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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>
void panic(const char* msg){
// escape sequences
std::cerr << msg << std::endl;
exit(1);
}
struct meminfo{
int total;
int free;
int available;
void loadmem();
int used(){return total-free;}
int taken(){return total-available;}
};
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;
int loadavg;
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);
}
meminfo mem[256];
cpuinfo cpu[256];
int main(){
std::cout << "\033[?25l\033[?1049h\033[2J" << std::endl;
signal(SIGINT, signal_callback_handler);
for (;;) {
int w, h;
termsize(w, h);
mem[0].loadmem();
cpu[0].loadcpu();
std::cout << "\033[2J" << std::endl;
std::cout << "\033[2;4HLoad: " << cpu[0].loadavg << "%\033[3;4HTemp: " << cpu[0].temp << " C" << std::endl;
std::cout << "\033[2;22HUsed by apps: " << mem[0].taken() << "\033[2;55HIn use: " << mem[0].used() << std::endl;
std::cout << "\033[3;22HCan be freed: " << mem[0].available << "\033[3;50HUnallocated: " << mem[0].free << std::endl;
}
return 0;
}