hfm(4)                           DG/UX 5.4.2                          hfm(4)


NAME
       hfm - high sierra file manager

DESCRIPTION
       The DG/UX kernel provides configurable support for High Sierra and
       ISO 9660 formatted Compact Discs (CDs).  The high sierra file manager
       lets the system administrator mount a CD into the UNIX file system
       hierarchy.  A mounted CD will appear as a readonly UNIX file system.
       The mode of all files from the CD will be readonly and executable for
       user, group and other.

       Filenames in High Sierra or ISO 9660 format are uppercase, but for
       convenience, they are translated to lowercase by the high sierra file
       manager.  All input filenames are similarly translated to uppercase.
       High Sierra and ISO 9660 mounted file systems can be NFS exported in
       the same way as any normal DG/UX file system.  The mount point must
       be added to /etc/exports and the exportfs(1M) command must be
       executed after the file system is mounted.  This will be automatic if
       the mount of the CD is in your /etc/fstab file.  Since most current
       CDs available in high sierra or ISO 9660 format are for PC's, the
       high sierra file manager will be most useful when used with a DOS
       emulator.

       In order to use the high sierra file manager, you must configure the
       hfm() pseudo device into your kernel.

       sd(insc(),*)
       st(insc(),*)
       inen()
       loop()
       pmt()
       prf()
       meter()
       hfm()          # this is the line that must be added.

       Once the kernel is built and running, you may use the mount(1M)
       command to add the high sierra or ISO 9660 file system to the UNIX
       file system hierarchy.

            mount -t cdrom /dev/pdsk/4 /pdd/cdrom

       The special device mentioned in the mount command is the block
       special representation of the CD device in /dev/pdsk.  The type
       "cdrom" must be used with mount to route the mount request to the
       correct file manager.

       You may add a line to the /etc/fstab file to have the mount occur
       when the system is brought up to init level 3.

       /dev/pdsk/4    /pdd/cdrom     cdrom ro x 0

       The umount(1M) command may be used to unmount the CD from the file
       system hierarchy




Licensed material--property of copyright holder(s)                         1

hfm(4)                           DG/UX 5.4.2                          hfm(4)


            umount /pdd/cdrom

       To export the file system on the CD, in lieu of adding it to
       /etc/exports:

            exportfs -iv /pdd/cdrom

       When the mount(1M) command is issued, the CD device will lock the CD
       platter into the unit until a successful umount(1M) is issued.

       The high sierra file manager does not support the path table or the
       extended attribute record from files on the CD, as these are
       unnecessary to the UNIX file system implementation.

       ISO-9660 CDs display a version number after the file name.  This can
       be removed with the noversion option to mount(1M).  See the mount(1M)
       man page for details.

SEE ALSO
       config(1M), exportfs(1M), mount(1M), umount(1M), fstab(4).





































Licensed material--property of copyright holder(s)                         2