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Revision 1.10, Tue Mar 18 18:20:39 2014 UTC (6 years, 2 months ago) by riastradh
Merge riastradh-drm2 to HEAD.
.\" $NetBSD: rcorder.8,v 1.10 2014/03/18 18:20:39 riastradh Exp $ .\" .\" Copyright (c) 1998 .\" Perry E. Metzger. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgment: .\" This product includes software developed for the NetBSD Project .\" by Perry E. Metzger. .\" 4. The name of the author may not be used to endorse or promote products .\" derived from this software without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" .\" .Dd April 23, 2003 .Dt RCORDER 8 .Os .Sh NAME .Nm rcorder .Nd print a dependency ordering of interdependent files .Sh SYNOPSIS .Nm .Op Fl k Ar keep .Op Fl s Ar skip .Ar .Sh DESCRIPTION .Nm 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. .Pp Each file passed to .Nm 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 .Dq conditions , and which indicate, for each file, which .Dq conditions may be expected to be filled by that file. .Pp Within each file, a block containing a series of .Dq REQUIRE , .Dq PROVIDE , .Dq BEFORE and .Dq KEYWORD lines should appear. The format of the lines is rigid. Each line must begin with a single .Dq # , followed by a single space, followed by .Dq PROVIDE: , .Dq REQUIRE: , .Dq BEFORE: , or .Dq KEYWORD: . No deviation is permitted. Each dependency line is then followed by a series of conditions, separated by whitespace. Multiple .Dq PROVIDE , .Dq REQUIRE , .Dq BEFORE and .Dq 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. .Pp The options are as follows: .Bl -tag -width Ds .It Fl k Add the specified keyword to the .Dq keep list . If any .Fl k option is given, only those files containing the matching keyword are listed. .It Fl s Add the specified keyword to the .Dq skip list . If any .Fl s option is given, files containing the matching keyword are not listed. .El .Pp An example block follows: .Bd -literal -offset indent # REQUIRE: networking syslog # REQUIRE: usr # PROVIDE: dns nscd .Ed .Pp This block states that the file in which it appears depends upon the .Dq networking , .Dq syslog , and .Dq usr conditions, and provides the .Dq dns and .Dq nscd conditions. .Pp A file may contain zero .Dq PROVIDE lines, in which case it provides no conditions, and may contain zero .Dq REQUIRE lines, in which case it has no dependencies. A file containing no .Dq PROVIDE , .Dq REQUIRE , or .Dq BEFORE lines may be output at an arbitrary position in the dependency ordering. .Pp There must be at least one file with no dependencies in the set of arguments passed to .Nm in order for it to find a starting place in the dependency ordering. .Sh DIAGNOSTICS .Nm 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. .Bl -diag .It "Requirement %s has no providers, aborting." No file has a .Dq PROVIDE line corresponding to a condition present in a .Dq REQUIRE line in another file. .It "Circular dependency on provision %s, aborting." A set of files has a circular dependency which was detected while processing the stated condition. .It "Circular dependency on file %s, aborting." A set of files has a circular dependency which was detected while processing the stated file. .El .Sh SEE ALSO .Xr rc 8 .Sh HISTORY The .Nm program first appeared in .Nx 1.5 . .Sh AUTHORS .An -nosplit Written by .An Perry E. Metzger Aq Mt email@example.com and .An Matthew R. Green Aq Mt firstname.lastname@example.org .