home *** CD-ROM | disk | FTP | other *** search
- .\" Copyright (c) 1983 The Regents of the University of California.
- .\" 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 acknowledgement:
- .\" This product includes software developed by the University of
- .\" California, Berkeley and its contributors.
- .\" 4. Neither the name of the University nor the names of its contributors
- .\" may be used to endorse or promote products derived from this software
- .\" without specific prior written permission.
- .\"
- .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
- .\"
- .\" @(#)a.t 6.3 (Berkeley) 4/17/91
- .\"
- .\".ds RH "Configuration File Grammar
- .bp
- .LG
- .B
- .ce
- APPENDIX A. CONFIGURATION FILE GRAMMAR
- .sp
- .R
- .NL
- .PP
- The following grammar is a compressed form of the actual
- \fIyacc\fP\|(1) grammar used by
- .I config
- to parse configuration files.
- Terminal symbols are shown all in upper case, literals
- are emboldened; optional clauses are enclosed in brackets, ``[''
- and ``]''; zero or more instantiations are denoted with ``*''.
- .sp
- .nf
- .DT
- Configuration ::= [ Spec \fB;\fP ]*
-
- Spec ::= Config_spec
- | Device_spec
- | \fBtrace\fP
- | /* lambda */
-
- /* configuration specifications */
-
- Config_spec ::= \fBmachine\fP ID
- | \fBcpu\fP ID
- | \fBoptions\fP Opt_list
- | \fBident\fP ID
- | System_spec
- | \fBtimezone\fP [ \fB\-\fP ] NUMBER [ \fBdst\fP [ NUMBER ] ]
- | \fBtimezone\fP [ \fB\-\fP ] FPNUMBER [ \fBdst\fP [ NUMBER ] ]
- | \fBmaxusers\fP NUMBER
-
- /* system configuration specifications */
-
- System_spec ::= \fBconfig\fP ID System_parameter [ System_parameter ]*
-
- System_parameter ::= swap_spec | root_spec | dump_spec | arg_spec
-
- swap_spec ::= \fBswap\fP [ \fBon\fP ] swap_dev [ \fBand\fP swap_dev ]*
-
- swap_dev ::= dev_spec [ \fBsize\fP NUMBER ]
-
- root_spec ::= \fBroot\fP [ \fBon\fP ] dev_spec
-
- dump_spec ::= \fBdumps\fP [ \fBon\fP ] dev_spec
-
- arg_spec ::= \fBargs\fP [ \fBon\fP ] dev_spec
-
- dev_spec ::= dev_name | major_minor
-
- major_minor ::= \fBmajor\fP NUMBER \fBminor\fP NUMBER
-
- dev_name ::= ID [ NUMBER [ ID ] ]
-
- /* option specifications */
-
- Opt_list ::= Option [ \fB,\fP Option ]*
-
- Option ::= ID [ \fB=\fP Opt_value ]
-
- Opt_value ::= ID | NUMBER
-
- Mkopt_list ::= Mkoption [ \fB,\fP Mkoption ]*
-
- Mkoption ::= ID \fB=\fP Opt_value
-
- /* device specifications */
-
- Device_spec ::= \fBdevice\fP Dev_name Dev_info Int_spec
- | \fBmaster\fP Dev_name Dev_info
- | \fBdisk\fP Dev_name Dev_info
- | \fBtape\fP Dev_name Dev_info
- | \fBcontroller\fP Dev_name Dev_info [ Int_spec ]
- | \fBpseudo-device\fP Dev [ NUMBER ]
-
- Dev_name ::= Dev NUMBER
-
- Dev ::= \fBuba\fP | \fBmba\fP | ID
-
- Dev_info ::= Con_info [ Info ]*
-
- Con_info ::= \fBat\fP Dev NUMBER
- | \fBat\fP \fBnexus\fP NUMBER
-
- Info ::= \fBcsr\fP NUMBER
- | \fBdrive\fP NUMBER
- | \fBslave\fP NUMBER
- | \fBflags\fP NUMBER
-
- Int_spec ::= \fBvector\fP ID [ ID ]*
- | \fBpriority\fP NUMBER
- .fi
- .sp
- .SH
- Lexical Conventions
- .LP
- The terminal symbols are loosely defined as:
- .IP ID
- .br
- One or more alphabetics, either upper or lower case, and underscore,
- ``_''.
- .IP NUMBER
- .br
- Approximately the C language specification for an integer number.
- That is, a leading ``0x'' indicates a hexadecimal value,
- a leading ``0'' indicates an octal value, otherwise the number is
- expected to be a decimal value. Hexadecimal numbers may use either
- upper or lower case alphabetics.
- .IP FPNUMBER
- .br
- A floating point number without exponent. That is a number of the
- form ``nnn.ddd'', where the fractional component is optional.
- .LP
- In special instances a question mark, ``?'', can be substituted for
- a ``NUMBER'' token. This is used to effect wildcarding in device
- interconnection specifications.
- .LP
- Comments in configuration files are indicated by a ``#'' character
- at the beginning of the line; the remainder of the line is discarded.
- .LP
- A specification
- is interpreted as a continuation of the previous line
- if the first character of the line is tab.
-