ufs_disk_close(3) [freebsd man page]

UFS_DISK_CLOSE(3)					   BSD Library Functions Manual 					 UFS_DISK_CLOSE(3)

NAME

     ufs_disk_close, ufs_disk_fillout, ufs_disk_fillout_blank, ufs_disk_write -- open and close userland UFS disks

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>

     int
     ufs_disk_close(struct uufsd *disk);

     int
     ufs_disk_fillout(struct uufsd *disk, const char *name);

     int
     ufs_disk_fillout_blank(struct uufsd *disk, const char *name);

     int
     ufs_disk_write(struct uufsd *disk);

DESCRIPTION

     The ufs_disk_close() function closes a disk and frees internal memory related to it.  It does not free the disk structure.

     The ufs_disk_fillout() and ufs_disk_fillout_blank() functions open a disk specified by name and populate the structure pointed to by disk.
     The disk is opened read-only.  The specified name may be either a mountpoint, a device name or a filesystem image.  The ufs_disk_fillout()
     function assumes there is a valid superblock and will fail if not, whereas the ufs_disk_fillout_blank() function makes no assumptions of that
     sort.

     The ufs_disk_write() function attempts to re-open a disk as writable if it is not currently.

ERRORS

     The function ufs_disk_close() has no failure points.

     The function ufs_disk_fillout() may fail for any of the reasons ufs_disk_fillout_blank() might, as well as for any reason sbread(3) might.

     The ufs_disk_fillout_blank() may fail and set errno for any of the errors specified for the library functions open(2), strdup(3).	Addition-
     ally, it may follow the libufs(3) error methodologies in situations where no device could be found to open.

     The function ufs_disk_write() may fail and set errno for any of the errors specified for the library functions open(2) and stat(2).  Namely,
     it will fail if the disk in question may not be written to.

SEE ALSO

     open(2), getfsfile(3), libufs(3), sbread(3)

HISTORY

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

AUTHORS

     Juli Mallett <jmallett@FreeBSD.org>

BSD
								   June 4, 2003 							       BSD

Check Out this Related Man Page

CGREAD(3)						   BSD Library Functions Manual 						 CGREAD(3)

NAME

     cgread, cgread1, cgwrite1 -- read/write cylinder groups of UFS disks

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>

     int
     cgread(struct uufsd *disk);

     int
     cgread1(struct uufsd *disk, int c);

     int
     cgwrite1(struct uufsd *disk, int c);

DESCRIPTION

     The cgread() and cgread1() functions provide cylinder group reads for libufs(3) consumers.  The cgread1() function reads from one cylinder
     group, specified by c into the d_cg field of a userland UFS disk structure.  It sets the d_lcg field to the cylinder group number c.

     The cgread() function operates on sequential cylinder groups.  Calling the cgread() function is equivalent to calling cgread1() with a cylin-
     der group specifier equivalent to the value of the current d_ccg field, and then incrementing the d_ccg field.

     The cgwrite1() function stores cylinder group specified by c from d_cg field of a userland UFS disk structure on disk.

RETURN VALUES

     Both functions return 0 if there are no more cylinder groups to read, 1 if there are more cylinder groups, and -1 on error.

ERRORS

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

     The function cgread1() has semantically identical failure conditions to those of cgread().

     The function cgwrite1() may fail and set errno for any of the errors specified for the library function bwrite(3).

SEE ALSO

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

HISTORY

     These functions first appeared as part of libufs(3) in FreeBSD 5.1.

AUTHORS

     Juli Mallett <jmallett@FreeBSD.org>

BSD
								   June 4, 2003 							       BSD

Linux and UNIX Man Pages

ufs_disk_close(3) [freebsd man page]

Check Out this Related Man Page