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
|
// SPDX-License-Identifier: GPL-3.0-or-later
#include "../libnetdata.h"
pid_t pid_max = 4194304;
pid_t os_get_system_pid_max(void) {
static bool read = false;
if(read) return pid_max;
read = true;
#if defined(OS_MACOS)
int mib[2];
int maxproc;
size_t len = sizeof(maxproc);
mib[0] = CTL_KERN;
mib[1] = KERN_MAXPROC;
if (sysctl(mib, 2, &maxproc, &len, NULL, 0) == -1) {
pid_max = 99999; // Fallback value
nd_log(NDLS_DAEMON, NDLP_ERR, "Cannot find system max pid. Assuming %d.", pid_max);
}
else pid_max = (pid_t)maxproc;
return pid_max;
#elif defined(OS_FREEBSD)
int32_t tmp_pid_max;
if (unlikely(GETSYSCTL_BY_NAME("kern.pid_max", tmp_pid_max))) {
pid_max = 99999;
nd_log(NDLS_DAEMON, NDLP_ERR, "Cannot get system max pid. Assuming %d.", pid_max);
}
else
pid_max = tmp_pid_max;
return pid_max;
#elif defined(OS_LINUX)
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/proc/sys/kernel/pid_max", netdata_configured_host_prefix?netdata_configured_host_prefix:"");
unsigned long long max = 0;
if(read_single_number_file(filename, &max) != 0) {
nd_log(NDLS_DAEMON, NDLP_ERR, "Cannot open file '%s'. Assuming system supports %d pids.", filename, pid_max);
return pid_max;
}
if(!max) {
nd_log(NDLS_DAEMON, NDLP_ERR, "Cannot parse file '%s'. Assuming system supports %d pids.", filename, pid_max);
return pid_max;
}
pid_max = (pid_t) max;
return pid_max;
#elif defined(OS_WINDOWS)
pid_max = (pid_t)0x7FFFFFFF;
return pid_max;
#else
// return the default
return pid_max;
#endif
}
|
