components/ram.c
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
/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include "../util.h"
#if defined(__linux__)
const char *
ram_free(void)
{
long free;
return (pscanf("/proc/meminfo",
"MemTotal: %ld kB\n"
"MemFree: %ld kB\n"
"MemAvailable: %ld kB\n",
&free, &free, &free) == 3) ?
fmt_human_2(free * 1024, "B") : NULL;
}
const char *
ram_perc(void)
{
long total, free, buffers, cached;
return (pscanf("/proc/meminfo",
"MemTotal: %ld kB\n"
"MemFree: %ld kB\n"
"MemAvailable: %ld kB\nBuffers: %ld kB\n"
"Cached: %ld kB\n",
&total, &free, &buffers, &buffers, &cached) == 5) ?
bprintf("%d%%", 100 * ((total - free) - (buffers + cached)) /
total) :
NULL;
}
const char *
ram_total(void)
{
long total;
return (pscanf("/proc/meminfo", "MemTotal: %ld kB\n", &total) == 1) ?
fmt_human_2(total * 1024, "B") : NULL;
}
const char *
ram_used(void)
{
long total, free, buffers, cached;
return (pscanf("/proc/meminfo",
"MemTotal: %ld kB\n"
"MemFree: %ld kB\n"
"MemAvailable: %ld kB\nBuffers: %ld kB\n"
"Cached: %ld kB\n",
&total, &free, &buffers, &buffers, &cached) == 5) ?
fmt_human_2((total - free - buffers - cached) * 1024, "B") : NULL;
}
#elif defined(__OpenBSD__)
#include <stdlib.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <unistd.h>
#define LOG1024 10
#define pagetok(size, pageshift) ((size) << (pageshift - LOG1024))
inline int
load_uvmexp(struct uvmexp *uvmexp)
{
int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
size_t size;
size = sizeof(*uvmexp);
return sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0 ? 1 : 0;
}
const char *
ram_free(void)
{
struct uvmexp uvmexp;
int free_pages;
if (load_uvmexp(&uvmexp)) {
free_pages = uvmexp.npages - uvmexp.active;
return fmt_human_2(pagetok(free_pages, uvmexp.pageshift) * 1024, "B");
}
return NULL;
}
const char *
ram_perc(void)
{
struct uvmexp uvmexp;
int percent;
if (load_uvmexp(&uvmexp)) {
percent = uvmexp.active * 100 / uvmexp.npages;
return bprintf("%d%%", percent);
}
return NULL;
}
const char *
ram_total(void)
{
struct uvmexp uvmexp;
if (load_uvmexp(&uvmexp)) {
return fmt_human_2(pagetok(uvmexp.npages, uvmexp.pageshift) * 1024, "B");
}
return NULL;
}
const char *
ram_used(void)
{
struct uvmexp uvmexp;
if (load_uvmexp(&uvmexp)) {
return fmt_human_2(pagetok(uvmexp.active, uvmexp.pageshift) * 1024, "B");
}
return NULL;
}
#endif