#include <stdio.h>
#include "memory.h"

int memory(void) {
    FILE *file = fopen("/proc/meminfo", "r");

    if (!file) {
	fclose(file);
	perror("fopen");
	return 1;
    }

    char line[256];
    long total = 0;
    long available = 0;

    // read per line
    while (fgets(line, sizeof(line), file)) {
	if (sscanf(line, "MemTotal: %ld kB", &total) == 1) continue;
	if (sscanf(line, "MemAvailable: %ld kB", &available) == 1) continue;
    }

    fclose(file);

    printf("Memory: %.2f GB / %.2f GB\n", (total - available) / (1024.0 * 1024.0), total / (1024.0 * 1024.0));

    return 0;
}