imapext-2007
view src/osdep/dos/mtxdos.c @ 0:ada5e610ab86
imap-2007e
| author | yuuji@gentei.org |
|---|---|
| date | Mon, 14 Sep 2009 15:17:45 +0900 |
| parents | |
| children |
line source
1 /* ========================================================================
2 * Copyright 1988-2006 University of Washington
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 *
11 * ========================================================================
12 */
14 /*
15 * Program: MTX mail routines
16 *
17 * Author: Mark Crispin
18 * Networks and Distributed Computing
19 * Computing & Communications
20 * University of Washington
21 * Administration Building, AG-44
22 * Seattle, WA 98195
23 * Internet: MRC@CAC.Washington.EDU
24 *
25 * Date: 24 June 1992
26 * Last Edited: 30 August 2006
27 */
30 #include <ctype.h>
31 #include <errno.h>
32 #include <fcntl.h>
33 #include "mail.h"
34 #include "osdep.h"
35 #include <time.h>
36 #include <sys\stat.h>
37 #include <dos.h>
38 #include "rfc822.h"
39 #include "dummy.h"
40 #include "misc.h"
41 #include "fdstring.h"
43 /* MTX I/O stream local data */
45 typedef struct mtx_local {
46 int fd; /* file descriptor for I/O */
47 off_t filesize; /* file size parsed */
48 unsigned char *buf; /* temporary buffer */
49 } MTXLOCAL;
52 /* Drive-dependent data passed to init method */
54 typedef struct mtx_data {
55 int fd; /* file data */
56 unsigned long pos; /* initial position */
57 } MTXDATA;
60 /* Convenient access to local data */
62 #define LOCAL ((MTXLOCAL *) stream->local)
65 /* Function prototypes */
67 DRIVER *mtx_valid (char *name);
68 long mtx_isvalid (char *name,char *tmp);
69 void *mtx_parameters (long function,void *value);
70 void mtx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
71 void mtx_list (MAILSTREAM *stream,char *ref,char *pat);
72 void mtx_lsub (MAILSTREAM *stream,char *ref,char *pat);
73 long mtx_create (MAILSTREAM *stream,char *mailbox);
74 long mtx_delete (MAILSTREAM *stream,char *mailbox);
75 long mtx_rename (MAILSTREAM *stream,char *old,char *newname);
76 MAILSTREAM *mtx_open (MAILSTREAM *stream);
77 void mtx_close (MAILSTREAM *stream,long options);
78 char *mtx_header (MAILSTREAM *stream,unsigned long msgno,
79 unsigned long *length,long flags);
80 long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
81 void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
82 long mtx_ping (MAILSTREAM *stream);
83 void mtx_check (MAILSTREAM *stream);
84 long mtx_expunge (MAILSTREAM *stream,char *sequence,long options);
85 long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
86 long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
88 char *mtx_file (char *dst,char *name);
89 long mtx_badname (char *tmp,char *s);
90 long mtx_parse (MAILSTREAM *stream);
91 void mtx_update_status (MAILSTREAM *stream,unsigned long msgno);
92 unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
93 unsigned long *size);
95 /* MTX mail routines */
98 /* Driver dispatch used by MAIL */
100 DRIVER mtxdriver = {
101 "mtx", /* driver name */
102 /* driver flags */
103 DR_LOCAL|DR_MAIL|DR_LOWMEM|DR_CRLF|DR_NOSTICKY,
104 (DRIVER *) NIL, /* next driver */
105 mtx_valid, /* mailbox is valid for us */
106 mtx_parameters, /* manipulate parameters */
107 mtx_scan, /* scan mailboxes */
108 mtx_list, /* list mailboxes */
109 mtx_lsub, /* list subscribed mailboxes */
110 NIL, /* subscribe to mailbox */
111 NIL, /* unsubscribe from mailbox */
112 mtx_create, /* create mailbox */
113 mtx_delete, /* delete mailbox */
114 mtx_rename, /* rename mailbox */
115 mail_status_default, /* status of mailbox */
116 mtx_open, /* open mailbox */
117 mtx_close, /* close mailbox */
118 NIL, /* fetch message "fast" attributes */
119 NIL, /* fetch message flags */
120 NIL, /* fetch overview */
121 NIL, /* fetch message envelopes */
122 mtx_header, /* fetch message header */
123 mtx_text, /* fetch message body */
124 NIL, /* fetch partial message text */
125 NIL, /* unique identifier */
126 NIL, /* message number */
127 NIL, /* modify flags */
128 mtx_flagmsg, /* per-message modify flags */
129 NIL, /* search for message based on criteria */
130 NIL, /* sort messages */
131 NIL, /* thread messages */
132 mtx_ping, /* ping mailbox to see if still alive */
133 mtx_check, /* check for new messages */
134 mtx_expunge, /* expunge deleted messages */
135 mtx_copy, /* copy messages to another mailbox */
136 mtx_append, /* append string message to mailbox */
137 NIL /* garbage collect stream */
138 };
140 /* prototype stream */
141 MAILSTREAM mtxproto = {&mtxdriver};
143 /* MTX mail validate mailbox
144 * Accepts: mailbox name
145 * Returns: our driver if name is valid, NIL otherwise
146 */
148 DRIVER *mtx_valid (char *name)
149 {
150 char tmp[MAILTMPLEN];
151 return mtx_isvalid (name,tmp) ? &mtxdriver : (DRIVER *) NIL;
152 }
155 /* MTX mail test for valid mailbox
156 * Accepts: mailbox name
157 * Returns: T if valid, NIL otherwise
158 */
160 long mtx_isvalid (char *name,char *tmp)
161 {
162 int fd;
163 long ret = NIL;
164 char *s;
165 struct stat sbuf;
166 errno = EINVAL; /* assume invalid argument */
167 /* if file, get its status */
168 if ((*name != '{') && mailboxfile (tmp,name) && !stat (tmp,&sbuf)) {
169 if (!sbuf.st_size)errno = 0;/* empty file */
170 else if ((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) >= 0) {
171 memset (tmp,'\0',MAILTMPLEN);
172 if ((read (fd,tmp,64) >= 0) && (s = strchr (tmp,'\015')) &&
173 (s[1] == '\012')) { /* valid format? */
174 *s = '\0'; /* tie off header */
175 /* must begin with dd-mmm-yy" */
176 ret = (((tmp[2] == '-' && tmp[6] == '-') ||
177 (tmp[1] == '-' && tmp[5] == '-')) &&
178 (s = strchr (tmp+18,',')) && strchr (s+2,';')) ? T : NIL;
179 }
180 else errno = -1; /* bogus format */
181 close (fd); /* close the file */
182 }
183 }
184 /* in case INBOX but not mtx format */
185 else if ((errno == ENOENT) && ((name[0] == 'I') || (name[0] == 'i')) &&
186 ((name[1] == 'N') || (name[1] == 'n')) &&
187 ((name[2] == 'B') || (name[2] == 'b')) &&
188 ((name[3] == 'O') || (name[3] == 'o')) &&
189 ((name[4] == 'X') || (name[4] == 'x')) && !name[5]) errno = -1;
190 return ret; /* return what we should */
191 }
194 /* MTX manipulate driver parameters
195 * Accepts: function code
196 * function-dependent value
197 * Returns: function-dependent return value
198 */
200 void *mtx_parameters (long function,void *value)
201 {
202 return NIL;
203 }
205 /* MTX mail scan mailboxes
206 * Accepts: mail stream
207 * reference
208 * pattern to search
209 * string to scan
210 */
212 void mtx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
213 {
214 if (stream) dummy_scan (NIL,ref,pat,contents);
215 }
218 /* MTX mail list mailboxes
219 * Accepts: mail stream
220 * reference
221 * pattern to search
222 */
224 void mtx_list (MAILSTREAM *stream,char *ref,char *pat)
225 {
226 if (stream) dummy_list (stream,ref,pat);
227 }
230 /* MTX mail list subscribed mailboxes
231 * Accepts: mail stream
232 * reference
233 * pattern to search
234 */
236 void mtx_lsub (MAILSTREAM *stream,char *ref,char *pat)
237 {
238 if (stream) dummy_lsub (stream,ref,pat);
239 }
241 /* MTX mail create mailbox
242 * Accepts: MAIL stream
243 * mailbox name to create
244 * Returns: T on success, NIL on failure
245 */
247 long mtx_create (MAILSTREAM *stream,char *mailbox)
248 {
249 return dummy_create (stream,mailbox);
250 }
253 /* MTX mail delete mailbox
254 * Accepts: MAIL stream
255 * mailbox name to delete
256 * Returns: T on success, NIL on failure
257 */
259 long mtx_delete (MAILSTREAM *stream,char *mailbox)
260 {
261 return dummy_delete (stream,mailbox);
262 }
265 /* MTX mail rename mailbox
266 * Accepts: MAIL stream
267 * old mailbox name
268 * new mailbox name (or NIL for delete)
269 * Returns: T on success, NIL on failure
270 */
272 long mtx_rename (MAILSTREAM *stream,char *old,char *newname)
273 {
274 return dummy_rename (stream,old,newname);
275 }
277 /* MTX mail open
278 * Accepts: stream to open
279 * Returns: stream on success, NIL on failure
280 */
282 MAILSTREAM *mtx_open (MAILSTREAM *stream)
283 {
284 long i;
285 int fd;
286 char *s;
287 char tmp[MAILTMPLEN];
288 /* return prototype for OP_PROTOTYPE call */
289 if (!stream) return &mtxproto;
290 if (stream->local) fatal ("mtx recycle stream");
291 if (!mailboxfile (tmp,stream->mailbox))
292 return (MAILSTREAM *) mtx_badname (tmp,stream->mailbox);
293 /* open, possibly creating INBOX */
294 if (((fd = open (tmp,O_BINARY|(stream->rdonly ? O_RDONLY:O_RDWR),NIL)) < 0)&&
295 (compare_cstring (stream->mailbox,"INBOX") ||
296 ((fd = open (tmp,O_BINARY|O_RDWR|O_CREAT|O_EXCL,S_IREAD|S_IWRITE))<0))){
297 sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
298 mm_log (tmp,ERROR);
299 return NIL;
300 }
301 stream->local = fs_get (sizeof (MTXLOCAL));
302 /* canonicalize the stream mailbox name */
303 fs_give ((void **) &stream->mailbox);
304 if (s = strchr ((s = strrchr (tmp,'\\')) ? s : tmp,'.')) *s = '\0';
305 stream->mailbox = cpystr (tmp);
306 LOCAL->fd = fd; /* note the file */
307 LOCAL->filesize = 0; /* initialize parsed file size */
308 LOCAL->buf = NIL; /* initially no local buffer */
309 stream->sequence++; /* bump sequence number */
310 stream->uid_validity = time (0);
311 /* parse mailbox */
312 stream->nmsgs = stream->recent = 0;
313 if (!mtx_ping (stream)) return NIL;
314 if (!stream->nmsgs) mm_log ("Mailbox is empty",(long) NIL);
315 stream->perm_seen = stream->perm_deleted =
316 stream->perm_flagged = stream->perm_answered = stream->perm_draft =
317 stream->rdonly ? NIL : T;
318 stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
319 return stream; /* return stream to caller */
320 }
322 /* MTX mail close
323 * Accepts: MAIL stream
324 * close options
325 */
327 void mtx_close (MAILSTREAM *stream,long options)
328 {
329 if (stream && LOCAL) { /* only if a file is open */
330 int silent = stream->silent;
331 stream->silent = T;
332 if (options & CL_EXPUNGE) mtx_expunge (stream,NIL,NIL);
333 close (LOCAL->fd); /* close the local file */
334 if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
335 /* nuke the local data */
336 fs_give ((void **) &stream->local);
337 stream->dtb = NIL; /* log out the DTB */
338 }
339 }
341 /* MTX mail fetch message header
342 * Accepts: MAIL stream
343 * message # to fetch
344 * pointer to returned header text length
345 * option flags
346 * Returns: message header in RFC822 format
347 */
349 char *mtx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
350 long flags)
351 {
352 *length = 0; /* default to empty */
353 if (flags & FT_UID) return "";/* UID call "impossible" */
354 /* get to header position */
355 lseek (LOCAL->fd,mtx_hdrpos (stream,msgno,length),L_SET);
356 /* is buffer big enough? */
357 if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
358 LOCAL->buf = (char *) fs_get ((size_t) *length + 1);
359 LOCAL->buf[*length] = '\0'; /* tie off string */
360 /* slurp the data */
361 read (LOCAL->fd,LOCAL->buf,(size_t) *length);
362 return LOCAL->buf;
363 }
366 /* MTX mail fetch message text (body only)
367 * Accepts: MAIL stream
368 * message # to fetch
369 * pointer to returned header text length
370 * option flags
371 * Returns: T, always
372 */
374 long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
375 {
376 MESSAGECACHE *elt;
377 FDDATA d;
378 unsigned long hdrsize,hdrpos;
379 /* UID call "impossible" */
380 if (flags & FT_UID) return NIL;
381 elt = mail_elt (stream,msgno);/* if message not seen */
382 if (elt->seen && !(flags & FT_PEEK)) {
383 elt->seen = T; /* mark message as seen */
384 /* recalculate status */
385 mtx_update_status (stream,msgno);
386 mm_flags (stream,msgno);
387 }
388 /* get location of text data */
389 hdrpos = mtx_hdrpos (stream,msgno,&hdrsize);
390 d.fd = LOCAL->fd; /* set initial stringstruct */
391 d.pos = hdrpos + hdrsize;
392 /* flush old buffer */
393 if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
394 d.chunk = LOCAL->buf = (char *) fs_get ((size_t) d.chunksize = CHUNKSIZE);
395 INIT (bs,fd_string,(void *) &d,elt->rfc822_size - hdrsize);
396 return T; /* success */
397 }
399 /* MTX mail per-message modify flags
400 * Accepts: MAIL stream
401 * message cache element
402 */
404 void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
405 {
406 /* recalculate status */
407 mtx_update_status (stream,elt->msgno);
408 }
411 /* MTX mail ping mailbox
412 * Accepts: MAIL stream
413 * Returns: T if stream still alive, NIL if not
414 */
416 long mtx_ping (MAILSTREAM *stream)
417 {
418 /* punt if stream no longer alive */
419 if (!(stream && LOCAL)) return NIL;
420 /* parse mailbox, punt if parse dies */
421 return (mtx_parse (stream)) ? T : NIL;
422 }
425 /* MTX mail check mailbox (reparses status too)
426 * Accepts: MAIL stream
427 */
429 void mtx_check (MAILSTREAM *stream)
430 {
431 unsigned long i = 1;
432 if (mtx_ping (stream)) { /* ping mailbox */
433 /* get new message status */
434 while (i <= stream->nmsgs) mail_elt (stream,i++);
435 mm_log ("Check completed",(long) NIL);
436 }
437 }
439 /* MTX mail expunge mailbox
440 * Accepts: MAIL stream
441 * sequence to expunge if non-NIL
442 * expunge options
443 * Returns: T, always
444 */
446 long mtx_expunge (MAILSTREAM *stream,char *sequence,long options)
447 {
448 long ret;
449 unsigned long i = 1;
450 unsigned long j,k,m,recent;
451 unsigned long n = 0;
452 unsigned long delta = 0;
453 MESSAGECACHE *elt;
454 char tmp[MAILTMPLEN];
455 if (!(ret = (sequence ? ((options & EX_UID) ?
456 mail_uid_sequence (stream,sequence) :
457 mail_sequence (stream,sequence)) : LONGT) &&
458 mtx_ping (stream))); /* parse sequence if given, ping stream */
459 else if (stream->rdonly) mm_log ("Expunge ignored on readonly mailbox",WARN);
460 else {
461 mm_critical (stream); /* go critical */
462 recent = stream->recent; /* get recent now that pinged */
463 while (i <= stream->nmsgs) {/* for each message */
464 elt = mail_elt (stream,i);/* get cache element */
465 /* number of bytes to smash or preserve */
466 k = elt->private.special.text.size + elt->rfc822_size;
467 /* if need to expunge this message */
468 if (elt->deleted && (sequence ? elt->sequence : T)) {
469 /* if recent, note one less recent message */
470 if (elt->recent) --recent;
471 delta += k; /* number of bytes to delete */
472 /* notify upper levels */
473 mail_expunged (stream,i);
474 n++; /* count up one more deleted message */
475 }
476 else if (i++ && delta) { /* preserved message */
477 /* first byte to preserve */
478 j = elt->private.special.offset;
479 do { /* read from source position */
480 m = min (k,(unsigned long) MAILTMPLEN);
481 lseek (LOCAL->fd,j,SEEK_SET);
482 read (LOCAL->fd,tmp,(size_t) m);
483 /* write to destination position */
484 lseek (LOCAL->fd,j - delta,SEEK_SET);
485 write (LOCAL->fd,tmp,(size_t) m);
486 j += m; /* next chunk, perhaps */
487 } while (k -= m); /* until done */
488 elt->private.special.offset -= delta;
489 }
490 }
491 if (n) { /* truncate file after last message */
492 chsize (LOCAL->fd,LOCAL->filesize -= delta);
493 sprintf (tmp,"Expunged %ld messages",n);
494 mm_log (tmp,(long) NIL); /* output the news */
495 }
496 else mm_log ("No messages deleted, so no update needed",(long) NIL);
497 mm_nocritical (stream); /* release critical */
498 /* notify upper level of new mailbox size */
499 mail_exists (stream,stream->nmsgs);
500 mail_recent (stream,recent);
501 }
502 return ret;
503 }
505 /* MTX mail copy message(s)
506 * Accepts: MAIL stream
507 * sequence
508 * destination mailbox
509 * copy options
510 * Returns: T if success, NIL if failed
511 */
513 long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
514 {
515 char tmp[MAILTMPLEN];
516 struct stat sbuf;
517 MESSAGECACHE *elt;
518 unsigned long i,j,k;
519 long ret = LONGT;
520 int fd;
521 mailproxycopy_t pc =
522 (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
523 if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
524 mail_sequence (stream,sequence))) return NIL;
525 if (!mtx_isvalid (mailbox,tmp)) switch (errno) {
526 case ENOENT: /* no such file? */
527 mm_notify (stream,"[TRYCREATE] Must create mailbox before append",
528 (long) NIL);
529 return NIL;
530 case 0: /* merely empty file? */
531 break;
532 case EINVAL: /* name is bogus */
533 if (pc) return (*pc) (stream,sequence,mailbox,options);
534 return mtx_badname (tmp,mailbox);
535 default: /* file exists, but not valid format */
536 if (pc) return (*pc) (stream,sequence,mailbox,options);
537 sprintf (tmp,"Not a MTX-format mailbox: %s",mailbox);
538 mm_log (tmp,ERROR);
539 return NIL;
540 }
541 /* open the destination */
542 if (!mailboxfile (tmp,mailbox) ||
543 (fd = open (tmp,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
544 S_IREAD|S_IWRITE)) < 0) {
545 sprintf (tmp,"Unable to open copy mailbox: %s",strerror (errno));
546 mm_log (tmp,ERROR);
547 return NIL;
548 }
550 mm_critical (stream); /* go critical */
551 fstat (fd,&sbuf); /* get current file size */
552 /* for each requested message */
553 for (i = 1; ret && (i <= stream->nmsgs); i++)
554 if ((elt = mail_elt (stream,i))->sequence) {
555 lseek (LOCAL->fd,elt->private.special.offset,SEEK_SET);
556 /* number of bytes to copy */
557 k = elt->private.special.text.size + elt->rfc822_size;
558 do { /* read from source position */
559 j = min (k,(long) MAILTMPLEN);
560 read (LOCAL->fd,tmp,(size_t) j);
561 if (write (fd,tmp,(size_t) j) < 0) {
562 sprintf (tmp,"Unable to write message: %s",strerror (errno));
563 mm_log (tmp,ERROR);
564 chsize (fd,sbuf.st_size);
565 j = k;
566 ret = NIL; /* note error */
567 break;
568 }
569 } while (k -= j); /* until done */
570 }
571 close (fd); /* close the file */
572 mm_nocritical (stream); /* release critical */
573 /* delete all requested messages */
574 if (ret && (options & CP_MOVE)) for (i = 1; i <= stream->nmsgs; i++)
575 if ((elt = mail_elt (stream,i))->sequence) {
576 elt->deleted = T; /* mark message deleted */
577 /* recalculate status */
578 mtx_update_status (stream,i);
579 }
580 if (ret && mail_parameters (NIL,GET_COPYUID,NIL))
581 mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN);
582 return ret;
583 }
585 /* MTX mail append message from stringstruct
586 * Accepts: MAIL stream
587 * destination mailbox
588 * append callback
589 * data for callback
590 * Returns: T if append successful, else NIL
591 */
593 long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
594 {
595 struct stat sbuf;
596 int fd,ld,c;
597 char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN];
598 FILE *df;
599 MESSAGECACHE elt;
600 long f;
601 unsigned long i,uf;
602 STRING *message;
603 long ret = LONGT;
604 /* default stream to prototype */
605 if (!stream) stream = &mtxproto;
606 /* make sure valid mailbox */
607 if (!mtx_isvalid (mailbox,tmp)) switch (errno) {
608 case ENOENT: /* no such file? */
609 if (((mailbox[0] == 'I') || (mailbox[0] == 'i')) &&
610 ((mailbox[1] == 'N') || (mailbox[1] == 'n')) &&
611 ((mailbox[2] == 'B') || (mailbox[2] == 'b')) &&
612 ((mailbox[3] == 'O') || (mailbox[3] == 'o')) &&
613 ((mailbox[4] == 'X') || (mailbox[4] == 'x')) && !mailbox[5])
614 dummy_create (NIL,"INBOX.MTX");
615 else {
616 mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
617 return NIL;
618 }
619 /* falls through */
620 case 0: /* merely empty file? */
621 break;
622 case EINVAL:
623 return mtx_badname (tmp,mailbox);
624 default:
625 sprintf (tmp,"Not a MTX-format mailbox: %.80s",mailbox);
626 mm_log (tmp,ERROR);
627 return NIL;
628 }
629 /* get first message */
630 if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
631 /* open destination mailbox */
632 if (!mailboxfile (file,mailbox) ||
633 ((fd = open (file,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
634 S_IREAD|S_IWRITE)) < 0) || !(df = fdopen (fd,"ab"))) {
635 sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
636 mm_log (tmp,ERROR);
637 return NIL;
638 }
639 mm_critical (stream); /* go critical */
640 fstat (fd,&sbuf); /* get current file size */
642 errno = 0;
643 do { /* parse flags */
644 if (!SIZE (message)) { /* guard against zero-length */
645 mm_log ("Append of zero-length message",ERROR);
646 ret = NIL;
647 break;
648 }
649 f = mail_parse_flags (stream,flags,&i);
650 /* reverse bits (dontcha wish we had CIRC?) */
651 for (uf = 0; i; uf |= 1 << (29 - find_rightmost_bit (&i)));
652 if (date) { /* parse date if given */
653 if (!mail_parse_date (&elt,date)) {
654 sprintf (tmp,"Bad date in append: %.80s",date);
655 mm_log (tmp,ERROR);
656 ret = NIL; /* mark failure */
657 break;
658 }
659 mail_date (tmp,&elt); /* write preseved date */
660 }
661 else internal_date (tmp); /* get current date in IMAP format */
662 /* write header */
663 if (fprintf (df,"%s,%lu;%010lo%02lo\015\012",tmp,i = SIZE (message),uf,
664 (unsigned long) f) < 0) ret = NIL;
665 else { /* write message */
666 if (i) do c = 0xff & SNX (message);
667 while ((putc (c,df) != EOF) && --i);
668 /* get next message */
669 if (i || !(*af) (stream,data,&flags,&date,&message)) ret = NIL;
670 }
671 } while (ret && message);
672 /* revert file if failure */
673 if (!ret || (fflush (df) == EOF)) {
674 chsize (fd,sbuf.st_size); /* revert file */
675 close (fd); /* make sure fclose() doesn't corrupt us */
676 if (errno) {
677 sprintf (tmp,"Message append failed: %s",strerror (errno));
678 mm_log (tmp,ERROR);
679 }
680 ret = NIL;
681 }
682 fclose (df); /* close the file */
683 mm_nocritical (stream); /* release critical */
684 if (ret && mail_parameters (NIL,GET_APPENDUID,NIL))
685 mm_log ("Can not return meaningful APPENDUID with this mailbox format",
686 WARN);
687 return ret;
688 }
691 /* Return bad file name error message
692 * Accepts: temporary buffer
693 * file name
694 * Returns: long NIL always
695 */
697 long mtx_badname (char *tmp,char *s)
698 {
699 sprintf (tmp,"Invalid mailbox name: %s",s);
700 mm_log (tmp,ERROR);
701 return (long) NIL;
702 }
704 /* Parse mailbox
705 * Accepts: MAIL stream
706 * Returns: T if parse OK
707 * NIL if failure, stream aborted
708 */
710 long mtx_parse (MAILSTREAM *stream)
711 {
712 struct stat sbuf;
713 MESSAGECACHE *elt = NIL;
714 unsigned char *s,*t,*x,lbuf[65];
715 char tmp[MAILTMPLEN];
716 long i;
717 long curpos = LOCAL->filesize;
718 long nmsgs = stream->nmsgs;
719 long recent = stream->recent;
720 fstat (LOCAL->fd,&sbuf); /* get status */
721 if (sbuf.st_size < curpos) { /* sanity check */
722 sprintf (tmp,"Mailbox shrank from %ld to %ld!",curpos,sbuf.st_size);
723 mm_log (tmp,ERROR);
724 mtx_close (stream,NIL);
725 return NIL;
726 }
727 /* while there is stuff to parse */
728 while (i = sbuf.st_size - curpos) {
729 /* get to that position in the file */
730 lseek (LOCAL->fd,curpos,SEEK_SET);
731 if ((i = read (LOCAL->fd,lbuf,64)) <= 0) {
732 sprintf (tmp,"Unable to read internal header at %ld, size = %ld: %s",
733 curpos,sbuf.st_size,i ? strerror (errno) : "no data read");
734 mm_log (tmp,ERROR);
735 mtx_close (stream,NIL);
736 return NIL;
737 }
738 lbuf[i] = '\0'; /* tie off buffer just in case */
739 if (!((s = strchr (lbuf,'\015')) && (s[1] == '\012'))) {
740 sprintf (tmp,"Unable to find end of line at %ld in %ld bytes, text: %s",
741 curpos,i,(char *) lbuf);
742 mm_log (tmp,ERROR);
743 mtx_close (stream,NIL);
744 return NIL;
745 }
746 *s = '\0'; /* tie off header line */
747 i = (s + 2) - lbuf; /* note start of text offset */
748 if (!((s = strchr (lbuf,',')) && (t = strchr (s+1,';')))) {
749 sprintf (tmp,"Unable to parse internal header at %ld: %s",curpos,
750 (char *) lbuf);
751 mm_log (tmp,ERROR);
752 mtx_close (stream,NIL);
753 return NIL;
754 }
756 *s++ = '\0'; *t++ = '\0'; /* tie off fields */
757 /* intantiate an elt for this message */
758 (elt = mail_elt (stream,++nmsgs))->valid = T;
759 elt->private.uid = ++stream->uid_last;
760 /* note file offset of header */
761 elt->private.special.offset = curpos;
762 /* as well as offset from header of message */
763 elt->private.special.text.size = i;
764 /* header size not known yet */
765 elt->private.msg.header.text.size = 0;
766 /* parse the header components */
767 if (!(mail_parse_date (elt,lbuf) &&
768 (elt->rfc822_size = strtol (x = s,(char **) &s,10)) && (!(s && *s))&&
769 isdigit (t[0]) && isdigit (t[1]) && isdigit (t[2]) &&
770 isdigit (t[3]) && isdigit (t[4]) && isdigit (t[5]) &&
771 isdigit (t[6]) && isdigit (t[7]) && isdigit (t[8]) &&
772 isdigit (t[9]) && isdigit (t[10]) && isdigit (t[11]) && !t[12])) {
773 sprintf (tmp,"Unable to parse internal header elements at %ld: %s,%s;%s",
774 curpos,(char *) lbuf,(char *) x,(char *) t);
775 mtx_close (stream,NIL);
776 return NIL;
777 }
778 /* update current position to next header */
779 curpos += i + elt->rfc822_size;
780 /* calculate system flags */
781 if ((i = ((t[10]-'0') * 8) + t[11]-'0') & fSEEN) elt->seen = T;
782 if (i & fDELETED) elt->deleted = T;
783 if (i & fFLAGGED) elt->flagged = T;
784 if (i & fANSWERED) elt->answered = T;
785 if (i & fDRAFT) elt->draft = T;
786 if (curpos > sbuf.st_size) {
787 sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
788 elt->private.special.offset,curpos,sbuf.st_size);
789 mm_log (tmp,ERROR);
790 mtx_close (stream,NIL);
791 return NIL;
792 }
793 }
794 /* update parsed file size */
795 LOCAL->filesize = sbuf.st_size;
796 mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
797 mail_recent (stream,recent); /* and of change in recent messages */
798 return T; /* return the winnage */
799 }
801 /* Update status string
802 * Accepts: MAIL stream
803 * message number
804 */
806 void mtx_update_status (MAILSTREAM *stream,unsigned long msgno)
807 {
808 char tmp[MAILTMPLEN];
809 MESSAGECACHE *elt = mail_elt (stream,msgno);
810 unsigned long j,k = 0;
811 /* not if readonly you don't */
812 if (stream->rdonly || !elt->valid) return;
813 j = elt->user_flags; /* get user flags */
814 /* reverse bits (dontcha wish we had CIRC?) */
815 while (j) k |= 1 << 29 - find_rightmost_bit (&j);
816 sprintf (tmp,"%010lo%02o",k, /* print new flag string */
817 fOLD + (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
818 (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
819 (fDRAFT * elt->draft));
820 /* get to that place in the file */
821 lseek (LOCAL->fd,(off_t) elt->private.special.offset +
822 elt->private.special.text.size - 14,SEEK_SET);
823 write (LOCAL->fd,tmp,12); /* write new flags */
824 }
826 /* MTX locate header for a message
827 * Accepts: MAIL stream
828 * message number
829 * pointer to returned header size
830 * Returns: position of header in file
831 */
833 unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
834 unsigned long *size)
835 {
836 unsigned long siz;
837 size_t i = 0;
838 int q = 0;
839 char *s,tmp[MAILTMPLEN];
840 MESSAGECACHE *elt = mail_elt (stream,msgno);
841 long pos = elt->private.special.offset + elt->private.special.text.size;
842 /* is header size known? */
843 if (!(*size = elt->private.msg.header.text.size)) {
844 /* get to header position */
845 lseek (LOCAL->fd,pos,SEEK_SET);
846 /* search message for CRLF CRLF */
847 for (siz = 1; siz <= elt->rfc822_size; siz++) {
848 if (!i && /* buffer empty? */
849 (read (LOCAL->fd,s = tmp,
850 i = (size_t) min(elt->rfc822_size-siz,(long)MAILTMPLEN))<= 0))
851 return pos;
852 else i--;
853 switch (q) { /* sniff at buffer */
854 case 0: /* first character */
855 q = (*s++ == '\015') ? 1 : 0;
856 break;
857 case 1: /* second character */
858 q = (*s++ == '\012') ? 2 : 0;
859 break;
860 case 2: /* third character */
861 q = (*s++ == '\015') ? 3 : 0;
862 break;
863 case 3: /* fourth character */
864 if (*s++ == '\012') { /* have the sequence? */
865 /* yes, note for later */
866 elt->private.msg.header.text.size = (*size = siz);
867 return pos; /* return to caller */
868 }
869 q = 0; /* lost... */
870 break;
871 }
872 }
873 }
874 return pos; /* have position */
875 }