src/src/buildconfig.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2009 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8
   9 /*************************************************
  10 *       Build configuration header for Exim      *
  11 *************************************************/
  12
  13 /* This auxiliary program builds the file config.h by the following
  14 process:
  15
  16 First, it determines the size of off_t and time_t variables, and generates
  17 macro code to define OFF_T_FMT and TIME_T_FMT as suitable formats, if they are
  18 not already defined in the system-specific header file.
  19
  20 Then it reads Makefile, looking for certain OS-specific definitions which it
  21 uses to define some specific macros. Finally, it reads the defaults file
  22 config.h.defaults.
  23
  24 The defaults file contains normal C #define statements for various macros; if
  25 the name of a macro is found in the environment, the environment value replaces
  26 the default. If the default #define does not contain any value, then that macro
  27 is not copied to the created file unless there is some value in the
  28 environment.
  29
  30 This program is compiled and run as part of the Make process and is not
  31 normally called independently. */
  32
  33
  34 #include <ctype.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <sys/types.h>
  39 #include <pwd.h>
  40 #include <grp.h>
  41
  42 typedef struct {
  43   const char *name;
  44   int *flag;
  45 } have_item;
  46
  47 typedef struct {
  48   const char *name;
  49   char *data;
  50 } save_item;
  51
  52 static const char *db_opts[] = { "", "USE_DB", "USE_GDBM", "USE_TDB" };
  53
  54 static int have_ipv6 = 0;
  55 static int have_iconv = 0;
  56
  57 static char errno_quota[256];
  58 static char ostype[256];
  59 static char cc[256];
  60
  61 /* If any entry is an initial substring of another, the longer one must
  62 appear first. */
  63
  64 static have_item have_list[] = {
  65   { "HAVE_IPV6",      &have_ipv6 },
  66   { "HAVE_ICONV",     &have_iconv },
  67   { NULL, NULL}
  68 };
  69
  70 static save_item save_list[] = {
  71   { "ERRNO_QUOTA",    errno_quota },
  72   { "OSTYPE",         ostype },
  73   { "CC",             cc },
  74   { NULL, NULL}
  75 };
  76
  77
  78 /* Subroutine to check a string for precisely one instance of "%s". If not,
  79 bomb out. */
  80
  81 void
  82 check_percent_ess(char *value, char *name)
  83 {
  84 int OK = 0;
  85 char *p = strstr(value, "%s");
  86 if (p != NULL) OK = strstr(p+2, "%s") == NULL;
  87 if (!OK)
  88   {
  89   printf("\n*** \"%s\" (%s) must contain precisely one occurrence of\n"
  90     "*** \"%%s\". Please review your build-time configuration.\n\n/", value,
  91     name);
  92   exit(1);
  93   }
  94 }
  95
  96
  97 /* Main program */
  98
  99 int
 100 main(int argc, char **argv)
 101 {
 102 off_t test_off_t = 0;
 103 time_t test_time_t = 0;
 104 #if ! (__STDC_VERSION__ >= 199901L)
 105 size_t test_size_t = 0;
 106 unsigned long test_ulong_t = 0L;
 107 #endif
 108 long test_long_t = 0;
 109 FILE *base;
 110 FILE *new;
 111 int last_initial = 'A';
 112 int linecount = 0;
 113 int have_auth = 0;
 114 int in_local_makefile = 0;
 115 int use_which_db = 0;
 116 int use_which_db_in_local_makefile = 0;
 117 int support_crypteq = 0;
 118 char buffer[1024];
 119
 120 if (argc != 1)
 121   {
 122   printf("*** Buildconfig: called with incorrect arguments\n");
 123   exit(1);
 124   }
 125
 126 new = fopen("config.h", "wb");
 127 if (new == NULL)
 128   {
 129   printf("*** Buildconfig: failed to open config.h for output\n");
 130   exit(1);
 131   }
 132
 133 printf("Building configuration file config.h\n");
 134
 135 fprintf(new, "/*************************************************\n");
 136 fprintf(new, "*           Configuration header for Exim        *\n");
 137 fprintf(new, "*************************************************/\n\n");
 138
 139 fprintf(new, "/* This file was automatically generated from Makefile and "
 140   "config.h.defaults,\n");
 141 fprintf(new, "using values specified in the configuration file Local/Makefile.\n");
 142 fprintf(new, "Do not edit it. Instead, edit Local/Makefile and "
 143   "rerun make. */\n\n");
 144
 145 /* First, deal with the printing format for off_t variables. We assume that if
 146 the size of off_t is greater than 4, "%lld" will be available as a format for
 147 printing long long variables, and there will be support for the long long type.
 148 This assumption is known to be OK for the common operating systems. */
 149
 150 fprintf(new, "#ifndef OFF_T_FMT\n");
 151 if (sizeof(test_off_t) > sizeof(test_long_t))
 152   {
 153   fprintf(new, "#define OFF_T_FMT  \"%%lld\"\n");
 154   fprintf(new, "#define LONGLONG_T long long int\n");
 155   }
 156 else
 157   {
 158   fprintf(new, "#define OFF_T_FMT  \"%%ld\"\n");
 159   fprintf(new, "#define LONGLONG_T long int\n");
 160   }
 161 fprintf(new, "#endif\n\n");
 162
 163 /* Now do the same thing for time_t variables. If the length is greater than
 164 4, we want to assume long long support (even if off_t was less than 4). If the
 165 length is 4 or less, we can leave LONGLONG_T to whatever was defined above for
 166 off_t. */
 167
 168 fprintf(new, "#ifndef TIME_T_FMT\n");
 169 if (sizeof(test_time_t) > sizeof(test_long_t))
 170   {
 171   fprintf(new, "#define TIME_T_FMT  \"%%lld\"\n");
 172   fprintf(new, "#undef  LONGLONG_T\n");
 173   fprintf(new, "#define LONGLONG_T long long int\n");
 174   }
 175 else
 176   {
 177   fprintf(new, "#define TIME_T_FMT  \"%%ld\"\n");
 178   }
 179 fprintf(new, "#endif\n\n");
 180
 181 /* And for sizeof() results, size_t, which should with C99 be just %zu, deal
 182 with C99 not being ubiquitous yet.  Unfortunately. */
 183
 184 #if __STDC_VERSION__ >= 199901L
 185 fprintf(new, "#define SIZE_T_FMT  \"%%zu\"\n");
 186 #else
 187 if (sizeof(test_size_t) > sizeof (test_ulong_t))
 188   fprintf(new, "#define SIZE_T_FMT  \"%%llu\"\n");
 189 else
 190   fprintf(new, "#define SIZE_T_FMT  \"%%lu\"\n");
 191 #endif
 192
 193 /* Now search the makefile for certain settings */
 194
 195 base = fopen("Makefile", "rb");
 196 if (base == NULL)
 197   {
 198   printf("*** Buildconfig: failed to open Makefile\n");
 199   (void)fclose(new);
 200   exit(1);
 201   }
 202
 203 errno_quota[0] = 0;    /* no over-riding value set */
 204 ostype[0] = 0;         /* just in case */
 205 cc[0] = 0;
 206
 207 while (fgets(buffer, sizeof(buffer), base) != NULL)
 208   {
 209   int i;
 210   have_item *h;
 211   save_item *s;
 212   char *p = buffer + (int)strlen(buffer);
 213   linecount++;
 214   while (p > buffer && isspace((unsigned char)p[-1])) p--;
 215   *p = 0;
 216   p = buffer;
 217   while (isspace((unsigned char)*p)) p++;
 218
 219   /* Notice when we hit the user's makefile */
 220
 221   if (strcmp(p, "# From Local/Makefile") == 0)
 222     {
 223     in_local_makefile = 1;
 224     continue;
 225     }
 226
 227   /* Remember the last DB option setting. If we hit two in the user's
 228   Makefile, complain. */
 229
 230   for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++)
 231     {
 232     int len = (int)strlen(db_opts[i]);
 233     if (strncmp(p, db_opts[i], len) == 0 && (p[len] == ' ' || p[len] == '='))
 234       {
 235       if (in_local_makefile)
 236         {
 237         if (use_which_db_in_local_makefile)
 238           {
 239           printf("*** Only one of USE_DB, USE_GDBM, or USE_TDB should be "
 240             "defined in Local/Makefile\n");
 241           exit(1);
 242           }
 243         use_which_db_in_local_makefile = 1;
 244         }
 245       use_which_db = i;
 246       break;
 247       }
 248     }
 249   if (i < sizeof(db_opts)/sizeof(char *)) continue;
 250
 251   /* Items where we just save a boolean */
 252
 253   for (h = have_list; h->name != NULL; h++)
 254     {
 255     int len = (int)strlen(h->name);
 256     if (strncmp(p, h->name, len) == 0)
 257       {
 258       p += len;
 259       while (isspace((unsigned char)*p)) p++;
 260       if (*p++ != '=')
 261         {
 262         printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount);
 263         exit(1);
 264         }
 265       while (isspace((unsigned char)*p)) p++;
 266       if (strcmp(p, "YES") == 0 || strcmp(p, "yes") == 0) *(h->flag) = 1;
 267         else *(h->flag) = 0;   /* Must reset in case multiple instances */
 268       break;
 269       }
 270     }
 271
 272   if (h->name != NULL) continue;
 273
 274   /* Items where we save the complete string */
 275
 276   for (s = save_list; s->name != NULL; s++)
 277     {
 278     int len = (int)strlen(s->name);
 279     if (strncmp(p, s->name, len) == 0)
 280       {
 281       p += len;
 282       while (isspace((unsigned char)*p)) p++;
 283       if (*p++ != '=')
 284         {
 285         printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount);
 286         exit(1);
 287         }
 288       while (isspace((unsigned char)*p)) p++;
 289       strcpy(s->data, p);
 290       }
 291     }
 292   }
 293
 294 fprintf(new, "#define HAVE_IPV6             %s\n",
 295   have_ipv6? "TRUE" : "FALSE");
 296
 297 fprintf(new, "#define HAVE_ICONV            %s\n",
 298   have_iconv? "TRUE" : "FALSE");
 299
 300 if (errno_quota[0] != 0)
 301   fprintf(new, "\n#define ERRNO_QUOTA           %s\n", errno_quota);
 302
 303 if (strcmp(cc, "gcc") == 0 &&
 304     (strstr(ostype, "IRIX") != NULL || strstr(ostype, "AIX") != NULL))
 305   {
 306   fprintf(new, "\n/* This switch includes the code to fix the inet_ntoa() */");
 307   fprintf(new, "\n/* bug when using gcc on an IRIX or AIX system. */");
 308   fprintf(new, "\n#define USE_INET_NTOA_FIX");
 309   }
 310
 311 fprintf(new, "\n");
 312 (void)fclose(base);
 313
 314
 315 /* Now handle the macros listed in the defaults */
 316
 317 base = fopen("../src/config.h.defaults", "rb");
 318 if (base == NULL)
 319   {
 320   printf("*** Buildconfig: failed to open ../src/config.h.defaults\n");
 321   (void)fclose(new);
 322   exit(1);
 323   }
 324
 325 while (fgets(buffer, sizeof(buffer), base) != NULL)
 326   {
 327   int i;
 328   char name[256];
 329   char *value;
 330   char *p = buffer;
 331   char *q = name;
 332
 333   while (*p == ' ' || *p == '\t') p++;
 334
 335   if (strncmp(p, "#define ", 8) != 0) continue;
 336
 337   p += 8;
 338   while (*p == ' ' || *p == '\t') p++;
 339
 340   if (*p < last_initial) fprintf(new, "\n");
 341   last_initial = *p;
 342
 343   while (*p && (isalnum((unsigned char)*p) || *p == '_')) *q++ = *p++;
 344   *q = 0;
 345
 346   /* USE_DB, USE_GDBM, and USE_TDB are special cases. We want to have only
 347   one of them set. The scan of the Makefile has saved which was the last one
 348   encountered. */
 349
 350   for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++)
 351     {
 352     if (strcmp(name, db_opts[i]) == 0)
 353       {
 354       if (use_which_db == i)
 355         fprintf(new, "#define %s %.*syes\n", db_opts[i],
 356           21 - (int)strlen(db_opts[i]), "                         ");
 357       else
 358         fprintf(new, "/* %s not set */\n", name);
 359       break;
 360       }
 361     }
 362   if (i < sizeof(db_opts)/sizeof(char *)) continue;
 363
 364   /* EXIM_USER is a special case. We look in the environment for EXIM_USER or
 365   EXIM_UID (the latter for backward compatibility with Exim 3). If the value is
 366   not numeric, we look up the user, and default the GID if found. Otherwise,
 367   EXIM_GROUP or EXIM_GID must be in the environment. */
 368
 369   if (strcmp(name, "EXIM_UID") == 0)
 370     {
 371     uid_t uid = 0;
 372     gid_t gid = 0;
 373     int gid_set = 0;
 374     int uid_not_set = 0;
 375     char *username = NULL;
 376     char *groupname = NULL;
 377     char *s;
 378     char *user = getenv("EXIM_USER");
 379     char *group = getenv("EXIM_GROUP");
 380
 381     if (user == NULL) user = getenv("EXIM_UID");
 382     if (group == NULL) group = getenv("EXIM_GID");
 383
 384     if (user == NULL)
 385       {
 386       printf("\n*** EXIM_USER has not been defined in any of the Makefiles in "
 387         "the\n    \"Local\" directory. Please review your build-time "
 388         "configuration.\n\n");
 389       return 1;
 390       }
 391
 392     while (isspace((unsigned char)(*user))) user++;
 393     if (*user == 0)
 394       {
 395       printf("\n*** EXIM_USER is defined as an empty string in one of the "
 396         "files\n    in the \"Local\" directory. Please review your build-time"
 397         "\n    configuration.\n\n");
 398       return 1;
 399       }
 400
 401     for (s = user; *s != 0; s++)
 402       {
 403       if (iscntrl((unsigned char)(*s)))
 404         {
 405         printf("\n*** EXIM_USER contains the control character 0x%02X in one "
 406           "of the files\n    in the \"Local\" directory. Please review your "
 407           "build-time\n    configuration.\n\n", *s);
 408         return 1;
 409         }
 410       }
 411
 412     /* Numeric uid given */
 413
 414     if (user[strspn(user, "0123456789")] == 0)
 415       {
 416       uid = (uid_t)atoi(user);
 417       }
 418
 419     /* User name given. Normally, we look up the uid right away. However,
 420     people building binary distributions sometimes want to retain the name till
 421     runtime. This is supported if the name begins "ref:". */
 422
 423     else if (strncmp(user, "ref:", 4) == 0)
 424       {
 425       user += 4;
 426       while (isspace(*user)) user++;
 427       username = user;
 428       gid_set = 1;
 429       uid_not_set = 1;
 430       }
 431
 432     else
 433       {
 434       struct passwd *pw = getpwnam(user);
 435       if (pw == NULL)
 436         {
 437         printf("\n*** User \"%s\" (specified in one of the Makefiles) does not "
 438           "exist.\n    Please review your build-time configuration.\n\n",
 439           user);
 440         return 1;
 441         }
 442
 443       uid = pw->pw_uid;
 444       gid = pw->pw_gid;
 445       gid_set = 1;
 446       }
 447
 448     /* Use explicit group if set. */
 449
 450     if (group != NULL)
 451       {
 452       while (isspace((unsigned char)(*group))) group++;
 453       if (*group == 0)
 454         {
 455         printf("\n*** EXIM_GROUP is defined as an empty string in one of "
 456           "the files in the\n    \"Local\" directory. ");
 457         if (gid_set)
 458           {
 459           printf("If you want the Exim group to be taken from the\n    "
 460             "password data for the Exim user, just remove the EXIM_GROUP "
 461             "setting.\n    Otherwise, p");
 462           }
 463         else printf("EXIM_USER is defined numerically, so there is no"
 464           "\n    default for EXIM_GROUP and you must set it explicitly.\n    P");
 465         printf("lease review your build-time configuration.\n\n");
 466         return 1;
 467         }
 468
 469       for (s = group; *s != 0; s++)
 470         {
 471         if (iscntrl((unsigned char)(*s)))
 472           {
 473           printf("\n*** EXIM_GROUP contains the control character 0x%02X in one "
 474             "of the files\n    in the \"Local\" directory. Please review your "
 475             "build-time\n    configuration.\n\n", *s);
 476           return 1;
 477           }
 478         }
 479
 480       /* Group name given. This may be by reference or to be looked up now,
 481       as for user. */
 482
 483       if (strncmp(group, "ref:", 4) == 0)
 484         {
 485         group += 4;
 486         while (isspace(*group)) group++;
 487         groupname = group;
 488         }
 489
 490       else if (username != NULL)
 491         {
 492         groupname = group;
 493         }
 494
 495       else if (group[strspn(group, "0123456789")] == 0)
 496         {
 497         gid = (gid_t)atoi(group);
 498         }
 499
 500       else
 501         {
 502         struct group *gr = getgrnam(group);
 503         if (gr == NULL)
 504           {
 505           printf("\n*** Group \"%s\" (specified in one of the Makefiles) does "
 506             "not exist.\n   Please review your build-time configuration.\n\n",
 507             group);
 508           return 1;
 509           }
 510         gid = gr->gr_gid;
 511         }
 512       }
 513
 514     /* Else trouble unless found in passwd file with user */
 515
 516     else if (!gid_set)
 517       {
 518       printf("\n*** No group set for Exim. Please review your build-time "
 519         "configuration.\n\n");
 520       return 1;
 521       }
 522
 523     /* security sanity checks
 524     if ref: is being used, we can never be sure, but we can take reasonable
 525     steps to filter out the most obvious ones.  */
 526
 527     if ((!uid_not_set && uid == 0) ||
 528         ((username != NULL) && (
 529           (strcmp(username, "root") == 0) ||
 530           (strcmp(username, "toor") == 0) )))
 531       {
 532       printf("\n*** Exim's internal user must not be root.\n\n");
 533       return 1;
 534       }
 535
 536     /* Output user and group names or uid/gid. When names are set, uid/gid
 537     are set to zero but will be replaced at runtime. */
 538
 539     if (username != NULL)
 540       fprintf(new, "#define EXIM_USERNAME         \"%s\"\n", username);
 541     if (groupname != NULL)
 542       fprintf(new, "#define EXIM_GROUPNAME        \"%s\"\n", groupname);
 543
 544     fprintf(new, "#define EXIM_UID              %d\n", (int)uid);
 545     fprintf(new, "#define EXIM_GID              %d\n", (int)gid);
 546     continue;
 547     }
 548
 549   /* CONFIGURE_OWNER and CONFIGURE_GROUP are special cases. We look in the
 550   environment for first. If the value is not numeric, we look up the user or
 551   group. A lot of this code is similar to that for EXIM_USER, but it's easier
 552   to keep it separate. */
 553
 554   if (strcmp(name, "CONFIGURE_OWNER") == 0 ||
 555       strcmp(name, "CONFIGURE_GROUP") == 0)
 556     {
 557     int isgroup = name[10] == 'G';
 558     uid_t uid = 0;
 559     gid_t gid = 0;
 560     const char *s;
 561     const char *username = NULL;
 562     const char *user = getenv(name);
 563
 564     if (user == NULL) user = "";
 565     while (isspace((unsigned char)(*user))) user++;
 566     if (*user == 0)
 567       {
 568       fprintf(new, "/* %s not set */\n", name);
 569       continue;
 570       }
 571
 572     for (s = user; *s != 0; s++)
 573       {
 574       if (iscntrl((unsigned char)(*s)))
 575         {
 576         printf("\n*** %s contains the control character 0x%02X in "
 577           "one of the files\n    in the \"Local\" directory. Please review "
 578           "your build-time\n    configuration.\n\n", name, *s);
 579         return 1;
 580         }
 581       }
 582
 583     /* Numeric uid given */
 584
 585     if (user[strspn(user, "0123456789")] == 0)
 586       {
 587       if (isgroup)
 588         gid = (gid_t)atoi(user);
 589       else
 590         uid = (uid_t)atoi(user);
 591       }
 592
 593     /* Name given. Normally, we look up the uid or gid right away. However,
 594     people building binary distributions sometimes want to retain the name till
 595     runtime. This is supported if the name begins "ref:". */
 596
 597     else if (strncmp(user, "ref:", 4) == 0)
 598       {
 599       user += 4;
 600       while (isspace(*user)) user++;
 601       username = user;
 602       }
 603 else if (isgroup)
 604       {
 605       struct group *gr = getgrnam(user);
 606       if (gr == NULL)
 607         {
 608         printf("\n*** Group \"%s\" (specified in one of the Makefiles) does not "
 609           "exist.\n    Please review your build-time configuration.\n\n",
 610           user);
 611         return 1;
 612         }
 613       gid = gr->gr_gid;
 614       }
 615
 616     else
 617       {
 618       struct passwd *pw = getpwnam(user);
 619       if (pw == NULL)
 620         {
 621         printf("\n*** User \"%s\" (specified in one of the Makefiles) does not "
 622           "exist.\n    Please review your build-time configuration.\n\n",
 623           user);
 624         return 1;
 625         }
 626       uid = pw->pw_uid;
 627       }
 628
 629     /* Output user and group names or uid/gid. When names are set, uid/gid
 630     are set to zero but will be replaced at runtime. */
 631
 632     if (username != NULL)
 633       {
 634       if (isgroup)
 635         fprintf(new, "#define CONFIGURE_GROUPNAME         \"%s\"\n", username);
 636       else
 637         fprintf(new, "#define CONFIGURE_OWNERNAME         \"%s\"\n", username);
 638       }
 639
 640     if (isgroup)
 641       fprintf(new, "#define CONFIGURE_GROUP              %d\n", (int)gid);
 642     else
 643       fprintf(new, "#define CONFIGURE_OWNER              %d\n", (int)uid);
 644     continue;
 645     }
 646
 647   /* FIXED_NEVER_USERS is another special case. Look up the uid values and
 648   create suitable initialization data for a vector. */
 649
 650   if (strcmp(name, "FIXED_NEVER_USERS") == 0)
 651     {
 652     char *list = getenv("FIXED_NEVER_USERS");
 653     if (list == NULL)
 654       {
 655       fprintf(new, "#define FIXED_NEVER_USERS     0\n");
 656       }
 657     else
 658       {
 659       int count = 1;
 660       int i, j;
 661       uid_t *vector;
 662       char *p = list;
 663       while (*p != 0) if (*p++ == ':') count++;
 664
 665       vector = malloc((count+1) * sizeof(uid_t));
 666       vector[0] = (uid_t)count;
 667
 668       for (i = 1, j = 0; i <= count; list++, i++)
 669         {
 670         char name[64];
 671
 672         p = list;
 673         while (*list != 0 && *list != ':') list++;
 674         strncpy(name, p, list-p);
 675         name[list-p] = 0;
 676
 677         if (name[0] == 0)
 678           {
 679           continue;
 680           }
 681         else if (name[strspn(name, "0123456789")] == 0)
 682           {
 683           vector[j++] = (uid_t)atoi(name);
 684           }
 685         else
 686           {
 687           struct passwd *pw = getpwnam(name);
 688           if (pw == NULL)
 689             {
 690             printf("\n*** User \"%s\" (specified for FIXED_NEVER_USERS in one of the Makefiles) does not "
 691               "exist.\n    Please review your build-time configuration.\n\n",
 692               name);
 693             return 1;
 694             }
 695           vector[j++] = pw->pw_uid;
 696           }
 697         }
 698       fprintf(new, "#define FIXED_NEVER_USERS     %d", j);
 699       for (i = 0; i < j; i++) fprintf(new, ", %d", (unsigned int)vector[i]);
 700       fprintf(new, "\n");
 701       }
 702     continue;
 703     }
 704
 705   /* WITH_CONTENT_SCAN is another special case: it must be set if either it or
 706   WITH_OLD_DEMIME is set. */
 707
 708   if (strcmp(name, "WITH_CONTENT_SCAN") == 0)
 709     {
 710     char *wcs = getenv("WITH_CONTENT_SCAN");
 711     char *wod = getenv("WITH_OLD_DEMIME");
 712     char *dcc = getenv("EXPERIMENTAL_DCC");
 713     if (wcs != NULL || wod != NULL || dcc != NULL)
 714       fprintf(new, "#define WITH_CONTENT_SCAN     yes\n");
 715     else fprintf(new, "/* WITH_CONTENT_SCAN not set */\n");
 716     continue;
 717     }
 718
 719   /* Otherwise, check whether a value exists in the environment. Remember if
 720   it is an AUTH setting or SUPPORT_CRYPTEQ. */
 721
 722   if ((value = getenv(name)) != NULL)
 723     {
 724     int len;
 725     len = 21 - (int)strlen(name);
 726
 727     if (strncmp(name, "AUTH_", 5) == 0) have_auth = 1;
 728     if (strncmp(name, "SUPPORT_CRYPTEQ", 15) == 0) support_crypteq = 1;
 729
 730     /* The text value of LDAP_LIB_TYPE refers to a macro that gets set. */
 731
 732     if (strcmp(name, "LDAP_LIB_TYPE") == 0)
 733       {
 734       if (strcmp(value, "NETSCAPE") == 0 ||
 735           strcmp(value, "UMICHIGAN") == 0 ||
 736           strcmp(value, "OPENLDAP1") == 0 ||
 737           strcmp(value, "OPENLDAP2") == 0 ||
 738           strcmp(value, "SOLARIS") == 0 ||
 739           strcmp(value, "SOLARIS7") == 0)              /* Compatibility */
 740         {
 741         fprintf(new, "#define LDAP_LIB_%s\n", value);
 742         }
 743       else
 744         {
 745         printf("\n*** LDAP_LIB_TYPE=%s is not a recognized LDAP library type."
 746           "\n*** Please review your build-time configuration.\n\n", value);
 747         return 1;
 748         }
 749       }
 750
 751     else if (strcmp(name, "RADIUS_LIB_TYPE") == 0)
 752       {
 753       if (strcmp(value, "RADIUSCLIENT") == 0 ||
 754           strcmp(value, "RADIUSCLIENTNEW") == 0 ||
 755           strcmp(value, "RADLIB") == 0)
 756         {
 757         fprintf(new, "#define RADIUS_LIB_%s\n", value);
 758         }
 759       else
 760         {
 761         printf("\n*** RADIUS_LIB_TYPE=%s is not a recognized RADIUS library type."
 762           "\n*** Please review your build-time configuration.\n\n", value);
 763         return 1;
 764         }
 765       }
 766
 767     /* Other macros get set to the environment value. */
 768
 769     else
 770       {
 771       fprintf(new, "#define %s ", name);
 772       while(len-- > 0) fputc(' ', new);
 773
 774       /* LOG_FILE_PATH is now messy because it can be a path containing %s or
 775       it can be "syslog" or ":syslog" or "syslog:path" or even "path:syslog". */
 776
 777       if (strcmp(name, "LOG_FILE_PATH") == 0)
 778         {
 779         char *ss = value;
 780         for(;;)
 781           {
 782           char *pp;
 783           char *sss = strchr(ss, ':');
 784           if (sss != NULL)
 785             {
 786             strncpy(buffer, ss, sss-ss);
 787             buffer[sss-ss] = 0;  /* For empty case */
 788             }
 789           else strcpy(buffer, ss);
 790           pp = buffer + (int)strlen(buffer);
 791           while (pp > buffer && isspace((unsigned char)pp[-1])) pp--;
 792           *pp = 0;
 793           if (buffer[0] != 0 && strcmp(buffer, "syslog") != 0)
 794             check_percent_ess(buffer, name);
 795           if (sss == NULL) break;
 796           ss = sss + 1;
 797           while (isspace((unsigned char)*ss)) ss++;
 798           }
 799         fprintf(new, "\"%s\"\n", value);
 800         }
 801
 802       /* Timezone values HEADERS_CHARSET, TCP_WRAPPERS_DAEMON_NAME and
 803       WHITELIST_D_MACROS get quoted */
 804
 805       else if (strcmp(name, "TIMEZONE_DEFAULT") == 0||
 806                strcmp(name, "TCP_WRAPPERS_DAEMON_NAME") == 0||
 807                strcmp(name, "HEADERS_CHARSET") == 0||
 808                strcmp(name, "WHITELIST_D_MACROS") == 0)
 809         fprintf(new, "\"%s\"\n", value);
 810
 811       /* For others, quote any paths and don't quote anything else */
 812
 813       else
 814         {
 815         if (value[0] == '/') fprintf(new, "\"%s\"\n", value);
 816           else fprintf(new, "%s\n", value);
 817         }
 818       }
 819     }
 820
 821   /* Value not defined in the environment; use the default */
 822
 823   else
 824     {
 825     char *t = p;
 826     while (*p == ' ' || *p == '\t') p++;
 827     if (*p != '\n') fputs(buffer, new); else
 828       {
 829       *t = 0;
 830       if (strcmp(name, "BIN_DIRECTORY")   == 0 ||
 831           strcmp(name, "CONFIGURE_FILE")  == 0)
 832         {
 833         printf("\n*** %s has not been defined in any of the Makefiles in the\n"
 834           "    \"Local\" directory. "
 835           "Please review your build-time configuration.\n\n", name);
 836         return 1;
 837         }
 838
 839       if (strcmp(name, "TIMEZONE_DEFAULT") == 0)
 840         {
 841         char *tz = getenv("TZ");
 842         fprintf(new, "#define TIMEZONE_DEFAULT      ");
 843         if (tz == NULL) fprintf(new, "NULL\n"); else
 844           fprintf(new, "\"%s\"\n", tz);
 845         }
 846
 847       else fprintf(new, "/* %s not set */\n", name);
 848       }
 849     }
 850   }
 851
 852 (void)fclose(base);
 853
 854 /* If any AUTH macros were defined, ensure that SUPPORT_CRYPTEQ is also
 855 defined. */
 856
 857 if (have_auth)
 858   {
 859   if (!support_crypteq) fprintf(new, "/* Force SUPPORT_CRYPTEQ for AUTH */\n"
 860     "#define SUPPORT_CRYPTEQ\n");
 861   }
 862
 863 /* End off */
 864
 865 fprintf(new, "\n/* End of config.h */\n");
 866 (void)fclose(new);
 867 return 0;
 868 }
 869
 870 /* End of buildconfig.c */