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 | /* A small freestanding program to build dbm databases from serial input. For | |
10 | alias files, this program fulfils the function of the newaliases program used | |
11 | by other mailers, but it can be used for other dbm data files too. It operates | |
12 | by writing a new file or files, and then renaming; otherwise old entries can | |
13 | never get flushed out. | |
14 | ||
15 | This program is clever enough to cope with ndbm, which creates two files called | |
16 | <name>.dir and <name>.pag, or with db, which creates a single file called | |
17 | <name>.db. If native db is in use (USE_DB defined) or tdb is in use (USE_TDB | |
18 | defined) there is no extension to the output filename. This is also handled. If | |
19 | there are any other variants, the program won't cope. | |
20 | ||
21 | The first argument to the program is the name of the serial file; the second | |
22 | is the base name for the DBM file(s). When native db is in use, these must be | |
23 | different. | |
24 | ||
25 | Input lines beginning with # are ignored, as are blank lines. Entries begin | |
26 | with a key terminated by a colon or end of line or whitespace and continue with | |
27 | indented lines. Keys may be quoted if they contain colons or whitespace or # | |
28 | characters. */ | |
29 | ||
30 | ||
31 | #include "exim.h" | |
32 | ||
0a6c178c | 33 | uschar * spool_directory = NULL; /* dummy for dbstuff.h */ |
059ec3d9 | 34 | |
1a44d9d7 | 35 | /******************************************************************************/ |
628a70e5 | 36 | /* dummies needed by Solaris build */ |
4316e9b3 JH |
37 | void |
38 | millisleep(int msec) | |
39 | {} | |
40 | uschar * | |
41 | readconf_printtime(int t) | |
42 | { return NULL; } | |
628a70e5 | 43 | void * |
f3ebb786 | 44 | store_get_3(int size, BOOL tainted, const char *filename, int linenumber) |
628a70e5 | 45 | { return NULL; } |
f3ebb786 JH |
46 | void ** |
47 | store_reset_3(void **ptr, int pool, const char *filename, int linenumber) | |
81a559c8 | 48 | { return NULL; } |
1a44d9d7 JH |
49 | void |
50 | store_release_above_3(void *ptr, const char *func, int linenumber) | |
51 | { } | |
52 | gstring * | |
53 | string_vformat_trc(gstring * g, const uschar * func, unsigned line, | |
54 | unsigned size_limit, unsigned flags, const char *format, va_list ap) | |
81a559c8 | 55 | { return NULL; } |
8775d84f | 56 | uschar * |
ad1584d5 | 57 | string_sprintf_trc(const char * a, const uschar * b, unsigned c, ...) |
8775d84f | 58 | { return NULL; } |
7c6d4657 JH |
59 | BOOL |
60 | string_format_trc(uschar * buf, int len, const uschar * func, unsigned line, | |
61 | const char * fmt, ...) | |
62 | { return FALSE; } | |
63 | ||
4316e9b3 JH |
64 | |
65 | struct global_flags f; | |
66 | unsigned int log_selector[1]; | |
67 | uschar * queue_name; | |
68 | BOOL split_spool_directory; | |
1a44d9d7 | 69 | /******************************************************************************/ |
628a70e5 JH |
70 | |
71 | ||
059ec3d9 PH |
72 | #define max_insize 20000 |
73 | #define max_outsize 100000 | |
74 | ||
75 | /* This is global because it's defined in the headers and compilers grumble | |
76 | if it is made static. */ | |
77 | ||
1ba28e2b | 78 | const uschar *hex_digits = CUS"0123456789abcdef"; |
059ec3d9 PH |
79 | |
80 | ||
81 | #ifdef STRERROR_FROM_ERRLIST | |
82 | /* Some old-fashioned systems still around (e.g. SunOS4) don't have strerror() | |
83 | in their libraries, but can provide the same facility by this simple | |
84 | alternative function. */ | |
85 | ||
86 | char * | |
87 | strerror(int n) | |
88 | { | |
89 | if (n < 0 || n >= sys_nerr) return "unknown error number"; | |
90 | return sys_errlist[n]; | |
91 | } | |
92 | #endif /* STRERROR_FROM_ERRLIST */ | |
93 | ||
94 | ||
95 | /* For Berkeley DB >= 2, we can define a function to be called in case of DB | |
96 | errors. This should help with debugging strange DB problems, e.g. getting "File | |
1f922db1 | 97 | exists" when you try to open a db file. The API changed at release 4.3. */ |
059ec3d9 PH |
98 | |
99 | #if defined(USE_DB) && defined(DB_VERSION_STRING) | |
100 | void | |
1f922db1 PH |
101 | #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3) |
102 | dbfn_bdb_error_callback(const DB_ENV *dbenv, const char *pfx, const char *msg) | |
103 | { | |
104 | dbenv = dbenv; | |
105 | #else | |
059ec3d9 PH |
106 | dbfn_bdb_error_callback(const char *pfx, char *msg) |
107 | { | |
1f922db1 | 108 | #endif |
059ec3d9 PH |
109 | pfx = pfx; |
110 | printf("Berkeley DB error: %s\n", msg); | |
111 | } | |
112 | #endif | |
113 | ||
114 | ||
115 | ||
116 | /************************************************* | |
117 | * Interpret escape sequence * | |
118 | *************************************************/ | |
119 | ||
120 | /* This function is copied from the main Exim code. | |
121 | ||
122 | Arguments: | |
123 | pp points a pointer to the initiating "\" in the string; | |
124 | the pointer gets updated to point to the final character | |
125 | Returns: the value of the character escape | |
126 | */ | |
127 | ||
128 | int | |
55414b25 | 129 | string_interpret_escape(const uschar **pp) |
059ec3d9 PH |
130 | { |
131 | int ch; | |
55414b25 | 132 | const uschar *p = *pp; |
059ec3d9 | 133 | ch = *(++p); |
c3aefacc | 134 | if (ch == '\0') return **pp; |
059ec3d9 PH |
135 | if (isdigit(ch) && ch != '8' && ch != '9') |
136 | { | |
137 | ch -= '0'; | |
138 | if (isdigit(p[1]) && p[1] != '8' && p[1] != '9') | |
139 | { | |
140 | ch = ch * 8 + *(++p) - '0'; | |
141 | if (isdigit(p[1]) && p[1] != '8' && p[1] != '9') | |
142 | ch = ch * 8 + *(++p) - '0'; | |
143 | } | |
144 | } | |
145 | else switch(ch) | |
146 | { | |
147 | case 'n': ch = '\n'; break; | |
148 | case 'r': ch = '\r'; break; | |
149 | case 't': ch = '\t'; break; | |
150 | case 'x': | |
151 | ch = 0; | |
152 | if (isxdigit(p[1])) | |
153 | { | |
154 | ch = ch * 16 + | |
155 | Ustrchr(hex_digits, tolower(*(++p))) - hex_digits; | |
156 | if (isxdigit(p[1])) ch = ch * 16 + | |
157 | Ustrchr(hex_digits, tolower(*(++p))) - hex_digits; | |
158 | } | |
159 | break; | |
160 | } | |
161 | *pp = p; | |
162 | return ch; | |
163 | } | |
164 | ||
165 | ||
166 | /************************************************* | |
167 | * Main Program * | |
168 | *************************************************/ | |
169 | ||
170 | int main(int argc, char **argv) | |
171 | { | |
172 | int started; | |
173 | int count = 0; | |
174 | int dupcount = 0; | |
175 | int yield = 0; | |
176 | int arg = 1; | |
177 | int add_zero = 1; | |
178 | BOOL lowercase = TRUE; | |
179 | BOOL warn = TRUE; | |
180 | BOOL duperr = TRUE; | |
181 | BOOL lastdup = FALSE; | |
182 | #if !defined (USE_DB) && !defined(USE_TDB) && !defined(USE_GDBM) | |
183 | int is_db = 0; | |
184 | struct stat statbuf; | |
185 | #endif | |
186 | FILE *f; | |
187 | EXIM_DB *d; | |
188 | EXIM_DATUM key, content; | |
189 | uschar *bptr; | |
190 | uschar keybuffer[256]; | |
a0540757 PH |
191 | uschar temp_dbmname[512]; |
192 | uschar real_dbmname[512]; | |
cfb9cf20 | 193 | uschar dirname[512]; |
059ec3d9 PH |
194 | uschar *buffer = malloc(max_outsize); |
195 | uschar *line = malloc(max_insize); | |
196 | ||
197 | while (argc > 1) | |
198 | { | |
199 | if (Ustrcmp(argv[arg], "-nolc") == 0) lowercase = FALSE; | |
200 | else if (Ustrcmp(argv[arg], "-nowarn") == 0) warn = FALSE; | |
201 | else if (Ustrcmp(argv[arg], "-lastdup") == 0) lastdup = TRUE; | |
202 | else if (Ustrcmp(argv[arg], "-noduperr") == 0) duperr = FALSE; | |
203 | else if (Ustrcmp(argv[arg], "-nozero") == 0) add_zero = 0; | |
204 | else break; | |
205 | arg++; | |
206 | argc--; | |
207 | } | |
208 | ||
209 | if (argc != 3) | |
210 | { | |
211 | printf("usage: exim_dbmbuild [-nolc] <source file> <dbm base name>\n"); | |
212 | exit(1); | |
213 | } | |
214 | ||
215 | if (Ustrcmp(argv[arg], "-") == 0) f = stdin; else | |
216 | { | |
217 | f = fopen(argv[arg], "rb"); | |
218 | if (f == NULL) | |
219 | { | |
220 | printf("exim_dbmbuild: unable to open %s: %s\n", argv[arg], strerror(errno)); | |
221 | exit(1); | |
222 | } | |
223 | } | |
224 | ||
225 | /* By default Berkeley db does not put extensions on... which | |
226 | can be painful! */ | |
227 | ||
228 | #if defined(USE_DB) || defined(USE_TDB) || defined(USE_GDBM) | |
229 | if (Ustrcmp(argv[arg], argv[arg+1]) == 0) | |
230 | { | |
231 | printf("exim_dbmbuild: input and output filenames are the same\n"); | |
232 | exit(1); | |
233 | } | |
234 | #endif | |
235 | ||
a0540757 PH |
236 | /* Check length of filename; allow for adding .dbmbuild_temp and .db or |
237 | .dir/.pag later. */ | |
238 | ||
239 | if (strlen(argv[arg+1]) > sizeof(temp_dbmname) - 20) | |
240 | { | |
241 | printf("exim_dbmbuild: output filename is ridiculously long\n"); | |
242 | exit(1); | |
243 | } | |
244 | ||
f3ebb786 JH |
245 | Ustrcpy(temp_dbmname, US argv[arg+1]); |
246 | Ustrcat(temp_dbmname, US".dbmbuild_temp"); | |
059ec3d9 | 247 | |
cfb9cf20 JH |
248 | Ustrcpy(dirname, temp_dbmname); |
249 | if ((bptr = Ustrrchr(dirname, '/'))) | |
250 | *bptr = '\0'; | |
15ae19f9 | 251 | else |
f3ebb786 | 252 | Ustrcpy(dirname, US"."); |
cfb9cf20 | 253 | |
059ec3d9 PH |
254 | /* It is apparently necessary to open with O_RDWR for this to work |
255 | with gdbm-1.7.3, though no reading is actually going to be done. */ | |
256 | ||
cfb9cf20 | 257 | EXIM_DBOPEN(temp_dbmname, dirname, O_RDWR|O_CREAT|O_EXCL, 0644, &d); |
059ec3d9 PH |
258 | |
259 | if (d == NULL) | |
260 | { | |
261 | printf("exim_dbmbuild: unable to create %s: %s\n", temp_dbmname, | |
262 | strerror(errno)); | |
f1e894f3 | 263 | (void)fclose(f); |
059ec3d9 PH |
264 | exit(1); |
265 | } | |
266 | ||
267 | /* Unless using native db calls, see if we have created <name>.db; if not, | |
268 | assume .dir & .pag */ | |
269 | ||
270 | #if !defined(USE_DB) && !defined(USE_TDB) && !defined(USE_GDBM) | |
271 | sprintf(CS real_dbmname, "%s.db", temp_dbmname); | |
272 | is_db = Ustat(real_dbmname, &statbuf) == 0; | |
273 | #endif | |
274 | ||
275 | /* Now do the business */ | |
276 | ||
277 | bptr = buffer; | |
278 | started = 0; | |
279 | ||
280 | while (Ufgets(line, max_insize, f) != NULL) | |
281 | { | |
282 | uschar *p; | |
283 | int len = Ustrlen(line); | |
284 | ||
285 | p = line + len; | |
286 | ||
287 | if (len >= max_insize - 1 && p[-1] != '\n') | |
288 | { | |
289 | printf("Overlong line read: max permitted length is %d\n", max_insize - 1); | |
aa2b5c79 PH |
290 | yield = 2; |
291 | goto TIDYUP; | |
059ec3d9 PH |
292 | } |
293 | ||
294 | if (line[0] == '#') continue; | |
295 | while (p > line && isspace(p[-1])) p--; | |
296 | *p = 0; | |
297 | if (line[0] == 0) continue; | |
298 | ||
299 | /* A continuation line is valid only if there was a previous first | |
300 | line. */ | |
301 | ||
302 | if (isspace(line[0])) | |
303 | { | |
304 | uschar *s = line; | |
305 | if (!started) | |
306 | { | |
307 | printf("Unexpected continuation line ignored\n%s\n\n", line); | |
308 | continue; | |
309 | } | |
310 | while (isspace(*s)) s++; | |
311 | *(--s) = ' '; | |
312 | ||
313 | if (bptr - buffer + p - s >= max_outsize - 1) | |
314 | { | |
315 | printf("Continued set of lines is too long: max permitted length is %d\n", | |
316 | max_outsize -1); | |
aa2b5c79 PH |
317 | yield = 2; |
318 | goto TIDYUP; | |
059ec3d9 PH |
319 | } |
320 | ||
321 | Ustrcpy(bptr, s); | |
322 | bptr += p - s; | |
323 | } | |
324 | ||
325 | /* A first line must have a name followed by a colon or whitespace or | |
326 | end of line, but first finish with a previous line. The key is lower | |
327 | cased by default - this is what the newaliases program for sendmail does. | |
328 | However, there's an option not to do this. */ | |
329 | ||
330 | else | |
331 | { | |
332 | int i, rc; | |
333 | uschar *s = line; | |
334 | uschar *keystart; | |
335 | ||
336 | if (started) | |
337 | { | |
338 | EXIM_DATUM_INIT(content); | |
339 | EXIM_DATUM_DATA(content) = CS buffer; | |
340 | EXIM_DATUM_SIZE(content) = bptr - buffer + add_zero; | |
341 | ||
342 | switch(rc = EXIM_DBPUTB(d, key, content)) | |
343 | { | |
344 | case EXIM_DBPUTB_OK: | |
d7978c0f JH |
345 | count++; |
346 | break; | |
059ec3d9 PH |
347 | |
348 | case EXIM_DBPUTB_DUP: | |
d7978c0f JH |
349 | if (warn) fprintf(stderr, "** Duplicate key \"%s\"\n", keybuffer); |
350 | dupcount++; | |
351 | if(duperr) yield = 1; | |
352 | if (lastdup) EXIM_DBPUT(d, key, content); | |
353 | break; | |
059ec3d9 PH |
354 | |
355 | default: | |
d7978c0f JH |
356 | fprintf(stderr, "Error %d while writing key %s: errno=%d\n", rc, |
357 | keybuffer, errno); | |
358 | yield = 2; | |
359 | goto TIDYUP; | |
059ec3d9 PH |
360 | } |
361 | ||
362 | bptr = buffer; | |
363 | } | |
364 | ||
365 | EXIM_DATUM_INIT(key); | |
366 | EXIM_DATUM_DATA(key) = CS keybuffer; | |
367 | ||
368 | /* Deal with quoted keys. Escape sequences always make one character | |
369 | out of several, so we can re-build in place. */ | |
370 | ||
371 | if (*s == '\"') | |
372 | { | |
373 | uschar *t = s++; | |
374 | keystart = t; | |
375 | while (*s != 0 && *s != '\"') | |
376 | { | |
d7978c0f JH |
377 | *t++ = *s == '\\' |
378 | ? string_interpret_escape((const uschar **)&s) | |
379 | : *s; | |
059ec3d9 PH |
380 | s++; |
381 | } | |
382 | if (*s != 0) s++; /* Past terminating " */ | |
383 | EXIM_DATUM_SIZE(key) = t - keystart + add_zero; | |
384 | } | |
385 | else | |
386 | { | |
387 | keystart = s; | |
388 | while (*s != 0 && *s != ':' && !isspace(*s)) s++; | |
389 | EXIM_DATUM_SIZE(key) = s - keystart + add_zero; | |
390 | } | |
391 | ||
392 | if (EXIM_DATUM_SIZE(key) > 256) | |
393 | { | |
394 | printf("Keys longer than 255 characters cannot be handled\n"); | |
395 | started = 0; | |
396 | yield = 2; | |
397 | goto TIDYUP; | |
398 | } | |
399 | ||
400 | if (lowercase) | |
059ec3d9 PH |
401 | for (i = 0; i < EXIM_DATUM_SIZE(key) - add_zero; i++) |
402 | keybuffer[i] = tolower(keystart[i]); | |
059ec3d9 | 403 | else |
059ec3d9 PH |
404 | for (i = 0; i < EXIM_DATUM_SIZE(key) - add_zero; i++) |
405 | keybuffer[i] = keystart[i]; | |
059ec3d9 PH |
406 | |
407 | keybuffer[i] = 0; | |
408 | started = 1; | |
409 | ||
410 | while (isspace(*s))s++; | |
411 | if (*s == ':') | |
412 | { | |
413 | s++; | |
414 | while (isspace(*s))s++; | |
415 | } | |
416 | if (*s != 0) | |
417 | { | |
418 | Ustrcpy(bptr, s); | |
419 | bptr += p - s; | |
420 | } | |
421 | else buffer[0] = 0; | |
422 | } | |
423 | } | |
424 | ||
425 | if (started) | |
426 | { | |
427 | int rc; | |
428 | EXIM_DATUM_INIT(content); | |
429 | EXIM_DATUM_DATA(content) = CS buffer; | |
430 | EXIM_DATUM_SIZE(content) = bptr - buffer + add_zero; | |
431 | ||
432 | switch(rc = EXIM_DBPUTB(d, key, content)) | |
433 | { | |
434 | case EXIM_DBPUTB_OK: | |
435 | count++; | |
436 | break; | |
437 | ||
438 | case EXIM_DBPUTB_DUP: | |
439 | if (warn) fprintf(stderr, "** Duplicate key \"%s\"\n", keybuffer); | |
440 | dupcount++; | |
441 | if (duperr) yield = 1; | |
442 | if (lastdup) EXIM_DBPUT(d, key, content); | |
443 | break; | |
444 | ||
445 | default: | |
446 | fprintf(stderr, "Error %d while writing key %s: errno=%d\n", rc, | |
447 | keybuffer, errno); | |
448 | yield = 2; | |
449 | break; | |
450 | } | |
451 | } | |
452 | ||
453 | /* Close files, rename or abandon the temporary files, and exit */ | |
454 | ||
455 | TIDYUP: | |
456 | ||
457 | EXIM_DBCLOSE(d); | |
f1e894f3 | 458 | (void)fclose(f); |
059ec3d9 PH |
459 | |
460 | /* If successful, output the number of entries and rename the temporary | |
461 | files. */ | |
462 | ||
463 | if (yield == 0 || yield == 1) | |
464 | { | |
465 | printf("%d entr%s written\n", count, (count == 1)? "y" : "ies"); | |
466 | if (dupcount > 0) | |
467 | { | |
468 | printf("%d duplicate key%s \n", dupcount, (dupcount > 1)? "s" : ""); | |
469 | } | |
470 | ||
471 | #if defined(USE_DB) || defined(USE_TDB) || defined(USE_GDBM) | |
472 | Ustrcpy(real_dbmname, temp_dbmname); | |
f3ebb786 | 473 | Ustrcpy(buffer, US argv[arg+1]); |
059ec3d9 PH |
474 | if (Urename(real_dbmname, buffer) != 0) |
475 | { | |
476 | printf("Unable to rename %s as %s\n", real_dbmname, buffer); | |
477 | return 1; | |
478 | } | |
479 | #else | |
480 | ||
481 | /* Rename a single .db file */ | |
482 | ||
483 | if (is_db) | |
484 | { | |
485 | sprintf(CS real_dbmname, "%s.db", temp_dbmname); | |
486 | sprintf(CS buffer, "%s.db", argv[arg+1]); | |
487 | if (Urename(real_dbmname, buffer) != 0) | |
488 | { | |
489 | printf("Unable to rename %s as %s\n", real_dbmname, buffer); | |
490 | return 1; | |
491 | } | |
492 | } | |
493 | ||
494 | /* Rename .dir and .pag files */ | |
495 | ||
496 | else | |
497 | { | |
498 | sprintf(CS real_dbmname, "%s.dir", temp_dbmname); | |
499 | sprintf(CS buffer, "%s.dir", argv[arg+1]); | |
500 | if (Urename(real_dbmname, buffer) != 0) | |
501 | { | |
502 | printf("Unable to rename %s as %s\n", real_dbmname, buffer); | |
503 | return 1; | |
504 | } | |
505 | ||
506 | sprintf(CS real_dbmname, "%s.pag", temp_dbmname); | |
507 | sprintf(CS buffer, "%s.pag", argv[arg+1]); | |
508 | if (Urename(real_dbmname, buffer) != 0) | |
509 | { | |
510 | printf("Unable to rename %s as %s\n", real_dbmname, buffer); | |
511 | return 1; | |
512 | } | |
513 | } | |
514 | ||
515 | #endif /* USE_DB || USE_TDB || USE_GDBM */ | |
516 | } | |
517 | ||
518 | /* Otherwise unlink the temporary files. */ | |
519 | ||
520 | else | |
521 | { | |
522 | printf("dbmbuild abandoned\n"); | |
d88f0784 JH |
523 | #if defined(USE_DB) || defined(USE_TDB) || defined(USE_GDBM) |
524 | /* We created it, so safe to delete despite the name coming from outside */ | |
6e92b3ae | 525 | /* coverity[tainted_string] */ |
059ec3d9 | 526 | Uunlink(temp_dbmname); |
d88f0784 | 527 | #else |
059ec3d9 PH |
528 | if (is_db) |
529 | { | |
530 | sprintf(CS real_dbmname, "%s.db", temp_dbmname); | |
531 | Uunlink(real_dbmname); | |
532 | } | |
533 | else | |
534 | { | |
535 | sprintf(CS real_dbmname, "%s.dir", temp_dbmname); | |
536 | Uunlink(real_dbmname); | |
537 | sprintf(CS real_dbmname, "%s.pag", temp_dbmname); | |
538 | Uunlink(real_dbmname); | |
539 | } | |
d88f0784 | 540 | #endif /* USE_DB || USE_TDB */ |
059ec3d9 PH |
541 | } |
542 | ||
543 | return yield; | |
544 | } | |
545 | ||
546 | /* End of exim_dbmbuild.c */ |