1 .\" $NetBSD: rcorder.8,v 1.3 2000/07/17 14:16:22 mrg Exp $
2 .\" $DragonFly: src/sbin/rcorder/rcorder.8,v 1.1 2003/07/24 06:35:38 dillon Exp $
5 .\" Perry E. Metzger. All rights reserved.
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8 .\" modification, are permitted provided that the following conditions
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18 .\" by Perry E. Metzger.
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33 .\" $FreeBSD: src/sbin/rcorder/rcorder.8,v 1.3 2002/11/25 16:23:03 ru Exp $
40 .Nd print a dependency ordering of interdependent files
49 utility is designed to print out a dependency ordering of a set of
51 Typically it is used to find an execution
52 sequence for a set of shell scripts in which certain files must be
53 executed before others.
57 must be annotated with special lines (which look like comments to the
58 shell) which indicate the dependencies the files have upon certain
59 points in the sequence, known as
61 and which indicate, for each file, which
63 may be expected to be filled by that file.
65 Within each file, a block containing a series of
72 The format of the lines is rigid.
73 Each line must begin with a single
75 followed by a single space, followed by
81 No deviation is permitted.
82 Each dependency line is then followed by a series of conditions,
83 separated by whitespace.
90 lines may appear, but all such lines must appear in a sequence without
91 any intervening lines, as once a line that does not follow the format
92 is reached, parsing stops.
94 The options are as follows:
95 .Bl -tag -width indent
97 Add the specified keyword to the
101 option is given, only those files containing the matching keyword are listed.
103 Add the specified keyword to the
107 option is given, files containing the matching keyword are not listed.
110 An example block follows:
111 .Bd -literal -offset indent
112 # REQUIRE: networking syslog
117 This block states that the file in which it appears depends upon the
122 conditions, and provides the
128 A file may contain zero
130 lines, in which case it provides no conditions, and may contain zero
132 lines, in which case it has no dependencies.
133 There must be at least one file with no dependencies in the set of
136 in order for it to find a starting place in the dependency ordering.
140 utility may print one of the following error messages and exit with a non-zero
141 status if it encounters an error while processing the file list.
143 .It "Requirement %s has no providers, aborting."
146 line corresponding to a condition present in a
148 line in another file.
149 .It "Circular dependency on provision %s, aborting."
150 A set of files has a circular dependency which was detected while
151 processing the stated condition.
152 .It "Circular dependency on file %s, aborting."
153 A set of files has a circular dependency which was detected while
154 processing the stated file.
161 utility first appeared in
166 .An Perry E. Metzger Aq perry@piermont.com
168 .An Matthew R. Green Aq mrg@eterna.com.au .