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; |
26dd3aa0 | 114 | long long test_longlong_t = 0; |
74d8288d | 115 | int test_int_t = 0; |
059ec3d9 PH |
116 | FILE *base; |
117 | FILE *new; | |
118 | int last_initial = 'A'; | |
119 | int linecount = 0; | |
120 | int have_auth = 0; | |
121 | int in_local_makefile = 0; | |
122 | int use_which_db = 0; | |
123 | int use_which_db_in_local_makefile = 0; | |
124 | int support_crypteq = 0; | |
125 | char buffer[1024]; | |
126 | ||
127 | if (argc != 1) | |
128 | { | |
129 | printf("*** Buildconfig: called with incorrect arguments\n"); | |
130 | exit(1); | |
131 | } | |
132 | ||
133 | new = fopen("config.h", "wb"); | |
134 | if (new == NULL) | |
135 | { | |
136 | printf("*** Buildconfig: failed to open config.h for output\n"); | |
137 | exit(1); | |
138 | } | |
139 | ||
140 | printf("Building configuration file config.h\n"); | |
141 | ||
142 | fprintf(new, "/*************************************************\n"); | |
143 | fprintf(new, "* Configuration header for Exim *\n"); | |
144 | fprintf(new, "*************************************************/\n\n"); | |
145 | ||
146 | fprintf(new, "/* This file was automatically generated from Makefile and " | |
147 | "config.h.defaults,\n"); | |
148 | fprintf(new, "using values specified in the configuration file Local/Makefile.\n"); | |
149 | fprintf(new, "Do not edit it. Instead, edit Local/Makefile and " | |
150 | "rerun make. */\n\n"); | |
151 | ||
b1c749bb PH |
152 | /* First, deal with the printing format for off_t variables. We assume that if |
153 | the size of off_t is greater than 4, "%lld" will be available as a format for | |
154 | printing long long variables, and there will be support for the long long type. | |
155 | This assumption is known to be OK for the common operating systems. */ | |
156 | ||
157 | fprintf(new, "#ifndef OFF_T_FMT\n"); | |
73a46702 | 158 | if (sizeof(test_off_t) > sizeof(test_long_t)) |
bb07bcd3 | 159 | fprintf(new, "# define OFF_T_FMT \"%%lld\"\n"); |
b1c749bb | 160 | else |
bb07bcd3 | 161 | fprintf(new, "# define OFF_T_FMT \"%%ld\"\n"); |
26dd3aa0 JH |
162 | fprintf(new, "#endif\n\n"); |
163 | ||
164 | fprintf(new, "#ifndef LONGLONG_T\n"); | |
165 | if (sizeof(test_longlong_t) > sizeof(test_long_t)) | |
166 | fprintf(new, "# define LONGLONG_T long long int\n"); | |
167 | else | |
bb07bcd3 | 168 | fprintf(new, "# define LONGLONG_T long int\n"); |
c6c2dc1d PH |
169 | fprintf(new, "#endif\n\n"); |
170 | ||
171 | /* Now do the same thing for time_t variables. If the length is greater than | |
172 | 4, we want to assume long long support (even if off_t was less than 4). If the | |
173 | length is 4 or less, we can leave LONGLONG_T to whatever was defined above for | |
174 | off_t. */ | |
175 | ||
176 | fprintf(new, "#ifndef TIME_T_FMT\n"); | |
73a46702 | 177 | if (sizeof(test_time_t) > sizeof(test_long_t)) |
c6c2dc1d | 178 | { |
bb07bcd3 JH |
179 | fprintf(new, "# define TIME_T_FMT \"%%lld\"\n"); |
180 | fprintf(new, "# undef LONGLONG_T\n"); | |
181 | fprintf(new, "# define LONGLONG_T long long int\n"); | |
c6c2dc1d PH |
182 | } |
183 | else | |
bb07bcd3 JH |
184 | fprintf(new, "# define TIME_T_FMT \"%%ld\"\n"); |
185 | fprintf(new, "#endif\n\n"); | |
186 | ||
187 | fprintf(new, "#ifndef INO_T_FMT\n"); | |
188 | if (sizeof(test_ino_t) > sizeof(test_long_t)) | |
189 | fprintf(new, "# define INO_T_FMT \"%%llu\"\n"); | |
190 | else | |
191 | fprintf(new, "# define INO_T_FMT \"%%lu\"\n"); | |
192 | fprintf(new, "#endif\n\n"); | |
193 | ||
194 | fprintf(new, "#ifndef PID_T_FMT\n"); | |
195 | fprintf(new, "# define PID_T_FMT \"%%lu\"\n"); | |
b1c749bb PH |
196 | fprintf(new, "#endif\n\n"); |
197 | ||
73a46702 | 198 | /* And for sizeof() results, size_t, which should with C99 be just %zu, deal |
17c76198 PP |
199 | with C99 not being ubiquitous yet. Unfortunately. Assume ssize_t is same |
200 | size as size_t on C99; if someone comes up with a version where it's not, fix | |
201 | it then. */ | |
73a46702 PP |
202 | |
203 | #if __STDC_VERSION__ >= 199901L | |
204 | fprintf(new, "#define SIZE_T_FMT \"%%zu\"\n"); | |
17c76198 | 205 | fprintf(new, "#define SSIZE_T_FMT \"%%zd\"\n"); |
73a46702 | 206 | #else |
73a46702 PP |
207 | if (sizeof(test_size_t) > sizeof (test_ulong_t)) |
208 | fprintf(new, "#define SIZE_T_FMT \"%%llu\"\n"); | |
74d8288d | 209 | else if (sizeof(test_size_t) > sizeof (test_uint_t)) |
73a46702 | 210 | fprintf(new, "#define SIZE_T_FMT \"%%lu\"\n"); |
74d8288d JH |
211 | else |
212 | fprintf(new, "#define SIZE_T_FMT \"%%u\"\n"); | |
213 | ||
17c76198 PP |
214 | if (sizeof(test_ssize_t) > sizeof(test_long_t)) |
215 | fprintf(new, "#define SSIZE_T_FMT \"%%lld\"\n"); | |
74d8288d | 216 | else if (sizeof(test_ssize_t) > sizeof(test_int_t)) |
17c76198 | 217 | fprintf(new, "#define SSIZE_T_FMT \"%%ld\"\n"); |
74d8288d JH |
218 | else |
219 | fprintf(new, "#define SSIZE_T_FMT \"%%d\"\n"); | |
73a46702 PP |
220 | #endif |
221 | ||
b1c749bb | 222 | /* Now search the makefile for certain settings */ |
059ec3d9 PH |
223 | |
224 | base = fopen("Makefile", "rb"); | |
225 | if (base == NULL) | |
226 | { | |
227 | printf("*** Buildconfig: failed to open Makefile\n"); | |
f1e894f3 | 228 | (void)fclose(new); |
059ec3d9 PH |
229 | exit(1); |
230 | } | |
231 | ||
232 | errno_quota[0] = 0; /* no over-riding value set */ | |
233 | ostype[0] = 0; /* just in case */ | |
234 | cc[0] = 0; | |
235 | ||
236 | while (fgets(buffer, sizeof(buffer), base) != NULL) | |
237 | { | |
238 | int i; | |
239 | have_item *h; | |
240 | save_item *s; | |
241 | char *p = buffer + (int)strlen(buffer); | |
242 | linecount++; | |
243 | while (p > buffer && isspace((unsigned char)p[-1])) p--; | |
244 | *p = 0; | |
245 | p = buffer; | |
246 | while (isspace((unsigned char)*p)) p++; | |
247 | ||
248 | /* Notice when we hit the user's makefile */ | |
249 | ||
250 | if (strcmp(p, "# From Local/Makefile") == 0) | |
251 | { | |
252 | in_local_makefile = 1; | |
253 | continue; | |
254 | } | |
255 | ||
256 | /* Remember the last DB option setting. If we hit two in the user's | |
257 | Makefile, complain. */ | |
258 | ||
259 | for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++) | |
260 | { | |
261 | int len = (int)strlen(db_opts[i]); | |
262 | if (strncmp(p, db_opts[i], len) == 0 && (p[len] == ' ' || p[len] == '=')) | |
263 | { | |
264 | if (in_local_makefile) | |
265 | { | |
266 | if (use_which_db_in_local_makefile) | |
267 | { | |
268 | printf("*** Only one of USE_DB, USE_GDBM, or USE_TDB should be " | |
269 | "defined in Local/Makefile\n"); | |
270 | exit(1); | |
271 | } | |
272 | use_which_db_in_local_makefile = 1; | |
273 | } | |
274 | use_which_db = i; | |
275 | break; | |
276 | } | |
277 | } | |
278 | if (i < sizeof(db_opts)/sizeof(char *)) continue; | |
279 | ||
280 | /* Items where we just save a boolean */ | |
281 | ||
282 | for (h = have_list; h->name != NULL; h++) | |
283 | { | |
284 | int len = (int)strlen(h->name); | |
285 | if (strncmp(p, h->name, len) == 0) | |
286 | { | |
287 | p += len; | |
288 | while (isspace((unsigned char)*p)) p++; | |
289 | if (*p++ != '=') | |
290 | { | |
291 | printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount); | |
292 | exit(1); | |
293 | } | |
294 | while (isspace((unsigned char)*p)) p++; | |
295 | if (strcmp(p, "YES") == 0 || strcmp(p, "yes") == 0) *(h->flag) = 1; | |
296 | else *(h->flag) = 0; /* Must reset in case multiple instances */ | |
297 | break; | |
298 | } | |
299 | } | |
300 | ||
301 | if (h->name != NULL) continue; | |
302 | ||
303 | /* Items where we save the complete string */ | |
304 | ||
305 | for (s = save_list; s->name != NULL; s++) | |
306 | { | |
307 | int len = (int)strlen(s->name); | |
308 | if (strncmp(p, s->name, len) == 0) | |
309 | { | |
310 | p += len; | |
311 | while (isspace((unsigned char)*p)) p++; | |
312 | if (*p++ != '=') | |
313 | { | |
314 | printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount); | |
315 | exit(1); | |
316 | } | |
317 | while (isspace((unsigned char)*p)) p++; | |
318 | strcpy(s->data, p); | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
323 | fprintf(new, "#define HAVE_IPV6 %s\n", | |
324 | have_ipv6? "TRUE" : "FALSE"); | |
325 | ||
326 | fprintf(new, "#define HAVE_ICONV %s\n", | |
327 | have_iconv? "TRUE" : "FALSE"); | |
328 | ||
329 | if (errno_quota[0] != 0) | |
330 | fprintf(new, "\n#define ERRNO_QUOTA %s\n", errno_quota); | |
331 | ||
2548ba04 PH |
332 | if (strcmp(cc, "gcc") == 0 && |
333 | (strstr(ostype, "IRIX") != NULL || strstr(ostype, "AIX") != NULL)) | |
059ec3d9 PH |
334 | { |
335 | fprintf(new, "\n/* This switch includes the code to fix the inet_ntoa() */"); | |
2548ba04 | 336 | fprintf(new, "\n/* bug when using gcc on an IRIX or AIX system. */"); |
059ec3d9 PH |
337 | fprintf(new, "\n#define USE_INET_NTOA_FIX"); |
338 | } | |
339 | ||
340 | fprintf(new, "\n"); | |
f1e894f3 | 341 | (void)fclose(base); |
059ec3d9 PH |
342 | |
343 | ||
344 | /* Now handle the macros listed in the defaults */ | |
345 | ||
346 | base = fopen("../src/config.h.defaults", "rb"); | |
347 | if (base == NULL) | |
348 | { | |
349 | printf("*** Buildconfig: failed to open ../src/config.h.defaults\n"); | |
f1e894f3 | 350 | (void)fclose(new); |
059ec3d9 PH |
351 | exit(1); |
352 | } | |
353 | ||
354 | while (fgets(buffer, sizeof(buffer), base) != NULL) | |
355 | { | |
356 | int i; | |
357 | char name[256]; | |
358 | char *value; | |
359 | char *p = buffer; | |
360 | char *q = name; | |
361 | ||
362 | while (*p == ' ' || *p == '\t') p++; | |
363 | ||
97d17305 JH |
364 | if (strncmp(p, "#ifdef ", 7) == 0 |
365 | || strncmp(p, "#ifndef ", 8) == 0 | |
366 | || strncmp(p, "#if ", 4) == 0 | |
367 | || strncmp(p, "#endif", 6) == 0 | |
368 | ) | |
369 | { | |
370 | fputs(buffer, new); | |
371 | continue; | |
372 | } | |
373 | ||
059ec3d9 PH |
374 | if (strncmp(p, "#define ", 8) != 0) continue; |
375 | ||
376 | p += 8; | |
377 | while (*p == ' ' || *p == '\t') p++; | |
378 | ||
379 | if (*p < last_initial) fprintf(new, "\n"); | |
380 | last_initial = *p; | |
381 | ||
382 | while (*p && (isalnum((unsigned char)*p) || *p == '_')) *q++ = *p++; | |
383 | *q = 0; | |
384 | ||
385 | /* USE_DB, USE_GDBM, and USE_TDB are special cases. We want to have only | |
386 | one of them set. The scan of the Makefile has saved which was the last one | |
387 | encountered. */ | |
388 | ||
389 | for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++) | |
390 | { | |
391 | if (strcmp(name, db_opts[i]) == 0) | |
392 | { | |
393 | if (use_which_db == i) | |
394 | fprintf(new, "#define %s %.*syes\n", db_opts[i], | |
395 | 21 - (int)strlen(db_opts[i]), " "); | |
396 | else | |
397 | fprintf(new, "/* %s not set */\n", name); | |
398 | break; | |
399 | } | |
400 | } | |
401 | if (i < sizeof(db_opts)/sizeof(char *)) continue; | |
402 | ||
403 | /* EXIM_USER is a special case. We look in the environment for EXIM_USER or | |
404 | EXIM_UID (the latter for backward compatibility with Exim 3). If the value is | |
405 | not numeric, we look up the user, and default the GID if found. Otherwise, | |
406 | EXIM_GROUP or EXIM_GID must be in the environment. */ | |
407 | ||
408 | if (strcmp(name, "EXIM_UID") == 0) | |
409 | { | |
410 | uid_t uid = 0; | |
411 | gid_t gid = 0; | |
412 | int gid_set = 0; | |
10385c15 | 413 | int uid_not_set = 0; |
059ec3d9 PH |
414 | char *username = NULL; |
415 | char *groupname = NULL; | |
416 | char *s; | |
417 | char *user = getenv("EXIM_USER"); | |
418 | char *group = getenv("EXIM_GROUP"); | |
419 | ||
420 | if (user == NULL) user = getenv("EXIM_UID"); | |
421 | if (group == NULL) group = getenv("EXIM_GID"); | |
422 | ||
423 | if (user == NULL) | |
424 | { | |
425 | printf("\n*** EXIM_USER has not been defined in any of the Makefiles in " | |
426 | "the\n \"Local\" directory. Please review your build-time " | |
427 | "configuration.\n\n"); | |
428 | return 1; | |
429 | } | |
430 | ||
431 | while (isspace((unsigned char)(*user))) user++; | |
432 | if (*user == 0) | |
433 | { | |
434 | printf("\n*** EXIM_USER is defined as an empty string in one of the " | |
435 | "files\n in the \"Local\" directory. Please review your build-time" | |
436 | "\n configuration.\n\n"); | |
437 | return 1; | |
438 | } | |
439 | ||
440 | for (s = user; *s != 0; s++) | |
441 | { | |
442 | if (iscntrl((unsigned char)(*s))) | |
443 | { | |
444 | printf("\n*** EXIM_USER contains the control character 0x%02X in one " | |
445 | "of the files\n in the \"Local\" directory. Please review your " | |
446 | "build-time\n configuration.\n\n", *s); | |
447 | return 1; | |
448 | } | |
449 | } | |
450 | ||
451 | /* Numeric uid given */ | |
452 | ||
453 | if (user[strspn(user, "0123456789")] == 0) | |
454 | { | |
455 | uid = (uid_t)atoi(user); | |
456 | } | |
457 | ||
458 | /* User name given. Normally, we look up the uid right away. However, | |
459 | people building binary distributions sometimes want to retain the name till | |
460 | runtime. This is supported if the name begins "ref:". */ | |
461 | ||
462 | else if (strncmp(user, "ref:", 4) == 0) | |
463 | { | |
464 | user += 4; | |
465 | while (isspace(*user)) user++; | |
466 | username = user; | |
467 | gid_set = 1; | |
10385c15 | 468 | uid_not_set = 1; |
059ec3d9 PH |
469 | } |
470 | ||
471 | else | |
472 | { | |
473 | struct passwd *pw = getpwnam(user); | |
474 | if (pw == NULL) | |
475 | { | |
476 | printf("\n*** User \"%s\" (specified in one of the Makefiles) does not " | |
477 | "exist.\n Please review your build-time configuration.\n\n", | |
478 | user); | |
479 | return 1; | |
480 | } | |
481 | ||
482 | uid = pw->pw_uid; | |
483 | gid = pw->pw_gid; | |
484 | gid_set = 1; | |
485 | } | |
486 | ||
487 | /* Use explicit group if set. */ | |
488 | ||
489 | if (group != NULL) | |
490 | { | |
491 | while (isspace((unsigned char)(*group))) group++; | |
492 | if (*group == 0) | |
493 | { | |
494 | printf("\n*** EXIM_GROUP is defined as an empty string in one of " | |
495 | "the files in the\n \"Local\" directory. "); | |
496 | if (gid_set) | |
497 | { | |
498 | printf("If you want the Exim group to be taken from the\n " | |
499 | "password data for the Exim user, just remove the EXIM_GROUP " | |
500 | "setting.\n Otherwise, p"); | |
501 | } | |
502 | else printf("EXIM_USER is defined numerically, so there is no" | |
503 | "\n default for EXIM_GROUP and you must set it explicitly.\n P"); | |
504 | printf("lease review your build-time configuration.\n\n"); | |
505 | return 1; | |
506 | } | |
507 | ||
508 | for (s = group; *s != 0; s++) | |
509 | { | |
510 | if (iscntrl((unsigned char)(*s))) | |
511 | { | |
512 | printf("\n*** EXIM_GROUP contains the control character 0x%02X in one " | |
513 | "of the files\n in the \"Local\" directory. Please review your " | |
514 | "build-time\n configuration.\n\n", *s); | |
515 | return 1; | |
516 | } | |
517 | } | |
518 | ||
519 | /* Group name given. This may be by reference or to be looked up now, | |
520 | as for user. */ | |
521 | ||
522 | if (strncmp(group, "ref:", 4) == 0) | |
523 | { | |
524 | group += 4; | |
525 | while (isspace(*group)) group++; | |
526 | groupname = group; | |
527 | } | |
528 | ||
529 | else if (username != NULL) | |
530 | { | |
531 | groupname = group; | |
532 | } | |
533 | ||
534 | else if (group[strspn(group, "0123456789")] == 0) | |
535 | { | |
536 | gid = (gid_t)atoi(group); | |
537 | } | |
538 | ||
539 | else | |
540 | { | |
541 | struct group *gr = getgrnam(group); | |
542 | if (gr == NULL) | |
543 | { | |
544 | printf("\n*** Group \"%s\" (specified in one of the Makefiles) does " | |
545 | "not exist.\n Please review your build-time configuration.\n\n", | |
546 | group); | |
547 | return 1; | |
548 | } | |
549 | gid = gr->gr_gid; | |
550 | } | |
551 | } | |
552 | ||
553 | /* Else trouble unless found in passwd file with user */ | |
554 | ||
555 | else if (!gid_set) | |
556 | { | |
557 | printf("\n*** No group set for Exim. Please review your build-time " | |
558 | "configuration.\n\n"); | |
559 | return 1; | |
560 | } | |
561 | ||
10385c15 PP |
562 | /* security sanity checks |
563 | if ref: is being used, we can never be sure, but we can take reasonable | |
564 | steps to filter out the most obvious ones. */ | |
565 | ||
566 | if ((!uid_not_set && uid == 0) || | |
655c5895 PP |
567 | ((username != NULL) && ( |
568 | (strcmp(username, "root") == 0) || | |
569 | (strcmp(username, "toor") == 0) ))) | |
10385c15 PP |
570 | { |
571 | printf("\n*** Exim's internal user must not be root.\n\n"); | |
572 | return 1; | |
573 | } | |
574 | ||
059ec3d9 PH |
575 | /* Output user and group names or uid/gid. When names are set, uid/gid |
576 | are set to zero but will be replaced at runtime. */ | |
577 | ||
578 | if (username != NULL) | |
579 | fprintf(new, "#define EXIM_USERNAME \"%s\"\n", username); | |
580 | if (groupname != NULL) | |
581 | fprintf(new, "#define EXIM_GROUPNAME \"%s\"\n", groupname); | |
582 | ||
583 | fprintf(new, "#define EXIM_UID %d\n", (int)uid); | |
584 | fprintf(new, "#define EXIM_GID %d\n", (int)gid); | |
585 | continue; | |
586 | } | |
587 | ||
35edf2ff PH |
588 | /* CONFIGURE_OWNER and CONFIGURE_GROUP are special cases. We look in the |
589 | environment for first. If the value is not numeric, we look up the user or | |
590 | group. A lot of this code is similar to that for EXIM_USER, but it's easier | |
591 | to keep it separate. */ | |
059ec3d9 | 592 | |
35edf2ff PH |
593 | if (strcmp(name, "CONFIGURE_OWNER") == 0 || |
594 | strcmp(name, "CONFIGURE_GROUP") == 0) | |
059ec3d9 | 595 | { |
8e669ac1 | 596 | int isgroup = name[10] == 'G'; |
059ec3d9 | 597 | uid_t uid = 0; |
8e669ac1 | 598 | gid_t gid = 0; |
1ba28e2b PP |
599 | const char *s; |
600 | const char *username = NULL; | |
601 | const char *user = getenv(name); | |
059ec3d9 PH |
602 | |
603 | if (user == NULL) user = ""; | |
604 | while (isspace((unsigned char)(*user))) user++; | |
605 | if (*user == 0) | |
606 | { | |
607 | fprintf(new, "/* %s not set */\n", name); | |
608 | continue; | |
609 | } | |
610 | ||
611 | for (s = user; *s != 0; s++) | |
612 | { | |
613 | if (iscntrl((unsigned char)(*s))) | |
614 | { | |
35edf2ff | 615 | printf("\n*** %s contains the control character 0x%02X in " |
059ec3d9 | 616 | "one of the files\n in the \"Local\" directory. Please review " |
35edf2ff | 617 | "your build-time\n configuration.\n\n", name, *s); |
059ec3d9 PH |
618 | return 1; |
619 | } | |
620 | } | |
621 | ||
622 | /* Numeric uid given */ | |
623 | ||
624 | if (user[strspn(user, "0123456789")] == 0) | |
625 | { | |
35edf2ff PH |
626 | if (isgroup) |
627 | gid = (gid_t)atoi(user); | |
8e669ac1 | 628 | else |
35edf2ff | 629 | uid = (uid_t)atoi(user); |
059ec3d9 PH |
630 | } |
631 | ||
35edf2ff | 632 | /* Name given. Normally, we look up the uid or gid right away. However, |
059ec3d9 PH |
633 | people building binary distributions sometimes want to retain the name till |
634 | runtime. This is supported if the name begins "ref:". */ | |
635 | ||
636 | else if (strncmp(user, "ref:", 4) == 0) | |
637 | { | |
638 | user += 4; | |
639 | while (isspace(*user)) user++; | |
640 | username = user; | |
641 | } | |
1ba28e2b | 642 | else if (isgroup) |
35edf2ff PH |
643 | { |
644 | struct group *gr = getgrnam(user); | |
645 | if (gr == NULL) | |
646 | { | |
647 | printf("\n*** Group \"%s\" (specified in one of the Makefiles) does not " | |
648 | "exist.\n Please review your build-time configuration.\n\n", | |
649 | user); | |
650 | return 1; | |
651 | } | |
652 | gid = gr->gr_gid; | |
653 | } | |
654 | ||
059ec3d9 PH |
655 | else |
656 | { | |
657 | struct passwd *pw = getpwnam(user); | |
658 | if (pw == NULL) | |
659 | { | |
660 | printf("\n*** User \"%s\" (specified in one of the Makefiles) does not " | |
661 | "exist.\n Please review your build-time configuration.\n\n", | |
662 | user); | |
663 | return 1; | |
664 | } | |
059ec3d9 PH |
665 | uid = pw->pw_uid; |
666 | } | |
667 | ||
668 | /* Output user and group names or uid/gid. When names are set, uid/gid | |
669 | are set to zero but will be replaced at runtime. */ | |
670 | ||
671 | if (username != NULL) | |
35edf2ff PH |
672 | { |
673 | if (isgroup) | |
674 | fprintf(new, "#define CONFIGURE_GROUPNAME \"%s\"\n", username); | |
8e669ac1 | 675 | else |
35edf2ff PH |
676 | fprintf(new, "#define CONFIGURE_OWNERNAME \"%s\"\n", username); |
677 | } | |
8e669ac1 | 678 | |
35edf2ff PH |
679 | if (isgroup) |
680 | fprintf(new, "#define CONFIGURE_GROUP %d\n", (int)gid); | |
8e669ac1 | 681 | else |
35edf2ff | 682 | fprintf(new, "#define CONFIGURE_OWNER %d\n", (int)uid); |
059ec3d9 PH |
683 | continue; |
684 | } | |
685 | ||
686 | /* FIXED_NEVER_USERS is another special case. Look up the uid values and | |
687 | create suitable initialization data for a vector. */ | |
688 | ||
689 | if (strcmp(name, "FIXED_NEVER_USERS") == 0) | |
690 | { | |
691 | char *list = getenv("FIXED_NEVER_USERS"); | |
692 | if (list == NULL) | |
693 | { | |
694 | fprintf(new, "#define FIXED_NEVER_USERS 0\n"); | |
695 | } | |
696 | else | |
697 | { | |
698 | int count = 1; | |
926e1192 | 699 | int i, j; |
059ec3d9 PH |
700 | uid_t *vector; |
701 | char *p = list; | |
702 | while (*p != 0) if (*p++ == ':') count++; | |
703 | ||
704 | vector = malloc((count+1) * sizeof(uid_t)); | |
705 | vector[0] = (uid_t)count; | |
706 | ||
926e1192 | 707 | for (i = 1, j = 0; i <= count; list++, i++) |
059ec3d9 PH |
708 | { |
709 | char name[64]; | |
8e669ac1 | 710 | |
059ec3d9 PH |
711 | p = list; |
712 | while (*list != 0 && *list != ':') list++; | |
713 | strncpy(name, p, list-p); | |
714 | name[list-p] = 0; | |
8e669ac1 | 715 | |
926e1192 PH |
716 | if (name[0] == 0) |
717 | { | |
8e669ac1 PH |
718 | continue; |
719 | } | |
926e1192 | 720 | else if (name[strspn(name, "0123456789")] == 0) |
059ec3d9 | 721 | { |
926e1192 | 722 | vector[j++] = (uid_t)atoi(name); |
059ec3d9 PH |
723 | } |
724 | else | |
725 | { | |
726 | struct passwd *pw = getpwnam(name); | |
727 | if (pw == NULL) | |
728 | { | |
729 | printf("\n*** User \"%s\" (specified for FIXED_NEVER_USERS in one of the Makefiles) does not " | |
730 | "exist.\n Please review your build-time configuration.\n\n", | |
731 | name); | |
732 | return 1; | |
733 | } | |
926e1192 | 734 | vector[j++] = pw->pw_uid; |
059ec3d9 PH |
735 | } |
736 | } | |
926e1192 PH |
737 | fprintf(new, "#define FIXED_NEVER_USERS %d", j); |
738 | for (i = 0; i < j; i++) fprintf(new, ", %d", (unsigned int)vector[i]); | |
739 | fprintf(new, "\n"); | |
7cc29763 | 740 | free(vector); |
059ec3d9 PH |
741 | } |
742 | continue; | |
743 | } | |
744 | ||
6f1b3e5d JH |
745 | /* WITH_CONTENT_SCAN is another special case: it must be set if it or |
746 | EXPERIMENTAL_DCC is set. */ | |
c6e692d7 PH |
747 | |
748 | if (strcmp(name, "WITH_CONTENT_SCAN") == 0) | |
749 | { | |
750 | char *wcs = getenv("WITH_CONTENT_SCAN"); | |
6a8f9482 | 751 | char *dcc = getenv("EXPERIMENTAL_DCC"); |
03d5892b JH |
752 | fprintf(new, wcs || dcc |
753 | ? "#define WITH_CONTENT_SCAN yes\n" | |
754 | : "/* WITH_CONTENT_SCAN not set */\n"); | |
c6e692d7 | 755 | continue; |
8e669ac1 | 756 | } |
c6e692d7 | 757 | |
01603eec | 758 | /* DISABLE_DKIM is special; must be forced if DISABLE_TLS */ |
f444c2c7 JH |
759 | if (strcmp(name, "DISABLE_DKIM") == 0) |
760 | { | |
761 | char *d_dkim = getenv("DISABLE_DKIM"); | |
01603eec | 762 | char *notls = getenv("DISABLE_TLS"); |
f444c2c7 JH |
763 | |
764 | if (d_dkim) | |
765 | fprintf(new, "#define DISABLE_DKIM yes\n"); | |
01603eec | 766 | else if (notls) |
f444c2c7 JH |
767 | fprintf(new, "#define DISABLE_DKIM yes /* forced by lack of TLS */\n"); |
768 | else | |
769 | fprintf(new, "/* DISABLE_DKIM not set */\n"); | |
770 | continue; | |
771 | } | |
772 | ||
059ec3d9 PH |
773 | /* Otherwise, check whether a value exists in the environment. Remember if |
774 | it is an AUTH setting or SUPPORT_CRYPTEQ. */ | |
775 | ||
776 | if ((value = getenv(name)) != NULL) | |
777 | { | |
778 | int len; | |
779 | len = 21 - (int)strlen(name); | |
780 | ||
781 | if (strncmp(name, "AUTH_", 5) == 0) have_auth = 1; | |
782 | if (strncmp(name, "SUPPORT_CRYPTEQ", 15) == 0) support_crypteq = 1; | |
783 | ||
784 | /* The text value of LDAP_LIB_TYPE refers to a macro that gets set. */ | |
785 | ||
786 | if (strcmp(name, "LDAP_LIB_TYPE") == 0) | |
787 | { | |
788 | if (strcmp(value, "NETSCAPE") == 0 || | |
789 | strcmp(value, "UMICHIGAN") == 0 || | |
790 | strcmp(value, "OPENLDAP1") == 0 || | |
791 | strcmp(value, "OPENLDAP2") == 0 || | |
792 | strcmp(value, "SOLARIS") == 0 || | |
793 | strcmp(value, "SOLARIS7") == 0) /* Compatibility */ | |
794 | { | |
795 | fprintf(new, "#define LDAP_LIB_%s\n", value); | |
796 | } | |
797 | else | |
798 | { | |
799 | printf("\n*** LDAP_LIB_TYPE=%s is not a recognized LDAP library type." | |
800 | "\n*** Please review your build-time configuration.\n\n", value); | |
801 | return 1; | |
802 | } | |
803 | } | |
804 | ||
805 | else if (strcmp(name, "RADIUS_LIB_TYPE") == 0) | |
806 | { | |
807 | if (strcmp(value, "RADIUSCLIENT") == 0 || | |
7766a4f0 | 808 | strcmp(value, "RADIUSCLIENTNEW") == 0 || |
059ec3d9 PH |
809 | strcmp(value, "RADLIB") == 0) |
810 | { | |
811 | fprintf(new, "#define RADIUS_LIB_%s\n", value); | |
812 | } | |
813 | else | |
814 | { | |
815 | printf("\n*** RADIUS_LIB_TYPE=%s is not a recognized RADIUS library type." | |
816 | "\n*** Please review your build-time configuration.\n\n", value); | |
817 | return 1; | |
818 | } | |
819 | } | |
820 | ||
821 | /* Other macros get set to the environment value. */ | |
822 | ||
823 | else | |
824 | { | |
825 | fprintf(new, "#define %s ", name); | |
826 | while(len-- > 0) fputc(' ', new); | |
827 | ||
828 | /* LOG_FILE_PATH is now messy because it can be a path containing %s or | |
829 | it can be "syslog" or ":syslog" or "syslog:path" or even "path:syslog". */ | |
830 | ||
831 | if (strcmp(name, "LOG_FILE_PATH") == 0) | |
832 | { | |
833 | char *ss = value; | |
834 | for(;;) | |
835 | { | |
836 | char *pp; | |
837 | char *sss = strchr(ss, ':'); | |
838 | if (sss != NULL) | |
839 | { | |
840 | strncpy(buffer, ss, sss-ss); | |
841 | buffer[sss-ss] = 0; /* For empty case */ | |
842 | } | |
ae20c809 JH |
843 | else |
844 | { | |
845 | strncpy(buffer, ss, sizeof(buffer)); | |
846 | buffer[sizeof(buffer)-1] = 0; | |
847 | } | |
059ec3d9 PH |
848 | pp = buffer + (int)strlen(buffer); |
849 | while (pp > buffer && isspace((unsigned char)pp[-1])) pp--; | |
850 | *pp = 0; | |
851 | if (buffer[0] != 0 && strcmp(buffer, "syslog") != 0) | |
852 | check_percent_ess(buffer, name); | |
853 | if (sss == NULL) break; | |
854 | ss = sss + 1; | |
855 | while (isspace((unsigned char)*ss)) ss++; | |
856 | } | |
857 | fprintf(new, "\"%s\"\n", value); | |
858 | } | |
859 | ||
a7cbbf50 PP |
860 | /* Timezone values HEADERS_CHARSET, TCP_WRAPPERS_DAEMON_NAME and |
861 | WHITELIST_D_MACROS get quoted */ | |
059ec3d9 PH |
862 | |
863 | else if (strcmp(name, "TIMEZONE_DEFAULT") == 0|| | |
5dc43717 | 864 | strcmp(name, "TCP_WRAPPERS_DAEMON_NAME") == 0|| |
a7cbbf50 | 865 | strcmp(name, "HEADERS_CHARSET") == 0|| |
2c17bb02 | 866 | strcmp(name, "WHITELIST_D_MACROS") == 0) |
059ec3d9 PH |
867 | fprintf(new, "\"%s\"\n", value); |
868 | ||
2c17bb02 PP |
869 | /* GnuTLS constants; first is for debugging, others are tuning */ |
870 | ||
871 | /* less than 0 is not-active; 0-9 are normal, API suggests higher | |
872 | taken without problems */ | |
873 | else if (strcmp(name, "EXIM_GNUTLS_LIBRARY_LOG_LEVEL") == 0) | |
874 | { | |
875 | long nv; | |
876 | char *end; | |
877 | nv = strtol(value, &end, 10); | |
878 | if (end != value && *end == '\0' && nv >= -1 && nv <= 100) | |
879 | { | |
880 | fprintf(new, "%s\n", value); | |
881 | } | |
882 | else | |
883 | { | |
884 | printf("Value of %s should be -1..9\n", name); | |
885 | return 1; | |
886 | } | |
887 | } | |
888 | ||
889 | /* how many bits Exim, as a client, demands must be in D-H */ | |
54c90be1 PP |
890 | /* 1024 is a historical figure; some sites actually use lower, so we |
891 | permit the value to be lowered "dangerously" low, but not "insanely" | |
892 | low. Though actually, 1024 is becoming "dangerous". */ | |
893 | else if ((strcmp(name, "EXIM_CLIENT_DH_MIN_MIN_BITS") == 0) || | |
894 | (strcmp(name, "EXIM_CLIENT_DH_DEFAULT_MIN_BITS") == 0) || | |
2c17bb02 PP |
895 | (strcmp(name, "EXIM_SERVER_DH_BITS_PRE2_12") == 0)) |
896 | { | |
897 | long nv; | |
898 | char *end; | |
899 | nv = strtol(value, &end, 10); | |
54c90be1 | 900 | if (end != value && *end == '\0' && nv >= 512 && nv < 500000) |
2c17bb02 PP |
901 | { |
902 | fprintf(new, "%s\n", value); | |
903 | } | |
904 | else | |
905 | { | |
906 | printf("Unreasonable value (%s) of \"%s\".\n", value, name); | |
907 | return 1; | |
908 | } | |
909 | } | |
910 | ||
059ec3d9 PH |
911 | /* For others, quote any paths and don't quote anything else */ |
912 | ||
913 | else | |
914 | { | |
915 | if (value[0] == '/') fprintf(new, "\"%s\"\n", value); | |
916 | else fprintf(new, "%s\n", value); | |
917 | } | |
918 | } | |
919 | } | |
920 | ||
921 | /* Value not defined in the environment; use the default */ | |
922 | ||
923 | else | |
924 | { | |
925 | char *t = p; | |
926 | while (*p == ' ' || *p == '\t') p++; | |
927 | if (*p != '\n') fputs(buffer, new); else | |
928 | { | |
929 | *t = 0; | |
930 | if (strcmp(name, "BIN_DIRECTORY") == 0 || | |
931 | strcmp(name, "CONFIGURE_FILE") == 0) | |
932 | { | |
933 | printf("\n*** %s has not been defined in any of the Makefiles in the\n" | |
934 | " \"Local\" directory. " | |
935 | "Please review your build-time configuration.\n\n", name); | |
936 | return 1; | |
937 | } | |
938 | ||
939 | if (strcmp(name, "TIMEZONE_DEFAULT") == 0) | |
940 | { | |
941 | char *tz = getenv("TZ"); | |
942 | fprintf(new, "#define TIMEZONE_DEFAULT "); | |
943 | if (tz == NULL) fprintf(new, "NULL\n"); else | |
944 | fprintf(new, "\"%s\"\n", tz); | |
945 | } | |
946 | ||
947 | else fprintf(new, "/* %s not set */\n", name); | |
948 | } | |
949 | } | |
950 | } | |
951 | ||
f1e894f3 | 952 | (void)fclose(base); |
059ec3d9 PH |
953 | |
954 | /* If any AUTH macros were defined, ensure that SUPPORT_CRYPTEQ is also | |
955 | defined. */ | |
956 | ||
957 | if (have_auth) | |
059ec3d9 PH |
958 | if (!support_crypteq) fprintf(new, "/* Force SUPPORT_CRYPTEQ for AUTH */\n" |
959 | "#define SUPPORT_CRYPTEQ\n"); | |
059ec3d9 | 960 | |
02c30a32 JH |
961 | /* Check poll() for timer functionality. |
962 | Some OS' have released with it broken. */ | |
963 | ||
964 | { | |
965 | struct timeval before, after; | |
02c30a32 JH |
966 | size_t us; |
967 | ||
968 | gettimeofday(&before, NULL); | |
ed2b3ee0 | 969 | (void) poll(NULL, 0, 500); |
02c30a32 JH |
970 | gettimeofday(&after, NULL); |
971 | ||
972 | us = (after.tv_sec - before.tv_sec) * 1000000 + | |
973 | (after.tv_usec - before.tv_usec); | |
974 | ||
975 | if (us < 400000) | |
976 | fprintf(new, "#define NO_POLL_H\n"); | |
977 | } | |
978 | ||
059ec3d9 PH |
979 | /* End off */ |
980 | ||
981 | fprintf(new, "\n/* End of config.h */\n"); | |
f1e894f3 | 982 | (void)fclose(new); |
059ec3d9 PH |
983 | return 0; |
984 | } | |
985 | ||
986 | /* End of buildconfig.c */ |