Mercurial > minori

annotate dep/animia/src/fd/proc.cc @ 181:d26cd2c00270

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
dep/animia/fd/proc: use constexpr std::string_view for proc location this is probably a little slower, but it works Well Enough for what we need it for
author Paper <mrpapersonic@gmail.com>
date Mon, 04 Dec 2023 12:14:30 -0500
parents 5be17d636aee
children c413e475f496
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
166
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
1 #include "animia/fd/proc.h"
152
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
2 #include "animia.h"
156
cdf79282d647 dep/animia: add VERY early x11 window stuff
Paper <mrpapersonic@gmail.com>
parents: 154
diff changeset
3 #include "animia/util.h"
140
1e696863b54c dep/animia: remove superfluous includes
Paper <mrpapersonic@gmail.com>
parents: 139
diff changeset
4
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
5 #include <algorithm>
156
cdf79282d647 dep/animia: add VERY early x11 window stuff
Paper <mrpapersonic@gmail.com>
parents: 154
diff changeset
6 #include <cstring>
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
7 #include <filesystem>
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
8 #include <fstream>
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
9 #include <sstream>
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
10 #include <string>
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
11 #include <unordered_map>
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
12 #include <vector>
140
1e696863b54c dep/animia: remove superfluous includes
Paper <mrpapersonic@gmail.com>
parents: 139
diff changeset
13
156
cdf79282d647 dep/animia: add VERY early x11 window stuff
Paper <mrpapersonic@gmail.com>
parents: 154
diff changeset
14 #include <dirent.h>
140
1e696863b54c dep/animia: remove superfluous includes
Paper <mrpapersonic@gmail.com>
parents: 139
diff changeset
15 #include <fcntl.h>
1e696863b54c dep/animia: remove superfluous includes
Paper <mrpapersonic@gmail.com>
parents: 139
diff changeset
16 #include <sys/stat.h>
1e696863b54c dep/animia: remove superfluous includes
Paper <mrpapersonic@gmail.com>
parents: 139
diff changeset
17 #include <unistd.h>
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
18
181
d26cd2c00270 dep/animia/fd/proc: use constexpr std::string_view for proc location
Paper <mrpapersonic@gmail.com>
parents: 180
diff changeset
19 static constexpr std::string_view PROC_LOCATION = "/proc";
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
20
166
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
21 namespace animia::internal::proc {
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
22
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
23 /* this uses dirent instead of std::filesystem; it would make a bit
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
24 more sense to use the latter, but this is platform dependent already :) */
163
44c5e6dd9488 dep/animia/osx: move GetProcessName to util/osx so we can use it in quartz
Paper <mrpapersonic@gmail.com>
parents: 156
diff changeset
25 static std::vector<std::string> GetAllFilesInDir(const std::string& _dir) {
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
26 std::vector<std::string> ret;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
27
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
28 DIR* dir = opendir(_dir.c_str());
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
29 if (!dir)
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
30 return ret;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
31
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
32 struct dirent* dp;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
33 while ((dp = readdir(dir)) != NULL) {
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
34 if (!(!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")))
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
35 ret.push_back(_dir + "/" + dp->d_name);
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
36 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
37
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
38 closedir(dir);
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
39 return ret;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
40 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
41
163
44c5e6dd9488 dep/animia/osx: move GetProcessName to util/osx so we can use it in quartz
Paper <mrpapersonic@gmail.com>
parents: 156
diff changeset
42 static std::string Basename(const std::string& path) {
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
43 return path.substr(path.find_last_of("/") + 1, path.length());
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
44 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
45
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
46 static bool IsRegularFile(std::string link) {
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
47 struct stat sb;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
48 if (stat(link.c_str(), &sb) == -1)
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
49 return false;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
50 return S_ISREG(sb.st_mode);
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
51 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
52
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
53 static bool AreFlagsOk(pid_t pid, int fd) {
181
d26cd2c00270 dep/animia/fd/proc: use constexpr std::string_view for proc location
Paper <mrpapersonic@gmail.com>
parents: 180
diff changeset
54 const std::string path = std::string(PROC_LOCATION) + "/" + std::to_string(pid) + "/fdinfo/" + std::to_string(fd);
164
99fdf5a90b0f fd/linux: avoid reading buffers multiple times
Paper <mrpapersonic@gmail.com>
parents: 163
diff changeset
55
99fdf5a90b0f fd/linux: avoid reading buffers multiple times
Paper <mrpapersonic@gmail.com>
parents: 163
diff changeset
56 std::ifstream file(path.c_str());
99fdf5a90b0f fd/linux: avoid reading buffers multiple times
Paper <mrpapersonic@gmail.com>
parents: 163
diff changeset
57 if (!file)
99fdf5a90b0f fd/linux: avoid reading buffers multiple times
Paper <mrpapersonic@gmail.com>
parents: 163
diff changeset
58 return false;
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
59
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
60 int flags = 0;
164
99fdf5a90b0f fd/linux: avoid reading buffers multiple times
Paper <mrpapersonic@gmail.com>
parents: 163
diff changeset
61 for (std::string line; std::getline(file, line); )
99fdf5a90b0f fd/linux: avoid reading buffers multiple times
Paper <mrpapersonic@gmail.com>
parents: 163
diff changeset
62 if (line.find("flags:", 0) == 0)
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
63 flags = std::stoi(line.substr(line.find_last_not_of("0123456789") + 1));
164
99fdf5a90b0f fd/linux: avoid reading buffers multiple times
Paper <mrpapersonic@gmail.com>
parents: 163
diff changeset
64
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
65 if (flags & O_WRONLY || flags & O_RDWR)
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
66 return false;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
67 return true;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
68 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
69
166
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
70 static bool GetFilenameFromFd(std::string link, std::string& out) {
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
71 /* gets around stupid linux limitation where /proc doesn't
180
5be17d636aee deps/animia/fd/proc: patch for new filename getter
Paper <mrpapersonic@gmail.com>
parents: 166
diff changeset
72 * give actual size readings of the string
5be17d636aee deps/animia/fd/proc: patch for new filename getter
Paper <mrpapersonic@gmail.com>
parents: 166
diff changeset
73 */
166
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
74 constexpr size_t OUT_MAX = (1 << 15); // 32KiB
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
75 out.resize(1024);
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
76
166
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
77 for (ssize_t exe_used = 0;
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
78 out.length() < OUT_MAX && exe_used >= (ssize_t)(out.length() - 1);
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
79 out.resize(out.length() * 2)) {
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
80 exe_used = readlink(link.c_str(), &out.front(), out.length());
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
81 if (exe_used == (ssize_t)-1 || exe_used < (ssize_t)1)
180
5be17d636aee deps/animia/fd/proc: patch for new filename getter
Paper <mrpapersonic@gmail.com>
parents: 166
diff changeset
82 return false; // we got a bad result, i think
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
83 }
180
5be17d636aee deps/animia/fd/proc: patch for new filename getter
Paper <mrpapersonic@gmail.com>
parents: 166
diff changeset
84
5be17d636aee deps/animia/fd/proc: patch for new filename getter
Paper <mrpapersonic@gmail.com>
parents: 166
diff changeset
85 return true;
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
86 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
87
154
d43d68408d3c dep/animia: fix XnuFdTools
Paper <mrpapersonic@gmail.com>
parents: 152
diff changeset
88 static std::string GetProcessName(pid_t pid) {
166
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
89 std::string result;
152
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
90
181
d26cd2c00270 dep/animia/fd/proc: use constexpr std::string_view for proc location
Paper <mrpapersonic@gmail.com>
parents: 180
diff changeset
91 const std::string path = std::string(PROC_LOCATION) + "/" + std::to_string(pid) + "/comm";
154
d43d68408d3c dep/animia: fix XnuFdTools
Paper <mrpapersonic@gmail.com>
parents: 152
diff changeset
92
152
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
93 if (!util::ReadFile(path, result))
154
d43d68408d3c dep/animia: fix XnuFdTools
Paper <mrpapersonic@gmail.com>
parents: 152
diff changeset
94 return "";
152
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
95
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
96 result.erase(std::remove(result.begin(), result.end(), '\n'), result.end());
154
d43d68408d3c dep/animia: fix XnuFdTools
Paper <mrpapersonic@gmail.com>
parents: 152
diff changeset
97
d43d68408d3c dep/animia: fix XnuFdTools
Paper <mrpapersonic@gmail.com>
parents: 152
diff changeset
98 return result;
152
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
99 }
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
100
166
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
101 bool ProcFdTools::EnumerateOpenProcesses(process_proc_t process_proc) {
144
e6668085e24d dep/animia: fix many bugs in the linux code
Paper <mrpapersonic@gmail.com>
parents: 143
diff changeset
102 bool success = false;
181
d26cd2c00270 dep/animia/fd/proc: use constexpr std::string_view for proc location
Paper <mrpapersonic@gmail.com>
parents: 180
diff changeset
103 for (const auto& dir : GetAllFilesInDir(std::string(PROC_LOCATION))) {
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
104 pid_t pid;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
105 try {
144
e6668085e24d dep/animia: fix many bugs in the linux code
Paper <mrpapersonic@gmail.com>
parents: 143
diff changeset
106 pid = std::stoul(Basename(dir));
e6668085e24d dep/animia: fix many bugs in the linux code
Paper <mrpapersonic@gmail.com>
parents: 143
diff changeset
107 success = true;
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
108 } catch (std::invalid_argument) {
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
109 continue;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
110 }
152
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
111 if (!process_proc({pid, GetProcessName(pid)}))
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
112 return false;
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
113 }
144
e6668085e24d dep/animia: fix many bugs in the linux code
Paper <mrpapersonic@gmail.com>
parents: 143
diff changeset
114 return success;
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
115 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
116
166
54c5d80a737e dep/animia: add libutil method
paper@DavesDouble.local
parents: 164
diff changeset
117 bool ProcFdTools::EnumerateOpenFiles(const std::set<pid_t>& pids, open_file_proc_t open_file_proc) {
152
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
118 if (!open_file_proc)
144
e6668085e24d dep/animia: fix many bugs in the linux code
Paper <mrpapersonic@gmail.com>
parents: 143
diff changeset
119 return false;
e6668085e24d dep/animia: fix many bugs in the linux code
Paper <mrpapersonic@gmail.com>
parents: 143
diff changeset
120
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
121 for (const auto& pid : pids) {
181
d26cd2c00270 dep/animia/fd/proc: use constexpr std::string_view for proc location
Paper <mrpapersonic@gmail.com>
parents: 180
diff changeset
122 const std::string path = std::string(PROC_LOCATION) + "/" + std::to_string(pid) + "/fd";
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
123
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
124 for (const auto& dir : GetAllFilesInDir(path)) {
144
e6668085e24d dep/animia: fix many bugs in the linux code
Paper <mrpapersonic@gmail.com>
parents: 143
diff changeset
125 if (!AreFlagsOk(pid, std::stoi(Basename(dir))))
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
126 continue;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
127
180
5be17d636aee deps/animia/fd/proc: patch for new filename getter
Paper <mrpapersonic@gmail.com>
parents: 166
diff changeset
128 std::string name;
5be17d636aee deps/animia/fd/proc: patch for new filename getter
Paper <mrpapersonic@gmail.com>
parents: 166
diff changeset
129 if (!GetFilenameFromFd(dir, name))
5be17d636aee deps/animia/fd/proc: patch for new filename getter
Paper <mrpapersonic@gmail.com>
parents: 166
diff changeset
130 continue;
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
131
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
132 if (!IsRegularFile(name))
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
133 continue;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
134
152
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
135 if (!open_file_proc({pid, name}))
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
136 return false;
138
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
137 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
138 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
139 return true;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
140 }
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
141
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
142 } // namespace animia::internal::linux