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发表于 2004-04-08 17:32 |只看该作者 |倒序浏览

各位老大：我第一次写这种东西，抛砖引玉，欢迎大家狠劲儿砸我。

需要了解的命令：lofiadm(1M), mount(1M)
必须使用root权限。
比如说我有一个文件Winxp.ISO是一个标准的光盘映像文件，放置在/tmp下面。
键入如下命令：
# lofiadm -a /tmp/Winxp.ISO
/dev/lofi/1
#
等到提示符出现就说明虚拟的设备点已经生成。系统所返回的是一个block device 为止，但是同时系统其实还提供了一个raw device在：/dev/rlofi/1
对于raw device的操作，诸如fsck之类，必须对这个device 做才会有效。
然后，
# mkdir /mount_ISO
# mount -F hsfs /dev/lofi/1 /mount_ISO

到此为止你就可以在/mount_ISO下面像在光盘里面一样执行命令了。

删除设备：
# umount /mount_ISO
( 如果不成功，可以使用-f选项枪支卸载)
# lofiadm -d /tmp/Winxp.ISO

下面是相关的man页：
lofi:
Devices                                                 lofi(7D)
NAME
   lofi - Loopback file driver

DESCRIPTION
   The lofi file driver exports  a  file  as  a  block  device.
   Reads and writes to the block device are translated to reads
   and writes on the underlying file. This is useful  when  the
   file  contains a file system image.  Exporting it as a block
   device through the  lofi file driver  allows  normal  system
   utilities  to  operate on the image through the block device
   (like fstyp(1M)fsck(1M), and mount(1M). This is  useful  for
   accessing  CD-ROM and FAT floppy images. See lofiadm(1M) for
   examples.

   File block device entries are contained in /dev/lofi,  while
   /dev/rlofi  contains  the character (or raw) device entries.
   Entries are in  the  form  of decimal  numbers  which  are
   assigned  through  lofiadm(1M).  When  created, these device
   entries are owned by root, in group sys,  and  have  permis-
   sions  0600. While ownership, group, and permission settings
   can be  altered,  there  are  possible  ramifications. See
   lofiadm(1M) for more information.

FILES
   /dev/lofictl
         Master control device

   /dev/lofi/n
         Block device for file n

   /dev/rlofi/n
         Character device for file n

   /kernel/drv/lofi
         32-bit driver

   /kernel/drv/lofi.conf
         Driver configuration file. (Should not be altered.)

   /kernel/drv/sparcv9/lofi
         64-bit driver

ATTRIBUTES
   See  attributes(5) for descriptions of the following  attri-
   butes:

SunOS 5.8          Last change: 30 Jul 1999                   1

SEE ALSO
   lofiadm(1M),  fsck(1M),  fstyp(1M),  mount(1M), newfs(1M),
   attributes(5)

NOTES
   Just as you would not directly access a disk device that has
   mounted  file  systems, you should not access a file associ-
   ated with a  block  device  except  through  the  lofi  file
   driver.

   For compatability purposes, a raw device  is  also  exported
   along with the block device. For example, newfs(1M) requires
   one.

hsfs:

File Systems                                           hsfs(7FS)

NAME
   hsfs - High Sierra & ISO 9660 CD-ROM file system

DESCRIPTION
   HSFS is a file system type that allows users access to files
   on  High Sierra or  ISO 9660 format CD-ROM disks from within
   the SunOS operating system. Once mounted, a HSFS file system
   provides standard SunOS read-only file system operations and
   semantics.  That is, users can read files and list files  in
   a  directory on a High Sierra or ISO 9660 CD-ROM, and appli-
   cations can use standard UNIX system calls  on  these  files
   and directories.

   This file system also contains support for  the  Rock  Ridge
   Extensions.  If the  extensions  are contained on the  CD-
   ROM, then the file system will provide all of the file  sys-
   tem semantics and file types of  UFS, except for writability
   and hard links.