vc.1 (2010 09)

v
vc(1) vc(1)
NAME
vc - substitutes assigned values in place of identification keywords.
SYNOPSIS
vc [-a][-t][
-c char ][-s][keyword=value ... keyword=value ]
DESCRIPTION
The
vc,orversion control command copies lines from the standard input to the standard output under
control of command line arguments and control statements encountered in the standard input. In the
process of performing the copy operation, user declared keywords can be replaced by their string value
when they appear in plain text and/or control statements. The copying of lines from the standard input to
the standard output is conditional, based on tests of keyword values specified in control statements or on
vc command arguments.
Replacement of keywords by values is done whenever a keyword surrounded by control characters is
encountered on a version control statement. The
-a option forces replacement of keywords in all lines of
text. An uninterpreted control character can be included in a value by preceding it with
\. If a literal \
is desired, it too must be preceded by
\.
The
vc command is part of the SCCS (Source Code Control System) command suite.
Options
vc recognizes the following options and arguments:
-a Replace keywords surrounded by control characters with their assigned value in all text
lines and not just in vc statements.
-t Ignore all characters from the beginning of a line up to and including the first tab charac-
ter for the purpose of detecting a control statement. If one is found, all characters up to
and including the tab are discarded.
-cchar Specify a control character to be used in place of :.
-s Silence warning messages (not errors) that are normally printed on the diagnostic output.
Control Statements
A control statement is a single line beginning with a control character, and the default control character
is colon (
:) (Unless the -t and -c options are used [See above]). Input lines beginning with a
backslash (\) followed by the control character are not control lines, and are copied to the standard out-
put with the backslash removed. Lines beginning with a backslash followed by a non-control character
are copied in their entirety.
A keyword is composed of 9 or fewer alphanumeric characters of which the first character is alphabetic.
A value is any
ASCII string that can be created using ed (see ed(1)); a numeric value is an unsigned
string of digits. Keyword values must not contain spaces or tabs.
Version control statements occur in the following forms:
:dcl keyword[, ..., keyword]
Used to declare keywords. All keywords must be declared.
:asg keyword=value
Used to assign values to keywords. An
asg statement overrides the assignment
for the corresponding keyword on the vc command line and all previous asgs
for that keyword. Keywords declared, but not assigned values have null values.
:if condition
...
:end Used to skip lines of the standard input. If the condition is true, all lines
between the if statement and the matching end statement are copied to the stan-
dard output. If the condition is false, all intervening lines are discarded, includ-
ing control statements. Note that intervening if statements and matching end
statements are recognized solely for the purpose of maintaining the proper if-end
matching.
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1