FreeBSD-5.3/usr.sbin/config/mkoptions.c
/*
* Copyright (c) 1995 Peter Wemm
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
* 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)mkheaders.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$FreeBSD: src/usr.sbin/config/mkoptions.c,v 1.32 2004/08/07 04:19:37 imp Exp $";
#endif /* not lint */
/*
* Make all the .h files for the optional entries
*/
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <string.h>
#include <sys/param.h>
#include "config.h"
#include "y.tab.h"
static struct users {
int u_default;
int u_min;
int u_max;
} users = { 8, 2, 512 };
static char *lower(char *);
static void read_options(void);
static void do_option(char *);
static char *tooption(char *);
void
options(void)
{
char buf[40];
struct cputype *cp;
struct opt_list *ol;
struct opt *op;
/* Fake the cpu types as options. */
SLIST_FOREACH(cp, &cputype, cpu_next) {
op = (struct opt *)malloc(sizeof(*op));
memset(op, 0, sizeof(*op));
op->op_name = ns(cp->cpu_name);
SLIST_INSERT_HEAD(&opt, op, op_next);
}
if (maxusers == 0) {
/* printf("maxusers not specified; will auto-size\n"); */
} else if (maxusers < users.u_min) {
printf("minimum of %d maxusers assumed\n", users.u_min);
maxusers = users.u_min;
} else if (maxusers > users.u_max)
printf("warning: maxusers > %d (%d)\n", users.u_max, maxusers);
/* Fake MAXUSERS as an option. */
op = (struct opt *)malloc(sizeof(*op));
memset(op, 0, sizeof(*op));
op->op_name = ns("MAXUSERS");
snprintf(buf, sizeof(buf), "%d", maxusers);
op->op_value = ns(buf);
SLIST_INSERT_HEAD(&opt, op, op_next);
read_options();
SLIST_FOREACH(ol, &otab, o_next)
do_option(ol->o_name);
SLIST_FOREACH(op, &opt, op_next) {
if (!op->op_ownfile && strncmp(op->op_name, "DEV_", 4)) {
printf("%s: unknown option \"%s\"\n",
PREFIX, op->op_name);
exit(1);
}
}
}
/*
* Generate an <options>.h file
*/
static void
do_option(char *name)
{
char *file, *inw;
const char *basefile;
struct opt_list *ol;
struct opt *op;
struct opt_head op_head;
FILE *inf, *outf;
char *value;
char *oldvalue;
int seen;
int tidy;
file = tooption(name);
/*
* Check to see if the option was specified..
*/
value = NULL;
SLIST_FOREACH(op, &opt, op_next) {
if (eq(name, op->op_name)) {
oldvalue = value;
value = op->op_value;
if (value == NULL)
value = ns("1");
if (oldvalue != NULL && !eq(value, oldvalue))
printf(
"%s: option \"%s\" redefined from %s to %s\n",
PREFIX, op->op_name, oldvalue,
value);
op->op_ownfile++;
}
}
remember(file);
inf = fopen(file, "r");
if (inf == 0) {
outf = fopen(file, "w");
if (outf == 0)
err(1, "%s", file);
/* was the option in the config file? */
if (value) {
fprintf(outf, "#define %s %s\n", name, value);
} /* else empty file */
(void) fclose(outf);
return;
}
basefile = "";
SLIST_FOREACH(ol, &otab, o_next)
if (eq(name, ol->o_name)) {
basefile = ol->o_file;
break;
}
oldvalue = NULL;
SLIST_INIT(&op_head);
seen = 0;
tidy = 0;
for (;;) {
char *cp;
char *invalue;
/* get the #define */
if ((inw = get_word(inf)) == 0 || inw == (char *)EOF)
break;
/* get the option name */
if ((inw = get_word(inf)) == 0 || inw == (char *)EOF)
break;
inw = ns(inw);
/* get the option value */
if ((cp = get_word(inf)) == 0 || cp == (char *)EOF)
break;
/* option value */
invalue = ns(cp); /* malloced */
if (eq(inw, name)) {
oldvalue = invalue;
invalue = value;
seen++;
}
SLIST_FOREACH(ol, &otab, o_next)
if (eq(inw, ol->o_name))
break;
if (!eq(inw, name) && !ol) {
printf("WARNING: unknown option `%s' removed from %s\n",
inw, file);
tidy++;
} else if (ol != NULL && !eq(basefile, ol->o_file)) {
printf("WARNING: option `%s' moved from %s to %s\n",
inw, basefile, ol->o_file);
tidy++;
} else {
op = (struct opt *) malloc(sizeof *op);
bzero(op, sizeof(*op));
op->op_name = inw;
op->op_value = invalue;
SLIST_INSERT_HEAD(&op_head, op, op_next);
}
/* EOL? */
cp = get_word(inf);
if (cp == (char *)EOF)
break;
}
(void) fclose(inf);
if (!tidy && ((value == NULL && oldvalue == NULL) ||
(value && oldvalue && eq(value, oldvalue)))) {
while (!SLIST_EMPTY(&op_head)) {
op = SLIST_FIRST(&op_head);
SLIST_REMOVE_HEAD(&op_head, op_next);
free(op->op_name);
free(op->op_value);
free(op);
}
return;
}
if (value && !seen) {
/* New option appears */
op = (struct opt *) malloc(sizeof *op);
bzero(op, sizeof(*op));
op->op_name = ns(name);
op->op_value = value ? ns(value) : NULL;
SLIST_INSERT_HEAD(&op_head, op, op_next);
}
outf = fopen(file, "w");
if (outf == 0)
err(1, "%s", file);
while (!SLIST_EMPTY(&op_head)) {
op = SLIST_FIRST(&op_head);
/* was the option in the config file? */
if (op->op_value) {
fprintf(outf, "#define %s %s\n",
op->op_name, op->op_value);
}
SLIST_REMOVE_HEAD(&op_head, op_next);
free(op->op_name);
free(op->op_value);
free(op);
}
(void) fclose(outf);
}
/*
* Find the filename to store the option spec into.
*/
static char *
tooption(char *name)
{
static char hbuf[MAXPATHLEN];
char nbuf[MAXPATHLEN];
struct opt_list *po;
/* "cannot happen"? the otab list should be complete.. */
(void) strlcpy(nbuf, "options.h", sizeof(nbuf));
SLIST_FOREACH(po, &otab, o_next) {
if (eq(po->o_name, name)) {
strlcpy(nbuf, po->o_file, sizeof(nbuf));
break;
}
}
(void) strlcpy(hbuf, path(nbuf), sizeof(hbuf));
return (hbuf);
}
/*
* read the options and options.<machine> files
*/
static void
read_options(void)
{
FILE *fp;
char fname[MAXPATHLEN];
char *wd, *this, *val;
struct opt_list *po;
int first = 1;
char genopt[MAXPATHLEN];
SLIST_INIT(&otab);
if (ident == NULL) {
printf("no ident line specified\n");
exit(1);
}
(void) snprintf(fname, sizeof(fname), "../../conf/options");
openit:
fp = fopen(fname, "r");
if (fp == 0) {
return;
}
next:
wd = get_word(fp);
if (wd == (char *)EOF) {
(void) fclose(fp);
if (first == 1) {
first++;
(void) snprintf(fname, sizeof fname, "../../conf/options.%s", machinename);
fp = fopen(fname, "r");
if (fp != 0)
goto next;
(void) snprintf(fname, sizeof fname, "options.%s", machinename);
goto openit;
}
return;
}
if (wd == 0)
goto next;
if (wd[0] == '#')
{
while (((wd = get_word(fp)) != (char *)EOF) && wd)
;
goto next;
}
this = ns(wd);
val = get_word(fp);
if (val == (char *)EOF)
return;
if (val == 0) {
char *s = ns(this);
(void) snprintf(genopt, sizeof(genopt), "opt_%s.h", lower(s));
val = genopt;
free(s);
}
val = ns(val);
SLIST_FOREACH(po, &otab, o_next) {
if (eq(po->o_name, this)) {
printf("%s: Duplicate option %s.\n",
fname, this);
exit(1);
}
}
po = (struct opt_list *) malloc(sizeof *po);
bzero(po, sizeof(*po));
po->o_name = this;
po->o_file = val;
SLIST_INSERT_HEAD(&otab, po, o_next);
goto next;
}
static char *
lower(char *str)
{
char *cp = str;
while (*str) {
if (isupper(*str))
*str = tolower(*str);
str++;
}
return (cp);
}