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comparison dep/animia/src/bsd.cpp @ 56:6ff7aabeb9d7

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deps: add animia for open files detection
author Paper <mrpapersonic@gmail.com>
date Thu, 28 Sep 2023 12:35:21 -0400
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children 4c6dd5999b39
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54:466ac9870df9 56:6ff7aabeb9d7
1 /**
2 * bsd.cpp
3 * - provides support for most* versions of BSD
4 * - this *should* also work for OS X
5 * more technical details: this is essentially a wrapper
6 * around the very C-like BSD system functions that are...
7 * kind of unnatural to use in modern C++.
8 **/
9 #include <vector>
10 #include <string>
11 #include <unordered_map>
12 #include <sys/types.h>
13 #include <sys/sysctl.h>
14 #include <sys/user.h>
15 #include <fcntl.h>
16 #include <iostream>
17 #ifdef __FreeBSD__
18 #include <libutil.h>
19 #elif defined(__APPLE__)
20 #include <libproc.h>
21 #endif
22
23 namespace Animia::Unix {
24
25 /* this is a cleaned up version of a function from... Apple?
26 ...anyway, what it essentially does is gets the size and stuff from
27 sysctl() and reserves the space in a vector to store the PIDs */
28 std::vector<int> get_all_pids() {
29 std::vector<int> ret;
30 struct kinfo_proc* result = NULL;
31 size_t length = 0;
32 static const int name[] = { CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0 };
33
34 /* get appropriate length from sysctl() */
35 sysctl((int*)name, (sizeof(name) / sizeof(*name)) - 1, NULL, &length, NULL, 0);
36
37 result = (struct kinfo_proc*)malloc(length);
38 if (result == NULL)
39 return std::vector<int>();
40
41 /* actually get our results */
42 if (sysctl((int*)name, (sizeof(name) / sizeof(*name)) - 1, result, &length, NULL, 0) == ENOMEM) {
43 assert(result != NULL);
44 free(result);
45 throw std::bad_alloc();
46 }
47
48 /* add pids to our vector */
49 ret.reserve(length/sizeof(*result));
50 for (int i = 0; i < length/sizeof(*result); i++)
51 ret.push_back(result[i].kp_proc.p_pid);
52
53 return ret;
54 }
55
56 std::string get_process_name(int pid) {
57 std::string ret;
58 #ifdef __FreeBSD__
59 struct kinfo_proc* proc = kinfo_getproc(pid);
60 if (!proc) {
61 return "";
62 ret = proc->ki_comm;
63 free(proc);
64 #elif defined(__APPLE__)
65 struct proc_bsdinfo proc;
66
67 int st = proc_pidinfo(pid, PROC_PIDTBSDINFO, 0, &proc, PROC_PIDTBSDINFO_SIZE);
68 if (st != PROC_PIDTBSDINFO_SIZE)
69 return "";
70 return proc.pbi_comm;
71 #endif
72 return ret;
73 }
74
75 std::vector<std::string> get_open_files(int pid) {
76 // initialize buffer
77 std::vector<std::string> ret;
78 int bufsz = proc_pidinfo(pid, PROC_PIDLISTFDS, 0, NULL, 0);
79 struct proc_fdinfo *info = (struct proc_fdinfo *)malloc(bufsz);
80 proc_pidinfo(pid, PROC_PIDLISTFDS, 0, info, bufsz);
81
82 // iterate over stuff
83 for (int i = 0; i < bufsz/sizeof(info[0]); i++) {
84 if (info[i].proc_fdtype == PROX_FDTYPE_VNODE) {
85 struct vnode_fdinfowithpath vnodeInfo;
86 proc_pidfdinfo(pid, info[i].proc_fd, PROC_PIDFDVNODEPATHINFO, &vnodeInfo, PROC_PIDFDVNODEPATHINFO_SIZE);
87 ret.push_back(vnodeInfo.pvip.vip_path);
88 }
89 }
90 return ret;
91 }
92
93 std::unordered_map<int, std::vector<std::string>> get_all_open_files() {
94 std::unordered_map<int, std::vector<std::string>> map;
95 std::vector<int> pids = get_all_pids();
96 for (int i: pids) {
97 map[i] = get_open_files(i);
98 }
99 return map;
100 }
101
102 }