f280804c96
header. Sys/param.h includes sys/types.h internally unless LOCORE is defined. Approved by: des (mentor)
117 lines
2.4 KiB
Groff
117 lines
2.4 KiB
Groff
.\" Author: Juli Mallett <jmallett@FreeBSD.org>
|
|
.\" Date: June 04, 2003
|
|
.\" Description:
|
|
.\" Manual page for libufs functions:
|
|
.\" getino(3)
|
|
.\" putino(3)
|
|
.\"
|
|
.\" This file is in the public domain.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd June 04, 2003
|
|
.Dt GETINO 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm getino , putino
|
|
.Nd get and put inodes to and from UFS disks
|
|
.Sh LIBRARY
|
|
.Lb libufs
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In sys/mount.h
|
|
.In ufs/ufs/ufsmount.h
|
|
.In ufs/ufs/dinode.h
|
|
.In ufs/ffs/fs.h
|
|
.In libufs.h
|
|
.Ft int
|
|
.Fn getino "struct uufsd *disk" "void *dino" "ino_t inode"
|
|
.Ft int
|
|
.Fn putino "struct uufsd *disk" "void *dino" "ino_t inode"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn getino
|
|
and
|
|
.Fn putino
|
|
functions provide the ability to put an inode to disk or read an
|
|
inode from disk for
|
|
.Xr libufs 3
|
|
consumers.
|
|
The
|
|
.Fn getino
|
|
function reads the inode specified by
|
|
.Fa inode ,
|
|
and puts a pointer to an inode with the correct type into the memory
|
|
pointed to by
|
|
.Fa dino .
|
|
It maintains a cache of nearby inodes, and may simply return pointers
|
|
into memory that are in said cache.
|
|
The pointer it returns may be modified as if it were of the type
|
|
.Dq struct ufs1_dinode
|
|
or
|
|
.Dq struct ufs2_dinode
|
|
depending on whether the disk being operated on is UFS1 or UFS2,
|
|
respectively.
|
|
.Pp
|
|
The
|
|
.Fn putino
|
|
function puts an inode specified to be
|
|
.Fa inode
|
|
to disk, given memory passed in the
|
|
.Fa dino
|
|
pointer, in exactly the same manner as an inode is retrieved into
|
|
.Fa dino
|
|
by
|
|
.Fn getino .
|
|
Calls to
|
|
.Fn putino
|
|
immediately invalidate the inode cache.
|
|
.Pp
|
|
Both functions return 0 on success and -1 on error.
|
|
.Sh ERRORS
|
|
The function
|
|
.Fn getino
|
|
may fail and set
|
|
.Va errno
|
|
for any of the errors specified for the library functions
|
|
.Xr bread 3
|
|
and
|
|
.Xr malloc 3 .
|
|
Additionally, error may be returned if the inode format cannot be
|
|
determined.
|
|
Error reporting conventions for
|
|
.Xr libufs 3
|
|
functions are followed.
|
|
.Pp
|
|
The function
|
|
.Fn putino
|
|
may fail and set
|
|
.Va errno
|
|
for any of the errors specified for the library functions
|
|
.Xr bwrite 3 .
|
|
Additionally, error may be returned if the inode format cannot be
|
|
determined, or if the
|
|
.Fa dino
|
|
parameter is
|
|
.Dv NULL .
|
|
In the latter case, where
|
|
.Fa dino
|
|
is unusable,
|
|
.Va errno
|
|
is set to
|
|
.Er EDOOFUS .
|
|
Error reporting conventions for
|
|
.Xr libufs 3
|
|
functions are followed.
|
|
.Sh SEE ALSO
|
|
.Xr bread 3 ,
|
|
.Xr bwrite 3 ,
|
|
.Xr libufs 3
|
|
.Sh HISTORY
|
|
These functions first appeared as part of
|
|
.Xr libufs 3
|
|
in
|
|
.Fx 5.1 .
|
|
.Sh AUTHORS
|
|
.An Juli Mallett Aq jmallett@FreeBSD.org
|