/* Copyright (C) 2025 awy <awy@awy.one>

   stmemory is free software: you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation,
   either version 3 of the License, or (at your option) any later version.

   stmemory is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public
   License along with stmemory. If not, see
   <https://www.gnu.org/licenses/>. */

#include <stdio.h>

#include "../lib/util.h"

int
main(void)
{
  FILE *fp;
  char line[256];
  long total, free;

  if (!(fp = fopen("/proc/meminfo", "r")))
    die("failed to open: /proc/meminfo");

  fgets(line, sizeof(line), fp);
  sscanf(line + 9, "%ld", &total);

  fgets(line, sizeof(line), fp);
  fgets(line, sizeof(line), fp);
  sscanf(line + 13, "%ld", &free);

  printf("%ldMB", (total - free) / 1024 );
  fclose(fp);

  return 0;
}