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annotate dep/animone/src/fd/openbsd.cc @ 354:9aaf1e788896

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core/endian: fix compile error under clang
author Paper <paper@paper.us.eu.org>
date Sun, 14 Jul 2024 23:39:42 -0400
parents f63dfa309380
children
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338
f63dfa309380 dep/animone: separate *BSD into separate files
Paper <paper@paper.us.eu.org>
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1 /*
f63dfa309380 dep/animone: separate *BSD into separate files
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2 * fd/openbsd.cc: support for OpenBSD
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Paper <paper@paper.us.eu.org>
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3 *
f63dfa309380 dep/animone: separate *BSD into separate files
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4 * COMPLETELY UNTESTED. may or may not work.
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5 */
f63dfa309380 dep/animone: separate *BSD into separate files
Paper <paper@paper.us.eu.org>
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6 #include "animone/fd/bsd.h"
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7 #include "animone.h"
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Paper <paper@paper.us.eu.org>
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8 #include "animone/fd.h"
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9
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10 #include <sys/file.h>
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Paper <paper@paper.us.eu.org>
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11 #include <sys/filedesc.h>
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Paper <paper@paper.us.eu.org>
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12 #include <sys/param.h>
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13 #include <sys/queue.h>
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14 #include <sys/sysctl.h>
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15 #include <sys/types.h>
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16 #include <sys/user.h>
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17 #include <sys/vnode.h>
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18
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19 #include <kvm.h>
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20 #include <fts.h>
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21
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22 #include <string>
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23
f63dfa309380 dep/animone: separate *BSD into separate files
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24 namespace animone::internal::openbsd {
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25
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26 /* XXX is this necessary */
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27 static std::string Basename(const std::string& name) {
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28 size_t s = name.find_last_of('/');
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29
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30 if (s == std::string::npos)
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31 return name;
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32
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33 return name.substr(s, name.size());
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34 }
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35
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36 bool GetProcessName(pid_t pid, std::string& name) {
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37 char errbuf[_POSIX2_LINE_MAX];
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38 kvm_t* kernel = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
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39 if (!kernel)
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40 return false;
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41
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42 int entries = 0;
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43 struct kinfo_proc* kinfo = kvm_getprocs(kernel, KERN_PROC_PID, pid, &entries);
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44 if (!kinfo) {
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45 kvm_close(kernel);
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46 return false;
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47 }
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48
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49 if (entries < 1) {
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50 kvm_close(kernel);
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51 return false;
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52 }
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53
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54 name = Basename(kinfo[0].ki_paddr->p_comm);
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55
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56 return true;
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57 }
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58
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59 bool EnumerateOpenProcesses(process_proc_t process_proc) {
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60 char errbuf[_POSIX2_LINE_MAX];
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61 kvm_t* kernel = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
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62 if (!kernel)
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63 return false;
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64
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65 int entries = 0;
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66 struct kinfo_proc* kinfo = kvm_getprocs(kernel, KERN_PROC_ALL, 0, &entries);
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67 if (!kinfo) {
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68 kvm_close(kernel);
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69 return false;
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70 }
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71
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72 for (int i = 0; i < entries; i++) {
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73 if (!process_proc({.platform = ExecutablePlatform::Posix, .pid = kinfo[i].ki_paddr->p_pid, .comm = Basename(kinfo[i].ki_paddr->p_comm)})) {
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74 kvm_close(kernel);
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75 return false;
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76 }
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77 }
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78
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79 kvm_close(kernel);
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80
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81 return true;
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82 }
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83
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84 static bool GetOpenFileName(const struct kinfo_file& file, std::string& name) {
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85 /* OpenBSD doesn't provide a native API for this, so we have
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86 * to do it ourselves */
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87 static constexpr std::string_view root = "/";
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88
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89 FTS* file_system = fts_open(root.data(), FTS_COMFOLLOW | FTS_NOCHDIR, nullptr);
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90 if (!file_system)
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91 return false;
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92
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93 /* Search through the filesystem for a file that matches our
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94 * kinfo_file structure */
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95 FTSENT* parent = nullptr;
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96 while ((parent = fts_read(file_system))) {
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97 FTSENT* child = fts_children(file_system, 0);
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98 while (child && child->fts_link) {
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99 child = child->fts_link;
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100 if (!S_ISREG(child->fts_statp->st_mode) || !S_ISLNK(child->fts_statp->st_mode))
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101 continue;
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102
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103 if (child->fts_statp->st_dev != file->va_fsid)
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104 continue;
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105
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106 if (child->fts_statp->st_ino != file->va_fileid)
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107 continue;
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108
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109 name = std::string(child->fts_path) + child->fts_name;
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110 fts_close(file_system);
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111 return true;
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112 }
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113 }
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114
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115 fts_close(filesystem);
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116 return false;
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117 }
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118
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119 bool EnumerateOpenFiles(const std::set<pid_t>& pids, open_file_proc_t open_file_proc) {
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120 char errbuf[_POSIX2_LINE_MAX];
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121 kvm_t* kernel = kvm_openfiles(nullptr, nullptr, nullptr, O_RDONLY, errbuf);
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122 if (!kernel)
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123 return false;
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124
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125 for (const auto& pid : pids) {
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126 int cnt;
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127 struct kinfo_file* kfile = kvm_getfiles(kernel, KERN_FILE_BYPID, pid, &cnt);
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128 if (!kfile) {
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129 kvm_close(kernel);
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130 return false;
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131 }
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132
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133 for (int i = 0; i < cnt; i++) {
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134 uint32_t oflags = kfile[i].kf_flags & O_ACCMODE;
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135 if (oflags == O_WRONLY || oflags == O_RDWR)
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136 continue;
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137
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138 std::string name;
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139 if (!GetOpenFileName(kfile[i], name))
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140 continue;
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141
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142 if (!open_file_proc({pid, name})) {
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143 kvm_close(kernel);
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144 return false;
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145 }
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146 }
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147 }
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148
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149 kvm_close(kernel);
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150 return true;
f63dfa309380 dep/animone: separate *BSD into separate files
Paper <paper@paper.us.eu.org>
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151 }
f63dfa309380 dep/animone: separate *BSD into separate files
Paper <paper@paper.us.eu.org>
parents:
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152
f63dfa309380 dep/animone: separate *BSD into separate files
Paper <paper@paper.us.eu.org>
parents:
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153 } // namespace animone::internal::openbsd