include/sys/stat.h and include/sys/types.h: Update struct stat to confirm opengroup spec:

https://pubs.opengroup.org/onlinepubs/009695399/basedefs/sys/stat.h.html

include/sys/stat.h

@@ -124,13 +124,19 @@ struct stat
 {
   /* Required, standard fields */
 
+  dev_t     st_dev;     /* Device ID of device containing file */
+  ino_t     st_ino;     /* File serial number */
   mode_t    st_mode;    /* File type, attributes, and access mode bits */
+  nlink_t   st_nlink;   /* Number of hard links to the file */
+  uid_t     st_uid;     /* User ID of file */
+  gid_t     st_gid;     /* Group ID of file */
+  dev_t     st_rdev;    /* Device ID (if file is character or block special) */
   off_t     st_size;    /* Size of file/directory, in bytes */
-  blksize_t st_blksize; /* Block size used for filesystem I/O */
-  blkcnt_t  st_blocks;  /* Number of 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 */
+  blksize_t st_blksize; /* Block size used for filesystem I/O */
+  blkcnt_t  st_blocks;  /* Number of blocks allocated */
 
   /* Internal fields.  These are part this specific implementation and
    * should not referenced by application code for portability reasons.

include/sys/types.h

@@ -165,6 +165,10 @@ typedef uint16_t     dev_t;
 
 typedef uint16_t     ino_t;
 
+/* nlink_t is used for link counts */
+
+typedef uint16_t     nlink_t;
+
 /* pid_t is used for process IDs and process group IDs. It must be signed because
  * negative PID values are used to represent invalid PIDs.
  */