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annotate dep/animia/src/fd/kvm.cc @ 198:bc1ae1810855

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dep/animia: switch from using classes to global functions the old idea was ok, but sort of hackish; this method doesn't use classes at all, and this way (especially important!) we can do wayland stuff AND x11 at the same time, which wasn't really possible without stupid workarounds in the other method
author Paper <mrpapersonic@gmail.com>
date Sun, 24 Dec 2023 02:59:42 -0500
parents e44b7c428d7c
children 8f6f8dd2eb23
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169
e44b7c428d7c dep/animia: add libkvm method (UNTESTED)
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1 /* kvm.cc: provides support for libkvm in multiple BSDs
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2 **
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3 ** this is really the only way to get a thing that works on
e44b7c428d7c dep/animia: add libkvm method (UNTESTED)
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4 ** OpenBSD AND NetBSD.
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5 **
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6 ** Much of this file is taken from the fstat source code in
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7 ** NetBSD.
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8 */
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9
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10 #include <kvm.h>
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11
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12 namespace animia::internal::kvm {
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13
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14 static bool GetFilename(kvm_t* kvm, struct vnode *vp, std::string& name) {
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15 struct vnode vn;
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16 if (!kvm_read(kvm, vp, &vn, sizeof(*vn)))
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17 return 0;
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18
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19 struct filestat fst;
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20 const char* type = vfilestat(vn, &fst);
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21 if (type == dead)
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22 return false;
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23
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24 for (DEVS* d = devs; d != NULL; d = d->next) {
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25 if (d->fsid == fst->fsid && d->ino == fst->fileid) {
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26 name = d->name;
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27 break;
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28 }
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29 }
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30
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31 return true;
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32 }
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33
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34 static bool GetFilePath(kvm_t* kvm, fdfile_t* fp, std::string& path) {
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35 struct file file;
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36 fdfile_t fdfile;
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37
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38 if (!kvm_read(kvm, fp, &fdfile, sizeof(fdfile)))
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39 return false;
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40
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41 if (!fdfile.ff_file)
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42 return false;
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43
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44 if (!kvm_read(fdfile.ff_file, &file, sizeof(file)))
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45 return false;
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46
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47 if (file.f_type != DTYPE_VNODE)
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48 return false;
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49
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50 return GetFilename(kvm, file.f_data, path);
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51 }
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52
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53 static bool OpenFiles(kvm_t* kvm, struct kinfo_proc* p, open_file_proc_t open_file_proc) {
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54 if (p->proc->p_fd == 0 || p->proc->p_cwdi == 0)
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55 return false;
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56
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57 struct filedesc filed;
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58 if (!kvm_read(kvm, p->proc->p_fd, &filed, sizeof(filed)))
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59 return false;
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60
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61 if (filed.fd_lastfile == -1)
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62 return false;
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63
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64 struct cwdinfo cwdi;
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65 if (!kvm_read(kvm, p->proc->p_cwdi, &cwdi, sizeof(cwdi)))
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66 return false;
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67
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68 struct fdtab dt;
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69 if (!kvm_read(kvm, filed.fd_dt, &dt, sizeof(dt)))
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70 return false;
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71
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72 /* check for corrupted files? */
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73 if ((unsigned)filed.fd_lastfile >= dt.dt_nfiles || filed.fd_freefile > filed.fd_lastfile + 1)
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74 return false;
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75
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76 /* open files */
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77 std::unique_ptr<fdfile_t*[]> ofiles = nullptr;
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78 {
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79 ofiles.reset(malloc((filed.fd_lastfile + 1) * sizeof(fdfile_t*)));
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80 if (!ofiles.get())
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81 return false;
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82 }
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83
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84 if (!kvm_read(kvm, &filed.fd_dt->dt_ff, ofiles.get(), filed.fd_lastfile + 1 * (sizeof(fdfile_t*))))
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85 return false;
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86
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87 for (int i = 0; i <= filed.fd_lastfile; i++) {
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88 if (!ofiles[i])
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89 continue;
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90 std::string name;
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91 GetFilePath(kvm, ofiles[i], name);
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92 if (!open_file_proc(p->proc->p_pid, name))
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93 return false;
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94 }
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95
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96 return true;
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97 }
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98
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99 bool EnumerateOpenProcesses(process_proc_t process_proc) {
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100 char errbuf[_POSIX2_LINE_MAX];
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101 kvm_t* kernel = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf);
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102 if (!kernel)
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103 return false;
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104
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105 int entries = 0;
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106 struct kinfo_proc* kinfo = kvm_getprocs(kernel, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc), &nentries);
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107 if (!kinfo)
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108 return false;
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109
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110 for (int i = 0; i < entries; i++)
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111 if (!process_proc({kinfo[i].p_pid, kinfo[i].p_comm}))
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112 return false;
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113
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114 return true;
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115 }
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116
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117 bool EnumerateOpenFiles(std::set<pid_t>& pids, open_file_proc_t open_file_proc) {
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118 kvm_t* kernel = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf);
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119 if (!kernel)
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120 return false;
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121
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122 for (const auto& pid : pids) {
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123 int cnt;
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124 struct kinfo_proc* kinfo = kvm_getprocs(kernel, KERN_PROC_PID, pid, &cnt);
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125 if (!kinfo)
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126 return false;
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127
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128 for (int i = 0; i < cnt; i++) {
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129 OpenFiles(kernel, kinfo, open_file_proc);
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130 }
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131 }
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132 }
e44b7c428d7c dep/animia: add libkvm method (UNTESTED)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
133
e44b7c428d7c dep/animia: add libkvm method (UNTESTED)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
134 }