hfm(4)                     DG/UX 4.30                      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(8) 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



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

     hfm(4)                     DG/UX 4.30                      hfm(4)



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

               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.

     SEE ALSO
          mount(1M), umount(1M), config(1M), fstab(4), exportfs(8).


































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