linux系统编程之文件与I/O（四） 文件的属性

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

int fstat(int fd, struct stat *buf);

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

stat() stats the file pointed to by path and fills in buf.

lstat()  is  identical to stat(), except that if path is a symbolic link, then the link itself is stat-ed, not the file that it refers to.

fstat() is identical to stat(), except that the file to be stat-ed is specified by the file descriptor fd.

二、stat结构体

struct stat {

dev_t     st_dev;     /* ID of device containing file */

ino_t     st_ino;     /* inode number */

mode_t    st_mode;    /* protection */

nlink_t   st_nlink;   /* number of hard links */

uid_t     st_uid;     /* user ID of owner */

gid_t     st_gid;     /* group ID of owner */

dev_t     st_rdev;    /* device ID (if special file) */

off_t     st_size;    /* total size, in bytes */

blksize_t st_blksize; /* blocksize for file system I/O */

blkcnt_t  st_blocks;  /* number of 512B blocks allocated */

time_t    st_atime;   /* time of last access */

time_t    st_mtime;   /* time of last modification */

time_t    st_ctime;   /* time of last status change */

};

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