?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
* Do not define _BSD_SOURCE but define _DEFAULT_SOURCE instead.
[alpine.git] / imap / src / osdep / unix / mix.c
blobc53cabc062db19ff6a7789b2616bac7c5bfe9dd1
1 /* ========================================================================
2 * Copyright 2008-2012 Mark Crispin
3 * ========================================================================
4 */
5
6 /*
7 * Program: MIX mail routines
8 *
9 * Author(s): Mark Crispin
10 *
11 * Date: 1 March 2006
12 * Last Edited: 15 February 2012
13 *
14 * Previous versions of this file were
15 *
16 * Copyright 1988-2008 University of Washington
17 *
18 * Licensed under the Apache License, Version 2.0 (the "License");
19 * you may not use this file except in compliance with the License.
20 * You may obtain a copy of the License at
21 *
22 * http://www.apache.org/licenses/LICENSE-2.0
23 */
24
25
26 #include <stdio.h>
27 #include <ctype.h>
28 #include <errno.h>
29 extern int errno; /* just in case */
30 #include "mail.h"
31 #include "osdep.h"
32 #include <pwd.h>
33 #include <sys/stat.h>
34 #include <sys/time.h>
35 #include "misc.h"
36 #include "dummy.h"
37 #include "fdstring.h"
38 \f
39 /* MIX definitions */
40
41 #define MEGABYTE (1024*1024)
42
43 #define MIXDATAROLL MEGABYTE /* size at which we roll to a new file */
44
45
46 /* MIX files */
47
48 #define MIXNAME ".mix" /* prefix for all MIX file names */
49 #define MIXMETA "meta" /* suffix for metadata */
50 #define MIXINDEX "index" /* suffix for index */
51 #define MIXSTATUS "status" /* suffix for status */
52 #define MIXSORTCACHE "sortcache"/* suffix for sortcache */
53 #define METAMAX (MEGABYTE-1) /* maximum metadata file size (sanity check) */
54
55
56 /* MIX file formats */
57
58 /* sequence format (all but msg files) */
59 #define SEQFMT "S%08lx\015\012"
60 /* metadata file format */
61 #define MTAFMT "V%08lx\015\012L%08lx\015\012N%08lx\015\012"
62 /* index file record format */
63 #define IXRFMT ":%08lx:%04d%02d%02d%02d%02d%02d%c%02d%02d:%08lx:%08lx:%08lx:%08lx:%08lx:\015\012"
64 /* status file record format */
65 #define STRFMT ":%08lx:%08lx:%04x:%08lx:\015\012"
66 /* message file header format */
67 #define MSRFMT "%s%08lx:%04d%02d%02d%02d%02d%02d%c%02d%02d:%08lx:\015\012"
68 #define MSGTOK ":msg:"
69 #define MSGTSZ (sizeof(MSGTOK)-1)
70 /* sortcache file record format */
71 #define SCRFMT ":%08lx:%08lx:%08lx:%08lx:%08lx:%c%08lx:%08lx:%08lx:\015\012"
72 \f
73 /* MIX I/O stream local data */
74
75 typedef struct mix_local {
76 unsigned long curmsg; /* current message file number */
77 unsigned long newmsg; /* current new message file number */
78 time_t lastsnarf; /* last snarf time */
79 int msgfd; /* file description of current msg file */
80 int mfd; /* file descriptor of open metadata */
81 unsigned long metaseq; /* metadata sequence */
82 char *index; /* mailbox index name */
83 unsigned long indexseq; /* index sequence */
84 char *status; /* mailbox status name */
85 unsigned long statusseq; /* status sequence */
86 char *sortcache; /* mailbox sortcache name */
87 unsigned long sortcacheseq; /* sortcache sequence */
88 unsigned char *buf; /* temporary buffer */
89 unsigned long buflen; /* current size of temporary buffer */
90 unsigned int expok : 1; /* non-zero if expunge reports OK */
91 unsigned int internal : 1; /* internally opened, do not validate */
92 } MIXLOCAL;
93
94
95 #define MIXBURP struct mix_burp
96
97 MIXBURP {
98 unsigned long fileno; /* message file number */
99 char *name; /* message file name */
100 SEARCHSET *tail; /* tail of ranges */
101 SEARCHSET set; /* set of retained ranges */
102 MIXBURP *next; /* next file to burp */
103 };
104
105
106 /* Convenient access to local data */
107
108 #define LOCAL ((MIXLOCAL *) stream->local)
109 \f
110 /* Function prototypes */
111
112 DRIVER *mix_valid (char *name);
113 long mix_isvalid (char *name,char *meta);
114 void *mix_parameters (long function,void *value);
115 long mix_dirfmttest (char *name);
116 void mix_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
117 long mix_scan_contents (char *name,char *contents,unsigned long csiz,
118 unsigned long fsiz);
119 void mix_list (MAILSTREAM *stream,char *ref,char *pat);
120 void mix_lsub (MAILSTREAM *stream,char *ref,char *pat);
121 long mix_subscribe (MAILSTREAM *stream,char *mailbox);
122 long mix_unsubscribe (MAILSTREAM *stream,char *mailbox);
123 long mix_create (MAILSTREAM *stream,char *mailbox);
124 long mix_delete (MAILSTREAM *stream,char *mailbox);
125 long mix_rename (MAILSTREAM *stream,char *old,char *newname);
126 int mix_rselect (struct direct *name);
127 MAILSTREAM *mix_open (MAILSTREAM *stream);
128 void mix_close (MAILSTREAM *stream,long options);
129 void mix_abort (MAILSTREAM *stream);
130 char *mix_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
131 long flags);
132 long mix_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
133 void mix_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
134 unsigned long *mix_sort (MAILSTREAM *stream,char *charset,SEARCHPGM *spg,
135 SORTPGM *pgm,long flags);
136 THREADNODE *mix_thread (MAILSTREAM *stream,char *type,char *charset,
137 SEARCHPGM *spg,long flags);
138 long mix_ping (MAILSTREAM *stream);
139 void mix_check (MAILSTREAM *stream);
140 long mix_expunge (MAILSTREAM *stream,char *sequence,long options);
141 int mix_select (struct direct *name);
142 int mix_msgfsort (const void *d1,const void *d2);
143 long mix_addset (SEARCHSET **set,unsigned long start,unsigned long size);
144 long mix_burp (MAILSTREAM *stream,MIXBURP *burp,unsigned long *reclaimed);
145 long mix_burp_check (SEARCHSET *set,size_t size,char *file);
146 long mix_copy (MAILSTREAM *stream,char *sequence,char *mailbox,
147 long options);
148 long mix_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
149 long mix_append_msg (MAILSTREAM *stream,FILE *f,char *flags,MESSAGECACHE *delt,
150 STRING *msg,SEARCHSET *set,unsigned long seq);
151
152 FILE *mix_parse (MAILSTREAM *stream,FILE **idxf,long iflags,long sflags);
153 char *mix_meta_slurp (MAILSTREAM *stream,unsigned long *seq);
154 long mix_meta_update (MAILSTREAM *stream);
155 long mix_index_update (MAILSTREAM *stream,FILE *idxf,long flag);
156 long mix_status_update (MAILSTREAM *stream,FILE *statf,long flag);
157 FILE *mix_data_open (MAILSTREAM *stream,int *fd,long *size,
158 unsigned long newsize);
159 FILE *mix_sortcache_open (MAILSTREAM *stream);
160 long mix_sortcache_update (MAILSTREAM *stream,FILE **sortcache);
161 char *mix_read_record (FILE *f,char *buf,unsigned long buflen,char *type);
162 unsigned long mix_read_sequence (FILE *f);
163 char *mix_dir (char *dst,char *name);
164 char *mix_file (char *dst,char *dir,char *name);
165 char *mix_file_data (char *dst,char *dir,unsigned long data);
166 unsigned long mix_modseq (unsigned long oldseq);
167 \f
168 /* MIX mail routines */
169
170
171 /* Driver dispatch used by MAIL */
172
173 DRIVER mixdriver = {
174 "mix", /* driver name */
175 /* driver flags */
176 DR_MAIL|DR_LOCAL|DR_NOFAST|DR_CRLF|DR_LOCKING|DR_DIRFMT|DR_MODSEQ,
177 (DRIVER *) NIL, /* next driver */
178 mix_valid, /* mailbox is valid for us */
179 mix_parameters, /* manipulate parameters */
180 mix_scan, /* scan mailboxes */
181 mix_list, /* find mailboxes */
182 mix_lsub, /* find subscribed mailboxes */
183 mix_subscribe, /* subscribe to mailbox */
184 mix_unsubscribe, /* unsubscribe from mailbox */
185 mix_create, /* create mailbox */
186 mix_delete, /* delete mailbox */
187 mix_rename, /* rename mailbox */
188 mail_status_default, /* status of mailbox */
189 mix_open, /* open mailbox */
190 mix_close, /* close mailbox */
191 NIL, /* fetch message "fast" attributes */
192 NIL, /* fetch message flags */
193 NIL, /* fetch overview */
194 NIL, /* fetch message envelopes */
195 mix_header, /* fetch message header only */
196 mix_text, /* fetch message body only */
197 NIL, /* fetch partial message test */
198 NIL, /* unique identifier */
199 NIL, /* message number */
200 mix_flag, /* modify flags */
201 NIL, /* per-message modify flags */
202 NIL, /* search for message based on criteria */
203 mix_sort, /* sort messages */
204 mix_thread, /* thread messages */
205 mix_ping, /* ping mailbox to see if still alive */
206 mix_check, /* check for new messages */
207 mix_expunge, /* expunge deleted messages */
208 mix_copy, /* copy messages to another mailbox */
209 mix_append, /* append string message to mailbox */
210 NIL /* garbage collect stream */
211 };
212
213 /* prototype stream */
214 MAILSTREAM mixproto = {&mixdriver};
215 \f
216 /* MIX mail validate mailbox
217 * Accepts: mailbox name
218 * Returns: our driver if name is valid, NIL otherwise
219 */
220
221 DRIVER *mix_valid (char *name)
222 {
223 char tmp[MAILTMPLEN];
224 return mix_isvalid (name,tmp) ? &mixdriver : NIL;
225 }
226
227
228 /* MIX mail test for valid mailbox
229 * Accepts: mailbox name
230 * buffer to return meta name
231 * Returns: T if valid, NIL otherwise, metadata name written in both cases
232 */
233
234 long mix_isvalid (char *name,char *meta)
235 {
236 char dir[MAILTMPLEN];
237 struct stat sbuf;
238 /* validate name as directory */
239 if (!(errno = ((strlen (name) > NETMAXMBX) ? ENAMETOOLONG : NIL)) &&
240 *mix_dir (dir,name) && mix_file (meta,dir,MIXMETA) &&
241 !stat (dir,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) {
242 /* name is directory; is it mix? */
243 if (!stat (meta,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFREG))
244 return LONGT;
245 else errno = NIL; /* directory but not mix */
246 }
247 return NIL;
248 }
249 \f
250 /* MIX manipulate driver parameters
251 * Accepts: function code
252 * function-dependent value
253 * Returns: function-dependent return value
254 */
255
256 void *mix_parameters (long function,void *value)
257 {
258 void *ret = NIL;
259 switch ((int) function) {
260 case GET_INBOXPATH:
261 if (value) ret = mailboxfile ((char *) value,"~/INBOX");
262 break;
263 case GET_DIRFMTTEST:
264 ret = (void *) mix_dirfmttest;
265 break;
266 case GET_SCANCONTENTS:
267 ret = (void *) mix_scan_contents;
268 break;
269 case SET_ONETIMEEXPUNGEATPING:
270 if (value) ((MIXLOCAL *) ((MAILSTREAM *) value)->local)->expok = T;
271 case GET_ONETIMEEXPUNGEATPING:
272 if (value) ret = (void *)
273 (((MIXLOCAL *) ((MAILSTREAM *) value)->local)->expok ? VOIDT : NIL);
274 break;
275 }
276 return ret;
277 }
278
279
280 /* MIX test for directory format internal node
281 * Accepts: candidate node name
282 * Returns: T if internal name, NIL otherwise
283 */
284
285 long mix_dirfmttest (char *name)
286 {
287 /* belongs to MIX if starts with .mix */
288 return strncmp (name,MIXNAME,sizeof (MIXNAME) - 1) ? NIL : LONGT;
289 }
290 \f
291 /* MIX mail scan mailboxes
292 * Accepts: mail stream
293 * reference
294 * pattern to search
295 * string to scan
296 */
297
298 void mix_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
299 {
300 if (stream) dummy_scan (NIL,ref,pat,contents);
301 }
302
303
304 /* MIX scan mailbox for contents
305 * Accepts: mailbox name
306 * desired contents
307 * contents size
308 * file size (ignored)
309 * Returns: NIL if contents not found, T if found
310 */
311
312 long mix_scan_contents (char *name,char *contents,unsigned long csiz,
313 unsigned long fsiz)
314 {
315 long i,nfiles;
316 void *a;
317 char *s;
318 long ret = NIL;
319 size_t namelen = strlen (name);
320 struct stat sbuf;
321 struct direct **names = NIL;
322 if ((nfiles = scandir (name,&names,mix_select,mix_msgfsort)) > 0)
323 for (i = 0; i < nfiles; ++i) {
324 if (!ret) {
325 sprintf (s = (char *) fs_get (namelen + strlen (names[i]->d_name) + 2),
326 "%s/%s",name,names[i]->d_name);
327 if (!stat (s,&sbuf) && (csiz <= sbuf.st_size))
328 ret = dummy_scan_contents (s,contents,csiz,sbuf.st_size);
329 fs_give ((void **) &s);
330 }
331 fs_give ((void **) &names[i]);
332 }
333 /* free directory list */
334 if ((a = (void *) names) != NULL) fs_give ((void **) &a);
335 return ret;
336 }
337 \f
338 /* MIX list mailboxes
339 * Accepts: mail stream
340 * reference
341 * pattern to search
342 */
343
344 void mix_list (MAILSTREAM *stream,char *ref,char *pat)
345 {
346 if (stream) dummy_list (NIL,ref,pat);
347 }
348
349
350 /* MIX list subscribed mailboxes
351 * Accepts: mail stream
352 * reference
353 * pattern to search
354 */
355
356 void mix_lsub (MAILSTREAM *stream,char *ref,char *pat)
357 {
358 if (stream) dummy_lsub (NIL,ref,pat);
359 }
360 \f
361 /* MIX mail subscribe to mailbox
362 * Accepts: mail stream
363 * mailbox to add to subscription list
364 * Returns: T on success, NIL on failure
365 */
366
367 long mix_subscribe (MAILSTREAM *stream,char *mailbox)
368 {
369 return sm_subscribe (mailbox);
370 }
371
372
373 /* MIX mail unsubscribe to mailbox
374 * Accepts: mail stream
375 * mailbox to delete from subscription list
376 * Returns: T on success, NIL on failure
377 */
378
379 long mix_unsubscribe (MAILSTREAM *stream,char *mailbox)
380 {
381 return sm_unsubscribe (mailbox);
382 }
383 \f
384 /* MIX mail create mailbox
385 * Accepts: mail stream
386 * mailbox name to create
387 * Returns: T on success, NIL on failure
388 */
389
390 long mix_create (MAILSTREAM *stream,char *mailbox)
391 {
392 DRIVER *test;
393 FILE *f;
394 int c,i;
395 char *t,tmp[MAILTMPLEN],file[MAILTMPLEN];
396 char *s = strrchr (mailbox,'/');
397 unsigned long now = time (NIL);
398 long ret = NIL;
399 /* always create \NoSelect if trailing / */
400 if (s && !s[1]) return dummy_create (stream,mailbox);
401 /* validate name */
402 if (mix_dirfmttest (s ? s + 1 : mailbox))
403 sprintf(tmp,"Can't create mailbox %.80s: invalid MIX-format name",mailbox);
404 /* must not already exist */
405 else if ((test = mail_valid (NIL,mailbox,NIL)) &&
406 strcmp (test->name,"dummy"))
407 sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox);
408 /* create directory and metadata */
409 else if (!dummy_create_path (stream,
410 mix_file (file,mix_dir (tmp,mailbox),MIXMETA),
411 get_dir_protection (mailbox)))
412 sprintf (tmp,"Can't create mailbox %.80s: %.80s",mailbox,strerror (errno));
413 else if (!(f = fopen (file,"w")))
414 sprintf (tmp,"Can't re-open metadata %.80s: %.80s",mailbox,
415 strerror (errno));
416 else { /* success, write initial metadata */
417 fprintf (f,SEQFMT,now);
418 fprintf (f,MTAFMT,now,(unsigned long) 0,now);
419 for (i = 0, c = 'K'; (i < NUSERFLAGS) &&
420 (t = (stream && stream->user_flags[i]) ? stream->user_flags[i] :
421 default_user_flag (i)) && *t; ++i) {
422 putc (c,f); /* write another keyword */
423 fputs (t,f);
424 c = ' '; /* delimiter is now space */
425 }
426 fclose (f);
427 set_mbx_protections (mailbox,file);
428 /* point to suffix */
429 s = file + strlen (file) - (sizeof (MIXMETA) - 1);
430 strcpy (s,MIXINDEX); /* create index */
431 if (!dummy_create_path (stream,file,get_dir_protection (mailbox)))
432 sprintf (tmp,"Can't create mix mailbox index: %.80s",strerror (errno));
433 else {
434 set_mbx_protections (mailbox,file);
435 strcpy (s,MIXSTATUS); /* create status */
436 if (!dummy_create_path (stream,file,get_dir_protection (mailbox)))
437 sprintf (tmp,"Can't create mix mailbox status: %.80s",
438 strerror (errno));
439 else {
440 set_mbx_protections (mailbox,file);
441 sprintf (s,"%08lx",now);/* message file */
442 if (!dummy_create_path (stream,file,get_dir_protection (mailbox)))
443 sprintf (tmp,"Can't create mix mailbox data: %.80s",
444 strerror (errno));
445 else {
446 set_mbx_protections (mailbox,file);
447 ret = LONGT; /* declare success at this point */
448 }
449 }
450 }
451 }
452 if (!ret) MM_LOG (tmp,ERROR); /* some error */
453 return ret;
454 }
455 \f
456 /* MIX mail delete mailbox
457 * mailbox name to delete
458 * Returns: T on success, NIL on failure
459 */
460
461 long mix_delete (MAILSTREAM *stream,char *mailbox)
462 {
463 DIR *dirp;
464 struct direct *d;
465 int fd = -1;
466 char *s,tmp[MAILTMPLEN];
467 if (!mix_isvalid (mailbox,tmp))
468 sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox);
469 else if (((fd = open (tmp,O_RDWR,NIL)) < 0) || flock (fd,LOCK_EX|LOCK_NB))
470 sprintf (tmp,"Can't lock mailbox for delete: %.80s",mailbox);
471 /* delete metadata */
472 else if (unlink (tmp)) sprintf (tmp,"Can't delete mailbox %.80s index: %80s",
473 mailbox,strerror (errno));
474 else {
475 close (fd); /* close descriptor on deleted metadata */
476 /* get directory name */
477 *(s = strrchr (tmp,'/')) = '\0';
478 if ((dirp = opendir (tmp)) != NULL) { /* open directory */
479 *s++ = '/'; /* restore delimiter */
480 /* massacre messages */
481 while ((d = readdir (dirp)) != NULL) if (mix_dirfmttest (d->d_name)) {
482 strcpy (s,d->d_name); /* make path */
483 unlink (tmp); /* sayonara */
484 }
485 closedir (dirp); /* flush directory */
486 *(s = strrchr (tmp,'/')) = '\0';
487 if (rmdir (tmp)) { /* try to remove the directory */
488 sprintf (tmp,"Can't delete name %.80s: %.80s",
489 mailbox,strerror (errno));
490 MM_LOG (tmp,WARN);
491 }
492 }
493 return T; /* always success */
494 }
495 if (fd >= 0) close (fd); /* close any descriptor on metadata */
496 MM_LOG (tmp,ERROR); /* something failed */
497 return NIL;
498 }
499 \f
500 /* MIX mail rename mailbox
501 * Accepts: MIX mail stream
502 * old mailbox name
503 * new mailbox name
504 * Returns: T on success, NIL on failure
505 */
506
507 long mix_rename (MAILSTREAM *stream,char *old,char *newname)
508 {
509 char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN];
510 struct stat sbuf;
511 int fd = -1;
512 if (!mix_isvalid (old,tmp))
513 sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old);
514 else if (((fd = open (tmp,O_RDWR,NIL)) < 0) || flock (fd,LOCK_EX|LOCK_NB))
515 sprintf (tmp,"Can't lock mailbox for rename: %.80s",old);
516 else if (mix_dirfmttest ((s = strrchr (newname,'/')) ? s + 1 : newname))
517 sprintf (tmp,"Can't rename to mailbox %.80s: invalid MIX-format name",
518 newname);
519 /* new mailbox name must not be valid */
520 else if (mix_isvalid (newname,tmp))
521 sprintf (tmp,"Can't rename to mailbox %.80s: destination already exists",
522 newname);
523 else {
524 mix_dir (tmp,old); /* build old directory name */
525 mix_dir (tmp1,newname); /* and new directory name */
526 /* easy if not INBOX */
527 if (compare_cstring (old,"INBOX")) {
528 /* found superior to destination name? */
529 if ((s = strrchr (tmp1,'/')) != NULL) {
530 c = *++s; /* remember first character of inferior */
531 *s = '\0'; /* tie off to get just superior */
532 /* name doesn't exist, create it */
533 if ((stat (tmp1,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
534 !dummy_create_path (stream,tmp1,get_dir_protection (newname)))
535 return NIL;
536 *s = c; /* restore full name */
537 }
538 if (!rename (tmp,tmp1)) {
539 close (fd); /* close descriptor on metadata */
540 return LONGT;
541 }
542 }
543 \f
544 /* RFC 3501 requires this */
545 else if (dummy_create_path (stream,strcat (tmp1,"/"),
546 get_dir_protection (newname))) {
547 void *a;
548 int i,n,lasterror;
549 char *src,*dst;
550 struct direct **names = NIL;
551 size_t srcl = strlen (tmp);
552 size_t dstl = strlen (tmp1);
553 /* rename each mix file to new directory */
554 for (i = lasterror = 0,n = scandir (tmp,&names,mix_rselect,alphasort);
555 i < n; ++i) {
556 size_t len = strlen (names[i]->d_name);
557 sprintf (src = (char *) fs_get (srcl + len + 2),"%s/%s",
558 tmp,names[i]->d_name);
559 sprintf (dst = (char *) fs_get (dstl + len + 1),"%s%s",
560 tmp1,names[i]->d_name);
561 if (rename (src,dst)) lasterror = errno;
562 fs_give ((void **) &src);
563 fs_give ((void **) &dst);
564 fs_give ((void **) &names[i]);
565 }
566 /* free directory list */
567 if ((a = (void *) names) != NULL) fs_give ((void **) &a);
568 if (lasterror) errno = lasterror;
569 else {
570 close (fd); /* close descriptor on metadata */
571 return mix_create (NIL,"INBOX");
572 }
573 }
574 sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %.80s",
575 old,newname,strerror (errno));
576 }
577 if (fd >= 0) close (fd); /* close any descriptor on metadata */
578 MM_LOG (tmp,ERROR); /* something failed */
579 return NIL;
580 }
581
582
583 /* MIX test for mix name
584 * Accepts: candidate directory name
585 * Returns: T if mix file name, NIL otherwise
586 */
587
588 int mix_rselect (struct direct *name)
589 {
590 return mix_dirfmttest (name->d_name);
591 }
592 \f
593 /* MIX mail open
594 * Accepts: stream to open
595 * Returns: stream on success, NIL on failure
596 */
597
598 MAILSTREAM *mix_open (MAILSTREAM *stream)
599 {
600 short silent;
601 /* return prototype for OP_PROTOTYPE call */
602 if (!stream) return user_flags (&mixproto);
603 if (stream->local) fatal ("mix recycle stream");
604 stream->local = memset (fs_get (sizeof (MIXLOCAL)),0,sizeof (MIXLOCAL));
605 /* note if an INBOX or not */
606 stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
607 /* make temporary buffer */
608 LOCAL->buf = (char *) fs_get (CHUNKSIZE);
609 LOCAL->buflen = CHUNKSIZE - 1;
610 /* set stream->mailbox to be directory name */
611 mix_dir (LOCAL->buf,stream->mailbox);
612 fs_give ((void **) &stream->mailbox);
613 stream->mailbox = cpystr (LOCAL->buf);
614 LOCAL->msgfd = -1; /* currently no file open */
615 if (!(((!stream->rdonly && /* open metadata file */
616 ((LOCAL->mfd = open (mix_file (LOCAL->buf,stream->mailbox,MIXMETA),
617 O_RDWR,NIL)) >= 0)) ||
618 ((stream->rdonly = T) &&
619 ((LOCAL->mfd = open (mix_file (LOCAL->buf,stream->mailbox,MIXMETA),
620 O_RDONLY,NIL)) >= 0))) &&
621 !flock (LOCAL->mfd,LOCK_SH))) {
622 MM_LOG ("Error opening mix metadata file",ERROR);
623 mix_abort (stream);
624 stream = NIL; /* open fails */
625 }
626 else { /* metadata open, complete open */
627 LOCAL->index = cpystr (mix_file (LOCAL->buf,stream->mailbox,MIXINDEX));
628 LOCAL->status = cpystr (mix_file (LOCAL->buf,stream->mailbox,MIXSTATUS));
629 LOCAL->sortcache = cpystr (mix_file (LOCAL->buf,stream->mailbox,
630 MIXSORTCACHE));
631 stream->sequence++; /* bump sequence number */
632 /* parse mailbox */
633 stream->nmsgs = stream->recent = 0;
634 if ((silent = stream->silent) != 0) LOCAL->internal = T;
635 stream->silent = T;
636 if (mix_ping (stream)) { /* do initial ping */
637 /* try burping in case we are exclusive */
638 if (!stream->rdonly) mix_expunge (stream,"",NIL);
639 if (!(stream->nmsgs || stream->silent))
640 MM_LOG ("Mailbox is empty",(long) NIL);
641 stream->silent = silent; /* now notify upper level */
642 mail_exists (stream,stream->nmsgs);
643 stream->perm_seen = stream->perm_deleted = stream->perm_flagged =
644 stream->perm_answered = stream->perm_draft = stream->rdonly ? NIL : T;
645 stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
646 stream->kwd_create = /* can we create new user flags? */
647 (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ? NIL : T;
648 }
649 else { /* got murdelyzed in ping */
650 mix_abort (stream);
651 stream = NIL;
652 }
653 }
654 return stream; /* return stream to caller */
655 }
656 \f
657 /* MIX mail close
658 * Accepts: MAIL stream
659 * close options
660 */
661
662 void mix_close (MAILSTREAM *stream,long options)
663 {
664 if (LOCAL) { /* only if a file is open */
665 int silent = stream->silent;
666 stream->silent = T; /* note this stream is dying */
667 /* burp-only or expunge */
668 mix_expunge (stream,(options & CL_EXPUNGE) ? NIL : "",NIL);
669 mix_abort (stream);
670 stream->silent = silent; /* reset silent state */
671 }
672 }
673
674
675 /* MIX mail abort stream
676 * Accepts: MAIL stream
677 */
678
679 void mix_abort (MAILSTREAM *stream)
680 {
681 if (LOCAL) { /* only if a file is open */
682 /* close current message file if open */
683 if (LOCAL->msgfd >= 0) close (LOCAL->msgfd);
684 /* close current metadata file if open */
685 if (LOCAL->mfd >= 0) close (LOCAL->mfd);
686 if (LOCAL->index) fs_give ((void **) &LOCAL->index);
687 if (LOCAL->status) fs_give ((void **) &LOCAL->status);
688 if (LOCAL->sortcache) fs_give ((void **) &LOCAL->sortcache);
689 /* free local scratch buffer */
690 if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
691 /* nuke the local data */
692 fs_give ((void **) &stream->local);
693 stream->dtb = NIL; /* log out the DTB */
694 }
695 }
696 \f
697 /* MIX mail fetch message header
698 * Accepts: MAIL stream
699 * message # to fetch
700 * pointer to returned header text length
701 * option flags
702 * Returns: message header in RFC822 format
703 */
704
705 char *mix_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
706 long flags)
707 {
708 unsigned long i,j,k;
709 int fd;
710 char *s,tmp[MAILTMPLEN];
711 MESSAGECACHE *elt;
712 if (length) *length = 0; /* default return */
713 if (flags & FT_UID) return "";/* UID call "impossible" */
714 elt = mail_elt (stream,msgno);/* get elt */
715 /* is message in current message file? */
716 if ((LOCAL->msgfd < 0) || (elt->private.spare.data != LOCAL->curmsg)) {
717 if (LOCAL->msgfd >= 0) close (LOCAL->msgfd);
718 if ((LOCAL->msgfd = open (mix_file_data (LOCAL->buf,stream->mailbox,
719 elt->private.spare.data),
720 O_RDONLY,NIL)) < 0) return "";
721 /* got file */
722 LOCAL->curmsg = elt->private.spare.data;
723 }
724 lseek (LOCAL->msgfd,elt->private.special.offset,L_SET);
725 /* size of special data and header */
726 j = elt->private.msg.header.offset + elt->private.msg.header.text.size;
727 if (j > LOCAL->buflen) { /* is buffer big enough? */
728 /* no, make one that is */
729 fs_give ((void **) &LOCAL->buf);
730 LOCAL->buf = (char *) fs_get ((LOCAL->buflen = j) + 1);
731 }
732 /* Maybe someday validate internaldate too */
733 /* slurp special data + header, validate */
734 if ((read (LOCAL->msgfd,LOCAL->buf,j) == j) &&
735 !strncmp (LOCAL->buf,MSGTOK,MSGTSZ) &&
736 (elt->private.uid == strtoul ((char *) LOCAL->buf + MSGTSZ,&s,16)) &&
737 (*s++ == ':') && (s = strchr (s,':')) &&
738 (k = strtoul (s+1,&s,16)) && (*s++ == ':') &&
739 (s < (char *) (LOCAL->buf + elt->private.msg.header.offset))) {
740 /* won, set offset and size of message */
741 i = elt->private.msg.header.offset;
742 *length = elt->private.msg.header.text.size;
743 if (k != elt->rfc822_size) {
744 sprintf (tmp,"Inconsistency in mix message size, uid=%lx (%lu != %lu)",
745 elt->private.uid,elt->rfc822_size,k);
746 MM_LOG (tmp,WARN);
747 }
748 }
749 else { /* document the problem */
750 LOCAL->buf[100] = '\0'; /* tie off buffer at no more than 100 octets */
751 /* or at newline, whichever is first */
752 if ((s = strpbrk (LOCAL->buf,"\015\012")) != NULL) *s = '\0';
753 sprintf (tmp,"Error reading mix message header, uid=%lx, s=%.0lx, h=%s",
754 elt->private.uid,elt->rfc822_size,LOCAL->buf);
755 MM_LOG (tmp,ERROR);
756 *length = i = j = 0; /* default to empty */
757 }
758 LOCAL->buf[j] = '\0'; /* tie off buffer at the end */
759 return (char *) LOCAL->buf + i;
760 }
761 \f
762 /* MIX mail fetch message text (body only)
763 * Accepts: MAIL stream
764 * message # to fetch
765 * pointer to returned stringstruct
766 * option flags
767 * Returns: T on success, NIL on failure
768 */
769
770 long mix_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
771 {
772 unsigned long i;
773 FDDATA d;
774 MESSAGECACHE *elt;
775 /* UID call "impossible" */
776 if (flags & FT_UID) return NIL;
777 elt = mail_elt (stream,msgno);
778 /* is message in current message file? */
779 if ((LOCAL->msgfd < 0) || (elt->private.spare.data != LOCAL->curmsg)) {
780 if (LOCAL->msgfd >= 0) close (LOCAL->msgfd);
781 if ((LOCAL->msgfd = open (mix_file_data (LOCAL->buf,stream->mailbox,
782 elt->private.spare.data),
783 O_RDONLY,NIL)) < 0) return NIL;
784 /* got file */
785 LOCAL->curmsg = elt->private.spare.data;
786 }
787 /* doing non-peek fetch? */
788 if (!(flags & FT_PEEK) && !elt->seen) {
789 FILE *idxf; /* yes, process metadata/index/status */
790 FILE *statf = mix_parse (stream,&idxf,NIL,LONGT);
791 elt->seen = T; /* mark as seen */
792 MM_FLAGS (stream,elt->msgno);
793 /* update status file if possible */
794 if (statf && !stream->rdonly) {
795 elt->private.mod = LOCAL->statusseq = mix_modseq (LOCAL->statusseq);
796 mix_status_update (stream,statf,NIL);
797 }
798 if (idxf) fclose (idxf); /* release index and status file */
799 if (statf) fclose (statf);
800 }
801 d.fd = LOCAL->msgfd; /* set up file descriptor */
802 /* offset of message text */
803 d.pos = elt->private.special.offset + elt->private.msg.header.offset +
804 elt->private.msg.header.text.size;
805 d.chunk = LOCAL->buf; /* initial buffer chunk */
806 d.chunksize = CHUNKSIZE; /* chunk size */
807 INIT (bs,fd_string,&d,elt->rfc822_size - elt->private.msg.header.text.size);
808 return T;
809 }
810 \f
811 /* MIX mail modify flags
812 * Accepts: MAIL stream
813 * sequence
814 * flag(s)
815 * option flags
816 */
817
818 void mix_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
819 {
820 MESSAGECACHE *elt;
821 unsigned long i,uf,ffkey;
822 long f;
823 short nf;
824 FILE *idxf;
825 FILE *statf = mix_parse (stream,&idxf,NIL,LONGT);
826 unsigned long seq = mix_modseq (LOCAL->statusseq);
827 /* find first free key */
828 for (ffkey = 0; (ffkey < NUSERFLAGS) && stream->user_flags[ffkey]; ++ffkey);
829 /* parse sequence and flags */
830 if (((flags & ST_UID) ? mail_uid_sequence (stream,sequence) :
831 mail_sequence (stream,sequence)) &&
832 ((f = mail_parse_flags (stream,flag,&uf)) || uf)) {
833 /* alter flags */
834 for (i = 1,nf = (flags & ST_SET) ? T : NIL; i <= stream->nmsgs; i++)
835 if ((elt = mail_elt (stream,i))->sequence) {
836 struct { /* old flags */
837 unsigned int seen : 1;
838 unsigned int deleted : 1;
839 unsigned int flagged : 1;
840 unsigned int answered : 1;
841 unsigned int draft : 1;
842 unsigned long user_flags;
843 } old;
844 old.seen = elt->seen; old.deleted = elt->deleted;
845 old.flagged = elt->flagged; old.answered = elt->answered;
846 old.draft = elt->draft; old.user_flags = elt->user_flags;
847 if (f&fSEEN) elt->seen = nf;
848 if (f&fDELETED) elt->deleted = nf;
849 if (f&fFLAGGED) elt->flagged = nf;
850 if (f&fANSWERED) elt->answered = nf;
851 if (f&fDRAFT) elt->draft = nf;
852 /* user flags */
853 if (flags & ST_SET) elt->user_flags |= uf;
854 else elt->user_flags &= ~uf;
855 if ((old.seen != elt->seen) || (old.deleted != elt->deleted) ||
856 (old.flagged != elt->flagged) ||
857 (old.answered != elt->answered) || (old.draft != elt->draft) ||
858 (old.user_flags != elt->user_flags)) {
859 if (!stream->rdonly) elt->private.mod = LOCAL->statusseq = seq;
860 MM_FLAGS (stream,elt->msgno);
861 }
862 }
863 /* update status file after change */
864 if (statf && (seq == LOCAL->statusseq))
865 mix_status_update (stream,statf,NIL);
866 /* update metadata if created a keyword */
867 if ((ffkey < NUSERFLAGS) && stream->user_flags[ffkey] &&
868 !mix_meta_update (stream))
869 MM_LOG ("Error updating mix metadata after keyword creation",ERROR);
870 }
871 if (statf) fclose (statf); /* release status file if still open */
872 if (idxf) fclose (idxf); /* release index file */
873 }
874 \f
875 /* MIX mail sort messages
876 * Accepts: mail stream
877 * character set
878 * search program
879 * sort program
880 * option flags
881 * Returns: vector of sorted message sequences or NIL if error
882 */
883
884 unsigned long *mix_sort (MAILSTREAM *stream,char *charset,SEARCHPGM *spg,
885 SORTPGM *pgm,long flags)
886 {
887 unsigned long *ret;
888 FILE *sortcache = mix_sortcache_open (stream);
889 ret = mail_sort_msgs (stream,charset,spg,pgm,flags);
890 mix_sortcache_update (stream,&sortcache);
891 return ret;
892 }
893
894
895 /* MIX mail thread messages
896 * Accepts: mail stream
897 * thread type
898 * character set
899 * search program
900 * option flags
901 * Returns: thread node tree or NIL if error
902 */
903
904 THREADNODE *mix_thread (MAILSTREAM *stream,char *type,char *charset,
905 SEARCHPGM *spg,long flags)
906 {
907 THREADNODE *ret;
908 FILE *sortcache = mix_sortcache_open (stream);
909 ret = mail_thread_msgs (stream,type,charset,spg,flags,mail_sort_msgs);
910 mix_sortcache_update (stream,&sortcache);
911 return ret;
912 }
913 \f
914 /* MIX mail ping mailbox
915 * Accepts: MAIL stream
916 * Returns: T if stream alive, else NIL
917 */
918
919 static int snarfing = 0; /* lock against recursive snarfing */
920
921 long mix_ping (MAILSTREAM *stream)
922 {
923 FILE *idxf,*statf;
924 struct stat sbuf;
925 STRING msg;
926 MESSAGECACHE *elt;
927 int mfd,ifd,sfd;
928 unsigned long i,msglen;
929 char *message,date[MAILTMPLEN],flags[MAILTMPLEN];
930 MAILSTREAM *sysibx = NIL;
931 long ret = NIL;
932 long snarfok = LONGT;
933 /* time to snarf? */
934 if (stream->inbox && !stream->rdonly && !snarfing &&
935 (time (0) >= (LOCAL->lastsnarf +
936 (time_t) mail_parameters (NIL,GET_SNARFINTERVAL,NIL)))) {
937 appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
938 copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
939 MM_CRITICAL (stream); /* go critical */
940 snarfing = T; /* don't recursively snarf */
941 /* disable APPENDUID/COPYUID callbacks */
942 mail_parameters (NIL,SET_APPENDUID,NIL);
943 mail_parameters (NIL,SET_COPYUID,NIL);
944 /* sizes match and anything in sysinbox? */
945 if (!stat (sysinbox (),&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFREG) &&
946 sbuf.st_size && (sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) &&
947 !sysibx->rdonly && sysibx->nmsgs) {
948 /* for each message in sysibx mailbox */
949 for (i = 1; snarfok && (i <= sysibx->nmsgs); ++i)
950 if (!(elt = mail_elt (sysibx,i))->deleted &&
951 (message = mail_fetch_message (sysibx,i,&msglen,FT_PEEK)) &&
952 msglen) {
953 mail_date (date,elt); /* make internal date string */
954 /* make flag string */
955 flags[0] = flags[1] = '\0';
956 if (elt->seen) strcat (flags," \\Seen");
957 if (elt->flagged) strcat (flags," \\Flagged");
958 if (elt->answered) strcat (flags," \\Answered");
959 if (elt->draft) strcat (flags," \\Draft");
960 flags[0] = '(';
961 strcat (flags,")");
962 INIT (&msg,mail_string,message,msglen);
963 if ((snarfok = mail_append_full (stream,"INBOX",flags,date,&msg)) != 0L) {
964 char sequence[15];
965 sprintf (sequence,"%lu",i);
966 mail_flag (sysibx,sequence,"\\Deleted",ST_SET);
967 }
968 }
969 \f
970 /* now expunge all those messages */
971 if (snarfok) mail_expunge (sysibx);
972 else {
973 sprintf (LOCAL->buf,"Can't copy new mail at message: %lu",i - 1);
974 MM_LOG (LOCAL->buf,WARN);
975 }
976 }
977 if (sysibx) mail_close (sysibx);
978 /* reenable APPENDUID/COPYUID */
979 mail_parameters (NIL,SET_APPENDUID,(void *) au);
980 mail_parameters (NIL,SET_COPYUID,(void *) cu);
981 snarfing = NIL; /* no longer snarfing */
982 MM_NOCRITICAL (stream); /* release critical */
983 LOCAL->lastsnarf = time (0);/* note time of last snarf */
984 }
985 /* expunging OK if global flag set */
986 if (mail_parameters (NIL,GET_EXPUNGEATPING,NIL)) LOCAL->expok = T;
987 /* process metadata/index/status */
988 if ((statf = mix_parse (stream,&idxf,LONGT,
989 (LOCAL->internal ? NIL : LONGT))) != NULL) {
990 fclose (statf); /* just close the status file */
991 ret = LONGT; /* declare success */
992 }
993 if (idxf) fclose (idxf); /* release index file */
994 LOCAL->expok = NIL; /* expunge no longer OK */
995 if (!ret) mix_abort (stream); /* murdelyze stream if ping fails */
996 return ret;
997 }
998
999
1000 /* MIX mail checkpoint mailbox (burp only)
1001 * Accepts: MAIL stream
1002 */
1003
1004 void mix_check (MAILSTREAM *stream)
1005 {
1006 if (stream->rdonly) /* won't do on readonly files! */
1007 MM_LOG ("Checkpoint ignored on readonly mailbox",NIL);
1008 /* do burp-only expunge action */
1009 if (mix_expunge (stream,"",NIL)) MM_LOG ("Check completed",(long) NIL);
1010 }
1011 \f
1012 /* MIX mail expunge mailbox
1013 * Accepts: MAIL stream
1014 * sequence to expunge if non-NIL, empty string for burp only
1015 * expunge options
1016 * Returns: T on success, NIL if failure
1017 */
1018
1019 long mix_expunge (MAILSTREAM *stream,char *sequence,long options)
1020 {
1021 FILE *idxf = NIL;
1022 FILE *statf = NIL;
1023 MESSAGECACHE *elt;
1024 int ifd,sfd;
1025 long ret;
1026 unsigned long i;
1027 unsigned long nexp = 0;
1028 unsigned long reclaimed = 0;
1029 int burponly = (sequence && !*sequence);
1030 LOCAL->expok = T; /* expunge during ping is OK */
1031 if (!(ret = burponly || !sequence ||
1032 ((options & EX_UID) ?
1033 mail_uid_sequence (stream,sequence) :
1034 mail_sequence (stream,sequence))) || stream->rdonly);
1035 /* read index and open status exclusive */
1036 else if ((statf = mix_parse (stream,&idxf,LONGT,
1037 LOCAL->internal ? NIL : LONGT)) != NULL) {
1038 /* expunge unless just burping */
1039 if (!burponly) for (i = 1; i <= stream->nmsgs;) {
1040 elt = mail_elt (stream,i);/* need to expunge this message? */
1041 if (elt->deleted && (sequence ? elt->sequence : T)) {
1042 ++nexp; /* yes, make it so */
1043 mail_expunged (stream,i);
1044 }
1045 else ++i; /* otherwise advance to next message */
1046 }
1047 \f
1048 /* burp if can get exclusive access */
1049 if (!flock (LOCAL->mfd,LOCK_EX|LOCK_NB)) {
1050 void *a;
1051 struct direct **names = NIL;
1052 long nfiles = scandir (stream->mailbox,&names,mix_select,mix_msgfsort);
1053 if (nfiles > 0) { /* if have message files */
1054 MIXBURP *burp,*cur;
1055 /* initialize burp list */
1056 for (i = 0, burp = cur = NIL; i < nfiles; ++i) {
1057 MIXBURP *nxt = (MIXBURP *) memset (fs_get (sizeof (MIXBURP)),0,
1058 sizeof (MIXBURP));
1059 /* another file found */
1060 if (cur) cur = cur->next = nxt;
1061 else cur = burp = nxt;
1062 cur->name = cpystr (names[i]->d_name);
1063 cur->fileno = strtoul (cur->name + sizeof (MIXNAME) - 1,NIL,16);
1064 cur->tail = &cur->set;
1065 fs_give ((void **) &names[i]);
1066 }
1067 /* now load ranges */
1068 for (i = 1, cur = burp; ret && (i <= stream->nmsgs); i++) {
1069 /* is this message in current set? */
1070 elt = mail_elt (stream,i);
1071 if (cur && (elt->private.spare.data != cur->fileno)) {
1072 /* restart if necessary */
1073 if (elt->private.spare.data < cur->fileno) cur = burp;
1074 /* hunt for appropriate mailbox */
1075 while (cur && (elt->private.spare.data > cur->fileno))
1076 cur = cur->next;
1077 /* ought to have found it now... */
1078 if (cur && (elt->private.spare.data != cur->fileno)) cur = NIL;
1079 }
1080 /* if found, add to set */
1081 if (cur) ret = mix_addset (&cur->tail,elt->private.special.offset,
1082 elt->private.msg.header.offset +
1083 elt->rfc822_size);
1084 else { /* uh-oh */
1085 sprintf (LOCAL->buf,"Can't locate mix message file %.08lx",
1086 elt->private.spare.data);
1087 MM_LOG (LOCAL->buf,ERROR);
1088 ret = NIL;
1089 }
1090 }
1091 if (ret) /* if no errors, burp all files */
1092 for (cur = burp; ret && cur; cur = cur->next) {
1093 /* if non-empty, burp it */
1094 if (cur->set.last) ret = mix_burp (stream,cur,&reclaimed);
1095 /* empty, delete it unless new msg file */
1096 else if (mix_file_data (LOCAL->buf,stream->mailbox,cur->fileno) &&
1097 ((cur->fileno == LOCAL->newmsg) ?
1098 truncate (LOCAL->buf,0) : unlink (LOCAL->buf))) {
1099 sprintf (LOCAL->buf,
1100 "Can't delete empty message file %.80s: %.80s",
1101 cur->name,strerror (errno));
1102 MM_LOG (LOCAL->buf,WARN);
1103 }
1104 }
1105 while (burp) { /* flush the burp list */
1106 cur = burp->next;
1107 if (burp->name) fs_give ((void **) &burp->name);
1108 fs_give ((void **) &burp);
1109 burp = cur;
1110 }
1111 }
1112 else MM_LOG ("No mix message files found during expunge",WARN);
1113 /* free directory list */
1114 if ((a = (void *) names) != NULL) fs_give ((void **) &a);
1115 }
1116 \f
1117 /* either way, re-acquire shared lock */
1118 if (flock (LOCAL->mfd,LOCK_SH|LOCK_NB))
1119 fatal ("Unable to re-acquire metadata shared lock!");
1120 /* Do this step even if ret is NIL (meaning some burp problem)! */
1121 if (nexp || reclaimed) { /* rewrite index and status if changed */
1122 LOCAL->indexseq = mix_modseq (LOCAL->indexseq);
1123 if ((ret = mix_index_update (stream,idxf,NIL)) != 0L){
1124 LOCAL->statusseq = mix_modseq (LOCAL->statusseq);
1125 /* set failure if update fails */
1126 ret = mix_status_update (stream,statf,NIL);
1127 }
1128 }
1129 }
1130 if (statf) fclose (statf); /* close status if still open */
1131 if (idxf) fclose (idxf); /* close index if still open */
1132 LOCAL->expok = NIL; /* cancel expok */
1133 if (ret) { /* only if success */
1134 char *s = NIL;
1135 if (nexp) sprintf (s = LOCAL->buf,"Expunged %lu messages",nexp);
1136 else if (reclaimed)
1137 sprintf (s=LOCAL->buf,"Reclaimed %lu bytes of expunged space",reclaimed);
1138 else if (!burponly)
1139 s = stream->rdonly ? "Expunge ignored on readonly mailbox" :
1140 "No messages deleted, so no update needed";
1141 if (s) MM_LOG (s,(long) NIL);
1142 }
1143 return ret;
1144 }
1145 \f
1146 /* MIX test for message file name
1147 * Accepts: candidate directory name
1148 * Returns: T if message file name, NIL otherwise
1149 *
1150 * ".mix" with no suffix was used by experimental versions
1151 */
1152
1153 int mix_select (struct direct *name)
1154 {
1155 char c,*s;
1156 /* make sure name has prefix */
1157 if (mix_dirfmttest (name->d_name)) {
1158 for (c = *(s = name->d_name + sizeof (MIXNAME) - 1); c && isxdigit (c);
1159 c = *s++);
1160 if (!c) return T; /* all-hex or no suffix */
1161 }
1162 return NIL; /* not suffix or non-hex */
1163 }
1164
1165
1166 /* MIX msg file name comparision
1167 * Accepts: first candidate directory entry
1168 * second candidate directory entry
1169 * Returns: -1 if d1 < d2, 0 if d1 == d2, 1 d1 > d2
1170 */
1171
1172 int mix_msgfsort (const void *d1,const void *d2)
1173 {
1174 char *n1 = (*(struct direct **) d1)->d_name + sizeof (MIXNAME) - 1;
1175 char *n2 = (*(struct direct **) d2)->d_name + sizeof (MIXNAME) - 1;
1176 return compare_ulong (*n1 ? strtoul (n1,NIL,16) : 0,
1177 *n2 ? strtoul (n2,NIL,16) : 0);
1178 }
1179
1180
1181 /* MIX add a range to a set
1182 * Accepts: pointer to set to add
1183 * start of set
1184 * size of set
1185 * Returns: T if success, set updated, NIL otherwise
1186 */
1187
1188 long mix_addset (SEARCHSET **set,unsigned long start,unsigned long size)
1189 {
1190 SEARCHSET *s = *set;
1191 if (start < s->last) { /* sanity check */
1192 char tmp[MAILTMPLEN];
1193 sprintf (tmp,"Backwards-running mix index %lu < %lu",start,s->last);
1194 MM_LOG (tmp,ERROR);
1195 return NIL;
1196 }
1197 /* range initially empty? */
1198 if (!s->last) s->first = start;
1199 else if (start > s->last) /* no, start new range if can't append */
1200 (*set = s = s->next = mail_newsearchset ())->first = start;
1201 s->last = start + size; /* end of current range */
1202 return LONGT;
1203 }
1204 \f
1205 /* MIX burp message file
1206 * Accepts: MAIL stream
1207 * current burp block for this message
1208 * Returns: T if successful, NIL if failed
1209 */
1210
1211 static char *staterr = "Error in stat of mix message file %.80s: %.80s";
1212 static char *truncerr = "Error truncating mix message file %.80s: %.80s";
1213
1214 long mix_burp (MAILSTREAM *stream,MIXBURP *burp,unsigned long *reclaimed)
1215 {
1216 MESSAGECACHE *elt;
1217 SEARCHSET *set;
1218 struct stat sbuf;
1219 off_t rpos,wpos;
1220 size_t size,wsize,wpending,written;
1221 int fd;
1222 FILE *f;
1223 void *s;
1224 unsigned long i;
1225 long ret = NIL;
1226 /* build file name */
1227 mix_file_data (LOCAL->buf,stream->mailbox,burp->fileno);
1228 /* need to burp at start or multiple ranges? */
1229 if (!burp->set.first && !burp->set.next) {
1230 /* easy case, single range at start of file */
1231 if (stat (LOCAL->buf,&sbuf)) {
1232 sprintf (LOCAL->buf,staterr,burp->name,strerror (errno));
1233 MM_LOG (LOCAL->buf,ERROR);
1234 }
1235 /* is this range sane? */
1236 else if (mix_burp_check (&burp->set,sbuf.st_size,LOCAL->buf)) {
1237 /* if matches range then no burp needed! */
1238 if (burp->set.last == sbuf.st_size) ret = LONGT;
1239 /* just need to remove cruft at end */
1240 else if ((ret = !truncate (LOCAL->buf,burp->set.last)) != 0L)
1241 *reclaimed += sbuf.st_size - burp->set.last;
1242 else {
1243 sprintf (LOCAL->buf,truncerr,burp->name,strerror (errno));
1244 MM_LOG (LOCAL->buf,ERROR);
1245 }
1246 }
1247 }
1248 /* have to do more work, get the file */
1249 else if (((fd = open (LOCAL->buf,O_RDWR,NIL)) < 0) ||
1250 !(f = fdopen (fd,"r+b"))) {
1251 sprintf (LOCAL->buf,"Error opening mix message file %.80s: %.80s",
1252 burp->name,strerror (errno));
1253 MM_LOG (LOCAL->buf,ERROR);
1254 if (fd >= 0) close (fd); /* in case fdopen() failure */
1255 }
1256 else if (fstat (fd,&sbuf)) { /* get file size */
1257 sprintf (LOCAL->buf,staterr,burp->name,strerror (errno));
1258 MM_LOG (LOCAL->buf,ERROR);
1259 fclose (f);
1260 }
1261 \f
1262 /* only if sane */
1263 else if (mix_burp_check (&burp->set,sbuf.st_size,LOCAL->buf)) {
1264 /* make sure each range starts with token */
1265 for (set = &burp->set; set; set = set->next)
1266 if (fseek (f,set->first,SEEK_SET) ||
1267 (fread (LOCAL->buf,1,MSGTSZ,f) != MSGTSZ) ||
1268 strncmp (LOCAL->buf,MSGTOK,MSGTSZ)) {
1269 sprintf (LOCAL->buf,"Bad message token in mix message file at %lu",
1270 set->first);
1271 MM_LOG (LOCAL->buf,ERROR);
1272 fclose (f);
1273 return NIL; /* burp fails for this file */
1274 }
1275 /* burp out each old message */
1276 for (set = &burp->set, rpos = wpos = 0; set; set = set->next) {
1277 /* move down this range */
1278 for (rpos = set->first, size = set->last - set->first;
1279 size; size -= wsize) {
1280 if (rpos != wpos) { /* data to skip at start? */
1281 /* no, slide this buffer down */
1282 wsize = min (size,LOCAL->buflen);
1283 /* failure is not an option here */
1284 while (fseek (f,rpos,SEEK_SET) ||
1285 (fread (LOCAL->buf,1,wsize,f) != wsize)) {
1286 MM_NOTIFY (stream,strerror (errno),WARN);
1287 MM_DISKERROR (stream,errno,T);
1288 }
1289 /* nor here */
1290 while (fseek (f,wpos,SEEK_SET)) {
1291 MM_NOTIFY (stream,strerror (errno),WARN);
1292 MM_DISKERROR (stream,errno,T);
1293 }
1294 /* and especially not here */
1295 for (s = LOCAL->buf, wpending = wsize; wpending; s += written, wpending -= written)
1296 if (!(written = fwrite (s,1,wpending,f))) {
1297 MM_NOTIFY (stream,strerror (errno),WARN);
1298 MM_DISKERROR (stream,errno,T);
1299 }
1300 }
1301 else wsize = size; /* nothing to skip, say we wrote it all */
1302 rpos += wsize; wpos += wsize;
1303 }
1304 }
1305 \f
1306 while (fflush (f)) { /* failure also not an option here... */
1307 MM_NOTIFY (stream,strerror (errno),WARN);
1308 MM_DISKERROR (stream,errno,T);
1309 }
1310 if (ftruncate (fd,wpos)) { /* flush cruft at end of file */
1311 sprintf (LOCAL->buf,truncerr,burp->name,strerror (errno));
1312 MM_LOG (LOCAL->buf,WARN);
1313 }
1314 else *reclaimed += rpos - wpos;
1315 ret = !fclose (f); /* close file */
1316 /* slide down message positions in index */
1317 for (i = 1,rpos = 0; i <= stream->nmsgs; ++i)
1318 if ((elt = mail_elt (stream,i))->private.spare.data == burp->fileno) {
1319 elt->private.special.offset = rpos;
1320 rpos += elt->private.msg.header.offset + elt->rfc822_size;
1321 }
1322 /* debugging */
1323 if (rpos != wpos) fatal ("burp size consistency check!");
1324 }
1325 return ret;
1326 }
1327
1328
1329 /* MIX burp sanity check to make sure not burping off end of file
1330 * Accepts: burp set
1331 * file size
1332 * file name
1333 * Returns: T if sane, NIL if insane
1334 */
1335
1336 long mix_burp_check (SEARCHSET *set,size_t size,char *file)
1337 {
1338 do if (set->last > size) { /* sanity check */
1339 char tmp[MAILTMPLEN];
1340 sprintf (tmp,"Unexpected short mix message file %.80s %lu < %lu",
1341 file,size,set->last);
1342 MM_LOG (tmp,ERROR);
1343 return NIL; /* don't burp this file at all */
1344 } while ((set = set->next) != NULL);
1345 return LONGT;
1346 }
1347 \f
1348 /* MIX mail copy message(s)
1349 * Accepts: MAIL stream
1350 * sequence
1351 * destination mailbox
1352 * copy options
1353 * Returns: T if copy successful, else NIL
1354 */
1355
1356 long mix_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
1357 {
1358 FDDATA d;
1359 STRING st;
1360 char tmp[2*MAILTMPLEN];
1361 long ret = mix_isvalid (mailbox,LOCAL->buf);
1362 mailproxycopy_t pc =
1363 (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
1364 MAILSTREAM *astream = NIL;
1365 FILE *idxf = NIL;
1366 FILE *msgf = NIL;
1367 FILE *statf = NIL;
1368 if (!ret) switch (errno) { /* make sure valid mailbox */
1369 case NIL: /* no error in stat() */
1370 if (pc) return (*pc) (stream,sequence,mailbox,options);
1371 sprintf (tmp,"Not a MIX-format mailbox: %.80s",mailbox);
1372 MM_LOG (tmp,ERROR);
1373 break;
1374 default: /* some stat() error */
1375 MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
1376 break;
1377 }
1378 /* get sequence to copy */
1379 else if (!(ret = ((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
1380 mail_sequence (stream,sequence))));
1381 /* acquire stream to append */
1382 else if ((ret = ((astream = mail_open (NIL,mailbox,OP_SILENT)) &&
1383 !astream->rdonly &&
1384 (((MIXLOCAL *) astream->local)->expok = T) &&
1385 (statf = mix_parse (astream,&idxf,LONGT,NIL))) ?
1386 LONGT : NIL) != 0L) {
1387 int fd;
1388 unsigned long i;
1389 MESSAGECACHE *elt;
1390 unsigned long newsize,hdrsize,size;
1391 MIXLOCAL *local = (MIXLOCAL *) astream->local;
1392 unsigned long seq = mix_modseq (local->metaseq);
1393 /* make sure new modseq fits */
1394 if (local->indexseq > seq) seq = local->indexseq + 1;
1395 if (local->statusseq > seq) seq = local->statusseq + 1;
1396 /* calculate size of per-message header */
1397 sprintf (local->buf,MSRFMT,MSGTOK,(unsigned long) 0,0,0,0,0,0,0,'+',0,0,
1398 (unsigned long) 0);
1399 hdrsize = strlen (local->buf);
1400 \f
1401 MM_CRITICAL (stream); /* go critical */
1402 astream->silent = T; /* no events here */
1403 /* calculate size that will be added */
1404 for (i = 1, newsize = 0; i <= stream->nmsgs; ++i)
1405 if ((elt = mail_elt (stream,i))->sequence)
1406 newsize += hdrsize + elt->rfc822_size;
1407 /* open data file */
1408 if ((msgf = mix_data_open (astream,&fd,&size,newsize)) != NULL) {
1409 char *t;
1410 unsigned long j,uid,uidv;
1411 copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
1412 SEARCHSET *source = cu ? mail_newsearchset () : NIL;
1413 SEARCHSET *dest = cu ? mail_newsearchset () : NIL;
1414 for (i = 1,uid = uidv = 0; ret && (i <= stream->nmsgs); ++i)
1415 if (((elt = mail_elt (stream,i))->sequence) && elt->rfc822_size) {
1416 /* is message in current message file? */
1417 if ((LOCAL->msgfd < 0) ||
1418 (elt->private.spare.data != LOCAL->curmsg)) {
1419 if (LOCAL->msgfd >= 0) close (LOCAL->msgfd);
1420 if ((LOCAL->msgfd = open (mix_file_data (LOCAL->buf,
1421 stream->mailbox,
1422 elt->private.spare.data),
1423 O_RDONLY,NIL)) >= 0)
1424 LOCAL->curmsg = elt->private.spare.data;
1425 }
1426 if (LOCAL->msgfd < 0) ret = NIL;
1427 else { /* got file */
1428 d.fd = LOCAL->msgfd;/* set up file descriptor */
1429 /* start of message */
1430 d.pos = elt->private.special.offset +
1431 elt->private.msg.header.offset;
1432 d.chunk = LOCAL->buf;
1433 d.chunksize = CHUNKSIZE;
1434 INIT (&st,fd_string,&d,elt->rfc822_size);
1435 /* init flag string */
1436 tmp[0] = tmp[1] = '\0';
1437 if ((j = elt->user_flags) != 0L) do
1438 if ((t = stream->user_flags[find_rightmost_bit (&j)]) && *t)
1439 strcat (strcat (tmp," "),t);
1440 while (j);
1441 if (elt->seen) strcat (tmp," \\Seen");
1442 if (elt->deleted) strcat (tmp," \\Deleted");
1443 if (elt->flagged) strcat (tmp," \\Flagged");
1444 if (elt->answered) strcat (tmp," \\Answered");
1445 if (elt->draft) strcat (tmp," \\Draft");
1446 tmp[0] = '('; /* wrap list */
1447 strcat (tmp,")");
1448 /* if append OK, add to source set */
1449 if ((ret = mix_append_msg (astream,msgf,tmp,elt,&st,dest,
1450 seq)) && source)
1451 mail_append_set (source,mail_uid (stream,i));
1452 }
1453 }
1454 \f
1455 /* finish write if success */
1456 if (ret && (ret = !fflush (msgf))) {
1457 fclose (msgf); /* all good, close the msg file now */
1458 /* write new metadata, index, and status */
1459 local->metaseq = local->indexseq = local->statusseq = seq;
1460 if ((ret = (mix_meta_update (astream) &&
1461 mix_index_update (astream,idxf,LONGT))) != 0L){
1462 /* success, delete if doing a move */
1463 if (options & CP_MOVE)
1464 for (i = 1; i <= stream->nmsgs; i++)
1465 if ((elt = mail_elt (stream,i))->sequence) {
1466 elt->deleted = T;
1467 if (!stream->rdonly) elt->private.mod = LOCAL->statusseq = seq;
1468 MM_FLAGS (stream,elt->msgno);
1469 }
1470 /* done with status file now */
1471 mix_status_update (astream,statf,LONGT);
1472 /* return sets if doing COPYUID */
1473 if (cu) (*cu) (stream,mailbox,astream->uid_validity,source,dest);
1474 source = dest = NIL; /* don't free these sets now */
1475 }
1476 }
1477 else { /* error */
1478 if (errno) { /* output error message if system call error */
1479 sprintf (tmp,"Message copy failed: %.80s",strerror (errno));
1480 MM_LOG (tmp,ERROR);
1481 }
1482 ftruncate (fd,size); /* revert file */
1483 close (fd); /* make sure that fclose doesn't corrupt us */
1484 fclose (msgf); /* free the stdio resources */
1485 }
1486 /* flush any sets remaining */
1487 mail_free_searchset (&source);
1488 mail_free_searchset (&dest);
1489 }
1490 else { /* message file open failed */
1491 sprintf (tmp,"Error opening copy message file: %.80s",
1492 strerror (errno));
1493 MM_LOG (tmp,ERROR);
1494 ret = NIL;
1495 }
1496 MM_NOCRITICAL (stream);
1497 }
1498 else MM_LOG ("Can't open copy mailbox",ERROR);
1499 if (statf) fclose (statf); /* close status if still open */
1500 if (idxf) fclose (idxf); /* close index if still open */
1501 /* finished with append stream */
1502 if (astream) mail_close (astream);
1503 return ret; /* return state */
1504 }
1505 \f
1506 /* MIX mail append message from stringstruct
1507 * Accepts: MAIL stream
1508 * destination mailbox
1509 * append callback
1510 * data for callback
1511 * Returns: T if append successful, else NIL
1512 */
1513
1514 long mix_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
1515 {
1516 STRING *message;
1517 char *flags,*date,tmp[MAILTMPLEN];
1518 /* N.B.: can't use LOCAL->buf for tmp */
1519 long ret = mix_isvalid (mailbox,tmp);
1520 /* default stream to prototype */
1521 if (!stream) stream = user_flags (&mixproto);
1522 if (!ret) switch (errno) { /* if not valid mailbox */
1523 case ENOENT: /* no such file? */
1524 if ((ret = compare_cstring (mailbox,"INBOX") ?
1525 NIL : mix_create (NIL,"INBOX")) != 0L)
1526 break;
1527 MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before append",NIL);
1528 break;
1529 default:
1530 sprintf (tmp,"Not a MIX-format mailbox: %.80s",mailbox);
1531 MM_LOG (tmp,ERROR);
1532 break;
1533 }
1534 \f
1535 /* get first message */
1536 if (ret && MM_APPEND (af) (stream,data,&flags,&date,&message)) {
1537 MAILSTREAM *astream;
1538 FILE *idxf = NIL;
1539 FILE *msgf = NIL;
1540 FILE *statf = NIL;
1541 if ((ret = ((astream = mail_open (NIL,mailbox,OP_SILENT)) &&
1542 !astream->rdonly &&
1543 (((MIXLOCAL *) astream->local)->expok = T) &&
1544 (statf = mix_parse (astream,&idxf,LONGT,NIL))) ?
1545 LONGT : NIL) != 0l) {
1546 int fd;
1547 unsigned long size,hdrsize;
1548 MESSAGECACHE elt;
1549 MIXLOCAL *local = (MIXLOCAL *) astream->local;
1550 unsigned long seq = mix_modseq (local->metaseq);
1551 /* make sure new modseq fits */
1552 if (local->indexseq > seq) seq = local->indexseq + 1;
1553 if (local->statusseq > seq) seq = local->statusseq + 1;
1554 /* calculate size of per-message header */
1555 sprintf (local->buf,MSRFMT,MSGTOK,(unsigned long) 0,0,0,0,0,0,0,'+',0,0,
1556 (unsigned long) 0);
1557 hdrsize = strlen (local->buf);
1558 MM_CRITICAL (astream); /* go critical */
1559 astream->silent = T; /* no events here */
1560 /* open data file */
1561 if ((msgf = mix_data_open (astream,&fd,&size,hdrsize + SIZE (message))) != NULL){
1562 appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
1563 SEARCHSET *dst = au ? mail_newsearchset () : NIL;
1564 while (ret && message) {/* while good to go and have messages */
1565 errno = NIL; /* in case one of these causes failure */
1566 /* guard against zero-length */
1567 if (!(ret = SIZE (message)))
1568 MM_LOG ("Append of zero-length message",ERROR);
1569 else if (date && !(ret = mail_parse_date (&elt,date))) {
1570 sprintf (tmp,"Bad date in append: %.80s",date);
1571 MM_LOG (tmp,ERROR);
1572 }
1573 else {
1574 if (!date) { /* if date not specified, use now */
1575 internal_date (tmp);
1576 mail_parse_date (&elt,tmp);
1577 }
1578 ret = mix_append_msg (astream,msgf,flags,&elt,message,dst,seq) &&
1579 MM_APPEND (af) (stream,data,&flags,&date,&message);
1580 }
1581 }
1582 \f
1583 /* finish write if success */
1584 if (ret && (ret = !fflush (msgf))) {
1585 fclose (msgf); /* all good, close the msg file now */
1586 /* write new metadata, index, and status */
1587 local->metaseq = local->indexseq = local->statusseq = seq;
1588 if ((ret = (mix_meta_update (astream) &&
1589 mix_index_update (astream,idxf,LONGT) &&
1590 mix_status_update (astream,statf,LONGT))) && au) {
1591 (*au) (mailbox,astream->uid_validity,dst);
1592 dst = NIL; /* don't free this set now */
1593 }
1594 }
1595 else { /* failure */
1596 if (errno) { /* output error message if system call error */
1597 sprintf (tmp,"Message append failed: %.80s",strerror (errno));
1598 MM_LOG (tmp,ERROR);
1599 }
1600 ftruncate (fd,size); /* revert all writes to file*/
1601 close (fd); /* make sure that fclose doesn't corrupt us */
1602 fclose (msgf); /* free the stdio resources */
1603 }
1604 /* flush any set remaining */
1605 mail_free_searchset (&dst);
1606 }
1607 else { /* message file open failed */
1608 sprintf (tmp,"Error opening append message file: %.80s",
1609 strerror (errno));
1610 MM_LOG (tmp,ERROR);
1611 ret = NIL;
1612 }
1613 MM_NOCRITICAL (astream); /* release critical */
1614 }
1615 else MM_LOG ("Can't open append mailbox",ERROR);
1616 if (statf) fclose (statf); /* close status if still open */
1617 if (idxf) fclose (idxf); /* close index if still open */
1618 if (astream) mail_close (astream);
1619 }
1620 return ret;
1621 }
1622 \f
1623 /* MIX mail append single message
1624 * Accepts: MAIL stream
1625 * flags for new message if non-NIL
1626 * elt with source date if non-NIL
1627 * stringstruct of message text
1628 * searchset to place UID
1629 * modseq of message
1630 * Returns: T if success, NIL if failure
1631 */
1632
1633 long mix_append_msg (MAILSTREAM *stream,FILE *f,char *flags,MESSAGECACHE *delt,
1634 STRING *msg,SEARCHSET *set,unsigned long seq)
1635 {
1636 MESSAGECACHE *elt;
1637 int c,cs;
1638 unsigned long i,j,k,uf,hoff;
1639 long sf;
1640 void *s;
1641 stream->kwd_create = NIL; /* don't copy unknown keywords */
1642 sf = mail_parse_flags (stream,flags,&uf);
1643 /* swell the cache */
1644 mail_exists (stream,++stream->nmsgs);
1645 /* assign new UID from metadata */
1646 (elt = mail_elt (stream,stream->nmsgs))->private.uid = ++stream->uid_last;
1647 elt->private.mod = seq; /* set requested modseq in status */
1648 elt->rfc822_size = SIZE (msg);/* copy message size and date to index */
1649 elt->year = delt->year; elt->month = delt->month; elt->day = delt->day;
1650 elt->hours = delt->hours; elt->minutes = delt->minutes;
1651 elt->seconds = delt->seconds; elt->zoccident = delt->zoccident;
1652 elt->zhours = delt->zhours; elt->zminutes = delt->zminutes;
1653 /*
1654 * Do NOT set elt->valid here! mix_status_update() uses it to determine
1655 * whether a message should be marked as old.
1656 */
1657 if (sf&fSEEN) elt->seen = T; /* copy flags to status */
1658 if (sf&fDELETED) elt->deleted = T;
1659 if (sf&fFLAGGED) elt->flagged = T;
1660 if (sf&fANSWERED) elt->answered = T;
1661 if (sf&fDRAFT) elt->draft = T;
1662 elt->user_flags |= uf;
1663 /* message is in new message file */
1664 elt->private.spare.data = LOCAL->newmsg;
1665 \f
1666 /* offset to message internal header */
1667 elt->private.special.offset = ftell (f);
1668 /* build header for message */
1669 fprintf (f,MSRFMT,MSGTOK,elt->private.uid,
1670 elt->year + BASEYEAR,elt->month,elt->day,
1671 elt->hours,elt->minutes,elt->seconds,
1672 elt->zoccident ? '-' : '+',elt->zhours,elt->zminutes,
1673 elt->rfc822_size);
1674 /* offset to header from internal header */
1675 elt->private.msg.header.offset = ftell (f) - elt->private.special.offset;
1676 for (cs = 0; SIZE (msg); ) { /* copy message */
1677 if (elt->private.msg.header.text.size) {
1678 if (msg->cursize) /* blat entire chunk if have it */
1679 for (s = msg->curpos,j = msg->cursize; j; s += k, j -= k)
1680 if (!(k = fwrite (s,1,j,f))) return NIL;
1681 SETPOS (msg,GETPOS (msg) + msg->cursize);
1682 }
1683 else { /* still searching for delimiter */
1684 c = 0xff & SNX (msg); /* get source character */
1685 if (putc (c,f) == EOF) return NIL;
1686 switch (cs) { /* decide what to do based on state */
1687 case 0: /* previous char ordinary */
1688 if (c == '\015') cs = 1;/* advance if CR */
1689 break;
1690 case 1: /* previous CR, advance if LF */
1691 cs = (c == '\012') ? 2 : 0;
1692 break;
1693 case 2: /* previous CRLF, advance if CR */
1694 cs = (c == '\015') ? 3 : 0;
1695 break;
1696 case 3: /* previous CRLFCR, done if LF */
1697 if (c == '\012') elt->private.msg.header.text.size =
1698 elt->rfc822_size - SIZE (msg);
1699 cs = 0; /* reset mechanism */
1700 break;
1701 }
1702 }
1703 }
1704 /* if no delimiter, header is entire msg */
1705 if (!elt->private.msg.header.text.size)
1706 elt->private.msg.header.text.size = elt->rfc822_size;
1707 /* add this message to set */
1708 mail_append_set (set,elt->private.uid);
1709 return LONGT; /* success */
1710 }
1711 \f
1712 /* MIX mail read metadata, index, and status
1713 * Accepts: MAIL stream
1714 * returned index file
1715 * index file flags (non-NIL if want to add/remove messages)
1716 * status file flags (non-NIL if want to update elt->valid and old)
1717 * Returns: open status file, or NIL if failure
1718 *
1719 * Note that this routine can return an open index file even if it fails!
1720 */
1721
1722 static char *shortmsg =
1723 "message %lu (UID=%.08lx) truncated by %lu byte(s) (%lu < %lu)";
1724
1725 FILE *mix_parse (MAILSTREAM *stream,FILE **idxf,long iflags,long sflags)
1726 {
1727 int fd;
1728 unsigned long i;
1729 char *s,*t;
1730 struct stat sbuf;
1731 FILE *statf = NIL;
1732 short metarepairneeded = 0;
1733 short indexrepairneeded = 0;
1734 short silent = stream->silent;
1735 *idxf = NIL; /* in case error */
1736 /* readonly means no updates */
1737 if (stream->rdonly) iflags = sflags = NIL;
1738 /* open index file */
1739 if ((fd = open (LOCAL->index,iflags ? O_RDWR : O_RDONLY,NIL)) < 0)
1740 MM_LOG ("Error opening mix index file",ERROR);
1741 /* acquire exclusive access and FILE */
1742 else if (!flock (fd,iflags ? LOCK_EX : LOCK_SH) &&
1743 !(*idxf = fdopen (fd,iflags ? "r+b" : "rb"))) {
1744 MM_LOG ("Error obtaining stream on mix index file",ERROR);
1745 flock (fd,LOCK_UN); /* relinquish lock */
1746 close (fd);
1747 }
1748 \f
1749 /* slurp metadata */
1750 else if ((s = mix_meta_slurp (stream,&i)) != NULL) {
1751 unsigned long j = 0; /* non-zero if UIDVALIDITY/UIDLAST changed */
1752 if (i != LOCAL->metaseq) { /* metadata changed? */
1753 char *t,*k;
1754 LOCAL->metaseq = i; /* note new metadata sequence */
1755 while (s && *s) { /* parse entire metadata file */
1756 /* locate end of line */
1757 if ((s = strstr (t = s,"\015\012")) != NULL) {
1758 *s = '\0'; /* tie off line */
1759 s += 2; /* skip past CRLF */
1760 switch (*t++) { /* parse line */
1761 case 'V': /* UIDVALIDITY */
1762 if (!isxdigit (*t) || !(i = strtoul (t,&t,16))) {
1763 MM_LOG ("Error in mix metadata file UIDVALIDITY record",ERROR);
1764 return NIL; /* give up */
1765 }
1766 if (i != stream->uid_validity) j = stream->uid_validity = i;
1767 break;
1768 case 'L': /* new UIDLAST */
1769 if (!isxdigit (*t)) {
1770 MM_LOG ("Error in mix metadata file UIDLAST record",ERROR);
1771 return NIL; /* give up */
1772 }
1773 if ((i = strtoul (t,&t,16)) != stream->uid_last)
1774 j = stream->uid_last = i;
1775 break;
1776 case 'N': /* new message file */
1777 if (!isxdigit (*t)) {
1778 MM_LOG ("Error in mix metadata file new msg record",ERROR);
1779 return NIL; /* give up */
1780 }
1781 if ((i = strtoul (t,&t,16)) != stream->uid_last)
1782 LOCAL->newmsg = i;
1783 break;
1784 case 'K': /* new keyword list */
1785 for (i = 0; t && *t && (i < NUSERFLAGS); ++i) {
1786 if ((t = strchr (k = t,' ')) != NULL) *t++ = '\0';
1787 /* make sure keyword non-empty */
1788 if (*k && (strlen (k) <= MAXUSERFLAG)) {
1789 /* in case value changes (shouldn't happen) */
1790 if (stream->user_flags[i] && strcmp (stream->user_flags[i],k)){
1791 char tmp[MAILTMPLEN];
1792 sprintf (tmp,"flag rename old=%.80s new=%.80s",
1793 stream->user_flags[i],k);
1794 MM_LOG (tmp,WARN);
1795 fs_give ((void **) &stream->user_flags[i]);
1796 }
1797 if (!stream->user_flags[i]) stream->user_flags[i] = cpystr (k);
1798 }
1799 else break; /* empty keyword */
1800 }
1801 if ((i < NUSERFLAGS) && stream->user_flags[i]) {
1802 MM_LOG ("Error in mix metadata file keyword record",ERROR);
1803 return NIL; /* give up */
1804 }
1805 else if (i == NUSERFLAGS) stream->kwd_create = NIL;
1806 break;
1807 }
1808 }
1809 if (t && *t) { /* junk in line */
1810 MM_LOG ("Error in mix metadata record",ERROR);
1811 return NIL; /* give up */
1812 }
1813 }
1814 }
1815 \f
1816 /* get sequence */
1817 if (!(i = mix_read_sequence (*idxf)) || (i < LOCAL->indexseq)) {
1818 MM_LOG ("Error in mix index file sequence record",ERROR);
1819 return NIL; /* give up */
1820 }
1821 /* sequence changed from last time? */
1822 else if (j || (i > LOCAL->indexseq)) {
1823 unsigned long prevuid = 0;
1824 unsigned long uid,nmsgs,curfile,curfilesize,curpos;
1825 char *t,*msg,tmp[MAILTMPLEN];
1826 /* start with no messages */
1827 curfile = curfilesize = curpos = nmsgs = 0;
1828 /* update sequence iff expunging OK */
1829 if (LOCAL->expok) LOCAL->indexseq = i;
1830 /* get first elt */
1831 while ((s = mix_read_record (*idxf,LOCAL->buf,LOCAL->buflen,"index")) &&
1832 *s)
1833 switch (*s) {
1834 case ':': /* message record */
1835 if (!(isxdigit (*++s) && (uid = strtoul (s,&t,16)))) msg = "UID";
1836 else if (!((*t++ == ':') && isdigit (*t) && isdigit (t[1]) &&
1837 isdigit (t[2]) && isdigit (t[3]) && isdigit (t[4]) &&
1838 isdigit (t[5]) && isdigit (t[6]) && isdigit (t[7]) &&
1839 isdigit (t[8]) && isdigit (t[9]) && isdigit (t[10]) &&
1840 isdigit (t[11]) && isdigit (t[12]) && isdigit (t[13]) &&
1841 ((t[14] == '+') || (t[14] == '-')) &&
1842 isdigit (t[15]) && isdigit (t[16]) && isdigit (t[17]) &&
1843 isdigit (t[18]))) msg = "internaldate";
1844 else if ((*(s = t+19) != ':') || !isxdigit (*++s)) msg = "size";
1845 else {
1846 unsigned int y = (((*t - '0') * 1000) + ((t[1] - '0') * 100) +
1847 ((t[2] - '0') * 10) + t[3] - '0') - BASEYEAR;
1848 unsigned int m = ((t[4] - '0') * 10) + t[5] - '0';
1849 unsigned int d = ((t[6] - '0') * 10) + t[7] - '0';
1850 unsigned int hh = ((t[8] - '0') * 10) + t[9] - '0';
1851 unsigned int mm = ((t[10] - '0') * 10) + t[11] - '0';
1852 unsigned int ss = ((t[12] - '0') * 10) + t[13] - '0';
1853 unsigned int z = (t[14] == '-') ? 1 : 0;
1854 unsigned int zh = ((t[15] - '0') * 10) + t[16] - '0';
1855 unsigned int zm = ((t[17] - '0') * 10) + t[18] - '0';
1856 unsigned long size = strtoul (s,&s,16);
1857 if ((*s++ == ':') && isxdigit (*s)) {
1858 unsigned long file = strtoul (s,&s,16);
1859 if ((*s++ == ':') && isxdigit (*s)) {
1860 unsigned long pos = strtoul (s,&s,16);
1861 if ((*s++ == ':') && isxdigit (*s)) {
1862 unsigned long hpos = strtoul (s,&s,16);
1863 if ((*s++ == ':') && isxdigit (*s)) {
1864 unsigned long hsiz = strtoul (s,&s,16);
1865 if (uid > stream->uid_last) {
1866 sprintf (tmp,"mix index invalid UID (%08lx < %08lx)",
1867 uid,stream->uid_last);
1868 if (stream->rdonly) {
1869 MM_LOG (tmp,ERROR);
1870 return NIL;
1871 }
1872 strcat (tmp,", repaired");
1873 MM_LOG (tmp,WARN);
1874 stream->uid_last = uid;
1875 metarepairneeded = T;
1876 }
1877 \f
1878 /* ignore expansion values */
1879 if (*s++ == ':') {
1880 MESSAGECACHE *elt;
1881 if(prevuid > uid) {
1882 sprintf (tmp,"mix index backwards UID: %lx",uid);
1883 MM_LOG (tmp,ERROR);
1884 return NIL;
1885 }
1886 prevuid = uid;
1887 ++nmsgs; /* this is another mesage */
1888 /* within current known range of messages? */
1889 while (nmsgs <= stream->nmsgs) {
1890 /* yes, get corresponding elt */
1891 elt = mail_elt (stream,nmsgs);
1892 /* existing message with matching data? */
1893 if (uid == elt->private.uid) {
1894 /* beware of Dracula's resurrection */
1895 if (elt->private.ghost) {
1896 sprintf (tmp,"mix index data unexpunged UID: %lx",
1897 uid);
1898 MM_LOG (tmp,ERROR);
1899 return NIL;
1900 }
1901 /* also of static data changing */
1902 if ((size != elt->rfc822_size) ||
1903 (file != elt->private.spare.data) ||
1904 (pos != elt->private.special.offset) ||
1905 (hpos != elt->private.msg.header.offset) ||
1906 (hsiz != elt->private.msg.header.text.size) ||
1907 (y != elt->year) || (m != elt->month) ||
1908 (d != elt->day) || (hh != elt->hours) ||
1909 (mm != elt->minutes) || (ss != elt->seconds) ||
1910 (z != elt->zoccident) || (zh != elt->zhours) ||
1911 (zm != elt->zminutes)) {
1912 sprintf (tmp,"mix index data mismatch: %lx",uid);
1913 MM_LOG (tmp,ERROR);
1914 return NIL;
1915 }
1916 break;
1917 }
1918 /* existing msg with lower UID is expunged */
1919 else if (uid > elt->private.uid) {
1920 if (LOCAL->expok) mail_expunged (stream,nmsgs);
1921 else {/* message expunged, but not yet for us */
1922 ++nmsgs;
1923 elt->private.ghost = T;
1924 }
1925 }
1926 else { /* unexpected message record */
1927 sprintf (tmp,"mix index UID mismatch (%lx < %lx)",
1928 uid,elt->private.uid);
1929 MM_LOG (tmp,ERROR);
1930 return NIL;
1931 }
1932 }
1933 \f
1934 /* time to create a new message? */
1935 if (nmsgs > stream->nmsgs) {
1936 /* defer announcing until later */
1937 stream->silent = T;
1938 mail_exists (stream,nmsgs);
1939 stream->silent = silent;
1940 (elt = mail_elt (stream,nmsgs))->recent = T;
1941 elt->private.uid = uid; elt->rfc822_size = size;
1942 elt->private.spare.data = file;
1943 elt->private.special.offset = pos;
1944 elt->private.msg.header.offset = hpos;
1945 elt->private.msg.header.text.size = hsiz;
1946 elt->year = y; elt->month = m; elt->day = d;
1947 elt->hours = hh; elt->minutes = mm;
1948 elt->seconds = ss; elt->zoccident = z;
1949 elt->zhours = zh; elt->zminutes = zm;
1950 /* message in same file? */
1951 if (curfile == file) {
1952 if (pos < curpos) {
1953 MESSAGECACHE *plt = mail_elt (stream,elt->msgno-1);
1954 /* uh-oh, calculate delta? */
1955 i = curpos - pos;
1956 sprintf (tmp,shortmsg,plt->msgno,plt->private.uid,
1957 i,pos,curpos);
1958 /* possible to fix? */
1959 if (!stream->rdonly && LOCAL->expok &&
1960 (i < plt->rfc822_size)) {
1961 plt->rfc822_size -= i;
1962 if (plt->rfc822_size <
1963 plt->private.msg.header.text.size)
1964 plt->private.msg.header.text.size =
1965 plt->rfc822_size;
1966 strcat (tmp,", repaired");
1967 indexrepairneeded = T;
1968 }
1969 MM_LOG (tmp,WARN);
1970 }
1971 }
1972 else { /* new file, restart */
1973 if (stat (mix_file_data (LOCAL->buf,stream->mailbox,
1974 curfile = file),&sbuf)) {
1975 sprintf (tmp,"Missing mix data file: %.500s",
1976 LOCAL->buf);
1977 MM_LOG (tmp,ERROR);
1978 return NIL;
1979 }
1980 curfile = file;
1981 curfilesize = sbuf.st_size;
1982 }
1983 \f
1984 /* position of message in file */
1985 curpos = pos + elt->private.msg.header.offset +
1986 elt->rfc822_size;
1987 /* short file? */
1988 if (curfilesize < curpos) {
1989 /* uh-oh, calculate delta? */
1990 i = curpos - curfilesize;
1991 sprintf (tmp,shortmsg,elt->msgno,elt->private.uid,
1992 i,curfilesize,curpos);
1993 /* possible to fix? */
1994 if (!stream->rdonly && LOCAL->expok &&
1995 (i < elt->rfc822_size)) {
1996 elt->rfc822_size -= i;
1997 if (elt->rfc822_size <
1998 elt->private.msg.header.text.size)
1999 elt->private.msg.header.text.size =
2000 elt->rfc822_size;
2001 strcat (tmp,", repaired");
2002 indexrepairneeded = T;
2003 }
2004 MM_LOG (tmp,WARN);
2005 }
2006 }
2007 break;
2008 }
2009 else msg = "expansion";
2010 }
2011 else msg = "header size";
2012 }
2013 else msg = "header position";
2014 }
2015 else msg = "message position";
2016 }
2017 else msg = "file#";
2018 }
2019 sprintf (tmp,"Error in %s in mix index file: %.500s",msg,s);
2020 MM_LOG (tmp,ERROR);
2021 return NIL;
2022 default:
2023 sprintf (tmp,"Unknown record in mix index file: %.500s",s);
2024 MM_LOG (tmp,ERROR);
2025 return NIL;
2026 }
2027 if (!s) return NIL; /* barfage from mix_read_record() */
2028 /* expunge trailing messages not in index */
2029 if (LOCAL->expok) while (nmsgs < stream->nmsgs)
2030 mail_expunged (stream,stream->nmsgs);
2031 }
2032 \f
2033 /* repair metadata and index if needed */
2034 if ((metarepairneeded ? mix_meta_update (stream) : T) &&
2035 (indexrepairneeded ? mix_index_update (stream,*idxf,NIL) : T)) {
2036 MESSAGECACHE *elt;
2037 int fd;
2038 unsigned long uid,uf,sf,mod;
2039 char *s;
2040 int updatep = NIL;
2041 /* open status file */
2042 if ((fd = open (LOCAL->status,
2043 stream->rdonly ? O_RDONLY : O_RDWR,NIL)) < 0)
2044 MM_LOG ("Error opening mix status file",ERROR);
2045 /* acquire exclusive access and FILE */
2046 else if (!flock (fd,stream->rdonly ? LOCK_SH : LOCK_EX) &&
2047 !(statf = fdopen (fd,stream->rdonly ? "rb" : "r+b"))) {
2048 MM_LOG ("Error obtaining stream on mix status file",ERROR);
2049 flock (fd,LOCK_UN); /* relinquish lock */
2050 close (fd);
2051 }
2052 /* get sequence */
2053 else if (!(i = mix_read_sequence (statf)) ||
2054 ((i < LOCAL->statusseq) && stream->nmsgs && (i != 1))) {
2055 sprintf (LOCAL->buf,
2056 "Error in mix status sequence record, i=%lx, seq=%lx",
2057 i,LOCAL->statusseq);
2058 MM_LOG (LOCAL->buf,ERROR);
2059 }
2060 /* sequence changed from last time? */
2061 else if (i != LOCAL->statusseq) {
2062 /* update sequence, get first elt */
2063 if (i > LOCAL->statusseq) LOCAL->statusseq = i;
2064 if (stream->nmsgs) {
2065 elt = mail_elt (stream,i = 1);
2066 \f
2067 /* read message records */
2068 while ((t = s = mix_read_record (statf,LOCAL->buf,LOCAL->buflen,
2069 "status")) && *s && (*s++ == ':') &&
2070 isxdigit (*s)) {
2071 uid = strtoul (s,&s,16);
2072 if ((*s++ == ':') && isxdigit (*s)) {
2073 uf = strtoul (s,&s,16);
2074 if ((*s++ == ':') && isxdigit (*s)) {
2075 sf = strtoul (s,&s,16);
2076 if ((*s++ == ':') && isxdigit (*s)) {
2077 mod = strtoul (s,&s,16);
2078 /* ignore expansion values */
2079 if (*s++ == ':') {
2080 /* need to move ahead to next elt? */
2081 while ((uid > elt->private.uid) && (i < stream->nmsgs))
2082 elt = mail_elt (stream,++i);
2083 /* update elt if altered */
2084 if ((uid == elt->private.uid) &&
2085 (!elt->valid || (mod != elt->private.mod))) {
2086 elt->user_flags = uf;
2087 elt->private.mod = mod;
2088 elt->seen = (sf & fSEEN) ? T : NIL;
2089 elt->deleted = (sf & fDELETED) ? T : NIL;
2090 elt->flagged = (sf & fFLAGGED) ? T : NIL;
2091 elt->answered = (sf & fANSWERED) ? T : NIL;
2092 elt->draft = (sf & fDRAFT) ? T : NIL;
2093 /* announce if altered existing message */
2094 if (elt->valid) MM_FLAGS (stream,elt->msgno);
2095 /* first time, is old message? */
2096 else if (sf & fOLD) {
2097 /* yes, clear recent and set valid */
2098 elt->recent = NIL;
2099 elt->valid = T;
2100 }
2101 /* recent, allowed to update its status? */
2102 else if (sflags) {
2103 /* yes, set valid and check in status */
2104 elt->valid = T;
2105 elt->private.mod = mix_modseq (elt->private.mod);
2106 updatep = T;
2107 }
2108 /* leave valid unset and recent if sflags not set */
2109 }
2110 continue; /* everything looks good */
2111 }
2112 }
2113 }
2114 }
2115 break; /* error somewhere */
2116 }
2117 \f
2118 if (t && *t) { /* non-null means bogus record */
2119 char msg[MAILTMPLEN];
2120 sprintf (msg,"Error in mix status file message record%s: %.80s",
2121 stream->rdonly ? "" : ", fixing",t);
2122 MM_LOG (msg,WARN);
2123 /* update it if not readonly */
2124 if (!stream->rdonly) updatep = T;
2125 }
2126 if (updatep) { /* need to update? */
2127 LOCAL->statusseq = mix_modseq (LOCAL->statusseq);
2128 mix_status_update (stream,statf,LONGT);
2129 }
2130 }
2131 }
2132 }
2133 }
2134 if (statf) { /* still happy? */
2135 unsigned long j;
2136 stream->silent = silent; /* now notify upper level */
2137 mail_exists (stream,stream->nmsgs);
2138 for (i = 1, j = 0; i <= stream->nmsgs; ++i)
2139 if (mail_elt (stream,i)->recent) ++j;
2140 mail_recent (stream,j);
2141 }
2142 return statf;
2143 }
2144 \f
2145 /* MIX metadata file routines */
2146
2147 /* MIX read metadata
2148 * Accepts: MAIL stream
2149 * return pointer for modseq
2150 * Returns: pointer to metadata after modseq or NIL if failure
2151 */
2152
2153 char *mix_meta_slurp (MAILSTREAM *stream,unsigned long *seq)
2154 {
2155 struct stat sbuf;
2156 char *s;
2157 char *ret = NIL;
2158 if (fstat (LOCAL->mfd,&sbuf))
2159 MM_LOG ("Error obtaining size of mix metatdata file",ERROR);
2160 if (sbuf.st_size > LOCAL->buflen) {
2161 /* should be just a few dozen bytes */
2162 if (sbuf.st_size > METAMAX) fatal ("absurd mix metadata file size");
2163 fs_give ((void **) &LOCAL->buf);
2164 LOCAL->buf = (char *) fs_get ((LOCAL->buflen = sbuf.st_size) + 1);
2165 }
2166 /* read current metadata file */
2167 LOCAL->buf[sbuf.st_size] = '\0';
2168 if (lseek (LOCAL->mfd,0,L_SET) ||
2169 (read (LOCAL->mfd,s = LOCAL->buf,sbuf.st_size) != sbuf.st_size))
2170 MM_LOG ("Error reading mix metadata file",ERROR);
2171 else if ((*s != 'S') || !isxdigit (s[1]) ||
2172 ((*seq = strtoul (s+1,&s,16)) < LOCAL->metaseq) ||
2173 (*s++ != '\015') || (*s++ != '\012'))
2174 MM_LOG ("Error in mix metadata file sequence record",ERROR);
2175 else ret = s;
2176 return ret;
2177 }
2178 \f
2179 /* MIX update metadata
2180 * Accepts: MAIL stream
2181 * Returns: T on success, NIL if error
2182 *
2183 * Index MUST be locked!!
2184 */
2185
2186 long mix_meta_update (MAILSTREAM *stream)
2187 {
2188 long ret;
2189 /* do nothing if stream readonly */
2190 if (stream->rdonly) ret = LONGT;
2191 else {
2192 unsigned char c,*s,*ss,*t;
2193 unsigned long i;
2194 /* The worst-case metadata is limited to:
2195 * 4 * (1 + 8 + 2) + (NUSERFLAGS * (MAXUSERFLAG + 1))
2196 * which comes out to 1994 octets. This is much smaller than the normal
2197 * CHUNKSIZE definition of 64K, and CHUNKSIZE is the smallest size of
2198 * LOCAL->buf.
2199 *
2200 * If more stuff gets added to the metadata, or if you change the value
2201 * of NUSERFLAGS, MAXUSERFLAG or CHUNKSIZE, be sure to recalculate the
2202 * above assertation.
2203 */
2204 sprintf (LOCAL->buf,SEQFMT,LOCAL->metaseq = mix_modseq (LOCAL->metaseq));
2205 sprintf (LOCAL->buf + strlen (LOCAL->buf),MTAFMT,
2206 stream->uid_validity,stream->uid_last,LOCAL->newmsg);
2207 for (i = 0, c = 'K', s = ss = LOCAL->buf + strlen (LOCAL->buf);
2208 (i < NUSERFLAGS) && (t = stream->user_flags[i]); ++i) {
2209 if (!*t) fatal ("impossible empty keyword");
2210 *s++ = c; /* write delimiter */
2211 while (*t) *s++ = *t++; /* write keyword */
2212 c = ' '; /* delimiter is now space */
2213 }
2214 if (s != ss) { /* tie off keywords line */
2215 *s++ = '\015'; *s++ = '\012';
2216 }
2217 /* calculate length of metadata */
2218 if ((i = s - LOCAL->buf) > LOCAL->buflen)
2219 fatal ("impossible buffer overflow");
2220 lseek (LOCAL->mfd,0,L_SET); /* rewind file */
2221 /* write new metadata */
2222 ret = (write (LOCAL->mfd,LOCAL->buf,i) == i) ? LONGT : NIL;
2223 ftruncate (LOCAL->mfd,i); /* and tie off at that point */
2224 }
2225 return ret;
2226 }
2227 \f
2228 /* MIX index file routines */
2229
2230
2231 /* MIX update index
2232 * Accepts: MAIL stream
2233 * open FILE
2234 * expansion check flag
2235 * Returns: T on success, NIL if error
2236 */
2237
2238 long mix_index_update (MAILSTREAM *stream,FILE *idxf,long flag)
2239 {
2240 unsigned long i;
2241 long ret = LONGT;
2242 if (!stream->rdonly) { /* do nothing if stream readonly */
2243 if (flag) { /* need to do expansion check? */
2244 char tmp[MAILTMPLEN];
2245 size_t size;
2246 struct stat sbuf;
2247 /* calculate file size we need */
2248 for (i = 1, size = 0; i <= stream->nmsgs; ++i)
2249 if (!mail_elt (stream,i)->private.ghost) ++size;
2250 if (size) { /* Winston Smith's first dairy entry */
2251 sprintf (tmp,IXRFMT,(unsigned long) 0,14,4,4,13,0,0,'+',0,0,
2252 (unsigned long) 0,(unsigned long) 0,(unsigned long) 0,
2253 (unsigned long) 0,(unsigned long) 0);
2254 size *= strlen (tmp);
2255 }
2256 /* calculate file size we need */
2257 sprintf (tmp,SEQFMT,LOCAL->indexseq);
2258 size += strlen (tmp);
2259 /* get current file size */
2260 if (fstat (fileno (idxf),&sbuf)) {
2261 MM_LOG ("Error getting size of mix index file",ERROR);
2262 ret = NIL;
2263 }
2264 /* need to write additional space? */
2265 else if (sbuf.st_size < size) {
2266 void *buf = fs_get (size -= sbuf.st_size);
2267 memset (buf,0,size);
2268 if (fseek (idxf,0,SEEK_END) || (fwrite (buf,1,size,idxf) != size) ||
2269 fflush (idxf)) {
2270 fseek (idxf,sbuf.st_size,SEEK_SET);
2271 ftruncate (fileno (idxf),sbuf.st_size);
2272 MM_LOG ("Error extending mix index file",ERROR);
2273 ret = NIL;
2274 }
2275 fs_give ((void **) &buf);
2276 }
2277 }
2278 \f
2279 if (ret) { /* if still good to go */
2280 rewind (idxf); /* let's start at the very beginning */
2281 /* write modseq first */
2282 fprintf (idxf,SEQFMT,LOCAL->indexseq);
2283 /* then write all messages */
2284 for (i = 1; ret && (i <= stream->nmsgs); i++) {
2285 MESSAGECACHE *elt = mail_elt (stream,i);
2286 if (!elt->private.ghost)/* only write living messages */
2287 fprintf (idxf,IXRFMT,elt->private.uid,
2288 elt->year + BASEYEAR,elt->month,elt->day,
2289 elt->hours,elt->minutes,elt->seconds,
2290 elt->zoccident ? '-' : '+',elt->zhours,elt->zminutes,
2291 elt->rfc822_size,elt->private.spare.data,
2292 elt->private.special.offset,
2293 elt->private.msg.header.offset,
2294 elt->private.msg.header.text.size);
2295 if (ferror (idxf)) {
2296 MM_LOG ("Error updating mix index file",ERROR);
2297 ret = NIL;
2298 }
2299 }
2300 if (fflush (idxf)) {
2301 MM_LOG ("Error flushing mix index file",ERROR);
2302 ret = NIL;
2303 }
2304 if (ret) ftruncate (fileno (idxf),ftell (idxf));
2305 }
2306 }
2307 return ret;
2308 }
2309 \f
2310 /* MIX status file routines */
2311
2312
2313 /* MIX update status
2314 * Accepts: MAIL stream
2315 * pointer to open FILE
2316 * expansion check flag
2317 * Returns: T on success, NIL if error
2318 */
2319
2320 long mix_status_update (MAILSTREAM *stream,FILE *statf,long flag)
2321 {
2322 unsigned long i;
2323 char tmp[MAILTMPLEN];
2324 long ret = LONGT;
2325 if (!stream->rdonly) { /* do nothing if stream readonly */
2326 if (flag) { /* need to do expansion check? */
2327 char tmp[MAILTMPLEN];
2328 size_t size;
2329 struct stat sbuf;
2330 /* calculate file size we need */
2331 for (i = 1, size = 0; i <= stream->nmsgs; ++i)
2332 if (!mail_elt (stream,i)->private.ghost) ++size;
2333 if (size) { /* number of living messages */
2334 sprintf (tmp,STRFMT,(unsigned long) 0,(unsigned long) 0,0,
2335 (unsigned long) 0);
2336 size *= strlen (tmp);
2337 }
2338 sprintf (tmp,SEQFMT,LOCAL->statusseq);
2339 size += strlen (tmp);
2340 /* get current file size */
2341 if (fstat (fileno (statf),&sbuf)) {
2342 MM_LOG ("Error getting size of mix status file",ERROR);
2343 ret = NIL;
2344 }
2345 /* need to write additional space? */
2346 else if (sbuf.st_size < size) {
2347 void *buf = fs_get (size -= sbuf.st_size);
2348 memset (buf,0,size);
2349 if (fseek (statf,0,SEEK_END) || (fwrite (buf,1,size,statf) != size) ||
2350 fflush (statf)) {
2351 fseek (statf,sbuf.st_size,SEEK_SET);
2352 ftruncate (fileno (statf),sbuf.st_size);
2353 MM_LOG ("Error extending mix status file",ERROR);
2354 ret = NIL;
2355 }
2356 fs_give ((void **) &buf);
2357 }
2358 }
2359 \f
2360 if (ret) { /* if still good to go */
2361 rewind (statf); /* let's start at the very beginning */
2362 /* write sequence */
2363 fprintf (statf,SEQFMT,LOCAL->statusseq);
2364 /* write message status records */
2365 for (i = 1; ret && (i <= stream->nmsgs); ++i) {
2366 MESSAGECACHE *elt = mail_elt (stream,i);
2367 /* make sure all messages have a modseq */
2368 if (!elt->private.mod) elt->private.mod = LOCAL->statusseq;
2369 if (!elt->private.ghost)/* only write living messages */
2370 fprintf (statf,STRFMT,elt->private.uid,elt->user_flags,
2371 (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
2372 (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
2373 (fDRAFT * elt->draft) + (elt->valid ? fOLD : NIL),
2374 elt->private.mod);
2375 if (ferror (statf)) {
2376 sprintf (tmp,"Error updating mix status file: %.80s",
2377 strerror (errno));
2378 MM_LOG (tmp,ERROR);
2379 ret = NIL;
2380 }
2381 }
2382 if (ret && fflush (statf)) {
2383 MM_LOG ("Error flushing mix status file",ERROR);
2384 ret = NIL;
2385 }
2386 if (ret) ftruncate (fileno (statf),ftell (statf));
2387 }
2388 }
2389 return ret;
2390 }
2391 \f
2392 /* MIX data file routines */
2393
2394
2395 /* MIX open data file
2396 * Accepts: MAIL stream
2397 * pointer to returned fd if success
2398 * pointer to returned size if success
2399 * size of new data to be added
2400 * Returns: open FILE, or NIL if failure
2401 *
2402 * The curend test assumes that the last message of the mailbox is the furthest
2403 * point that the current data file extends, and thus that is all that needs to
2404 * be tested for short file prevention.
2405 */
2406
2407 FILE *mix_data_open (MAILSTREAM *stream,int *fd,long *size,
2408 unsigned long newsize)
2409 {
2410 FILE *msgf = NIL;
2411 struct stat sbuf;
2412 MESSAGECACHE *elt = stream->nmsgs ? mail_elt (stream,stream->nmsgs) : NIL;
2413 unsigned long curend = (elt && (elt->private.spare.data == LOCAL->newmsg)) ?
2414 elt->private.special.offset + elt->private.msg.header.offset +
2415 elt->rfc822_size : 0;
2416 /* allow create if curend 0 */
2417 if ((*fd = open (mix_file_data (LOCAL->buf,stream->mailbox,LOCAL->newmsg),
2418 O_RDWR | (curend ? NIL : O_CREAT),NIL)) >= 0) {
2419 fstat (*fd,&sbuf); /* get current file size */
2420 /* can we use this file? */
2421 if ((curend <= sbuf.st_size) &&
2422 (!sbuf.st_size || ((sbuf.st_size + newsize) <= MIXDATAROLL)))
2423 *size = sbuf.st_size; /* yes, return current size */
2424 else { /* short file or becoming too long */
2425 if (curend > sbuf.st_size) {
2426 char tmp[MAILTMPLEN];
2427 sprintf (tmp,"short mix message file %.08lx (%ld > %ld), rolling",
2428 LOCAL->newmsg,curend,(unsigned long) sbuf.st_size);
2429 MM_LOG (tmp,WARN); /* shouldn't happen */
2430 }
2431 close (*fd); /* roll to a new file */
2432 errno = NIL;
2433 while ((*fd = open (mix_file_data
2434 (LOCAL->buf,stream->mailbox,
2435 LOCAL->newmsg = mix_modseq (LOCAL->newmsg)),
2436 O_RDWR | O_CREAT | O_EXCL,sbuf.st_mode)) < 0) {
2437 switch(errno) {
2438 case EEXIST: /* always retry if path exists or interrupt */
2439 case EINTR:
2440 errno = NIL;
2441 break;
2442 default: /* probably EDQUOT */
2443 {
2444 char tmp[MAILTMPLEN];
2445 sprintf (tmp,"data file %.08lx creation failure: %.80s",
2446 LOCAL->newmsg,strerror (errno));
2447 MM_LOG (tmp,ERROR); /* shouldn't happen */
2448 return NIL;
2449 }
2450 }
2451 }
2452 *size = 0; /* brand new file */
2453 fchmod (*fd,sbuf.st_mode);/* with same mode as previous file */
2454 }
2455 }
2456 if (*fd >= 0) { /* have a data file? */
2457 /* yes, get stdio and set position */
2458 if ((msgf = fdopen (*fd,"r+b")) != NULL)fseek (msgf,*size,SEEK_SET);
2459 else close (*fd); /* fdopen() failed? */
2460 }
2461 return msgf; /* return results */
2462 }
2463 \f
2464 /* MIX open sortcache
2465 * Accepts: MAIL stream
2466 * Returns: open FILE, or NIL if failure or could only get readonly sortcache
2467 */
2468
2469 FILE *mix_sortcache_open (MAILSTREAM *stream)
2470 {
2471 int fd,refwd;
2472 unsigned long i,uid,sentdate,fromlen,tolen,cclen,subjlen,msgidlen,reflen;
2473 char *s,*t,*msg,tmp[MAILTMPLEN];
2474 MESSAGECACHE *elt;
2475 SORTCACHE *sc;
2476 STRINGLIST *sl;
2477 struct stat sbuf;
2478 int rdonly = NIL;
2479 FILE *srtcf = NIL;
2480 mailcache_t mc = (mailcache_t) mail_parameters (NIL,GET_CACHE,NIL);
2481 fstat (LOCAL->mfd,&sbuf);
2482 if (!stream->nmsgs); /* do nothing if mailbox empty */
2483 /* open sortcache file */
2484 else if (((fd = open (LOCAL->sortcache,O_RDWR|O_CREAT,sbuf.st_mode)) < 0) &&
2485 !(rdonly = ((fd = open (LOCAL->sortcache,O_RDONLY,NIL)) >= 0)))
2486 MM_LOG ("Error opening mix sortcache file",WARN);
2487 /* acquire lock and FILE */
2488 else if (!flock (fd,rdonly ? LOCK_SH : LOCK_EX) &&
2489 !(srtcf = fdopen (fd,rdonly ? "rb" : "r+b"))) {
2490 MM_LOG ("Error obtaining stream on mix sortcache file",WARN);
2491 flock (fd,LOCK_UN); /* relinquish lock */
2492 close (fd);
2493 }
2494 else if (!(i = mix_read_sequence (srtcf)) || (i < LOCAL->sortcacheseq))
2495 MM_LOG ("Error in mix sortcache file sequence record",WARN);
2496 /* sequence changed from last time? */
2497 else if (i > LOCAL->sortcacheseq) {
2498 LOCAL->sortcacheseq = i; /* update sequence */
2499 while ((s = t = mix_read_record (srtcf,LOCAL->buf,LOCAL->buflen,
2500 "sortcache")) && *s &&
2501 (msg = "uid") && (*s++ == ':') && isxdigit (*s)) {
2502 uid = strtoul (s,&s,16);
2503 if ((*s++ == ':') && isxdigit (*s)) {
2504 sentdate = strtoul (s,&s,16);
2505 if ((*s++ == ':') && isxdigit (*s)) {
2506 fromlen = strtoul (s,&s,16);
2507 if ((*s++ == ':') && isxdigit (*s)) {
2508 tolen = strtoul (s,&s,16);
2509 if ((*s++ == ':') && isxdigit (*s)) {
2510 cclen = strtoul (s,&s,16);
2511 if ((*s++ == ':') && ((*s == 'R') || (*s == ' ')) &&
2512 isxdigit (s[1])) {
2513 refwd = (*s++ == 'R') ? T : NIL;
2514 subjlen = strtoul (s,&s,16);
2515 if ((*s++ == ':') && isxdigit (*s)) {
2516 msgidlen = strtoul (s,&s,16);
2517 if ((*s++ == ':') && isxdigit (*s)) {
2518 reflen = strtoul (s,&s,16);
2519 /* ignore expansion values */
2520 if (*s++ == ':') {
2521 \f
2522 if ((i = mail_msgno (stream,uid)) != 0L) {
2523 sc = (SORTCACHE *) (*mc) (stream,i,CH_SORTCACHE);
2524 sc->size = (elt = mail_elt (stream,i))->rfc822_size;
2525 sc->date = sentdate;
2526 sc->arrival = elt->day ? mail_longdate (elt) : 1;
2527 if (refwd) sc->refwd = T;
2528 if (fromlen) {
2529 if (sc->from) fseek (srtcf,fromlen + 2,SEEK_CUR);
2530 else if ((getc (srtcf) != 'F') ||
2531 (fread (sc->from = (char *) fs_get(fromlen),
2532 1,fromlen-1,srtcf) != (fromlen-1))||
2533 (sc->from[fromlen-1] = '\0') ||
2534 (getc (srtcf) != '\015') ||
2535 (getc (srtcf) != '\012')) {
2536 msg = "from data";
2537 break;
2538 }
2539 }
2540 if (tolen) {
2541 if (sc->to) fseek (srtcf,tolen + 2,SEEK_CUR);
2542 else if ((getc (srtcf) != 'T') ||
2543 (fread (sc->to = (char *) fs_get (tolen),
2544 1,tolen-1,srtcf) != (tolen - 1)) ||
2545 (sc->to[tolen-1] = '\0') ||
2546 (getc (srtcf) != '\015') ||
2547 (getc (srtcf) != '\012')) {
2548 msg = "to data";
2549 break;
2550 }
2551 }
2552 if (cclen) {
2553 if (sc->cc) fseek (srtcf,cclen + 2,SEEK_CUR);
2554 else if ((getc (srtcf) != 'C') ||
2555 (fread (sc->cc = (char *) fs_get (cclen),
2556 1,cclen-1,srtcf) != (cclen - 1)) ||
2557 (sc->cc[cclen-1] = '\0') ||
2558 (getc (srtcf) != '\015') ||
2559 (getc (srtcf) != '\012')) {
2560 msg = "cc data";
2561 break;
2562 }
2563 }
2564 if (subjlen) {
2565 if (sc->subject) fseek (srtcf,subjlen + 2,SEEK_CUR);
2566 else if ((getc (srtcf) != 'S') ||
2567 (fread (sc->subject =
2568 (char *) fs_get (subjlen),1,
2569 subjlen-1,srtcf) != (subjlen-1))||
2570 (sc->subject[subjlen-1] = '\0') ||
2571 (getc (srtcf) != '\015') ||
2572 (getc (srtcf) != '\012')) {
2573 msg = "subject data";
2574 break;
2575 }
2576 }
2577 \f
2578 if (msgidlen) {
2579 if (sc->message_id)
2580 fseek (srtcf,msgidlen + 2,SEEK_CUR);
2581 else if ((getc (srtcf) != 'M') ||
2582 (fread (sc->message_id =
2583 (char *) fs_get (msgidlen),1,
2584 msgidlen-1,srtcf) != (msgidlen-1))||
2585 (sc->message_id[msgidlen-1] = '\0') ||
2586 (getc (srtcf) != '\015') ||
2587 (getc (srtcf) != '\012')) {
2588 msg = "message-id data";
2589 break;
2590 }
2591 }
2592 if (reflen) {
2593 if (sc->references) fseek(srtcf,reflen + 2,SEEK_CUR);
2594 /* make sure it fits */
2595 else {
2596 if (reflen >= LOCAL->buflen) {
2597 fs_give ((void **) &LOCAL->buf);
2598 LOCAL->buf = (char *)
2599 fs_get ((LOCAL->buflen = reflen) + 1);
2600 }
2601 if ((getc (srtcf) != 'R') ||
2602 (fread (LOCAL->buf,1,reflen-1,srtcf) !=
2603 (reflen - 1)) ||
2604 (LOCAL->buf[reflen-1] = '\0') ||
2605 (getc (srtcf) != '\015') ||
2606 (getc (srtcf) != '\012')) {
2607 msg = "references data";
2608 break;
2609 }
2610 for (s = LOCAL->buf,sl = NIL,
2611 sc->references = mail_newstringlist ();
2612 s && *s; s += i + 1) {
2613 if ((i = strtoul (s,&s,16)) && (*s++ == ':') &&
2614 (s[i] == ':')) {
2615 if (sl) sl = sl->next = mail_newstringlist();
2616 else sl = sc->references;
2617 s[i] = '\0';
2618 sl->text.data = cpystr (s);
2619 sl->text.size = i;
2620 }
2621 else s = NIL;
2622 }
2623 if (!s || *s ||
2624 (s != ((char *) LOCAL->buf + reflen - 1))) {
2625 msg = "references length consistency check";
2626 break;
2627 }
2628 }
2629 }
2630 }
2631 \f
2632 /* UID not found, ignore this message */
2633 else fseek (srtcf,((fromlen ? fromlen + 2 : 0) +
2634 (tolen ? tolen + 2 : 0) +
2635 (cclen ? cclen + 2 : 0) +
2636 (subjlen ? subjlen + 2 : 0) +
2637 (msgidlen ? msgidlen + 2 : 0) +
2638 (reflen ? reflen + 2 : 0)),
2639 SEEK_CUR);
2640 continue;
2641 }
2642 else msg = "expansion";
2643 }
2644 else msg = "references";
2645 }
2646 else msg = "message-id";
2647 }
2648 else msg = "subject";
2649 }
2650 else msg = "cc";
2651 }
2652 else msg = "to";
2653 }
2654 else msg = "from";
2655 }
2656 else msg = "sentdate";
2657 break; /* error somewhere */
2658 }
2659 if (!t || *t) { /* error detected? */
2660 if (t) { /* non-null means bogus record */
2661 sprintf (tmp,"Error in %s in mix sortcache record: %.500s",msg,t);
2662 MM_LOG (tmp,WARN);
2663 }
2664 fclose (srtcf); /* either way, must punt */
2665 srtcf = NIL;
2666 }
2667 }
2668 if (rdonly && srtcf) { /* can't update if readonly */
2669 unlink (LOCAL->sortcache); /* try deleting it */
2670 fclose (srtcf); /* so close it and return as if error */
2671 srtcf = NIL;
2672 }
2673 else fchmod (fd,sbuf.st_mode);
2674 return srtcf;
2675 }
2676 \f
2677 /* MIX update and close sortcache
2678 * Accepts: MAIL stream
2679 * pointer to open FILE (if FILE is NIL, do nothing)
2680 * Returns: T on success, NIL on error
2681 */
2682
2683 long mix_sortcache_update (MAILSTREAM *stream,FILE **sortcache)
2684 {
2685 FILE *f = *sortcache;
2686 long ret = LONGT;
2687 if (f) { /* ignore if no file */
2688 unsigned long i,j;
2689 mailcache_t mc = (mailcache_t) mail_parameters (NIL,GET_CACHE,NIL);
2690 for (i = 1; (i <= stream->nmsgs) &&
2691 !((SORTCACHE *) (*mc) (stream,i,CH_SORTCACHE))->dirty; ++i);
2692 if (i <= stream->nmsgs) { /* only update if some entry is dirty */
2693 rewind (f); /* let's start at the very beginning */
2694 /* write sequence */
2695 fprintf (f,SEQFMT,LOCAL->sortcacheseq = mix_modseq(LOCAL->sortcacheseq));
2696 for (i = 1; ret && (i <= stream->nmsgs); ++i) {
2697 MESSAGECACHE *elt = mail_elt (stream,i);
2698 SORTCACHE *s = (SORTCACHE *) (*mc) (stream,i,CH_SORTCACHE);
2699 STRINGLIST *sl;
2700 s->dirty = NIL; /* no longer dirty */
2701 if ((sl = s->references) != NULL) /* count length of references */
2702 for (j = 1; sl && sl->text.data; sl = sl->next)
2703 j += 10 + sl->text.size;
2704 else j = 0; /* no references yet */
2705 fprintf (f,SCRFMT,elt->private.uid,s->date,
2706 s->from ? strlen (s->from) + 1 : 0,
2707 s->to ? strlen (s->to) + 1 : 0,s->cc ? strlen (s->cc) + 1 : 0,
2708 s->refwd ? 'R' : ' ',s->subject ? strlen (s->subject) + 1: 0,
2709 s->message_id ? strlen (s->message_id) + 1 : 0,j);
2710 if (s->from) fprintf (f,"F%s\015\012",s->from);
2711 if (s->to) fprintf (f,"T%s\015\012",s->to);
2712 if (s->cc) fprintf (f,"C%s\015\012",s->cc);
2713 if (s->subject) fprintf (f,"S%s\015\012",s->subject);
2714 if (s->message_id) fprintf (f,"M%s\015\012",s->message_id);
2715 if (j) { /* any references to write? */
2716 fputc ('R',f); /* yes, do so */
2717 for (sl = s->references; sl && sl->text.data; sl = sl->next)
2718 fprintf (f,"%08lx:%s:",sl->text.size,sl->text.data);
2719 fputs ("\015\012",f);
2720 }
2721 if (ferror (f)) {
2722 MM_LOG ("Error updating mix sortcache file",WARN);
2723 ret = NIL;
2724 }
2725 }
2726 if (ret && fflush (f)) {
2727 MM_LOG ("Error flushing mix sortcache file",WARN);
2728 ret = NIL;
2729 }
2730 if (ret) ftruncate (fileno (f),ftell (f));
2731 }
2732 if (fclose (f)) {
2733 MM_LOG ("Error closing mix sortcache file",WARN);
2734 ret = NIL;
2735 }
2736 }
2737 return ret;
2738 }
2739 \f
2740 /* MIX generic file routines */
2741
2742 /* MIX read record
2743 * Accepts: open FILE
2744 * buffer
2745 * buffer length
2746 * record type
2747 * Returns: buffer if success, else NIL (zero-length buffer means EOF)
2748 */
2749
2750 char *mix_read_record (FILE *f,char *buf,unsigned long buflen,char *type)
2751 {
2752 char *s,tmp[MAILTMPLEN];
2753 /* ensure string tied off */
2754 buf[buflen-2] = buf[buflen-1] = '\0';
2755 while (fgets (buf,buflen-1,f)) {
2756 if ((s = strchr (buf,'\012')) != NULL) {
2757 if ((s != buf) && (s[-1] == '\015')) --s;
2758 *s = '\0'; /* tie off buffer */
2759 if (s != buf) return buf; /* return if non-empty buffer */
2760 sprintf (tmp,"Empty mix %s record",type);
2761 MM_LOG (tmp,WARN);
2762 }
2763 else if (buf[buflen-2]) { /* overlong record is bad news */
2764 sprintf (tmp,"Oversize mix %s record: %.512s",type,buf);
2765 MM_LOG (tmp,ERROR);
2766 return NIL;
2767 }
2768 else {
2769 sprintf (tmp,"Truncated mix %s record: %.512s",type,buf);
2770 MM_LOG (tmp,WARN);
2771 return buf; /* pass to caller anyway */
2772 }
2773 }
2774 buf[0] = '\0'; /* return empty buffer on EOF */
2775 return buf;
2776 }
2777 \f
2778 /* MIX read sequence record
2779 * Accepts: open FILE
2780 * Returns: sequence value, or NIL if failure
2781 */
2782
2783 unsigned long mix_read_sequence (FILE *f)
2784 {
2785 unsigned long ret;
2786 char *s,tmp[MAILTMPLEN];
2787 if (!mix_read_record (f,tmp,MAILTMPLEN-1,"sequence")) return NIL;
2788 switch (tmp[0]) { /* examine record */
2789 case '\0': /* end of file */
2790 ret = 1; /* start a new sequence regime */
2791 break;
2792 case 'S': /* sequence record */
2793 if (isxdigit (tmp[1])) { /* must be followed by hex value */
2794 ret = strtoul (tmp+1,&s,16);
2795 if (!*s) break; /* and nothing more */
2796 }
2797 /* drop into default case */
2798 default: /* anything else is an error */
2799 return NIL; /* return error */
2800 }
2801 return ret;
2802 }
2803 \f
2804 /* MIX internal routines */
2805
2806
2807 /* MIX mail build directory name
2808 * Accepts: destination string
2809 * source
2810 * Returns: destination or empty string if error
2811 */
2812
2813 char *mix_dir (char *dst,char *name)
2814 {
2815 char *s;
2816 /* empty string if mailboxfile fails */
2817 if (!mailboxfile (dst,name)) *dst = '\0';
2818 /* driver-selected INBOX */
2819 else if (!*dst) mailboxfile (dst,"~/INBOX");
2820 /* tie off unnecessary trailing / */
2821 else if ((s = strrchr (dst,'/')) && !s[1]) *s = '\0';
2822 return dst;
2823 }
2824
2825
2826 /* MIX mail build file name
2827 * Accepts: destination string
2828 * directory name
2829 * file name
2830 * Returns: destination
2831 */
2832
2833 char *mix_file (char *dst,char *dir,char *name)
2834 {
2835 sprintf (dst,"%.500s/%.80s%.80s",dir,MIXNAME,name);
2836 return dst;
2837 }
2838
2839
2840 /* MIX mail build file name from data file number
2841 * Accepts: destination string
2842 * directory name
2843 * data file number
2844 * Returns: destination
2845 */
2846
2847 char *mix_file_data (char *dst,char *dir,unsigned long data)
2848 {
2849 char tmp[MAILTMPLEN];
2850 if (data) sprintf (tmp,"%08lx",data);
2851 else tmp[0] = '\0'; /* compatibility with experimental version */
2852 return mix_file (dst,dir,tmp);
2853 }
2854 \f
2855 /* MIX mail get new modseq
2856 * Accepts: old modseq
2857 * Returns: new modseq value
2858 */
2859
2860 unsigned long mix_modseq (unsigned long oldseq)
2861 {
2862 /* normally time now */
2863 unsigned long ret = (unsigned long) time (NIL);
2864 /* ensure that modseq doesn't go backwards */
2865 if (ret <= oldseq) ret = oldseq + 1;
2866 return ret;
2867 }
Alpine is a program to manage e-mail