ram.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <stdio.h>
   3
   4 #include "util.h"
   5
   6 const char *
   7 ram_free(void)
   8 {
   9         long free;
  10
  11         return (pscanf("/proc/meminfo", "MemFree: %ld kB\n", &free) == 1) ?
  12                bprintf("%f", (float)free / 1024 / 1024) : NULL;
  13 }
  14
  15 const char *
  16 ram_perc(void)
  17 {
  18         long total, free, buffers, cached;
  19
  20         return (pscanf("/proc/meminfo",
  21                        "MemTotal: %ld kB\n"
  22                        "MemFree: %ld kB\n"
  23                        "MemAvailable: %ld kB\nBuffers: %ld kB\n"
  24                        "Cached: %ld kB\n",
  25                        &total, &free, &buffers, &buffers, &cached) == 5) ?
  26                bprintf("%d", 100 * ((total - free) - (buffers + cached)) / total) :
  27                NULL;
  28 }
  29
  30 const char *
  31 ram_total(void)
  32 {
  33         long total;
  34
  35         return (pscanf("/proc/meminfo", "MemTotal: %ld kB\n", &total) == 1) ?
  36                bprintf("%f", (float)total / 1024 / 1024) : NULL;
  37 }
  38
  39 const char *
  40 ram_used(void)
  41 {
  42         long total, free, buffers, cached;
  43
  44         return (pscanf("/proc/meminfo",
  45                        "MemTotal: %ld kB\n"
  46                        "MemFree: %ld kB\n"
  47                        "MemAvailable: %ld kB\nBuffers: %ld kB\n"
  48                        "Cached: %ld kB\n",
  49                        &total, &free, &buffers, &buffers, &cached) == 5) ?
  50                bprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024) :
  51                NULL;
  52 }