NAME    [Toc]    [Back]

     sbread, sbwrite -- read and write superblocks of a UFS filesystem

LIBRARY    [Toc]    [Back]

     UFS File System Access Library (libufs, -lufs)

SYNOPSIS    [Toc]    [Back]

     #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>

     int
     sbread(struct uufsd *disk);

     int
     sbwrite(struct uufsd *disk, int all);

DESCRIPTION    [Toc]    [Back]

     The sbread() and sbwrite() functions provide superblock reads and writes
     for libufs(3) consumers.  The sbread() and sbwrite() functions operate on
     the superblock field, d_sb, associated with a given userland UFS disk
     structure.  Additionally, the sbwrite() function will write to all
     superblock locations if the all value is non-zero.

     The sbread() and sbwrite() functions return 0 on success or -1 on error.

ERRORS    [Toc]    [Back]

     The function sbread() may fail and set errno for any of the errors specified
 for the library function bread(3).  Additionally, it may follow the
     libufs(3) error methodologies in situations where no usable superblock
     could be found.

     The function sbwrite() may fail and set errno for any of the errors specified
 for the library function bwrite(3).

SEE ALSO    [Toc]    [Back]

     bread(3), bwrite(3), libufs(3)

HISTORY    [Toc]    [Back]

     These functions first appeared as part of libufs(3) in FreeBSD 5.0.

AUTHORS    [Toc]    [Back]

     Juli Mallett <jmallett@FreeBSD.org>


FreeBSD 5.2.1			 June 04, 2003			 FreeBSD 5.2.1