gistfile1.c

void processDir(const char* d) {
    DIR* dir = NULL;

    chdir(d);
    dir = opendir("./");

    /*
    char newdir[PATH_MAX];    
    strcpy(newdir, "./");
    strcat(newdir, d);
    dir = opendir(newdir);    

    printf("\npid %d, dir %s\n", getpid(), newdir);
    */

    
    if (dir == NULL) {
        printf("Cannot open directory %s, err: %d\n", d, errno);
        return;
    }

    struct dirent* ent = NULL;
    struct stat st;
    char attrs[11]; // drwxrwxrwx
    while ((ent = readdir(dir)) != NULL) {        
        strcpy(attrs, "----------");
        lstat(ent->d_name, &st);
        fill_attrs(attrs, st.st_mode);

        printf("%s %10ld %s", attrs, st.st_size, ent->d_name);

        if (S_ISLNK(st.st_mode)) {
            char buf[PATH_MAX + 1];
            readlink(ent->d_name, buf, PATH_MAX + 1);

            struct stat st1;
            if (stat(buf, &st1) == -1) {
                printf("                        symlink broken");            
            } else {
                printf("                        symlink");
            }            
        }

        if ((S_ISDIR(st.st_mode) != 0) && 
                (strncmp(ent->d_name, ".", 1) != 0) &&
                (strncmp(ent->d_name, "..", 2) != 0)) {
                if (fork() == 0) {
                    // child
                    processDir(ent->d_name);
                    break;
                } else {
                    //printf("\nDir: %s\n", ent->d_name);
                    int status;
                    wait(&status);
                    //break;
                }

            }

        printf("\n");
    }
}