cpio,
and
mt,
mount
and
umount,
these commands are as described in the
System V Interface Definition, Third Edition (SVID 3).
-D option to cpiocpio
command must support the -D option.
-D is used by the SVR4 packaging tools,
and has been found to be necessary
for installation of third party software which resides on multi-file
tapes. -D disables tape read ahead and automatic volume switching.
mt
command is a magnetic tape manipulation program, with
the following syntax:
mt -f tapename command [ count ]
mt
is used to give commands to a magnetic tape drive.
Note that
tapename
must reference a raw (not block) tape device.
By default,
mt
performs the requested operation once.
Operations may be performed multiple times by specifying
count.
Valid choices for command are as follows:
A rewind media command for a partitioned 4mm DDS tape will take
you to the first block of the current partition, not the physical beginning
of media. The specification of commands to deal with partitioned DDS media
is outside the current scope of the ABI.
mt
returns a 0 exit status upon successful completion, 1 if
the command was unrecognized, and 2 if an operation failed.
Differences are known to exist among various vendor platforms as to
exactly where a tape is positioned after reading a file on a multi-file
tape. These are difficult to reconcile due to compatibility
requirements with prior OS releases by each vendor.
Applications that use multi-file tapes, especially using them
for installation should consider using
dd
to actually extract
the information, and the undocumented
"-D"
option for
cpio
(discussed above) which
inhibits read ahead. This is the mechanism used by the SVR4 packaging
tools. Vendors have generally made
dd
properly position the tape
in a consistent way.
mount
and
unmount
commands specify how to mount and unmount file systems.
The specification below extends the definition in the
SVID 3
to support the mounting and unmounting of CD-ROM based file systems.
This definition is derived from the OCMP
and SVR4.2 specifications.
If FSType is cdfs, the special argument must be
/dev/abi/cd_iso.
Note that FSType and/or special can in some
circumstances be determined from /etc/vfstab.
The cdfs-specific options to
mount
include:
-r option are required.
nosusp flag prevents the processing of all SUSP-compliant extensions,
even if recorded on the media.
rrip flag requires that the susp flag also be set.
The norrip flag prevents the processing of all RRIP extensions
even if recorded on the media.
a
nmconv option lets you specify how
the file and directory names are seen by the user on the host system.
Non-ISO-9660 and non-High Sierra names are not converted.
a is some combination of the following:
Copyright © 1995, MIPS ABI Group, Incorporated.