Directory

Programma per la lettura directory

#include <stdio.h>
#include <dirent.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <pwd.h>
#include <grp.h>
#include <time.h>
 
void printFileInfo(const char* dirName, const char* fileName) {
    struct stat fileInfo;
    char filePath[1024];
    snprintf(filePath, sizeof(filePath), "%s/%s", dirName, fileName);
 
    if (stat(filePath, &fileInfo) < 0) {
        perror("Errore nel recupero delle informazioni del file");
        return;
    }
 
    printf("%llu ", fileInfo.st_size); // Dimensione del file
 
    // Permessi del file
    printf((S_ISDIR(fileInfo.st_mode)) ? "d" : "-");
    printf((fileInfo.st_mode & S_IRUSR) ? "r" : "-");
    printf((fileInfo.st_mode & S_IWUSR) ? "w" : "-");
    printf((fileInfo.st_mode & S_IXUSR) ? "x" : "-");
    printf((fileInfo.st_mode & S_IRGRP) ? "r" : "-");
    printf((fileInfo.st_mode & S_IWGRP) ? "w" : "-");
    printf((fileInfo.st_mode & S_IXGRP) ? "x" : "-");
    printf((fileInfo.st_mode & S_IROTH) ? "r" : "-");
    printf((fileInfo.st_mode & S_IWOTH) ? "w" : "-");
    printf((fileInfo.st_mode & S_IXOTH) ? "x" : "-");
    
    // Proprietario e gruppo
    struct passwd *pw = getpwuid(fileInfo.st_uid);
    struct group  *gr = getgrgid(fileInfo.st_gid);
    printf(" %s %s", pw->pw_name, gr->gr_name);
 
    // Data di ultima modifica
    char dateStr[128];
    strftime(dateStr, sizeof(dateStr), "%b %d %H:%M", localtime(&fileInfo.st_mtime));
    printf(" %s", dateStr);
 
    // Nome del file
    printf(" %s\n", fileName);
}
 
 
int main(int argc, char *argv[]) {
    DIR *dirp;
    struct dirent *dirent;
 
    if (argc != 2) {
        fprintf(stderr, "Errore: manca inputfile. Uso: %s <directory>\n", argv[0]);
        return 1;
    }
 
    dirp = opendir(argv[1]);
    if (dirp == NULL) {
        perror("Errore nell'apertura della directory");
        return 1;
    }
 
    while ((dirent = readdir(dirp)) != NULL) {
        printFileInfo(argv[1], dirent->d_name);
    }
 
    closedir(dirp);
    return 0;
}