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

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Revision 1.1 - (hide 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 lefcha 1.1 #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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