Mercurial > libanimone
annotate src/fd/bsd.cc @ 13:efbb8316395f
dep/animone: clean up OS X code
GetProcessName() really belongs in fd.cc after removing the
stupid unnecessary LaunchServices code that was stolen from...
some library :)
| author | Paper <paper@paper.us.eu.org> |
|---|---|
| date | Mon, 13 May 2024 14:15:47 -0400 |
| parents | 52927e5118f9 |
| children | 27b988a1048c |
| rev | line source |
|---|---|
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1 #include "animone/fd/bsd.h" |
| 0 | 2 #include "animone.h" |
| 3 #include "animone/fd.h" | |
| 4 | |
| 5 #include <sys/file.h> | |
| 6 #include <sys/filedesc.h> | |
| 7 #include <sys/param.h> | |
| 8 #include <sys/queue.h> | |
| 9 #include <sys/sysctl.h> | |
| 10 #include <sys/types.h> | |
| 11 #include <sys/user.h> | |
| 12 #include <sys/vnode.h> | |
| 13 | |
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14 #ifdef HAVE_KVM_GETFILES |
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15 # include <kvm.h> |
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16 # include <fts.h> |
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17 #elif defined(LIBUTIL) |
| 0 | 18 # include <libutil.h> |
| 19 #endif | |
| 20 | |
| 21 #include <string> | |
| 22 | |
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23 namespace animone::internal::bsd { |
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24 |
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25 static std::string Basename(const std::string& name) { |
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26 size_t s = name.find_last_of('/'); |
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27 |
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28 if (s == std::string::npos) |
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29 return name; |
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30 |
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31 return name.substr(s, name.size()); |
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32 } |
| 0 | 33 |
| 34 bool GetProcessName(pid_t pid, std::string& name) { | |
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35 #ifdef HAVE_KVM_GETFILES |
| 0 | 36 char errbuf[_POSIX2_LINE_MAX]; |
| 37 kvm_t* kernel = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); | |
| 38 if (!kernel) | |
| 39 return false; | |
| 40 | |
| 41 int entries = 0; | |
| 42 struct kinfo_proc* kinfo = kvm_getprocs(kernel, KERN_PROC_PID, pid, &entries); | |
| 43 if (!kinfo) { | |
| 44 kvm_close(kernel); | |
| 45 return false; | |
| 46 } | |
| 47 | |
| 48 if (entries < 1) { | |
| 49 kvm_close(kernel); | |
| 50 return false; | |
| 51 } | |
| 52 | |
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53 name = Basename(kinfo[0].ki_paddr->p_comm); |
| 0 | 54 |
| 55 return true; | |
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56 #else |
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57 /* use sysctl as a fallback */ |
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58 static const int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, pid}; |
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59 |
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60 struct kinfo_proc result; |
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61 |
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62 size_t length = 1; |
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63 if (sysctl((int*)mib, (sizeof(mib) / sizeof(*mib)) - 1, &result, &length, NULL, 0) == -1) |
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64 return false; |
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65 |
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66 name = Basename(result.ki_comm); |
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67 |
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68 return true; |
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69 #endif |
| 0 | 70 } |
| 71 | |
| 72 /* Most of the BSDs share the common kvm library, | |
| 73 * so accessing this information can be trivial. | |
| 74 */ | |
| 75 bool EnumerateOpenProcesses(process_proc_t process_proc) { | |
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76 #ifdef HAVE_KVM_GETFILES |
| 0 | 77 char errbuf[_POSIX2_LINE_MAX]; |
| 78 kvm_t* kernel = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); | |
| 79 if (!kernel) | |
| 80 return false; | |
| 81 | |
| 82 int entries = 0; | |
| 83 struct kinfo_proc* kinfo = kvm_getprocs(kernel, KERN_PROC_ALL, 0, &entries); | |
| 84 if (!kinfo) { | |
| 85 kvm_close(kernel); | |
| 86 return false; | |
| 87 } | |
| 88 | |
| 89 for (int i = 0; i < entries; i++) { | |
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90 if (!process_proc({kinfo[i].ki_paddr->p_pid, Basename(kinfo[i].ki_paddr->p_comm)})) { |
| 0 | 91 kvm_close(kernel); |
| 92 return false; | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 kvm_close(kernel); | |
| 97 | |
| 98 return true; | |
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99 #else |
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100 /* use sysctl as a fallback */ |
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101 static const int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0}; |
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102 size_t length = 0; |
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103 |
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104 sysctl((int*)mib, (sizeof(mib) / sizeof(*mib)) - 1, NULL, &length, NULL, 0); |
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105 |
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106 std::unique_ptr<struct kinfo_proc[]> result; |
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107 result.reset(new struct kinfo_proc[length]); |
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108 |
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109 if (!result.get()) |
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110 return false; |
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111 |
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112 /* actually get our results */ |
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113 if (sysctl((const int*)mib, (sizeof(mib) / sizeof(*mib)) - 1, result.get(), &length, NULL, 0) == ENOMEM) |
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114 return false; |
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115 |
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116 if (length < sizeof(struct kinfo_proc)) |
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117 return false; |
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118 |
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119 for (int i = 0; i < length / sizeof(result[0]); i++) |
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120 if (!process_proc({result[i].ki_pid, result[i].ki_comm})) |
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121 return false; |
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122 |
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123 return true; |
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124 #endif |
| 0 | 125 } |
| 126 | |
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127 #ifdef HAVE_KVM_GETFILES |
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128 static bool GetOpenFileName(const struct kinfo_file& file, std::string& name) { |
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129 /* OpenBSD doesn't provide a native API for this, so we have |
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130 * to do it ourselves */ |
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131 static constexpr std::string_view root = "/"; |
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132 |
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133 FTS* file_system = fts_open(root.data(), FTS_COMFOLLOW | FTS_NOCHDIR, nullptr); |
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134 if (!file_system) |
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135 return false; |
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136 |
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137 /* Search through the filesystem for a file that matches our |
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138 * kinfo_file structure */ |
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139 FTSENT* parent = nullptr; |
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140 while ((parent = fts_read(file_system))) { |
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141 FTSENT* child = fts_children(file_system, 0); |
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142 while (child && child->fts_link) { |
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143 child = child->fts_link; |
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144 if (!S_ISREG(child->fts_statp->st_mode) || !S_ISLNK(child->fts_statp->st_mode)) |
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145 continue; |
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146 |
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147 if (child->fts_statp->st_dev != file->va_fsid) |
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148 continue; |
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149 |
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150 if (child->fts_statp->st_ino != file->va_fileid) |
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151 continue; |
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152 |
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153 name = std::string(child->fts_path) + child->fts_name; |
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154 fts_close(file_system); |
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155 return true; |
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156 } |
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157 } |
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158 |
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159 fts_close(filesystem); |
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160 return false; |
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161 } |
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162 #endif /* HAVE_KVM_GETFILES */ |
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163 |
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164 bool EnumerateOpenFiles(const std::set<pid_t>& pids, open_file_proc_t open_file_proc) { |
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165 #ifdef HAVE_KVM_GETFILES |
| 0 | 166 char errbuf[_POSIX2_LINE_MAX]; |
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167 kvm_t* kernel = kvm_openfiles(nullptr, nullptr, nullptr, O_RDONLY, errbuf); |
| 0 | 168 if (!kernel) |
| 169 return false; | |
| 170 | |
| 171 for (const auto& pid : pids) { | |
| 172 int cnt; | |
| 173 struct kinfo_file* kfile = kvm_getfiles(kernel, KERN_FILE_BYPID, pid, &cnt); | |
| 174 if (!kfile) { | |
| 175 kvm_close(kernel); | |
| 176 return false; | |
| 177 } | |
| 178 | |
| 179 for (int i = 0; i < cnt; i++) { | |
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180 uint32_t oflags = kfile[i].kf_flags & O_ACCMODE; |
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181 if (oflags == O_WRONLY || oflags == O_RDWR) |
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182 continue; |
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183 |
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184 std::string name; |
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185 if (!GetOpenFileName(kfile[i], name)) |
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186 continue; |
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187 |
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188 if (!open_file_proc({pid, name})) { |
| 0 | 189 kvm_close(kernel); |
| 190 return false; | |
| 191 } | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 kvm_close(kernel); | |
| 196 return true; | |
| 197 #elif defined(LIBUTIL) | |
| 198 for (const auto& pid : pids) { | |
| 199 int cnt; | |
| 200 std::unique_ptr<struct kinfo_file[]> files(kinfo_getfile(pid, &cnt)); | |
| 201 if (!files) | |
| 202 return false; | |
| 203 | |
| 204 for (int i = 0; i < cnt; i++) { | |
| 205 const struct kinfo_file& current = files[i]; | |
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206 if (current.kf_vnode_type != KF_VTYPE_VREG || current.kf_vnode_type != KF_VTYPE_VLNK) |
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207 continue; |
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208 |
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209 const int oflags = current.kf_flags & O_ACCMODE; |
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210 if (oflags == O_WRONLY || oflags == O_RDWR) |
| 0 | 211 continue; |
| 212 | |
| 213 if (!open_file_proc({pid, current.kf_path})) | |
| 214 return false; | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 return true; | |
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219 #else |
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220 /* NetBSD doesn't even provide a real API for this */ |
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221 return false; |
| 0 | 222 #endif |
| 223 } | |
| 224 | |
| 225 } // namespace animone::internal::kvm |