05-29-2008
As far as I know, they may be files, but they aren't *regular* files.
But in any case, do you want to understand the inner workings of the operating system just to satisfy your curiosity, or do you actually have a practical problem to which the understanding of this may come in handy?
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1
2
3
4
5
6
1
2
3
4
5
6
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udfs(7FS) File Systems udfs(7FS)
NAME
udfs - universal disk format file system
DESCRIPTION
The udfs file system is a file system type that allows user access to files on Universal Disk Format (UDF) disks from within the Solaris
operating environment. Once mounted, a udfs file system provides standard Solaris file system operations and semantics. That is, users can
read files, write files, and list files in a directory on a UDF device and applications can use standard UNIX system calls on these files
and directories.
Because udfs is a platform-independent file system, the same media can be written to and read from by any operating system or vendor.
Mounting File Systems
udfs file systems are mounted using:
mount-F udfs -o rw/ro device-special
Use:
mount /udfs
if the /udfs and device special file /dev/dsk/c0t6d0s0 are valid and the following line (or similar line) appears in your /etc/vfstab
file:
/dev/dsk/c0t6d0s0 - /udfs udfs - no ro
The udfs file system provides read-only support for ROM, RAM, and sequentially-recordable media and read-write support
on RAM media.
The udfs file system also supports regular files, directories, and symbolic links, as well as device nodes such as block, character, FIFO,
and Socket.
SEE ALSO
mount(1M), mount_udfs(1M), vfstab(4)
NOTES
Invalid characters such as "NULL" and "/" and invalid file names such as "." and ".." will be translated according to the following rule:
Replace the invalid character with an "_," then append the file name with # followed by a 4 digit hex representation of the 16-bit CRC of
the original FileIdentifier. For example, the file name ".." will become "__#4C05"
SunOS 5.10 29 Mar 1999 udfs(7FS)