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Annotation of 43BSDReno/share/doc/smm/02.config/a.t, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)a.t 6.2 (Berkeley) 6/3/86
        !             6: .\"
        !             7: .\".ds RH "Configuration File Grammar
        !             8: .bp
        !             9: .LG
        !            10: .B
        !            11: .ce
        !            12: APPENDIX A. CONFIGURATION FILE GRAMMAR
        !            13: .sp
        !            14: .R
        !            15: .NL
        !            16: .PP
        !            17: The following grammar is a compressed form of the actual
        !            18: \fIyacc\fP\|(1) grammar used by
        !            19: .I config
        !            20: to parse configuration files.
        !            21: Terminal symbols are shown all in upper case, literals
        !            22: are emboldened; optional clauses are enclosed in brackets, ``[''
        !            23: and ``]'';  zero or more instantiations are denoted with ``*''.
        !            24: .sp
        !            25: .nf
        !            26: .DT
        !            27: Configuration ::=  [ Spec \fB;\fP ]*
        !            28: 
        !            29: Spec ::= Config_spec
        !            30:        | Device_spec
        !            31:        | \fBtrace\fP
        !            32:        | /* lambda */
        !            33: 
        !            34: /* configuration specifications */
        !            35: 
        !            36: Config_spec ::=  \fBmachine\fP ID
        !            37:        | \fBcpu\fP ID
        !            38:        | \fBoptions\fP Opt_list
        !            39:        | \fBident\fP ID
        !            40:        | System_spec
        !            41:        | \fBtimezone\fP [ \fB\-\fP ] NUMBER [ \fBdst\fP [ NUMBER ] ]
        !            42:        | \fBtimezone\fP [ \fB\-\fP ] FPNUMBER [ \fBdst\fP [ NUMBER ] ]
        !            43:        | \fBmaxusers\fP NUMBER
        !            44: 
        !            45: /* system configuration specifications */
        !            46: 
        !            47: System_spec ::= \fBconfig\fP ID System_parameter [ System_parameter ]*
        !            48: 
        !            49: System_parameter ::=  swap_spec | root_spec | dump_spec | arg_spec
        !            50: 
        !            51: swap_spec ::=  \fBswap\fP [ \fBon\fP ] swap_dev [ \fBand\fP swap_dev ]*
        !            52: 
        !            53: swap_dev ::=  dev_spec [ \fBsize\fP NUMBER ]
        !            54: 
        !            55: root_spec ::=  \fBroot\fP [ \fBon\fP ] dev_spec
        !            56: 
        !            57: dump_spec ::=  \fBdumps\fP [ \fBon\fP ] dev_spec
        !            58: 
        !            59: arg_spec ::=  \fBargs\fP [ \fBon\fP ] dev_spec
        !            60: 
        !            61: dev_spec ::=  dev_name | major_minor
        !            62: 
        !            63: major_minor ::=  \fBmajor\fP NUMBER \fBminor\fP NUMBER
        !            64: 
        !            65: dev_name ::=  ID [ NUMBER [ ID ] ]
        !            66: 
        !            67: /* option specifications */
        !            68: 
        !            69: Opt_list ::=  Option [ \fB,\fP Option ]*
        !            70: 
        !            71: Option ::=  ID [ \fB=\fP Opt_value ]
        !            72: 
        !            73: Opt_value ::=  ID | NUMBER
        !            74: 
        !            75: Mkopt_list ::=  Mkoption [ \fB,\fP Mkoption ]*
        !            76: 
        !            77: Mkoption ::=  ID \fB=\fP Opt_value
        !            78: 
        !            79: /* device specifications */
        !            80: 
        !            81: Device_spec ::= \fBdevice\fP Dev_name Dev_info Int_spec
        !            82:        | \fBmaster\fP Dev_name Dev_info
        !            83:        | \fBdisk\fP Dev_name Dev_info
        !            84:        | \fBtape\fP Dev_name Dev_info
        !            85:        | \fBcontroller\fP Dev_name Dev_info [ Int_spec ]
        !            86:        | \fBpseudo-device\fP Dev [ NUMBER ]
        !            87: 
        !            88: Dev_name ::=  Dev NUMBER
        !            89: 
        !            90: Dev ::=  \fBuba\fP | \fBmba\fP | ID
        !            91: 
        !            92: Dev_info ::=  Con_info [ Info ]*
        !            93: 
        !            94: Con_info ::=  \fBat\fP Dev NUMBER
        !            95:        | \fBat\fP \fBnexus\fP NUMBER
        !            96: 
        !            97: Info ::=  \fBcsr\fP NUMBER
        !            98:        | \fBdrive\fP NUMBER
        !            99:        | \fBslave\fP NUMBER
        !           100:        | \fBflags\fP NUMBER
        !           101: 
        !           102: Int_spec ::=  \fBvector\fP ID [ ID ]*
        !           103:        | \fBpriority\fP NUMBER
        !           104: .fi
        !           105: .sp
        !           106: .SH
        !           107: Lexical Conventions
        !           108: .LP
        !           109: The terminal symbols are loosely defined as:
        !           110: .IP ID
        !           111: .br
        !           112: One or more alphabetics, either upper or lower case, and underscore,
        !           113: ``_''.
        !           114: .IP NUMBER
        !           115: .br
        !           116: Approximately the C language specification for an integer number.
        !           117: That is, a leading ``0x'' indicates a hexadecimal value,
        !           118: a leading ``0'' indicates an octal value, otherwise the number is
        !           119: expected to be a decimal value.  Hexadecimal numbers may use either
        !           120: upper or lower case alphabetics.
        !           121: .IP FPNUMBER
        !           122: .br
        !           123: A floating point number without exponent.  That is a number of the
        !           124: form ``nnn.ddd'', where the fractional component is optional.
        !           125: .LP
        !           126: In special instances a question mark, ``?'', can be substituted for
        !           127: a ``NUMBER'' token.  This is used to effect wildcarding in device
        !           128: interconnection specifications.
        !           129: .LP
        !           130: Comments in configuration files are indicated by a ``#'' character
        !           131: at the beginning of the line; the remainder of the line is discarded.
        !           132: .LP
        !           133: A specification
        !           134: is interpreted as a continuation of the previous line
        !           135: if the first character of the line is tab.

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