config.y revision 169647 
1%union {
2	char	*str;
3	int	val;
4	struct	file_list *file;
5}
6
7%token	ARCH
8%token	COMMA
9%token	CONFIG
10%token	CPU
11%token	NOCPU
12%token	DEVICE
13%token	NODEVICE
14%token	ENV
15%token	EQUALS
16%token	HINTS
17%token	IDENT
18%token	MAXUSERS
19%token	PROFILE
20%token	OPTIONS
21%token	NOOPTION
22%token	MAKEOPTIONS
23%token	NOMAKEOPTION
24%token	SEMICOLON
25%token	INCLUDE
26%token	FILES
27
28%token	<str>	ID
29%token	<val>	NUMBER
30
31%type	<str>	Save_id
32%type	<str>	Opt_value
33%type	<str>	Dev
34
35%{
36
37/*
38 * Copyright (c) 1988, 1993
39 *	The Regents of the University of California.  All rights reserved.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 *    notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 *    notice, this list of conditions and the following disclaimer in the
48 *    documentation and/or other materials provided with the distribution.
49 * 3. All advertising materials mentioning features or use of this software
50 *    must display the following acknowledgement:
51 *	This product includes software developed by the University of
52 *	California, Berkeley and its contributors.
53 * 4. Neither the name of the University nor the names of its contributors
54 *    may be used to endorse or promote products derived from this software
55 *    without specific prior written permission.
56 *
57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
60 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 * SUCH DAMAGE.
68 *
69 *	@(#)config.y	8.1 (Berkeley) 6/6/93
70 * $FreeBSD: head/usr.sbin/config/config.y 169647 2007-05-17 04:53:52Z imp $
71 */
72
73#include <assert.h>
74#include <ctype.h>
75#include <err.h>
76#include <stdio.h>
77#include <string.h>
78
79#include "config.h"
80
81struct	device_head dtab;
82char	*ident;
83char	*env;
84int	envmode;
85int	hintmode;
86int	yyline;
87const	char *yyfile;
88struct  file_list_head ftab;
89struct  files_name_head fntab;
90char	errbuf[80];
91int	maxusers;
92
93#define ns(s)	strdup(s)
94int include(const char *, int);
95void yyerror(const char *s);
96int yywrap(void);
97
98static char *
99devopt(char *dev)
100{
101	char *ret = malloc(strlen(dev) + 5);
102
103	sprintf(ret, "DEV_%s", dev);
104	raisestr(ret);
105	return ret;
106}
107
108%}
109%%
110Configuration:
111	Many_specs
112		;
113
114Many_specs:
115	Many_specs Spec
116		|
117	/* lambda */
118		;
119
120Spec:
121	Device_spec SEMICOLON
122		|
123	Config_spec SEMICOLON
124		|
125	INCLUDE ID SEMICOLON
126	      = {
127	          if (incignore == 0)
128		  	include($2, 0);
129		};
130		|
131	FILES ID SEMICOLON
132	      = { newfile($2); };
133	        |
134	SEMICOLON
135		|
136	error SEMICOLON
137		;
138
139Config_spec:
140	ARCH Save_id
141	    = {
142		if (machinename != NULL && !eq($2, machinename))
143		    errx(1, "%s:%d: only one machine directive is allowed",
144			yyfile, yyline);
145		machinename = $2;
146		machinearch = $2;
147	      } |
148	ARCH Save_id Save_id
149	    = {
150		if (machinename != NULL &&
151		    !(eq($2, machinename) && eq($3, machinearch)))
152		    errx(1, "%s:%d: only one machine directive is allowed",
153			yyfile, yyline);
154		machinename = $2;
155		machinearch = $3;
156	      } |
157	CPU Save_id
158	      = {
159		struct cputype *cp =
160		    (struct cputype *)calloc(1, sizeof (struct cputype));
161		cp->cpu_name = $2;
162		SLIST_INSERT_HEAD(&cputype, cp, cpu_next);
163	      } |
164	NOCPU Save_id
165	      = {
166		struct cputype *cp, *cp2;
167		SLIST_FOREACH_SAFE(cp, &cputype, cpu_next, cp2) {
168			if (eq(cp->cpu_name, $2)) {
169				SLIST_REMOVE(&cputype, cp, cputype, cpu_next);
170				free(cp);
171			}
172		}
173	      } |
174	OPTIONS Opt_list
175		|
176	NOOPTION Save_id
177	      = { rmopt_schedule(&opt, $2); } |
178	MAKEOPTIONS Mkopt_list
179		|
180	NOMAKEOPTION Save_id
181	      = { rmopt_schedule(&mkopt, $2); } |
182	IDENT ID
183	      = { ident = $2; } |
184	System_spec
185		|
186	MAXUSERS NUMBER
187	      = { maxusers = $2; } |
188	PROFILE NUMBER
189	      = { profiling = $2; } |
190	ENV ID
191	      = {
192		env = $2;
193		envmode = 1;
194		} |
195	HINTS ID
196	      = {
197		struct hint *hint;
198
199		hint = (struct hint *)calloc(1, sizeof (struct hint));
200		hint->hint_name = $2;
201		STAILQ_INSERT_TAIL(&hints, hint, hint_next);
202		hintmode = 1;
203	        }
204
205System_spec:
206	CONFIG System_id System_parameter_list
207	  = { errx(1, "%s:%d: root/dump/swap specifications obsolete",
208	      yyfile, yyline);}
209	  |
210	CONFIG System_id
211	  ;
212
213System_id:
214	Save_id
215	      = { newopt(&mkopt, ns("KERNEL"), $1); };
216
217System_parameter_list:
218	  System_parameter_list ID
219	| ID
220	;
221
222Opt_list:
223	Opt_list COMMA Option
224		|
225	Option
226		;
227
228Option:
229	Save_id
230	      = {
231		newopt(&opt, $1, NULL);
232		if (strchr($1, '=') != NULL)
233			errx(1, "%s:%d: The `=' in options should not be "
234			    "quoted", yyfile, yyline);
235	      } |
236	Save_id EQUALS Opt_value
237	      = {
238		newopt(&opt, $1, $3);
239	      } ;
240
241Opt_value:
242	ID
243		= { $$ = $1; } |
244	NUMBER
245		= {
246			char buf[80];
247
248			(void) snprintf(buf, sizeof(buf), "%d", $1);
249			$$ = ns(buf);
250		} ;
251
252Save_id:
253	ID
254	      = { $$ = $1; }
255	;
256
257Mkopt_list:
258	Mkopt_list COMMA Mkoption
259		|
260	Mkoption
261		;
262
263Mkoption:
264	Save_id
265	      = { newopt(&mkopt, $1, ns("")); } |
266	Save_id EQUALS Opt_value
267	      = { newopt(&mkopt, $1, $3); } ;
268
269Dev:
270	ID
271	      = { $$ = $1; }
272	;
273
274Device_spec:
275	DEVICE Dev_list
276		|
277	NODEVICE NoDev_list
278		;
279
280Dev_list:
281	Dev_list COMMA Device
282		|
283	Device
284		;
285
286NoDev_list:
287	NoDev_list COMMA NoDevice
288		|
289	NoDevice
290		;
291
292Device:
293	Dev
294	      = {
295		newopt(&opt, devopt($1), ns("1"));
296		/* and the device part */
297		newdev($1);
298		}
299
300NoDevice:
301	Dev
302	      = {
303		char *s = devopt($1);
304
305		rmopt_schedule(&opt, s);
306		free(s);
307		/* and the device part */
308		rmdev_schedule(&dtab, $1);
309		} ;
310
311%%
312
313void
314yyerror(const char *s)
315{
316
317	errx(1, "%s:%d: %s", yyfile, yyline + 1, s);
318}
319
320int
321yywrap(void)
322{
323	if (found_defaults) {
324		if (freopen(PREFIX, "r", stdin) == NULL)
325			err(2, "%s", PREFIX);
326		yyfile = PREFIX;
327		yyline = 0;
328		found_defaults = 0;
329		return 0;
330	}
331	return 1;
332}
333
334/*
335 * Add a new file to the list of files.
336 */
337static void
338newfile(char *name)
339{
340	struct files_name *nl;
341
342	nl = (struct files_name *) calloc(1, sizeof *nl);
343	nl->f_name = name;
344	STAILQ_INSERT_TAIL(&fntab, nl, f_next);
345}
346
347/*
348 * Find a device in the list of devices.
349 */
350static struct device *
351finddev(struct device_head *dlist, char *name)
352{
353	struct device *dp;
354
355	STAILQ_FOREACH(dp, dlist, d_next)
356		if (eq(dp->d_name, name))
357			return (dp);
358
359	return (NULL);
360}
361
362/*
363 * Add a device to the list of devices.
364 */
365static void
366newdev(char *name)
367{
368	struct device *np;
369
370	if (finddev(&dtab, name)) {
371		printf("WARNING: duplicate device `%s' encountered.\n", name);
372		return;
373	}
374
375	np = (struct device *) calloc(1, sizeof *np);
376	np->d_name = name;
377	STAILQ_INSERT_TAIL(&dtab, np, d_next);
378}
379
380/*
381 * Schedule a device to removal.
382 */
383static void
384rmdev_schedule(struct device_head *dh, char *name)
385{
386	struct device *dp;
387
388	dp = finddev(dh, name);
389	if (dp != NULL) {
390		STAILQ_REMOVE(dh, dp, device, d_next);
391		free(dp->d_name);
392		free(dp);
393	}
394}
395
396/*
397 * Find an option in the list of options.
398 */
399static struct opt *
400findopt(struct opt_head *list, char *name)
401{
402	struct opt *op;
403
404	SLIST_FOREACH(op, list, op_next)
405		if (eq(op->op_name, name))
406			return (op);
407
408	return (NULL);
409}
410
411/*
412 * Add an option to the list of options.
413 */
414static void
415newopt(struct opt_head *list, char *name, char *value)
416{
417	struct opt *op;
418
419	/*
420	 * Ignore inclusions listed explicitly for configuration files.
421	 */
422	if (eq(name, OPT_AUTOGEN)) {
423		incignore = 1;
424		return;
425	}
426
427	if (findopt(list, name)) {
428		printf("WARNING: duplicate option `%s' encountered.\n", name);
429		return;
430	}
431
432	op = (struct opt *)calloc(1, sizeof (struct opt));
433	op->op_name = name;
434	op->op_ownfile = 0;
435	op->op_value = value;
436	SLIST_INSERT_HEAD(list, op, op_next);
437}
438
439/*
440 * Remove an option from the list of options.
441 */
442static void
443rmopt_schedule(struct opt_head *list, char *name)
444{
445	struct opt *op;
446
447	op = findopt(list, name);
448	if (op != NULL) {
449		SLIST_REMOVE(list, op, opt, op_next);
450		free(op->op_name);
451		free(op);
452	}
453}
454