Expand ufs Filesystems Post: 302252682

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LEARN ABOUT FREEBSD

libufs

LIBUFS(3)						   BSD Library Functions Manual 						 LIBUFS(3)

NAME

     libufs -- operate on UFS file systems from userland

LIBRARY

     UFS File System Access Library (libufs, -lufs)

SYNOPSIS

     #include <sys/param.h>
     #include <sys/mount.h>
     #include <ufs/ufs/ufsmount.h>
     #include <ufs/ufs/dinode.h>
     #include <ufs/ffs/fs.h>
     #include <libufs.h>

DESCRIPTION

     The libufs library and the functions it provides are used for implementing utilities which need to access a UFS file system at a low level
     from userland.  Facilities provided are used to implement utilities such as newfs(8) and dumpfs(8).  The libufs library is designed to be
     simple, and to provide functions that are traditionally useful to have.

     A disk is represented as the type struct uufsd as defined in <libufs.h>.  The structure is filled out, operations are performed, and the disk
     is closed.

ERRORS

     Functions provided by libufs return -1 in every functional error situation.  They also set the d_error field of struct uufsd to a string
     describing the error.

SEE ALSO

     bread(3), bwrite(3), cgread(3), cgread1(3), cgwrite1(3), sbread(3), sbwrite(3), ufs_disk_close(3), ufs_disk_fillout(3),
     ufs_disk_fillout_blank(3), ufs_disk_write(3), ffs(7)

HISTORY

     The libufs(3) library first appeared in FreeBSD 5.0.

AUTHORS

     Juli Mallett <jmallett@FreeBSD.org>

     Additional design, feedback, and ideas were provided by Poul-Henning Kamp <phk@FreeBSD.org>.

BSD
								   June 4, 2003 							       BSD