C/C++获取目录下的文件列表信息
struct dirent
{
long d_ino; /* inode number 索引节点号 */
off_t d_off; /* offset to this dirent 在目录文件中的偏移 */
unsigned short d_reclen; /* length of this d_name 文件名长 */
unsigned char d_type; /* the type of d_name 文件类型 */
char d_name [NAME_MAX+1]; /* file name (null-terminated) 文件名,最长255字符 */
}
struct __dirstream
{
void *__fd; /* `struct hurd_fd' pointer for descriptor. */
char *__data; /* Directory block. */
int __entry_data; /* Entry number `__data' corresponds to. */
char *__ptr; /* Current pointer into the block. */
int __entry_ptr; /* Entry number `__ptr' corresponds to. */
size_t __allocation; /* Space allocated for the block. */
size_t __size; /* Total valid data in the block. */
__libc_lock_define (, __lock) /* Mutex lock for this structure. */
};
typedef struct __dirstream DIR;
2.程序示例
其中程序中win不支持文件类型(d_type),可以根据文件名称后缀来判断文件类型;linux可以直接使用d_type判断是目录还是文件。
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#include <stdio.h>
int main(){
DIR *dir;
struct dirent *ptr;
dir = opendir("."); ///open the dir
while((ptr = readdir(dir)) != NULL) ///read the list of this dir
{
#ifdef _WIN32
printf("d_name: %s\n", ptr->d_name);
#endif
#ifdef __linux
printf("d_type:%d d_name: %s\n", ptr->d_type,ptr->d_name);
#endif
}
closedir(dir);
return 0;
}
程序输出: