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imap-send: cleanup execl() call to use NULL sentinel instead of 0
[git/gitweb.git] / imap-send.c
blob203284d8f01ad513a99d1fa432828ced6a8e7bd9
1 /*
2 * git-imap-send - drops patches into an imap Drafts folder
3 * derived from isync/mbsync - mailbox synchronizer
4 *
5 * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
6 * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
7 * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
8 * Copyright (C) 2006 Mike McCormack
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25 #include "cache.h"
26
27 #include <assert.h>
28 #include <netinet/in.h>
29 #include <netinet/tcp.h>
30 #include <arpa/inet.h>
31 #include <netdb.h>
32
33 typedef struct store_conf {
34 char *name;
35 const char *path; /* should this be here? its interpretation is driver-specific */
36 char *map_inbox;
37 char *trash;
38 unsigned max_size; /* off_t is overkill */
39 unsigned trash_remote_new:1, trash_only_new:1;
40 } store_conf_t;
41
42 typedef struct string_list {
43 struct string_list *next;
44 char string[1];
45 } string_list_t;
46
47 typedef struct channel_conf {
48 struct channel_conf *next;
49 char *name;
50 store_conf_t *master, *slave;
51 char *master_name, *slave_name;
52 char *sync_state;
53 string_list_t *patterns;
54 int mops, sops;
55 unsigned max_messages; /* for slave only */
56 } channel_conf_t;
57
58 typedef struct group_conf {
59 struct group_conf *next;
60 char *name;
61 string_list_t *channels;
62 } group_conf_t;
63
64 /* For message->status */
65 #define M_RECENT (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
66 #define M_DEAD (1<<1) /* expunged */
67 #define M_FLAGS (1<<2) /* flags fetched */
68
69 typedef struct message {
70 struct message *next;
71 /* string_list_t *keywords; */
72 size_t size; /* zero implies "not fetched" */
73 int uid;
74 unsigned char flags, status;
75 } message_t;
76
77 typedef struct store {
78 store_conf_t *conf; /* foreign */
79
80 /* currently open mailbox */
81 const char *name; /* foreign! maybe preset? */
82 char *path; /* own */
83 message_t *msgs; /* own */
84 int uidvalidity;
85 unsigned char opts; /* maybe preset? */
86 /* note that the following do _not_ reflect stats from msgs, but mailbox totals */
87 int count; /* # of messages */
88 int recent; /* # of recent messages - don't trust this beyond the initial read */
89 } store_t;
90
91 typedef struct {
92 char *data;
93 int len;
94 unsigned char flags;
95 unsigned char crlf:1;
96 } msg_data_t;
97
98 #define DRV_OK 0
99 #define DRV_MSG_BAD -1
100 #define DRV_BOX_BAD -2
101 #define DRV_STORE_BAD -3
102
103 static int Verbose, Quiet;
104
105 static void info( const char *, ... );
106 static void warn( const char *, ... );
107
108 static char *next_arg( char ** );
109
110 static void free_generic_messages( message_t * );
111
112 static int nfvasprintf( char **str, const char *fmt, va_list va );
113 static int nfsnprintf( char *buf, int blen, const char *fmt, ... );
114
115
116 static void arc4_init( void );
117 static unsigned char arc4_getbyte( void );
118
119 typedef struct imap_server_conf {
120 char *name;
121 char *tunnel;
122 char *host;
123 int port;
124 char *user;
125 char *pass;
126 } imap_server_conf_t;
127
128 typedef struct imap_store_conf {
129 store_conf_t gen;
130 imap_server_conf_t *server;
131 unsigned use_namespace:1;
132 } imap_store_conf_t;
133
134 #define NIL (void*)0x1
135 #define LIST (void*)0x2
136
137 typedef struct _list {
138 struct _list *next, *child;
139 char *val;
140 int len;
141 } list_t;
142
143 typedef struct {
144 int fd;
145 } Socket_t;
146
147 typedef struct {
148 Socket_t sock;
149 int bytes;
150 int offset;
151 char buf[1024];
152 } buffer_t;
153
154 struct imap_cmd;
155
156 typedef struct imap {
157 int uidnext; /* from SELECT responses */
158 list_t *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
159 unsigned caps, rcaps; /* CAPABILITY results */
160 /* command queue */
161 int nexttag, num_in_progress, literal_pending;
162 struct imap_cmd *in_progress, **in_progress_append;
163 buffer_t buf; /* this is BIG, so put it last */
164 } imap_t;
165
166 typedef struct imap_store {
167 store_t gen;
168 int uidvalidity;
169 imap_t *imap;
170 const char *prefix;
171 unsigned /*currentnc:1,*/ trashnc:1;
172 } imap_store_t;
173
174 struct imap_cmd_cb {
175 int (*cont)( imap_store_t *ctx, struct imap_cmd *cmd, const char *prompt );
176 void (*done)( imap_store_t *ctx, struct imap_cmd *cmd, int response);
177 void *ctx;
178 char *data;
179 int dlen;
180 int uid;
181 unsigned create:1, trycreate:1;
182 };
183
184 struct imap_cmd {
185 struct imap_cmd *next;
186 struct imap_cmd_cb cb;
187 char *cmd;
188 int tag;
189 };
190
191 #define CAP(cap) (imap->caps & (1 << (cap)))
192
193 enum CAPABILITY {
194 NOLOGIN = 0,
195 UIDPLUS,
196 LITERALPLUS,
197 NAMESPACE,
198 };
199
200 static const char *cap_list[] = {
201 "LOGINDISABLED",
202 "UIDPLUS",
203 "LITERAL+",
204 "NAMESPACE",
205 };
206
207 #define RESP_OK 0
208 #define RESP_NO 1
209 #define RESP_BAD 2
210
211 static int get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd );
212
213
214 static const char *Flags[] = {
215 "Draft",
216 "Flagged",
217 "Answered",
218 "Seen",
219 "Deleted",
220 };
221
222 static void
223 socket_perror( const char *func, Socket_t *sock, int ret )
224 {
225 if (ret < 0)
226 perror( func );
227 else
228 fprintf( stderr, "%s: unexpected EOF\n", func );
229 }
230
231 static int
232 socket_read( Socket_t *sock, char *buf, int len )
233 {
234 int n = read( sock->fd, buf, len );
235 if (n <= 0) {
236 socket_perror( "read", sock, n );
237 close( sock->fd );
238 sock->fd = -1;
239 }
240 return n;
241 }
242
243 static int
244 socket_write( Socket_t *sock, char *buf, int len )
245 {
246 int n = write( sock->fd, buf, len );
247 if (n != len) {
248 socket_perror( "write", sock, n );
249 close( sock->fd );
250 sock->fd = -1;
251 }
252 return n;
253 }
254
255 /* simple line buffering */
256 static int
257 buffer_gets( buffer_t * b, char **s )
258 {
259 int n;
260 int start = b->offset;
261
262 *s = b->buf + start;
263
264 for (;;) {
265 /* make sure we have enough data to read the \r\n sequence */
266 if (b->offset + 1 >= b->bytes) {
267 if (start) {
268 /* shift down used bytes */
269 *s = b->buf;
270
271 assert( start <= b->bytes );
272 n = b->bytes - start;
273
274 if (n)
275 memcpy( b->buf, b->buf + start, n );
276 b->offset -= start;
277 b->bytes = n;
278 start = 0;
279 }
280
281 n = socket_read( &b->sock, b->buf + b->bytes,
282 sizeof(b->buf) - b->bytes );
283
284 if (n <= 0)
285 return -1;
286
287 b->bytes += n;
288 }
289
290 if (b->buf[b->offset] == '\r') {
291 assert( b->offset + 1 < b->bytes );
292 if (b->buf[b->offset + 1] == '\n') {
293 b->buf[b->offset] = 0; /* terminate the string */
294 b->offset += 2; /* next line */
295 if (Verbose)
296 puts( *s );
297 return 0;
298 }
299 }
300
301 b->offset++;
302 }
303 /* not reached */
304 }
305
306 static void
307 info( const char *msg, ... )
308 {
309 va_list va;
310
311 if (!Quiet) {
312 va_start( va, msg );
313 vprintf( msg, va );
314 va_end( va );
315 fflush( stdout );
316 }
317 }
318
319 static void
320 warn( const char *msg, ... )
321 {
322 va_list va;
323
324 if (Quiet < 2) {
325 va_start( va, msg );
326 vfprintf( stderr, msg, va );
327 va_end( va );
328 }
329 }
330
331 static char *
332 next_arg( char **s )
333 {
334 char *ret;
335
336 if (!s || !*s)
337 return 0;
338 while (isspace( (unsigned char) **s ))
339 (*s)++;
340 if (!**s) {
341 *s = 0;
342 return 0;
343 }
344 if (**s == '"') {
345 ++*s;
346 ret = *s;
347 *s = strchr( *s, '"' );
348 } else {
349 ret = *s;
350 while (**s && !isspace( (unsigned char) **s ))
351 (*s)++;
352 }
353 if (*s) {
354 if (**s)
355 *(*s)++ = 0;
356 if (!**s)
357 *s = 0;
358 }
359 return ret;
360 }
361
362 static void
363 free_generic_messages( message_t *msgs )
364 {
365 message_t *tmsg;
366
367 for (; msgs; msgs = tmsg) {
368 tmsg = msgs->next;
369 free( msgs );
370 }
371 }
372
373 static int
374 vasprintf( char **strp, const char *fmt, va_list ap )
375 {
376 int len;
377 char tmp[1024];
378
379 if ((len = vsnprintf( tmp, sizeof(tmp), fmt, ap )) < 0 || !(*strp = xmalloc( len + 1 )))
380 return -1;
381 if (len >= (int)sizeof(tmp))
382 vsprintf( *strp, fmt, ap );
383 else
384 memcpy( *strp, tmp, len + 1 );
385 return len;
386 }
387
388 static int
389 nfsnprintf( char *buf, int blen, const char *fmt, ... )
390 {
391 int ret;
392 va_list va;
393
394 va_start( va, fmt );
395 if (blen <= 0 || (unsigned)(ret = vsnprintf( buf, blen, fmt, va )) >= (unsigned)blen)
396 die( "Fatal: buffer too small. Please report a bug.\n");
397 va_end( va );
398 return ret;
399 }
400
401 static int
402 nfvasprintf( char **str, const char *fmt, va_list va )
403 {
404 int ret = vasprintf( str, fmt, va );
405 if (ret < 0)
406 die( "Fatal: Out of memory\n");
407 return ret;
408 }
409
410 static struct {
411 unsigned char i, j, s[256];
412 } rs;
413
414 static void
415 arc4_init( void )
416 {
417 int i, fd;
418 unsigned char j, si, dat[128];
419
420 if ((fd = open( "/dev/urandom", O_RDONLY )) < 0 && (fd = open( "/dev/random", O_RDONLY )) < 0) {
421 fprintf( stderr, "Fatal: no random number source available.\n" );
422 exit( 3 );
423 }
424 if (read( fd, dat, 128 ) != 128) {
425 fprintf( stderr, "Fatal: cannot read random number source.\n" );
426 exit( 3 );
427 }
428 close( fd );
429
430 for (i = 0; i < 256; i++)
431 rs.s[i] = i;
432 for (i = j = 0; i < 256; i++) {
433 si = rs.s[i];
434 j += si + dat[i & 127];
435 rs.s[i] = rs.s[j];
436 rs.s[j] = si;
437 }
438 rs.i = rs.j = 0;
439
440 for (i = 0; i < 256; i++)
441 arc4_getbyte();
442 }
443
444 static unsigned char
445 arc4_getbyte( void )
446 {
447 unsigned char si, sj;
448
449 rs.i++;
450 si = rs.s[rs.i];
451 rs.j += si;
452 sj = rs.s[rs.j];
453 rs.s[rs.i] = sj;
454 rs.s[rs.j] = si;
455 return rs.s[(si + sj) & 0xff];
456 }
457
458 static struct imap_cmd *
459 v_issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb,
460 const char *fmt, va_list ap )
461 {
462 imap_t *imap = ctx->imap;
463 struct imap_cmd *cmd;
464 int n, bufl;
465 char buf[1024];
466
467 cmd = xmalloc( sizeof(struct imap_cmd) );
468 nfvasprintf( &cmd->cmd, fmt, ap );
469 cmd->tag = ++imap->nexttag;
470
471 if (cb)
472 cmd->cb = *cb;
473 else
474 memset( &cmd->cb, 0, sizeof(cmd->cb) );
475
476 while (imap->literal_pending)
477 get_cmd_result( ctx, 0 );
478
479 bufl = nfsnprintf( buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
480 "%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
481 cmd->tag, cmd->cmd, cmd->cb.dlen );
482 if (Verbose) {
483 if (imap->num_in_progress)
484 printf( "(%d in progress) ", imap->num_in_progress );
485 if (memcmp( cmd->cmd, "LOGIN", 5 ))
486 printf( ">>> %s", buf );
487 else
488 printf( ">>> %d LOGIN <user> <pass>\n", cmd->tag );
489 }
490 if (socket_write( &imap->buf.sock, buf, bufl ) != bufl) {
491 free( cmd->cmd );
492 free( cmd );
493 if (cb && cb->data)
494 free( cb->data );
495 return NULL;
496 }
497 if (cmd->cb.data) {
498 if (CAP(LITERALPLUS)) {
499 n = socket_write( &imap->buf.sock, cmd->cb.data, cmd->cb.dlen );
500 free( cmd->cb.data );
501 if (n != cmd->cb.dlen ||
502 (n = socket_write( &imap->buf.sock, "\r\n", 2 )) != 2)
503 {
504 free( cmd->cmd );
505 free( cmd );
506 return NULL;
507 }
508 cmd->cb.data = 0;
509 } else
510 imap->literal_pending = 1;
511 } else if (cmd->cb.cont)
512 imap->literal_pending = 1;
513 cmd->next = 0;
514 *imap->in_progress_append = cmd;
515 imap->in_progress_append = &cmd->next;
516 imap->num_in_progress++;
517 return cmd;
518 }
519
520 static struct imap_cmd *
521 issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
522 {
523 struct imap_cmd *ret;
524 va_list ap;
525
526 va_start( ap, fmt );
527 ret = v_issue_imap_cmd( ctx, cb, fmt, ap );
528 va_end( ap );
529 return ret;
530 }
531
532 static int
533 imap_exec( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
534 {
535 va_list ap;
536 struct imap_cmd *cmdp;
537
538 va_start( ap, fmt );
539 cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
540 va_end( ap );
541 if (!cmdp)
542 return RESP_BAD;
543
544 return get_cmd_result( ctx, cmdp );
545 }
546
547 static int
548 imap_exec_m( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
549 {
550 va_list ap;
551 struct imap_cmd *cmdp;
552
553 va_start( ap, fmt );
554 cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
555 va_end( ap );
556 if (!cmdp)
557 return DRV_STORE_BAD;
558
559 switch (get_cmd_result( ctx, cmdp )) {
560 case RESP_BAD: return DRV_STORE_BAD;
561 case RESP_NO: return DRV_MSG_BAD;
562 default: return DRV_OK;
563 }
564 }
565
566 static int
567 is_atom( list_t *list )
568 {
569 return list && list->val && list->val != NIL && list->val != LIST;
570 }
571
572 static int
573 is_list( list_t *list )
574 {
575 return list && list->val == LIST;
576 }
577
578 static void
579 free_list( list_t *list )
580 {
581 list_t *tmp;
582
583 for (; list; list = tmp) {
584 tmp = list->next;
585 if (is_list( list ))
586 free_list( list->child );
587 else if (is_atom( list ))
588 free( list->val );
589 free( list );
590 }
591 }
592
593 static int
594 parse_imap_list_l( imap_t *imap, char **sp, list_t **curp, int level )
595 {
596 list_t *cur;
597 char *s = *sp, *p;
598 int n, bytes;
599
600 for (;;) {
601 while (isspace( (unsigned char)*s ))
602 s++;
603 if (level && *s == ')') {
604 s++;
605 break;
606 }
607 *curp = cur = xmalloc( sizeof(*cur) );
608 curp = &cur->next;
609 cur->val = 0; /* for clean bail */
610 if (*s == '(') {
611 /* sublist */
612 s++;
613 cur->val = LIST;
614 if (parse_imap_list_l( imap, &s, &cur->child, level + 1 ))
615 goto bail;
616 } else if (imap && *s == '{') {
617 /* literal */
618 bytes = cur->len = strtol( s + 1, &s, 10 );
619 if (*s != '}')
620 goto bail;
621
622 s = cur->val = xmalloc( cur->len );
623
624 /* dump whats left over in the input buffer */
625 n = imap->buf.bytes - imap->buf.offset;
626
627 if (n > bytes)
628 /* the entire message fit in the buffer */
629 n = bytes;
630
631 memcpy( s, imap->buf.buf + imap->buf.offset, n );
632 s += n;
633 bytes -= n;
634
635 /* mark that we used part of the buffer */
636 imap->buf.offset += n;
637
638 /* now read the rest of the message */
639 while (bytes > 0) {
640 if ((n = socket_read (&imap->buf.sock, s, bytes)) <= 0)
641 goto bail;
642 s += n;
643 bytes -= n;
644 }
645
646 if (buffer_gets( &imap->buf, &s ))
647 goto bail;
648 } else if (*s == '"') {
649 /* quoted string */
650 s++;
651 p = s;
652 for (; *s != '"'; s++)
653 if (!*s)
654 goto bail;
655 cur->len = s - p;
656 s++;
657 cur->val = xmalloc( cur->len + 1 );
658 memcpy( cur->val, p, cur->len );
659 cur->val[cur->len] = 0;
660 } else {
661 /* atom */
662 p = s;
663 for (; *s && !isspace( (unsigned char)*s ); s++)
664 if (level && *s == ')')
665 break;
666 cur->len = s - p;
667 if (cur->len == 3 && !memcmp ("NIL", p, 3))
668 cur->val = NIL;
669 else {
670 cur->val = xmalloc( cur->len + 1 );
671 memcpy( cur->val, p, cur->len );
672 cur->val[cur->len] = 0;
673 }
674 }
675
676 if (!level)
677 break;
678 if (!*s)
679 goto bail;
680 }
681 *sp = s;
682 *curp = 0;
683 return 0;
684
685 bail:
686 *curp = 0;
687 return -1;
688 }
689
690 static list_t *
691 parse_imap_list( imap_t *imap, char **sp )
692 {
693 list_t *head;
694
695 if (!parse_imap_list_l( imap, sp, &head, 0 ))
696 return head;
697 free_list( head );
698 return NULL;
699 }
700
701 static list_t *
702 parse_list( char **sp )
703 {
704 return parse_imap_list( 0, sp );
705 }
706
707 static void
708 parse_capability( imap_t *imap, char *cmd )
709 {
710 char *arg;
711 unsigned i;
712
713 imap->caps = 0x80000000;
714 while ((arg = next_arg( &cmd )))
715 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
716 if (!strcmp( cap_list[i], arg ))
717 imap->caps |= 1 << i;
718 imap->rcaps = imap->caps;
719 }
720
721 static int
722 parse_response_code( imap_store_t *ctx, struct imap_cmd_cb *cb, char *s )
723 {
724 imap_t *imap = ctx->imap;
725 char *arg, *p;
726
727 if (*s != '[')
728 return RESP_OK; /* no response code */
729 s++;
730 if (!(p = strchr( s, ']' ))) {
731 fprintf( stderr, "IMAP error: malformed response code\n" );
732 return RESP_BAD;
733 }
734 *p++ = 0;
735 arg = next_arg( &s );
736 if (!strcmp( "UIDVALIDITY", arg )) {
737 if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg ))) {
738 fprintf( stderr, "IMAP error: malformed UIDVALIDITY status\n" );
739 return RESP_BAD;
740 }
741 } else if (!strcmp( "UIDNEXT", arg )) {
742 if (!(arg = next_arg( &s )) || !(imap->uidnext = atoi( arg ))) {
743 fprintf( stderr, "IMAP error: malformed NEXTUID status\n" );
744 return RESP_BAD;
745 }
746 } else if (!strcmp( "CAPABILITY", arg )) {
747 parse_capability( imap, s );
748 } else if (!strcmp( "ALERT", arg )) {
749 /* RFC2060 says that these messages MUST be displayed
750 * to the user
751 */
752 for (; isspace( (unsigned char)*p ); p++);
753 fprintf( stderr, "*** IMAP ALERT *** %s\n", p );
754 } else if (cb && cb->ctx && !strcmp( "APPENDUID", arg )) {
755 if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg )) ||
756 !(arg = next_arg( &s )) || !(*(int *)cb->ctx = atoi( arg )))
757 {
758 fprintf( stderr, "IMAP error: malformed APPENDUID status\n" );
759 return RESP_BAD;
760 }
761 }
762 return RESP_OK;
763 }
764
765 static int
766 get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd )
767 {
768 imap_t *imap = ctx->imap;
769 struct imap_cmd *cmdp, **pcmdp, *ncmdp;
770 char *cmd, *arg, *arg1, *p;
771 int n, resp, resp2, tag;
772
773 for (;;) {
774 if (buffer_gets( &imap->buf, &cmd ))
775 return RESP_BAD;
776
777 arg = next_arg( &cmd );
778 if (*arg == '*') {
779 arg = next_arg( &cmd );
780 if (!arg) {
781 fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
782 return RESP_BAD;
783 }
784
785 if (!strcmp( "NAMESPACE", arg )) {
786 imap->ns_personal = parse_list( &cmd );
787 imap->ns_other = parse_list( &cmd );
788 imap->ns_shared = parse_list( &cmd );
789 } else if (!strcmp( "OK", arg ) || !strcmp( "BAD", arg ) ||
790 !strcmp( "NO", arg ) || !strcmp( "BYE", arg )) {
791 if ((resp = parse_response_code( ctx, 0, cmd )) != RESP_OK)
792 return resp;
793 } else if (!strcmp( "CAPABILITY", arg ))
794 parse_capability( imap, cmd );
795 else if ((arg1 = next_arg( &cmd ))) {
796 if (!strcmp( "EXISTS", arg1 ))
797 ctx->gen.count = atoi( arg );
798 else if (!strcmp( "RECENT", arg1 ))
799 ctx->gen.recent = atoi( arg );
800 } else {
801 fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
802 return RESP_BAD;
803 }
804 } else if (!imap->in_progress) {
805 fprintf( stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "" );
806 return RESP_BAD;
807 } else if (*arg == '+') {
808 /* This can happen only with the last command underway, as
809 it enforces a round-trip. */
810 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
811 offsetof(struct imap_cmd, next));
812 if (cmdp->cb.data) {
813 n = socket_write( &imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen );
814 free( cmdp->cb.data );
815 cmdp->cb.data = 0;
816 if (n != (int)cmdp->cb.dlen)
817 return RESP_BAD;
818 } else if (cmdp->cb.cont) {
819 if (cmdp->cb.cont( ctx, cmdp, cmd ))
820 return RESP_BAD;
821 } else {
822 fprintf( stderr, "IMAP error: unexpected command continuation request\n" );
823 return RESP_BAD;
824 }
825 if (socket_write( &imap->buf.sock, "\r\n", 2 ) != 2)
826 return RESP_BAD;
827 if (!cmdp->cb.cont)
828 imap->literal_pending = 0;
829 if (!tcmd)
830 return DRV_OK;
831 } else {
832 tag = atoi( arg );
833 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
834 if (cmdp->tag == tag)
835 goto gottag;
836 fprintf( stderr, "IMAP error: unexpected tag %s\n", arg );
837 return RESP_BAD;
838 gottag:
839 if (!(*pcmdp = cmdp->next))
840 imap->in_progress_append = pcmdp;
841 imap->num_in_progress--;
842 if (cmdp->cb.cont || cmdp->cb.data)
843 imap->literal_pending = 0;
844 arg = next_arg( &cmd );
845 if (!strcmp( "OK", arg ))
846 resp = DRV_OK;
847 else {
848 if (!strcmp( "NO", arg )) {
849 if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp( cmd, "[TRYCREATE]", 11 ))) { /* SELECT, APPEND or UID COPY */
850 p = strchr( cmdp->cmd, '"' );
851 if (!issue_imap_cmd( ctx, 0, "CREATE \"%.*s\"", strchr( p + 1, '"' ) - p + 1, p )) {
852 resp = RESP_BAD;
853 goto normal;
854 }
855 /* not waiting here violates the spec, but a server that does not
856 grok this nonetheless violates it too. */
857 cmdp->cb.create = 0;
858 if (!(ncmdp = issue_imap_cmd( ctx, &cmdp->cb, "%s", cmdp->cmd ))) {
859 resp = RESP_BAD;
860 goto normal;
861 }
862 free( cmdp->cmd );
863 free( cmdp );
864 if (!tcmd)
865 return 0; /* ignored */
866 if (cmdp == tcmd)
867 tcmd = ncmdp;
868 continue;
869 }
870 resp = RESP_NO;
871 } else /*if (!strcmp( "BAD", arg ))*/
872 resp = RESP_BAD;
873 fprintf( stderr, "IMAP command '%s' returned response (%s) - %s\n",
874 memcmp (cmdp->cmd, "LOGIN", 5) ?
875 cmdp->cmd : "LOGIN <user> <pass>",
876 arg, cmd ? cmd : "");
877 }
878 if ((resp2 = parse_response_code( ctx, &cmdp->cb, cmd )) > resp)
879 resp = resp2;
880 normal:
881 if (cmdp->cb.done)
882 cmdp->cb.done( ctx, cmdp, resp );
883 if (cmdp->cb.data)
884 free( cmdp->cb.data );
885 free( cmdp->cmd );
886 free( cmdp );
887 if (!tcmd || tcmd == cmdp)
888 return resp;
889 }
890 }
891 /* not reached */
892 }
893
894 static void
895 imap_close_server( imap_store_t *ictx )
896 {
897 imap_t *imap = ictx->imap;
898
899 if (imap->buf.sock.fd != -1) {
900 imap_exec( ictx, 0, "LOGOUT" );
901 close( imap->buf.sock.fd );
902 }
903 free_list( imap->ns_personal );
904 free_list( imap->ns_other );
905 free_list( imap->ns_shared );
906 free( imap );
907 }
908
909 static void
910 imap_close_store( store_t *ctx )
911 {
912 imap_close_server( (imap_store_t *)ctx );
913 free_generic_messages( ctx->msgs );
914 free( ctx );
915 }
916
917 static store_t *
918 imap_open_store( imap_server_conf_t *srvc )
919 {
920 imap_store_t *ctx;
921 imap_t *imap;
922 char *arg, *rsp;
923 struct hostent *he;
924 struct sockaddr_in addr;
925 int s, a[2], preauth;
926
927 ctx = xcalloc( sizeof(*ctx), 1 );
928
929 ctx->imap = imap = xcalloc( sizeof(*imap), 1 );
930 imap->buf.sock.fd = -1;
931 imap->in_progress_append = &imap->in_progress;
932
933 /* open connection to IMAP server */
934
935 if (srvc->tunnel) {
936 info( "Starting tunnel '%s'... ", srvc->tunnel );
937
938 if (socketpair( PF_UNIX, SOCK_STREAM, 0, a )) {
939 perror( "socketpair" );
940 exit( 1 );
941 }
942
943 if (fork() == 0) {
944 if (dup2( a[0], 0 ) == -1 || dup2( a[0], 1 ) == -1)
945 _exit( 127 );
946 close( a[0] );
947 close( a[1] );
948 execl( "/bin/sh", "sh", "-c", srvc->tunnel, NULL );
949 _exit( 127 );
950 }
951
952 close (a[0]);
953
954 imap->buf.sock.fd = a[1];
955
956 info( "ok\n" );
957 } else {
958 memset( &addr, 0, sizeof(addr) );
959 addr.sin_port = htons( srvc->port );
960 addr.sin_family = AF_INET;
961
962 info( "Resolving %s... ", srvc->host );
963 he = gethostbyname( srvc->host );
964 if (!he) {
965 perror( "gethostbyname" );
966 goto bail;
967 }
968 info( "ok\n" );
969
970 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
971
972 s = socket( PF_INET, SOCK_STREAM, 0 );
973
974 info( "Connecting to %s:%hu... ", inet_ntoa( addr.sin_addr ), ntohs( addr.sin_port ) );
975 if (connect( s, (struct sockaddr *)&addr, sizeof(addr) )) {
976 close( s );
977 perror( "connect" );
978 goto bail;
979 }
980 info( "ok\n" );
981
982 imap->buf.sock.fd = s;
983
984 }
985
986 /* read the greeting string */
987 if (buffer_gets( &imap->buf, &rsp )) {
988 fprintf( stderr, "IMAP error: no greeting response\n" );
989 goto bail;
990 }
991 arg = next_arg( &rsp );
992 if (!arg || *arg != '*' || (arg = next_arg( &rsp )) == NULL) {
993 fprintf( stderr, "IMAP error: invalid greeting response\n" );
994 goto bail;
995 }
996 preauth = 0;
997 if (!strcmp( "PREAUTH", arg ))
998 preauth = 1;
999 else if (strcmp( "OK", arg ) != 0) {
1000 fprintf( stderr, "IMAP error: unknown greeting response\n" );
1001 goto bail;
1002 }
1003 parse_response_code( ctx, 0, rsp );
1004 if (!imap->caps && imap_exec( ctx, 0, "CAPABILITY" ) != RESP_OK)
1005 goto bail;
1006
1007 if (!preauth) {
1008
1009 info ("Logging in...\n");
1010 if (!srvc->user) {
1011 fprintf( stderr, "Skipping server %s, no user\n", srvc->host );
1012 goto bail;
1013 }
1014 if (!srvc->pass) {
1015 char prompt[80];
1016 sprintf( prompt, "Password (%s@%s): ", srvc->user, srvc->host );
1017 arg = getpass( prompt );
1018 if (!arg) {
1019 perror( "getpass" );
1020 exit( 1 );
1021 }
1022 if (!*arg) {
1023 fprintf( stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host );
1024 goto bail;
1025 }
1026 /*
1027 * getpass() returns a pointer to a static buffer. make a copy
1028 * for long term storage.
1029 */
1030 srvc->pass = strdup( arg );
1031 }
1032 if (CAP(NOLOGIN)) {
1033 fprintf( stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host );
1034 goto bail;
1035 }
1036 warn( "*** IMAP Warning *** Password is being sent in the clear\n" );
1037 if (imap_exec( ctx, 0, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass ) != RESP_OK) {
1038 fprintf( stderr, "IMAP error: LOGIN failed\n" );
1039 goto bail;
1040 }
1041 } /* !preauth */
1042
1043 ctx->prefix = "";
1044 ctx->trashnc = 1;
1045 return (store_t *)ctx;
1046
1047 bail:
1048 imap_close_store( &ctx->gen );
1049 return 0;
1050 }
1051
1052 static int
1053 imap_make_flags( int flags, char *buf )
1054 {
1055 const char *s;
1056 unsigned i, d;
1057
1058 for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1059 if (flags & (1 << i)) {
1060 buf[d++] = ' ';
1061 buf[d++] = '\\';
1062 for (s = Flags[i]; *s; s++)
1063 buf[d++] = *s;
1064 }
1065 buf[0] = '(';
1066 buf[d++] = ')';
1067 return d;
1068 }
1069
1070 #define TUIDL 8
1071
1072 static int
1073 imap_store_msg( store_t *gctx, msg_data_t *data, int *uid )
1074 {
1075 imap_store_t *ctx = (imap_store_t *)gctx;
1076 imap_t *imap = ctx->imap;
1077 struct imap_cmd_cb cb;
1078 char *fmap, *buf;
1079 const char *prefix, *box;
1080 int ret, i, j, d, len, extra, nocr;
1081 int start, sbreak = 0, ebreak = 0;
1082 char flagstr[128], tuid[TUIDL * 2 + 1];
1083
1084 memset( &cb, 0, sizeof(cb) );
1085
1086 fmap = data->data;
1087 len = data->len;
1088 nocr = !data->crlf;
1089 extra = 0, i = 0;
1090 if (!CAP(UIDPLUS) && uid) {
1091 nloop:
1092 start = i;
1093 while (i < len)
1094 if (fmap[i++] == '\n') {
1095 extra += nocr;
1096 if (i - 2 + nocr == start) {
1097 sbreak = ebreak = i - 2 + nocr;
1098 goto mktid;
1099 }
1100 if (!memcmp( fmap + start, "X-TUID: ", 8 )) {
1101 extra -= (ebreak = i) - (sbreak = start) + nocr;
1102 goto mktid;
1103 }
1104 goto nloop;
1105 }
1106 /* invalid message */
1107 free( fmap );
1108 return DRV_MSG_BAD;
1109 mktid:
1110 for (j = 0; j < TUIDL; j++)
1111 sprintf( tuid + j * 2, "%02x", arc4_getbyte() );
1112 extra += 8 + TUIDL * 2 + 2;
1113 }
1114 if (nocr)
1115 for (; i < len; i++)
1116 if (fmap[i] == '\n')
1117 extra++;
1118
1119 cb.dlen = len + extra;
1120 buf = cb.data = xmalloc( cb.dlen );
1121 i = 0;
1122 if (!CAP(UIDPLUS) && uid) {
1123 if (nocr) {
1124 for (; i < sbreak; i++)
1125 if (fmap[i] == '\n') {
1126 *buf++ = '\r';
1127 *buf++ = '\n';
1128 } else
1129 *buf++ = fmap[i];
1130 } else {
1131 memcpy( buf, fmap, sbreak );
1132 buf += sbreak;
1133 }
1134 memcpy( buf, "X-TUID: ", 8 );
1135 buf += 8;
1136 memcpy( buf, tuid, TUIDL * 2 );
1137 buf += TUIDL * 2;
1138 *buf++ = '\r';
1139 *buf++ = '\n';
1140 i = ebreak;
1141 }
1142 if (nocr) {
1143 for (; i < len; i++)
1144 if (fmap[i] == '\n') {
1145 *buf++ = '\r';
1146 *buf++ = '\n';
1147 } else
1148 *buf++ = fmap[i];
1149 } else
1150 memcpy( buf, fmap + i, len - i );
1151
1152 free( fmap );
1153
1154 d = 0;
1155 if (data->flags) {
1156 d = imap_make_flags( data->flags, flagstr );
1157 flagstr[d++] = ' ';
1158 }
1159 flagstr[d] = 0;
1160
1161 if (!uid) {
1162 box = gctx->conf->trash;
1163 prefix = ctx->prefix;
1164 cb.create = 1;
1165 if (ctx->trashnc)
1166 imap->caps = imap->rcaps & ~(1 << LITERALPLUS);
1167 } else {
1168 box = gctx->name;
1169 prefix = !strcmp( box, "INBOX" ) ? "" : ctx->prefix;
1170 cb.create = 0;
1171 }
1172 cb.ctx = uid;
1173 ret = imap_exec_m( ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr );
1174 imap->caps = imap->rcaps;
1175 if (ret != DRV_OK)
1176 return ret;
1177 if (!uid)
1178 ctx->trashnc = 0;
1179 else
1180 gctx->count++;
1181
1182 return DRV_OK;
1183 }
1184
1185 #define CHUNKSIZE 0x1000
1186
1187 static int
1188 read_message( FILE *f, msg_data_t *msg )
1189 {
1190 int len, r;
1191
1192 memset( msg, 0, sizeof *msg );
1193 len = CHUNKSIZE;
1194 msg->data = xmalloc( len+1 );
1195 msg->data[0] = 0;
1196
1197 while(!feof( f )) {
1198 if (msg->len >= len) {
1199 void *p;
1200 len += CHUNKSIZE;
1201 p = xrealloc(msg->data, len+1);
1202 if (!p)
1203 break;
1204 }
1205 r = fread( &msg->data[msg->len], 1, len - msg->len, f );
1206 if (r <= 0)
1207 break;
1208 msg->len += r;
1209 }
1210 msg->data[msg->len] = 0;
1211 return msg->len;
1212 }
1213
1214 static int
1215 count_messages( msg_data_t *msg )
1216 {
1217 int count = 0;
1218 char *p = msg->data;
1219
1220 while (1) {
1221 if (!strncmp( "From ", p, 5 )) {
1222 count++;
1223 p += 5;
1224 }
1225 p = strstr( p+5, "\nFrom ");
1226 if (!p)
1227 break;
1228 p++;
1229 }
1230 return count;
1231 }
1232
1233 static int
1234 split_msg( msg_data_t *all_msgs, msg_data_t *msg, int *ofs )
1235 {
1236 char *p, *data;
1237
1238 memset( msg, 0, sizeof *msg );
1239 if (*ofs >= all_msgs->len)
1240 return 0;
1241
1242 data = &all_msgs->data[ *ofs ];
1243 msg->len = all_msgs->len - *ofs;
1244
1245 if (msg->len < 5 || strncmp( data, "From ", 5 ))
1246 return 0;
1247
1248 p = strstr( data, "\nFrom " );
1249 if (p)
1250 msg->len = &p[1] - data;
1251
1252 msg->data = xmalloc( msg->len + 1 );
1253 if (!msg->data)
1254 return 0;
1255
1256 memcpy( msg->data, data, msg->len );
1257 msg->data[ msg->len ] = 0;
1258
1259 *ofs += msg->len;
1260 return 1;
1261 }
1262
1263 static imap_server_conf_t server =
1264 {
1265 NULL, /* name */
1266 NULL, /* tunnel */
1267 NULL, /* host */
1268 0, /* port */
1269 NULL, /* user */
1270 NULL, /* pass */
1271 };
1272
1273 static char *imap_folder;
1274
1275 static int
1276 git_imap_config(const char *key, const char *val)
1277 {
1278 char imap_key[] = "imap.";
1279
1280 if (strncmp( key, imap_key, sizeof imap_key - 1 ))
1281 return 0;
1282 key += sizeof imap_key - 1;
1283
1284 if (!strcmp( "folder", key )) {
1285 imap_folder = strdup( val );
1286 } else if (!strcmp( "host", key )) {
1287 {
1288 if (!strncmp( "imap:", val, 5 ))
1289 val += 5;
1290 if (!server.port)
1291 server.port = 143;
1292 }
1293 if (!strncmp( "//", val, 2 ))
1294 val += 2;
1295 server.host = strdup( val );
1296 }
1297 else if (!strcmp( "user", key ))
1298 server.user = strdup( val );
1299 else if (!strcmp( "pass", key ))
1300 server.pass = strdup( val );
1301 else if (!strcmp( "port", key ))
1302 server.port = git_config_int( key, val );
1303 else if (!strcmp( "tunnel", key ))
1304 server.tunnel = strdup( val );
1305 return 0;
1306 }
1307
1308 int
1309 main(int argc, char **argv)
1310 {
1311 msg_data_t all_msgs, msg;
1312 store_t *ctx = 0;
1313 int uid = 0;
1314 int ofs = 0;
1315 int r;
1316 int total, n = 0;
1317
1318 /* init the random number generator */
1319 arc4_init();
1320
1321 git_config( git_imap_config );
1322
1323 if (!imap_folder) {
1324 fprintf( stderr, "no imap store specified\n" );
1325 return 1;
1326 }
1327
1328 /* read the messages */
1329 if (!read_message( stdin, &all_msgs )) {
1330 fprintf(stderr,"nothing to send\n");
1331 return 1;
1332 }
1333
1334 /* write it to the imap server */
1335 ctx = imap_open_store( &server );
1336 if (!ctx) {
1337 fprintf( stderr,"failed to open store\n");
1338 return 1;
1339 }
1340
1341 total = count_messages( &all_msgs );
1342 fprintf( stderr, "sending %d message%s\n", total, (total!=1)?"s":"" );
1343 ctx->name = imap_folder;
1344 while (1) {
1345 unsigned percent = n * 100 / total;
1346 fprintf( stderr, "%4u%% (%d/%d) done\r", percent, n, total );
1347 if (!split_msg( &all_msgs, &msg, &ofs ))
1348 break;
1349 r = imap_store_msg( ctx, &msg, &uid );
1350 if (r != DRV_OK) break;
1351 n++;
1352 }
1353 fprintf( stderr,"\n" );
1354
1355 imap_close_store( ctx );
1356
1357 return 0;
1358 }
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