components/ram.c
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/* See LICENSE file for copyright and license details. */ #include <stdio.h> #if defined (__OpenBSD__) #include <sys/types.h> #include <sys/sysctl.h> #include <stdlib.h> #include <unistd.h> #endif #include "../util.h" #if defined(__linux__) const char * ram_free(void) { long free; return (pscanf("/proc/meminfo", "MemFree: %ld kB\n", &free) == 1) ? bprintf("%f", (float)free / 1024 / 1024) : 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) ? bprintf("%f", (float)total / 1024 / 1024) : 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) ? bprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024) : NULL; } #elif defined(__OpenBSD__) 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; float free; int free_pages; if (load_uvmexp(&uvmexp)) { free_pages = uvmexp.npages - uvmexp.active; free = (double) (free_pages * uvmexp.pagesize) / 1024 / 1024 / 1024; return bprintf("%f", free); } 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; float total; if (load_uvmexp(&uvmexp)) { total = (double) (uvmexp.npages * uvmexp.pagesize) / 1024 / 1024 / 1024; return bprintf("%f", total); } return NULL; } const char * ram_used(void) { struct uvmexp uvmexp; float used; if (load_uvmexp(&uvmexp)) { used = (double) (uvmexp.active * uvmexp.pagesize) / 1024 / 1024 / 1024; return bprintf("%f", used); } return NULL; } #endif