1. The Stat Family

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

int stat(const char *path, struct stat *buf);
int fstat(int fd, struct stat *buf);
int lstat(const char *path, struct stat *buf);

struct stat{
     dev_t st_dev;
     ino_t  st_ino;
     mode_t st_mode;
     nlink_t st_nlink;
     uid_t st_uid;
     gid_t st_gid;
     dev_t st_rdev;
     off_t st_size;
     blksize_t st_blksize;
     blkcnt_t st_blocks;
     time_t st_atime;
     time_t st_mtime;
     time_t st_ctime;
};

2. Permissions

#include <sys/types.h>
#include <sys/stat.h>

int chmod(const char *path, mode_t mode);
int fchmod(int fd, mode_t mode);

3. Ownership

#include <sys/types.h>
#include <unistd.h>

int chown(const char *path, uid_t owner, gid_t group);
int lchown(const char *path, uid_t owner, gid_t group);
int fchown(int fd, uid_t owner, gid_t group);

4. Extended attribute namespaces
system
security
trusted
user

5. Retrieving an extended attribute
#include <sys/types.h>
#inlcude <attr/xattr.h>

ssize_t getxattr(const char *path, const char *key, void *value, size_t size);
ssize_t lgetxattr(const char *path, const char *key, void *value, size_t size);
ssize_t fgetxattr(int fd, const char *key, void *value, size_t size);

6. Setting an extended attribute
#include <sys/types.h>
#include <attr/xattr.h>

int setxattr(const char *path, const char *key, const void *value, size_t size, int flags);
int lsetxattr(const char *path, const char *key, const void *value, size_t size, int flags);
int fsetxattr(int fd, const char *key, const void *value, size_t size, int flags);

7. Listing the extended attributes on a file
#include <sys/types.h>
#include <attr/xattr.h>

ssize_t listxattr(const char *path, char *list, size_t size);
ssize_t llistxattr(const char *path, char *list, size_t size);
ssize_t flistxattr(int fd, char *list, size_t size);

8. Removing an extended attribute
#include <sys/types.h>
#include <attr/xattr.h>

int removexattr(const char *path, const char *key);
int lremovexattr(const char *path, chost char *key);
int fremovexattr(int fd, const char *key);

9. Obtaining the current working directory
#include <unistd.h>

char *getcwd(char *buf, size_t size);

#define _GNU_SOURCE
#include <unistd.h>

char *get_current_dir_name(void);

#define _XOPEN_SOURCE_EXTENDED     /* or _BSD_SOURCE */
#include <unistd.h>

char *getwd(char *buf);

10. Changing the current working directory
#include <unistd.h>

int chdir(const char *path);
int fchdir(int fd);

11. Creating Directories
#include <sys/stat.h>
#include <sys/types.h>

int mkdir(const char *path, mode_t mode);

12. Removing Directories
#include <unistd.h>

int rmdir (const char *path);

13. Reading a Directory's Contents
#include <sys/types.h>
#include <dirent.h>

DIR *opendir(cosnt char *name);

To obtain the file descriptor behind a given directory stream:
#define _BSD_SOURCE /* or _SVID_SOURCE */
#include <sys/types.h>
#include <dirent.h>

int dirfd(DIR *dir);

14. Reading from a directory stream
#include <sys/types.h>
#include <dirent.h>

struct dirent *readdir(DIR *dir);

struct dirent{
     ino_t d_ino;
     off_t d_off;
     unsigned short d_reclen;
     unsigned char d_type;
     char d_name[256];
};

15. Closing the directory stream
#include <sys/types.h>
#include <dirent.h>

int closedir(DIR *dir);

16. System call for reading directory contents
#include <unistd.h>
#include <sys/types.h>
#include <linux/dirent.h>
#include <linux/unistd.h>
#incllude <errno.h>

/*
 * Not defined for user space: need to 
 * use the _syscall3() macro to access
 */

int readdir(unsigned int fd, struct dirent *dirp, unsigned int count);

int getdents(unsigned int fd, struct dirent *dirp, unsigned int count);

You do not want to use these system calls! They are obtuse and not portable.

17. Hard Links
#include <unistd.h>

int link(const char *oldpath, const char *new path);

18. Symbolic Links
#include <unistd.h>

int symlink(const char *oldpath, const char *newpath);

19. Unlinking
#include <unistd.h>

int unlink(const char *pathname);

20. Moving 
#include <stdio.h>

int rename(const char *oldpath, const char *newpath);

21. Monitoring File Events
21.1 Initializing inotify
#include <sys/inotify.h>

int inotify_init1(int flags);
The flags parameter is usually 0, but may be a bitwise OR of the following flags:
IN_CLOEXEC
IN_NONBLOCK

errno:
EMFILE
ENFILE
ENOMEN

example:

int fd;

fd = inotify_init1(0);
if (fd == -1){
     perror("inotify_init1");
     exit(EXIT_FAILURE);
}

21.2 Watches

#include <sys/inotify>

int inotify_add_watch(int fd, const char *path, uint32_t mask);

mask:
IN_ACCESS
IN_MODIFY
IN_ATTRIB
IN_CLOSE_WRITE
IN_CLOSE_NOWRITE
IN_OPEN
IN_MOVED_FROM
IN_MOVED_TO
IN_CREATE
IN_DELETE
IN_DELETE_SELF
IN_MOVE_SELF

The following events are also definedm grouping two or more events into a single value:
IN_ALL_EVENTS
IN_CLOSE
IN_MOVE

21.3 inotify Events

#include <sys/inotify.h>

struct inotify_event{}
     int wd;
     uint32_t mask;
     uint32_t cookie;
     uint32_t len;
     char name[];
};

21.4 Reading inotify events
21.5 Advanced inotify events

IN_IGNORED
IN_ISDIR
IN_Q_OVERFLOW
IN_UNMOUNT

21.6 Removing an inotify Watch
#include <inotify.h>

int inotify_rm_watch(int fd, uint32_t wd);

版权声明:本文博客原创文章。博客,未经同意,不得转载。

Linux System Programming note 8 ——File and Directory Management的更多相关文章

  1. CMake error:System Error:No such file or directory CMake error:Could not open file for write in copy operation xxxx.ros_Config.cmake.tmp.

    微型电脑或嵌入式与电脑还是有点不同的,在微型电脑上ros indigo 版本下利用catkin编译如果你遇到如下错误: CMake error:System Error:No such file or ...

  2. fatal error: linux/videodev.h: No such file or directory

    Run Build Command:"/usr/bin/make" "cmTC_162a3/fast"/usr/bin/make -f CMakeFiles/c ...

  3. linux/videodev.h: No such file or directory错误解决方法

    sudo apt-get install libv4l-dev* file yum install libv4l-dev* yum install libv4l-dev* 上面错误的问题是两个2.4以 ...

  4. Linux System Programming --Chapter Seven

    文件和目录管理 一.文件与其元数据 我们首先看一下一个简单的文本文件是怎么保存的: 打开vim,编辑一段文本: [root@localhost ~]# vim hello.txt 编辑内容如下: op ...

  5. Linux,Docker,Jenkins No such file or directory

    你们先休息下,我先哭哭! 今天在做交接项目的bug修改的时候,在创建文件的时候报错 No such file or directory 然后跟着路径去linux中查看了该路径,但确实存在,并且权限都是 ...

  6. linux/module.h: No such file or directory 内核模块编译过程

    1.缺少Linux kernel头文件 To install just the headers in Ubuntu: sudo apt-get install linux-headers-$(unam ...

  7. Linux System Programming 学习笔记(八) 文件和目录管理

    1. 文件和元数据 每个文件都是通过inode引用,每个inode索引节点都具有文件系统中唯一的inode number 一个inode索引节点是存储在Linux文件系统的磁盘介质上的物理对象,也是L ...

  8. Linux System Programming 学习笔记(六) 进程调度

    1. 进程调度 the process scheduler is the component of a kernel that selects which process to run next. 进 ...

  9. Linux System Programming 学习笔记(四) 高级I/O

    1. Scatter/Gather I/O a single system call  to  read or write data between single data stream and mu ...

随机推荐

  1. AdaBoost中利用Haar特征进行人脸识别算法分析与总结1——Haar特征与积分图

    原地址:http://blog.csdn.net/watkinsong/article/details/7631241 目前因为做人脸识别的一个小项目,用到了AdaBoost的人脸识别算法,因为在网上 ...

  2. VMwave下Ubuntu扩展磁盘空间

    VMwave下Ubuntu扩展磁盘空间 Ubuntu原预装磁盘空间20G,随着系统安装软件越来越多,空间慢慢不够用. 打算安装DB2,许扩展磁盘空间. 环境: No LSB modules are a ...

  3. No-Touch Integration 在SharePoint中使用社区支持的Silverlight应用程序

    No-Touch Integration 在SharePoint中使用社区支持的Silverlight应用程序         No-Touch Integration应该是最简单的方法了.将Silv ...

  4. block存储区域——怎样验证block在栈上,还是堆上

    Block存储区域 首先,须要引入三个名词: ● _NSConcretStackBlock ● _NSConcretGlobalBlock ● _NSConcretMallocBlock 正如它们名字 ...

  5. freemarker自己定义标签(二)

    freemarker自己定义标签 1.自己定义标签 通过自己定义标签,写一个反复指定字符串 2.实现源代码 <html> <head> <meta http-equiv= ...

  6. 上下文菜单与TrackPopupMenu

    这算是一个演示程序吧,想不到上下文菜单也是採用ON_COMMAND宏来进行消息映射,在这里,我发现一个问题:从CWnd派生的类ON_UPDATE_COMMAND_UI_RANGE似乎没有效果,不知道应 ...

  7. 基于WEB 的认证防火墙的设计

    项目要求: 1.  采用Linux iptbles作为接入防火墙,默认放行所以访问入口的80端口 2.  访问者通过http://x.x.x.x 访问防火墙的认证系统,进行账号的登陆操作,同时系统对用 ...

  8. Little Sympathy for Bear Stearns : NPR

    Little Sympathy for Bear Stearns : NPR Little Sympathy for Bear Stearns

  9. java 线程 ProducerAndConsumer

    package j2se.thread.demo; /** * <p>Project:J2SE 的基础知识</p> * <p>Tile:多线程模拟 生产者 和 消费 ...

  10. mongodb - 前端form表单数据传输,在保存和清除的数据格式的处理程序的 - 非递归

    //处理时间段,将ISODate("2014-10-09T18: 37: 50.0Z") 兑换 2014-10-09 18:37:50这样的格式 //截至处理6层树形结构数据,当多 ...