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annotate dep/animia/src/util/osx.cc @ 169:e44b7c428d7c

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dep/animia: add libkvm method (UNTESTED)
author Paper <mrpapersonic@gmail.com>
date Sun, 19 Nov 2023 17:30:38 -0500
parents 8937fb7f2d66
children c413e475f496
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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 #ifdef HAVE_COREFOUNDATION
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7 #include <CoreFoundation/CoreFoundation.h>
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8 #endif
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9
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10 namespace animia::internal::osx::util {
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12 #ifdef HAVE_COREFOUNDATION
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13 /* I don't want to have to call CFRelease */
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14 template<typename T>
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15 struct CFDeleter {
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16 using pointer = T;
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17 void operator()(pointer p) { CFRelease(p); }
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18 }
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19
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20 template<typename T>
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21 typedef CFReference = std::unique_ptr<T, CFDeleter>;
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22
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23 /* all of these LaunchServices things use *internal functions* that are subject
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24 * to change. Granted, it's not very likely that these will change very much
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25 * because I'm fairly sure Apple uses them lots in their own internal code.
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26 */
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27 typedef CFTypeRef (*LSASNCreateWithPidSpec)(CFAllocatorRef, pid_t);
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28 typedef CFDictionaryRef (*LSCopyApplicationInformationSpec)(int, CFTypeRef, CFArrayRef);
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29
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30 static LSCopyApplicationInformationSpec LSCopyApplicationInformation = nullptr;
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31 static LSASNCreateWithPidSpec LSASNCreateWithPid = nullptr;
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32
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33 /* retrieved from LaunchServicesSPI.h in WebKit */
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34 static constexpr int kLSDefaultSessionID = -2;
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36 static const CFStringRef kLaunchServicesBundleID = CFSTR("com.apple.LaunchServices");
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37
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38 /* retrieved dynamically */
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39 static CFStringRef kLSDisplayNameKey = nullptr;
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40 static CFStringRef kLSPIDKey = nullptr;
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41
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42 static bool GetLaunchServicesPrivateSymbols() {
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43 CFBundleRef launch_services_bundle = CFBundleGetBundleWithIdentifier(kLaunchServicesBundleID);
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44 if (!launch_services_bundle)
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45 return false;
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46
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47 LSCopyApplicationInformation = (LSCopyApplicationInformationSpec)CFBundleGetFunctionPointerForName(launch_services_bundle, CFSTR("_LSCopyApplicationInformation"));
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48 if (!LSCopyApplicationInformation)
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49 return false;
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50
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51 LSASNCreateWithPid = (LSASNCreateWithPidSpec)CFBundleGetFunctionPointerForName(launch_services_bundle, CFSTR("_LSASNCreateWithPid"));
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52 if (!LSASNCreateWithPid)
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53 return false;
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54
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55 kLSDisplayNameKey = *(CFStringRef*)CFBundleGetDataPointerForName(launch_services_bundle, CFSTR("_kLSDisplayNameKey"));
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56 if (!kLSDisplayNameKey)
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57 return false;
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58
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59 kLSPIDKey = *(CFStringRef*)CFBundleGetDataPointerForName(launch_services_bundle, CFSTR("_kLSPIDKey"));
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60 if (!kLSPIDKey)
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61 return false;
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62
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63 return true;
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64 }
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66 static bool LaunchServicesGetProcessName(pid_t pid, std::string& result) {
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67 if (!LSCopyApplicationInformation || !LSASNCreateWithPid)
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68 if (!GetLaunchServicesPrivateSymbols())
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69 return false;
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70
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71 CFReference<CFTypeRef> asn = LSASNCreateWithPid(kCFAllocatorDefault, pid);
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72
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73 CFReference<CFArrayRef> request_array = CFArrayCreate(NULL, (const void **)kLSDisplayNameKey, 1, NULL);
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74
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75 CFReference<CFDictionaryRef> dictionary = LSCopyApplicationInformation(kLaunchServicesMagicConstant, asn, request_array.get());
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76 if (!dictionary.get())
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77 return false;
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78
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79 CFReference<CFStringRef> str;
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80 {
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81 CFStringRef rstr;
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82 if (!CFDictionaryGetValueIfPresent(dictionary, kLSDisplayNameKey, (CFTypeRef*)&rstr) || !rstr)
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83 return false;
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84 str.reset(rstr);
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85 }
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86
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87 result.reserve(CFStringGetMaximumSizeForEncoding(CFStringGetLength(str.get()), kCFStringEncodingUTF8) + 1);
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88
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89 if (!CFStringGetCString(str.get(), &result.front(), result.length(), result.length()))
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90 return false;
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91
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92 return true;
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93 }
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94 #endif // HAVE_COREFOUNDATION
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95
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96 static bool GetProcessArgs(pid_t pid, std::string& args) {
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97 /* sysctl shouldn't touch these, so we define them as const */
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98 const int mib[3] = {CTL_KERN, KERN_PROCARGS2, static_cast<int>(pid)};
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99 const size_t mib_size = sizeof(mib)/sizeof(*mib);
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100
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101 /* Get the initial size of the array */
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102 size_t size;
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103 {
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104 int ret = sysctl((int*)mib, mib_size, nullptr, &size, nullptr, 0);
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105 if (ret)
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106 return false;
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107 }
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108
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109 /* Reserve the space for it in args */
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110 args.resize(size);
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111
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112 /* Get the contents of argc and argv */
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113 {
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114 int ret = sysctl((int*)mib, mib_size, &args.front(), &size, NULL, 0);
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115 if (ret)
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116 return false;
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117 }
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118
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119 /* Is the size big enough to hold at least argc? */
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120 if (size < sizeof(int))
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121 return false;
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122
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123 args.resize(size);
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124 }
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125
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126 static bool GetProcessNameFromArgs(pid_t pid, std::string& result) {
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127 if (!GetProcessArgs(pid, result))
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128 return false;
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129
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130 /* Get argc using memcpy */
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131 int argc;
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132 memcpy(&argc, &args.front(), sizeof(argc));
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133
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134 /* Do we even have argv[0]? */
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135 if (argc < 1)
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136 return false;
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137
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138 /* Find the first null character */
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139 size_t null_pos = args.find('\0', sizeof(argc));
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140 if (null_pos == std::string::npos)
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141 return false;
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142
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143 /* Find the last slash */
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144 size_t last_slash = args.rfind('/', null_pos);
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145 if (last_slash == std::string::npos)
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146 return false;
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147
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148 /* Return our result */
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149 result = args.substr(last_slash + 1, null_pos - last_slash - 1);
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150 return true;
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151 }
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152
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153 static bool GetProcessNameFromKernel(pid_t pid, std::string& result) {
165
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154 result.resize(2 * MAXCOMLEN);
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155
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156 int size = proc_name(pid, &result.front(), result.length());
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157 if (!size)
163
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158 return false;
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159
165
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160 result.resize(size);
163
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161 return true;
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162 }
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163
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164 static bool GetProcessName(pid_t pid, std::string& result) {
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165 #ifdef HAVE_COREFOUNDATION
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166 if (LaunchServicesGetProcessName(pid, result))
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167 return true;
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168 #endif // HAVE_COREFOUNDATION
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169
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170 /* Try parsing the arguments, this prevents the process name being
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171 cut off to 2*MAXCOMLEN (32 chars) */
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172 if (GetProcessNameFromArgs(pid, result))
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173 return true;
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174
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175 /* Then attempt getting it from the kernel, which results in the
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176 process name being cut to 32 chars (worse, 16 chars if p_name is
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177 unavailable) */
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178 if (GetProcessNameFromKernel(pid, result))
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179 return true;
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180
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181 return false;
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182 }
162
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183
61b76c7b656a dep/animia: add os x launchservices method
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184 }