointerForName(launch_services_bundle, CFSTR("_LSASNCreateWithPid"));
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38 if (!LSASNCreateWithPid)
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39 return false;
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41 kLSDisplayNameKey = *(CFStringRef*)CFBundleGetDataPointerForName(launch_services_bundle, CFSTR("_kLSDisplayNameKey"));
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42 if (!kLSDisplayNameKey)
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43 return false;
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44
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45 kLSPIDKey = *(CFStringRef*)CFBundleGetDataPointerForName(launch_services_bundle, CFSTR("_kLSPIDKey"));
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46 if (!kLSPIDKey)
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47 return false;
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48
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49 return true;
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50 }
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52 static bool LaunchServicesGetProcessName(pid_t pid, std::string& result) {
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53 if (!LSCopyApplicationInformation || !LSASNCreateWithPid)
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54 if (!GetLaunchServicesPrivateSymbols())
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55 return false;
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56
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57 CFReference<CFTypeRef> asn = LSASNCreateWithPid(kCFAllocatorDefault, pid);
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59 CFReference<CFArrayRef> request_array = CFArrayCreate(NULL, (const void **)kLSDisplayNameKey, 1, NULL);
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61 CFReference<CFDictionaryRef> dictionary = LSCopyApplicationInformation(kLaunchServicesMagicConstant, asn, request_array.get());
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62 if (!dictionary.get())
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63 return false;
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65 CFReference<CFStringRef> str;
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66 {
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67 CFStringRef rstr;
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68 if (!CFDictionaryGetValueIfPresent(dictionary, kLSDisplayNameKey, (CFTypeRef*)&rstr) || !rstr)
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69 return false;
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70 str.reset(rstr);
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71 }
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72
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73 result.resize(CFStringGetMaximumSizeForEncoding(CFStringGetLength(str.get()), kCFStringEncodingUTF8) + 1);
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74
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75 if (!CFStringGetCString(str.get(), &result.front(), result.length(), result.length()))
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76 return false;
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77
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78 result.resize(result.find('\0'));
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79
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80 return true;
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81 }
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82
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83 bool StringFromCFString(CFStringRef string, std::string& result) {
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84 if (!string)
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85 return false;
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86
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87 result.resize(CFStringGetMaximumSizeForEncoding(CFStringGetLength(str.get()), kCFStringEncodingUTF8) + 1);
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88 if (!CFStringGetCString(str.get(), &result.front(), result.length(), result.length()))
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89 return false;
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90
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91 return true;
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92 }
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93 #endif // HAVE_COREFOUNDATION
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94
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95 static bool GetProcessArgs(pid_t pid, std::string& args) {
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96 /* sysctl shouldn't touch these, so we define them as const */
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97 const int mib[3] = {CTL_KERN, KERN_PROCARGS2, static_cast<int>(pid)};
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98 const size_t mib_size = sizeof(mib)/sizeof(*mib);
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99
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100 /* Get the initial size of the array
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101 *
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102 * NOTE: it IS possible for this value to change inbetween calls to sysctl().
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103 * Unfortunately, I couldn't care less about handling this. :)
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104 */
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105 size_t size;
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106 {
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107 int ret = sysctl((int*)mib, mib_size, nullptr, &size, nullptr, 0);
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108 if (ret)
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109 return false;
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110 }
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111
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112 /* Reserve the space for it in args */
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113 args.resize(size);
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114
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115 /* Get the contents of argc and argv */
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116 {
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117 int ret = sysctl((int*)mib, mib_size, &args.front(), &size, NULL, 0);
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118 if (ret)
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119 return false;
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120 }
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121
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122 /* Is the size big enough to hold at least argc? */
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123 if (size < sizeof(int))
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124 return false;
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125
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126 args.resize(size);
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127 }
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128
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129 static bool GetProcessNameFromArgs(pid_t pid, std::string& result) {
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130 if (!GetProcessArgs(pid, result))
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131 return false;
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132
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133 /* Get argc using memcpy */
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134 int argc;
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135 memcpy(&argc, &args.front(), sizeof(argc));
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136
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137 /* Do we even have argv[0]? */
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138 if (argc < 1)
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139 return false;
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140
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141 /* Find the first null character */
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142 size_t null_pos = args.find('\0', sizeof(argc));
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143 if (null_pos == std::string::npos)
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144 return false;
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145
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146 /* Find the last slash */
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147 size_t last_slash = args.rfind('/', null_pos);
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148 if (last_slash == std::string::npos)
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149 return false;
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150
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151 /* Return our result */
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152 result = args.substr(last_slash + 1, null_pos - last_slash - 1);
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153 return true;
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154 }
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155
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156 static bool GetProcessNameFromKernel(pid_t pid, std::string& result) {
165
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157 result.resize(2 * MAXCOMLEN);
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158
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159 int size = proc_name(pid, &result.front(), result.length());
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160 if (!size)
163
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161 return false;
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162
165
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163 result.resize(size);
163
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164 return true;
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165 }
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166
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167 static bool GetProcessName(pid_t pid, std::string& result) {
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168 #ifdef HAVE_COREFOUNDATION
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169 if (LaunchServicesGetProcessName(pid, result))
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170 return true;
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171 #endif // HAVE_COREFOUNDATION
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172
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173 /* Try parsing the arguments, this prevents the process name being
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174 cut off to 2*MAXCOMLEN (32 chars) */
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175 if (GetProcessNameFromArgs(pid, result))
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176 return true;
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177
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178 /* Then attempt getting it from the kernel, which results in the
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179 process name being cut to 32 chars (worse, 16 chars if p_name is
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180 unavailable) */
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181 if (GetProcessNameFromKernel(pid, result))
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182 return true;
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183
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184 return false;
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185 }
162
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186
61b76c7b656a dep/animia: add os x launchservices method
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187 }