usr.sbin/config/mkoptions.c

   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  * @(#)mkheaders.c      8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.sbin/config/mkoptions.c,v 1.17.2.3 2001/12/13 19:18:01 dillon Exp $
  36  * $DragonFly: src/usr.sbin/config/mkoptions.c,v 1.19 2007/01/19 07:23:43 dillon Exp $
  37  */
  38
  39 /*
  40  * Make all the .h files for the optional entries
  41  */
  42
  43 #include <ctype.h>
  44 #include <err.h>
  45 #include <stdio.h>
  46 #include <string.h>
  47 #include <sys/param.h>
  48 #include "config.h"
  49 #include "y.tab.h"
  50
  51 static char *lower(char *);
  52 static void read_options(void);
  53 static void do_option(char *);
  54 static char *tooption(char *);
  55
  56 void
  57 options(void)
  58 {
  59         char buf[40];
  60         struct cputype *cp;
  61         struct opt_list *ol;
  62         struct opt *op;
  63
  64         /* Fake the cpu types as options. */
  65         for (cp = cputype; cp != NULL; cp = cp->cpu_next) {
  66                 op = malloc(sizeof(*op));
  67                 bzero(op, sizeof(*op));
  68                 op->op_name = strdup(cp->cpu_name);
  69                 op->op_next = opt;
  70                 opt = op;
  71         }
  72
  73         if (maxusers == 0) {
  74                 /* printf("maxusers not specified; will auto-size\n"); */
  75                 /* maxusers = 0; */
  76         } else if (maxusers < 2) {
  77                 puts("minimum of 2 maxusers assumed");
  78                 maxusers = 2;
  79         } else if (maxusers > 512) {
  80                 printf("warning: maxusers > 512 (%d)\n", maxusers);
  81         }
  82
  83         /* Fake MAXUSERS as an option. */
  84         op = malloc(sizeof(*op));
  85         bzero(op, sizeof(*op));
  86         op->op_name = strdup("MAXUSERS");
  87         snprintf(buf, sizeof(buf), "%d", maxusers);
  88         op->op_value = strdup(buf);
  89         op->op_next = opt;
  90         opt = op;
  91
  92         read_options();
  93         for (ol = otab; ol != NULL; ol = ol->o_next)
  94                 do_option(ol->o_name);
  95         for (op = opt; op != NULL; op = op->op_next) {
  96                 if (!op->op_ownfile) {
  97                         printf("%s:%d: unknown option \"%s\"\n",
  98                                PREFIX, op->op_line, op->op_name);
  99                         exit(1);
 100                 }
 101         }
 102 }
 103
 104 /*
 105  * Generate an <options>.h file
 106  */
 107
 108 static void
 109 do_option(char *name)
 110 {
 111         const char *basefile, *file;
 112         char *inw;
 113         struct opt_list *ol;
 114         struct opt *op, *op_head, *topp;
 115         FILE *inf, *outf;
 116         char *value;
 117         char *oldvalue;
 118         int seen;
 119         int tidy;
 120
 121         file = tooption(name);
 122
 123         /*
 124          * Check to see if the option was specified..
 125          */
 126         value = NULL;
 127         for (op = opt; op != NULL; op = op->op_next) {
 128                 if (strcmp(name, op->op_name) == 0) {
 129                         oldvalue = value;
 130                         value = op->op_value;
 131                         if (value == NULL)
 132                                 value = strdup("1");
 133                         if (oldvalue != NULL && strcmp(value, oldvalue) != 0)
 134                                 printf(
 135                             "%s:%d: option \"%s\" redefined from %s to %s\n",
 136                                    PREFIX, op->op_line, op->op_name, oldvalue,
 137                                    value);
 138                         op->op_ownfile++;
 139                 }
 140         }
 141
 142         inf = fopen(file, "r");
 143         if (inf == NULL) {
 144                 outf = fopen(file, "w");
 145                 if (outf == NULL)
 146                         err(1, "%s", file);
 147
 148                 /* was the option in the config file? */
 149                 if (value) {
 150                         fprintf(outf, "#define %s %s\n", name, value);
 151                 } /* else empty file */
 152
 153                 fclose(outf);
 154                 return;
 155         }
 156         basefile = "";
 157         for (ol = otab; ol != NULL; ol = ol->o_next)
 158                 if (strcmp(name, ol->o_name) == 0) {
 159                         basefile = ol->o_file;
 160                         break;
 161                 }
 162         oldvalue = NULL;
 163         op_head = NULL;
 164         seen = 0;
 165         tidy = 0;
 166         for (;;) {
 167                 char *cp;
 168                 char *invalue;
 169
 170                 /* get the #define */
 171                 if ((inw = get_word(inf)) == NULL || inw == (char *)EOF)
 172                         break;
 173                 /* get the option name */
 174                 if ((inw = get_word(inf)) == NULL || inw == (char *)EOF)
 175                         break;
 176                 inw = strdup(inw);
 177                 /* get the option value */
 178                 if ((cp = get_word(inf)) == NULL || cp == (char *)EOF)
 179                         break;
 180                 /* option value */
 181                 invalue = strdup(cp); /* malloced */
 182                 if (strcmp(inw, name) == 0) {
 183                         oldvalue = invalue;
 184                         invalue = value;
 185                         seen++;
 186                 }
 187                 for (ol = otab; ol != NULL; ol = ol->o_next)
 188                         if (strcmp(inw, ol->o_name) == 0)
 189                                 break;
 190                 if (strcmp(inw, name) != 0 && ol == NULL) {
 191                         printf("WARNING: unknown option `%s' removed from %s\n",
 192                                 inw, file);
 193                         tidy++;
 194                 } else if (ol != NULL && strcmp(basefile, ol->o_file) != 0) {
 195                         printf("WARNING: option `%s' moved from %s to %s\n",
 196                                 inw, basefile, ol->o_file);
 197                         tidy++;
 198                 } else {
 199                         op = malloc(sizeof(*op));
 200                         bzero(op, sizeof(*op));
 201                         op->op_name = inw;
 202                         op->op_value = invalue;
 203                         op->op_next = op_head;
 204                         op_head = op;
 205                 }
 206
 207                 /* EOL? */
 208                 cp = get_word(inf);
 209                 if (cp == (char *)EOF)
 210                         break;
 211         }
 212         fclose(inf);
 213         if (!tidy && ((value == NULL && oldvalue == NULL) ||
 214             (value && oldvalue && strcmp(value, oldvalue) == 0))) {
 215                 for (op = op_head; op != NULL; op = topp) {
 216                         topp = op->op_next;
 217                         free(op->op_name);
 218                         free(op->op_value);
 219                         free(op);
 220                 }
 221                 return;
 222         }
 223
 224         if (value != NULL && !seen) {
 225                 /* New option appears */
 226                 op = malloc(sizeof(*op));
 227                 bzero(op, sizeof(*op));
 228                 op->op_name = strdup(name);
 229                 op->op_value = value != NULL ? strdup(value) : NULL;
 230                 op->op_next = op_head;
 231                 op_head = op;
 232         }
 233
 234         outf = fopen(file, "w");
 235         if (outf == 0)
 236                 err(1, "%s", file);
 237         for (op = op_head; op != NULL; op = topp) {
 238                 /* was the option in the config file? */
 239                 if (op->op_value != NULL) {
 240                         fprintf(outf, "#define %s %s\n",
 241                                 op->op_name, op->op_value);
 242                 }
 243                 topp = op->op_next;
 244                 free(op->op_name);
 245                 free(op->op_value);
 246                 free(op);
 247         }
 248         fclose(outf);
 249 }
 250
 251 /*
 252  * Find the filename to store the option spec into.
 253  */
 254 static char *
 255 tooption(char *name)
 256 {
 257         static char hbuf[MAXPATHLEN];
 258         char nbuf[MAXPATHLEN];
 259         struct opt_list *po;
 260
 261         /* "cannot happen"?  the otab list should be complete.. */
 262         strlcpy(nbuf, "options.h", sizeof(nbuf));
 263
 264         for (po = otab ; po != NULL; po = po->o_next) {
 265                 if (strcmp(po->o_name, name) == 0) {
 266                         strlcpy(nbuf, po->o_file, sizeof(nbuf));
 267                         break;
 268                 }
 269         }
 270
 271         strlcpy(hbuf, path(nbuf), sizeof(hbuf));
 272         return(hbuf);
 273 }
 274
 275 /*
 276  * read the options and options.<machine> files
 277  */
 278 static void
 279 read_options(void)
 280 {
 281         FILE *fp;
 282         char fname[MAXPATHLEN];
 283         char *wd, *this, *val;
 284         struct opt_list *po;
 285         int first = 1;
 286         char genopt[MAXPATHLEN];
 287
 288         otab = NULL;
 289         if (ident == NULL) {
 290                 printf("no ident line specified\n");
 291                 exit(1);
 292         }
 293         snprintf(fname, sizeof(fname), "../conf/options");
 294 openit:
 295         fp = fopen(fname, "r");
 296         if (fp == NULL) {
 297                 return;
 298         }
 299 next:
 300         wd = get_word(fp);
 301         if (wd == (char *)EOF) {
 302                 fclose(fp);
 303                 if (first == 1) {
 304                         first++;
 305                         snprintf(fname, sizeof(fname),
 306                                  "../platform/%s/conf/options",
 307                                  platformname);
 308                         fp = fopen(fname, "r");
 309                         if (fp != NULL)
 310                                 goto next;
 311                         snprintf(fname, sizeof(fname), "options.%s",
 312                                  platformname);
 313                         goto openit;
 314                 }
 315                 if (first == 2) {
 316                         first++;
 317                         snprintf(fname, sizeof(fname), "options.%s", raisestr(ident));
 318                         fp = fopen(fname, "r");
 319                         if (fp != NULL)
 320                                 goto next;
 321                 }
 322                 return;
 323         }
 324         if (wd == NULL)
 325                 goto next;
 326         if (wd[0] == '#')
 327         {
 328                 while (((wd = get_word(fp)) != (char *)EOF) && wd != NULL)
 329                         ;
 330                 goto next;
 331         }
 332         this = strdup(wd);
 333         val = get_word(fp);
 334         if (val == (char *)EOF)
 335                 return;
 336         if (val == 0) {
 337                 char *s;
 338
 339                 s = strdup(this);
 340                 snprintf(genopt, sizeof(genopt), "opt_%s.h", lower(s));
 341                 val = genopt;
 342                 free(s);
 343         }
 344         val = strdup(val);
 345
 346         for (po = otab; po != NULL; po = po->o_next) {
 347                 if (strcmp(po->o_name, this) == 0) {
 348                         printf("%s: Duplicate option %s.\n",
 349                                fname, this);
 350                         exit(1);
 351                 }
 352         }
 353
 354         po = malloc(sizeof(*po));
 355         bzero(po, sizeof(*po));
 356         po->o_name = this;
 357         po->o_file = val;
 358         po->o_next = otab;
 359         otab = po;
 360
 361         goto next;
 362 }
 363
 364 static char *
 365 lower(char *str)
 366 {
 367         char *cp = str;
 368
 369         while (*str) {
 370                 if (isupper(*str))
 371                         *str = tolower(*str);
 372                 str++;
 373         }
 374         return(cp);
 375 }
 376