dd8f31f0c8
manual's Appendix D ("Old Features Supported but not Encouraged") in
the Seventh Edition Unix Programmer's Manual (January, 1979) by
retiring the " = {" method of of action specification in favor of a
plain "{". It is no longer necessary for this bootstrap program to
be compatible with 6th Edition systems. Some yaccs in the wild do not
support this old syntax any more, and compatibility with those systems
is more important these days (as there are easily 7 orders of magnitude
more of them than real v6 systems today).
Reviewed by: jhb@ and dds@ (the latter gave the reference).
437 lines
8.3 KiB
Plaintext
437 lines
8.3 KiB
Plaintext
%union {
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char *str;
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int val;
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struct file_list *file;
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}
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%token ARCH
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%token COMMA
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%token CONFIG
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%token CPU
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%token NOCPU
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%token DEVICE
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%token NODEVICE
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%token ENV
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%token EQUALS
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%token HINTS
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%token IDENT
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%token MAXUSERS
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%token PROFILE
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%token OPTIONS
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%token NOOPTION
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%token MAKEOPTIONS
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%token NOMAKEOPTION
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%token SEMICOLON
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%token INCLUDE
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%token FILES
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%token <str> ID
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%token <val> NUMBER
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%type <str> Save_id
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%type <str> Opt_value
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%type <str> Dev
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%{
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/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)config.y 8.1 (Berkeley) 6/6/93
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* $FreeBSD$
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*/
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#include <assert.h>
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include <string.h>
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#include "config.h"
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struct device_head dtab;
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char *ident;
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char *env;
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int envmode;
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int hintmode;
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int yyline;
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const char *yyfile;
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struct file_list_head ftab;
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struct files_name_head fntab;
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char errbuf[80];
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int maxusers;
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#define ns(s) strdup(s)
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int include(const char *, int);
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void yyerror(const char *s);
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int yywrap(void);
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static void newdev(char *name);
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static void newfile(char *name);
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static void rmdev_schedule(struct device_head *dh, char *name);
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static void newopt(struct opt_head *list, char *name, char *value);
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static void rmopt_schedule(struct opt_head *list, char *name);
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static char *
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devopt(char *dev)
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{
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char *ret = malloc(strlen(dev) + 5);
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sprintf(ret, "DEV_%s", dev);
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raisestr(ret);
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return ret;
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}
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%}
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%%
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Configuration:
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Many_specs
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;
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Many_specs:
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Many_specs Spec
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/* lambda */
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;
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Spec:
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Device_spec SEMICOLON
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Config_spec SEMICOLON
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INCLUDE ID SEMICOLON {
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if (incignore == 0)
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include($2, 0);
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};
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FILES ID SEMICOLON { newfile($2); };
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SEMICOLON
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error SEMICOLON
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;
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Config_spec:
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ARCH Save_id {
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if (machinename != NULL && !eq($2, machinename))
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errx(1, "%s:%d: only one machine directive is allowed",
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yyfile, yyline);
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machinename = $2;
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machinearch = $2;
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} |
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ARCH Save_id Save_id {
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if (machinename != NULL &&
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!(eq($2, machinename) && eq($3, machinearch)))
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errx(1, "%s:%d: only one machine directive is allowed",
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yyfile, yyline);
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machinename = $2;
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machinearch = $3;
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} |
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CPU Save_id {
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struct cputype *cp =
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(struct cputype *)calloc(1, sizeof (struct cputype));
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cp->cpu_name = $2;
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SLIST_INSERT_HEAD(&cputype, cp, cpu_next);
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} |
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NOCPU Save_id {
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struct cputype *cp, *cp2;
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SLIST_FOREACH_SAFE(cp, &cputype, cpu_next, cp2) {
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if (eq(cp->cpu_name, $2)) {
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SLIST_REMOVE(&cputype, cp, cputype, cpu_next);
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free(cp);
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}
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}
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} |
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OPTIONS Opt_list
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NOOPTION Save_id { rmopt_schedule(&opt, $2); } |
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MAKEOPTIONS Mkopt_list
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NOMAKEOPTION Save_id { rmopt_schedule(&mkopt, $2); } |
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IDENT ID { ident = $2; } |
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System_spec
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MAXUSERS NUMBER { maxusers = $2; } |
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PROFILE NUMBER { profiling = $2; } |
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ENV ID {
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env = $2;
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envmode = 1;
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} |
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HINTS ID {
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struct hint *hint;
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hint = (struct hint *)calloc(1, sizeof (struct hint));
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hint->hint_name = $2;
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STAILQ_INSERT_TAIL(&hints, hint, hint_next);
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hintmode = 1;
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}
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System_spec:
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CONFIG System_id System_parameter_list {
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errx(1, "%s:%d: root/dump/swap specifications obsolete",
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yyfile, yyline);
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}
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CONFIG System_id
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;
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System_id:
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Save_id { newopt(&mkopt, ns("KERNEL"), $1); };
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System_parameter_list:
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System_parameter_list ID
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| ID
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;
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Opt_list:
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Opt_list COMMA Option
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Option
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;
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Option:
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Save_id {
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newopt(&opt, $1, NULL);
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if (strchr($1, '=') != NULL)
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errx(1, "%s:%d: The `=' in options should not be "
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"quoted", yyfile, yyline);
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} |
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Save_id EQUALS Opt_value {
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newopt(&opt, $1, $3);
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} ;
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Opt_value:
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ID { $$ = $1; } |
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NUMBER {
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char buf[80];
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(void) snprintf(buf, sizeof(buf), "%d", $1);
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$$ = ns(buf);
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} ;
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Save_id:
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ID { $$ = $1; }
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;
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Mkopt_list:
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Mkopt_list COMMA Mkoption
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Mkoption
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;
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Mkoption:
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Save_id { newopt(&mkopt, $1, ns("")); } |
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Save_id EQUALS Opt_value { newopt(&mkopt, $1, $3); } ;
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Dev:
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ID { $$ = $1; }
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;
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Device_spec:
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DEVICE Dev_list
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NODEVICE NoDev_list
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;
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Dev_list:
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Dev_list COMMA Device
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Device
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;
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NoDev_list:
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NoDev_list COMMA NoDevice
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NoDevice
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;
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Device:
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Dev {
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newopt(&opt, devopt($1), ns("1"));
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/* and the device part */
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newdev($1);
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}
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NoDevice:
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Dev {
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char *s = devopt($1);
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rmopt_schedule(&opt, s);
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free(s);
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/* and the device part */
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rmdev_schedule(&dtab, $1);
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} ;
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%%
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void
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yyerror(const char *s)
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{
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errx(1, "%s:%d: %s", yyfile, yyline + 1, s);
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}
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int
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yywrap(void)
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{
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if (found_defaults) {
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if (freopen(PREFIX, "r", stdin) == NULL)
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err(2, "%s", PREFIX);
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yyfile = PREFIX;
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yyline = 0;
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found_defaults = 0;
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return 0;
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}
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return 1;
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}
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/*
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* Add a new file to the list of files.
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*/
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static void
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newfile(char *name)
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{
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struct files_name *nl;
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nl = (struct files_name *) calloc(1, sizeof *nl);
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nl->f_name = name;
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STAILQ_INSERT_TAIL(&fntab, nl, f_next);
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}
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/*
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* Find a device in the list of devices.
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*/
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static struct device *
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finddev(struct device_head *dlist, char *name)
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{
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struct device *dp;
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STAILQ_FOREACH(dp, dlist, d_next)
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if (eq(dp->d_name, name))
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return (dp);
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return (NULL);
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}
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/*
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* Add a device to the list of devices.
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*/
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static void
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newdev(char *name)
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{
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struct device *np;
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if (finddev(&dtab, name)) {
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printf("WARNING: duplicate device `%s' encountered.\n", name);
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return;
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}
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np = (struct device *) calloc(1, sizeof *np);
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np->d_name = name;
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STAILQ_INSERT_TAIL(&dtab, np, d_next);
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}
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/*
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* Schedule a device to removal.
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*/
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static void
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rmdev_schedule(struct device_head *dh, char *name)
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{
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struct device *dp;
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dp = finddev(dh, name);
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if (dp != NULL) {
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STAILQ_REMOVE(dh, dp, device, d_next);
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free(dp->d_name);
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free(dp);
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}
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}
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/*
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* Find an option in the list of options.
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*/
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static struct opt *
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findopt(struct opt_head *list, char *name)
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{
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struct opt *op;
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SLIST_FOREACH(op, list, op_next)
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if (eq(op->op_name, name))
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return (op);
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return (NULL);
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}
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/*
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* Add an option to the list of options.
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*/
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static void
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newopt(struct opt_head *list, char *name, char *value)
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{
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struct opt *op;
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/*
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* Ignore inclusions listed explicitly for configuration files.
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*/
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if (eq(name, OPT_AUTOGEN)) {
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incignore = 1;
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return;
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}
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if (findopt(list, name)) {
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printf("WARNING: duplicate option `%s' encountered.\n", name);
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return;
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}
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op = (struct opt *)calloc(1, sizeof (struct opt));
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op->op_name = name;
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op->op_ownfile = 0;
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op->op_value = value;
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SLIST_INSERT_HEAD(list, op, op_next);
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}
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/*
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* Remove an option from the list of options.
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*/
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static void
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rmopt_schedule(struct opt_head *list, char *name)
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{
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struct opt *op;
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op = findopt(list, name);
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if (op != NULL) {
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SLIST_REMOVE(list, op, opt, op_next);
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free(op->op_name);
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free(op);
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}
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}
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