1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
// This is an open source non-commercial project. Dear PVS-Studio, please check
// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
#include <uv.h> // for HANDLE (win32)
#ifdef WIN32
# include <tlhelp32.h> // for CreateToolhelp32Snapshot
#endif
#if defined(__FreeBSD__) // XXX: OpenBSD, NetBSD ?
# include <string.h>
# include <sys/types.h>
# include <sys/user.h>
#endif
#if defined(__APPLE__) || defined(BSD)
# include <sys/sysctl.h>
# include <pwd.h>
#endif
#include "nvim/log.h"
#include "nvim/os/process.h"
#include "nvim/os/os.h"
#include "nvim/os/os_defs.h"
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "os/process.c.generated.h"
#endif
#ifdef WIN32
static bool os_proc_tree_kill_rec(HANDLE process, int sig)
{
if (process == NULL) {
return false;
}
PROCESSENTRY32 pe;
DWORD pid = GetProcessId(process);
if (pid != 0) {
HANDLE h = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if (h != INVALID_HANDLE_VALUE) {
pe.dwSize = sizeof(PROCESSENTRY32);
if (!Process32First(h, &pe)) {
goto theend;
}
do {
if (pe.th32ParentProcessID == pid) {
HANDLE ph = OpenProcess(PROCESS_ALL_ACCESS, false, pe.th32ProcessID);
if (ph != NULL) {
os_proc_tree_kill_rec(ph, sig);
CloseHandle(ph);
}
}
} while (Process32Next(h, &pe));
CloseHandle(h);
}
}
theend:
return (bool)TerminateProcess(process, (unsigned int)sig);
}
/// Kills process `pid` and its descendants recursively.
bool os_proc_tree_kill(int pid, int sig)
{
assert(sig >= 0);
assert(sig == SIGTERM || sig == SIGKILL);
if (pid > 0) {
ILOG("terminating process tree: %d", pid);
HANDLE h = OpenProcess(PROCESS_ALL_ACCESS, false, (DWORD)pid);
return os_proc_tree_kill_rec(h, sig);
} else {
ELOG("invalid pid: %d", pid);
}
return false;
}
#else
/// Kills process group where `pid` is the process group leader.
bool os_proc_tree_kill(int pid, int sig)
{
assert(sig == SIGTERM || sig == SIGKILL);
int pgid = getpgid(pid);
if (pgid > 0) { // Ignore error. Never kill self (pid=0).
if (pgid == pid) {
ILOG("sending %s to process group: -%d",
sig == SIGTERM ? "SIGTERM" : "SIGKILL", pgid);
int rv = uv_kill(-pgid, sig);
return rv == 0;
} else {
// Should never happen, because process_spawn() did setsid() in the child.
ELOG("pgid %d != pid %d", pgid, pid);
}
} else {
ELOG("getpgid(%d) returned %d", pid, pgid);
}
return false;
}
#endif
/// Gets the process ids of the immediate children of process `ppid`.
///
/// @param ppid Process to inspect.
/// @param[out,allocated] proc_list Child process ids.
/// @param[out] proc_count Number of child processes.
/// @return 0 on success, 1 if process not found, 2 on other error.
int os_proc_children(int ppid, int **proc_list, size_t *proc_count)
{
//
// psutil is a good reference for cross-platform syscall voodoo:
// https://github.com/giampaolo/psutil/tree/master/psutil/arch
//
int *temp = NULL;
*proc_list = NULL;
*proc_count = 0;
#if defined(__APPLE__) || defined(BSD)
# if defined(__APPLE__)
# define KP_PID(o) o.kp_proc.p_pid
# define KP_PPID(o) o.kp_eproc.e_ppid
# elif defined(__FreeBSD__)
# define KP_PID(o) o.ki_pid
# define KP_PPID(o) o.ki_ppid
# else
# define KP_PID(o) o.p_pid
# define KP_PPID(o) o.p_ppid
# endif
static int name[] = { CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0 };
// Get total process count.
size_t len = 0;
int rv = sysctl(name, ARRAY_SIZE(name) - 1, NULL, &len, NULL, 0);
if (rv) {
return 2;
}
// Get ALL processes.
struct kinfo_proc *p_list = xmalloc(len);
rv = sysctl(name, ARRAY_SIZE(name) - 1, p_list, &len, NULL, 0);
if (rv) {
xfree(p_list);
return 2;
}
// Collect processes whose parent matches `ppid`.
bool exists = false;
size_t p_count = len / sizeof(*p_list);
for (size_t i = 0; i < p_count; i++) {
exists = exists || KP_PID(p_list[i]) == ppid;
if (KP_PPID(p_list[i]) == ppid) {
temp = xrealloc(temp, (*proc_count + 1) * sizeof(*temp));
temp[*proc_count] = KP_PID(p_list[i]);
(*proc_count)++;
}
}
xfree(p_list);
if (!exists) {
return 1; // Process not found.
}
#elif defined(__linux__)
char proc_p[256] = { 0 };
// Collect processes whose parent matches `ppid`.
// Rationale: children are defined in thread with same ID of process.
snprintf(proc_p, sizeof(proc_p), "/proc/%d/task/%d/children", ppid, ppid);
FILE *fp = fopen(proc_p, "r");
if (fp == NULL) {
return 1; // Process not found.
}
int match_pid;
while (fscanf(fp, "%d", &match_pid) > 0) {
temp = xrealloc(temp, (*proc_count + 1) * sizeof(*temp));
temp[*proc_count] = match_pid;
(*proc_count)++;
}
fclose(fp);
#endif
*proc_list = temp;
return 0;
}
|
