masqmail

view src/spool.c @ 151:e20fe8c9936a

find changesets by author, revision, files, or words in the commit message
default values for logdir and spooldir we also have defines for LOG_DIR and SPOOL_DIR now
author meillo@marmaro.de
date Wed, 07 Jul 2010 10:32:00 +0200
parents 46f407c0727a
children 3708b655a371
line source
1 /* MasqMail
2 Copyright (C) 1999-2001 Oliver Kurth
3 Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
19
20 #include <sys/stat.h>
21
22 #include "masqmail.h"
23 #include "dotlock.h"
24
25 static gint
26 read_line(FILE * in, gchar * buf, gint buf_len)
27 {
28 gint p = 0;
29 gint c;
30
31 while ((c = getc(in)) != '\n' && (c != EOF)) {
32 if (p >= buf_len - 1) {
33 buf[buf_len-1] = '\0';
34 ungetc(c, in);
35 return buf_len;
36 }
37 buf[p++] = c;
38 }
39
40 if (c == EOF) {
41 return -1;
42 }
43 if ((p > 0) && (buf[p - 1] == '\r'))
44 p--;
45 buf[p++] = '\n';
46 buf[p] = '\0';
47
48 return p;
49 }
50
51 static void
52 spool_write_rcpt(FILE * out, address * rcpt)
53 {
54 gchar dlvrd_char = addr_is_delivered(rcpt) ? 'X' : (addr_is_failed(rcpt) ? 'F' : ' ');
55
56 if (rcpt->local_part[0] != '|') {
57 /* this is a paranoid check, in case it slipped through: */
58 /* if this happens, it is a bug */
59 if (rcpt->domain == NULL) {
60 logwrite(LOG_WARNING, "BUG: null domain for address %s, setting to %s\n", rcpt->local_part, conf.host_name);
61 logwrite(LOG_WARNING, "please report this bug.\n");
62 rcpt->domain = g_strdup(conf.host_name);
63 }
64 fprintf(out, "RT:%c%s\n", dlvrd_char, addr_string(rcpt));
65 } else {
66 fprintf(out, "RT:%c%s\n", dlvrd_char, rcpt->local_part);
67 }
68 }
69
70 static address*
71 spool_scan_rcpt(gchar * line)
72 {
73 address *rcpt = NULL;
74
75 if (line[3] != '\0') {
76 if (line[4] != '|') {
77 rcpt = create_address(&(line[4]), TRUE);
78 } else {
79 rcpt = create_address_pipe(&(line[4]));
80 }
81 if (line[3] == 'X') {
82 addr_mark_delivered(rcpt);
83 } else if (line[3] == 'F') {
84 addr_mark_failed(rcpt);
85 }
86 }
87 return rcpt;
88 }
89
90 gboolean
91 spool_read_data(message * msg)
92 {
93 FILE *in;
94 gchar *spool_file;
95
96 DEBUG(5) debugf("spool_read_data entered\n");
97 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);
98 DEBUG(5) debugf("reading data spool file '%s'\n", spool_file);
99 in = fopen(spool_file, "r");
100 if (!in) {
101 logwrite(LOG_ALERT, "could not open spool data file %s: %s\n", spool_file, strerror(errno));
102 return FALSE;
103 }
104
105 char buf[MAX_DATALINE];
106 int len;
107
108 /* msg uid */
109 read_line(in, buf, MAX_DATALINE);
110
111 /* data */
112 msg->data_list = NULL;
113 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {
114 msg->data_list = g_list_prepend(msg->data_list, g_strdup(buf));
115 }
116 msg->data_list = g_list_reverse(msg->data_list);
117 fclose(in);
118 return TRUE;
119 }
120
121 gboolean
122 spool_read_header(message * msg)
123 {
124 FILE *in;
125 gchar *spool_file;
126
127 /* header spool: */
128 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);
129 in = fopen(spool_file, "r");
130 if (!in) {
131 logwrite(LOG_ALERT, "could not open spool header file %s: %s\n",
132 spool_file, strerror(errno));
133 return FALSE;
134 }
135
136 header *hdr = NULL;
137 char buf[MAX_DATALINE];
138 int len;
139
140 /* msg uid */
141 read_line(in, buf, MAX_DATALINE);
142
143 /* envelope header */
144 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {
145 if (buf[0] == '\n') {
146 break;
147 } else if (strncasecmp(buf, "MF:", 3) == 0) {
148 msg->return_path = create_address(&(buf[3]), TRUE);
149 DEBUG(3) debugf("spool_read: MAIL FROM: %s", msg->return_path->address);
150 } else if (strncasecmp(buf, "RT:", 3) == 0) {
151 address *addr;
152 addr = spool_scan_rcpt(buf);
153 if (addr_is_delivered(addr) || addr_is_failed(addr)) {
154 msg->non_rcpt_list = g_list_append(msg->non_rcpt_list, addr);
155 } else {
156 msg->rcpt_list = g_list_append(msg->rcpt_list, addr);
157 }
158 } else if (strncasecmp(buf, "PR:", 3) == 0) {
159 prot_id i;
160 for (i = 0; i < PROT_NUM; i++) {
161 if (strncasecmp(prot_names[i], &(buf[3]), strlen(prot_names[i])) == 0) {
162 break;
163 }
164 }
165 msg->received_prot = i;
166 } else if (strncasecmp(buf, "RH:", 3) == 0) {
167 g_strchomp(buf);
168 msg->received_host = g_strdup(&(buf[3]));
169 } else if (strncasecmp(buf, "ID:", 3) == 0) {
170 g_strchomp(buf);
171 msg->ident = g_strdup(&(buf[3]));
172 } else if (strncasecmp(buf, "DS:", 3) == 0) {
173 msg->data_size = atoi(&(buf[3]));
174 } else if (strncasecmp(buf, "TR:", 3) == 0) {
175 msg->received_time = (time_t) (atoi(&(buf[3])));
176 } else if (strncasecmp(buf, "TW:", 3) == 0) {
177 msg->warned_time = (time_t) (atoi(&(buf[3])));
178 }
179 /* so far ignore other tags */
180 }
181
182 /* mail headers */
183 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {
184 if (strncasecmp(buf, "HD:", 3) == 0) {
185 hdr = get_header(&(buf[3]));
186 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
187 } else if ((buf[0] == ' ' || buf[0] == '\t') && hdr) {
188 char *tmp = hdr->header;
189 /* header continuation */
190 hdr->header = g_strconcat(hdr->header, buf, NULL);
191 hdr->value = hdr->header + (hdr->value - tmp);
192 } else {
193 break;
194 }
195 }
196 fclose(in);
197 return TRUE;
198 }
199
200 message*
201 msg_spool_read(gchar * uid, gboolean do_readdata)
202 {
203 message *msg;
204 gboolean ok = FALSE;
205
206 msg = create_message();
207 msg->uid = g_strdup(uid);
208
209 DEBUG(4) debugf("msg_spool_read():\n");
210 /* header spool: */
211 ok = spool_read_header(msg);
212 DEBUG(4) debugf(" spool_read_header()=%d, do_readdata=%d\n", ok, do_readdata);
213 if (ok && do_readdata) {
214 /* data spool: */
215 ok = spool_read_data(msg);
216 DEBUG(4) debugf(" spool_read_data()=%d\n", ok);
217 }
218 return msg;
219 }
220
221 /* write header. uid and gid should already be set to the
222 mail ids. Better call spool_write(msg, FALSE).
223 */
224 static gboolean
225 spool_write_header(message * msg)
226 {
227 GList *node;
228 gchar *spool_file, *tmp_file;
229 FILE *out;
230 gboolean ok = TRUE;
231
232 /* header spool: */
233 tmp_file = g_strdup_printf("%s/input/%d-H.tmp", conf.spool_dir, getpid());
234 DEBUG(4) debugf("tmp_file = %s\n", tmp_file);
235
236 if ((out = fopen(tmp_file, "w"))) {
237 DEBUG(6) debugf("opened tmp_file %s\n", tmp_file);
238
239 fprintf(out, "%s\n", msg->uid);
240 fprintf(out, "MF:%s\n", addr_string(msg->return_path));
241
242 DEBUG(6) debugf("after MF\n");
243 foreach(msg->rcpt_list, node) {
244 address *rcpt = (address *) (node->data);
245 spool_write_rcpt(out, rcpt);
246 }
247 foreach(msg->non_rcpt_list, node) {
248 address *rcpt = (address *) (node->data);
249 spool_write_rcpt(out, rcpt);
250 }
251 DEBUG(6) debugf("after RT\n");
252 fprintf(out, "PR:%s\n", prot_names[msg->received_prot]);
253 if (msg->received_host != NULL)
254 fprintf(out, "RH:%s\n", msg->received_host);
255
256 if (msg->ident != NULL)
257 fprintf(out, "ID:%s\n", msg->ident);
258
259 if (msg->data_size >= 0)
260 fprintf(out, "DS: %d\n", msg->data_size);
261
262 if (msg->received_time > 0)
263 fprintf(out, "TR: %u\n", (int) (msg->received_time));
264
265 if (msg->warned_time > 0)
266 fprintf(out, "TW: %u\n", (int) (msg->warned_time));
267
268 DEBUG(6) debugf("after RH\n");
269 fprintf(out, "\n");
270
271 foreach(msg->hdr_list, node) {
272 header *hdr = (header *) (node->data);
273 fprintf(out, "HD:%s", hdr->header);
274 }
275 if (fflush(out) == EOF)
276 ok = FALSE;
277 else if (fdatasync(fileno(out)) != 0) {
278 if (errno != EINVAL) /* some fs do not support this.. I hope this also means that it is not necessary */
279 ok = FALSE;
280 }
281 fclose(out);
282 if (ok) {
283 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);
284 DEBUG(4) debugf("spool_file = %s\n", spool_file);
285 ok = (rename(tmp_file, spool_file) != -1);
286 g_free(spool_file);
287 }
288 } else {
289 logwrite(LOG_ALERT, "could not open temporary header spool file '%s': %s\n", tmp_file, strerror(errno));
290 DEBUG(1) debugf("euid = %d, egid = %d\n", geteuid(), getegid());
291 ok = FALSE;
292 }
293
294 g_free(tmp_file);
295
296 return ok;
297 }
298
299 gboolean
300 spool_write(message * msg, gboolean do_write_data)
301 {
302 GList *list;
303 gchar *spool_file, *tmp_file;
304 FILE *out;
305 gboolean ok = TRUE;
306 uid_t saved_uid, saved_gid;
307 /* user can read/write, group can read, others cannot do anything: */
308 mode_t saved_mode = saved_mode = umask(026);
309
310 /* set uid and gid to the mail ids */
311 if (!conf.run_as_user) {
312 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
313 }
314
315 /* header spool: */
316 ok = spool_write_header(msg);
317
318 if (ok && do_write_data) {
319 /* data spool: */
320 tmp_file = g_strdup_printf("%s/input/%d-D.tmp", conf.spool_dir, getpid());
321 DEBUG(4) debugf("tmp_file = %s\n", tmp_file);
322
323 if ((out = fopen(tmp_file, "w"))) {
324 fprintf(out, "%s\n", msg->uid);
325 for (list = g_list_first(msg->data_list); list != NULL; list = g_list_next(list)) {
326 fprintf(out, "%s", (gchar *) (list->data));
327 }
328
329 /* possibly paranoid ;-) */
330 if (fflush(out) == EOF) {
331 ok = FALSE;
332 } else if (fdatasync(fileno(out)) != 0) {
333 if (errno != EINVAL) { /* some fs do not support this.. I hope this also means that it is not necessary */
334 ok = FALSE;
335 }
336 }
337 fclose(out);
338 if (ok) {
339 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);
340 DEBUG(4) debugf("spool_file = %s\n", spool_file);
341 ok = (rename(tmp_file, spool_file) != -1);
342 g_free(spool_file);
343 }
344 } else {
345 logwrite(LOG_ALERT, "could not open temporary data spool file: %s\n",
346 strerror(errno));
347 ok = FALSE;
348 }
349 g_free(tmp_file);
350 }
351
352 /* set uid and gid back */
353 if (!conf.run_as_user) {
354 set_euidgid(saved_uid, saved_gid, NULL, NULL);
355 }
356
357 umask(saved_mode);
358
359 return ok;
360 }
361
362 #define MAX_LOCKAGE 300
363
364 gboolean
365 spool_lock(gchar * uid)
366 {
367 uid_t saved_uid, saved_gid;
368 gchar *hitch_name;
369 gchar *lock_name;
370 gboolean ok = FALSE;
371
372 hitch_name = g_strdup_printf("%s/%s-%d.lock", conf.lock_dir, uid, getpid());
373 lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);
374
375 /* set uid and gid to the mail ids */
376 if (!conf.run_as_user) {
377 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
378 }
379
380 ok = dot_lock(lock_name, hitch_name);
381 if (!ok)
382 logwrite(LOG_WARNING, "spool file %s is locked\n", uid);
383
384 /* set uid and gid back */
385 if (!conf.run_as_user) {
386 set_euidgid(saved_uid, saved_gid, NULL, NULL);
387 }
388
389 g_free(lock_name);
390 g_free(hitch_name);
391
392 return ok;
393 }
394
395 gboolean
396 spool_unlock(gchar * uid)
397 {
398 uid_t saved_uid, saved_gid;
399 gchar *lock_name;
400
401 /* set uid and gid to the mail ids */
402 if (!conf.run_as_user) {
403 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
404 }
405
406 lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);
407 dot_unlock(lock_name);
408 g_free(lock_name);
409
410 /* set uid and gid back */
411 if (!conf.run_as_user) {
412 set_euidgid(saved_uid, saved_gid, NULL, NULL);
413 }
414 return TRUE;
415 }
416
417 gboolean
418 spool_delete_all(message * msg)
419 {
420 uid_t saved_uid, saved_gid;
421 gchar *spool_file;
422
423 /* set uid and gid to the mail ids */
424 if (!conf.run_as_user) {
425 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
426 }
427
428 /* header spool: */
429 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);
430 if (unlink(spool_file) != 0) {
431 logwrite(LOG_ALERT, "could not delete spool file %s: %s\n", spool_file, strerror(errno));
432 }
433 g_free(spool_file);
434
435 /* data spool: */
436 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);
437 if (unlink(spool_file) != 0) {
438 logwrite(LOG_ALERT, "could not delete spool file %s: %s\n", spool_file, strerror(errno));
439 }
440 g_free(spool_file);
441
442 /* set uid and gid back */
443 if (!conf.run_as_user) {
444 set_euidgid(saved_uid, saved_gid, NULL, NULL);
445 }
446 return TRUE;
447 }