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annotate dep/animone/src/fd/bsd.cc @ 278:c41c14ff8c67

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dep/animone: x11: remove debugging comment oops
author Paper <paper@paper.us.eu.org>
date Mon, 22 Apr 2024 19:11:31 -0400
parents 0718f538c5f9
children 65df2813d0de
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1 #include "animone/fd/bsd.h"
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2 #include "animone.h"
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3 #include "animone/fd.h"
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4
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5 #include <sys/file.h>
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6 #include <sys/filedesc.h>
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7 #include <sys/param.h>
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8 #include <sys/queue.h>
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9 #include <sys/sysctl.h>
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10 #include <sys/types.h>
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11 #include <sys/user.h>
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12 #include <sys/vnode.h>
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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)
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18 # include <libutil.h>
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19 #endif
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20
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21 #include <string>
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22 #include <iostream>
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23
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24 namespace animone::internal::bsd {
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25
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26 static std::string Basename(const std::string& name) {
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27 size_t s = name.find_last_of('/');
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28
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29 if (s == std::string::npos)
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30 return name;
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31
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32 return name.substr(s, name.size());
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33 }
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34
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35 bool GetProcessName(pid_t pid, std::string& name) {
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36 #ifdef HAVE_KVM_GETFILES
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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 #else
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58 /* use sysctl as a fallback */
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59 static const int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, pid};
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60
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61 struct kinfo_proc result;
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62
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63 size_t length = 1;
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64 if (sysctl((int*)mib, (sizeof(mib) / sizeof(*mib)) - 1, &result, &length, NULL, 0) == -1)
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65 return false;
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66
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67 name = Basename(result.ki_comm);
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68
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69 return true;
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70 #endif
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71 }
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72
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73 /* Most of the BSDs share the common kvm library,
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74 * so accessing this information can be trivial.
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75 */
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76 bool EnumerateOpenProcesses(process_proc_t process_proc) {
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77 #ifdef HAVE_KVM_GETFILES
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78 char errbuf[_POSIX2_LINE_MAX];
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79 kvm_t* kernel = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
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80 if (!kernel)
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81 return false;
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82
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83 int entries = 0;
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84 struct kinfo_proc* kinfo = kvm_getprocs(kernel, KERN_PROC_ALL, 0, &entries);
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85 if (!kinfo) {
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86 kvm_close(kernel);
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87 return false;
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88 }
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89
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90 for (int i = 0; i < entries; i++) {
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91 if (!process_proc({kinfo[i].ki_paddr->p_pid, Basename(kinfo[i].ki_paddr->p_comm)})) {
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92 kvm_close(kernel);
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93 return false;
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94 }
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95 }
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96
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97 kvm_close(kernel);
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98
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99 return true;
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100 #else
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101 /* use sysctl as a fallback */
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102 static const int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0};
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103 size_t length = 0;
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104
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105 sysctl((int*)mib, (sizeof(mib) / sizeof(*mib)) - 1, NULL, &length, NULL, 0);
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106
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107 std::unique_ptr<struct kinfo_proc[]> result;
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108 result.reset(new struct kinfo_proc[length]);
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109
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110 if (!result.get())
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111 return false;
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112
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113 /* actually get our results */
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114 if (sysctl((const int*)mib, (sizeof(mib) / sizeof(*mib)) - 1, result.get(), &length, NULL, 0) == ENOMEM)
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115 return false;
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116
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117 if (length < sizeof(struct kinfo_proc))
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118 return false;
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119
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120 for (int i = 0; i < length / sizeof(result[0]); i++)
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121 if (!process_proc({result[i].ki_pid, result[i].ki_comm}))
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122 return false;
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123
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124 return true;
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125 #endif
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126 }
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127
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128 #ifdef HAVE_KVM_GETFILES
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129 static bool GetOpenFileName(const struct kinfo_file& file, std::string& name) {
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130 /* OpenBSD doesn't provide a native API for this, so we have
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131 * to do it ourselves */
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132 static constexpr std::string_view root = "/";
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133
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134 FTS* file_system = fts_open(root.data(), FTS_COMFOLLOW | FTS_NOCHDIR, nullptr);
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135 if (!file_system)
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136 return false;
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137
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138 /* Search through the filesystem for a file that matches our
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139 * kinfo_file structure */
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140 FTSENT* parent = nullptr;
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141 while ((parent = fts_read(file_system))) {
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142 FTSENT* child = fts_children(file_system, 0);
0718f538c5f9 dep/animone: filter open files by access mode
Paper <paper@paper.us.eu.org>
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diff changeset
143 while (child && child->fts_link) {
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Paper <paper@paper.us.eu.org>
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diff changeset
144 child = child->fts_link;
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diff changeset
145 if (!S_ISREG(child->fts_statp->st_mode) || !S_ISLNK(child->fts_statp->st_mode))
0718f538c5f9 dep/animone: filter open files by access mode
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parents: 266
diff changeset
146 continue;
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parents: 266
diff changeset
147
0718f538c5f9 dep/animone: filter open files by access mode
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diff changeset
148 if (child->fts_statp->st_dev != file->va_fsid)
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parents: 266
diff changeset
149 continue;
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diff changeset
150
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diff changeset
151 if (child->fts_statp->st_ino != file->va_fileid)
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diff changeset
152 continue;
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diff changeset
153
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154 name = std::string(child->fts_path) + child->fts_name;
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155 fts_close(file_system);
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156 return true;
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diff changeset
157 }
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Paper <paper@paper.us.eu.org>
parents: 266
diff changeset
158 }
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diff changeset
159
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160 fts_close(filesystem);
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161 return false;
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Paper <paper@paper.us.eu.org>
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162 }
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163 #endif /* HAVE_KVM_GETFILES */
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164
266
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Paper <paper@paper.us.eu.org>
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diff changeset
165 bool EnumerateOpenFiles(const std::set<pid_t>& pids, open_file_proc_t open_file_proc) {
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Paper <paper@paper.us.eu.org>
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166 #ifdef HAVE_KVM_GETFILES
258
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167 char errbuf[_POSIX2_LINE_MAX];
270
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168 kvm_t* kernel = kvm_openfiles(nullptr, nullptr, nullptr, O_RDONLY, errbuf);
258
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
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169 if (!kernel)
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
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170 return false;
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Paper <paper@paper.us.eu.org>
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171
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Paper <paper@paper.us.eu.org>
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172 for (const auto& pid : pids) {
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Paper <paper@paper.us.eu.org>
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173 int cnt;
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Paper <paper@paper.us.eu.org>
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174 struct kinfo_file* kfile = kvm_getfiles(kernel, KERN_FILE_BYPID, pid, &cnt);
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Paper <paper@paper.us.eu.org>
parents:
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175 if (!kfile) {
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Paper <paper@paper.us.eu.org>
parents:
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176 kvm_close(kernel);
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Paper <paper@paper.us.eu.org>
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177 return false;
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Paper <paper@paper.us.eu.org>
parents:
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178 }
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Paper <paper@paper.us.eu.org>
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179
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Paper <paper@paper.us.eu.org>
parents:
diff changeset
180 for (int i = 0; i < cnt; i++) {
270
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diff changeset
181 uint32_t oflags = kfile[i].kf_flags & O_ACCMODE;
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182 if (oflags == O_WRONLY || oflags == O_RDWR)
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parents: 266
diff changeset
183 continue;
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diff changeset
184
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diff changeset
185 std::string name;
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diff changeset
186 if (!GetOpenFileName(kfile[i], name))
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parents: 266
diff changeset
187 continue;
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diff changeset
188
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Paper <paper@paper.us.eu.org>
parents: 266
diff changeset
189 if (!open_file_proc({pid, name})) {
258
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
190 kvm_close(kernel);
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Paper <paper@paper.us.eu.org>
parents:
diff changeset
191 return false;
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
192 }
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Paper <paper@paper.us.eu.org>
parents:
diff changeset
193 }
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Paper <paper@paper.us.eu.org>
parents:
diff changeset
194 }
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Paper <paper@paper.us.eu.org>
parents:
diff changeset
195
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Paper <paper@paper.us.eu.org>
parents:
diff changeset
196 kvm_close(kernel);
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Paper <paper@paper.us.eu.org>
parents:
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197 return true;
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Paper <paper@paper.us.eu.org>
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diff changeset
198 #elif defined(LIBUTIL)
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Paper <paper@paper.us.eu.org>
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199 for (const auto& pid : pids) {
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Paper <paper@paper.us.eu.org>
parents:
diff changeset
200 int cnt;
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
201 std::unique_ptr<struct kinfo_file[]> files(kinfo_getfile(pid, &cnt));
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
202 if (!files)
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
203 return false;
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
204
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
205 for (int i = 0; i < cnt; i++) {
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
206 const struct kinfo_file& current = files[i];
270
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diff changeset
207 if (current.kf_vnode_type != KF_VTYPE_VREG || current.kf_vnode_type != KF_VTYPE_VLNK)
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parents: 266
diff changeset
208 continue;
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diff changeset
209
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210 const int oflags = current.kf_flags & O_ACCMODE;
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diff changeset
211 if (oflags == O_WRONLY || oflags == O_RDWR)
258
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
212 continue;
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
213
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Paper <paper@paper.us.eu.org>
parents:
diff changeset
214 if (!open_file_proc({pid, current.kf_path}))
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
215 return false;
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
216 }
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
217 }
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
218
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
219 return true;
266
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Paper <paper@paper.us.eu.org>
parents: 258
diff changeset
220 #else
270
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Paper <paper@paper.us.eu.org>
parents: 266
diff changeset
221 /* NetBSD doesn't even provide a real API for this */
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Paper <paper@paper.us.eu.org>
parents: 266
diff changeset
222 return false;
258
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
223 #endif
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
224 }
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
225
862d0d8619f6 *: HUUUGE changes
Paper <paper@paper.us.eu.org>
parents:
diff changeset
226 } // namespace animone::internal::kvm