#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>

#define MAX 1024
#define PID 6
#define PATH_SIZE 128

int main(void)
{
    FILE *fp;
    pid_t pid;
    char pid_str[MAX];
    char path[PATH_SIZE];
    char buf[MAX];

    pid = getpid();
    sprintf(pid_str, "%d", pid);
    strcpy(path, "/proc/self/task/");

    strcat(path, pid_str);
    strcat(path, "/status");

    fp = fopen(path, "r");
    if(fp == NULL)
    {
        perror("fail to pen file");
        exit(1);
    }

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

    return 0;
}