memory_info.c

#include <stdio.h>
#include <string.h>

#include <ncurses.h> //TUI

typedef struct memory {
    double total_val;
    double avalaible_val; //defaulted to kb
} memory ;

void get_memory_info() {

    FILE *proc_mem = fopen("/proc/meminfo", "r");  // read the file

    if (proc_mem == NULL) {
        perror("fopen");
        return;
    }

    memory dict = {-1,-1};
    char line[256];
    int row = 3, col=5;

    while(fgets(line, sizeof line,proc_mem)) {
        int val;
        char label[64];
        char size_unit[16];
        sscanf(line,"%s %d %s",label, &val, size_unit);  // format the data

        mvprintw(row++,col,"%s", line);

        if (strcmp(label, "MemTotal:") == 0) dict.total_val = val;
        else if (strcmp(label, "MemAvailable:") == 0) dict.avalaible_val = val;

        if (dict.avalaible_val != -1 && dict.total_val != -1) break;
    
    }

    fclose(proc_mem);

    // % consumption of memory
    float usedPercentage = (1 - (dict.avalaible_val / dict.total_val)) * 100;

    int strikes = usedPercentage/5;

    // ASCII Art
    mvprintw(row++, col, "Usage: [");
    attron(COLOR_PAIR(1));
    for(int i=0; i<strikes; i++) addch('#'); 
    attroff(COLOR_PAIR(1));
    for(int i=strikes; i<20; i++) addch('-');
    printw("] %.2f%%", usedPercentage);
}