MPE/iX Shell and Utilities Reference Manual, Vol 2

tar(1) MPE/iX Shell and Utilities tar(1)

Message: "z" (compress) option unavailable with "option"

Cause: You cannot use the compression option (z) with the update (u) or replace (r)

options.

Action: Do not use compression on archives that you plan on updating.

tar may also produce several of the error messages listed on the pax(1) man page. See that

man page for more details.

PORTABILITY

4.2 BSD UNIX.

The –U option is an extension to provide POSIX USTAR format compatibility. The –p option is

an common extension on BSD UNIX systems which is not available on UNIX System V systems.

MPE/iX NOTES

The current MPE/iX implementation of tar has the following limitations:

• It converts non-byte stream ﬁles to byte stream ﬁles before archiving them. File charac-

teristics like ﬁle code, record size, and so forth are not preserved by this conversion.

When you extract ﬁles from the archive, they are written as byte stream ﬁles.

• This release of MPE/iX does not provide the lstat() API. As a result, this command

cannot return information on the link itself. It attempts to determine when a symbolic link

has been referenced, but can only return the information on the target of the link, rather

than the link itself.

It displays ﬁle owner names as 17 character ﬁelds in the form username.accountname and

group names as 8 character ﬁelds in the form groupname.

For more information on how the current

MPE/iX implementation may affect the operation of

this utility, see Appendix A, MPE/iX Implementation Considerations.