mkoptions.c revision 72684 
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 72684 2001-02-19 04:43:21Z 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= { 8, 2, 512 };
60
61static char *lower(char *);
62static void read_options(void);
63static void do_option(char *);
64static char *tooption(char *);
65
66void
67options(void)
68{
69	char buf[40];
70	struct cputype *cp;
71	struct opt_list *ol;
72	struct opt *op;
73
74	/* Fake the cpu types as options. */
75	for (cp = cputype; cp != NULL; cp = cp->cpu_next) {
76		op = (struct opt *)malloc(sizeof(*op));
77		memset(op, 0, sizeof(*op));
78		op->op_name = ns(cp->cpu_name);
79		op->op_next = opt;
80		opt = op;
81	}
82
83	if (maxusers == 0) {
84		printf("maxusers not specified; %d assumed\n", users.u_default);
85		maxusers = users.u_default;
86	} else if (maxusers < users.u_min) {
87		printf("minimum of %d maxusers assumed\n", users.u_min);
88		maxusers = users.u_min;
89	} else if (maxusers > users.u_max)
90		printf("warning: maxusers > %d (%d)\n", users.u_max, maxusers);
91
92	/* Fake MAXUSERS as an option. */
93	op = (struct opt *)malloc(sizeof(*op));
94	memset(op, 0, sizeof(*op));
95	op->op_name = ns("MAXUSERS");
96	snprintf(buf, sizeof(buf), "%d", maxusers);
97	op->op_value = ns(buf);
98	op->op_next = opt;
99	opt = op;
100
101	read_options();
102	for (ol = otab; ol != 0; ol = ol->o_next)
103		do_option(ol->o_name);
104	for (op = opt; op; op = op->op_next) {
105		if (!op->op_ownfile && strncmp(op->op_name, "DEV_", 4)) {
106			printf("%s:%d: unknown option \"%s\"\n",
107			       PREFIX, op->op_line, op->op_name);
108			exit(1);
109		}
110	}
111}
112
113/*
114 * Generate an <options>.h file
115 */
116
117static void
118do_option(char *name)
119{
120	char *file, *inw;
121	const char *basefile;
122	struct opt_list *ol;
123	struct opt *op, *op_head, *topp;
124	FILE *inf, *outf;
125	char *value;
126	char *oldvalue;
127	int seen;
128	int tidy;
129
130	file = tooption(name);
131
132	/*
133	 * Check to see if the option was specified..
134	 */
135	value = NULL;
136	for (op = opt; op; op = op->op_next) {
137		if (eq(name, op->op_name)) {
138			oldvalue = value;
139			value = op->op_value;
140			if (value == NULL)
141				value = ns("1");
142			if (oldvalue != NULL && !eq(value, oldvalue))
143				printf(
144			    "%s:%d: option \"%s\" redefined from %s to %s\n",
145				   PREFIX, op->op_line, op->op_name, oldvalue,
146				   value);
147			op->op_ownfile++;
148		}
149	}
150
151	remember(file);
152	inf = fopen(file, "r");
153	if (inf == 0) {
154		outf = fopen(file, "w");
155		if (outf == 0)
156			err(1, "%s", file);
157
158		/* was the option in the config file? */
159		if (value) {
160			fprintf(outf, "#define %s %s\n", name, value);
161		} /* else empty file */
162
163		(void) fclose(outf);
164		return;
165	}
166	basefile = "";
167	for (ol = otab; ol != 0; ol = ol->o_next)
168		if (eq(name, ol->o_name)) {
169			basefile = ol->o_file;
170			break;
171		}
172	oldvalue = NULL;
173	op_head = NULL;
174	seen = 0;
175	tidy = 0;
176	for (;;) {
177		char *cp;
178		char *invalue;
179
180		/* get the #define */
181		if ((inw = get_word(inf)) == 0 || inw == (char *)EOF)
182			break;
183		/* get the option name */
184		if ((inw = get_word(inf)) == 0 || inw == (char *)EOF)
185			break;
186		inw = ns(inw);
187		/* get the option value */
188		if ((cp = get_word(inf)) == 0 || cp == (char *)EOF)
189			break;
190		/* option value */
191		invalue = ns(cp); /* malloced */
192		if (eq(inw, name)) {
193			oldvalue = invalue;
194			invalue = value;
195			seen++;
196		}
197		for (ol = otab; ol != 0; ol = ol->o_next)
198			if (eq(inw, ol->o_name))
199				break;
200		if (!eq(inw, name) && !ol) {
201			printf("WARNING: unknown option `%s' removed from %s\n",
202				inw, file);
203			tidy++;
204		} else if (ol != NULL && !eq(basefile, ol->o_file)) {
205			printf("WARNING: option `%s' moved from %s to %s\n",
206				inw, basefile, ol->o_file);
207			tidy++;
208		} else {
209			op = (struct opt *) malloc(sizeof *op);
210			bzero(op, sizeof(*op));
211			op->op_name = inw;
212			op->op_value = invalue;
213			op->op_next = op_head;
214			op_head = op;
215		}
216
217		/* EOL? */
218		cp = get_word(inf);
219		if (cp == (char *)EOF)
220			break;
221	}
222	(void) fclose(inf);
223	if (!tidy && ((value == NULL && oldvalue == NULL) ||
224	    (value && oldvalue && eq(value, oldvalue)))) {
225		for (op = op_head; op != NULL; op = topp) {
226			topp = op->op_next;
227			free(op->op_name);
228			free(op->op_value);
229			free(op);
230		}
231		return;
232	}
233
234	if (value && !seen) {
235		/* New option appears */
236		op = (struct opt *) malloc(sizeof *op);
237		bzero(op, sizeof(*op));
238		op->op_name = ns(name);
239		op->op_value = value ? ns(value) : NULL;
240		op->op_next = op_head;
241		op_head = op;
242	}
243
244	outf = fopen(file, "w");
245	if (outf == 0)
246		err(1, "%s", file);
247	for (op = op_head; op != NULL; op = topp) {
248		/* was the option in the config file? */
249		if (op->op_value) {
250			fprintf(outf, "#define %s %s\n",
251				op->op_name, op->op_value);
252		}
253		topp = op->op_next;
254		free(op->op_name);
255		free(op->op_value);
256		free(op);
257	}
258	(void) fclose(outf);
259}
260
261/*
262 * Find the filename to store the option spec into.
263 */
264static char *
265tooption(char *name)
266{
267	static char hbuf[MAXPATHLEN];
268	char nbuf[MAXPATHLEN];
269	struct opt_list *po;
270
271	/* "cannot happen"?  the otab list should be complete.. */
272	(void) strlcpy(nbuf, "options.h", sizeof(nbuf));
273
274	for (po = otab ; po != 0; po = po->o_next) {
275		if (eq(po->o_name, name)) {
276			strlcpy(nbuf, po->o_file, sizeof(nbuf));
277			break;
278		}
279	}
280
281	(void) strlcpy(hbuf, path(nbuf), sizeof(hbuf));
282	return (hbuf);
283}
284
285/*
286 * read the options and options.<machine> files
287 */
288static void
289read_options(void)
290{
291	FILE *fp;
292	char fname[MAXPATHLEN];
293	char *wd, *this, *val;
294	struct opt_list *po;
295	int first = 1;
296	char genopt[MAXPATHLEN];
297
298	otab = 0;
299	if (ident == NULL) {
300		printf("no ident line specified\n");
301		exit(1);
302	}
303	(void) snprintf(fname, sizeof(fname), "../../conf/options");
304openit:
305	fp = fopen(fname, "r");
306	if (fp == 0) {
307		return;
308	}
309next:
310	wd = get_word(fp);
311	if (wd == (char *)EOF) {
312		(void) fclose(fp);
313		if (first == 1) {
314			first++;
315			(void) snprintf(fname, sizeof fname, "../../conf/options.%s", machinename);
316			fp = fopen(fname, "r");
317			if (fp != 0)
318				goto next;
319			(void) snprintf(fname, sizeof fname, "options.%s", machinename);
320			goto openit;
321		}
322		if (first == 2) {
323			first++;
324			(void) snprintf(fname, sizeof fname, "options.%s", raisestr(ident));
325			fp = fopen(fname, "r");
326			if (fp != 0)
327				goto next;
328		}
329		return;
330	}
331	if (wd == 0)
332		goto next;
333	if (wd[0] == '#')
334	{
335		while (((wd = get_word(fp)) != (char *)EOF) && wd)
336		;
337		goto next;
338	}
339	this = ns(wd);
340	val = get_word(fp);
341	if (val == (char *)EOF)
342		return;
343	if (val == 0) {
344		char *s = ns(this);
345		(void) snprintf(genopt, sizeof(genopt), "opt_%s.h", lower(s));
346		val = genopt;
347		free(s);
348	}
349	val = ns(val);
350
351	for (po = otab ; po != 0; po = po->o_next) {
352		if (eq(po->o_name, this)) {
353			printf("%s: Duplicate option %s.\n",
354			       fname, this);
355			exit(1);
356		}
357	}
358
359	po = (struct opt_list *) malloc(sizeof *po);
360	bzero(po, sizeof(*po));
361	po->o_name = this;
362	po->o_file = val;
363	po->o_next = otab;
364	otab = po;
365
366	goto next;
367}
368
369static char *
370lower(char *str)
371{
372	char *cp = str;
373
374	while (*str) {
375		if (isupper(*str))
376			*str = tolower(*str);
377		str++;
378	}
379	return (cp);
380}
381