1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-movemail.c: mbox copying function */
/*
* Author:
* Dan Winship <danw@ximian.com>
*
* Copyright 2000 Ximian, Inc. (www.ximian.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/stat.h>
#include <sys/uio.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include "camel-movemail.h"
#include "camel-exception.h"
#include "camel-mime-parser.h"
#include "camel-mime-filter.h"
#include "camel-mime-filter-from.h"
#include "camel-lock-client.h"
#include "camel-i18n.h"
#define d(x)
#ifdef MOVEMAIL_PATH
#include <sys/wait.h>
static void movemail_external (const char *source, const char *dest,
CamelException *ex);
#endif
#ifdef HAVE_BROKEN_SPOOL
static int camel_movemail_copy_filter(int fromfd, int tofd, off_t start, size_t bytes, CamelMimeFilter *filter);
static int camel_movemail_solaris (int oldsfd, int dfd, CamelException *ex);
#else
/* these could probably be exposed as a utility? (but only mbox needs it) */
static int camel_movemail_copy_file(int sfd, int dfd, CamelException *ex);
#endif
#if 0
static int camel_movemail_copy(int fromfd, int tofd, off_t start, size_t bytes);
#endif
/**
* camel_movemail: Copy an mbox file from a shared spool directory to a
* new folder in a Camel store
* @source: source file
* @dest: destination file
* @ex: a CamelException
*
* This copies an mbox file from a shared directory with multiple
* readers and writers into a private (presumably Camel-controlled)
* directory. Dot locking is used on the source file (but not the
* destination).
*
* Return Value: Returns -1 on error.
**/
int
camel_movemail(const char *source, const char *dest, CamelException *ex)
{
int lockid = -1;
int res = -1;
int sfd, dfd;
struct stat st;
camel_exception_clear(ex);
/* Stat and then open the spool file. If it doesn't exist or
* is empty, the user has no mail. (There's technically a race
* condition here in that an MDA might have just now locked it
* to deliver a message, but we don't care. In that case,
* assuming it's unlocked is equivalent to pretending we were
* called a fraction earlier.)
*/
if (stat (source, &st) == -1) {
if (errno != ENOENT) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not check mail file %s: %s"),
source, g_strerror (errno));
}
return -1;
}
if (st.st_size == 0)
return 0;
/* open files */
sfd = open (source, O_RDWR);
if (sfd == -1) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not open mail file %s: %s"),
source, g_strerror (errno));
return -1;
}
dfd = open (dest, O_WRONLY | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR);
if (dfd == -1) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not open temporary mail "
"file %s: %s"), dest,
g_strerror (errno));
close (sfd);
return -1;
}
/* lock our source mailbox */
lockid = camel_lock_helper_lock(source, ex);
if (lockid == -1) {
close(sfd);
close(dfd);
return -1;
}
#ifdef HAVE_BROKEN_SPOOL
res = camel_movemail_solaris(sfd, dfd, ex);
#else
res = camel_movemail_copy_file(sfd, dfd, ex);
#endif
/* If no errors occurred copying the data, and we successfully
* close the destination file, then truncate the source file.
*/
if (res != -1) {
if (close (dfd) == 0) {
ftruncate (sfd, 0);
} else {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Failed to store mail in temp file %s: %s"),
dest, g_strerror (errno));
res = -1;
}
} else
close (dfd);
close (sfd);
camel_lock_helper_unlock(lockid);
return res;
}
#ifdef MOVEMAIL_PATH
static void
movemail_external (const char *source, const char *dest, CamelException *ex)
{
sigset_t mask, omask;
pid_t pid;
int fd[2], len = 0, nread, status;
char buf[BUFSIZ], *output = NULL;
/* Block SIGCHLD so the app can't mess us up. */
sigemptyset (&mask);
sigaddset (&mask, SIGCHLD);
sigprocmask (SIG_BLOCK, &mask, &omask);
if (pipe (fd) == -1) {
sigprocmask (SIG_SETMASK, &omask, NULL);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not create pipe: %s"),
g_strerror (errno));
return;
}
pid = fork ();
switch (pid) {
case -1:
close (fd[0]);
close (fd[1]);
sigprocmask (SIG_SETMASK, &omask, NULL);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not fork: %s"),
g_strerror (errno));
return;
case 0:
/* Child */
close (fd[0]);
close (STDIN_FILENO);
dup2 (fd[1], STDOUT_FILENO);
dup2 (fd[1], STDERR_FILENO);
execl (MOVEMAIL_PATH, MOVEMAIL_PATH, source, dest, NULL);
_exit (255);
break;
default:
break;
}
/* Parent */
close (fd[1]);
/* Read movemail's output. */
while ((nread = read (fd[0], buf, sizeof (buf))) > 0) {
output = g_realloc (output, len + nread + 1);
memcpy (output + len, buf, nread);
len += nread;
output[len] = '\0';
}
close (fd[0]);
/* Now get the exit status. */
while (waitpid (pid, &status, 0) == -1 && errno == EINTR)
;
sigprocmask (SIG_SETMASK, &omask, NULL);
if (!WIFEXITED (status) || WEXITSTATUS (status) != 0) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Movemail program failed: %s"),
output ? output : _("(Unknown error)"));
}
g_free (output);
}
#endif
#ifndef HAVE_BROKEN_SPOOL
static int
camel_movemail_copy_file(int sfd, int dfd, CamelException *ex)
{
int nread, nwrote;
char buf[4096];
while (1) {
int written = 0;
nread = read (sfd, buf, sizeof (buf));
if (nread == 0)
break;
else if (nread == -1) {
if (errno == EINTR)
continue;
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Error reading mail file: %s"),
g_strerror (errno));
return -1;
}
while (nread) {
nwrote = write (dfd, buf + written, nread);
if (nwrote == -1) {
if (errno == EINTR)
continue; /* continues inner loop */
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Error writing mail temp file: %s"),
g_strerror (errno));
return -1;
}
written += nwrote;
nread -= nwrote;
}
}
return 0;
}
#endif
#if 0
static int
camel_movemail_copy(int fromfd, int tofd, off_t start, size_t bytes)
{
char buffer[4096];
int written = 0;
d(printf("writing %d bytes ... ", bytes));
if (lseek(fromfd, start, SEEK_SET) != start)
return -1;
while (bytes>0) {
int toread, towrite;
toread = bytes;
if (bytes>4096)
toread = 4096;
else
toread = bytes;
do {
towrite = read(fromfd, buffer, toread);
} while (towrite == -1 && errno == EINTR);
if (towrite == -1)
return -1;
/* check for 'end of file' */
if (towrite == 0) {
d(printf("end of file?\n"));
break;
}
do {
toread = write(tofd, buffer, towrite);
} while (toread == -1 && errno == EINTR);
if (toread == -1)
return -1;
written += toread;
bytes -= toread;
}
d(printf("written %d bytes\n", written));
return written;
}
#endif
#define PRE_SIZE (32)
#ifdef HAVE_BROKEN_SPOOL
static int
camel_movemail_copy_filter(int fromfd, int tofd, off_t start, size_t bytes, CamelMimeFilter *filter)
{
char buffer[4096+PRE_SIZE];
int written = 0;
char *filterbuffer;
int filterlen, filterpre;
d(printf("writing %d bytes ... ", bytes));
camel_mime_filter_reset(filter);
if (lseek(fromfd, start, SEEK_SET) != start)
return -1;
while (bytes>0) {
int toread, towrite;
toread = bytes;
if (bytes>4096)
toread = 4096;
else
toread = bytes;
do {
towrite = read(fromfd, buffer+PRE_SIZE, toread);
} while (towrite == -1 && errno == EINTR);
if (towrite == -1)
return -1;
d(printf("read %d unfiltered bytes\n", towrite));
/* check for 'end of file' */
if (towrite == 0) {
d(printf("end of file?\n"));
camel_mime_filter_complete(filter, buffer+PRE_SIZE, towrite, PRE_SIZE,
&filterbuffer, &filterlen, &filterpre);
towrite = filterlen;
if (towrite == 0)
break;
} else {
camel_mime_filter_filter(filter, buffer+PRE_SIZE, towrite, PRE_SIZE,
&filterbuffer, &filterlen, &filterpre);
towrite = filterlen;
}
d(printf("writing %d filtered bytes\n", towrite));
do {
toread = write(tofd, filterbuffer, towrite);
} while (toread == -1 && errno == EINTR);
if (toread == -1)
return -1;
written += toread;
bytes -= toread;
}
d(printf("written %d bytes\n", written));
return written;
}
/* write the headers back out again, but not he Content-Length header, because we dont
want to maintain it! */
static int
solaris_header_write(int fd, struct _camel_header_raw *header)
{
struct iovec iv[4];
int outlen = 0, len;
iv[1].iov_base = ":";
iv[1].iov_len = 1;
iv[3].iov_base = "\n";
iv[3].iov_len = 1;
while (header) {
if (strcasecmp(header->name, "Content-Length")) {
iv[0].iov_base = header->name;
iv[0].iov_len = strlen(header->name);
iv[2].iov_base = header->value;
iv[2].iov_len = strlen(header->value);
do {
len = writev(fd, iv, 4);
} while (len == -1 && errno == EINTR);
if (len == -1)
return -1;
outlen += len;
}
header = header->next;
}
do {
len = write(fd, "\n", 1);
} while (len == -1 && errno == EINTR);
if (len == -1)
return -1;
outlen += 1;
d(printf("Wrote %d bytes of headers\n", outlen));
return outlen;
}
/* Well, since Solaris is a tad broken wrt its 'mbox' folder format,
we must convert it to a real mbox format. Thankfully this is
mostly pretty easy */
static int
camel_movemail_solaris (int oldsfd, int dfd, CamelException *ex)
{
CamelMimeParser *mp;
char *buffer;
int len;
int sfd;
CamelMimeFilterFrom *ffrom;
int ret = 1;
char *from = NULL;
/* need to dup as the mime parser will close on finish */
sfd = dup(oldsfd);
if (sfd == -1) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Error copying mail temp file: %s"),
g_strerror (errno));
return -1;
}
mp = camel_mime_parser_new();
camel_mime_parser_scan_from(mp, TRUE);
camel_mime_parser_init_with_fd(mp, sfd);
ffrom = camel_mime_filter_from_new();
while (camel_mime_parser_step(mp, &buffer, &len) == CAMEL_MIME_PARSER_STATE_FROM) {
g_assert(camel_mime_parser_from_line(mp));
from = g_strdup(camel_mime_parser_from_line(mp));
if (camel_mime_parser_step(mp, &buffer, &len) != CAMEL_MIME_PARSER_STATE_FROM_END) {
const char *cl;
int length;
int start, body;
off_t newpos;
ret = 0;
start = camel_mime_parser_tell_start_from(mp);
body = camel_mime_parser_tell(mp);
if (write(dfd, from, strlen(from)) != strlen(from))
goto fail;
/* write out headers, but NOT content-length header */
if (solaris_header_write(dfd, camel_mime_parser_headers_raw(mp)) == -1)
goto fail;
cl = camel_mime_parser_header(mp, "content-length", NULL);
if (cl == NULL) {
g_warning("Required Content-Length header is missing from solaris mail box @ %d", (int)camel_mime_parser_tell(mp));
camel_mime_parser_drop_step(mp);
camel_mime_parser_drop_step(mp);
camel_mime_parser_step(mp, &buffer, &len);
camel_mime_parser_unstep(mp);
length = camel_mime_parser_tell_start_from(mp) - body;
newpos = -1;
} else {
length = atoi(cl);
camel_mime_parser_drop_step(mp);
camel_mime_parser_drop_step(mp);
newpos = length+body;
}
/* copy body->length converting From lines */
if (camel_movemail_copy_filter(sfd, dfd, body, length, (CamelMimeFilter *)ffrom) == -1)
goto fail;
if (newpos != -1)
camel_mime_parser_seek(mp, newpos, SEEK_SET);
} else {
g_error("Inalid parser state: %d", camel_mime_parser_state(mp));
}
g_free(from);
}
camel_object_unref((CamelObject *)mp);
camel_object_unref((CamelObject *)ffrom);
return ret;
fail:
g_free(from);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Error copying mail temp file: %s"),
g_strerror (errno));
camel_object_unref((CamelObject *)mp);
camel_object_unref((CamelObject *)ffrom);
return -1;
}
#endif /* HAVE_BROKEN_SPOOL */
|