src/src/buildconfig.c

   1 /* $Cambridge: exim/src/src/buildconfig.c,v 1.4 2004/12/29 16:24:03 ph10 Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2004 */
   8 /* See the file NOTICE for conditions of use and distribution. */
   9
  10
  11 /*************************************************
  12 *       Build configuration header for Exim      *
  13 *************************************************/
  14
  15 /* This auxiliary program builds the file config.h by the following
  16 process:
  17
  18 First it reads Makefile, looking for certain OS-specific definitions which it
  19 uses to define macros. Then it reads the defaults file config.h.defaults.
  20
  21 The defaults file contains normal C #define statements for various macros; if
  22 the name of a macro is found in the environment, the environment value replaces
  23 the default. If the default #define does not contain any value, then that macro
  24 is not copied to the created file unless there is some value in the
  25 environment.
  26
  27 This program is compiled and run as part of the Make process and is not
  28 normally called independently. */
  29
  30
  31 #include <ctype.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <sys/types.h>
  36 #include <pwd.h>
  37 #include <grp.h>
  38
  39 typedef struct {
  40   char *name;
  41   int *flag;
  42 } have_item;
  43
  44 typedef struct {
  45   char *name;
  46   char *data;
  47 } save_item;
  48
  49 static char *db_opts[] = { "", "USE_DB", "USE_GDBM", "USE_TDB" };
  50
  51 static int have_ipv6 = 0;
  52 static int have_iconv = 0;
  53
  54 static char errno_quota[256];
  55 static char ostype[256];
  56 static char cc[256];
  57
  58 /* If any entry is an initial substring of another, the longer one must
  59 appear first. */
  60
  61 static have_item have_list[] = {
  62   { "HAVE_IPV6",      &have_ipv6 },
  63   { "HAVE_ICONV",     &have_iconv },
  64   { NULL, NULL}
  65 };
  66
  67 static save_item save_list[] = {
  68   { "ERRNO_QUOTA",    errno_quota },
  69   { "OSTYPE",         ostype },
  70   { "CC",             cc },
  71   { NULL, NULL}
  72 };
  73
  74
  75 /* Subroutine to check a string for precisely one instance of "%s". If not,
  76 bomb out. */
  77
  78 void
  79 check_percent_ess(char *value, char *name)
  80 {
  81 int OK = 0;
  82 char *p = strstr(value, "%s");
  83 if (p != NULL) OK = strstr(p+2, "%s") == NULL;
  84 if (!OK)
  85   {
  86   printf("\n*** \"%s\" (%s) must contain precisely one occurrence of\n"
  87     "*** \"%%s\". Please review your build-time configuration.\n\n/", value,
  88     name);
  89   exit(1);
  90   }
  91 }
  92
  93
  94 /* Main program */
  95
  96 int
  97 main(int argc, char **argv)
  98 {
  99 FILE *base;
 100 FILE *new;
 101 int last_initial = 'A';
 102 int linecount = 0;
 103 int have_auth = 0;
 104 int in_local_makefile = 0;
 105 int use_which_db = 0;
 106 int use_which_db_in_local_makefile = 0;
 107 int support_crypteq = 0;
 108 char buffer[1024];
 109
 110 if (argc != 1)
 111   {
 112   printf("*** Buildconfig: called with incorrect arguments\n");
 113   exit(1);
 114   }
 115
 116 new = fopen("config.h", "wb");
 117 if (new == NULL)
 118   {
 119   printf("*** Buildconfig: failed to open config.h for output\n");
 120   exit(1);
 121   }
 122
 123 printf("Building configuration file config.h\n");
 124
 125 fprintf(new, "/*************************************************\n");
 126 fprintf(new, "*           Configuration header for Exim        *\n");
 127 fprintf(new, "*************************************************/\n\n");
 128
 129 fprintf(new, "/* This file was automatically generated from Makefile and "
 130   "config.h.defaults,\n");
 131 fprintf(new, "using values specified in the configuration file Local/Makefile.\n");
 132 fprintf(new, "Do not edit it. Instead, edit Local/Makefile and "
 133   "rerun make. */\n\n");
 134
 135 /* First, search the makefile for certain settings */
 136
 137 base = fopen("Makefile", "rb");
 138 if (base == NULL)
 139   {
 140   printf("*** Buildconfig: failed to open Makefile\n");
 141   fclose(new);
 142   exit(1);
 143   }
 144
 145 errno_quota[0] = 0;    /* no over-riding value set */
 146 ostype[0] = 0;         /* just in case */
 147 cc[0] = 0;
 148
 149 while (fgets(buffer, sizeof(buffer), base) != NULL)
 150   {
 151   int i;
 152   have_item *h;
 153   save_item *s;
 154   char *p = buffer + (int)strlen(buffer);
 155   linecount++;
 156   while (p > buffer && isspace((unsigned char)p[-1])) p--;
 157   *p = 0;
 158   p = buffer;
 159   while (isspace((unsigned char)*p)) p++;
 160
 161   /* Notice when we hit the user's makefile */
 162
 163   if (strcmp(p, "# From Local/Makefile") == 0)
 164     {
 165     in_local_makefile = 1;
 166     continue;
 167     }
 168
 169   /* Remember the last DB option setting. If we hit two in the user's
 170   Makefile, complain. */
 171
 172   for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++)
 173     {
 174     int len = (int)strlen(db_opts[i]);
 175     if (strncmp(p, db_opts[i], len) == 0 && (p[len] == ' ' || p[len] == '='))
 176       {
 177       if (in_local_makefile)
 178         {
 179         if (use_which_db_in_local_makefile)
 180           {
 181           printf("*** Only one of USE_DB, USE_GDBM, or USE_TDB should be "
 182             "defined in Local/Makefile\n");
 183           exit(1);
 184           }
 185         use_which_db_in_local_makefile = 1;
 186         }
 187       use_which_db = i;
 188       break;
 189       }
 190     }
 191   if (i < sizeof(db_opts)/sizeof(char *)) continue;
 192
 193   /* Items where we just save a boolean */
 194
 195   for (h = have_list; h->name != NULL; h++)
 196     {
 197     int len = (int)strlen(h->name);
 198     if (strncmp(p, h->name, len) == 0)
 199       {
 200       p += len;
 201       while (isspace((unsigned char)*p)) p++;
 202       if (*p++ != '=')
 203         {
 204         printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount);
 205         exit(1);
 206         }
 207       while (isspace((unsigned char)*p)) p++;
 208       if (strcmp(p, "YES") == 0 || strcmp(p, "yes") == 0) *(h->flag) = 1;
 209         else *(h->flag) = 0;   /* Must reset in case multiple instances */
 210       break;
 211       }
 212     }
 213
 214   if (h->name != NULL) continue;
 215
 216   /* Items where we save the complete string */
 217
 218   for (s = save_list; s->name != NULL; s++)
 219     {
 220     int len = (int)strlen(s->name);
 221     if (strncmp(p, s->name, len) == 0)
 222       {
 223       p += len;
 224       while (isspace((unsigned char)*p)) p++;
 225       if (*p++ != '=')
 226         {
 227         printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount);
 228         exit(1);
 229         }
 230       while (isspace((unsigned char)*p)) p++;
 231       strcpy(s->data, p);
 232       }
 233     }
 234   }
 235
 236 fprintf(new, "#define HAVE_IPV6             %s\n",
 237   have_ipv6? "TRUE" : "FALSE");
 238
 239 fprintf(new, "#define HAVE_ICONV            %s\n",
 240   have_iconv? "TRUE" : "FALSE");
 241
 242 if (errno_quota[0] != 0)
 243   fprintf(new, "\n#define ERRNO_QUOTA           %s\n", errno_quota);
 244
 245 if (strcmp(cc, "gcc") == 0 && strstr(ostype, "IRIX") != NULL)
 246   {
 247   fprintf(new, "\n/* This switch includes the code to fix the inet_ntoa() */");
 248   fprintf(new, "\n/* bug when using gcc on an IRIX system. */");
 249   fprintf(new, "\n#define USE_INET_NTOA_FIX");
 250   }
 251
 252 fprintf(new, "\n");
 253 fclose(base);
 254
 255
 256 /* Now handle the macros listed in the defaults */
 257
 258 base = fopen("../src/config.h.defaults", "rb");
 259 if (base == NULL)
 260   {
 261   printf("*** Buildconfig: failed to open ../src/config.h.defaults\n");
 262   fclose(new);
 263   exit(1);
 264   }
 265
 266 while (fgets(buffer, sizeof(buffer), base) != NULL)
 267   {
 268   int i;
 269   char name[256];
 270   char *value;
 271   char *p = buffer;
 272   char *q = name;
 273
 274   while (*p == ' ' || *p == '\t') p++;
 275
 276   if (strncmp(p, "#define ", 8) != 0) continue;
 277
 278   p += 8;
 279   while (*p == ' ' || *p == '\t') p++;
 280
 281   if (*p < last_initial) fprintf(new, "\n");
 282   last_initial = *p;
 283
 284   while (*p && (isalnum((unsigned char)*p) || *p == '_')) *q++ = *p++;
 285   *q = 0;
 286
 287   /* USE_DB, USE_GDBM, and USE_TDB are special cases. We want to have only
 288   one of them set. The scan of the Makefile has saved which was the last one
 289   encountered. */
 290
 291   for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++)
 292     {
 293     if (strcmp(name, db_opts[i]) == 0)
 294       {
 295       if (use_which_db == i)
 296         fprintf(new, "#define %s %.*syes\n", db_opts[i],
 297           21 - (int)strlen(db_opts[i]), "                         ");
 298       else
 299         fprintf(new, "/* %s not set */\n", name);
 300       break;
 301       }
 302     }
 303   if (i < sizeof(db_opts)/sizeof(char *)) continue;
 304
 305   /* EXIM_USER is a special case. We look in the environment for EXIM_USER or
 306   EXIM_UID (the latter for backward compatibility with Exim 3). If the value is
 307   not numeric, we look up the user, and default the GID if found. Otherwise,
 308   EXIM_GROUP or EXIM_GID must be in the environment. */
 309
 310   if (strcmp(name, "EXIM_UID") == 0)
 311     {
 312     uid_t uid = 0;
 313     gid_t gid = 0;
 314     int gid_set = 0;
 315     char *username = NULL;
 316     char *groupname = NULL;
 317     char *s;
 318     char *user = getenv("EXIM_USER");
 319     char *group = getenv("EXIM_GROUP");
 320
 321     if (user == NULL) user = getenv("EXIM_UID");
 322     if (group == NULL) group = getenv("EXIM_GID");
 323
 324     if (user == NULL)
 325       {
 326       printf("\n*** EXIM_USER has not been defined in any of the Makefiles in "
 327         "the\n    \"Local\" directory. Please review your build-time "
 328         "configuration.\n\n");
 329       return 1;
 330       }
 331
 332     while (isspace((unsigned char)(*user))) user++;
 333     if (*user == 0)
 334       {
 335       printf("\n*** EXIM_USER is defined as an empty string in one of the "
 336         "files\n    in the \"Local\" directory. Please review your build-time"
 337         "\n    configuration.\n\n");
 338       return 1;
 339       }
 340
 341     for (s = user; *s != 0; s++)
 342       {
 343       if (iscntrl((unsigned char)(*s)))
 344         {
 345         printf("\n*** EXIM_USER contains the control character 0x%02X in one "
 346           "of the files\n    in the \"Local\" directory. Please review your "
 347           "build-time\n    configuration.\n\n", *s);
 348         return 1;
 349         }
 350       }
 351
 352     /* Numeric uid given */
 353
 354     if (user[strspn(user, "0123456789")] == 0)
 355       {
 356       uid = (uid_t)atoi(user);
 357       }
 358
 359     /* User name given. Normally, we look up the uid right away. However,
 360     people building binary distributions sometimes want to retain the name till
 361     runtime. This is supported if the name begins "ref:". */
 362
 363     else if (strncmp(user, "ref:", 4) == 0)
 364       {
 365       user += 4;
 366       while (isspace(*user)) user++;
 367       username = user;
 368       gid_set = 1;
 369       }
 370
 371     else
 372       {
 373       struct passwd *pw = getpwnam(user);
 374       if (pw == NULL)
 375         {
 376         printf("\n*** User \"%s\" (specified in one of the Makefiles) does not "
 377           "exist.\n    Please review your build-time configuration.\n\n",
 378           user);
 379         return 1;
 380         }
 381
 382       uid = pw->pw_uid;
 383       gid = pw->pw_gid;
 384       gid_set = 1;
 385       }
 386
 387     /* Use explicit group if set. */
 388
 389     if (group != NULL)
 390       {
 391       while (isspace((unsigned char)(*group))) group++;
 392       if (*group == 0)
 393         {
 394         printf("\n*** EXIM_GROUP is defined as an empty string in one of "
 395           "the files in the\n    \"Local\" directory. ");
 396         if (gid_set)
 397           {
 398           printf("If you want the Exim group to be taken from the\n    "
 399             "password data for the Exim user, just remove the EXIM_GROUP "
 400             "setting.\n    Otherwise, p");
 401           }
 402         else printf("EXIM_USER is defined numerically, so there is no"
 403           "\n    default for EXIM_GROUP and you must set it explicitly.\n    P");
 404         printf("lease review your build-time configuration.\n\n");
 405         return 1;
 406         }
 407
 408       for (s = group; *s != 0; s++)
 409         {
 410         if (iscntrl((unsigned char)(*s)))
 411           {
 412           printf("\n*** EXIM_GROUP contains the control character 0x%02X in one "
 413             "of the files\n    in the \"Local\" directory. Please review your "
 414             "build-time\n    configuration.\n\n", *s);
 415           return 1;
 416           }
 417         }
 418
 419       /* Group name given. This may be by reference or to be looked up now,
 420       as for user. */
 421
 422       if (strncmp(group, "ref:", 4) == 0)
 423         {
 424         group += 4;
 425         while (isspace(*group)) group++;
 426         groupname = group;
 427         }
 428
 429       else if (username != NULL)
 430         {
 431         groupname = group;
 432         }
 433
 434       else if (group[strspn(group, "0123456789")] == 0)
 435         {
 436         gid = (gid_t)atoi(group);
 437         }
 438
 439       else
 440         {
 441         struct group *gr = getgrnam(group);
 442         if (gr == NULL)
 443           {
 444           printf("\n*** Group \"%s\" (specified in one of the Makefiles) does "
 445             "not exist.\n   Please review your build-time configuration.\n\n",
 446             group);
 447           return 1;
 448           }
 449         gid = gr->gr_gid;
 450         }
 451       }
 452
 453     /* Else trouble unless found in passwd file with user */
 454
 455     else if (!gid_set)
 456       {
 457       printf("\n*** No group set for Exim. Please review your build-time "
 458         "configuration.\n\n");
 459       return 1;
 460       }
 461
 462     /* Output user and group names or uid/gid. When names are set, uid/gid
 463     are set to zero but will be replaced at runtime. */
 464
 465     if (username != NULL)
 466       fprintf(new, "#define EXIM_USERNAME         \"%s\"\n", username);
 467     if (groupname != NULL)
 468       fprintf(new, "#define EXIM_GROUPNAME        \"%s\"\n", groupname);
 469
 470     fprintf(new, "#define EXIM_UID              %d\n", (int)uid);
 471     fprintf(new, "#define EXIM_GID              %d\n", (int)gid);
 472     continue;
 473     }
 474
 475   /* CONFIGURE_OWNER and CONFIGURE_GROUP are special cases. We look in the
 476   environment for first. If the value is not numeric, we look up the user or
 477   group. A lot of this code is similar to that for EXIM_USER, but it's easier
 478   to keep it separate. */
 479
 480   if (strcmp(name, "CONFIGURE_OWNER") == 0 ||
 481       strcmp(name, "CONFIGURE_GROUP") == 0)
 482     {
 483     int isgroup = name[10] == 'G';
 484     uid_t uid = 0;
 485     gid_t gid = 0;
 486     char *s;
 487     char *username = NULL;
 488     char *user = getenv(name);
 489
 490     if (user == NULL) user = "";
 491     while (isspace((unsigned char)(*user))) user++;
 492     if (*user == 0)
 493       {
 494       fprintf(new, "/* %s not set */\n", name);
 495       continue;
 496       }
 497
 498     for (s = user; *s != 0; s++)
 499       {
 500       if (iscntrl((unsigned char)(*s)))
 501         {
 502         printf("\n*** %s contains the control character 0x%02X in "
 503           "one of the files\n    in the \"Local\" directory. Please review "
 504           "your build-time\n    configuration.\n\n", name, *s);
 505         return 1;
 506         }
 507       }
 508
 509     /* Numeric uid given */
 510
 511     if (user[strspn(user, "0123456789")] == 0)
 512       {
 513       if (isgroup)
 514         gid = (gid_t)atoi(user);
 515       else
 516         uid = (uid_t)atoi(user);
 517       }
 518
 519     /* Name given. Normally, we look up the uid or gid right away. However,
 520     people building binary distributions sometimes want to retain the name till
 521     runtime. This is supported if the name begins "ref:". */
 522
 523     else if (strncmp(user, "ref:", 4) == 0)
 524       {
 525       user += 4;
 526       while (isspace(*user)) user++;
 527       username = user;
 528       }
 529
 530     else if (isgroup)
 531       {
 532       struct group *gr = getgrnam(user);
 533       if (gr == NULL)
 534         {
 535         printf("\n*** Group \"%s\" (specified in one of the Makefiles) does not "
 536           "exist.\n    Please review your build-time configuration.\n\n",
 537           user);
 538         return 1;
 539         }
 540       gid = gr->gr_gid;
 541       }
 542
 543     else
 544       {
 545       struct passwd *pw = getpwnam(user);
 546       if (pw == NULL)
 547         {
 548         printf("\n*** User \"%s\" (specified in one of the Makefiles) does not "
 549           "exist.\n    Please review your build-time configuration.\n\n",
 550           user);
 551         return 1;
 552         }
 553       uid = pw->pw_uid;
 554       }
 555
 556     /* Output user and group names or uid/gid. When names are set, uid/gid
 557     are set to zero but will be replaced at runtime. */
 558
 559     if (username != NULL)
 560       {
 561       if (isgroup)
 562         fprintf(new, "#define CONFIGURE_GROUPNAME         \"%s\"\n", username);
 563       else
 564         fprintf(new, "#define CONFIGURE_OWNERNAME         \"%s\"\n", username);
 565       }
 566
 567     if (isgroup)
 568       fprintf(new, "#define CONFIGURE_GROUP              %d\n", (int)gid);
 569     else
 570       fprintf(new, "#define CONFIGURE_OWNER              %d\n", (int)uid);
 571     continue;
 572     }
 573
 574   /* FIXED_NEVER_USERS is another special case. Look up the uid values and
 575   create suitable initialization data for a vector. */
 576
 577   if (strcmp(name, "FIXED_NEVER_USERS") == 0)
 578     {
 579     char *list = getenv("FIXED_NEVER_USERS");
 580     if (list == NULL)
 581       {
 582       fprintf(new, "#define FIXED_NEVER_USERS     0\n");
 583       }
 584     else
 585       {
 586       int count = 1;
 587       int i, j;
 588       uid_t *vector;
 589       char *p = list;
 590       while (*p != 0) if (*p++ == ':') count++;
 591
 592       vector = malloc((count+1) * sizeof(uid_t));
 593       vector[0] = (uid_t)count;
 594
 595       for (i = 1, j = 0; i <= count; list++, i++)
 596         {
 597         char name[64];
 598
 599         p = list;
 600         while (*list != 0 && *list != ':') list++;
 601         strncpy(name, p, list-p);
 602         name[list-p] = 0;
 603
 604         if (name[0] == 0)
 605           {
 606           continue;
 607           }
 608         else if (name[strspn(name, "0123456789")] == 0)
 609           {
 610           vector[j++] = (uid_t)atoi(name);
 611           }
 612         else
 613           {
 614           struct passwd *pw = getpwnam(name);
 615           if (pw == NULL)
 616             {
 617             printf("\n*** User \"%s\" (specified for FIXED_NEVER_USERS in one of the Makefiles) does not "
 618               "exist.\n    Please review your build-time configuration.\n\n",
 619               name);
 620             return 1;
 621             }
 622           vector[j++] = pw->pw_uid;
 623           }
 624         }
 625       fprintf(new, "#define FIXED_NEVER_USERS     %d", j);
 626       for (i = 0; i < j; i++) fprintf(new, ", %d", (unsigned int)vector[i]);
 627       fprintf(new, "\n");
 628       }
 629     continue;
 630     }
 631
 632   /* WITH_CONTENT_SCAN is another special case: it must be set if either it or
 633   WITH_OLD_DEMIME is set. */
 634
 635   if (strcmp(name, "WITH_CONTENT_SCAN") == 0)
 636     {
 637     char *wcs = getenv("WITH_CONTENT_SCAN");
 638     char *wod = getenv("WITH_OLD_DEMIME");
 639     if (wcs != NULL || wod != NULL)
 640       fprintf(new, "#define WITH_CONTENT_SCAN     yes\n");
 641     else fprintf(new, "/* WITH_CONTENT_SCAN not set */\n");
 642     continue;
 643     }
 644
 645   /* Otherwise, check whether a value exists in the environment. Remember if
 646   it is an AUTH setting or SUPPORT_CRYPTEQ. */
 647
 648   if ((value = getenv(name)) != NULL)
 649     {
 650     int len;
 651     len = 21 - (int)strlen(name);
 652
 653     if (strncmp(name, "AUTH_", 5) == 0) have_auth = 1;
 654     if (strncmp(name, "SUPPORT_CRYPTEQ", 15) == 0) support_crypteq = 1;
 655
 656     /* The text value of LDAP_LIB_TYPE refers to a macro that gets set. */
 657
 658     if (strcmp(name, "LDAP_LIB_TYPE") == 0)
 659       {
 660       if (strcmp(value, "NETSCAPE") == 0 ||
 661           strcmp(value, "UMICHIGAN") == 0 ||
 662           strcmp(value, "OPENLDAP1") == 0 ||
 663           strcmp(value, "OPENLDAP2") == 0 ||
 664           strcmp(value, "SOLARIS") == 0 ||
 665           strcmp(value, "SOLARIS7") == 0)              /* Compatibility */
 666         {
 667         fprintf(new, "#define LDAP_LIB_%s\n", value);
 668         }
 669       else
 670         {
 671         printf("\n*** LDAP_LIB_TYPE=%s is not a recognized LDAP library type."
 672           "\n*** Please review your build-time configuration.\n\n", value);
 673         return 1;
 674         }
 675       }
 676
 677     else if (strcmp(name, "RADIUS_LIB_TYPE") == 0)
 678       {
 679       if (strcmp(value, "RADIUSCLIENT") == 0 ||
 680           strcmp(value, "RADLIB") == 0)
 681         {
 682         fprintf(new, "#define RADIUS_LIB_%s\n", value);
 683         }
 684       else
 685         {
 686         printf("\n*** RADIUS_LIB_TYPE=%s is not a recognized RADIUS library type."
 687           "\n*** Please review your build-time configuration.\n\n", value);
 688         return 1;
 689         }
 690       }
 691
 692     /* Other macros get set to the environment value. */
 693
 694     else
 695       {
 696       fprintf(new, "#define %s ", name);
 697       while(len-- > 0) fputc(' ', new);
 698
 699       /* LOG_FILE_PATH is now messy because it can be a path containing %s or
 700       it can be "syslog" or ":syslog" or "syslog:path" or even "path:syslog". */
 701
 702       if (strcmp(name, "LOG_FILE_PATH") == 0)
 703         {
 704         char *ss = value;
 705         for(;;)
 706           {
 707           char *pp;
 708           char *sss = strchr(ss, ':');
 709           if (sss != NULL)
 710             {
 711             strncpy(buffer, ss, sss-ss);
 712             buffer[sss-ss] = 0;  /* For empty case */
 713             }
 714           else strcpy(buffer, ss);
 715           pp = buffer + (int)strlen(buffer);
 716           while (pp > buffer && isspace((unsigned char)pp[-1])) pp--;
 717           *pp = 0;
 718           if (buffer[0] != 0 && strcmp(buffer, "syslog") != 0)
 719             check_percent_ess(buffer, name);
 720           if (sss == NULL) break;
 721           ss = sss + 1;
 722           while (isspace((unsigned char)*ss)) ss++;
 723           }
 724         fprintf(new, "\"%s\"\n", value);
 725         }
 726
 727       /* Timezone values and HEADERS_CHARSET get quoted */
 728
 729       else if (strcmp(name, "TIMEZONE_DEFAULT") == 0||
 730                strcmp(name, "HEADERS_CHARSET") == 0)
 731         fprintf(new, "\"%s\"\n", value);
 732
 733       /* For others, quote any paths and don't quote anything else */
 734
 735       else
 736         {
 737         if (value[0] == '/') fprintf(new, "\"%s\"\n", value);
 738           else fprintf(new, "%s\n", value);
 739         }
 740       }
 741     }
 742
 743   /* Value not defined in the environment; use the default */
 744
 745   else
 746     {
 747     char *t = p;
 748     while (*p == ' ' || *p == '\t') p++;
 749     if (*p != '\n') fputs(buffer, new); else
 750       {
 751       *t = 0;
 752       if (strcmp(name, "BIN_DIRECTORY")   == 0 ||
 753           strcmp(name, "CONFIGURE_FILE")  == 0)
 754         {
 755         printf("\n*** %s has not been defined in any of the Makefiles in the\n"
 756           "    \"Local\" directory. "
 757           "Please review your build-time configuration.\n\n", name);
 758         return 1;
 759         }
 760
 761       if (strcmp(name, "TIMEZONE_DEFAULT") == 0)
 762         {
 763         char *tz = getenv("TZ");
 764         fprintf(new, "#define TIMEZONE_DEFAULT      ");
 765         if (tz == NULL) fprintf(new, "NULL\n"); else
 766           fprintf(new, "\"%s\"\n", tz);
 767         }
 768
 769       else fprintf(new, "/* %s not set */\n", name);
 770       }
 771     }
 772   }
 773
 774 fclose(base);
 775
 776 /* If any AUTH macros were defined, ensure that SUPPORT_CRYPTEQ is also
 777 defined. */
 778
 779 if (have_auth)
 780   {
 781   if (!support_crypteq) fprintf(new, "/* Force SUPPORT_CRYPTEQ for AUTH */\n"
 782     "#define SUPPORT_CRYPTEQ\n");
 783   }
 784
 785 /* End off */
 786
 787 fprintf(new, "\n/* End of config.h */\n");
 788 fclose(new);
 789 return 0;
 790 }
 791
 792 /* End of buildconfig.c */