1 /*
2 * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2020 the Claws Mail team and Hiroyuki Yamamoto
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 3 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, see <http://www.gnu.org/licenses/>.
17 *
18 */
19
20 #ifdef HAVE_CONFIG_H
21 # include "config.h"
22 #include "claws-features.h"
23 #endif
24
25
26 #include <stdio.h>
27
28 #ifdef USE_PTHREAD
29 #include <pthread.h>
30 #endif
31
32 #include "defs.h"
33 #include <glib.h>
34 #include <glib/gi18n.h>
35 #include <stdlib.h>
36 #include <unistd.h>
37 #include <string.h>
38 #include <fcntl.h>
39 #include <sys/file.h>
40 #include <ctype.h>
41 #include <time.h>
42 #include <errno.h>
43
44 #ifdef G_OS_WIN32
45 # include <w32lib.h>
46 #endif
47
48 #include "mbox.h"
49 #include "procmsg.h"
50 #include "folder.h"
51 #include "prefs_common.h"
52 #include "prefs_account.h"
53 #include "account.h"
54 #include "utils.h"
55 #include "filtering.h"
56 #include "alertpanel.h"
57 #include "statusbar.h"
58 #include "file-utils.h"
59
60 #define MESSAGEBUFSIZE 8192
61
62 #define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
63 { \
64 lines++; \
65 if (claws_fputs(s, tmp_fp) == EOF) { \
66 g_warning("can't write to temporary file"); \
67 claws_fclose(tmp_fp); \
68 claws_fclose(mbox_fp); \
69 claws_unlink(tmp_file); \
70 g_free(tmp_file); \
71 return -1; \
72 } \
73 }
74
proc_mbox(FolderItem * dest,const gchar * mbox,gboolean apply_filter,PrefsAccount * account)75 gint proc_mbox(FolderItem *dest, const gchar *mbox, gboolean apply_filter,
76 PrefsAccount *account)
77 /* return values: -1 error, >=0 number of msgs added */
78 {
79 FILE *mbox_fp;
80 gchar buf[MESSAGEBUFSIZE];
81 gchar *tmp_file;
82 gint msgs = 0;
83 gint lines;
84 MsgInfo *msginfo;
85 gboolean more;
86 GSList *to_filter = NULL, *filtered = NULL, *unfiltered = NULL, *cur, *to_add = NULL;
87 gboolean printed = FALSE;
88 FolderItem *dropfolder;
89 GStatBuf src_stat;
90
91 cm_return_val_if_fail(dest != NULL, -1);
92 cm_return_val_if_fail(mbox != NULL, -1);
93
94 debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
95
96 if (g_stat(mbox, &src_stat) < 0) {
97 FILE_OP_ERROR(mbox, "g_stat");
98 alertpanel_error(_("Could not stat mbox file:\n%s\n"), mbox);
99 return -1;
100 }
101
102 if ((mbox_fp = claws_fopen(mbox, "rb")) == NULL) {
103 FILE_OP_ERROR(mbox, "claws_fopen");
104 alertpanel_error(_("Could not open mbox file:\n%s\n"), mbox);
105 return -1;
106 }
107
108 /* ignore empty lines on the head */
109 do {
110 if (claws_fgets(buf, sizeof(buf), mbox_fp) == NULL) {
111 g_warning("can't read mbox file.");
112 claws_fclose(mbox_fp);
113 return -1;
114 }
115 } while (buf[0] == '\n' || buf[0] == '\r');
116
117 if (strncmp(buf, "From ", 5) != 0) {
118 g_warning("invalid mbox format: %s", mbox);
119 claws_fclose(mbox_fp);
120 return -1;
121 }
122
123 tmp_file = get_tmp_file();
124
125 folder_item_update_freeze();
126
127 if (apply_filter)
128 dropfolder = folder_get_default_processing(account->account_id);
129 else
130 dropfolder = dest;
131
132 do {
133 FILE *tmp_fp;
134 gint empty_lines;
135 gint msgnum;
136
137 if (msgs%10 == 0) {
138 long cur_offset_mb = ftell(mbox_fp) / (1024 * 1024);
139 if (printed)
140 statusbar_pop_all();
141 statusbar_print_all(
142 ngettext("Importing from mbox... (%ld MB imported)",
143 "Importing from mbox... (%ld MB imported)", cur_offset_mb), cur_offset_mb);
144 statusbar_progress_all(cur_offset_mb, src_stat.st_size / (1024*1024), 1);
145 printed=TRUE;
146 GTK_EVENTS_FLUSH();
147 }
148
149 if ((tmp_fp = claws_fopen(tmp_file, "wb")) == NULL) {
150 FILE_OP_ERROR(tmp_file, "claws_fopen");
151 g_warning("can't open temporary file");
152 claws_fclose(mbox_fp);
153 g_free(tmp_file);
154 return -1;
155 }
156 if (change_file_mode_rw(tmp_fp, tmp_file) < 0) {
157 FILE_OP_ERROR(tmp_file, "chmod");
158 }
159
160 empty_lines = 0;
161 lines = 0;
162
163 /* process all lines from mboxrc file */
164 while (claws_fgets(buf, sizeof(buf), mbox_fp) != NULL) {
165 int offset;
166
167 /* eat empty lines */
168 if (buf[0] == '\n' || buf[0] == '\r') {
169 empty_lines++;
170 continue;
171 }
172
173 /* From separator or quoted From */
174 offset = 0;
175 /* detect leading '>' char(s) */
176 while (buf[offset] == '>') {
177 offset++;
178 }
179 if (!strncmp(buf+offset, "From ", 5)) {
180 /* From separator: */
181 if (offset == 0) {
182 /* expect next mbox item */
183 break;
184 }
185
186 /* quoted From: */
187 /* flush any eaten empty line */
188 if (empty_lines > 0) {
189 while (empty_lines-- > 0) {
190 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
191 }
192 empty_lines = 0;
193 }
194 /* store the unquoted line */
195 FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
196 continue;
197 }
198
199 /* other line */
200 /* flush any eaten empty line */
201 if (empty_lines > 0) {
202 while (empty_lines-- > 0) {
203 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
204 }
205 empty_lines = 0;
206 }
207 /* store the line itself */
208 FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
209 }
210 /* end of mbox item or end of mbox */
211
212 /* flush any eaten empty line (but the last one) */
213 if (empty_lines > 0) {
214 while (--empty_lines > 0) {
215 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
216 }
217 }
218
219 /* more emails to expect? */
220 more = !claws_feof(mbox_fp);
221
222 /* warn if email part is empty (it's the minimum check
223 we can do */
224 if (lines == 0) {
225 g_warning("malformed mbox: %s: message %d is empty", mbox, msgs);
226 claws_fclose(tmp_fp);
227 claws_fclose(mbox_fp);
228 claws_unlink(tmp_file);
229 return -1;
230 }
231
232 if (claws_safe_fclose(tmp_fp) == EOF) {
233 FILE_OP_ERROR(tmp_file, "claws_fclose");
234 g_warning("can't write to temporary file");
235 claws_fclose(mbox_fp);
236 claws_unlink(tmp_file);
237 g_free(tmp_file);
238 return -1;
239 }
240
241 if (apply_filter) {
242 if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
243 claws_fclose(mbox_fp);
244 claws_unlink(tmp_file);
245 g_free(tmp_file);
246 return -1;
247 }
248 msginfo = folder_item_get_msginfo(dropfolder, msgnum);
249 to_filter = g_slist_prepend(to_filter, msginfo);
250 } else {
251 MsgFileInfo *finfo = g_new0(MsgFileInfo, 1);
252 finfo->file = tmp_file;
253
254 to_add = g_slist_prepend(to_add, finfo);
255 tmp_file = get_tmp_file();
256
257 /* flush every 500 */
258 if (msgs > 0 && msgs % 500 == 0) {
259 folder_item_add_msgs(dropfolder, to_add, TRUE);
260 procmsg_message_file_list_free(to_add);
261 to_add = NULL;
262 }
263 }
264 msgs++;
265 } while (more);
266
267 if (printed) {
268 statusbar_pop_all();
269 statusbar_progress_all(0, 0, 0);
270 }
271
272 if (apply_filter) {
273
274 folder_item_set_batch(dropfolder, FALSE);
275 procmsg_msglist_filter(to_filter, account,
276 &filtered, &unfiltered, TRUE);
277 folder_item_set_batch(dropfolder, TRUE);
278
279 filtering_move_and_copy_msgs(to_filter);
280 for (cur = filtered; cur; cur = g_slist_next(cur)) {
281 MsgInfo *info = (MsgInfo *)cur->data;
282 procmsg_msginfo_free(&info);
283 }
284
285 unfiltered = g_slist_reverse(unfiltered);
286 if (unfiltered) {
287 folder_item_move_msgs(dest, unfiltered);
288 for (cur = unfiltered; cur; cur = g_slist_next(cur)) {
289 MsgInfo *info = (MsgInfo *)cur->data;
290 procmsg_msginfo_free(&info);
291 }
292 }
293
294 g_slist_free(unfiltered);
295 g_slist_free(filtered);
296 g_slist_free(to_filter);
297 } else if (to_add) {
298 folder_item_add_msgs(dropfolder, to_add, TRUE);
299 procmsg_message_file_list_free(to_add);
300 to_add = NULL;
301 }
302
303 folder_item_update_thaw();
304
305 g_free(tmp_file);
306 claws_fclose(mbox_fp);
307 debug_print("%d messages found.\n", msgs);
308
309 return msgs;
310 }
311
lock_mbox(const gchar * base,LockType type)312 gint lock_mbox(const gchar *base, LockType type)
313 {
314 #ifdef G_OS_UNIX
315 gint retval = 0;
316
317 if (type == LOCK_FILE) {
318 gchar *lockfile, *locklink;
319 gint retry = 0;
320 FILE *lockfp;
321
322 lockfile = g_strdup_printf("%s.%d", base, getpid());
323 if ((lockfp = claws_fopen(lockfile, "wb")) == NULL) {
324 FILE_OP_ERROR(lockfile, "claws_fopen");
325 g_warning("can't create lock file '%s', use 'flock' instead of 'file' if possible.", lockfile);
326 g_free(lockfile);
327 return -1;
328 }
329
330 if (fprintf(lockfp, "%d\n", getpid()) < 0) {
331 FILE_OP_ERROR(lockfile, "fprintf");
332 g_free(lockfile);
333 claws_fclose(lockfp);
334 return -1;
335 }
336
337 if (claws_safe_fclose(lockfp) == EOF) {
338 FILE_OP_ERROR(lockfile, "claws_fclose");
339 g_free(lockfile);
340 return -1;
341 }
342
343 locklink = g_strconcat(base, ".lock", NULL);
344 while (link(lockfile, locklink) < 0) {
345 FILE_OP_ERROR(lockfile, "link");
346 if (retry >= 5) {
347 g_warning("can't create '%s'", lockfile);
348 claws_unlink(lockfile);
349 g_free(lockfile);
350 return -1;
351 }
352 if (retry == 0)
353 g_warning("mailbox is owned by another"
354 " process, waiting...");
355 retry++;
356 sleep(5);
357 }
358 claws_unlink(lockfile);
359 g_free(lockfile);
360 } else if (type == LOCK_FLOCK) {
361 gint lockfd;
362 gboolean fcntled = FALSE;
363 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
364 struct flock fl;
365 fl.l_type = F_WRLCK;
366 fl.l_whence = SEEK_SET;
367 fl.l_start = 0;
368 fl.l_len = 0;
369 #endif
370
371 #if HAVE_FLOCK
372 if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
373 #else
374 if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
375 #endif
376 FILE_OP_ERROR(base, "open");
377 return -1;
378 }
379
380 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
381 if (fcntl(lockfd, F_SETLK, &fl) == -1) {
382 g_warning("can't fnctl %s (%s)", base, g_strerror(errno));
383 close(lockfd);
384 return -1;
385 } else {
386 fcntled = TRUE;
387 }
388 #endif
389
390 #if HAVE_FLOCK
391 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0 && !fcntled) {
392 perror("flock");
393 #else
394 #if HAVE_LOCKF
395 if (lockf(lockfd, F_TLOCK, 0) < 0 && !fcntled) {
396 perror("lockf");
397 #else
398 {
399 #endif
400 #endif /* HAVE_FLOCK */
401 g_warning("can't lock %s", base);
402 if (close(lockfd) < 0)
403 perror("close");
404 return -1;
405 }
406 retval = lockfd;
407 } else {
408 g_warning("invalid lock type");
409 return -1;
410 }
411
412 return retval;
413 #else
414 return -1;
415 #endif /* G_OS_UNIX */
416 }
417
418 gint unlock_mbox(const gchar *base, gint fd, LockType type)
419 {
420 if (type == LOCK_FILE) {
421 gchar *lockfile;
422
423 lockfile = g_strconcat(base, ".lock", NULL);
424 if (claws_unlink(lockfile) < 0) {
425 FILE_OP_ERROR(lockfile, "unlink");
426 g_free(lockfile);
427 return -1;
428 }
429 g_free(lockfile);
430
431 return 0;
432 } else if (type == LOCK_FLOCK) {
433 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
434 gboolean fcntled = FALSE;
435 struct flock fl;
436 fl.l_type = F_UNLCK;
437 fl.l_whence = SEEK_SET;
438 fl.l_start = 0;
439 fl.l_len = 0;
440
441 if (fcntl(fd, F_SETLK, &fl) == -1) {
442 g_warning("can't fnctl %s", base);
443 } else {
444 fcntled = TRUE;
445 }
446 #endif
447 #if HAVE_FLOCK
448 if (flock(fd, LOCK_UN) < 0 && !fcntled) {
449 perror("flock");
450 #else
451 #if HAVE_LOCKF
452 if (lockf(fd, F_ULOCK, 0) < 0 && !fcntled) {
453 perror("lockf");
454 #else
455 {
456 #endif
457 #endif /* HAVE_FLOCK */
458 g_warning("can't unlock %s", base);
459 if (close(fd) < 0)
460 perror("close");
461 return -1;
462 }
463
464 if (close(fd) < 0) {
465 perror("close");
466 return -1;
467 }
468
469 return 0;
470 }
471
472 g_warning("invalid lock type");
473 return -1;
474 }
475
476 gint copy_mbox(gint srcfd, const gchar *dest)
477 {
478 FILE *dest_fp;
479 ssize_t n_read;
480 gchar buf[BUFSIZ];
481 gboolean err = FALSE;
482 int save_errno = 0;
483
484 if (srcfd < 0) {
485 return -1;
486 }
487
488 if ((dest_fp = claws_fopen(dest, "wb")) == NULL) {
489 FILE_OP_ERROR(dest, "claws_fopen");
490 return -1;
491 }
492
493 if (change_file_mode_rw(dest_fp, dest) < 0) {
494 FILE_OP_ERROR(dest, "chmod");
495 g_warning("can't change file mode");
496 }
497
498 while ((n_read = read(srcfd, buf, sizeof(buf))) > 0) {
499 if (claws_fwrite(buf, 1, n_read, dest_fp) < n_read) {
500 g_warning("writing to %s failed.", dest);
501 claws_fclose(dest_fp);
502 claws_unlink(dest);
503 return -1;
504 }
505 }
506
507 if (save_errno != 0) {
508 g_warning("error %d reading mbox: %s", save_errno,
509 g_strerror(save_errno));
510 err = TRUE;
511 }
512
513 if (claws_safe_fclose(dest_fp) == EOF) {
514 FILE_OP_ERROR(dest, "claws_fclose");
515 err = TRUE;
516 }
517
518 if (err) {
519 claws_unlink(dest);
520 return -1;
521 }
522
523 return 0;
524 }
525
526 void empty_mbox(const gchar *mbox)
527 {
528 FILE *fp;
529
530 if ((fp = claws_fopen(mbox, "wb")) == NULL) {
531 FILE_OP_ERROR(mbox, "claws_fopen");
532 g_warning("can't truncate mailbox to zero.");
533 return;
534 }
535 claws_safe_fclose(fp);
536 }
537
538 gint export_list_to_mbox(GSList *mlist, const gchar *mbox)
539 /* return values: -2 skipped, -1 error, 0 OK */
540 {
541 GSList *cur;
542 MsgInfo *msginfo;
543 FILE *msg_fp;
544 FILE *mbox_fp;
545 gchar buf[BUFFSIZE];
546 int err = 0;
547
548 gint msgs = 1, total = g_slist_length(mlist);
549 if (g_file_test(mbox, G_FILE_TEST_EXISTS) == TRUE) {
550 if (alertpanel_full(_("Overwrite mbox file"),
551 _("This file already exists. Do you want to overwrite it?"),
552 GTK_STOCK_CANCEL, _("Overwrite"), NULL,
553 ALERTFOCUS_FIRST, FALSE, NULL, ALERT_WARNING)
554 != G_ALERTALTERNATE) {
555 return -2;
556 }
557 }
558
559 if ((mbox_fp = claws_fopen(mbox, "wb")) == NULL) {
560 FILE_OP_ERROR(mbox, "claws_fopen");
561 alertpanel_error(_("Could not create mbox file:\n%s\n"), mbox);
562 return -1;
563 }
564
565 statusbar_print_all(_("Exporting to mbox..."));
566 for (cur = mlist; cur != NULL; cur = cur->next) {
567 int len;
568 gchar buft[BUFFSIZE];
569 msginfo = (MsgInfo *)cur->data;
570
571 msg_fp = procmsg_open_message(msginfo, TRUE);
572 if (!msg_fp) {
573 continue;
574 }
575
576 strncpy2(buf,
577 msginfo->from ? msginfo->from :
578 cur_account && cur_account->address ?
579 cur_account->address : "unknown",
580 sizeof(buf));
581 extract_address(buf);
582
583 if (fprintf(mbox_fp, "From %s %s",
584 buf, ctime_r(&msginfo->date_t, buft)) < 0) {
585 err = -1;
586 claws_fclose(msg_fp);
587 goto out;
588 }
589
590 buf[0] = '\0';
591
592 /* write email to mboxrc */
593 while (claws_fgets(buf, sizeof(buf), msg_fp) != NULL) {
594 /* quote any From, >From, >>From, etc., according to mbox format specs */
595 int offset;
596
597 offset = 0;
598 /* detect leading '>' char(s) */
599 while (buf[offset] == '>') {
600 offset++;
601 }
602 if (!strncmp(buf+offset, "From ", 5)) {
603 if (claws_fputc('>', mbox_fp) == EOF) {
604 err = -1;
605 claws_fclose(msg_fp);
606 goto out;
607 }
608 }
609 if (claws_fputs(buf, mbox_fp) == EOF) {
610 err = -1;
611 claws_fclose(msg_fp);
612 goto out;
613 }
614 }
615
616 /* force last line to end w/ a newline */
617 len = strlen(buf);
618 if (len > 0) {
619 len--;
620 if ((buf[len] != '\n') && (buf[len] != '\r')) {
621 if (claws_fputc('\n', mbox_fp) == EOF) {
622 err = -1;
623 claws_fclose(msg_fp);
624 goto out;
625 }
626 }
627 }
628
629 /* add a trailing empty line */
630 if (claws_fputc('\n', mbox_fp) == EOF) {
631 err = -1;
632 claws_fclose(msg_fp);
633 goto out;
634 }
635
636 claws_safe_fclose(msg_fp);
637 statusbar_progress_all(msgs++,total, 500);
638 if (msgs%500 == 0)
639 GTK_EVENTS_FLUSH();
640 }
641
642 out:
643 statusbar_progress_all(0,0,0);
644 statusbar_pop_all();
645
646 claws_safe_fclose(mbox_fp);
647
648 return err;
649 }
650
651 /* read all messages in SRC, and store them into one MBOX file. */
652 /* return values: -2 skipped, -1 error, 0 OK */
653 gint export_to_mbox(FolderItem *src, const gchar *mbox)
654 {
655 GSList *mlist;
656 gint ret;
657
658 cm_return_val_if_fail(src != NULL, -1);
659 cm_return_val_if_fail(src->folder != NULL, -1);
660 cm_return_val_if_fail(mbox != NULL, -1);
661
662 debug_print("Exporting messages from %s into %s...\n",
663 src->path, mbox);
664
665 mlist = folder_item_get_msg_list(src);
666
667 folder_item_update_freeze();
668 ret = export_list_to_mbox(mlist, mbox);
669 folder_item_update_thaw();
670
671 procmsg_msg_list_free(mlist);
672
673 return ret;
674 }
675