目录操作符部分函数接口

函数接口

打开目录opendir

        #include <sys/types.h>

        #include <dirent.h>

        DIR *opendir(constchar*name);

                功能：打开目录

                参数:

                        name：目录路径

                返回值：

                        成功：目录流指针

                        失败：-1

关闭目录closedir

        #include <sys/types.h>

        #include <dirent.h>

        int closedir(DIR *dirp);

                功能：关闭目录

                参数：

                        dirp：目录流指针

                返回值：

                        成功0

                        失败-1

readdir读取目录内容

        #include <dirent.h>

        struct dirent * readdir (DIR *dirp);

                功能：读取目录中的内容

                参数：

                        dirp：目录流指针

                返回值：

                        成功：返回结构体指针

                        读到结尾：NULL

                        失败：NULL

struct dirent {

        ino_t d_ino; /* Inode number */         //文件inode号

        off_t d_off; /* Not an offset; see below */

        unsigned short d_reclen; /* Length of this record */

        unsigned char d_type; /* Type of file; not supported

        by all filesystem types */         //文件类型

        char d_name[256]; /* Null-terminated filename */        //文件名

};

修改路径chdir（）

        #include <unistd.h>

        int chdir (const char*path);

                功能：改变当前所处的路径

                参数

                        path：文件路径

                返回值

                        成功：0

                        失败：-1