imapext-2007
view src/osdep/dos/bezrkdos.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: Berkeley 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 /* Dedication:
31 * This file is dedicated with affection to those Merry Marvels of Musical
32 * Madness . . .
33 * -> The Incomparable Leland Stanford Junior University Marching Band <-
34 * who entertain, awaken, and outrage Stanford fans in the fact of repeated
35 * losing seasons and shattered Rose Bowl dreams [Cardinal just don't have
36 * HUSKY FEVER!!!].
37 *
38 */
40 #include <ctype.h>
41 #include <errno.h>
42 #include <fcntl.h>
43 #include "mail.h"
44 #include "osdep.h"
45 #include <time.h>
46 #include <sys\stat.h>
47 #include <dos.h>
48 #include "rfc822.h"
49 #include "dummy.h"
50 #include "misc.h"
51 #include "fdstring.h"
53 /* Berkeley I/O stream local data */
55 typedef struct bezerk_local {
56 int fd; /* file descriptor for I/O */
57 off_t filesize; /* file size parsed */
58 char *buf; /* temporary buffer */
59 } BEZERKLOCAL;
62 /* Convenient access to local data */
64 #define LOCAL ((BEZERKLOCAL *) stream->local)
66 /* Function prototypes */
68 DRIVER *bezerk_valid (char *name);
69 long bezerk_isvalid (char *name,char *tmp);
70 int bezerk_valid_line (char *s,char **rx,int *rzn);
71 void *bezerk_parameters (long function,void *value);
72 void bezerk_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
73 void bezerk_list (MAILSTREAM *stream,char *ref,char *pat);
74 void bezerk_lsub (MAILSTREAM *stream,char *ref,char *pat);
75 long bezerk_create (MAILSTREAM *stream,char *mailbox);
76 long bezerk_delete (MAILSTREAM *stream,char *mailbox);
77 long bezerk_rename (MAILSTREAM *stream,char *old,char *newname);
78 MAILSTREAM *bezerk_open (MAILSTREAM *stream);
79 void bezerk_close (MAILSTREAM *stream,long options);
80 char *bezerk_header (MAILSTREAM *stream,unsigned long msgno,
81 unsigned long *length,long flags);
82 long bezerk_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,
83 long flags);
84 long bezerk_ping (MAILSTREAM *stream);
85 void bezerk_check (MAILSTREAM *stream);
86 long bezerk_expunge (MAILSTREAM *stream,char *sequence,long options);
87 long bezerk_copy (MAILSTREAM *stream,char *sequence,char *mailbox,
88 long options);
89 long bezerk_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
90 int bezerk_append_msg (MAILSTREAM *stream,FILE *sf,char *flags,char *date,
91 STRING *msg);
92 void bezerk_gc (MAILSTREAM *stream,long gcflags);
93 char *bezerk_file (char *dst,char *name);
94 long bezerk_badname (char *tmp,char *s);
95 long bezerk_parse (MAILSTREAM *stream);
96 unsigned long bezerk_hdrpos (MAILSTREAM *stream,unsigned long msgno,
97 unsigned long *size);
99 /* Berkeley mail routines */
102 /* Driver dispatch used by MAIL */
104 DRIVER bezerkdriver = {
105 "bezerk", /* driver name */
106 /* driver flags */
107 DR_LOCAL|DR_MAIL|DR_LOWMEM|DR_CRLF|DR_NOSTICKY,
108 (DRIVER *) NIL, /* next driver */
109 bezerk_valid, /* mailbox is valid for us */
110 bezerk_parameters, /* manipulate parameters */
111 bezerk_scan, /* scan mailboxes */
112 bezerk_list, /* list mailboxes */
113 bezerk_lsub, /* list subscribed mailboxes */
114 NIL, /* subscribe to mailbox */
115 NIL, /* unsubscribe from mailbox */
116 bezerk_create, /* create mailbox */
117 bezerk_delete, /* delete mailbox */
118 bezerk_rename, /* rename mailbox */
119 mail_status_default, /* status of mailbox */
120 bezerk_open, /* open mailbox */
121 bezerk_close, /* close mailbox */
122 NIL, /* fetch message "fast" attributes */
123 NIL, /* fetch message flags */
124 NIL, /* fetch overview */
125 NIL, /* fetch message envelopes */
126 bezerk_header, /* fetch message header */
127 bezerk_text, /* fetch message text */
128 NIL, /* fetch partial message text */
129 NIL, /* unique identifier */
130 NIL, /* message number */
131 NIL, /* modify flags */
132 NIL, /* per-message modify flags */
133 NIL, /* search for message based on criteria */
134 NIL, /* sort messages */
135 NIL, /* thread messages */
136 bezerk_ping, /* ping mailbox to see if still alive */
137 bezerk_check, /* check for new messages */
138 bezerk_expunge, /* expunge deleted messages */
139 bezerk_copy, /* copy messages to another mailbox */
140 bezerk_append, /* append string message to mailbox */
141 NIL /* garbage collect stream */
142 };
144 /* prototype stream */
145 MAILSTREAM bezerkproto = {&bezerkdriver};
147 /* Berkeley mail validate mailbox
148 * Accepts: mailbox name
149 * Returns: our driver if name is valid, NIL otherwise
150 */
152 DRIVER *bezerk_valid (char *name)
153 {
154 char tmp[MAILTMPLEN];
155 return bezerk_isvalid (name,tmp) ? &bezerkdriver : (DRIVER *) NIL;
156 }
159 /* Berkeley mail test for valid mailbox
160 * Accepts: mailbox name
161 * Returns: T if valid, NIL otherwise
162 */
164 long bezerk_isvalid (char *name,char *tmp)
165 {
166 int fd;
167 long ret = NIL;
168 struct stat sbuf;
169 errno = EINVAL; /* assume invalid argument */
170 /* if file, get its status */
171 if ((*name != '{') && mailboxfile (tmp,name) && !stat (tmp,&sbuf)) {
172 if (!sbuf.st_size)errno = 0;/* empty file */
173 else if ((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) >= 0) {
174 memset (tmp,'\0',MAILTMPLEN);
175 errno = -1; /* in case bezerk_valid_line fails */
176 if (read (fd,tmp,MAILTMPLEN-1) >= 0)
177 ret = bezerk_valid_line (tmp,NIL,NIL);
178 close (fd); /* close the file */
179 }
180 }
181 /* in case INBOX but not bezerk format */
182 else if ((errno == ENOENT) && ((name[0] == 'I') || (name[0] == 'i')) &&
183 ((name[1] == 'N') || (name[1] == 'n')) &&
184 ((name[2] == 'B') || (name[2] == 'b')) &&
185 ((name[3] == 'O') || (name[3] == 'o')) &&
186 ((name[4] == 'X') || (name[4] == 'x')) && !name[5]) errno = -1;
187 return ret; /* return what we should */
188 }
190 /* Validate line
191 * Accepts: pointer to candidate string to validate as a From header
192 * return pointer to end of date/time field
193 * return pointer to offset from t of time (hours of ``mmm dd hh:mm'')
194 * return pointer to offset from t of time zone (if non-zero)
195 * Returns: t,ti,zn set if valid From string, else ti is NIL
196 */
198 int bezerk_valid_line (char *s,char **rx,int *rzn)
199 {
200 char *x;
201 int zn;
202 int ti = 0;
203 /* line must begin with "From " */
204 if ((*s != 'F') || (s[1] != 'r') || (s[2] != 'o') || (s[3] != 'm') ||
205 (s[4] != ' ')) return NIL;
206 /* find end of line */
207 for (x = s + 5; *x && *x != '\012'; x++);
208 if (!x) return NIL; /* end of line not found */
209 if (x[-1] == '\015') x--; /* ignore CR */
210 if ((x - s < 27)) return NIL; /* line too short */
211 if (x - s >= 41) { /* possible search for " remote from " */
212 for (zn = -1; x[zn] != ' '; zn--);
213 if ((x[zn-1] == 'm') && (x[zn-2] == 'o') && (x[zn-3] == 'r') &&
214 (x[zn-4] == 'f') && (x[zn-5] == ' ') && (x[zn-6] == 'e') &&
215 (x[zn-7] == 't') && (x[zn-8] == 'o') && (x[zn-9] == 'm') &&
216 (x[zn-10] == 'e') && (x[zn-11] == 'r') && (x[zn-12] == ' '))
217 x += zn - 12;
218 }
219 if (x[-5] == ' ') { /* ends with year? */
220 /* no timezone? */
221 if (x[-8] == ':') zn = 0,ti = -5;
222 /* three letter timezone? */
223 else if (x[-9] == ' ') ti = zn = -9;
224 /* numeric timezone? */
225 else if ((x[-11]==' ') && ((x[-10]=='+') || (x[-10]=='-'))) ti = zn = -11;
226 }
227 else if (x[-4] == ' ') { /* no year and three leter timezone? */
228 if (x[-9] == ' ') zn = -4,ti = -9;
229 }
230 else if (x[-6] == ' ') { /* no year and numeric timezone? */
231 if ((x[-11] == ' ') && ((x[-5] == '+') || (x[-5] == '-')))
232 zn = -6,ti = -11;
233 }
234 /* time must be www mmm dd hh:mm[:ss] */
235 if (ti && !((x[ti - 3] == ':') &&
236 (x[ti -= ((x[ti - 6] == ':') ? 9 : 6)] == ' ') &&
237 (x[ti - 3] == ' ') && (x[ti - 7] == ' ') &&
238 (x[ti - 11] == ' '))) return NIL;
239 if (rx) *rx = x; /* set return values */
240 if (rzn) *rzn = zn;
241 return ti;
242 }
244 /* Berkeley manipulate driver parameters
245 * Accepts: function code
246 * function-dependent value
247 * Returns: function-dependent return value
248 */
250 void *bezerk_parameters (long function,void *value)
251 {
252 return NIL;
253 }
256 /* Berkeley mail scan mailboxes
257 * Accepts: mail stream
258 * reference
259 * pattern to search
260 * string to scan
261 */
263 void bezerk_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
264 {
265 if (stream) dummy_scan (NIL,ref,pat,contents);
266 }
269 /* Berkeley mail list mailboxes
270 * Accepts: mail stream
271 * reference
272 * pattern to search
273 */
275 void bezerk_list (MAILSTREAM *stream,char *ref,char *pat)
276 {
277 if (stream) dummy_list (stream,ref,pat);
278 }
281 /* Berkeley mail list subscribed mailboxes
282 * Accepts: mail stream
283 * reference
284 * pattern to search
285 */
287 void bezerk_lsub (MAILSTREAM *stream,char *ref,char *pat)
288 {
289 if (stream) dummy_lsub (stream,ref,pat);
290 }
292 /* Berkeley mail create mailbox
293 * Accepts: MAIL stream
294 * mailbox name to create
295 * Returns: T on success, NIL on failure
296 */
298 long bezerk_create (MAILSTREAM *stream,char *mailbox)
299 {
300 return dummy_create (stream,mailbox);
301 }
304 /* Berkeley mail delete mailbox
305 * Accepts: MAIL stream
306 * mailbox name to delete
307 * Returns: T on success, NIL on failure
308 */
310 long bezerk_delete (MAILSTREAM *stream,char *mailbox)
311 {
312 return dummy_delete (stream,mailbox);
313 }
316 /* Berkeley mail rename mailbox
317 * Accepts: MAIL stream
318 * old mailbox name
319 * new mailbox name (or NIL for delete)
320 * Returns: T on success, NIL on failure
321 */
323 long bezerk_rename (MAILSTREAM *stream,char *old,char *newname)
324 {
325 return dummy_rename (stream,old,newname);
326 }
328 /* Berkeley mail open
329 * Accepts: stream to open
330 * Returns: stream on success, NIL on failure
331 */
333 MAILSTREAM *bezerk_open (MAILSTREAM *stream)
334 {
335 long i;
336 int fd;
337 char *s;
338 char tmp[MAILTMPLEN];
339 /* return prototype for OP_PROTOTYPE call */
340 if (!stream) return &bezerkproto;
341 if (stream->local) fatal ("bezerk recycle stream");
342 if (!mailboxfile (tmp,stream->mailbox))
343 return (MAILSTREAM *) bezerk_badname (tmp,stream->mailbox);
344 if (((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) < 0)) {
345 sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
346 mm_log (tmp,ERROR);
347 return NIL;
348 }
349 stream->rdonly = T; /* this driver is readonly */
350 stream->local = fs_get (sizeof (BEZERKLOCAL));
351 /* canonicalize the stream mailbox name */
352 fs_give ((void **) &stream->mailbox);
353 if (s = strchr ((s = strrchr (tmp,'\\')) ? s : tmp,'.')) *s = '\0';
354 stream->mailbox = cpystr (tmp);
355 LOCAL->fd = fd; /* note the file */
356 LOCAL->filesize = 0; /* initialize parsed file size */
357 LOCAL->buf = NIL; /* initially no local buffer */
358 stream->sequence++; /* bump sequence number */
359 stream->uid_validity = time (0);
360 /* parse mailbox */
361 stream->nmsgs = stream->recent = 0;
362 if (!bezerk_ping (stream)) return NIL;
363 if (!stream->nmsgs) mm_log ("Mailbox is empty",(long) NIL);
364 stream->perm_seen = stream->perm_deleted =
365 stream->perm_flagged = stream->perm_answered = stream->perm_draft = NIL;
366 stream->perm_user_flags = NIL;
367 return stream; /* return stream to caller */
368 }
370 /* Berkeley mail close
371 * Accepts: MAIL stream
372 * close options
373 */
375 void bezerk_close (MAILSTREAM *stream,long options)
376 {
377 if (stream && LOCAL) { /* only if a file is open */
378 int silent = stream->silent;
379 stream->silent = T;
380 if (options & CL_EXPUNGE) bezerk_expunge (stream,NIL,NIL);
381 close (LOCAL->fd); /* close the local file */
382 if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
383 /* nuke the local data */
384 fs_give ((void **) &stream->local);
385 stream->dtb = NIL; /* log out the DTB */
386 }
387 }
389 /* Berkeley mail fetch message header
390 * Accepts: MAIL stream
391 * message # to fetch
392 * pointer to returned header text length
393 * option flags
394 * Returns: message header in RFC822 format
395 */
397 char *bezerk_header (MAILSTREAM *stream,unsigned long msgno,
398 unsigned long *length,long flags)
399 {
400 char tmp[MAILTMPLEN];
401 *length = 0; /* default to empty */
402 if (flags & FT_UID) return "";/* UID call "impossible" */
403 /* get to header position */
404 lseek (LOCAL->fd,bezerk_hdrpos (stream,msgno,length),L_SET);
405 /* is buffer big enough? */
406 if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
407 LOCAL->buf = (char *) fs_get ((size_t) *length + 1);
408 LOCAL->buf[*length] = '\0'; /* tie off string */
409 /* slurp the data */
410 read (LOCAL->fd,LOCAL->buf,(size_t) *length);
411 return LOCAL->buf;
412 }
415 /* Berkeley mail fetch message text (body only)
416 * Accepts: MAIL stream
417 * message # to fetch
418 * pointer to returned header text length
419 * option flags
420 * Returns: T, always
421 */
423 long bezerk_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
424 {
425 MESSAGECACHE *elt;
426 FDDATA d;
427 unsigned long hdrsize,hdrpos;
428 /* UID call "impossible" */
429 if (flags & FT_UID) return NIL;
430 elt = mail_elt (stream,msgno);/* if message not seen */
431 /* mark message as seen */
432 if (elt->seen && !(flags & FT_PEEK)) {
433 elt->seen = T;
434 mm_flags (stream,msgno);
435 }
436 /* get location of text data */
437 hdrpos = bezerk_hdrpos (stream,msgno,&hdrsize);
438 d.fd = LOCAL->fd; /* set initial stringstruct */
439 d.pos = hdrpos + hdrsize;
440 /* flush old buffer */
441 if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
442 d.chunk = LOCAL->buf = (char *) fs_get ((size_t) d.chunksize = CHUNKSIZE);
443 INIT (bs,fd_string,(void *) &d,elt->rfc822_size - hdrsize);
444 return T; /* success */
445 }
447 /* Berkeley mail ping mailbox
448 * Accepts: MAIL stream
449 * Returns: T if stream still alive, NIL if not
450 */
452 long bezerk_ping (MAILSTREAM *stream)
453 {
454 /* punt if stream no longer alive */
455 if (!(stream && LOCAL)) return NIL;
456 /* parse mailbox, punt if parse dies */
457 return (bezerk_parse (stream)) ? T : NIL;
458 }
461 /* Berkeley mail check mailbox (reparses status too)
462 * Accepts: MAIL stream
463 */
465 void bezerk_check (MAILSTREAM *stream)
466 {
467 unsigned long i = 1;
468 if (bezerk_ping (stream)) { /* ping mailbox */
469 /* get new message status */
470 while (i <= stream->nmsgs) mail_elt (stream,i++);
471 mm_log ("Check completed",(long) NIL);
472 }
473 }
475 /* Berkeley mail expunge mailbox
476 * Accepts: MAIL stream
477 * sequence to expunge if non-NIL
478 * expunge options
479 * Returns: T, always
480 */
482 long bezerk_expunge (MAILSTREAM *stream,char *sequence,long options)
483 {
484 if (!stream->silent) mm_log ("Expunge ignored on readonly mailbox",WARN);
485 return LONGT;
486 }
488 /* Berkeley mail copy message(s)
489 * Accepts: MAIL stream
490 * sequence
491 * destination mailbox
492 * copy options
493 * Returns: T if success, NIL if failed
494 */
496 long bezerk_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
497 {
498 char tmp[MAILTMPLEN];
499 struct stat sbuf;
500 MESSAGECACHE *elt;
501 unsigned long i,j,k;
502 int fd;
503 mailproxycopy_t pc =
504 (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
505 if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
506 mail_sequence (stream,sequence))) return NIL;
507 /* make sure valid mailbox */
508 if (!bezerk_isvalid (mailbox,tmp) && errno) {
509 if (errno == ENOENT)
510 mm_notify (stream,"[TRYCREATE] Must create mailbox before append",
511 (long) NIL);
512 else if (pc) return (*pc) (stream,sequence,mailbox,options);
513 else if (mailboxfile (tmp,mailbox)) {
514 sprintf (tmp,"Not a Bezerk-format mailbox: %s",mailbox);
515 mm_log (tmp,ERROR);
516 }
517 else bezerk_badname (tmp,mailbox);
518 return NIL;
519 }
520 /* open the destination */
521 if (!mailboxfile (tmp,mailbox) ||
522 (fd = open (tmp,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
523 S_IREAD|S_IWRITE)) < 0) {
524 sprintf (tmp,"Unable to open copy mailbox: %s",strerror (errno));
525 mm_log (tmp,ERROR);
526 return NIL;
527 }
529 mm_critical (stream); /* go critical */
530 fstat (fd,&sbuf); /* get current file size */
531 /* for each requested message */
532 for (i = 1; i <= stream->nmsgs; i++)
533 if ((elt = mail_elt (stream,i))->sequence) {
534 lseek (LOCAL->fd,elt->private.special.offset,SEEK_SET);
535 /* number of bytes to copy */
536 j = elt->private.msg.full.offset + elt->rfc822_size;
537 do { /* read from source position */
538 k = min (j,(unsigned long) MAILTMPLEN);
539 read (LOCAL->fd,tmp,(unsigned int) k);
540 if (write (fd,tmp,(unsigned int) k) < 0) {
541 sprintf (tmp,"Unable to write message: %s",strerror (errno));
542 mm_log (tmp,ERROR);
543 chsize (fd,sbuf.st_size);
544 close (fd); /* punt */
545 mm_nocritical (stream);
546 return NIL;
547 }
548 } while (j -= k); /* until done */
549 }
550 close (fd); /* close the file */
551 mm_nocritical (stream); /* release critical */
552 /* delete all requested messages */
553 if (options & CP_MOVE) for (i = 1; i <= stream->nmsgs; i++)
554 if ((elt = mail_elt (stream,i))->sequence) elt->deleted = T;
555 if (mail_parameters (NIL,GET_COPYUID,NIL))
556 mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN);
557 return T;
558 }
560 /* Berkeley mail append message from stringstruct
561 * Accepts: MAIL stream
562 * destination mailbox
563 * append callback
564 * data for callback
565 * Returns: T if append successful, else NIL
566 */
568 #define BUFLEN MAILTMPLEN
570 long bezerk_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
571 {
572 struct stat sbuf;
573 int fd;
574 unsigned long i,j;
575 char *flags,*date,buf[BUFLEN],tmp[MAILTMPLEN],file[MAILTMPLEN];
576 FILE *sf,*df;
577 MESSAGECACHE elt;
578 STRING *message;
579 long ret = LONGT;
580 /* default stream to prototype */
581 if (!stream) stream = &bezerkproto;
582 /* make sure valid mailbox */
583 if (!bezerk_isvalid (mailbox,tmp) && errno) {
584 if (errno == ENOENT) {
585 if (((mailbox[0] == 'I') || (mailbox[0] == 'i')) &&
586 ((mailbox[1] == 'N') || (mailbox[1] == 'n')) &&
587 ((mailbox[2] == 'B') || (mailbox[2] == 'b')) &&
588 ((mailbox[3] == 'O') || (mailbox[3] == 'o')) &&
589 ((mailbox[4] == 'X') || (mailbox[4] == 'x')) && !mailbox[5])
590 bezerk_create (NIL,"INBOX");
591 else {
592 mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
593 return NIL;
594 }
595 }
596 else if (mailboxfile (tmp,mailbox)) {
597 sprintf (tmp,"Not a Bezerk-format mailbox: %.80ss",mailbox);
598 mm_log (tmp,ERROR);
599 }
600 else bezerk_badname (tmp,mailbox);
601 return NIL;
602 }
603 tzset (); /* initialize timezone stuff */
604 /* get first message */
605 if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
606 if (!(sf = tmpfile ())) { /* must have scratch file */
607 sprintf (tmp,"Unable to create scratch file: %.80s",strerror (errno));
608 mm_log (tmp,ERROR);
609 }
611 do { /* parse date */
612 if (!date) rfc822_date (date = tmp);
613 if (!mail_parse_date (&elt,date)) {
614 sprintf (tmp,"Bad date in append: %.80s",date);
615 mm_log (tmp,ERROR);
616 }
617 else { /* user wants to suppress time zones? */
618 if (mail_parameters (NIL,GET_NOTIMEZONES,NIL)) {
619 time_t when = mail_longdate (&elt);
620 date = ctime (&when); /* use traditional date */
621 }
622 /* use POSIX-style date */
623 else date = mail_cdate (tmp,&elt);
624 if (!SIZE (message)) mm_log ("Append of zero-length message",ERROR);
625 else if (!bezerk_append_msg (stream,sf,flags,date,message)) {
626 sprintf (tmp,"Error writing scratch file: %.80s",strerror (errno));
627 mm_log (tmp,ERROR);
628 }
629 /* get next message */
630 else if ((*af) (stream,data,&flags,&date,&message)) continue;
631 }
632 fclose (sf); /* punt scratch file */
633 return NIL; /* give up */
634 } while (message); /* until no more messages */
635 if (fflush (sf) || fstat (fileno (sf),&sbuf)) {
636 sprintf (tmp,"Error finishing scratch file: %.80s",strerror (errno));
637 mm_log (tmp,ERROR);
638 fclose (sf); /* punt scratch file */
639 return NIL; /* give up */
640 }
641 i = sbuf.st_size; /* size of scratch file */
643 mm_critical (stream); /* go critical */
644 /* open the destination */
645 if (!mailboxfile (tmp,mailbox) ||
646 ((fd = open (tmp,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
647 S_IREAD|S_IWRITE)) < 0) ||
648 !(df = fdopen (fd,"ab"))) {
649 mm_nocritical (stream); /* done with critical */
650 sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
651 mm_log (tmp,ERROR);
652 return NIL;
653 }
654 fstat (fd,&sbuf); /* get current file size */
655 while (i) /* until written all bytes */
656 if ((j = fread (buf,1,min ((long) BUFLEN,i),sf)) &&
657 (fwrite (buf,1,j,df) == j)) i -= j;
658 fclose (sf); /* done with scratch file */
659 /* make sure append wins */
660 if (i || (fflush (df) == EOF)) {
661 chsize (fd,sbuf.st_size); /* revert file */
662 close (fd); /* make sure fclose() doesn't corrupt us */
663 sprintf (buf,"Message append failed: %s",strerror (errno));
664 mm_log (buf,ERROR);
665 ret = NIL; /* return error */
666 }
667 fclose (df);
668 mm_nocritical (stream); /* release critical */
669 if (ret && mail_parameters (NIL,GET_APPENDUID,NIL))
670 mm_log ("Can not return meaningful APPENDUID with this mailbox format",
671 WARN);
672 return ret;
673 }
675 /* Write single message to append scratch file
676 * Accepts: MAIL stream
677 * scratch file
678 * flags
679 * message stringstruct
680 * Returns: NIL if write error, else T
681 */
683 int bezerk_append_msg (MAILSTREAM *stream,FILE *sf,char *flags,char *date,
684 STRING *msg)
685 {
686 int c;
687 unsigned long i,uf;
688 char tmp[MAILTMPLEN];
689 long f = mail_parse_flags (stream,flags,&uf);
690 /* build initial header */
691 if ((fprintf (sf,"From %s@%s %sStatus: ",
692 myusername (),mylocalhost (),date) < 0) ||
693 (f&fSEEN && (putc ('R',sf) == EOF)) ||
694 (fputs ("\nX-Status: ",sf) == EOF) ||
695 (f&fDELETED && (putc ('D',sf) == EOF)) ||
696 (f&fFLAGGED && (putc ('F',sf) == EOF)) ||
697 (f&fANSWERED && (putc ('A',sf) == EOF)) ||
698 (f&fDRAFT && (putc ('T',sf) == EOF)) ||
699 (fputs ("\nX-Keywords:",sf) == EOF)) return NIL;
700 while (uf) /* write user flags */
701 if (fprintf (sf," %s",stream->user_flags[find_rightmost_bit (&uf)]) < 0)
702 return NIL;
703 /* tie off flags */
704 if (putc ('\n',sf) == EOF) return NIL;
705 while (SIZE (msg)) { /* copy text to scratch file */
706 /* possible delimiter if line starts with F */
707 if ((c = 0xff & SNX (msg)) == 'F') {
708 /* copy line to buffer */
709 for (i = 1,tmp[0] = c; SIZE (msg) && (c != '\n') && (i < MAILTMPLEN);)
710 if (((c = 0xff & SNX (msg)) != '\r') || !(SIZE (msg)) ||
711 (CHR (msg) != '\n')) tmp[i++] = c;
712 if ((i > 4) && (tmp[1] == 'r') && (tmp[2] == 'o') && (tmp[3] == 'm') &&
713 (tmp[4] == ' ')) { /* possible "From " line? */
714 /* yes, see if need to write a widget */
715 if (((c != '\n') || bezerk_valid_line (tmp,NIL,NIL)) &&
716 (putc ('>',sf) == EOF)) return NIL;
717 }
718 /* write buffered text */
719 if (fwrite (tmp,1,i,sf) != i) return NIL;
720 if (c == '\n') continue; /* all done if got a complete line */
721 }
722 /* copy line, toss out CR from CRLF */
723 do if (((c == '\r') && SIZE (msg) && ((c = 0xff & SNX (msg)) != '\n') &&
724 (putc ('\r',sf) == EOF)) || (putc (c,sf) == EOF)) return NIL;
725 while ((c != '\n') && SIZE (msg) && ((c = 0xff & SNX (msg)) ? c : T));
726 }
727 /* write trailing newline and return */
728 return (putc ('\n',sf) == EOF) ? NIL : T;
729 }
732 /* Return bad file name error message
733 * Accepts: temporary buffer
734 * file name
735 * Returns: long NIL always
736 */
738 long bezerk_badname (char *tmp,char *s)
739 {
740 sprintf (tmp,"Invalid mailbox name: %s",s);
741 mm_log (tmp,ERROR);
742 return (long) NIL;
743 }
745 /* Parse mailbox
746 * Accepts: MAIL stream
747 * Returns: T if parse OK
748 * NIL if failure, stream aborted
749 */
751 long bezerk_parse (MAILSTREAM *stream)
752 {
753 struct stat sbuf;
754 MESSAGECACHE *elt;
755 char *s,*t,tmp[MAILTMPLEN + 1],*db,datemsg[100];
756 long i;
757 int j,ti,zn;
758 long curpos = LOCAL->filesize;
759 long nmsgs = stream->nmsgs;
760 long recent = stream->recent;
761 short silent = stream->silent;
762 fstat (LOCAL->fd,&sbuf); /* get status */
763 if (sbuf.st_size < curpos) { /* sanity check */
764 sprintf (tmp,"Mailbox shrank from %ld to %ld!",curpos,sbuf.st_size);
765 mm_log (tmp,ERROR);
766 bezerk_close (stream,NIL);
767 return NIL;
768 }
769 stream->silent = T; /* don't pass up mm_exists() events yet */
770 db = datemsg + strlen (strcpy (datemsg,"Unparsable date: "));
771 /* while there is data to read */
772 while (i = sbuf.st_size - curpos){
773 /* get to that position in the file */
774 lseek (LOCAL->fd,curpos,SEEK_SET);
775 /* read first buffer's worth */
776 read (LOCAL->fd,tmp,j = (int) min (i,(long) MAILTMPLEN));
777 tmp[j] = '\0'; /* tie off buffer */
778 if (!(ti = bezerk_valid_line (tmp,&t,&zn))) {
779 mm_log ("Mailbox format invalidated (consult an expert), aborted",ERROR);
780 bezerk_close (stream,NIL);
781 return NIL;
782 }
784 /* swell the cache */
785 mail_exists (stream,++nmsgs);
786 /* instantiate an elt for this message */
787 (elt = mail_elt (stream,nmsgs))->valid = T;
788 elt->private.uid = ++stream->uid_last;
789 /* note file offset of header */
790 elt->private.special.offset = curpos;
791 /* note offset of message */
792 elt->private.msg.full.offset =
793 (s = ((*t == '\015') ? (t + 2) : (t + 1))) - tmp;
794 /* generate plausable IMAPish date string */
795 db[2] = db[6] = db[20] = '-'; db[11] = ' '; db[14] = db[17] = ':';
796 /* dd */
797 db[0] = t[ti - 2]; db[1] = t[ti - 1];
798 /* mmm */
799 db[3] = t[ti - 6]; db[4] = t[ti - 5]; db[5] = t[ti - 4];
800 /* hh */
801 db[12] = t[ti + 1]; db[13] = t[ti + 2];
802 /* mm */
803 db[15] = t[ti + 4]; db[16] = t[ti + 5];
804 if (t[ti += 6] == ':') { /* ss if present */
805 db[18] = t[++ti]; db[19] = t[++ti];
806 ti++; /* move to space */
807 }
808 else db[18] = db[19] = '0'; /* assume 0 seconds */
809 /* yy -- advance over timezone if necessary */
810 if (++zn == ++ti) ti += (((t[zn] == '+') || (t[zn] == '-')) ? 6 : 4);
811 db[7] = t[ti]; db[8] = t[ti + 1]; db[9] = t[ti + 2]; db[10] = t[ti + 3];
812 t = zn ? (t + zn) : "LCL"; /* zzz */
813 db[21] = *t++; db[22] = *t++; db[23] = *t++;
814 if ((db[21] != '+') && (db[21] != '-')) db[24] = '\0';
815 else { /* numeric time zone */
816 db[20] = ' '; db[24] = *t++; db[25] = *t++; db[26] = '\0';
817 }
818 /* set internal date */
819 if (!mail_parse_date (elt,db)) mm_log (datemsg,WARN);
821 curpos += s - tmp; /* advance position after header */
822 t = strchr (s,'\012'); /* start of next line */
823 /* find start of next message */
824 while (!(bezerk_valid_line (s,NIL,NIL))) {
825 if (t) { /* have next line? */
826 t++; /* advance to new line */
827 curpos += t - s; /* update position and size */
828 elt->rfc822_size += ((t - s) + ((t[-2] == '\015') ? 0 : 1));
829 s = t; /* move to next line */
830 t = strchr (s,'\012');
831 }
832 else { /* try next buffer */
833 j = strlen (s); /* length of unread data in buffer */
834 if ((i = sbuf.st_size - curpos) && (i != j)) {
835 /* get to that position in the file */
836 lseek (LOCAL->fd,curpos,SEEK_SET);
837 /* read another buffer's worth */
838 read (LOCAL->fd,s = tmp,j = (int) min (i,(long) MAILTMPLEN));
839 tmp[j] = '\0'; /* tie off buffer */
840 if (!(t = strchr (s,'\012'))) fatal ("Line too long in mailbox");
841 }
842 else {
843 curpos += j; /* last bit of data */
844 elt->rfc822_size += j;
845 break;
846 }
847 }
848 }
849 }
850 /* update parsed file size */
851 LOCAL->filesize = sbuf.st_size;
852 stream->silent = silent; /* can pass up events now */
853 mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
854 mail_recent (stream,recent); /* and of change in recent messages */
855 return T; /* return the winnage */
856 }
858 /* Berkeley locate header for a message
859 * Accepts: MAIL stream
860 * message number
861 * pointer to returned header size
862 * Returns: position of header in file
863 */
865 unsigned long bezerk_hdrpos (MAILSTREAM *stream,unsigned long msgno,
866 unsigned long *size)
867 {
868 long siz;
869 size_t i = 0;
870 char c = '\0';
871 char *s;
872 char tmp[MAILTMPLEN];
873 MESSAGECACHE *elt = mail_elt (stream,msgno);
874 long pos = elt->private.special.offset + elt->private.msg.full.offset;
875 /* is size known? */
876 if (!(*size = elt->private.msg.header.text.size)) {
877 /* get to header position */
878 lseek (LOCAL->fd,pos,SEEK_SET);
879 /* search message for CRLF CRLF */
880 for (siz = 1; siz <= elt->rfc822_size; siz++) {
881 if (!i && /* buffer empty? */
882 (read (LOCAL->fd,s = tmp,
883 i = (size_t) min(elt->rfc822_size-siz,(long)MAILTMPLEN))<= 0))
884 return pos;
885 else i--;
886 /* two newline sequence? */
887 if ((c == '\012') && (*s == '\012')) {
888 /* yes, note for later */
889 elt->private.msg.header.text.size = (*size = siz);
890 return pos; /* return to caller */
891 }
892 else if ((c == '\012') && (*s == '\015')) {
893 /* yes, note for later */
894 elt->private.msg.header.text.size = (*size = siz + 1);
895 return pos; /* return to caller */
896 }
897 else c = *s++; /* next character */
898 }
899 }
900 return pos; /* have position */
901 }