config.y revision 342809 
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	ENVVAR
16%token	EQUALS
17%token	PLUSEQUALS
18%token	HINTS
19%token	IDENT
20%token	MAXUSERS
21%token	PROFILE
22%token	OPTIONS
23%token	NOOPTION
24%token	MAKEOPTIONS
25%token	NOMAKEOPTION
26%token	SEMICOLON
27%token	INCLUDE
28%token	FILES
29
30%token	<str>	ENVLINE
31%token	<str>	ID
32%token	<val>	NUMBER
33
34%type	<str>	Save_id
35%type	<str>	Opt_value
36%type	<str>	Dev
37%token	<str>	PATH
38
39%{
40
41/*
42 * Copyright (c) 1988, 1993
43 *	The Regents of the University of California.  All rights reserved.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 *    notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 *    notice, this list of conditions and the following disclaimer in the
52 *    documentation and/or other materials provided with the distribution.
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: stable/11/usr.sbin/config/config.y 342809 2019-01-06 02:17:18Z kevans $
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	yyline;
85const	char *yyfile;
86struct  file_list_head ftab;
87struct  files_name_head fntab;
88char	errbuf[80];
89int	maxusers;
90
91#define ns(s)	strdup(s)
92int include(const char *, int);
93void yyerror(const char *s);
94int yywrap(void);
95
96static void newdev(char *name);
97static void newfile(char *name);
98static void newenvvar(char *name, bool is_file);
99static void rmdev_schedule(struct device_head *dh, char *name);
100static void newopt(struct opt_head *list, char *name, char *value, int append, int dupe);
101static void rmopt_schedule(struct opt_head *list, char *name);
102
103static char *
104devopt(char *dev)
105{
106	char *ret = malloc(strlen(dev) + 5);
107
108	sprintf(ret, "DEV_%s", dev);
109	raisestr(ret);
110	return ret;
111}
112
113%}
114%%
115Configuration:
116	Many_specs
117		;
118
119Many_specs:
120	Many_specs Spec
121		|
122	/* lambda */
123		;
124
125Spec:
126	Device_spec SEMICOLON
127		|
128	Config_spec SEMICOLON
129		|
130	INCLUDE PATH SEMICOLON {
131		if (incignore == 0)
132			include($2, 0);
133		};
134		|
135	INCLUDE ID SEMICOLON {
136	          if (incignore == 0)
137		  	include($2, 0);
138		};
139		|
140	FILES ID SEMICOLON { newfile($2); };
141	        |
142	SEMICOLON
143		|
144	error SEMICOLON
145		;
146
147Config_spec:
148	ARCH Save_id {
149		if (machinename != NULL && !eq($2, machinename))
150		    errx(1, "%s:%d: only one machine directive is allowed",
151			yyfile, yyline);
152		machinename = $2;
153		machinearch = $2;
154	      } |
155	ARCH Save_id Save_id {
156		if (machinename != NULL &&
157		    !(eq($2, machinename) && eq($3, machinearch)))
158		    errx(1, "%s:%d: only one machine directive is allowed",
159			yyfile, yyline);
160		machinename = $2;
161		machinearch = $3;
162	      } |
163	CPU Save_id {
164		struct cputype *cp =
165		    (struct cputype *)calloc(1, sizeof (struct cputype));
166		if (cp == NULL)
167			err(EXIT_FAILURE, "calloc");
168		cp->cpu_name = $2;
169		SLIST_INSERT_HEAD(&cputype, cp, cpu_next);
170	      } |
171	NOCPU Save_id {
172		struct cputype *cp, *cp2;
173		SLIST_FOREACH_SAFE(cp, &cputype, cpu_next, cp2) {
174			if (eq(cp->cpu_name, $2)) {
175				SLIST_REMOVE(&cputype, cp, cputype, cpu_next);
176				free(cp);
177			}
178		}
179	      } |
180	OPTIONS Opt_list
181		|
182	NOOPTION NoOpt_list |
183	MAKEOPTIONS Mkopt_list
184		|
185	NOMAKEOPTION Save_id { rmopt_schedule(&mkopt, $2); } |
186	IDENT ID { ident = $2; } |
187	System_spec
188		|
189	MAXUSERS NUMBER { maxusers = $2; } |
190	PROFILE NUMBER { profiling = $2; } |
191	ENV ID { newenvvar($2, true); } |
192	ENVVAR ENVLINE { newenvvar($2, false); } |
193	HINTS ID {
194		struct hint *hint;
195
196		hint = (struct hint *)calloc(1, sizeof (struct hint));
197		if (hint == NULL)
198			err(EXIT_FAILURE, "calloc");
199		hint->hint_name = $2;
200		STAILQ_INSERT_HEAD(&hints, hint, hint_next);
201	        }
202
203System_spec:
204	CONFIG System_id System_parameter_list {
205		errx(1, "%s:%d: root/dump/swap specifications obsolete",
206		      yyfile, yyline);
207		}
208	  |
209	CONFIG System_id
210	  ;
211
212System_id:
213	Save_id { newopt(&mkopt, ns("KERNEL"), $1, 0, 0); };
214
215System_parameter_list:
216	  System_parameter_list ID
217	| ID
218	;
219
220Opt_list:
221	Opt_list COMMA Option
222		|
223	Option
224		;
225
226NoOpt_list:
227	NoOpt_list COMMA NoOption
228	  	|
229	NoOption
230		;
231Option:
232	Save_id {
233		newopt(&opt, $1, NULL, 0, 1);
234		if (strchr($1, '=') != NULL)
235			errx(1, "%s:%d: The `=' in options should not be "
236			    "quoted", yyfile, yyline);
237	      } |
238	Save_id EQUALS Opt_value {
239		newopt(&opt, $1, $3, 0, 1);
240	      } ;
241
242NoOption:
243	Save_id {
244		rmopt_schedule(&opt, $1);
245		};
246
247Opt_value:
248	ID { $$ = $1; } |
249	NUMBER {
250			char buf[80];
251
252			(void) snprintf(buf, sizeof(buf), "%d", $1);
253			$$ = ns(buf);
254		} ;
255
256Save_id:
257	ID { $$ = $1; }
258	;
259
260Mkopt_list:
261	Mkopt_list COMMA Mkoption
262		|
263	Mkoption
264		;
265
266Mkoption:
267	Save_id { newopt(&mkopt, $1, ns(""), 0, 0); } |
268	Save_id EQUALS { newopt(&mkopt, $1, ns(""), 0, 0); } |
269	Save_id EQUALS Opt_value { newopt(&mkopt, $1, $3, 0, 0); } |
270	Save_id PLUSEQUALS Opt_value { newopt(&mkopt, $1, $3, 1, 0); } ;
271
272Dev:
273	ID { $$ = $1; }
274	;
275
276Device_spec:
277	DEVICE Dev_list
278		|
279	NODEVICE NoDev_list
280		;
281
282Dev_list:
283	Dev_list COMMA Device
284		|
285	Device
286		;
287
288NoDev_list:
289	NoDev_list COMMA NoDevice
290		|
291	NoDevice
292		;
293
294Device:
295	Dev {
296		newopt(&opt, devopt($1), ns("1"), 0, 0);
297		/* and the device part */
298		newdev($1);
299		}
300
301NoDevice:
302	Dev {
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	if (nl == NULL)
344		err(EXIT_FAILURE, "calloc");
345	nl->f_name = name;
346	STAILQ_INSERT_TAIL(&fntab, nl, f_next);
347}
348
349static void
350newenvvar(char *name, bool is_file)
351{
352	struct envvar *envvar;
353
354	envvar = (struct envvar *)calloc(1, sizeof (struct envvar));
355	if (envvar == NULL)
356		err(EXIT_FAILURE, "calloc");
357	envvar->env_str = name;
358	envvar->env_is_file = is_file;
359	STAILQ_INSERT_HEAD(&envvars, envvar, envvar_next);
360}
361
362/*
363 * Find a device in the list of devices.
364 */
365static struct device *
366finddev(struct device_head *dlist, char *name)
367{
368	struct device *dp;
369
370	STAILQ_FOREACH(dp, dlist, d_next)
371		if (eq(dp->d_name, name))
372			return (dp);
373
374	return (NULL);
375}
376
377/*
378 * Add a device to the list of devices.
379 */
380static void
381newdev(char *name)
382{
383	struct device *np;
384
385	if (finddev(&dtab, name)) {
386		fprintf(stderr,
387		    "WARNING: duplicate device `%s' encountered.\n", name);
388		return;
389	}
390
391	np = (struct device *) calloc(1, sizeof *np);
392	if (np == NULL)
393		err(EXIT_FAILURE, "calloc");
394	np->d_name = name;
395	STAILQ_INSERT_TAIL(&dtab, np, d_next);
396}
397
398/*
399 * Schedule a device to removal.
400 */
401static void
402rmdev_schedule(struct device_head *dh, char *name)
403{
404	struct device *dp;
405
406	dp = finddev(dh, name);
407	if (dp != NULL) {
408		STAILQ_REMOVE(dh, dp, device, d_next);
409		free(dp->d_name);
410		free(dp);
411	}
412}
413
414/*
415 * Find an option in the list of options.
416 */
417static struct opt *
418findopt(struct opt_head *list, char *name)
419{
420	struct opt *op;
421
422	SLIST_FOREACH(op, list, op_next)
423		if (eq(op->op_name, name))
424			return (op);
425
426	return (NULL);
427}
428
429/*
430 * Add an option to the list of options.
431 */
432static void
433newopt(struct opt_head *list, char *name, char *value, int append, int dupe)
434{
435	struct opt *op, *op2;
436
437	/*
438	 * Ignore inclusions listed explicitly for configuration files.
439	 */
440	if (eq(name, OPT_AUTOGEN)) {
441		incignore = 1;
442		return;
443	}
444
445	op2 = findopt(list, name);
446	if (op2 != NULL && !append && !dupe) {
447		fprintf(stderr,
448		    "WARNING: duplicate option `%s' encountered.\n", name);
449		return;
450	}
451
452	op = (struct opt *)calloc(1, sizeof (struct opt));
453	if (op == NULL)
454		err(EXIT_FAILURE, "calloc");
455	op->op_name = name;
456	op->op_ownfile = 0;
457	op->op_value = value;
458	if (op2 != NULL) {
459		if (append) {
460			while (SLIST_NEXT(op2, op_append) != NULL)
461				op2 = SLIST_NEXT(op2, op_append);
462			SLIST_NEXT(op2, op_append) = op;
463		} else {
464			while (SLIST_NEXT(op2, op_next) != NULL)
465				op2 = SLIST_NEXT(op2, op_next);
466			SLIST_NEXT(op2, op_next) = op;
467		}
468	} else
469		SLIST_INSERT_HEAD(list, op, op_next);
470}
471
472/*
473 * Remove an option from the list of options.
474 */
475static void
476rmopt_schedule(struct opt_head *list, char *name)
477{
478	struct opt *op;
479
480	while ((op = findopt(list, name)) != NULL) {
481		SLIST_REMOVE(list, op, opt, op_next);
482		free(op->op_name);
483		free(op);
484	}
485}
486