rcorder -- print a dependency ordering of interdependent files
rcorder [-k keep] [-s skip] file ...
The rcorder utility is designed to print out a dependency ordering of a
set of interdependent files. Typically it is used to find an execution
sequence for a set of shell scripts in which certain files must be executed
before others.
Each file passed to rcorder must be annotated with special lines (which
look like comments to the shell) which indicate the dependencies the
files have upon certain points in the sequence, known as ``conditions'',
and which indicate, for each file, which ``conditions'' may be expected
to be filled by that file.
Within each file, a block containing a series of ``REQUIRE'',
``PROVIDE'', ``BEFORE'' and ``KEYWORD'' lines must appear. The format of
the lines is rigid. Each line must begin with a single `#', followed by
a single space, followed by ``PROVIDE:'', ``REQUIRE:'', ``BEFORE:'', or
``KEYWORD:''. No deviation is permitted. Each dependency line is then
followed by a series of conditions, separated by whitespace. Multiple
``PROVIDE'', ``REQUIRE'', ``BEFORE'' and ``KEYWORD'' lines may appear,
but all such lines must appear in a sequence without any intervening
lines, as once a line that does not follow the format is reached, parsing
stops.
The options are as follows:
-k Add the specified keyword to the ``keep list''. If any -k option
is given, only those files containing the matching keyword are
listed.
-s Add the specified keyword to the ``skip list''. If any -s option
is given, files containing the matching keyword are not listed.
An example block follows:
# REQUIRE: networking syslog
# REQUIRE: usr
# PROVIDE: dns nscd
This block states that the file in which it appears depends upon the
``networking'', ``syslog'', and ``usr'' conditions, and provides the
``dns'' and ``nscd'' conditions.
A file may contain zero ``PROVIDE'' lines, in which case it provides no
conditions, and may contain zero ``REQUIRE'' lines, in which case it has
no dependencies. There must be at least one file with no dependencies in
the set of arguments passed to rcorder in order for it to find a starting
place in the dependency ordering.
The rcorder utility may print one of the following error messages and
exit with a non-zero status if it encounters an error while processing
the file list.
Requirement %s has no providers, aborting. No file has a ``PROVIDE''
line corresponding to a condition present in a ``REQUIRE'' line in
another file.
Circular dependency on provision %s, aborting. A set of files has a circular
dependency which was detected while processing the stated condition.
Circular dependency on file %s, aborting. A set of files has a circular
dependency which was detected while processing the stated file.
rc(8)
The rcorder utility first appeared in NetBSD 1.5.
Written by Perry E. Metzger <[email protected]> and Matthew R. Green
<[email protected]>.
FreeBSD 5.2.1 July 17, 2000 FreeBSD 5.2.1 [ Back ] |
