ram.c

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