mkoptions.c revision 71866 
1/*
2 * Copyright (c) 1995  Peter Wemm
3 * Copyright (c) 1980, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by the University of
17 *	California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef lint
36#if 0
37static char sccsid[] = "@(#)mkheaders.c	8.1 (Berkeley) 6/6/93";
38#endif
39static const char rcsid[] =
40  "$FreeBSD: head/usr.sbin/config/mkoptions.c 71866 2001-01-31 08:42:35Z peter $";
41#endif /* not lint */
42
43/*
44 * Make all the .h files for the optional entries
45 */
46
47#include <ctype.h>
48#include <err.h>
49#include <stdio.h>
50#include <string.h>
51#include <sys/param.h>
52#include "config.h"
53#include "y.tab.h"
54
55static	struct users {
56	int	u_default;
57	int	u_min;
58	int	u_max;
59} users[] = {
60	{ 8, 2, 512 },			/* MACHINE_I386 */
61	{ 8, 2, 512 },			/* MACHINE_PC98 */
62	{ 8, 2, 512 },			/* MACHINE_ALPHA */
63	{ 8, 2, 512 },			/* MACHINE_IA64 */
64	{ 8, 2, 512 },			/* MACHINE_POWERPC */
65};
66#define	NUSERS	(sizeof (users) / sizeof (users[0]))
67
68static char *lower(char *);
69static void read_options(void);
70static void do_option(char *);
71static char *tooption(char *);
72
73void
74options(void)
75{
76	char buf[40];
77	struct cputype *cp;
78	struct opt_list *ol;
79	struct opt *op;
80	struct users *up;
81
82	/* Fake the cpu types as options. */
83	for (cp = cputype; cp != NULL; cp = cp->cpu_next) {
84		op = (struct opt *)malloc(sizeof(*op));
85		memset(op, 0, sizeof(*op));
86		op->op_name = ns(cp->cpu_name);
87		op->op_next = opt;
88		opt = op;
89	}
90
91	/* Initialize `maxusers'. */
92	if ((unsigned)machine > NUSERS) {
93		printf("maxusers config info isn't present, using i386\n");
94		up = &users[MACHINE_I386 - 1];
95	} else
96		up = &users[machine - 1];
97	if (maxusers == 0) {
98		printf("maxusers not specified; %d assumed\n", up->u_default);
99		maxusers = up->u_default;
100	} else if (maxusers < up->u_min) {
101		printf("minimum of %d maxusers assumed\n", up->u_min);
102		maxusers = up->u_min;
103	} else if (maxusers > up->u_max)
104		printf("warning: maxusers > %d (%d)\n", up->u_max, maxusers);
105
106	/* Fake MAXUSERS as an option. */
107	op = (struct opt *)malloc(sizeof(*op));
108	memset(op, 0, sizeof(*op));
109	op->op_name = "MAXUSERS";
110	snprintf(buf, sizeof(buf), "%d", maxusers);
111	op->op_value = ns(buf);
112	op->op_next = opt;
113	opt = op;
114
115	read_options();
116	for (ol = otab; ol != 0; ol = ol->o_next)
117		do_option(ol->o_name);
118	for (op = opt; op; op = op->op_next) {
119		if (!op->op_ownfile && strncmp(op->op_name, "DEV_", 4)) {
120			printf("%s:%d: unknown option \"%s\"\n",
121			       PREFIX, op->op_line, op->op_name);
122			exit(1);
123		}
124	}
125}
126
127/*
128 * Generate an <options>.h file
129 */
130
131static void
132do_option(char *name)
133{
134	char *basefile, *file, *inw;
135	struct opt_list *ol;
136	struct opt *op, *op_head, *topp;
137	FILE *inf, *outf;
138	char *value;
139	char *oldvalue;
140	int seen;
141	int tidy;
142
143	file = tooption(name);
144
145	/*
146	 * Check to see if the option was specified..
147	 */
148	value = NULL;
149	for (op = opt; op; op = op->op_next) {
150		if (eq(name, op->op_name)) {
151			oldvalue = value;
152			value = op->op_value;
153			if (value == NULL)
154				value = ns("1");
155			if (oldvalue != NULL && !eq(value, oldvalue))
156				printf(
157			    "%s:%d: option \"%s\" redefined from %s to %s\n",
158				   PREFIX, op->op_line, op->op_name, oldvalue,
159				   value);
160			op->op_ownfile++;
161		}
162	}
163
164	remember(file);
165	inf = fopen(file, "r");
166	if (inf == 0) {
167		outf = fopen(file, "w");
168		if (outf == 0)
169			err(1, "%s", file);
170
171		/* was the option in the config file? */
172		if (value) {
173			fprintf(outf, "#define %s %s\n", name, value);
174		} /* else empty file */
175
176		(void) fclose(outf);
177		return;
178	}
179	basefile = "";
180	for (ol = otab; ol != 0; ol = ol->o_next)
181		if (eq(name, ol->o_name)) {
182			basefile = ol->o_file;
183			break;
184		}
185	oldvalue = NULL;
186	op_head = NULL;
187	seen = 0;
188	tidy = 0;
189	for (;;) {
190		char *cp;
191		char *invalue;
192
193		/* get the #define */
194		if ((inw = get_word(inf)) == 0 || inw == (char *)EOF)
195			break;
196		/* get the option name */
197		if ((inw = get_word(inf)) == 0 || inw == (char *)EOF)
198			break;
199		inw = ns(inw);
200		/* get the option value */
201		if ((cp = get_word(inf)) == 0 || cp == (char *)EOF)
202			break;
203		/* option value */
204		invalue = ns(cp); /* malloced */
205		if (eq(inw, name)) {
206			oldvalue = invalue;
207			invalue = value;
208			seen++;
209		}
210		for (ol = otab; ol != 0; ol = ol->o_next)
211			if (eq(inw, ol->o_name))
212				break;
213		if (!eq(inw, name) && !ol) {
214			printf("WARNING: unknown option `%s' removed from %s\n",
215				inw, file);
216			tidy++;
217		} else if (ol != NULL && !eq(basefile, ol->o_file)) {
218			printf("WARNING: option `%s' moved from %s to %s\n",
219				inw, basefile, ol->o_file);
220			tidy++;
221		} else {
222			op = (struct opt *) malloc(sizeof *op);
223			bzero(op, sizeof(*op));
224			op->op_name = inw;
225			op->op_value = invalue;
226			op->op_next = op_head;
227			op_head = op;
228		}
229
230		/* EOL? */
231		cp = get_word(inf);
232		if (cp == (char *)EOF)
233			break;
234	}
235	(void) fclose(inf);
236	if (!tidy && ((value == NULL && oldvalue == NULL) ||
237	    (value && oldvalue && eq(value, oldvalue)))) {
238		for (op = op_head; op != NULL; op = topp) {
239			topp = op->op_next;
240			free(op->op_name);
241			free(op->op_value);
242			free(op);
243		}
244		return;
245	}
246
247	if (value && !seen) {
248		/* New option appears */
249		op = (struct opt *) malloc(sizeof *op);
250		bzero(op, sizeof(*op));
251		op->op_name = ns(name);
252		op->op_value = value ? ns(value) : NULL;
253		op->op_next = op_head;
254		op_head = op;
255	}
256
257	outf = fopen(file, "w");
258	if (outf == 0)
259		err(1, "%s", file);
260	for (op = op_head; op != NULL; op = topp) {
261		/* was the option in the config file? */
262		if (op->op_value) {
263			fprintf(outf, "#define %s %s\n",
264				op->op_name, op->op_value);
265		}
266		topp = op->op_next;
267		free(op->op_name);
268		free(op->op_value);
269		free(op);
270	}
271	(void) fclose(outf);
272}
273
274/*
275 * Find the filename to store the option spec into.
276 */
277static char *
278tooption(char *name)
279{
280	static char hbuf[MAXPATHLEN];
281	char nbuf[MAXPATHLEN];
282	struct opt_list *po;
283
284	/* "cannot happen"?  the otab list should be complete.. */
285	(void) strlcpy(nbuf, "options.h", sizeof(nbuf));
286
287	for (po = otab ; po != 0; po = po->o_next) {
288		if (eq(po->o_name, name)) {
289			strlcpy(nbuf, po->o_file, sizeof(nbuf));
290			break;
291		}
292	}
293
294	(void) strlcpy(hbuf, path(nbuf), sizeof(hbuf));
295	return (hbuf);
296}
297
298/*
299 * read the options and options.<machine> files
300 */
301static void
302read_options(void)
303{
304	FILE *fp;
305	char fname[MAXPATHLEN];
306	char *wd, *this, *val;
307	struct opt_list *po;
308	int first = 1;
309	char genopt[MAXPATHLEN];
310
311	otab = 0;
312	if (ident == NULL) {
313		printf("no ident line specified\n");
314		exit(1);
315	}
316	(void) snprintf(fname, sizeof(fname), "../../conf/options");
317openit:
318	fp = fopen(fname, "r");
319	if (fp == 0) {
320		return;
321	}
322next:
323	wd = get_word(fp);
324	if (wd == (char *)EOF) {
325		(void) fclose(fp);
326		if (first == 1) {
327			first++;
328			(void) snprintf(fname, sizeof fname, "../../conf/options.%s", machinename);
329			fp = fopen(fname, "r");
330			if (fp != 0)
331				goto next;
332			(void) snprintf(fname, sizeof fname, "options.%s", machinename);
333			goto openit;
334		}
335		if (first == 2) {
336			first++;
337			(void) snprintf(fname, sizeof fname, "options.%s", raisestr(ident));
338			fp = fopen(fname, "r");
339			if (fp != 0)
340				goto next;
341		}
342		return;
343	}
344	if (wd == 0)
345		goto next;
346	if (wd[0] == '#')
347	{
348		while (((wd = get_word(fp)) != (char *)EOF) && wd)
349		;
350		goto next;
351	}
352	this = ns(wd);
353	val = get_word(fp);
354	if (val == (char *)EOF)
355		return;
356	if (val == 0) {
357		char *s = ns(this);
358		(void) snprintf(genopt, sizeof(genopt), "opt_%s.h", lower(s));
359		val = genopt;
360		free(s);
361	}
362	val = ns(val);
363
364	for (po = otab ; po != 0; po = po->o_next) {
365		if (eq(po->o_name, this)) {
366			printf("%s: Duplicate option %s.\n",
367			       fname, this);
368			exit(1);
369		}
370	}
371
372	po = (struct opt_list *) malloc(sizeof *po);
373	bzero(po, sizeof(*po));
374	po->o_name = this;
375	po->o_file = val;
376	po->o_next = otab;
377	otab = po;
378
379	goto next;
380}
381
382static char *
383lower(char *str)
384{
385	char *cp = str;
386
387	while (*str) {
388		if (isupper(*str))
389			*str = tolower(*str);
390		str++;
391	}
392	return (cp);
393}
394