ram.c (4408B) download
1/* See LICENSE file for copyright and license details. */
2#include <stdio.h>
3
4#include "../slstatus.h"
5#include "../util.h"
6
7#if defined(__linux__)
8 #include <stdint.h>
9
10 const char *
11 ram_free(const char *unused)
12 {
13 uintmax_t free;
14
15 if (pscanf("/proc/meminfo",
16 "MemTotal: %ju kB\n"
17 "MemFree: %ju kB\n"
18 "MemAvailable: %ju kB\n",
19 &free, &free, &free) != 3)
20 return NULL;
21
22 return fmt_human(free * 1024, 1024);
23 }
24
25 const char *
26 ram_perc(const char *unused)
27 {
28 uintmax_t total, free, buffers, cached;
29 int percent;
30
31 if (pscanf("/proc/meminfo",
32 "MemTotal: %ju kB\n"
33 "MemFree: %ju kB\n"
34 "MemAvailable: %ju kB\n"
35 "Buffers: %ju kB\n"
36 "Cached: %ju kB\n",
37 &total, &free, &buffers, &buffers, &cached) != 5)
38 return NULL;
39
40 if (total == 0)
41 return NULL;
42
43 percent = 100 * ((total - free) - (buffers + cached)) / total;
44 return bprintf("%d", percent);
45 }
46
47 const char *
48 ram_total(const char *unused)
49 {
50 uintmax_t total;
51
52 if (pscanf("/proc/meminfo", "MemTotal: %ju kB\n", &total)
53 != 1)
54 return NULL;
55
56 return fmt_human(total * 1024, 1024);
57 }
58
59 const char *
60 ram_used(const char *unused)
61 {
62 uintmax_t total, free, buffers, cached, used;
63
64 if (pscanf("/proc/meminfo",
65 "MemTotal: %ju kB\n"
66 "MemFree: %ju kB\n"
67 "MemAvailable: %ju kB\n"
68 "Buffers: %ju kB\n"
69 "Cached: %ju kB\n",
70 &total, &free, &buffers, &buffers, &cached) != 5)
71 return NULL;
72
73 used = (total - free - buffers - cached);
74 return fmt_human(used * 1024, 1024);
75 }
76#elif defined(__OpenBSD__)
77 #include <stdlib.h>
78 #include <sys/sysctl.h>
79 #include <sys/types.h>
80 #include <unistd.h>
81
82 #define LOG1024 10
83 #define pagetok(size, pageshift) (size_t)(size << (pageshift - LOG1024))
84
85 inline int
86 load_uvmexp(struct uvmexp *uvmexp)
87 {
88 int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
89 size_t size;
90
91 size = sizeof(*uvmexp);
92
93 if (sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0)
94 return 1;
95
96 return 0;
97 }
98
99 const char *
100 ram_free(const char *unused)
101 {
102 struct uvmexp uvmexp;
103 int free_pages;
104
105 if (!load_uvmexp(&uvmexp))
106 return NULL;
107
108 free_pages = uvmexp.npages - uvmexp.active;
109 return fmt_human(pagetok(free_pages, uvmexp.pageshift) *
110 1024, 1024);
111 }
112
113 const char *
114 ram_perc(const char *unused)
115 {
116 struct uvmexp uvmexp;
117 int percent;
118
119 if (!load_uvmexp(&uvmexp))
120 return NULL;
121
122 percent = uvmexp.active * 100 / uvmexp.npages;
123 return bprintf("%d", percent);
124 }
125
126 const char *
127 ram_total(const char *unused)
128 {
129 struct uvmexp uvmexp;
130
131 if (!load_uvmexp(&uvmexp))
132 return NULL;
133
134 return fmt_human(pagetok(uvmexp.npages,
135 uvmexp.pageshift) * 1024, 1024);
136 }
137
138 const char *
139 ram_used(const char *unused)
140 {
141 struct uvmexp uvmexp;
142
143 if (!load_uvmexp(&uvmexp))
144 return NULL;
145
146 return fmt_human(pagetok(uvmexp.active,
147 uvmexp.pageshift) * 1024, 1024);
148 }
149#elif defined(__FreeBSD__)
150 #include <sys/sysctl.h>
151 #include <sys/vmmeter.h>
152 #include <unistd.h>
153 #include <vm/vm_param.h>
154
155 const char *
156 ram_free(const char *unused) {
157 struct vmtotal vm_stats;
158 int mib[] = {CTL_VM, VM_TOTAL};
159 size_t len;
160
161 len = sizeof(struct vmtotal);
162 if (sysctl(mib, 2, &vm_stats, &len, NULL, 0) < 0
163 || !len)
164 return NULL;
165
166 return fmt_human(vm_stats.t_free * getpagesize(), 1024);
167 }
168
169 const char *
170 ram_total(const char *unused) {
171 unsigned int npages;
172 size_t len;
173
174 len = sizeof(npages);
175 if (sysctlbyname("vm.stats.vm.v_page_count",
176 &npages, &len, NULL, 0) < 0 || !len)
177 return NULL;
178
179 return fmt_human(npages * getpagesize(), 1024);
180 }
181
182 const char *
183 ram_perc(const char *unused) {
184 unsigned int npages;
185 unsigned int active;
186 size_t len;
187
188 len = sizeof(npages);
189 if (sysctlbyname("vm.stats.vm.v_page_count",
190 &npages, &len, NULL, 0) < 0 || !len)
191 return NULL;
192
193 if (sysctlbyname("vm.stats.vm.v_active_count",
194 &active, &len, NULL, 0) < 0 || !len)
195 return NULL;
196
197 return bprintf("%d", active * 100 / npages);
198 }
199
200 const char *
201 ram_used(const char *unused) {
202 unsigned int active;
203 size_t len;
204
205 len = sizeof(active);
206 if (sysctlbyname("vm.stats.vm.v_active_count",
207 &active, &len, NULL, 0) < 0 || !len)
208 return NULL;
209
210 return fmt_human(active * getpagesize(), 1024);
211 }
212#endif