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RCORDER(8) NetBSD System Manager's Manual RCORDER(8)
NNAAMMEE
rrccoorrddeerr - print a dependency ordering of interdependent files
SSYYNNOOPPSSIISS
rrccoorrddeerr [--kk _k_e_e_p] [--ss _s_k_i_p] _f_i_l_e _._._.
DDEESSCCRRIIPPTTIIOONN
rrccoorrddeerr is designed to print out a dependency ordering of a set of inter-
dependent 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 rrccoorrddeerr should 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 should appear. The format
of the lines is rigid. Each line must begin with a single ``#'', fol-
lowed by a single space, followed by ``PROVIDE:'', ``REQUIRE:'',
``BEFORE:'', or ``KEYWORD:''. No deviation is permitted. Each depen-
dency 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 fol-
low the format is reached, parsing stops.
The options are as follows:
--kk Add the specified keyword to the ``keep list''. If any --kk option
is given, only those files containing the matching keyword are
listed.
--ss Add the specified keyword to the ``skip list''. If any --ss 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. A file containing no ``PROVIDE'', ``REQUIRE'', or
``BEFORE'' lines may be output at an arbitrary position in the dependency
ordering.
There must be at least one file with no dependencies in the set of argu-
ments passed to rrccoorrddeerr in order for it to find a starting place in the
dependency ordering.
DDIIAAGGNNOOSSTTIICCSS
rrccoorrddeerr 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.
RReeqquuiirreemmeenntt %%ss hhaass nnoo pprroovviiddeerrss,, aabboorrttiinngg.. No file has a ``PROVIDE''
line corresponding to a condition present in a ``REQUIRE'' line in
another file.
CCiirrccuullaarr ddeeppeennddeennccyy oonn pprroovviissiioonn %%ss,, aabboorrttiinngg.. A set of files has a cir-
cular dependency which was detected while processing the stated condi-
tion.
CCiirrccuullaarr ddeeppeennddeennccyy oonn ffiillee %%ss,, aabboorrttiinngg.. A set of files has a circular
dependency which was detected while processing the stated file.
SSEEEE AALLSSOO
rc(8)
HHIISSTTOORRYY
The rrccoorrddeerr program first appeared in NetBSD 1.5.
AAUUTTHHOORRSS
Written by Perry E. Metzger (perry@piermont.com) and Matthew R. Green
(mrg@eterna.com.au).
NetBSD 2.0_BETA April 23, 2003 NetBSD 2.0_BETA
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