linux system state

sys.c

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

void get_cpu_load() {
    FILE* fp = popen("uptime | awk '{print $(NF-2)}'", "r");
    if (fp == NULL) {
        printf("Failed to get CPU load.\n");
        return;
    }

    char load[50];
    fgets(load, sizeof(load), fp);
    pclose(fp);

    printf("Current CPU load: %s\n", load);
}

void get_cpu_temperature() {
    FILE* fp = popen("echo $[$(cat /sys/class/thermal/thermal_zone0/temp)/1000]°", "r");
    if (fp == NULL) {
        printf("Failed to get CPU temperature.\n");
        return;
    }

    char temperature[50];
    fgets(temperature, sizeof(temperature), fp);
    pclose(fp);

    printf("Current CPU temperature: %s\n", temperature);
}

void get_disk_usage() {
    FILE* fp = popen("df -h | awk '/\\/$/ {print $5}'", "r");
    if (fp == NULL) {
        printf("Failed to get disk usage.\n");
        return;
    }

    char usage[50];
    fgets(usage, sizeof(usage), fp);
    pclose(fp);

    printf("Disk usage in /: %s\n", usage);
}

void get_all_processes() {
    FILE* fp = popen("ps -A -o pid,comm", "r");
    if (fp == NULL) {
        printf("Failed to get all processes.\n");
        return;
    }

    char buffer[256];
    fgets(buffer, sizeof(buffer), fp); // Skip the header line

    while (fgets(buffer, sizeof(buffer), fp) != NULL) {
        int pid;
        char process_name[256];
        sscanf(buffer, "%d %[^\n]", &pid, process_name);
        printf("PID: %d, Name: %s\n", pid, process_name);
    }

    pclose(fp);
}


int get_network_usage() {
    char pingCmd[256];
    char buf[256];
    FILE *fp;

    snprintf(pingCmd, sizeof(pingCmd), "ping -c 4 www.baidu.com &");

    if ((fp = popen(pingCmd, "r")) == NULL) {
        perror("popen");
        return -1;
    }

    while (fgets(buf, sizeof(buf), fp) != NULL) {
        printf("%s", buf);
    }

    if (pclose(fp) == -1) {
        perror("pclose");
        return -1;
    }

    return 0;
}


int main(int argc, char* argv[]) {
    get_cpu_load();
    get_cpu_temperature();

    get_disk_usage();
    get_all_processes();
    get_network_usage();
   
    return 0;
}