Intel XENIX 286 Programmers Guide (86) - Tenox.tc

SCCS: Source Code Control System XENIX Programming
Assigning Values to Keywords
The values of most keywords are predefined by the system, but some, such as the value
for the 96M96 keyword, can be explicitly defined by the user. To assign a value to a
keyword, you must set the corresponding s-file flag to the desired value. You can do
this by using the -f option of the admin command.
For example, to set the 96M96 keyword to "cdemo", set the m flag as in the command
admin -fmcdemo s.demo.c
This command records "cdemo" as the current value of the 96M96 keyword. Note that if
you do not set the m flag, SCCS uses the name of the original text file for 96M96 by
default.
The t and q flags are also associated with keywords. A description of these flags and
the corresponding keywords can be found in the entry get in Appendix B, "Programming
Commands." You can change keyword values at any time.
Forcing Keywords
You can force a fatal error if a version is found to contain no keywords by setting the i
flag in the given s-file. The flag causes the delta and admin commands to stop
processing of the given version and report an error if no keywords are found. The flag is
useful for ensuring that keywords are used properly in a given file.
To set the i flag, you must use the -f option of the admin command. For example, the
command
admin -fi s.demo.c
sets the i flag in the s-file s.demo.c. Subsequent delta or admin commands that access
this file print an error message if the given version does not contain keywords.
Note that if you attempt to set the i flag at the same time you create an s-file and if
the initial text file contains no keywords, the admin command displays a fatal error
message and stops without creating the s-file.
Using s-file Flags
An s-file flag is a special value that defines how SCCS will operate on the corresponding
s-file. The s-file flags are stored in the s-file and are read by each SCCS command
before it operates on the file. The s-file flags affect keyword checking, keyword
replacement values, and default values for commands.
This section explains how to set and use s-file flags. It also describes the action of
commonly used flags. For a complete description of all flags, see the entry admin in
Appendix B, "Programming Commands."
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