Commit | Line | Data |
---|---|---|
059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
f9ba5e22 | 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
059ec3d9 PH |
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 | ||
c6c2dc1d PH |
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. | |
b1c749bb PH |
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. | |
059ec3d9 PH |
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> | |
02c30a32 JH |
39 | #include <sys/time.h> |
40 | #include <poll.h> | |
059ec3d9 PH |
41 | #include <pwd.h> |
42 | #include <grp.h> | |
43 | ||
44 | typedef struct { | |
1ba28e2b | 45 | const char *name; |
059ec3d9 PH |
46 | int *flag; |
47 | } have_item; | |
48 | ||
49 | typedef struct { | |
1ba28e2b | 50 | const char *name; |
059ec3d9 PH |
51 | char *data; |
52 | } save_item; | |
53 | ||
1ba28e2b | 54 | static const char *db_opts[] = { "", "USE_DB", "USE_GDBM", "USE_TDB" }; |
059ec3d9 PH |
55 | |
56 | static int have_ipv6 = 0; | |
57 | static int have_iconv = 0; | |
58 | ||
59 | static char errno_quota[256]; | |
60 | static char ostype[256]; | |
61 | static char cc[256]; | |
62 | ||
63 | /* If any entry is an initial substring of another, the longer one must | |
64 | appear first. */ | |
65 | ||
66 | static have_item have_list[] = { | |
67 | { "HAVE_IPV6", &have_ipv6 }, | |
68 | { "HAVE_ICONV", &have_iconv }, | |
69 | { NULL, NULL} | |
70 | }; | |
71 | ||
72 | static save_item save_list[] = { | |
73 | { "ERRNO_QUOTA", errno_quota }, | |
74 | { "OSTYPE", ostype }, | |
75 | { "CC", cc }, | |
76 | { NULL, NULL} | |
77 | }; | |
78 | ||
79 | ||
80 | /* Subroutine to check a string for precisely one instance of "%s". If not, | |
81 | bomb out. */ | |
82 | ||
83 | void | |
84 | check_percent_ess(char *value, char *name) | |
85 | { | |
86 | int OK = 0; | |
87 | char *p = strstr(value, "%s"); | |
88 | if (p != NULL) OK = strstr(p+2, "%s") == NULL; | |
89 | if (!OK) | |
90 | { | |
91 | printf("\n*** \"%s\" (%s) must contain precisely one occurrence of\n" | |
92 | "*** \"%%s\". Please review your build-time configuration.\n\n/", value, | |
93 | name); | |
94 | exit(1); | |
95 | } | |
96 | } | |
97 | ||
98 | ||
99 | /* Main program */ | |
100 | ||
101 | int | |
102 | main(int argc, char **argv) | |
103 | { | |
b1c749bb | 104 | off_t test_off_t = 0; |
c6c2dc1d | 105 | time_t test_time_t = 0; |
bb07bcd3 | 106 | ino_t test_ino_t; |
b3c261f7 | 107 | #if ! (__STDC_VERSION__ >= 199901L) |
73a46702 | 108 | size_t test_size_t = 0; |
17c76198 | 109 | ssize_t test_ssize_t = 0; |
73a46702 | 110 | unsigned long test_ulong_t = 0L; |
74d8288d | 111 | unsigned int test_uint_t = 0; |
b3c261f7 | 112 | #endif |
73a46702 | 113 | long test_long_t = 0; |
74d8288d | 114 | int test_int_t = 0; |
059ec3d9 PH |
115 | FILE *base; |
116 | FILE *new; | |
117 | int last_initial = 'A'; | |
118 | int linecount = 0; | |
119 | int have_auth = 0; | |
120 | int in_local_makefile = 0; | |
121 | int use_which_db = 0; | |
122 | int use_which_db_in_local_makefile = 0; | |
123 | int support_crypteq = 0; | |
124 | char buffer[1024]; | |
125 | ||
126 | if (argc != 1) | |
127 | { | |
128 | printf("*** Buildconfig: called with incorrect arguments\n"); | |
129 | exit(1); | |
130 | } | |
131 | ||
132 | new = fopen("config.h", "wb"); | |
133 | if (new == NULL) | |
134 | { | |
135 | printf("*** Buildconfig: failed to open config.h for output\n"); | |
136 | exit(1); | |
137 | } | |
138 | ||
139 | printf("Building configuration file config.h\n"); | |
140 | ||
141 | fprintf(new, "/*************************************************\n"); | |
142 | fprintf(new, "* Configuration header for Exim *\n"); | |
143 | fprintf(new, "*************************************************/\n\n"); | |
144 | ||
145 | fprintf(new, "/* This file was automatically generated from Makefile and " | |
146 | "config.h.defaults,\n"); | |
147 | fprintf(new, "using values specified in the configuration file Local/Makefile.\n"); | |
148 | fprintf(new, "Do not edit it. Instead, edit Local/Makefile and " | |
149 | "rerun make. */\n\n"); | |
150 | ||
b1c749bb PH |
151 | /* First, deal with the printing format for off_t variables. We assume that if |
152 | the size of off_t is greater than 4, "%lld" will be available as a format for | |
153 | printing long long variables, and there will be support for the long long type. | |
154 | This assumption is known to be OK for the common operating systems. */ | |
155 | ||
156 | fprintf(new, "#ifndef OFF_T_FMT\n"); | |
73a46702 | 157 | if (sizeof(test_off_t) > sizeof(test_long_t)) |
b1c749bb | 158 | { |
bb07bcd3 JH |
159 | fprintf(new, "# define OFF_T_FMT \"%%lld\"\n"); |
160 | fprintf(new, "# define LONGLONG_T long long int\n"); | |
b1c749bb PH |
161 | } |
162 | else | |
163 | { | |
bb07bcd3 JH |
164 | fprintf(new, "# define OFF_T_FMT \"%%ld\"\n"); |
165 | fprintf(new, "# define LONGLONG_T long int\n"); | |
c6c2dc1d PH |
166 | } |
167 | fprintf(new, "#endif\n\n"); | |
168 | ||
169 | /* Now do the same thing for time_t variables. If the length is greater than | |
170 | 4, we want to assume long long support (even if off_t was less than 4). If the | |
171 | length is 4 or less, we can leave LONGLONG_T to whatever was defined above for | |
172 | off_t. */ | |
173 | ||
174 | fprintf(new, "#ifndef TIME_T_FMT\n"); | |
73a46702 | 175 | if (sizeof(test_time_t) > sizeof(test_long_t)) |
c6c2dc1d | 176 | { |
bb07bcd3 JH |
177 | fprintf(new, "# define TIME_T_FMT \"%%lld\"\n"); |
178 | fprintf(new, "# undef LONGLONG_T\n"); | |
179 | fprintf(new, "# define LONGLONG_T long long int\n"); | |
c6c2dc1d PH |
180 | } |
181 | else | |
bb07bcd3 JH |
182 | fprintf(new, "# define TIME_T_FMT \"%%ld\"\n"); |
183 | fprintf(new, "#endif\n\n"); | |
184 | ||
185 | fprintf(new, "#ifndef INO_T_FMT\n"); | |
186 | if (sizeof(test_ino_t) > sizeof(test_long_t)) | |
187 | fprintf(new, "# define INO_T_FMT \"%%llu\"\n"); | |
188 | else | |
189 | fprintf(new, "# define INO_T_FMT \"%%lu\"\n"); | |
190 | fprintf(new, "#endif\n\n"); | |
191 | ||
192 | fprintf(new, "#ifndef PID_T_FMT\n"); | |
193 | fprintf(new, "# define PID_T_FMT \"%%lu\"\n"); | |
b1c749bb PH |
194 | fprintf(new, "#endif\n\n"); |
195 | ||
73a46702 | 196 | /* And for sizeof() results, size_t, which should with C99 be just %zu, deal |
17c76198 PP |
197 | with C99 not being ubiquitous yet. Unfortunately. Assume ssize_t is same |
198 | size as size_t on C99; if someone comes up with a version where it's not, fix | |
199 | it then. */ | |
73a46702 PP |
200 | |
201 | #if __STDC_VERSION__ >= 199901L | |
202 | fprintf(new, "#define SIZE_T_FMT \"%%zu\"\n"); | |
17c76198 | 203 | fprintf(new, "#define SSIZE_T_FMT \"%%zd\"\n"); |
73a46702 | 204 | #else |
73a46702 PP |
205 | if (sizeof(test_size_t) > sizeof (test_ulong_t)) |
206 | fprintf(new, "#define SIZE_T_FMT \"%%llu\"\n"); | |
74d8288d | 207 | else if (sizeof(test_size_t) > sizeof (test_uint_t)) |
73a46702 | 208 | fprintf(new, "#define SIZE_T_FMT \"%%lu\"\n"); |
74d8288d JH |
209 | else |
210 | fprintf(new, "#define SIZE_T_FMT \"%%u\"\n"); | |
211 | ||
17c76198 PP |
212 | if (sizeof(test_ssize_t) > sizeof(test_long_t)) |
213 | fprintf(new, "#define SSIZE_T_FMT \"%%lld\"\n"); | |
74d8288d | 214 | else if (sizeof(test_ssize_t) > sizeof(test_int_t)) |
17c76198 | 215 | fprintf(new, "#define SSIZE_T_FMT \"%%ld\"\n"); |
74d8288d JH |
216 | else |
217 | fprintf(new, "#define SSIZE_T_FMT \"%%d\"\n"); | |
73a46702 PP |
218 | #endif |
219 | ||
b1c749bb | 220 | /* Now search the makefile for certain settings */ |
059ec3d9 PH |
221 | |
222 | base = fopen("Makefile", "rb"); | |
223 | if (base == NULL) | |
224 | { | |
225 | printf("*** Buildconfig: failed to open Makefile\n"); | |
f1e894f3 | 226 | (void)fclose(new); |
059ec3d9 PH |
227 | exit(1); |
228 | } | |
229 | ||
230 | errno_quota[0] = 0; /* no over-riding value set */ | |
231 | ostype[0] = 0; /* just in case */ | |
232 | cc[0] = 0; | |
233 | ||
234 | while (fgets(buffer, sizeof(buffer), base) != NULL) | |
235 | { | |
236 | int i; | |
237 | have_item *h; | |
238 | save_item *s; | |
239 | char *p = buffer + (int)strlen(buffer); | |
240 | linecount++; | |
241 | while (p > buffer && isspace((unsigned char)p[-1])) p--; | |
242 | *p = 0; | |
243 | p = buffer; | |
244 | while (isspace((unsigned char)*p)) p++; | |
245 | ||
246 | /* Notice when we hit the user's makefile */ | |
247 | ||
248 | if (strcmp(p, "# From Local/Makefile") == 0) | |
249 | { | |
250 | in_local_makefile = 1; | |
251 | continue; | |
252 | } | |
253 | ||
254 | /* Remember the last DB option setting. If we hit two in the user's | |
255 | Makefile, complain. */ | |
256 | ||
257 | for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++) | |
258 | { | |
259 | int len = (int)strlen(db_opts[i]); | |
260 | if (strncmp(p, db_opts[i], len) == 0 && (p[len] == ' ' || p[len] == '=')) | |
261 | { | |
262 | if (in_local_makefile) | |
263 | { | |
264 | if (use_which_db_in_local_makefile) | |
265 | { | |
266 | printf("*** Only one of USE_DB, USE_GDBM, or USE_TDB should be " | |
267 | "defined in Local/Makefile\n"); | |
268 | exit(1); | |
269 | } | |
270 | use_which_db_in_local_makefile = 1; | |
271 | } | |
272 | use_which_db = i; | |
273 | break; | |
274 | } | |
275 | } | |
276 | if (i < sizeof(db_opts)/sizeof(char *)) continue; | |
277 | ||
278 | /* Items where we just save a boolean */ | |
279 | ||
280 | for (h = have_list; h->name != NULL; h++) | |
281 | { | |
282 | int len = (int)strlen(h->name); | |
283 | if (strncmp(p, h->name, len) == 0) | |
284 | { | |
285 | p += len; | |
286 | while (isspace((unsigned char)*p)) p++; | |
287 | if (*p++ != '=') | |
288 | { | |
289 | printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount); | |
290 | exit(1); | |
291 | } | |
292 | while (isspace((unsigned char)*p)) p++; | |
293 | if (strcmp(p, "YES") == 0 || strcmp(p, "yes") == 0) *(h->flag) = 1; | |
294 | else *(h->flag) = 0; /* Must reset in case multiple instances */ | |
295 | break; | |
296 | } | |
297 | } | |
298 | ||
299 | if (h->name != NULL) continue; | |
300 | ||
301 | /* Items where we save the complete string */ | |
302 | ||
303 | for (s = save_list; s->name != NULL; s++) | |
304 | { | |
305 | int len = (int)strlen(s->name); | |
306 | if (strncmp(p, s->name, len) == 0) | |
307 | { | |
308 | p += len; | |
309 | while (isspace((unsigned char)*p)) p++; | |
310 | if (*p++ != '=') | |
311 | { | |
312 | printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount); | |
313 | exit(1); | |
314 | } | |
315 | while (isspace((unsigned char)*p)) p++; | |
316 | strcpy(s->data, p); | |
317 | } | |
318 | } | |
319 | } | |
320 | ||
321 | fprintf(new, "#define HAVE_IPV6 %s\n", | |
322 | have_ipv6? "TRUE" : "FALSE"); | |
323 | ||
324 | fprintf(new, "#define HAVE_ICONV %s\n", | |
325 | have_iconv? "TRUE" : "FALSE"); | |
326 | ||
327 | if (errno_quota[0] != 0) | |
328 | fprintf(new, "\n#define ERRNO_QUOTA %s\n", errno_quota); | |
329 | ||
2548ba04 PH |
330 | if (strcmp(cc, "gcc") == 0 && |
331 | (strstr(ostype, "IRIX") != NULL || strstr(ostype, "AIX") != NULL)) | |
059ec3d9 PH |
332 | { |
333 | fprintf(new, "\n/* This switch includes the code to fix the inet_ntoa() */"); | |
2548ba04 | 334 | fprintf(new, "\n/* bug when using gcc on an IRIX or AIX system. */"); |
059ec3d9 PH |
335 | fprintf(new, "\n#define USE_INET_NTOA_FIX"); |
336 | } | |
337 | ||
338 | fprintf(new, "\n"); | |
f1e894f3 | 339 | (void)fclose(base); |
059ec3d9 PH |
340 | |
341 | ||
342 | /* Now handle the macros listed in the defaults */ | |
343 | ||
344 | base = fopen("../src/config.h.defaults", "rb"); | |
345 | if (base == NULL) | |
346 | { | |
347 | printf("*** Buildconfig: failed to open ../src/config.h.defaults\n"); | |
f1e894f3 | 348 | (void)fclose(new); |
059ec3d9 PH |
349 | exit(1); |
350 | } | |
351 | ||
352 | while (fgets(buffer, sizeof(buffer), base) != NULL) | |
353 | { | |
354 | int i; | |
355 | char name[256]; | |
356 | char *value; | |
357 | char *p = buffer; | |
358 | char *q = name; | |
359 | ||
360 | while (*p == ' ' || *p == '\t') p++; | |
361 | ||
97d17305 JH |
362 | if (strncmp(p, "#ifdef ", 7) == 0 |
363 | || strncmp(p, "#ifndef ", 8) == 0 | |
364 | || strncmp(p, "#if ", 4) == 0 | |
365 | || strncmp(p, "#endif", 6) == 0 | |
366 | ) | |
367 | { | |
368 | fputs(buffer, new); | |
369 | continue; | |
370 | } | |
371 | ||
059ec3d9 PH |
372 | if (strncmp(p, "#define ", 8) != 0) continue; |
373 | ||
374 | p += 8; | |
375 | while (*p == ' ' || *p == '\t') p++; | |
376 | ||
377 | if (*p < last_initial) fprintf(new, "\n"); | |
378 | last_initial = *p; | |
379 | ||
380 | while (*p && (isalnum((unsigned char)*p) || *p == '_')) *q++ = *p++; | |
381 | *q = 0; | |
382 | ||
383 | /* USE_DB, USE_GDBM, and USE_TDB are special cases. We want to have only | |
384 | one of them set. The scan of the Makefile has saved which was the last one | |
385 | encountered. */ | |
386 | ||
387 | for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++) | |
388 | { | |
389 | if (strcmp(name, db_opts[i]) == 0) | |
390 | { | |
391 | if (use_which_db == i) | |
392 | fprintf(new, "#define %s %.*syes\n", db_opts[i], | |
393 | 21 - (int)strlen(db_opts[i]), " "); | |
394 | else | |
395 | fprintf(new, "/* %s not set */\n", name); | |
396 | break; | |
397 | } | |
398 | } | |
399 | if (i < sizeof(db_opts)/sizeof(char *)) continue; | |
400 | ||
401 | /* EXIM_USER is a special case. We look in the environment for EXIM_USER or | |
402 | EXIM_UID (the latter for backward compatibility with Exim 3). If the value is | |
403 | not numeric, we look up the user, and default the GID if found. Otherwise, | |
404 | EXIM_GROUP or EXIM_GID must be in the environment. */ | |
405 | ||
406 | if (strcmp(name, "EXIM_UID") == 0) | |
407 | { | |
408 | uid_t uid = 0; | |
409 | gid_t gid = 0; | |
410 | int gid_set = 0; | |
10385c15 | 411 | int uid_not_set = 0; |
059ec3d9 PH |
412 | char *username = NULL; |
413 | char *groupname = NULL; | |
414 | char *s; | |
415 | char *user = getenv("EXIM_USER"); | |
416 | char *group = getenv("EXIM_GROUP"); | |
417 | ||
418 | if (user == NULL) user = getenv("EXIM_UID"); | |
419 | if (group == NULL) group = getenv("EXIM_GID"); | |
420 | ||
421 | if (user == NULL) | |
422 | { | |
423 | printf("\n*** EXIM_USER has not been defined in any of the Makefiles in " | |
424 | "the\n \"Local\" directory. Please review your build-time " | |
425 | "configuration.\n\n"); | |
426 | return 1; | |
427 | } | |
428 | ||
429 | while (isspace((unsigned char)(*user))) user++; | |
430 | if (*user == 0) | |
431 | { | |
432 | printf("\n*** EXIM_USER is defined as an empty string in one of the " | |
433 | "files\n in the \"Local\" directory. Please review your build-time" | |
434 | "\n configuration.\n\n"); | |
435 | return 1; | |
436 | } | |
437 | ||
438 | for (s = user; *s != 0; s++) | |
439 | { | |
440 | if (iscntrl((unsigned char)(*s))) | |
441 | { | |
442 | printf("\n*** EXIM_USER contains the control character 0x%02X in one " | |
443 | "of the files\n in the \"Local\" directory. Please review your " | |
444 | "build-time\n configuration.\n\n", *s); | |
445 | return 1; | |
446 | } | |
447 | } | |
448 | ||
449 | /* Numeric uid given */ | |
450 | ||
451 | if (user[strspn(user, "0123456789")] == 0) | |
452 | { | |
453 | uid = (uid_t)atoi(user); | |
454 | } | |
455 | ||
456 | /* User name given. Normally, we look up the uid right away. However, | |
457 | people building binary distributions sometimes want to retain the name till | |
458 | runtime. This is supported if the name begins "ref:". */ | |
459 | ||
460 | else if (strncmp(user, "ref:", 4) == 0) | |
461 | { | |
462 | user += 4; | |
463 | while (isspace(*user)) user++; | |
464 | username = user; | |
465 | gid_set = 1; | |
10385c15 | 466 | uid_not_set = 1; |
059ec3d9 PH |
467 | } |
468 | ||
469 | else | |
470 | { | |
471 | struct passwd *pw = getpwnam(user); | |
472 | if (pw == NULL) | |
473 | { | |
474 | printf("\n*** User \"%s\" (specified in one of the Makefiles) does not " | |
475 | "exist.\n Please review your build-time configuration.\n\n", | |
476 | user); | |
477 | return 1; | |
478 | } | |
479 | ||
480 | uid = pw->pw_uid; | |
481 | gid = pw->pw_gid; | |
482 | gid_set = 1; | |
483 | } | |
484 | ||
485 | /* Use explicit group if set. */ | |
486 | ||
487 | if (group != NULL) | |
488 | { | |
489 | while (isspace((unsigned char)(*group))) group++; | |
490 | if (*group == 0) | |
491 | { | |
492 | printf("\n*** EXIM_GROUP is defined as an empty string in one of " | |
493 | "the files in the\n \"Local\" directory. "); | |
494 | if (gid_set) | |
495 | { | |
496 | printf("If you want the Exim group to be taken from the\n " | |
497 | "password data for the Exim user, just remove the EXIM_GROUP " | |
498 | "setting.\n Otherwise, p"); | |
499 | } | |
500 | else printf("EXIM_USER is defined numerically, so there is no" | |
501 | "\n default for EXIM_GROUP and you must set it explicitly.\n P"); | |
502 | printf("lease review your build-time configuration.\n\n"); | |
503 | return 1; | |
504 | } | |
505 | ||
506 | for (s = group; *s != 0; s++) | |
507 | { | |
508 | if (iscntrl((unsigned char)(*s))) | |
509 | { | |
510 | printf("\n*** EXIM_GROUP contains the control character 0x%02X in one " | |
511 | "of the files\n in the \"Local\" directory. Please review your " | |
512 | "build-time\n configuration.\n\n", *s); | |
513 | return 1; | |
514 | } | |
515 | } | |
516 | ||
517 | /* Group name given. This may be by reference or to be looked up now, | |
518 | as for user. */ | |
519 | ||
520 | if (strncmp(group, "ref:", 4) == 0) | |
521 | { | |
522 | group += 4; | |
523 | while (isspace(*group)) group++; | |
524 | groupname = group; | |
525 | } | |
526 | ||
527 | else if (username != NULL) | |
528 | { | |
529 | groupname = group; | |
530 | } | |
531 | ||
532 | else if (group[strspn(group, "0123456789")] == 0) | |
533 | { | |
534 | gid = (gid_t)atoi(group); | |
535 | } | |
536 | ||
537 | else | |
538 | { | |
539 | struct group *gr = getgrnam(group); | |
540 | if (gr == NULL) | |
541 | { | |
542 | printf("\n*** Group \"%s\" (specified in one of the Makefiles) does " | |
543 | "not exist.\n Please review your build-time configuration.\n\n", | |
544 | group); | |
545 | return 1; | |
546 | } | |
547 | gid = gr->gr_gid; | |
548 | } | |
549 | } | |
550 | ||
551 | /* Else trouble unless found in passwd file with user */ | |
552 | ||
553 | else if (!gid_set) | |
554 | { | |
555 | printf("\n*** No group set for Exim. Please review your build-time " | |
556 | "configuration.\n\n"); | |
557 | return 1; | |
558 | } | |
559 | ||
10385c15 PP |
560 | /* security sanity checks |
561 | if ref: is being used, we can never be sure, but we can take reasonable | |
562 | steps to filter out the most obvious ones. */ | |
563 | ||
564 | if ((!uid_not_set && uid == 0) || | |
655c5895 PP |
565 | ((username != NULL) && ( |
566 | (strcmp(username, "root") == 0) || | |
567 | (strcmp(username, "toor") == 0) ))) | |
10385c15 PP |
568 | { |
569 | printf("\n*** Exim's internal user must not be root.\n\n"); | |
570 | return 1; | |
571 | } | |
572 | ||
059ec3d9 PH |
573 | /* Output user and group names or uid/gid. When names are set, uid/gid |
574 | are set to zero but will be replaced at runtime. */ | |
575 | ||
576 | if (username != NULL) | |
577 | fprintf(new, "#define EXIM_USERNAME \"%s\"\n", username); | |
578 | if (groupname != NULL) | |
579 | fprintf(new, "#define EXIM_GROUPNAME \"%s\"\n", groupname); | |
580 | ||
581 | fprintf(new, "#define EXIM_UID %d\n", (int)uid); | |
582 | fprintf(new, "#define EXIM_GID %d\n", (int)gid); | |
583 | continue; | |
584 | } | |
585 | ||
35edf2ff PH |
586 | /* CONFIGURE_OWNER and CONFIGURE_GROUP are special cases. We look in the |
587 | environment for first. If the value is not numeric, we look up the user or | |
588 | group. A lot of this code is similar to that for EXIM_USER, but it's easier | |
589 | to keep it separate. */ | |
059ec3d9 | 590 | |
35edf2ff PH |
591 | if (strcmp(name, "CONFIGURE_OWNER") == 0 || |
592 | strcmp(name, "CONFIGURE_GROUP") == 0) | |
059ec3d9 | 593 | { |
8e669ac1 | 594 | int isgroup = name[10] == 'G'; |
059ec3d9 | 595 | uid_t uid = 0; |
8e669ac1 | 596 | gid_t gid = 0; |
1ba28e2b PP |
597 | const char *s; |
598 | const char *username = NULL; | |
599 | const char *user = getenv(name); | |
059ec3d9 PH |
600 | |
601 | if (user == NULL) user = ""; | |
602 | while (isspace((unsigned char)(*user))) user++; | |
603 | if (*user == 0) | |
604 | { | |
605 | fprintf(new, "/* %s not set */\n", name); | |
606 | continue; | |
607 | } | |
608 | ||
609 | for (s = user; *s != 0; s++) | |
610 | { | |
611 | if (iscntrl((unsigned char)(*s))) | |
612 | { | |
35edf2ff | 613 | printf("\n*** %s contains the control character 0x%02X in " |
059ec3d9 | 614 | "one of the files\n in the \"Local\" directory. Please review " |
35edf2ff | 615 | "your build-time\n configuration.\n\n", name, *s); |
059ec3d9 PH |
616 | return 1; |
617 | } | |
618 | } | |
619 | ||
620 | /* Numeric uid given */ | |
621 | ||
622 | if (user[strspn(user, "0123456789")] == 0) | |
623 | { | |
35edf2ff PH |
624 | if (isgroup) |
625 | gid = (gid_t)atoi(user); | |
8e669ac1 | 626 | else |
35edf2ff | 627 | uid = (uid_t)atoi(user); |
059ec3d9 PH |
628 | } |
629 | ||
35edf2ff | 630 | /* Name given. Normally, we look up the uid or gid right away. However, |
059ec3d9 PH |
631 | people building binary distributions sometimes want to retain the name till |
632 | runtime. This is supported if the name begins "ref:". */ | |
633 | ||
634 | else if (strncmp(user, "ref:", 4) == 0) | |
635 | { | |
636 | user += 4; | |
637 | while (isspace(*user)) user++; | |
638 | username = user; | |
639 | } | |
1ba28e2b | 640 | else if (isgroup) |
35edf2ff PH |
641 | { |
642 | struct group *gr = getgrnam(user); | |
643 | if (gr == NULL) | |
644 | { | |
645 | printf("\n*** Group \"%s\" (specified in one of the Makefiles) does not " | |
646 | "exist.\n Please review your build-time configuration.\n\n", | |
647 | user); | |
648 | return 1; | |
649 | } | |
650 | gid = gr->gr_gid; | |
651 | } | |
652 | ||
059ec3d9 PH |
653 | else |
654 | { | |
655 | struct passwd *pw = getpwnam(user); | |
656 | if (pw == NULL) | |
657 | { | |
658 | printf("\n*** User \"%s\" (specified in one of the Makefiles) does not " | |
659 | "exist.\n Please review your build-time configuration.\n\n", | |
660 | user); | |
661 | return 1; | |
662 | } | |
059ec3d9 PH |
663 | uid = pw->pw_uid; |
664 | } | |
665 | ||
666 | /* Output user and group names or uid/gid. When names are set, uid/gid | |
667 | are set to zero but will be replaced at runtime. */ | |
668 | ||
669 | if (username != NULL) | |
35edf2ff PH |
670 | { |
671 | if (isgroup) | |
672 | fprintf(new, "#define CONFIGURE_GROUPNAME \"%s\"\n", username); | |
8e669ac1 | 673 | else |
35edf2ff PH |
674 | fprintf(new, "#define CONFIGURE_OWNERNAME \"%s\"\n", username); |
675 | } | |
8e669ac1 | 676 | |
35edf2ff PH |
677 | if (isgroup) |
678 | fprintf(new, "#define CONFIGURE_GROUP %d\n", (int)gid); | |
8e669ac1 | 679 | else |
35edf2ff | 680 | fprintf(new, "#define CONFIGURE_OWNER %d\n", (int)uid); |
059ec3d9 PH |
681 | continue; |
682 | } | |
683 | ||
684 | /* FIXED_NEVER_USERS is another special case. Look up the uid values and | |
685 | create suitable initialization data for a vector. */ | |
686 | ||
687 | if (strcmp(name, "FIXED_NEVER_USERS") == 0) | |
688 | { | |
689 | char *list = getenv("FIXED_NEVER_USERS"); | |
690 | if (list == NULL) | |
691 | { | |
692 | fprintf(new, "#define FIXED_NEVER_USERS 0\n"); | |
693 | } | |
694 | else | |
695 | { | |
696 | int count = 1; | |
926e1192 | 697 | int i, j; |
059ec3d9 PH |
698 | uid_t *vector; |
699 | char *p = list; | |
700 | while (*p != 0) if (*p++ == ':') count++; | |
701 | ||
702 | vector = malloc((count+1) * sizeof(uid_t)); | |
703 | vector[0] = (uid_t)count; | |
704 | ||
926e1192 | 705 | for (i = 1, j = 0; i <= count; list++, i++) |
059ec3d9 PH |
706 | { |
707 | char name[64]; | |
8e669ac1 | 708 | |
059ec3d9 PH |
709 | p = list; |
710 | while (*list != 0 && *list != ':') list++; | |
711 | strncpy(name, p, list-p); | |
712 | name[list-p] = 0; | |
8e669ac1 | 713 | |
926e1192 PH |
714 | if (name[0] == 0) |
715 | { | |
8e669ac1 PH |
716 | continue; |
717 | } | |
926e1192 | 718 | else if (name[strspn(name, "0123456789")] == 0) |
059ec3d9 | 719 | { |
926e1192 | 720 | vector[j++] = (uid_t)atoi(name); |
059ec3d9 PH |
721 | } |
722 | else | |
723 | { | |
724 | struct passwd *pw = getpwnam(name); | |
725 | if (pw == NULL) | |
726 | { | |
727 | printf("\n*** User \"%s\" (specified for FIXED_NEVER_USERS in one of the Makefiles) does not " | |
728 | "exist.\n Please review your build-time configuration.\n\n", | |
729 | name); | |
730 | return 1; | |
731 | } | |
926e1192 | 732 | vector[j++] = pw->pw_uid; |
059ec3d9 PH |
733 | } |
734 | } | |
926e1192 PH |
735 | fprintf(new, "#define FIXED_NEVER_USERS %d", j); |
736 | for (i = 0; i < j; i++) fprintf(new, ", %d", (unsigned int)vector[i]); | |
737 | fprintf(new, "\n"); | |
7cc29763 | 738 | free(vector); |
059ec3d9 PH |
739 | } |
740 | continue; | |
741 | } | |
742 | ||
6f1b3e5d JH |
743 | /* WITH_CONTENT_SCAN is another special case: it must be set if it or |
744 | EXPERIMENTAL_DCC is set. */ | |
c6e692d7 PH |
745 | |
746 | if (strcmp(name, "WITH_CONTENT_SCAN") == 0) | |
747 | { | |
748 | char *wcs = getenv("WITH_CONTENT_SCAN"); | |
6a8f9482 | 749 | char *dcc = getenv("EXPERIMENTAL_DCC"); |
03d5892b JH |
750 | fprintf(new, wcs || dcc |
751 | ? "#define WITH_CONTENT_SCAN yes\n" | |
752 | : "/* WITH_CONTENT_SCAN not set */\n"); | |
c6e692d7 | 753 | continue; |
8e669ac1 | 754 | } |
c6e692d7 | 755 | |
01603eec | 756 | /* DISABLE_DKIM is special; must be forced if DISABLE_TLS */ |
f444c2c7 JH |
757 | if (strcmp(name, "DISABLE_DKIM") == 0) |
758 | { | |
759 | char *d_dkim = getenv("DISABLE_DKIM"); | |
01603eec | 760 | char *notls = getenv("DISABLE_TLS"); |
f444c2c7 JH |
761 | |
762 | if (d_dkim) | |
763 | fprintf(new, "#define DISABLE_DKIM yes\n"); | |
01603eec | 764 | else if (notls) |
f444c2c7 JH |
765 | fprintf(new, "#define DISABLE_DKIM yes /* forced by lack of TLS */\n"); |
766 | else | |
767 | fprintf(new, "/* DISABLE_DKIM not set */\n"); | |
768 | continue; | |
769 | } | |
770 | ||
059ec3d9 PH |
771 | /* Otherwise, check whether a value exists in the environment. Remember if |
772 | it is an AUTH setting or SUPPORT_CRYPTEQ. */ | |
773 | ||
774 | if ((value = getenv(name)) != NULL) | |
775 | { | |
776 | int len; | |
777 | len = 21 - (int)strlen(name); | |
778 | ||
779 | if (strncmp(name, "AUTH_", 5) == 0) have_auth = 1; | |
780 | if (strncmp(name, "SUPPORT_CRYPTEQ", 15) == 0) support_crypteq = 1; | |
781 | ||
782 | /* The text value of LDAP_LIB_TYPE refers to a macro that gets set. */ | |
783 | ||
784 | if (strcmp(name, "LDAP_LIB_TYPE") == 0) | |
785 | { | |
786 | if (strcmp(value, "NETSCAPE") == 0 || | |
787 | strcmp(value, "UMICHIGAN") == 0 || | |
788 | strcmp(value, "OPENLDAP1") == 0 || | |
789 | strcmp(value, "OPENLDAP2") == 0 || | |
790 | strcmp(value, "SOLARIS") == 0 || | |
791 | strcmp(value, "SOLARIS7") == 0) /* Compatibility */ | |
792 | { | |
793 | fprintf(new, "#define LDAP_LIB_%s\n", value); | |
794 | } | |
795 | else | |
796 | { | |
797 | printf("\n*** LDAP_LIB_TYPE=%s is not a recognized LDAP library type." | |
798 | "\n*** Please review your build-time configuration.\n\n", value); | |
799 | return 1; | |
800 | } | |
801 | } | |
802 | ||
803 | else if (strcmp(name, "RADIUS_LIB_TYPE") == 0) | |
804 | { | |
805 | if (strcmp(value, "RADIUSCLIENT") == 0 || | |
7766a4f0 | 806 | strcmp(value, "RADIUSCLIENTNEW") == 0 || |
059ec3d9 PH |
807 | strcmp(value, "RADLIB") == 0) |
808 | { | |
809 | fprintf(new, "#define RADIUS_LIB_%s\n", value); | |
810 | } | |
811 | else | |
812 | { | |
813 | printf("\n*** RADIUS_LIB_TYPE=%s is not a recognized RADIUS library type." | |
814 | "\n*** Please review your build-time configuration.\n\n", value); | |
815 | return 1; | |
816 | } | |
817 | } | |
818 | ||
819 | /* Other macros get set to the environment value. */ | |
820 | ||
821 | else | |
822 | { | |
823 | fprintf(new, "#define %s ", name); | |
824 | while(len-- > 0) fputc(' ', new); | |
825 | ||
826 | /* LOG_FILE_PATH is now messy because it can be a path containing %s or | |
827 | it can be "syslog" or ":syslog" or "syslog:path" or even "path:syslog". */ | |
828 | ||
829 | if (strcmp(name, "LOG_FILE_PATH") == 0) | |
830 | { | |
831 | char *ss = value; | |
832 | for(;;) | |
833 | { | |
834 | char *pp; | |
835 | char *sss = strchr(ss, ':'); | |
836 | if (sss != NULL) | |
837 | { | |
838 | strncpy(buffer, ss, sss-ss); | |
839 | buffer[sss-ss] = 0; /* For empty case */ | |
840 | } | |
ae20c809 JH |
841 | else |
842 | { | |
843 | strncpy(buffer, ss, sizeof(buffer)); | |
844 | buffer[sizeof(buffer)-1] = 0; | |
845 | } | |
059ec3d9 PH |
846 | pp = buffer + (int)strlen(buffer); |
847 | while (pp > buffer && isspace((unsigned char)pp[-1])) pp--; | |
848 | *pp = 0; | |
849 | if (buffer[0] != 0 && strcmp(buffer, "syslog") != 0) | |
850 | check_percent_ess(buffer, name); | |
851 | if (sss == NULL) break; | |
852 | ss = sss + 1; | |
853 | while (isspace((unsigned char)*ss)) ss++; | |
854 | } | |
855 | fprintf(new, "\"%s\"\n", value); | |
856 | } | |
857 | ||
a7cbbf50 PP |
858 | /* Timezone values HEADERS_CHARSET, TCP_WRAPPERS_DAEMON_NAME and |
859 | WHITELIST_D_MACROS get quoted */ | |
059ec3d9 PH |
860 | |
861 | else if (strcmp(name, "TIMEZONE_DEFAULT") == 0|| | |
5dc43717 | 862 | strcmp(name, "TCP_WRAPPERS_DAEMON_NAME") == 0|| |
a7cbbf50 | 863 | strcmp(name, "HEADERS_CHARSET") == 0|| |
2c17bb02 | 864 | strcmp(name, "WHITELIST_D_MACROS") == 0) |
059ec3d9 PH |
865 | fprintf(new, "\"%s\"\n", value); |
866 | ||
2c17bb02 PP |
867 | /* GnuTLS constants; first is for debugging, others are tuning */ |
868 | ||
869 | /* less than 0 is not-active; 0-9 are normal, API suggests higher | |
870 | taken without problems */ | |
871 | else if (strcmp(name, "EXIM_GNUTLS_LIBRARY_LOG_LEVEL") == 0) | |
872 | { | |
873 | long nv; | |
874 | char *end; | |
875 | nv = strtol(value, &end, 10); | |
876 | if (end != value && *end == '\0' && nv >= -1 && nv <= 100) | |
877 | { | |
878 | fprintf(new, "%s\n", value); | |
879 | } | |
880 | else | |
881 | { | |
882 | printf("Value of %s should be -1..9\n", name); | |
883 | return 1; | |
884 | } | |
885 | } | |
886 | ||
887 | /* how many bits Exim, as a client, demands must be in D-H */ | |
54c90be1 PP |
888 | /* 1024 is a historical figure; some sites actually use lower, so we |
889 | permit the value to be lowered "dangerously" low, but not "insanely" | |
890 | low. Though actually, 1024 is becoming "dangerous". */ | |
891 | else if ((strcmp(name, "EXIM_CLIENT_DH_MIN_MIN_BITS") == 0) || | |
892 | (strcmp(name, "EXIM_CLIENT_DH_DEFAULT_MIN_BITS") == 0) || | |
2c17bb02 PP |
893 | (strcmp(name, "EXIM_SERVER_DH_BITS_PRE2_12") == 0)) |
894 | { | |
895 | long nv; | |
896 | char *end; | |
897 | nv = strtol(value, &end, 10); | |
54c90be1 | 898 | if (end != value && *end == '\0' && nv >= 512 && nv < 500000) |
2c17bb02 PP |
899 | { |
900 | fprintf(new, "%s\n", value); | |
901 | } | |
902 | else | |
903 | { | |
904 | printf("Unreasonable value (%s) of \"%s\".\n", value, name); | |
905 | return 1; | |
906 | } | |
907 | } | |
908 | ||
059ec3d9 PH |
909 | /* For others, quote any paths and don't quote anything else */ |
910 | ||
911 | else | |
912 | { | |
913 | if (value[0] == '/') fprintf(new, "\"%s\"\n", value); | |
914 | else fprintf(new, "%s\n", value); | |
915 | } | |
916 | } | |
917 | } | |
918 | ||
919 | /* Value not defined in the environment; use the default */ | |
920 | ||
921 | else | |
922 | { | |
923 | char *t = p; | |
924 | while (*p == ' ' || *p == '\t') p++; | |
925 | if (*p != '\n') fputs(buffer, new); else | |
926 | { | |
927 | *t = 0; | |
928 | if (strcmp(name, "BIN_DIRECTORY") == 0 || | |
929 | strcmp(name, "CONFIGURE_FILE") == 0) | |
930 | { | |
931 | printf("\n*** %s has not been defined in any of the Makefiles in the\n" | |
932 | " \"Local\" directory. " | |
933 | "Please review your build-time configuration.\n\n", name); | |
934 | return 1; | |
935 | } | |
936 | ||
937 | if (strcmp(name, "TIMEZONE_DEFAULT") == 0) | |
938 | { | |
939 | char *tz = getenv("TZ"); | |
940 | fprintf(new, "#define TIMEZONE_DEFAULT "); | |
941 | if (tz == NULL) fprintf(new, "NULL\n"); else | |
942 | fprintf(new, "\"%s\"\n", tz); | |
943 | } | |
944 | ||
945 | else fprintf(new, "/* %s not set */\n", name); | |
946 | } | |
947 | } | |
948 | } | |
949 | ||
f1e894f3 | 950 | (void)fclose(base); |
059ec3d9 PH |
951 | |
952 | /* If any AUTH macros were defined, ensure that SUPPORT_CRYPTEQ is also | |
953 | defined. */ | |
954 | ||
955 | if (have_auth) | |
059ec3d9 PH |
956 | if (!support_crypteq) fprintf(new, "/* Force SUPPORT_CRYPTEQ for AUTH */\n" |
957 | "#define SUPPORT_CRYPTEQ\n"); | |
059ec3d9 | 958 | |
02c30a32 JH |
959 | /* Check poll() for timer functionality. |
960 | Some OS' have released with it broken. */ | |
961 | ||
962 | { | |
963 | struct timeval before, after; | |
02c30a32 JH |
964 | size_t us; |
965 | ||
966 | gettimeofday(&before, NULL); | |
ed2b3ee0 | 967 | (void) poll(NULL, 0, 500); |
02c30a32 JH |
968 | gettimeofday(&after, NULL); |
969 | ||
970 | us = (after.tv_sec - before.tv_sec) * 1000000 + | |
971 | (after.tv_usec - before.tv_usec); | |
972 | ||
973 | if (us < 400000) | |
974 | fprintf(new, "#define NO_POLL_H\n"); | |
975 | } | |
976 | ||
059ec3d9 PH |
977 | /* End off */ |
978 | ||
979 | fprintf(new, "\n/* End of config.h */\n"); | |
f1e894f3 | 980 | (void)fclose(new); |
059ec3d9 PH |
981 | return 0; |
982 | } | |
983 | ||
984 | /* End of buildconfig.c */ |