13.c

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#define errorhandle()                                                                                        \
    {                                                                                                        \
        printf("\nNull Pointer Error!\n");                                                                   \
        exit(EXIT_FAILURE);                                                                                  \
    }

int main(void)
{
    DIR *          dir      = NULL;
    struct dirent *direntry = NULL;
    struct stat    filestat;
    int            minimum_file_size;

    printf("Enter the Minimum file Size : ");
    scanf("%d", &minimum_file_size);

    if ((dir = opendir(".")) != NULL) {
        while ((direntry = readdir(dir)) != NULL) {
            if ((strncmp(direntry->d_name, ".", 1) == 0) || (strncmp(direntry->d_name, "..", 2) == 0)) {
                continue;
            }
            lstat(direntry->d_name, &filestat);
            if ((&filestat)->st_size >= minimum_file_size) {
                printf("%-20s%-5lld\n ", direntry->d_name, (long long) filestat.st_size);
            }
        }
    }
    else {
        printf("Error No      : %d\n", errno);
        perror("Error Message ");
        exit(EXIT_FAILURE);
    }
    exit(EXIT_SUCCESS);
}