MPE/iX Shell and Utilities Reference Manual, Vol 1

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

PORTABILITY

All UNIX systems.

The –F, –G, –g, –I, –K, –O, –q, and –Y options are extensions to traditional implementations

of co.

NOTE

The –d option accepts no date before 1970.

Some unusual date formats may not be recognized.

Links to the RCS and working ﬁles are not preserved.

MPE/iX NOTES

The current

MPE/iX implementation of co has the following limitations:

• Due to the fact that the comma (,) is not a valid character in

MPE/iX ﬁle names, the tradi-

tional ,v naming convention is not currently implemented. You must have a subdirec-

tory named RCS under your current directory or

RCS will not work properly.

• For compatibility with traditional MPE/iX security features, you can only rename a ﬁle in

MPE/iX group if you own the ﬁle or if you have SM capability. Because this command

attempts to rename ﬁles to which it may not have write access, this feature can interfere

with the command’s operation. For this reason,

RCS archives should not be placed in an

MPE/iX

group, but rather should be located elsewhere in the hierarchical ﬁle system where

the restriction does not apply. For example, the default

RCSPATH

places the archives in a

subdirectory named RCS in the current working directory.

For more information on how the current

MPE/iX implementation may affect the operation of

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