components/ram.c
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/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include "../util.h"
#if defined(__linux__)
#include <stdint.h>
const char *
ram_free(void)
{
uintmax_t free;
if (pscanf("/proc/meminfo",
"MemTotal: %ju kB\n"
"MemFree: %ju kB\n"
"MemAvailable: %ju kB\n",
&free, &free, &free) != 3) {
return NULL;
}
return fmt_human(free * 1024, 1024);
}
const char *
ram_perc(void)
{
uintmax_t total, free, buffers, cached;
if (pscanf("/proc/meminfo",
"MemTotal: %ju kB\n"
"MemFree: %ju kB\n"
"MemAvailable: %ju kB\n"
"Buffers: %ju kB\n"
"Cached: %ju kB\n",
&total, &free, &buffers, &buffers, &cached) != 5) {
return NULL;
}
if (total == 0) {
return NULL;
}
return bprintf("%d", 100 * ((total - free) - (buffers + cached))
/ total);
}
const char *
ram_total(void)
{
uintmax_t total;
if (pscanf("/proc/meminfo", "MemTotal: %ju kB\n", &total)
!= 1) {
return NULL;
}
return fmt_human(total * 1024, 1024);
}
const char *
ram_used(void)
{
uintmax_t total, free, buffers, cached;
if (pscanf("/proc/meminfo",
"MemTotal: %ju kB\n"
"MemFree: %ju kB\n"
"MemAvailable: %ju kB\n"
"Buffers: %ju kB\n"
"Cached: %ju kB\n",
&total, &free, &buffers, &buffers, &cached) != 5) {
return NULL;
}
return fmt_human((total - free - buffers - cached) * 1024,
1024);
}
#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_t)(size << (pageshift - LOG1024))
inline int
load_uvmexp(struct uvmexp *uvmexp)
{
int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
size_t size;
size = sizeof(*uvmexp);
if (sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0) {
return 1;
}
return 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(pagetok(free_pages, uvmexp.pageshift) *
1024, 1024);
}
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(pagetok(uvmexp.npages,
uvmexp.pageshift) * 1024,
1024);
}
return NULL;
}
const char *
ram_used(void)
{
struct uvmexp uvmexp;
if (load_uvmexp(&uvmexp)) {
return fmt_human(pagetok(uvmexp.active,
uvmexp.pageshift) * 1024,
1024);
}
return NULL;
}
#elif defined(__FreeBSD__)
#include <sys/sysctl.h>
#include <sys/vmmeter.h>
#include <unistd.h>
#include <vm/vm_param.h>
const char *
ram_free(void) {
struct vmtotal vm_stats;
int mib[] = {CTL_VM, VM_TOTAL};
size_t len;
len = sizeof(struct vmtotal);
if (sysctl(mib, 2, &vm_stats, &len, NULL, 0) == -1
|| !len)
return NULL;
return fmt_human(vm_stats.t_free * getpagesize(), 1024);
}
const char *
ram_total(void) {
long npages;
size_t len;
len = sizeof(npages);
if (sysctlbyname("vm.stats.vm.v_page_count", &npages, &len, NULL, 0) == -1
|| !len)
return NULL;
return fmt_human(npages * getpagesize(), 1024);
}
const char *
ram_perc(void) {
long npages;
long active;
size_t len;
len = sizeof(npages);
if (sysctlbyname("vm.stats.vm.v_page_count", &npages, &len, NULL, 0) == -1
|| !len)
return NULL;
if (sysctlbyname("vm.stats.vm.v_active_count", &active, &len, NULL, 0) == -1
|| !len)
return NULL;
return bprintf("%d", active * 100 / npages);
}
const char *
ram_used(void) {
long active;
size_t len;
len = sizeof(active);
if (sysctlbyname("vm.stats.vm.v_active_count", &active, &len, NULL, 0) == -1
|| !len)
return NULL;
return fmt_human(active * getpagesize(), 1024);
}
#endif