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#include <iostream>
#include <unistd.h>
#include <cstdlib>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <cstring>
#include <dirent.h>
#include <sys/ioctl.h>
int w, h;
struct meminfo{
int total = 0;
int free = 0;
int available = 0;
void loadmem();
int used(){return total-free;}
int taken(){return total-available;}
int percent(){if (total == 0){return 0;} else return 100*taken()/total;}
int bufpercent(){if (total == 0){return 0;} else return 100*used()/total;}
};
void meminfo::loadmem() {
FILE* file = fopen("/proc/meminfo", "r");
int line = 0, n = 0;
char c[84];
fread(&c, 1, 84, file);
fclose(file);
for (int i = 0; i < 84; i++) {
if (c[i] > 47 && c[i] < 58) ((n *= 10) += c[i] - 48);
else if (c[i] == 10) {
n /= 1000;
switch (line) {
case 0: total = n;
case 1: free = n;
case 2: available = n;
}
n = 0;
line++;
}
}
}
struct cpuinfo{
int temp = 0;
int loadavg = 0;
void loadcpu();
int getloadavg();
int gettemp();
};
int cpuinfo::getloadavg() {
long double a[4], b[4];
FILE *fp;
char dump[50];
fp = fopen("/proc/stat","r");
fscanf(fp,"%*s %Lf %Lf %Lf %Lf",&a[0],&a[1],&a[2],&a[3]);
fclose(fp);
usleep(1000000);
fp = fopen("/proc/stat","r");
fscanf(fp,"%*s %Lf %Lf %Lf %Lf",&b[0],&b[1],&b[2],&b[3]);
fclose(fp);
return 100 * ((b[0]+b[1]+b[2]) - (a[0]+a[1]+a[2])) / ((b[0]+b[1]+b[2]+b[3]) - (a[0]+a[1]+a[2]+a[3]));
}
int cpuinfo::gettemp() {
struct dirent *item;
FILE* file;
char buf[12];
DIR *dir = opendir("/sys/class/thermal");
while ((item = readdir(dir))) {
if (strncmp(item->d_name, "thermal_zone", 12) != 0) continue;
char path[256] = "/sys/class/thermal/";
strcat(path, item->d_name);
strcat(path, "/type");
file = fopen(path, "r");
fread(&buf, 1, 12, file);
fclose(file);
if (strncmp(buf, "x86_pkg_temp", 12) == 0) {
path[strlen(path) - 4] = '\0';
strcat(path, "temp");
file = fopen(path, "r");
fread(&buf, 1, 2, file);
fclose(file);
return ((int)buf[0]-48)*10+((int)buf[1]-48);
}
}
return 0;
}
void cpuinfo::loadcpu(){
loadavg = getloadavg();
temp = gettemp();
}
void termsize(int& w, int& h){
struct winsize size;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &size);
w = size.ws_col;
h = size.ws_row;
}
void signal_callback_handler(int signum) {
std::cout << "\033[?1049l\033[?25h" << std::endl;
exit(signum);
}
std::string padint(int n, int len){
std::string s = std::to_string(n);
for (; s.length() < len; s = " " + s);
return s;
}
int graphscale(int n) {return h-1-(n*(h-6)/100);}
void plot(int x, int y, int color){
if (color > 7 || color < 1) color = 7;
if (x%2 == 0) color+=8;
for (;y<h;std::cout << "\033[" << y++ << ";" << x << "H\033[48;5;" << color << "m \033[0m");
}
int main(){
meminfo mem;
cpuinfo cpu;
int cpugraph[150] = {0};
int ramgraph[150] = {0};
int i;
std::string bg;
std::string graphnum;
std::cout << "\033[?25l\033[?1049h\033[2J" << std::endl;
signal(SIGINT, signal_callback_handler);
for (;;) {
termsize(w, h);
mem.loadmem();
cpu.loadcpu(); // contains usleep(1000000)
for (i = 150; i > 0; i--) {
cpugraph[i] = cpugraph[i-1];
ramgraph[i] = ramgraph[i-1];
}
cpugraph[0] = cpu.loadavg;
ramgraph[0] = mem.percent();
if (w < 60 || h < 10) {
std::cout << "\033[2J\033[1;1HWindow too small\033[2;1HMinimum size: 60x10" << std::endl;
continue;
}
if (w > 300) w = 300;
if (h > 106) h = 106;
std::cout
<< "\033[2J"
<< "\033[2;3HLoad: " << padint(cpu.loadavg, 3) << "% Memory:\033[3;3HTemp: " << padint(cpu.temp, 3) << "C"
<< "\033[2;22HUsed by apps: " << padint(mem.taken(), 5) << " (" << mem.percent() << "%)\033[2;48HUsed: " << padint(mem.used(), 5)
<< "\033[3;22HCan be freed: " << padint(mem.available, 5) << "\033[3;48HFree: " << padint(mem.free, 5);
for (bg = ""; bg.length() < w-4; bg += " ");
for (i = 5; i < h; i++) {
std::cout << "\033[" << i << ";3H\033[48;5;235m" << bg << "\033[0m";
}
for (i = 3; i < w/2-2; i++) {
plot(i, graphscale(cpugraph[w/2+1-i-3]), 4);
plot(i+w/2+2, graphscale(ramgraph[w/2+1-i-3]), 6);
}
for (i = 5; i < h; i++) {
graphnum = padint(100-(i-5)*100/(h-6), 3);
std::cout << "\033[" << i << ";" << w/2-2 << "H -" << graphnum << "- ";
}
std::cout << std::endl;
}
return 0;
}