linux下获取目录信息的函数

// 通用Makefile
// 函数编写：王晨曦
// linux下获取目录信息的函数

/* 获取目录信息函数 */
char ** dirGetInfo(const char *pathname)
{
    char **filenames;
    char no[20];
    DIR *dir;
    struct dirent *ent;
    int n = 0;

    filenames = (char **)malloc(sizeof(char*));
    filenames[0] = NULL;

    dir = opendir(pathname);
    if (!dir)
    {
        return filenames;
    }

    while ((ent = readdir(dir)))
    {
        filenames = (char**)realloc(filenames, sizeof(char*)*(n + 1));
        filenames[n] = (char*)malloc(strlen(ent->d_name) * sizeof(char) + 20 * sizeof(char));
        sprintf(no, "   [%2d] ", n - 2);
        strcpy(filenames[n], no);
        strcat(filenames[n], ent->d_name);
        n++;
    }  // end while

    closedir(dir);

    free(filenames[0]);
    filenames[0] = strdup("                     ");
    free(filenames[1]);
    filenames[1] = strdup("--------------------------------");
    filenames = (char **)realloc(filenames, sizeof(char*)*(n + 1));
    filenames[n++] = strdup("   [ q] 退出");
    filenames = (char **)realloc(filenames, sizeof(char*)*(n + 1));
    filenames[n++] = strdup("--------------------------------");
    filenames = (char **)realloc(filenames, sizeof(char*)*(n + 1));
    filenames[n] = NULL;

    return filenames;
}