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 defined by <sys/ino.h>.

/* Inode structure as it appears on a disk block */

struct      dinode {
    u_short di_mode;        /* mode and type of file */
    short   di_nlink;       /* number of links to file */
    short   di_uid;         /* owner’s user id */
    short   di_gid;         /* 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, currently unused */
    long    di_blocks;      /* blocks actually held */
    long    di_gen;         /* file generation number */
    long    di_fversion;    /* file version number */
    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 structure:

/* Continuation inode 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 ci_acl[NOPTENTRIES];
    char    ci_spare[46];   /* reserved, currently unused */
};

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 /usr/include/sys/inode.h for the definition of these values.

See /usr/include/sys/inode.h for the definition of inode structures for special files, pipes, or FIFO s.

WARNINGS

Access Control Lists

Access control list descriptions in this entry apply only to standard HP-UX operating systems. If HP-UX BLS software has been installed, access control lists are handled differently. Refer to HP-UX BLS documentation for information about access control lists in the HP-UX BLS environment.

FILES

/usr/include/sys/ino.h

AUTHOR

AT&T, the University of California, Berkeley and HP.

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