RCORDER(8) | System Manager's Manual | RCORDER(8) |
rcorder
— print a
dependency ordering of interdependent files
rcorder |
[-k keep]
[-s skip]
file ... |
rcorder
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
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 “#”, 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
-k
option is given, only those files containing
the matching keyword are listed.-s
-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. 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
arguments passed to rcorder
in order for it to find
a starting place in the dependency ordering.
rcorder
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.
The rcorder
program first appeared in
NetBSD 1.5.
Written by Perry E. Metzger <perry@piermont.com> and Matthew R. Green <mrg@eterna23.net>.
April 23, 2003 | NetBSD 10.99 |