slstatus

ram.c (4281B)

---

 /* 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