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freebsd/usr.sbin/config.new/gram.y
1994-05-26 05:23:31 +00:00

393 lines
9.7 KiB
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%{
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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, Lawrence Berkeley Laboratories.
*
* 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.
*
* @(#)gram.y 8.1 (Berkeley) 6/6/93
*/
#include <sys/param.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "sem.h"
#define FORMAT(n) ((n) > -10 && (n) < 10 ? "%d" : "0x%x")
#define stop(s) error(s), exit(1)
int include __P((const char *, int));
void yyerror __P((const char *));
int yylex __P((void));
extern const char *lastfile;
static struct config conf; /* at most one active at a time */
/* the following is used to recover nvlist space after errors */
static struct nvlist *alloc[1000];
static int adepth;
#define new0(n,s,p,i) (alloc[adepth++] = newnv(n, s, p, i))
#define new_n(n) new0(n, NULL, NULL, 0)
#define new_ns(n, s) new0(n, s, NULL, 0)
#define new_si(s, i) new0(NULL, s, NULL, i)
#define new_nsi(n,s,i) new0(n, s, NULL, i)
#define new_np(n, p) new0(n, NULL, p, 0)
#define new_s(s) new0(NULL, s, NULL, 0)
#define new_p(p) new0(NULL, NULL, p, 0)
static void cleanup __P((void));
static void setmachine __P((const char *));
%}
%union {
struct attr *attr;
struct devbase *devb;
struct nvlist *list;
const char *str;
int val;
}
%token AND AT COMPILE_WITH CONFIG DEFINE DEVICE DUMPS ENDFILE
%token XFILE FLAGS INCLUDE XMACHINE MAJOR MAKEOPTIONS MAXUSERS MINOR
%token ON OPTIONS PSEUDO_DEVICE ROOT SWAP VECTOR
%token <val> FFLAG NUMBER
%token <str> PATHNAME WORD
%type <list> fopts
%type <val> fflgs
%type <str> rule
%type <attr> attr
%type <devb> devbase
%type <list> atlist interface_opt
%type <str> atname
%type <list> loclist_opt loclist locdef
%type <str> locdefault
%type <list> veclist_opt veclist
%type <list> attrs_opt attrs
%type <list> locators locator
%type <list> swapdev_list dev_spec
%type <str> device_instance
%type <str> attachment
%type <str> value
%type <val> major_minor signed_number npseudo
%type <val> flags_opt
%%
/*
* A configuration consists of a machine type, followed by the machine
* definition files (via the include() mechanism), followed by the
* configuration specification(s) proper. In effect, this is two
* separate grammars, with some shared terminals and nonterminals.
*/
Configuration:
hdrs machine_spec /* "machine foo" from machine descr. */
dev_defs dev_eof /* ../../conf/devices */
dev_defs dev_eof /* devices.foo */
specs; /* rest of machine description */
hdrs:
hdrs hdr |
/* empty */;
hdr:
include |
'\n';
machine_spec:
XMACHINE WORD = { setmachine($2); } |
error = { stop("cannot proceed without machine specifier"); };
dev_eof:
ENDFILE = { enddefs(lastfile); checkfiles(); };
/*
* Various nonterminals shared between the grammars.
*/
file:
XFILE PATHNAME fopts fflgs rule = { addfile($2, $3, $4, $5); };
/* order of options is important, must use right recursion */
fopts:
WORD fopts = { ($$ = new_n($1))->nv_next = $2; } |
/* empty */ = { $$ = NULL; };
fflgs:
fflgs FFLAG = { $$ = $1 | $2; } |
/* empty */ = { $$ = 0; };
rule:
COMPILE_WITH WORD = { $$ = $2; } |
/* empty */ = { $$ = NULL; };
include:
INCLUDE WORD = { (void)include($2, '\n'); };
/*
* The machine definitions grammar.
*/
dev_defs:
dev_defs dev_def |
/* empty */;
dev_def:
one_def '\n' = { adepth = 0; } |
'\n' |
error '\n' = { cleanup(); };
one_def:
file |
/* include | */
DEFINE WORD interface_opt = { (void)defattr($2, $3); } |
DEVICE devbase AT atlist veclist_opt interface_opt attrs_opt
= { defdev($2, 0, $4, $5, $6, $7); } |
MAXUSERS NUMBER NUMBER NUMBER = { setdefmaxusers($2, $3, $4); } |
PSEUDO_DEVICE devbase attrs_opt = { defdev($2,1,NULL,NULL,NULL,$3); } |
MAJOR '{' majorlist '}';
atlist:
atlist ',' atname = { ($$ = new_n($3))->nv_next = $1; } |
atname = { $$ = new_n($1); };
atname:
WORD = { $$ = $1; } |
ROOT = { $$ = NULL; };
veclist_opt:
VECTOR veclist = { $$ = $2; } |
/* empty */ = { $$ = NULL; };
/* veclist order matters, must use right recursion */
veclist:
WORD veclist = { ($$ = new_n($1))->nv_next = $2; } |
WORD = { $$ = new_n($1); };
devbase:
WORD = { $$ = getdevbase($1); };
interface_opt:
'{' loclist_opt '}' = { ($$ = new_n(""))->nv_next = $2; } |
/* empty */ = { $$ = NULL; };
loclist_opt:
loclist = { $$ = $1; } |
/* empty */ = { $$ = NULL; };
/* loclist order matters, must use right recursion */
loclist:
locdef ',' loclist = { ($$ = $1)->nv_next = $3; } |
locdef = { $$ = $1; };
/* "[ WORD locdefault ]" syntax may be unnecessary... */
locdef:
WORD locdefault = { $$ = new_nsi($1, $2, 0); } |
WORD = { $$ = new_nsi($1, NULL, 0); } |
'[' WORD locdefault ']' = { $$ = new_nsi($2, $3, 1); };
locdefault:
'=' value = { $$ = $2; };
value:
WORD = { $$ = $1; } |
signed_number = { char bf[40];
(void)sprintf(bf, FORMAT($1), $1);
$$ = intern(bf); };
signed_number:
NUMBER = { $$ = $1; } |
'-' NUMBER = { $$ = -$2; };
attrs_opt:
':' attrs = { $$ = $2; } |
/* empty */ = { $$ = NULL; };
attrs:
attrs ',' attr = { ($$ = new_p($3))->nv_next = $1; } |
attr = { $$ = new_p($1); };
attr:
WORD = { $$ = getattr($1); };
majorlist:
majorlist ',' majordef |
majordef;
majordef:
devbase '=' NUMBER = { setmajor($1, $3); };
/*
* The configuration grammar.
*/
specs:
specs spec |
/* empty */;
spec:
config_spec '\n' = { adepth = 0; } |
'\n' |
error '\n' = { cleanup(); };
config_spec:
file |
include |
OPTIONS opt_list |
MAKEOPTIONS mkopt_list |
MAXUSERS NUMBER = { setmaxusers($2); } |
CONFIG conf sysparam_list = { addconf(&conf); } |
PSEUDO_DEVICE WORD npseudo = { addpseudo($2, $3); } |
device_instance AT attachment locators flags_opt
= { adddev($1, $3, $4, $5); };
mkopt_list:
mkopt_list ',' mkoption |
mkoption;
mkoption:
WORD '=' value = { addmkoption($1, $3); }
opt_list:
opt_list ',' option |
option;
option:
WORD = { addoption($1, NULL); } |
WORD '=' value = { addoption($1, $3); };
conf:
WORD = { conf.cf_name = $1;
conf.cf_lineno = currentline();
conf.cf_root = NULL;
conf.cf_swap = NULL;
conf.cf_dump = NULL; };
sysparam_list:
sysparam_list sysparam |
sysparam;
sysparam:
ROOT on_opt dev_spec = { setconf(&conf.cf_root, "root", $3); } |
SWAP on_opt swapdev_list = { setconf(&conf.cf_swap, "swap", $3); } |
DUMPS on_opt dev_spec = { setconf(&conf.cf_dump, "dumps", $3); };
swapdev_list:
dev_spec AND swapdev_list = { ($$ = $1)->nv_next = $3; } |
dev_spec = { $$ = $1; };
dev_spec:
WORD = { $$ = new_si($1, NODEV); } |
major_minor = { $$ = new_si(NULL, $1); };
major_minor:
MAJOR NUMBER MINOR NUMBER = { $$ = makedev($2, $4); };
on_opt:
ON | /* empty */;
npseudo:
NUMBER = { $$ = $1; } |
/* empty */ = { $$ = 1; };
device_instance:
WORD '*' = { $$ = starref($1); } |
WORD = { $$ = $1; };
attachment:
ROOT = { $$ = NULL; } |
WORD '?' = { $$ = wildref($1); } |
WORD '*' = { $$ = starref($1); } |
WORD = { $$ = $1; };
locators:
locators locator = { ($$ = $2)->nv_next = $1; } |
/* empty */ = { $$ = NULL; };
locator:
WORD value = { $$ = new_ns($1, $2); } |
WORD '?' = { $$ = new_ns($1, NULL); };
flags_opt:
FLAGS NUMBER = { $$ = $2; } |
/* empty */ = { $$ = 0; };
%%
void
yyerror(s)
const char *s;
{
error("%s", s);
}
/*
* Cleanup procedure after syntax error: release any nvlists
* allocated during parsing the current line.
*/
static void
cleanup()
{
register struct nvlist **np;
register int i;
for (np = alloc, i = adepth; --i >= 0; np++)
nvfree(*np);
adepth = 0;
}
static void
setmachine(mch)
const char *mch;
{
char buf[MAXPATHLEN];
machine = mch;
(void)sprintf(buf, "files.%s", mch);
if (include(buf, ENDFILE) ||
include("../../conf/files.newconf", ENDFILE))
exit(1);
}