#ifndef __SYS_STAT_H__
# define __SYS_STAT_H__

#ifdef __cplusplus
extern "C" {
#endif

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

/* File types; taken from inode(7), any values would probably work. */
#define S_IFMT       0170000
#define S_IFIFO      0010000   /* FIFO */
#define S_IFCHR      0020000   /* Character device */
#define S_IFDIR      0040000   /* Directory */
#define S_IFBLK      0060000   /* Block device */
#define S_IFREG      0100000   /* Regular file */
#define S_IFLNK      0120000   /* Symbolic link */
#define S_IFSOCK     0140000   /* Socket */

/* Shortcuts to check file types from a mode_t value */
#define S_ISREG(m)   (((m) & S_IFMT) == S_IFREG)
#define S_ISDIR(m)   (((m) & S_IFMT) == S_IFDIR)
#define S_ISCHR(m)   (((m) & S_IFMT) == S_IFCHR)
#define S_ISBLK(m)   (((m) & S_IFMT) == S_IFBLK)
#define S_ISFIFO(m)  (((m) & S_IFMT) == S_IFIFO)
#define S_ISLNK(m)   (((m) & S_IFMT) == S_IFLNK)
#define S_ISSOCK(m)  (((m) & S_IFMT) == S_IFSOCK)

/* Protection bits of a mode_t  */
#define S_ISUID      0004000   /* Set user ID on execution */
#define S_ISGID      0002000   /* Set group ID on execution */
#define S_ISVTX      0001000   /* Sticky bit */
/* Usual permissions */
#define S_IRWXU      00700
#define S_IRUSR      00400
#define S_IWUSR      00200
#define S_IXUSR      00100
#define S_IRWXG      00070
#define S_IRGRP      00040
#define S_IWGRP      00020
#define S_IXGRP      00010
#define S_IRWXO      00007
#define S_IROTH      00004
#define S_IWOTH      00002
#define S_IXOTH      00001

struct stat {
    off_t      st_size;
    mode_t     st_mode;

    /* In gint, the struct stat only has the file size and file type. The
       protection bits of (st_mode) are always 00777. The following fields all
       have undefined values. */

    dev_t      st_dev;
    ino_t      st_ino;
    nlink_t    st_nlink;
    uid_t      st_uid;
    gid_t      st_gid;
    dev_t      st_rdev;
    blksize_t  st_blksize;
    blkcnt_t   st_blocks;

    struct timespec st_atim;
    struct timespec st_mtim;
    struct timespec st_ctim;
};

#define st_atime st_atim.tv_sec
#define st_mtime st_mtim.tv_sec
#define st_ctime st_ctim.tv_sec

/* Obtain information about an entry in the filesystem. */
extern int stat(char const * __restrict__ __pathname,
    struct stat * __restrict__ __statbuf);

extern int chmod(char const *__pathname, mode_t mode);

extern int fstat(int __fd, struct stat *__buf);

#ifdef __cplusplus
}
#endif

#endif /*__SYS_STAT_H__*/