pip - CD-ROM workbench
Pip is a SCSI I/O program centered around a SCSI disk of files called tracks. Various
commands will load and store tracks from and to various CD-ROM readers, writers, and
files. Pip was written to be run on a stand-alone workstation so that the I/O data rates
required for CD-audio can be sustained.
When pip starts, it probes the SCSI bus and looks for one of the following disks. The ta-
ble in the program should be extended to include your favorite disk. The program does not
recognize just any disk because it might scribble on precious data.
Pip looks for the following device for the CD ROM writer.
Pip looks for one of the following devices for the CD ROM reader. The Philips will not
read cdda format and the NEC does not work well with pip. The Toshiba does not accurately
seek on cdda media. We recommend the Plextor. The first column is the device name that
should be given in the interactive commands.
plex PLEXTOR CD-ROM PX-4XCS
tosh TOSHIBA CD-ROM DRIVE:XM
phil IMS CDD521/10
nec NEC CD-ROM DRIVE:5001.0
nec NEC CD-ROM DRIVE:8411.0
The following commands are recognized.
help Print a one line description of each command.
load device track format disktrack
A track is copied from the device to the designated track on the disk. The track
is a number or *, designating all tracks. If the copy completes normally, the old
data on that disk track is lost. format is either cdda or cdrom.
verif device track format disktrack
This is the same as load except that the data is not copied, but compared to the
data on the disk. The compare allows a slip of multiples of four bytes as might
occur copying an audio CD with imprecise seek.
store track file
The disk track is written to a regular Plan 9 file. The track may be a number or
*. If the track is *, then the string file is prefixed to the track number for
Will print the table of contents of the specified device. If no device is given,
then the track table of contents of the disk is given.
All tracks on the disk are deleted.
The specified track on the disk is deleted.
The specified disk track is read and checksummed.
The specified disk track is copied to the next track on the Philips CD writer. The
format of the data is not specified until the table of contents is written.
Although it is not required, it is usual that all tracks are the same format.
Issue a fixate command to the Philips CD writer. Format is either cdda or cdrom.
This makes the table of contents permanent.
Issue a session command to the Philips CD writer. This is the same as fixate
except that a second session is opened and more data may be put on the CD. Most
readers can only see the table of contents from the first session.
9660 proto track
A filesystem description is read from the proto file in mkfs(8) format. The file
system is converted to ISO 9660 format and written on the specified disk track.
The first line of the proto file for the 9660 command is parsed for options. The follow-
ing options are recognized.
-c Convert all file names in the file system so that they conform to 9660 standards.
(Roughly this is eight or fewer single case alphanumerics followed by an optional
period and three or fewer single case alphanumerics.) File names that conform are
converted from lower case letters in the input file system to upper case in the
output file system. Names that do not conform are renamed to Fnumber and directo-
ries are renamed Dnumber. A file named _CONFORM.MAP is created in the root of the
output file system with old-name new-name pairs of all converted files.
-e Add a system-use field to every directory record that contains the name, uid, gid,
and mode of the file. With or without this extension, directory records conform to
the 9660 standard and should be able to be read on other systems.
Places the named file in the abstract field of the primary volume descriptor. The
file must be in the root directory.
Places the named file in the bibliographic field of the primary volume descriptor.
The file must be in the root directory.
Places the named file in the copyright field of the primary volume descriptor. The
file must be in the root directory.
-s dir Prefix the directory name dir to the names of files in the proto file. This per-
mits a file tree to be assembled cleanly under a special directory, to be then
copied into the new file system at the root.
-v Print each file name as it is copied.
All dates in the output file system are set to the date the command was executed. The
volume identifier field of the primary volume descriptor is set to the last component of
the proto file name. The system identifier field of the primary volume descriptor is set
to PLAN 9, and should be keyed to the interpretation of the system-use fields of the
To cut your own audio CD with your favorite CDs:
load plex 5 cdda 1 # read track 5 from an audio CD
load plex 2 cdda 2 # read track 2 from an audio CD
load ... # etc.
publish * # write all tracks to Philips CD writer
fixate cdda # write table of contents
To cut your own 9660 CD-ROM:
mount /srv/bootes /n/bootes # make a clean, bind-free tree
9660 mkfs 4 # make a 9660 image from a mkfs specification
# for the Plan 9 distribution
# the first line of mkfs is
# -s /n/bootes -c -e -n notice
publish 4 # write 9660 image to Philips CD writer
fixate cdrom # write table of contents
The program only knows about a few devices. The tables and device code must be extended
to be more comprehensive. The industry has not adopted a standard way to read and write