HP-UX Reference (11i v1 05/09) - 4 File Formats (vol 8)

i
inode(4) inode(4)
NAME
inode - format of an inode
SYNOPSIS
#include <sys/types.h>
#include <sys/ino.h>
DESCRIPTION
An inode for a plain file or directory in a file system has the following structure as it appears on a disk
block, defined in <sys/ino.h> .
struct dinode {
u_short di_mode; /* mode and type of file */
short di_nlink; /* number of links to file */
short di_uid_lsb; /* owner’s user id */
short di_gid_lsb; /* owner’s group id */
quad di_size; /* number of bytes in file */
time_t di_atime; /* time last accessed */
long di_atspare;
time_t di_mtime; /* time last modified */
long di_mtspare;
time_t di_ctime; /* time of last file status change */
long di_ctspare;
daddr_t di_db[NDADDR]; /* disk block addresses */
daddr_t di_ib[NIADDR]; /* indirect blocks */
long di_flags; /* status */
long di_blocks; /* blocks actually held */
long di_gen; /* file generation number */
short di_uid_msb; /* owner’s user id (top 16 bits) */
short di_gid_msb; /* owner’s group id (top 16 bits) */
long di_spare[2]; /* reserved, currently unused */
ino_t di_contin; /* continuation inode number */
};
A continuation inode contains a file’s optional access control list (ACL) entries, and has the following struc-
ture as it appears on a disk block:
struct cinode {
u_short ci_mode; /* mode and type of file */
short ci_nlink; /* number of links to file */
/* optional ACL entries */
struct acl_entry_internal_lsb ci_acl_lsb[NOPTENTRIES];
/* least sig bytes of ACL uids/gids */
struct acl_entry_internal_msb ci_acl_msb[NOPTENTRIES];
/* most sig bytes of ACL uids/gids */
char ci_spare[3]; /* reserved, currently unused */
long ci_ciflags; /* status */
};
For the meaning of the defined types u_short, quad, daddr_t, and time_t, see types(5).
Continuation inodes are distinguished from other inodes by their file type. See <sys/inode.h>
for the
definition of these values.
See
<sys/inode.h> for the definition of inode structures for special files, pipes, or FIFOs.
WARNINGS
Kernel internal structures may change from release to release without warning. Applications directly rely-
ing on these structures are not supported.
AUTHOR
AT&T, the University of California, Berkeley, and HP.
HP-UX 11i Version 1: September 2005 − 1 − Hewlett-Packard Company Section 4−−139