/[imapfilter]/imapfilter/parse.c
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Contents of /imapfilter/parse.c

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Revision 1.1 - (show annotations)
Thu Jul 31 15:46:02 2003 UTC (20 years, 8 months ago) by lefcha
Branch: MAIN
File MIME type: text/plain
Broke up program files and created some new header files.

1 #include <stdio.h>
2 #include <string.h>
3 #include <limits.h>
4 #include <errno.h>
5 #include <sys/types.h>
6 #include <sys/stat.h>
7 #include <fcntl.h>
8
9 #include "config.h"
10 #include "imapfilter.h"
11 #include "pathnames.h"
12
13
14 extern char logfile[PATH_MAX];
15 extern unsigned int options;
16 extern char charset[CHARSET_LEN];
17 extern unsigned int flags;
18 extern unsigned int interval;
19 extern long timeout;
20 extern char *home;
21
22 #ifdef ENCRYPTED_PASSWORDS
23 char *passphr = NULL; /* Master password to access the passwords
24 * file. */
25 #endif
26
27
28 int parse_config(FILE * fd);
29 void set_options(char *line, regmatch_t * match);
30
31 int parse_passwords(FILE * fd);
32
33
34 /*
35 * Find the path to configuration file, open it and call parse_config().
36 */
37 int
38 read_config(char *cfg)
39 {
40 int r;
41 FILE *fd;
42 char *c;
43
44 c = NULL;
45
46 if (cfg == NULL) {
47 cfg = c = (char *)xmalloc(PATH_MAX * sizeof(char));
48 snprintf(cfg, PATH_MAX, "%s/%s", home, PATHNAME_CONFIG_FILE);
49 }
50 #ifdef DEBUG
51 fprintf(stderr, "debug: configuration file: '%s'\n", cfg);
52 #endif
53 #ifdef CHECK_PERMISSIONS
54 check_file_perms(cfg, S_IRUSR | S_IWUSR);
55 #endif
56 fd = fopen(cfg, "r");
57 if (fd == NULL)
58 fatal(ERROR_FILE_OPEN, "opening config file %s; %s\n", cfg,
59 strerror(errno));
60
61 if (c != NULL)
62 xfree(c);
63
64 if ((r = parse_config(fd)))
65 fatal(ERROR_CONFIG_PARSE,
66 "parse error in config file at row %d\n", r);
67
68 fclose(fd);
69
70 #ifdef DEBUG
71 fprintf(stderr, "debug: options: %0#10x '%s'\n", options, charset);
72 #endif
73
74 return 0;
75 }
76
77
78 /*
79 * Parse configuration file.
80 */
81 int
82 parse_config(FILE * fd)
83 {
84 int i, r;
85 unsigned int row;
86 char line[LINE_MAX];
87 regex_t creg[13];
88 regmatch_t match[11];
89 const char *reg[13] = {
90 "^([[:blank:]]*\n|#.*\n)$",
91
92 "^[[:blank:]]*ACCOUNT[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
93 "(([[:graph:]]+):([[:graph:]]*)|([[:graph:]]+))@"
94 "([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]*"
95 "([[:blank:]]SSL2|[[:blank:]]SSL3|[[:blank:]]TLS1)?"
96 "[[:blank:]]*\n$",
97
98 "^[[:blank:]]*FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
99 "([[:print:]]+)[[:blank:]]*\n$",
100
101 "^[[:blank:]]*FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]*"
102 "([[:blank:]]OR|[[:blank:]]AND)?[[:blank:]]*\n$",
103
104 "^[[:blank:]]*ACTION[[:blank:]]+(DELETE|"
105 "COPY[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|"
106 "MOVE[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|"
107 "RCOPY[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
108 "(\"[[:print:]]*\"|[[:graph:]]+)|"
109 "RMOVE[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
110 "(\"[[:print:]]*\"|[[:graph:]]+)|"
111 "FLAG[[:blank:]]+(REPLACE|ADD|REMOVE)[[:blank:]]+"
112 "([[:alpha:],]+)|"
113 "LIST)[[:blank:]]*([[:graph:]]*)[[:blank:]]*\n$",
114
115 "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|"
116 "AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*"
117 "(ANSWERED|DELETED|DRAFT|FLAGGED|NEW|OLD|RECENT|SEEN|"
118 "UNANSWERED|UNDELETED|UNDRAFT|UNFLAGGED|UNSEEN)[[:blank:]]*\n$",
119
120 "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|"
121 "AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*"
122 "(BCC|BODY|CC|FROM|SUBJECT|TEXT|TO)[[:blank:]]+"
123 "(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$",
124
125 "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|"
126 "AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*"
127 "(HEADER)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)"
128 "[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$",
129
130 "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|"
131 "AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*"
132 "(LARGER|SMALLER|OLDER|NEWER)[[:blank:]]+([[:digit:]]+)"
133 "[[:blank:]]*\n$",
134
135 "^[[:blank:]]*JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+"
136 "([[:alnum:],_-]+)[[:blank:]]*\n$",
137
138 "^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(LOGFILE|CHARSET)"
139 "[[:blank:]]*=[[:blank:]]*(\"[[:print:]]*\"|[[:graph:]]+)"
140 "[[:blank:]]*\n$",
141
142 "^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(ERRORS|EXPUNGE|"
143 "HEADERS|NAMESPACE|SUBSCRIBE)[[:blank:]]*=[[:blank:]]*"
144 "(YES|NO)[[:blank:]]*\n$",
145
146 "^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(DAEMON|TIMEOUT)"
147 "[[:blank:]]*=[[:blank:]]*([[:digit:]]+)\n$"
148 };
149
150 r = row = 0;
151
152 for (i = 0; i < 13; i++)
153 regcomp(&creg[i], reg[i], REG_EXTENDED | REG_ICASE);
154
155 /* First process all the variables. This is done because some
156 * variables' arguments are used before the other commands are
157 * processed. */
158 while (fgets(line, LINE_MAX - 1, fd))
159 if (!regexec(&creg[10], line, 4, match, 0) ||
160 !regexec(&creg[11], line, 4, match, 0) ||
161 !regexec(&creg[12], line, 4, match, 0))
162 set_options(line, match);
163
164 /* Then rewind and process everything else. */
165 fseek(fd, 0L, SEEK_SET);
166 while (fgets(line, LINE_MAX - 1, fd)) {
167 row++;
168 if (!regexec(&creg[0], line, 0, match, 0))
169 continue;
170 else if (!regexec(&creg[1], line, 9, match, 0))
171 set_account(line, match);
172 else if (!regexec(&creg[2], line, 3, match, 0))
173 r = set_mboxgrp(line, match);
174 else if (!regexec(&creg[3], line, 3, match, 0))
175 r = set_filter(line, match);
176 else if (!regexec(&creg[4], line, 11, match, 0))
177 r = set_action(line, match);
178 else if (!regexec(&creg[5], line, 5, match, 0))
179 r = set_mask(line, match, MASK_MATCH_1);
180 else if (!regexec(&creg[6], line, 6, match, 0))
181 r = set_mask(line, match, MASK_MATCH_2);
182 else if (!regexec(&creg[7], line, 7, match, 0))
183 r = set_mask(line, match, MASK_MATCH_3);
184 else if (!regexec(&creg[8], line, 6, match, 0))
185 r = set_mask(line, match, MASK_MATCH_4);
186 else if (!regexec(&creg[9], line, 3, match, 0))
187 r = set_job(line, match);
188 /* Skip variable processing. */
189 else if (!regexec(&creg[10], line, 4, match, 0) ||
190 !regexec(&creg[11], line, 4, match, 0) ||
191 !regexec(&creg[12], line, 4, match, 0));
192 else
193 return row;
194
195 if (r == ERROR_CONFIG_PARSE)
196 return row;
197 }
198
199 for (i = 0; i < 13; i++)
200 regfree(&creg[i]);
201
202 destroy_unneeded();
203
204 return 0;
205 }
206
207
208 /*
209 * Signal SIGHUP received, destroy all data structures and reread the
210 * configuration file.
211 */
212 void
213 reread_config(char *cfg)
214 {
215 destroy_all();
216 read_config(cfg);
217 read_passwords();
218
219 flags &= ~(FLAG_SIGHUP_RECEIVED);
220 }
221
222
223 /*
224 * Set other options found in config file.
225 */
226 void
227 set_options(char *line, regmatch_t * m)
228 {
229 if (!strncasecmp(line + m[2].rm_so, "logfile", 7)) {
230 if (*logfile == '\0') {
231 if (*(line + m[3].rm_so) == '"' &&
232 *(line + m[3].rm_eo - 1) == '"')
233 strncat(logfile, line + m[3].rm_so + 1,
234 min((m[3].rm_eo - m[3].rm_so - 2),
235 PATH_MAX - 1));
236 else
237 strncat(logfile, line + m[3].rm_so,
238 min((m[3].rm_eo - m[3].rm_so),
239 PATH_MAX - 1));
240 }
241 } else if (!strncasecmp(line + m[2].rm_so, "charset", 7)) {
242 if (*(line + m[3].rm_so) == '"' &&
243 *(line + m[3].rm_eo - 1) == '"')
244 strncat(charset, line + m[3].rm_so + 1,
245 min((m[3].rm_eo - m[3].rm_so - 2),
246 CHARSET_LEN - 1));
247 else
248 strncat(charset, line + m[3].rm_so,
249 min((m[3].rm_eo - m[3].rm_so), CHARSET_LEN - 1));
250 } else if (!strncasecmp(line + m[2].rm_so, "errors", 6)) {
251 if (!strncasecmp(line + m[3].rm_so, "yes", 3))
252 options |= OPTION_ERRORS;
253 else
254 options &= ~(OPTION_ERRORS);
255 } else if (!strncasecmp(line + m[2].rm_so, "expunge", 7)) {
256 if (!strncasecmp(line + m[3].rm_so, "yes", 3))
257 options |= OPTION_EXPUNGE;
258 else
259 options &= ~(OPTION_EXPUNGE);
260 } else if (!strncasecmp(line + m[2].rm_so, "header", 6)) {
261 if (!strncasecmp(line + m[3].rm_so, "yes", 3))
262 options |= OPTION_HEADERS;
263 else
264 options &= ~(OPTION_HEADERS);
265 } else if (!strncasecmp(line + m[2].rm_so, "namespace", 9)) {
266 if (!strncasecmp(line + m[3].rm_so, "yes", 3))
267 options |= OPTION_NAMESPACE;
268 else
269 options &= ~(OPTION_NAMESPACE);
270 } else if (!strncasecmp(line + m[2].rm_so, "subscribe", 9)) {
271 if (!strncasecmp(line + m[3].rm_so, "yes", 3))
272 options |= OPTION_SUBSCRIBE;
273 else
274 options &= ~(OPTION_SUBSCRIBE);
275 } else if (!strncasecmp(line + m[2].rm_so, "timeout", 7)) {
276 errno = 0;
277 timeout = strtol(line + m[3].rm_so, NULL, 10);
278 if (errno)
279 timeout = 0;
280 } else if (!strncasecmp(line + m[2].rm_so, "daemon", 6) &&
281 !(options & OPTION_DAEMON_MODE)) {
282 options |= OPTION_DAEMON_MODE;
283 errno = 0;
284 interval = strtoul(line + m[3].rm_so, NULL, 10);
285 if (errno)
286 interval = 0;
287 }
288 }
289
290
291 #ifdef ENCRYPTED_PASSWORDS
292 /*
293 * Open password file and call parse_passwords().
294 */
295 int
296 read_passwords(void)
297 {
298 FILE *fd;
299 char pwfile[PATH_MAX];
300
301 if (!(flags & FLAG_BLANK_PASSWORD))
302 return ERROR_CONFIG_PARSE;
303
304 if (!passphr) {
305 passphr = (char *)smalloc(PASSPHRASE_LEN);
306 *passphr = '\0';
307 }
308 snprintf(pwfile, PATH_MAX, "%s/%s", home, PATHNAME_PASSWORD_FILE);
309 #ifdef DEBUG
310 fprintf(stderr, "debug: passwords file: '%s'\n", pwfile);
311 #endif
312
313 if (!exists_file(pwfile))
314 return ERROR_FILE_OPEN;
315
316 #ifdef CHECK_PERMISSIONS
317 check_file_perms(pwfile, S_IRUSR | S_IWUSR);
318 #endif
319
320 fd = fopen(pwfile, "r");
321 if (fd == NULL)
322 fatal(ERROR_FILE_OPEN, "opening passwords file %s; %s\n",
323 pwfile, strerror(errno));
324
325 parse_passwords(fd);
326
327 fclose(fd);
328
329 return 0;
330 }
331
332
333 /*
334 * Parse unencrypted password file.
335 */
336 int
337 parse_passwords(FILE * fd)
338 {
339 int t;
340 char *pe;
341 char user[USERNAME_LEN], serv[SERVER_LEN];
342 unsigned char *buf;
343 char *c, *cp, *line;
344 regex_t creg;
345 regmatch_t match[4];
346 const char *reg;
347
348 t = 3;
349 pe = NULL;
350 reg = "([[:alnum:].-]+) ([[:graph:]]+) ([[:graph:]]+)";
351
352 if (!(flags & FLAG_DAEMON_MODE)) {
353 do {
354 fseek(fd, 0L, SEEK_SET);
355 printf("Enter master passphrase: ");
356 get_password(passphr, PASSPHRASE_LEN);
357 } while (decrypt_passwords(&buf, fd) && --t != 0);
358
359 if (!t)
360 return ERROR_PASSPHRASE;
361 } else if (decrypt_passwords(&buf, fd))
362 fatal(ERROR_DECRYPT,
363 "failed decrypting passwords in daemon mode\n");
364
365 c = cp = sstrdup(buf);
366
367 regcomp(&creg, reg, REG_EXTENDED | REG_ICASE);
368
369 line = strtok_r(c, "\n", &c);
370 while (line != NULL && !regexec(&creg, line, 4, match, 0)) {
371 user[0] = serv[0] = '\0';
372
373 strncat(serv, line + match[1].rm_so,
374 min(match[1].rm_eo - match[1].rm_so, SERVER_LEN - 1));
375 strncat(user, line + match[2].rm_so,
376 min(match[2].rm_eo - match[2].rm_so, USERNAME_LEN - 1));
377
378 if ((pe = (char *)find_password(user, serv)))
379 strncat(pe, line + match[3].rm_so,
380 min(match[3].rm_eo - match[3].rm_so,
381 PASSWORD_LEN - 1));
382
383 line = strtok_r(NULL, "\n", &c);
384 }
385
386 regfree(&creg);
387 sfree(cp);
388 sfree(buf);
389
390 return 0;
391 }
392
393
394 /*
395 * Store encrypted passwords to file.
396 */
397 int
398 store_passwords(account_t ** accts)
399 {
400 char pwfile[PATH_MAX];
401 FILE *fd;
402
403 snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
404
405 create_file(pwfile, S_IRUSR | S_IWUSR);
406
407 fd = fopen(pwfile, "w");
408
409 if (fd == NULL)
410 fatal(ERROR_FILE_OPEN, "opening passwords file %s; %s\n",
411 pwfile, strerror(errno));
412
413 encrypt_passwords(fd, accts);
414
415 fclose(fd);
416
417 return 0;
418 }
419 #endif /* ENCRYPTED_PASSWORDS */

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