imapext-2007
diff src/osdep/nt/mbxnt.c @ 0:ada5e610ab86
imap-2007e
author | yuuji@gentei.org |
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date | Mon, 14 Sep 2009 15:17:45 +0900 |
parents | |
children |
line diff
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/osdep/nt/mbxnt.c Mon Sep 14 15:17:45 2009 +0900 1.3 @@ -0,0 +1,1694 @@ 1.4 +/* ======================================================================== 1.5 + * Copyright 1988-2007 University of Washington 1.6 + * 1.7 + * Licensed under the Apache License, Version 2.0 (the "License"); 1.8 + * you may not use this file except in compliance with the License. 1.9 + * You may obtain a copy of the License at 1.10 + * 1.11 + * http://www.apache.org/licenses/LICENSE-2.0 1.12 + * 1.13 + * 1.14 + * ======================================================================== 1.15 + */ 1.16 + 1.17 +/* 1.18 + * Program: MBX mail routines 1.19 + * 1.20 + * Author: Mark Crispin 1.21 + * Networks and Distributed Computing 1.22 + * Computing & Communications 1.23 + * University of Washington 1.24 + * Administration Building, AG-44 1.25 + * Seattle, WA 98195 1.26 + * Internet: MRC@CAC.Washington.EDU 1.27 + * 1.28 + * Date: 3 October 1995 1.29 + * Last Edited: 28 September 2007 1.30 + */ 1.31 + 1.32 + 1.33 +/* FILE TIME SEMANTICS 1.34 + * 1.35 + * The atime is the last read time of the file. 1.36 + * The mtime is the last flags update time of the file. 1.37 + * The ctime is the last write time of the file. 1.38 + */ 1.39 + 1.40 +#include <stdio.h> 1.41 +#include <ctype.h> 1.42 +#include <errno.h> 1.43 +extern int errno; /* just in case */ 1.44 +#include "mail.h" 1.45 +#include "osdep.h" 1.46 +#include <fcntl.h> 1.47 +#include <time.h> 1.48 +#include <sys/stat.h> 1.49 +#include <sys/utime.h> 1.50 +#include "misc.h" 1.51 +#include "dummy.h" 1.52 +#include "fdstring.h" 1.53 + 1.54 + 1.55 +/* Build parameters */ 1.56 + 1.57 +#define HDRSIZE 2048 1.58 + 1.59 +/* MBX I/O stream local data */ 1.60 + 1.61 +typedef struct mbx_local { 1.62 + unsigned int flagcheck: 1; /* if ping should sweep for flags */ 1.63 + unsigned int expok: 1; /* if expunging OK in ping */ 1.64 + unsigned int expunged : 1; /* if one or more expunged messages */ 1.65 + int fd; /* file descriptor for I/O */ 1.66 + int ld; /* lock file descriptor */ 1.67 + int ffuserflag; /* first free user flag */ 1.68 + off_t filesize; /* file size parsed */ 1.69 + time_t filetime; /* last file time */ 1.70 + time_t lastsnarf; /* last snarf time */ 1.71 + unsigned char *buf; /* temporary buffer */ 1.72 + unsigned long buflen; /* current size of temporary buffer */ 1.73 + char lock[MAILTMPLEN]; /* buffer to write lock name */ 1.74 +} MBXLOCAL; 1.75 + 1.76 + 1.77 +/* Convenient access to local data */ 1.78 + 1.79 +#define LOCAL ((MBXLOCAL *) stream->local) 1.80 + 1.81 +/* Function prototypes */ 1.82 + 1.83 +DRIVER *mbx_valid (char *name); 1.84 +int mbx_isvalid (MAILSTREAM **stream,char *name,char *file,int *ld,char *lock, 1.85 + long flags); 1.86 +void *mbx_parameters (long function,void *value); 1.87 +void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents); 1.88 +void mbx_list (MAILSTREAM *stream,char *ref,char *pat); 1.89 +void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat); 1.90 +long mbx_create (MAILSTREAM *stream,char *mailbox); 1.91 +long mbx_delete (MAILSTREAM *stream,char *mailbox); 1.92 +long mbx_rename (MAILSTREAM *stream,char *old,char *newname); 1.93 +long mbx_status (MAILSTREAM *stream,char *mbx,long flags); 1.94 +MAILSTREAM *mbx_open (MAILSTREAM *stream); 1.95 +void mbx_close (MAILSTREAM *stream,long options); 1.96 +void mbx_abort (MAILSTREAM *stream); 1.97 +void mbx_flags (MAILSTREAM *stream,char *sequence,long flags); 1.98 +char *mbx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length, 1.99 + long flags); 1.100 +long mbx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags); 1.101 +void mbx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags); 1.102 +void mbx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt); 1.103 +long mbx_ping (MAILSTREAM *stream); 1.104 +void mbx_check (MAILSTREAM *stream); 1.105 +long mbx_expunge (MAILSTREAM *stream,char *sequence,long options); 1.106 +void mbx_snarf (MAILSTREAM *stream); 1.107 +long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options); 1.108 +long mbx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data); 1.109 + 1.110 +long mbx_parse (MAILSTREAM *stream); 1.111 +MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno,long expok); 1.112 +unsigned long mbx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt); 1.113 +void mbx_update_header (MAILSTREAM *stream); 1.114 +void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags); 1.115 +unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno, 1.116 + unsigned long *size,char **hdr); 1.117 +unsigned long mbx_rewrite (MAILSTREAM *stream,unsigned long *reclaimed, 1.118 + long flags); 1.119 +long mbx_flaglock (MAILSTREAM *stream); 1.120 + 1.121 +/* MBX mail routines */ 1.122 + 1.123 + 1.124 +/* Driver dispatch used by MAIL */ 1.125 + 1.126 +DRIVER mbxdriver = { 1.127 + "mbx", /* driver name */ 1.128 + DR_LOCAL|DR_MAIL|DR_CRLF|DR_LOCKING, 1.129 + /* driver flags */ 1.130 + (DRIVER *) NIL, /* next driver */ 1.131 + mbx_valid, /* mailbox is valid for us */ 1.132 + mbx_parameters, /* manipulate parameters */ 1.133 + mbx_scan, /* scan mailboxes */ 1.134 + mbx_list, /* list mailboxes */ 1.135 + mbx_lsub, /* list subscribed mailboxes */ 1.136 + NIL, /* subscribe to mailbox */ 1.137 + NIL, /* unsubscribe from mailbox */ 1.138 + mbx_create, /* create mailbox */ 1.139 + mbx_delete, /* delete mailbox */ 1.140 + mbx_rename, /* rename mailbox */ 1.141 + mail_status_default, /* status of mailbox */ 1.142 + mbx_open, /* open mailbox */ 1.143 + mbx_close, /* close mailbox */ 1.144 + mbx_flags, /* fetch message "fast" attributes */ 1.145 + mbx_flags, /* fetch message flags */ 1.146 + NIL, /* fetch overview */ 1.147 + NIL, /* fetch message envelopes */ 1.148 + mbx_header, /* fetch message header */ 1.149 + mbx_text, /* fetch message body */ 1.150 + NIL, /* fetch partial message text */ 1.151 + NIL, /* unique identifier */ 1.152 + NIL, /* message number */ 1.153 + mbx_flag, /* modify flags */ 1.154 + mbx_flagmsg, /* per-message modify flags */ 1.155 + NIL, /* search for message based on criteria */ 1.156 + NIL, /* sort messages */ 1.157 + NIL, /* thread messages */ 1.158 + mbx_ping, /* ping mailbox to see if still alive */ 1.159 + mbx_check, /* check for new messages */ 1.160 + mbx_expunge, /* expunge deleted messages */ 1.161 + mbx_copy, /* copy messages to another mailbox */ 1.162 + mbx_append, /* append string message to mailbox */ 1.163 + NIL /* garbage collect stream */ 1.164 +}; 1.165 + 1.166 + /* prototype stream */ 1.167 +MAILSTREAM mbxproto = {&mbxdriver}; 1.168 + 1.169 +/* MBX mail validate mailbox 1.170 + * Accepts: mailbox name 1.171 + * Returns: our driver if name is valid, NIL otherwise 1.172 + */ 1.173 + 1.174 +DRIVER *mbx_valid (char *name) 1.175 +{ 1.176 + char tmp[MAILTMPLEN]; 1.177 + int fd = mbx_isvalid (NIL,name,tmp,NIL,NIL,NIL); 1.178 + if (fd < 0) return NIL; 1.179 + close (fd); /* don't need the fd now */ 1.180 + return &mbxdriver; 1.181 +} 1.182 + 1.183 + 1.184 +/* MBX mail test for valid mailbox 1.185 + * Accepts: returned stream with valid mailbox keywords 1.186 + * mailbox name 1.187 + * buffer to write file name 1.188 + * returned lock fd 1.189 + * returned lock name 1.190 + * RW flags or NIL for readonly 1.191 + * Returns: file descriptor if valid, NIL otherwise 1.192 + */ 1.193 + 1.194 +#define MBXISVALIDNOUID 0x1 /* RW, don't do UID action */ 1.195 +#define MBXISVALIDUID 0x2 /* RW, do UID action */ 1.196 + 1.197 +int mbx_isvalid (MAILSTREAM **stream,char *name,char *file,int *ld,char *lock, 1.198 + long flags) 1.199 +{ 1.200 + int fd,upd; 1.201 + int ret = -1; 1.202 + unsigned long i; 1.203 + long j,k; 1.204 + off_t pos; 1.205 + char c,*s,*t,hdr[HDRSIZE]; 1.206 + struct stat sbuf; 1.207 + struct utimbuf times; 1.208 + int error = EINVAL; /* assume invalid argument */ 1.209 + if (ld) *ld = -1; /* initially no lock */ 1.210 + /* if file, get its status */ 1.211 + if ((s = dummy_file (file,name)) && !stat (s,&sbuf) && 1.212 + ((sbuf.st_mode & S_IFMT) == S_IFREG) && 1.213 + ((fd = open (file,(flags ? O_RDWR : O_RDONLY)|O_BINARY,NIL)) >= 0)) { 1.214 + error = -1; /* assume bogus format */ 1.215 + if (((((j = read (fd,hdr,HDRSIZE)) == HDRSIZE) && (hdr[0] == '*')) || 1.216 + /* locked, set byte 0 to "*", read rest */ 1.217 + ((j < 0) && (lseek (fd,1,L_SET) == 1) && 1.218 + (read (fd,hdr+1,HDRSIZE-1) == (HDRSIZE-1)) && (hdr[0] = '*'))) && 1.219 + (hdr[1] == 'm') && (hdr[2] == 'b') && (hdr[3] == 'x') && 1.220 + (hdr[4] == '*') && (hdr[5] == '\015') && (hdr[6] == '\012') && 1.221 + isxdigit (hdr[7]) && isxdigit (hdr[8]) && isxdigit (hdr[9]) && 1.222 + isxdigit (hdr[10]) && isxdigit (hdr[11]) && isxdigit (hdr[12]) && 1.223 + isxdigit (hdr[13]) && isxdigit (hdr[14]) && isxdigit (c = hdr[15]) && 1.224 + isxdigit (hdr[16]) && isxdigit (hdr[17]) && isxdigit (hdr[18]) && 1.225 + isxdigit (hdr[19]) && isxdigit (hdr[20]) && isxdigit (hdr[21]) && 1.226 + isxdigit (hdr[22]) && (hdr[23] == '\015') && (hdr[24] == '\012')) { 1.227 + ret = fd; /* mbx format */ 1.228 + 1.229 + if (stream) { /* lock if making a mini-stream */ 1.230 + if (flock (fd,LOCK_SH) || 1.231 + (flags && ((*ld = lockname (lock,file,LOCK_EX)) < 0))) ret = -1; 1.232 + /* reread data now that locked */ 1.233 + else if (lseek (fd,0,L_SET) || 1.234 + (read (fd,hdr+1,HDRSIZE-1) != (HDRSIZE-1))) ret = -1; 1.235 + else { 1.236 + *stream = (MAILSTREAM *) memset (fs_get (sizeof (MAILSTREAM)),0, 1.237 + sizeof (MAILSTREAM)); 1.238 + hdr[15] = '\0'; /* tie off UIDVALIDITY */ 1.239 + (*stream)->uid_validity = strtoul (hdr+7,NIL,16); 1.240 + hdr[15] = c; /* now get UIDLAST */ 1.241 + (*stream)->uid_last = strtoul (hdr+15,NIL,16); 1.242 + /* parse user flags */ 1.243 + for (i = 0, s = hdr + 25; 1.244 + (i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s); 1.245 + i++, s = t + 2) { 1.246 + *t = '\0'; /* tie off flag */ 1.247 + if (strlen (s) <= MAXUSERFLAG) 1.248 + (*stream)->user_flags[i] = cpystr (s); 1.249 + } 1.250 + /* make sure have true UIDLAST */ 1.251 + if (flags & MBXISVALIDUID) { 1.252 + for (upd = NIL,pos = 2048, k = 0; pos < sbuf.st_size; 1.253 + pos += (j + k)) { 1.254 + /* read header for this message */ 1.255 + lseek (fd,pos,L_SET); 1.256 + if ((j = read (fd,hdr,64)) >= 0) { 1.257 + hdr[j] = '\0'; 1.258 + if ((s = strchr (hdr,'\015')) && (s[1] == '\012')) { 1.259 + *s = '\0'; 1.260 + k = s + 2 - hdr; 1.261 + if ((s = strchr (hdr,',')) && (j = strtol (s+1,&s,10)) && 1.262 + (*s == ';') && (s = strchr (s+1,'-'))) { 1.263 + /* get UID if there is any */ 1.264 + i = strtoul (++s,&t,16); 1.265 + if (!*t && (t == (s + 8)) && (i <= (*stream)->uid_last)) { 1.266 + if (!i) { 1.267 + lseek (fd,pos + s - hdr,L_SET); 1.268 + sprintf (hdr,"%08lx",++(*stream)->uid_last); 1.269 + write (fd,hdr,8); 1.270 + upd = T; 1.271 + } 1.272 + continue; 1.273 + } 1.274 + } 1.275 + } 1.276 + ret = -1; /* error, give up */ 1.277 + *stream = mail_close (*stream); 1.278 + pos = sbuf.st_size + 1; 1.279 + j = k = 0; 1.280 + } 1.281 + } 1.282 + 1.283 + if (upd) { /* need to update hdr with new UIDLAST? */ 1.284 + lseek (fd,15,L_SET); 1.285 + sprintf (hdr,"%08lx",(*stream)->uid_last); 1.286 + write (fd,hdr,8); 1.287 + } 1.288 + } 1.289 + } 1.290 + } 1.291 + } 1.292 + if (ret != fd) close (fd); /* close the file */ 1.293 + else lseek (fd,0,L_SET); /* else rewind to start */ 1.294 + /* \Marked status? */ 1.295 + if (sbuf.st_ctime > sbuf.st_atime) { 1.296 + /* preserve atime and mtime */ 1.297 + times.actime = sbuf.st_atime; 1.298 + times.modtime = sbuf.st_mtime; 1.299 + utime (file,×); /* set the times */ 1.300 + } 1.301 + } 1.302 + /* in case INBOX but not mbx format */ 1.303 + else if (((error = errno) == ENOENT) && !compare_cstring (name,"INBOX")) 1.304 + error = -1; 1.305 + if ((ret < 0) && ld && (*ld >= 0)) { 1.306 + unlockfd (*ld,lock); 1.307 + *ld = -1; 1.308 + } 1.309 + errno = error; /* return as last error */ 1.310 + return ret; /* return what we should */ 1.311 +} 1.312 + 1.313 +/* MBX manipulate driver parameters 1.314 + * Accepts: function code 1.315 + * function-dependent value 1.316 + * Returns: function-dependent return value 1.317 + */ 1.318 + 1.319 +void *mbx_parameters (long function,void *value) 1.320 +{ 1.321 + void *ret = NIL; 1.322 + switch ((int) function) { 1.323 + case SET_ONETIMEEXPUNGEATPING: 1.324 + if (value) ((MBXLOCAL *) ((MAILSTREAM *) value)->local)->expok = T; 1.325 + case GET_ONETIMEEXPUNGEATPING: 1.326 + if (value) ret = (void *) 1.327 + (((MBXLOCAL *) ((MAILSTREAM *) value)->local)->expok ? VOIDT : NIL); 1.328 + break; 1.329 + } 1.330 + return ret; 1.331 +} 1.332 + 1.333 + 1.334 +/* MBX mail scan mailboxes 1.335 + * Accepts: mail stream 1.336 + * reference 1.337 + * pattern to search 1.338 + * string to scan 1.339 + */ 1.340 + 1.341 +void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents) 1.342 +{ 1.343 + if (stream) dummy_scan (NIL,ref,pat,contents); 1.344 +} 1.345 + 1.346 + 1.347 +/* MBX mail list mailboxes 1.348 + * Accepts: mail stream 1.349 + * reference 1.350 + * pattern to search 1.351 + */ 1.352 + 1.353 +void mbx_list (MAILSTREAM *stream,char *ref,char *pat) 1.354 +{ 1.355 + if (stream) dummy_list (NIL,ref,pat); 1.356 +} 1.357 + 1.358 + 1.359 +/* MBX mail list subscribed mailboxes 1.360 + * Accepts: mail stream 1.361 + * reference 1.362 + * pattern to search 1.363 + */ 1.364 + 1.365 +void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat) 1.366 +{ 1.367 + if (stream) dummy_lsub (NIL,ref,pat); 1.368 +} 1.369 + 1.370 +/* MBX mail create mailbox 1.371 + * Accepts: MAIL stream 1.372 + * mailbox name to create 1.373 + * Returns: T on success, NIL on failure 1.374 + */ 1.375 + 1.376 +long mbx_create (MAILSTREAM *stream,char *mailbox) 1.377 +{ 1.378 + char *s,mbx[MAILTMPLEN],tmp[HDRSIZE]; 1.379 + long ret = NIL; 1.380 + int i,fd; 1.381 + if (!(s = dummy_file (mbx,mailbox))) { 1.382 + sprintf (mbx,"Can't create %.80s: invalid name",mailbox); 1.383 + mm_log (mbx,ERROR); 1.384 + } 1.385 + /* create underlying file */ 1.386 + else if (dummy_create (stream,s)) { 1.387 + /* done if made directory */ 1.388 + if ((s = strrchr (s,'\\')) && !s[1]) return T; 1.389 + if ((fd = open (mbx,O_WRONLY|O_BINARY,NIL)) < 0) { 1.390 + sprintf (tmp,"Can't reopen mailbox node %.80s: %s",mbx,strerror (errno)); 1.391 + mm_log (tmp,ERROR); 1.392 + unlink (mbx); /* delete the file */ 1.393 + } 1.394 + else { 1.395 + memset (tmp,'\0',HDRSIZE);/* initialize header */ 1.396 + sprintf (s = tmp,"*mbx*\015\012%08lx00000000\015\012", 1.397 + (unsigned long) time (0)); 1.398 + for (i = 0; i < NUSERFLAGS; ++i) 1.399 + sprintf (s += strlen (s),"%s\015\012", 1.400 + (stream && stream->user_flags[i]) ? stream->user_flags[i] : 1.401 + ""); 1.402 + if (write (fd,tmp,HDRSIZE) != HDRSIZE) { 1.403 + sprintf (tmp,"Can't initialize mailbox node %.80s: %s", 1.404 + mbx,strerror (errno)); 1.405 + mm_log (tmp,ERROR); 1.406 + unlink (mbx); /* delete the file */ 1.407 + } 1.408 + else ret = T; /* success */ 1.409 + close (fd); /* close file */ 1.410 + } 1.411 + } 1.412 + return ret; 1.413 +} 1.414 + 1.415 + 1.416 +/* MBX mail delete mailbox 1.417 + * Accepts: MAIL stream 1.418 + * mailbox name to delete 1.419 + * Returns: T on success, NIL on failure 1.420 + */ 1.421 + 1.422 +long mbx_delete (MAILSTREAM *stream,char *mailbox) 1.423 +{ 1.424 + return mbx_rename (stream,mailbox,NIL); 1.425 +} 1.426 + 1.427 +/* MBX mail rename mailbox 1.428 + * Accepts: MAIL stream 1.429 + * old mailbox name 1.430 + * new mailbox name (or NIL for delete) 1.431 + * Returns: T on success, NIL on failure 1.432 + */ 1.433 + 1.434 +long mbx_rename (MAILSTREAM *stream,char *old,char *newname) 1.435 +{ 1.436 + long ret = LONGT; 1.437 + char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN]; 1.438 + int fd,ld; 1.439 + struct stat sbuf; 1.440 + if (!dummy_file (file,old) || 1.441 + (newname && (!((s = mailboxfile (tmp,newname)) && *s) || 1.442 + ((s = strrchr (tmp,'\\')) && !s[1])))) { 1.443 + sprintf (tmp,newname ? 1.444 + "Can't rename mailbox %.80s to %.80s: invalid name" : 1.445 + "Can't delete mailbox %.80s: invalid name", 1.446 + old,newname); 1.447 + mm_log (tmp,ERROR); 1.448 + return NIL; 1.449 + } 1.450 + else if ((fd = open (file,O_RDWR|O_BINARY,NIL)) < 0) { 1.451 + sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno)); 1.452 + mm_log (tmp,ERROR); 1.453 + return NIL; 1.454 + } 1.455 + /* get parse/append permission */ 1.456 + if ((ld = lockname (lock,file,LOCK_EX)) < 0) { 1.457 + mm_log ("Unable to lock rename mailbox",ERROR); 1.458 + return NIL; 1.459 + } 1.460 + /* lock out other users */ 1.461 + if (flock (fd,LOCK_EX|LOCK_NB)) { 1.462 + close (fd); /* couldn't lock, give up on it then */ 1.463 + sprintf (tmp,"Mailbox %.80s is in use by another process",old); 1.464 + mm_log (tmp,ERROR); 1.465 + unlockfd (ld,lock); /* release exclusive parse/append permission */ 1.466 + return NIL; 1.467 + } 1.468 + 1.469 + if (newname) { /* want rename? */ 1.470 + /* found superior to destination name? */ 1.471 + if ((s = strrchr (tmp,'\\')) && (s != tmp) && 1.472 + ((tmp[1] != ':') || (s != tmp + 2))) { 1.473 + c = s[1]; /* remember character after delimiter */ 1.474 + *s = s[1] = '\0'; /* tie off name at delimiter */ 1.475 + /* name doesn't exist, create it */ 1.476 + if (stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) { 1.477 + *s = '\\'; /* restore delimiter */ 1.478 + if (!dummy_create (stream,tmp)) ret = NIL; 1.479 + } 1.480 + else *s = '\\'; /* restore delimiter */ 1.481 + s[1] = c; /* restore character after delimiter */ 1.482 + } 1.483 + flock (fd,LOCK_UN); /* release lock on the file */ 1.484 + close (fd); /* pacify NTFS */ 1.485 + /* rename the file */ 1.486 + if (ret && rename (file,tmp)) { 1.487 + sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",old,newname, 1.488 + strerror (errno)); 1.489 + mm_log (tmp,ERROR); 1.490 + ret = NIL; /* set failure */ 1.491 + } 1.492 + } 1.493 + else { 1.494 + flock (fd,LOCK_UN); /* release lock on the file */ 1.495 + close (fd); /* pacify NTFS */ 1.496 + if (unlink (file)) { 1.497 + sprintf (tmp,"Can't delete mailbox %.80s: %s",old,strerror (errno)); 1.498 + mm_log (tmp,ERROR); 1.499 + ret = NIL; /* set failure */ 1.500 + } 1.501 + } 1.502 + unlockfd (ld,lock); /* release exclusive parse/append permission */ 1.503 + /* recreate file if renamed INBOX */ 1.504 + if (ret && !compare_cstring (old,"INBOX")) mbx_create (NIL,"INBOX"); 1.505 + return ret; /* return success */ 1.506 +} 1.507 + 1.508 +/* MBX mail open 1.509 + * Accepts: stream to open 1.510 + * Returns: stream on success, NIL on failure 1.511 + */ 1.512 + 1.513 +MAILSTREAM *mbx_open (MAILSTREAM *stream) 1.514 +{ 1.515 + int fd,ld; 1.516 + short silent; 1.517 + char tmp[MAILTMPLEN]; 1.518 + if (!stream) return &mbxproto;/* return prototype for OP_PROTOTYPE call */ 1.519 + if (stream->local) fatal ("mbx recycle stream"); 1.520 + /* canonicalize the mailbox name */ 1.521 + if (!dummy_file (tmp,stream->mailbox)) { 1.522 + sprintf (tmp,"Can't open - invalid name: %.80s",stream->mailbox); 1.523 + mm_log (tmp,ERROR); 1.524 + } 1.525 + if (stream->rdonly || 1.526 + (fd = open (tmp,O_RDWR|O_BINARY,NIL)) < 0) { 1.527 + if ((fd = open (tmp,O_RDONLY|O_BINARY,NIL)) < 0) { 1.528 + sprintf (tmp,"Can't open mailbox: %s",strerror (errno)); 1.529 + mm_log (tmp,ERROR); 1.530 + return NIL; 1.531 + } 1.532 + else if (!stream->rdonly) { /* got it, but readonly */ 1.533 + mm_log ("Can't get write access to mailbox, access is readonly",WARN); 1.534 + stream->rdonly = T; 1.535 + } 1.536 + } 1.537 + 1.538 + stream->local = memset (fs_get (sizeof (MBXLOCAL)),NIL,sizeof (MBXLOCAL)); 1.539 + LOCAL->fd = fd; /* bind the file */ 1.540 + LOCAL->ld = -1; /* no flaglock */ 1.541 + LOCAL->buf = (char *) fs_get (CHUNKSIZE); 1.542 + LOCAL->buflen = CHUNKSIZE - 1; 1.543 + /* note if an INBOX or not */ 1.544 + stream->inbox = !compare_cstring (stream->mailbox,"INBOX"); 1.545 + fs_give ((void **) &stream->mailbox); 1.546 + stream->mailbox = cpystr (tmp); 1.547 + /* get parse/append permission */ 1.548 + if ((ld = lockname (tmp,stream->mailbox,LOCK_EX)) < 0) { 1.549 + mm_log ("Unable to lock open mailbox",ERROR); 1.550 + return NIL; 1.551 + } 1.552 + flock (LOCAL->fd,LOCK_SH); /* lock the file */ 1.553 + unlockfd (ld,tmp); /* release shared parse permission */ 1.554 + LOCAL->filesize = HDRSIZE; /* initialize parsed file size */ 1.555 + LOCAL->filetime = 0; /* time not set up yet */ 1.556 + LOCAL->expok = LOCAL->flagcheck = NIL; 1.557 + stream->sequence++; /* bump sequence number */ 1.558 + /* parse mailbox */ 1.559 + stream->nmsgs = stream->recent = 0; 1.560 + silent = stream->silent; /* defer events */ 1.561 + stream->silent = T; 1.562 + if (mbx_ping (stream) && !stream->nmsgs) 1.563 + mm_log ("Mailbox is empty",(long) NIL); 1.564 + stream->silent = silent; /* now notify upper level */ 1.565 + mail_exists (stream,stream->nmsgs); 1.566 + mail_recent (stream,stream->recent); 1.567 + if (!LOCAL) return NIL; /* failure if stream died */ 1.568 + stream->perm_seen = stream->perm_deleted = stream->perm_flagged = 1.569 + stream->perm_answered = stream->perm_draft = stream->rdonly ? NIL : T; 1.570 + stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff; 1.571 + stream->kwd_create = (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ? 1.572 + NIL : T; /* can we create new user flags? */ 1.573 + return stream; /* return stream to caller */ 1.574 +} 1.575 + 1.576 +/* MBX mail close 1.577 + * Accepts: MAIL stream 1.578 + * close options 1.579 + */ 1.580 + 1.581 +void mbx_close (MAILSTREAM *stream,long options) 1.582 +{ 1.583 + if (stream && LOCAL) { /* only if a file is open */ 1.584 + int silent = stream->silent; 1.585 + stream->silent = T; /* note this stream is dying */ 1.586 + /* do an expunge if requested */ 1.587 + if (options & CL_EXPUNGE) mbx_expunge (stream,NIL,NIL); 1.588 + else { /* otherwise do a checkpoint to purge */ 1.589 + LOCAL->expok = T; /* possible expunged messages */ 1.590 + mbx_ping (stream); 1.591 + } 1.592 + stream->silent = silent; /* restore previous status */ 1.593 + mbx_abort (stream); 1.594 + } 1.595 +} 1.596 + 1.597 + 1.598 +/* MBX mail abort stream 1.599 + * Accepts: MAIL stream 1.600 + */ 1.601 + 1.602 +void mbx_abort (MAILSTREAM *stream) 1.603 +{ 1.604 + if (stream && LOCAL) { /* only if a file is open */ 1.605 + flock (LOCAL->fd,LOCK_UN); /* unlock local file */ 1.606 + close (LOCAL->fd); /* close the local file */ 1.607 + /* free local text buffer */ 1.608 + if (LOCAL->buf) fs_give ((void **) &LOCAL->buf); 1.609 + /* nuke the local data */ 1.610 + fs_give ((void **) &stream->local); 1.611 + stream->dtb = NIL; /* log out the DTB */ 1.612 + } 1.613 +} 1.614 + 1.615 + 1.616 +/* MBX mail fetch flags 1.617 + * Accepts: MAIL stream 1.618 + * sequence 1.619 + * option flags 1.620 + * Sniffs at file to see if some other process changed the flags 1.621 + */ 1.622 + 1.623 +void mbx_flags (MAILSTREAM *stream,char *sequence,long flags) 1.624 +{ 1.625 + MESSAGECACHE *elt; 1.626 + unsigned long i; 1.627 + if (mbx_ping (stream) && /* ping mailbox, get new status for messages */ 1.628 + ((flags & FT_UID) ? mail_uid_sequence (stream,sequence) : 1.629 + mail_sequence (stream,sequence))) 1.630 + for (i = 1; i <= stream->nmsgs; i++) 1.631 + if ((elt = mail_elt (stream,i))->sequence && !elt->valid) 1.632 + mbx_elt (stream,i,NIL); 1.633 +} 1.634 + 1.635 +/* MBX mail fetch message header 1.636 + * Accepts: MAIL stream 1.637 + * message # to fetch 1.638 + * pointer to returned header text length 1.639 + * option flags 1.640 + * Returns: message header in RFC822 format 1.641 + */ 1.642 + 1.643 +char *mbx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length, 1.644 + long flags) 1.645 +{ 1.646 + unsigned long i; 1.647 + char *s; 1.648 + *length = 0; /* default to empty */ 1.649 + if (flags & FT_UID) return "";/* UID call "impossible" */ 1.650 + /* get header position, possibly header */ 1.651 + i = mbx_hdrpos (stream,msgno,length,&s); 1.652 + if (!s) { /* mbx_hdrpos() returned header? */ 1.653 + lseek (LOCAL->fd,i,L_SET); /* no, get to header position */ 1.654 + /* is buffer big enough? */ 1.655 + if (*length > LOCAL->buflen) { 1.656 + fs_give ((void **) &LOCAL->buf); 1.657 + LOCAL->buf = (char *) fs_get ((LOCAL->buflen = *length) + 1); 1.658 + } 1.659 + /* slurp the data */ 1.660 + read (LOCAL->fd,s = LOCAL->buf,*length); 1.661 + } 1.662 + s[*length] = '\0'; /* tie off string */ 1.663 + return s; 1.664 +} 1.665 + 1.666 +/* MBX mail fetch message text (body only) 1.667 + * Accepts: MAIL stream 1.668 + * message # to fetch 1.669 + * pointer to returned header text length 1.670 + * option flags 1.671 + * Returns: T on success, NIL on failure 1.672 + */ 1.673 + 1.674 +long mbx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags) 1.675 +{ 1.676 + FDDATA d; 1.677 + unsigned long i,j; 1.678 + MESSAGECACHE *elt; 1.679 + /* UID call "impossible" */ 1.680 + if (flags & FT_UID) return NIL; 1.681 + /* get message status */ 1.682 + elt = mbx_elt (stream,msgno,NIL); 1.683 + /* if message not seen */ 1.684 + if (!(flags & FT_PEEK) && !elt->seen && mbx_flaglock (stream)) { 1.685 + elt->seen = T; /* mark message as seen */ 1.686 + /* recalculate status */ 1.687 + mbx_update_status (stream,msgno,NIL); 1.688 + mm_flags (stream,msgno); 1.689 + /* update flags */ 1.690 + mbx_flag (stream,NIL,NIL,NIL); 1.691 + } 1.692 + if (!LOCAL) return NIL; /* mbx_flaglock() could have aborted */ 1.693 + /* find header position */ 1.694 + i = mbx_hdrpos (stream,msgno,&j,NIL); 1.695 + d.fd = LOCAL->fd; /* set up file descriptor */ 1.696 + d.pos = i + j; 1.697 + d.chunk = LOCAL->buf; /* initial buffer chunk */ 1.698 + d.chunksize = CHUNKSIZE; 1.699 + INIT (bs,fd_string,&d,elt->rfc822_size - j); 1.700 + return LONGT; /* success */ 1.701 +} 1.702 + 1.703 +/* MBX mail modify flags 1.704 + * Accepts: MAIL stream 1.705 + * sequence 1.706 + * flag(s) 1.707 + * option flags 1.708 + * Unlocks flag lock 1.709 + */ 1.710 + 1.711 +void mbx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags) 1.712 +{ 1.713 + struct utimbuf times; 1.714 + struct stat sbuf; 1.715 + /* make sure the update takes */ 1.716 + if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld >= 0)) { 1.717 + fsync (LOCAL->fd); 1.718 + fstat (LOCAL->fd,&sbuf); /* get current write time */ 1.719 + times.modtime = LOCAL->filetime = sbuf.st_mtime; 1.720 + /* update header */ 1.721 + if ((LOCAL->ffuserflag < NUSERFLAGS) && 1.722 + stream->user_flags[LOCAL->ffuserflag]) mbx_update_header (stream); 1.723 + times.actime = time (0); /* make sure read comes after all that */ 1.724 + utime (stream->mailbox,×); 1.725 + } 1.726 + if (LOCAL->ld >= 0) { /* unlock now */ 1.727 + unlockfd (LOCAL->ld,LOCAL->lock); 1.728 + LOCAL->ld = -1; 1.729 + } 1.730 +} 1.731 + 1.732 + 1.733 +/* MBX mail per-message modify flags 1.734 + * Accepts: MAIL stream 1.735 + * message cache element 1.736 + */ 1.737 + 1.738 +void mbx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt) 1.739 +{ 1.740 + if (mbx_flaglock (stream)) mbx_update_status (stream,elt->msgno,NIL); 1.741 +} 1.742 + 1.743 +/* MBX mail ping mailbox 1.744 + * Accepts: MAIL stream 1.745 + * Returns: T if stream still alive, NIL if not 1.746 + */ 1.747 + 1.748 +long mbx_ping (MAILSTREAM *stream) 1.749 +{ 1.750 + unsigned long i,pos; 1.751 + long ret = NIL; 1.752 + int ld; 1.753 + char lock[MAILTMPLEN]; 1.754 + MESSAGECACHE *elt; 1.755 + struct stat sbuf; 1.756 + if (stream && LOCAL) { /* only if stream already open */ 1.757 + ret = LONGT; /* assume OK */ 1.758 + fstat (LOCAL->fd,&sbuf); /* get current file poop */ 1.759 + /* allow expunge if permitted at ping */ 1.760 + if (mail_parameters (NIL,GET_EXPUNGEATPING,NIL)) LOCAL->expok = T; 1.761 + /* if external modification */ 1.762 + if (LOCAL->filetime && (LOCAL->filetime < sbuf.st_mtime)) 1.763 + LOCAL->flagcheck = T; /* upgrade to flag checking */ 1.764 + /* new mail or flagcheck handling needed? */ 1.765 + if (((sbuf.st_size - LOCAL->filesize) || LOCAL->flagcheck || 1.766 + !stream->nmsgs) && 1.767 + ((ld = lockname (lock,stream->mailbox,LOCK_EX)) >= 0)) { 1.768 + if (!LOCAL->flagcheck) ret = mbx_parse (stream); 1.769 + /* sweep mailbox for changed message status */ 1.770 + else if (ret = mbx_parse (stream)) { 1.771 + unsigned long recent = 0; 1.772 + LOCAL->filetime = sbuf.st_mtime; 1.773 + for (i = 1; i <= stream->nmsgs; ) 1.774 + if (elt = mbx_elt (stream,i,LOCAL->expok)) { 1.775 + if (elt->recent) ++recent; 1.776 + ++i; 1.777 + } 1.778 + mail_recent (stream,recent); 1.779 + LOCAL->flagcheck = NIL; /* got all the updates */ 1.780 + } 1.781 + unlockfd (ld,lock); /* release shared parse/append permission */ 1.782 + } 1.783 + if (ret) { /* must still be alive */ 1.784 + if (!LOCAL->expunged) /* look for holes if none known yet */ 1.785 + for (i = 1, pos = HDRSIZE; 1.786 + !LOCAL->expunged && (i <= stream->nmsgs); 1.787 + i++, pos += elt->private.special.text.size + elt->rfc822_size) 1.788 + if ((elt = mail_elt (stream,i))->private.special.offset != pos) 1.789 + LOCAL->expunged = T;/* found a hole */ 1.790 + /* burp any holes */ 1.791 + if (LOCAL->expunged && !stream->rdonly) { 1.792 + if (mbx_rewrite (stream,&i,NIL)) fatal ("expunge on check"); 1.793 + if (i) { /* any space reclaimed? */ 1.794 + LOCAL->expunged = NIL;/* no more pending expunge */ 1.795 + sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",i); 1.796 + mm_log (LOCAL->buf,(long) NIL); 1.797 + } 1.798 + } 1.799 + LOCAL->expok = NIL; /* no more expok */ 1.800 + } 1.801 + } 1.802 + return ret; /* return result of the parse */ 1.803 +} 1.804 + 1.805 +/* MBX mail check mailbox (reparses status too) 1.806 + * Accepts: MAIL stream 1.807 + */ 1.808 + 1.809 +void mbx_check (MAILSTREAM *stream) 1.810 +{ 1.811 + if (LOCAL) LOCAL->expok = T; /* mark that a check is desired */ 1.812 + if (mbx_ping (stream)) mm_log ("Check completed",(long) NIL); 1.813 +} 1.814 + 1.815 + 1.816 +/* MBX mail expunge mailbox 1.817 + * Accepts: MAIL stream 1.818 + * sequence to expunge if non-NIL 1.819 + * expunge options 1.820 + * Returns: T if success, NIL if failure 1.821 + */ 1.822 + 1.823 +long mbx_expunge (MAILSTREAM *stream,char *sequence,long options) 1.824 +{ 1.825 + long ret; 1.826 + unsigned long nexp,reclaimed; 1.827 + if (ret = sequence ? ((options & EX_UID) ? 1.828 + mail_uid_sequence (stream,sequence) : 1.829 + mail_sequence (stream,sequence)) : LONGT) { 1.830 + if (!mbx_ping (stream)); /* do nothing if stream dead */ 1.831 + else if (stream->rdonly) /* won't do on readonly files! */ 1.832 + mm_log ("Expunge ignored on readonly mailbox",WARN); 1.833 + /* if expunged any messages */ 1.834 + else if (nexp = mbx_rewrite (stream,&reclaimed,sequence ? -1 : 1)) { 1.835 + sprintf (LOCAL->buf,"Expunged %lu messages",nexp); 1.836 + mm_log (LOCAL->buf,(long) NIL); 1.837 + } 1.838 + else if (reclaimed) { /* or if any prior expunged space reclaimed */ 1.839 + sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",reclaimed); 1.840 + mm_log (LOCAL->buf,(long) NIL); 1.841 + } 1.842 + else mm_log ("No messages deleted, so no update needed",(long) NIL); 1.843 + } 1.844 + return ret; 1.845 +} 1.846 + 1.847 +/* MBX mail copy message(s) 1.848 + * Accepts: MAIL stream 1.849 + * sequence 1.850 + * destination mailbox 1.851 + * copy options 1.852 + * Returns: T if success, NIL if failed 1.853 + */ 1.854 + 1.855 +long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options) 1.856 +{ 1.857 + struct stat sbuf; 1.858 + struct utimbuf times; 1.859 + MESSAGECACHE *elt; 1.860 + unsigned long i,j,k,m; 1.861 + long ret = LONGT; 1.862 + int fd,ld; 1.863 + char *s,*t,file[MAILTMPLEN],lock[MAILTMPLEN]; 1.864 + mailproxycopy_t pc = 1.865 + (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL); 1.866 + copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL); 1.867 + SEARCHSET *source = cu ? mail_newsearchset () : NIL; 1.868 + SEARCHSET *dest = cu ? mail_newsearchset () : NIL; 1.869 + MAILSTREAM *dstream = NIL; 1.870 + if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) : 1.871 + mail_sequence (stream,sequence))) return NIL; 1.872 + /* make sure valid mailbox */ 1.873 + if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock, 1.874 + cu ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0) 1.875 + switch (errno) { 1.876 + case ENOENT: /* no such file? */ 1.877 + mm_notify (stream,"[TRYCREATE] Must create mailbox before copy",NIL); 1.878 + return NIL; 1.879 + case EACCES: /* file protected */ 1.880 + sprintf (LOCAL->buf,"Can't access destination: %.80s",mailbox); 1.881 + MM_LOG (LOCAL->buf,ERROR); 1.882 + return NIL; 1.883 + case EINVAL: 1.884 + if (pc) return (*pc) (stream,sequence,mailbox,options); 1.885 + sprintf (LOCAL->buf,"Invalid MBX-format mailbox name: %.80s",mailbox); 1.886 + mm_log (LOCAL->buf,ERROR); 1.887 + return NIL; 1.888 + default: 1.889 + if (pc) return (*pc) (stream,sequence,mailbox,options); 1.890 + sprintf (LOCAL->buf,"Not a MBX-format mailbox: %.80s",mailbox); 1.891 + mm_log (LOCAL->buf,ERROR); 1.892 + return NIL; 1.893 + } 1.894 + /* got file? */ 1.895 + if ((fd = open (dummy_file (file,mailbox),O_RDWR|O_CREAT|O_BINARY, 1.896 + S_IREAD|S_IWRITE)) < 0) { 1.897 + sprintf (LOCAL->buf,"Unable to open copy mailbox: %s",strerror (errno)); 1.898 + mm_log (LOCAL->buf,ERROR); 1.899 + return NIL; 1.900 + } 1.901 + mm_critical (stream); /* go critical */ 1.902 + fstat (fd,&sbuf); /* get current file size */ 1.903 + lseek (fd,sbuf.st_size,L_SET);/* move to end of file */ 1.904 + 1.905 + /* for each requested message */ 1.906 + for (i = 1; ret && (i <= stream->nmsgs); i++) 1.907 + if ((elt = mail_elt (stream,i))->sequence) { 1.908 + lseek (LOCAL->fd,elt->private.special.offset + 1.909 + elt->private.special.text.size,L_SET); 1.910 + mail_date(LOCAL->buf,elt);/* build target header */ 1.911 + /* get target keyword mask */ 1.912 + for (j = elt->user_flags, k = 0; j; ) 1.913 + if (s = stream->user_flags[find_rightmost_bit (&j)]) 1.914 + for (m = 0; (m < NUSERFLAGS) && (t = dstream->user_flags[m]); m++) 1.915 + if (!compare_cstring (s,t) && (k |= 1 << m)) break; 1.916 + sprintf (LOCAL->buf+strlen(LOCAL->buf),",%lu;%08lx%04x-%08lx\015\012", 1.917 + elt->rfc822_size,k,(unsigned) 1.918 + ((fSEEN * elt->seen) + (fDELETED * elt->deleted) + 1.919 + (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) + 1.920 + (fDRAFT * elt->draft)),cu ? ++dstream->uid_last : 0); 1.921 + /* write target header */ 1.922 + if (ret = (write (fd,LOCAL->buf,strlen (LOCAL->buf)) > 0)) { 1.923 + for (k = elt->rfc822_size; ret && (j = min (k,LOCAL->buflen)); k -= j){ 1.924 + read (LOCAL->fd,LOCAL->buf,j); 1.925 + ret = write (fd,LOCAL->buf,j) >= 0; 1.926 + } 1.927 + if (cu) { /* need to pass back new UID? */ 1.928 + mail_append_set (source,mail_uid (stream,i)); 1.929 + mail_append_set (dest,dstream->uid_last); 1.930 + } 1.931 + } 1.932 + } 1.933 + 1.934 + /* make sure all the updates take */ 1.935 + if (!(ret && (ret = !fsync (fd)))) { 1.936 + sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno)); 1.937 + mm_log (LOCAL->buf,ERROR); 1.938 + ftruncate (fd,sbuf.st_size); 1.939 + } 1.940 + if (cu && ret) { /* return sets if doing COPYUID */ 1.941 + (*cu) (stream,mailbox,dstream->uid_validity,source,dest); 1.942 + lseek (fd,15,L_SET); /* update UIDLAST */ 1.943 + sprintf (LOCAL->buf,"%08lx",dstream->uid_last); 1.944 + write (fd,LOCAL->buf,8); 1.945 + } 1.946 + else { /* flush any sets we may have built */ 1.947 + mail_free_searchset (&source); 1.948 + mail_free_searchset (&dest); 1.949 + } 1.950 + /* set atime to now-1 if successful copy */ 1.951 + if (ret) times.actime = time (0) - 1; 1.952 + /* else preserved \Marked status */ 1.953 + else times.actime = (sbuf.st_ctime > sbuf.st_atime) ? 1.954 + sbuf.st_atime : time (0); 1.955 + times.modtime = sbuf.st_mtime;/* preserve mtime */ 1.956 + utime (file,×); /* set the times */ 1.957 + close (fd); /* close the file */ 1.958 + mm_nocritical (stream); /* release critical */ 1.959 + unlockfd (ld,lock); /* release exclusive parse/append permission */ 1.960 + /* delete all requested messages */ 1.961 + if (ret && (options & CP_MOVE) && mbx_flaglock (stream)) { 1.962 + for (i = 1; i <= stream->nmsgs; i++) if (mail_elt (stream,i)->sequence) { 1.963 + /* mark message deleted */ 1.964 + mbx_elt (stream,i,NIL)->deleted = T; 1.965 + /* recalculate status */ 1.966 + mbx_update_status (stream,i,NIL); 1.967 + } 1.968 + /* update flags */ 1.969 + mbx_flag (stream,NIL,NIL,NIL); 1.970 + } 1.971 + if (dstream != stream) mail_close (dstream); 1.972 + return ret; 1.973 +} 1.974 + 1.975 +/* MBX mail append message from stringstruct 1.976 + * Accepts: MAIL stream 1.977 + * destination mailbox 1.978 + * append callback 1.979 + * data for callback 1.980 + * Returns: T if append successful, else NIL 1.981 + */ 1.982 + 1.983 +long mbx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data) 1.984 +{ 1.985 + struct stat sbuf; 1.986 + int fd,ld; 1.987 + char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN]; 1.988 + struct utimbuf times; 1.989 + FILE *df; 1.990 + MESSAGECACHE elt; 1.991 + long f; 1.992 + unsigned long i,uf; 1.993 + STRING *message; 1.994 + long ret = NIL; 1.995 + MAILSTREAM *dstream = NIL; 1.996 + appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL); 1.997 + SEARCHSET *dst = au ? mail_newsearchset () : NIL; 1.998 + /* make sure valid mailbox */ 1.999 + /* make sure valid mailbox */ 1.1000 + if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock, 1.1001 + au ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0) 1.1002 + switch (errno) { 1.1003 + case ENOENT: /* no such file? */ 1.1004 + if (compare_cstring (mailbox,"INBOX")) { 1.1005 + mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL); 1.1006 + return NIL; 1.1007 + } 1.1008 + /* can create INBOX here */ 1.1009 + mbx_create (dstream = stream ? stream : &mbxproto,"INBOX"); 1.1010 + if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock, 1.1011 + au ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0) 1.1012 + break; 1.1013 + case EACCES: /* file protected */ 1.1014 + sprintf (tmp,"Can't access destination: %.80s",mailbox); 1.1015 + MM_LOG (tmp,ERROR); 1.1016 + return NIL; 1.1017 + case EINVAL: 1.1018 + sprintf (tmp,"Invalid MBX-format mailbox name: %.80s",mailbox); 1.1019 + mm_log (tmp,ERROR); 1.1020 + return NIL; 1.1021 + default: 1.1022 + sprintf (tmp,"Not a MBX-format mailbox: %.80s",mailbox); 1.1023 + mm_log (tmp,ERROR); 1.1024 + return NIL; 1.1025 + } 1.1026 + 1.1027 + /* get first message */ 1.1028 + if (!(*af) (dstream,data,&flags,&date,&message)) close (fd); 1.1029 + else if (!(df = fdopen (fd,"r+b"))) { 1.1030 + MM_LOG ("Unable to reopen append mailbox",ERROR); 1.1031 + close (fd); 1.1032 + } 1.1033 + else { 1.1034 + mm_critical (dstream); /* go critical */ 1.1035 + fstat (fd,&sbuf); /* get current file size */ 1.1036 + fseek (df,sbuf.st_size,SEEK_SET); 1.1037 + errno = 0; 1.1038 + for (ret = LONGT; ret && message; ) { 1.1039 + if (!SIZE (message)) { /* guard against zero-length */ 1.1040 + mm_log ("Append of zero-length message",ERROR); 1.1041 + ret = NIL; 1.1042 + break; 1.1043 + } 1.1044 + f = mail_parse_flags (dstream,flags,&uf); 1.1045 + if (date) { /* parse date if given */ 1.1046 + if (!mail_parse_date (&elt,date)) { 1.1047 + sprintf (tmp,"Bad date in append: %.80s",date); 1.1048 + mm_log (tmp,ERROR); 1.1049 + ret = NIL; /* mark failure */ 1.1050 + break; 1.1051 + } 1.1052 + mail_date (tmp,&elt); /* write preseved date */ 1.1053 + } 1.1054 + else internal_date (tmp); /* get current date in IMAP format */ 1.1055 + /* write header */ 1.1056 + if (fprintf (df,"%s,%lu;%08lx%04lx-%08lx\015\012",tmp,i = SIZE (message), 1.1057 + uf,(unsigned long) f,au ? ++dstream->uid_last : 0) < 0) 1.1058 + ret = NIL; 1.1059 + else { /* write message */ 1.1060 + size_t j; 1.1061 + if (!message->cursize) SETPOS (message,GETPOS (message)); 1.1062 + while (i && (j = fwrite (message->curpos,1,message->cursize,df))) { 1.1063 + i -= j; 1.1064 + SETPOS (message,GETPOS (message) + j); 1.1065 + } 1.1066 + /* get next message */ 1.1067 + if (i || !(*af) (dstream,data,&flags,&date,&message)) ret = NIL; 1.1068 + else if (au) mail_append_set (dst,dstream->uid_last); 1.1069 + } 1.1070 + } 1.1071 + 1.1072 + /* if error... */ 1.1073 + if (!ret || (fflush (df) == EOF)) { 1.1074 + /* revert file */ 1.1075 + ftruncate (fd,sbuf.st_size); 1.1076 + close (fd); /* make sure fclose() doesn't corrupt us */ 1.1077 + if (errno) { 1.1078 + sprintf (tmp,"Message append failed: %s",strerror (errno)); 1.1079 + mm_log (tmp,ERROR); 1.1080 + } 1.1081 + ret = NIL; 1.1082 + } 1.1083 + if (au && ret) { /* return sets if doing APPENDUID */ 1.1084 + (*au) (mailbox,dstream->uid_validity,dst); 1.1085 + fseek (df,15,SEEK_SET); /* update UIDLAST */ 1.1086 + fprintf (df,"%08lx",dstream->uid_last); 1.1087 + } 1.1088 + else mail_free_searchset (&dst); 1.1089 + if (ret) times.actime = time (0) - 1; 1.1090 + /* else preserve \Marked status */ 1.1091 + else times.actime = (sbuf.st_ctime > sbuf.st_atime) ? 1.1092 + sbuf.st_atime : time (0); 1.1093 + /* preserve mtime */ 1.1094 + times.modtime = sbuf.st_mtime; 1.1095 + utime (file,×); /* set the times */ 1.1096 + fclose (df); /* close the file */ 1.1097 + mm_nocritical (dstream); /* release critical */ 1.1098 + } 1.1099 + unlockfd (ld,lock); /* release exclusive parse/append permission */ 1.1100 + if (dstream != stream) mail_close (dstream); 1.1101 + return ret; 1.1102 +} 1.1103 + 1.1104 +/* Internal routines */ 1.1105 + 1.1106 + 1.1107 +/* MBX mail parse mailbox 1.1108 + * Accepts: MAIL stream 1.1109 + * Returns: T if parse OK 1.1110 + * NIL if failure, stream aborted 1.1111 + */ 1.1112 + 1.1113 +long mbx_parse (MAILSTREAM *stream) 1.1114 +{ 1.1115 + struct stat sbuf; 1.1116 + MESSAGECACHE *elt = NIL; 1.1117 + unsigned char c,*s,*t,*x; 1.1118 + char tmp[MAILTMPLEN]; 1.1119 + unsigned long i,j,k,m; 1.1120 + off_t curpos = LOCAL->filesize; 1.1121 + unsigned long nmsgs = stream->nmsgs; 1.1122 + unsigned long recent = stream->recent; 1.1123 + unsigned long lastuid = 0; 1.1124 + short dirty = NIL; 1.1125 + short added = NIL; 1.1126 + short silent = stream->silent; 1.1127 + short uidwarn = T; 1.1128 + fstat (LOCAL->fd,&sbuf); /* get status */ 1.1129 + if (sbuf.st_size < curpos) { /* sanity check */ 1.1130 + sprintf (tmp,"Mailbox shrank from %lu to %lu!", 1.1131 + (unsigned long) curpos,(unsigned long) sbuf.st_size); 1.1132 + mm_log (tmp,ERROR); 1.1133 + mbx_abort (stream); 1.1134 + return NIL; 1.1135 + } 1.1136 + lseek (LOCAL->fd,0,L_SET); /* rewind file */ 1.1137 + /* read internal header */ 1.1138 + read (LOCAL->fd,LOCAL->buf,HDRSIZE); 1.1139 + LOCAL->buf[HDRSIZE] = '\0'; /* tie off header */ 1.1140 + c = LOCAL->buf[15]; /* save first character of last UID */ 1.1141 + LOCAL->buf[15] = '\0'; 1.1142 + /* parse UID validity */ 1.1143 + stream->uid_validity = strtoul (LOCAL->buf + 7,NIL,16); 1.1144 + LOCAL->buf[15] = c; /* restore first character of last UID */ 1.1145 + /* parse last UID */ 1.1146 + i = strtoul (LOCAL->buf + 15,NIL,16); 1.1147 + stream->uid_last = stream->rdonly ? max (i,stream->uid_last) : i; 1.1148 + /* parse user flags */ 1.1149 + for (i = 0, s = LOCAL->buf + 25; 1.1150 + (i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s); 1.1151 + i++, s = t + 2) { 1.1152 + *t = '\0'; /* tie off flag */ 1.1153 + if (!stream->user_flags[i] && (strlen (s) <= MAXUSERFLAG)) 1.1154 + stream->user_flags[i] = cpystr (s); 1.1155 + } 1.1156 + LOCAL->ffuserflag = (int) i; /* first free user flag */ 1.1157 + 1.1158 + stream->silent = T; /* don't pass up mm_exists() events yet */ 1.1159 + while (sbuf.st_size - curpos){/* while there is stuff to parse */ 1.1160 + /* get to that position in the file */ 1.1161 + lseek (LOCAL->fd,curpos,L_SET); 1.1162 + if ((i = read (LOCAL->fd,LOCAL->buf,64)) <= 0) { 1.1163 + sprintf (tmp,"Unable to read internal header at %lu, size = %lu: %s", 1.1164 + (unsigned long) curpos,(unsigned long) sbuf.st_size, 1.1165 + i ? strerror (errno) : "no data read"); 1.1166 + mm_log (tmp,ERROR); 1.1167 + mbx_abort (stream); 1.1168 + return NIL; 1.1169 + } 1.1170 + LOCAL->buf[i] = '\0'; /* tie off buffer just in case */ 1.1171 + if (!((s = strchr (LOCAL->buf,'\015')) && (s[1] == '\012'))) { 1.1172 + sprintf (tmp,"Unable to find CRLF at %lu in %lu bytes, text: %.80s", 1.1173 + (unsigned long) curpos,i,(char *) LOCAL->buf); 1.1174 + mm_log (tmp,ERROR); 1.1175 + mbx_abort (stream); 1.1176 + return NIL; 1.1177 + } 1.1178 + *s = '\0'; /* tie off header line */ 1.1179 + i = (s + 2) - LOCAL->buf; /* note start of text offset */ 1.1180 + if (!((s = strchr (LOCAL->buf,',')) && (t = strchr (s+1,';')))) { 1.1181 + sprintf (tmp,"Unable to parse internal header at %lu: %.80s", 1.1182 + (unsigned long) curpos,(char *) LOCAL->buf); 1.1183 + mm_log (tmp,ERROR); 1.1184 + mbx_abort (stream); 1.1185 + return NIL; 1.1186 + } 1.1187 + if (!(isxdigit (t[1]) && isxdigit (t[2]) && isxdigit (t[3]) && 1.1188 + isxdigit (t[4]) && isxdigit (t[5]) && isxdigit (t[6]) && 1.1189 + isxdigit (t[7]) && isxdigit (t[8]) && isxdigit (t[9]) && 1.1190 + isxdigit (t[10]) && isxdigit (t[11]) && isxdigit (t[12]))) { 1.1191 + sprintf (tmp,"Unable to parse message flags at %lu: %.80s", 1.1192 + (unsigned long) curpos,(char *) LOCAL->buf); 1.1193 + mm_log (tmp,ERROR); 1.1194 + mbx_abort (stream); 1.1195 + return NIL; 1.1196 + } 1.1197 + if ((t[13] != '-') || t[22] || 1.1198 + !(isxdigit (t[14]) && isxdigit (t[15]) && isxdigit (t[16]) && 1.1199 + isxdigit (t[17]) && isxdigit (t[18]) && isxdigit (t[19]) && 1.1200 + isxdigit (t[20]) && isxdigit (t[21]))) { 1.1201 + sprintf (tmp,"Unable to parse message UID at %lu: %.80s", 1.1202 + (unsigned long) curpos,(char *) LOCAL->buf); 1.1203 + mm_log (tmp,ERROR); 1.1204 + mbx_abort (stream); 1.1205 + return NIL; 1.1206 + } 1.1207 + 1.1208 + *s++ = '\0'; *t++ = '\0'; /* break up fields */ 1.1209 + /* get message size */ 1.1210 + if (!(j = strtoul (s,(char **) &x,10)) && (!(x && *x))) { 1.1211 + sprintf (tmp,"Unable to parse message size at %lu: %.80s,%.80s;%.80s", 1.1212 + (unsigned long) curpos,(char *) LOCAL->buf,(char *) s, 1.1213 + (char *) t); 1.1214 + mm_log (tmp,ERROR); 1.1215 + mbx_abort (stream); 1.1216 + return NIL; 1.1217 + } 1.1218 + /* make sure didn't run off end of file */ 1.1219 + if (((off_t) (curpos + i + j)) > sbuf.st_size) { 1.1220 + sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)", 1.1221 + (unsigned long) curpos,(unsigned long) (curpos + i + j), 1.1222 + (unsigned long) sbuf.st_size); 1.1223 + mm_log (tmp,ERROR); 1.1224 + mbx_abort (stream); 1.1225 + return NIL; 1.1226 + } 1.1227 + /* parse UID */ 1.1228 + if ((m = strtoul (t+13,NIL,16)) && 1.1229 + ((m <= lastuid) || (m > stream->uid_last))) { 1.1230 + if (uidwarn) { 1.1231 + sprintf (tmp,"Invalid UID %08lx in message %lu, rebuilding UIDs", 1.1232 + m,nmsgs+1); 1.1233 + mm_log (tmp,WARN); 1.1234 + uidwarn = NIL; 1.1235 + /* restart UID validity */ 1.1236 + stream->uid_validity = (unsigned long) time (0); 1.1237 + } 1.1238 + m = 0; /* lose this UID */ 1.1239 + dirty = T; /* mark dirty, set new lastuid */ 1.1240 + stream->uid_last = lastuid; 1.1241 + } 1.1242 + 1.1243 + t[12] = '\0'; /* parse system flags */ 1.1244 + if ((k = strtoul (t+8,NIL,16)) & fEXPUNGED) { 1.1245 + if (m) lastuid = m; /* expunge message, update last UID seen */ 1.1246 + else { /* no UID assigned? */ 1.1247 + lastuid = ++stream->uid_last; 1.1248 + dirty = T; 1.1249 + } 1.1250 + } 1.1251 + else { /* not expunged, swell the cache */ 1.1252 + added = T; /* note that a new message was added */ 1.1253 + mail_exists (stream,++nmsgs); 1.1254 + /* instantiate an elt for this message */ 1.1255 + (elt = mail_elt (stream,nmsgs))->valid = T; 1.1256 + /* parse the date */ 1.1257 + if (!mail_parse_date (elt,LOCAL->buf)) { 1.1258 + sprintf (tmp,"Unable to parse message date at %lu: %.80s", 1.1259 + (unsigned long) curpos,(char *) LOCAL->buf); 1.1260 + mm_log (tmp,ERROR); 1.1261 + mbx_abort (stream); 1.1262 + return NIL; 1.1263 + } 1.1264 + /* note file offset of header */ 1.1265 + elt->private.special.offset = curpos; 1.1266 + /* and internal header size */ 1.1267 + elt->private.special.text.size = i; 1.1268 + /* header size not known yet */ 1.1269 + elt->private.msg.header.text.size = 0; 1.1270 + elt->rfc822_size = j; /* note message size */ 1.1271 + /* calculate system flags */ 1.1272 + if (k & fSEEN) elt->seen = T; 1.1273 + if (k & fDELETED) elt->deleted = T; 1.1274 + if (k & fFLAGGED) elt->flagged = T; 1.1275 + if (k & fANSWERED) elt->answered = T; 1.1276 + if (k & fDRAFT) elt->draft = T; 1.1277 + t[8] = '\0'; /* get user flags value */ 1.1278 + elt->user_flags = strtoul (t,NIL,16); 1.1279 + /* UID already assigned? */ 1.1280 + if (!(elt->private.uid = m) || !(k & fOLD)) { 1.1281 + elt->recent = T; /* no, mark as recent */ 1.1282 + ++recent; /* count up a new recent message */ 1.1283 + dirty = T; /* and must rewrite header */ 1.1284 + /* assign new UID */ 1.1285 + if (!elt->private.uid) elt->private.uid = ++stream->uid_last; 1.1286 + mbx_update_status (stream,elt->msgno,NIL); 1.1287 + } 1.1288 + /* update last parsed UID */ 1.1289 + lastuid = elt->private.uid; 1.1290 + } 1.1291 + curpos += i + j; /* update position */ 1.1292 + } 1.1293 + 1.1294 + if (dirty && !stream->rdonly){/* update header */ 1.1295 + mbx_update_header (stream); 1.1296 + fsync (LOCAL->fd); /* make sure all the UID updates take */ 1.1297 + } 1.1298 + /* update parsed file size and time */ 1.1299 + LOCAL->filesize = sbuf.st_size; 1.1300 + fstat (LOCAL->fd,&sbuf); /* get status again to ensure time is right */ 1.1301 + LOCAL->filetime = sbuf.st_mtime; 1.1302 + if (added && !stream->rdonly){/* make sure atime updated */ 1.1303 + struct utimbuf times; 1.1304 + times.actime = time (0); 1.1305 + times.modtime = LOCAL->filetime; 1.1306 + utime (stream->mailbox,×); 1.1307 + } 1.1308 + stream->silent = silent; /* can pass up events now */ 1.1309 + mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */ 1.1310 + mail_recent (stream,recent); /* and of change in recent messages */ 1.1311 + return LONGT; /* return the winnage */ 1.1312 +} 1.1313 + 1.1314 +/* MBX get cache element with status updating from file 1.1315 + * Accepts: MAIL stream 1.1316 + * message number 1.1317 + * expunge OK flag 1.1318 + * Returns: cache element 1.1319 + */ 1.1320 + 1.1321 +MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno,long expok) 1.1322 +{ 1.1323 + MESSAGECACHE *elt = mail_elt (stream,msgno); 1.1324 + struct { /* old flags */ 1.1325 + unsigned int seen : 1; 1.1326 + unsigned int deleted : 1; 1.1327 + unsigned int flagged : 1; 1.1328 + unsigned int answered : 1; 1.1329 + unsigned int draft : 1; 1.1330 + unsigned long user_flags; 1.1331 + } old; 1.1332 + old.seen = elt->seen; old.deleted = elt->deleted; old.flagged = elt->flagged; 1.1333 + old.answered = elt->answered; old.draft = elt->draft; 1.1334 + old.user_flags = elt->user_flags; 1.1335 + /* get new flags */ 1.1336 + if (mbx_read_flags (stream,elt) && expok) { 1.1337 + mail_expunged (stream,elt->msgno); 1.1338 + return NIL; /* return this message was expunged */ 1.1339 + } 1.1340 + if ((old.seen != elt->seen) || (old.deleted != elt->deleted) || 1.1341 + (old.flagged != elt->flagged) || (old.answered != elt->answered) || 1.1342 + (old.draft != elt->draft) || (old.user_flags != elt->user_flags)) 1.1343 + mm_flags (stream,msgno); /* let top level know */ 1.1344 + return elt; 1.1345 +} 1.1346 + 1.1347 +/* MBX read flags from file 1.1348 + * Accepts: MAIL stream 1.1349 + * cache element 1.1350 + * Returns: non-NIL if message expunged 1.1351 + */ 1.1352 + 1.1353 +unsigned long mbx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt) 1.1354 +{ 1.1355 + unsigned long i; 1.1356 + struct stat sbuf; 1.1357 + fstat (LOCAL->fd,&sbuf); /* get status */ 1.1358 + /* make sure file size is good */ 1.1359 + if (sbuf.st_size < LOCAL->filesize) { 1.1360 + sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag read!", 1.1361 + (unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size); 1.1362 + fatal (LOCAL->buf); 1.1363 + } 1.1364 + /* set the seek pointer */ 1.1365 + lseek (LOCAL->fd,(off_t) elt->private.special.offset + 1.1366 + elt->private.special.text.size - 24,L_SET); 1.1367 + /* read the new flags */ 1.1368 + if (read (LOCAL->fd,LOCAL->buf,14) < 0) { 1.1369 + sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno)); 1.1370 + fatal (LOCAL->buf); 1.1371 + } 1.1372 + if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) { 1.1373 + LOCAL->buf[14] = '\0'; /* tie off buffer for error message */ 1.1374 + sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s", 1.1375 + elt->msgno,elt->private.special.offset, 1.1376 + elt->private.special.text.size,(char *) LOCAL->buf); 1.1377 + fatal (LOCAL->buf+50); 1.1378 + } 1.1379 + LOCAL->buf[13] = '\0'; /* tie off buffer */ 1.1380 + /* calculate system flags */ 1.1381 + i = strtoul (LOCAL->buf+9,NIL,16); 1.1382 + elt->seen = i & fSEEN ? T : NIL; 1.1383 + elt->deleted = i & fDELETED ? T : NIL; 1.1384 + elt->flagged = i & fFLAGGED ? T : NIL; 1.1385 + elt->answered = i & fANSWERED ? T : NIL; 1.1386 + elt->draft = i & fDRAFT ? T : NIL; 1.1387 + LOCAL->expunged |= i & fEXPUNGED ? T : NIL; 1.1388 + LOCAL->buf[9] = '\0'; /* tie off flags */ 1.1389 + /* get user flags value */ 1.1390 + elt->user_flags = strtoul (LOCAL->buf+1,NIL,16); 1.1391 + elt->valid = T; /* have valid flags now */ 1.1392 + return i & fEXPUNGED; 1.1393 +} 1.1394 + 1.1395 +/* MBX update header 1.1396 + * Accepts: MAIL stream 1.1397 + */ 1.1398 + 1.1399 +#define NTKLUDGEOFFSET 7 1.1400 + 1.1401 +void mbx_update_header (MAILSTREAM *stream) 1.1402 +{ 1.1403 + int i; 1.1404 + char *s = LOCAL->buf; 1.1405 + memset (s,'\0',HDRSIZE); /* initialize header */ 1.1406 + sprintf (s,"*mbx*\015\012%08lx%08lx\015\012", 1.1407 + stream->uid_validity,stream->uid_last); 1.1408 + for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; ++i) 1.1409 + sprintf (s += strlen (s),"%s\015\012",stream->user_flags[i]); 1.1410 + LOCAL->ffuserflag = i; /* first free user flag */ 1.1411 + /* can we create more user flags? */ 1.1412 + stream->kwd_create = (i < NUSERFLAGS) ? T : NIL; 1.1413 + /* write reserved lines */ 1.1414 + while (i++ < NUSERFLAGS) strcat (s,"\015\012"); 1.1415 + while (T) { /* rewind file */ 1.1416 + lseek (LOCAL->fd,NTKLUDGEOFFSET,L_SET); 1.1417 + /* write new header */ 1.1418 + if (write (LOCAL->fd,LOCAL->buf + NTKLUDGEOFFSET, 1.1419 + HDRSIZE - NTKLUDGEOFFSET) > 0) break; 1.1420 + mm_notify (stream,strerror (errno),WARN); 1.1421 + mm_diskerror (stream,errno,T); 1.1422 + } 1.1423 +} 1.1424 + 1.1425 +/* MBX update status string 1.1426 + * Accepts: MAIL stream 1.1427 + * message number 1.1428 + * flags 1.1429 + */ 1.1430 + 1.1431 +void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags) 1.1432 +{ 1.1433 + struct stat sbuf; 1.1434 + MESSAGECACHE *elt = mail_elt (stream,msgno); 1.1435 + /* readonly */ 1.1436 + if (stream->rdonly || !elt->valid) mbx_read_flags (stream,elt); 1.1437 + else { /* readwrite */ 1.1438 + fstat (LOCAL->fd,&sbuf); /* get status */ 1.1439 + /* make sure file size is good */ 1.1440 + if (sbuf.st_size < LOCAL->filesize) { 1.1441 + sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag update!", 1.1442 + (unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size); 1.1443 + fatal (LOCAL->buf); 1.1444 + } 1.1445 + /* set the seek pointer */ 1.1446 + lseek (LOCAL->fd,(off_t) elt->private.special.offset + 1.1447 + elt->private.special.text.size - 24,L_SET); 1.1448 + /* read the new flags */ 1.1449 + if (read (LOCAL->fd,LOCAL->buf,14) < 0) { 1.1450 + sprintf (LOCAL->buf,"Unable to read old status: %s",strerror (errno)); 1.1451 + fatal (LOCAL->buf); 1.1452 + } 1.1453 + if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) { 1.1454 + LOCAL->buf[14] = '\0'; /* tie off buffer for error message */ 1.1455 + sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s", 1.1456 + elt->msgno,elt->private.special.offset, 1.1457 + elt->private.special.text.size,(char *) LOCAL->buf); 1.1458 + fatal (LOCAL->buf+50); 1.1459 + } 1.1460 + /* print new flag string */ 1.1461 + sprintf (LOCAL->buf,"%08lx%04x-%08lx",elt->user_flags,(unsigned) 1.1462 + (((elt->deleted && flags) ? 1.1463 + fEXPUNGED : (strtoul (LOCAL->buf+9,NIL,16)) & fEXPUNGED) + 1.1464 + (fSEEN * elt->seen) + (fDELETED * elt->deleted) + 1.1465 + (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) + 1.1466 + (fDRAFT * elt->draft) + fOLD),elt->private.uid); 1.1467 + while (T) { /* get to that place in the file */ 1.1468 + lseek (LOCAL->fd,(off_t) elt->private.special.offset + 1.1469 + elt->private.special.text.size - 23,L_SET); 1.1470 + /* write new flags and UID */ 1.1471 + if (write (LOCAL->fd,LOCAL->buf,21) > 0) break; 1.1472 + mm_notify (stream,strerror (errno),WARN); 1.1473 + mm_diskerror (stream,errno,T); 1.1474 + } 1.1475 + } 1.1476 +} 1.1477 + 1.1478 +/* MBX locate header for a message 1.1479 + * Accepts: MAIL stream 1.1480 + * message number 1.1481 + * pointer to returned header size 1.1482 + * pointer to possible returned header 1.1483 + * Returns: position of header in file 1.1484 + */ 1.1485 + 1.1486 +#define HDRBUFLEN 16384 /* good enough for most headers */ 1.1487 +#define SLOP 4 /* CR LF CR LF */ 1.1488 + 1.1489 +unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno, 1.1490 + unsigned long *size,char **hdr) 1.1491 +{ 1.1492 + unsigned long siz,done; 1.1493 + long i; 1.1494 + unsigned char *s,*t,*te; 1.1495 + MESSAGECACHE *elt = mail_elt (stream,msgno); 1.1496 + unsigned long ret = elt->private.special.offset + 1.1497 + elt->private.special.text.size; 1.1498 + if (hdr) *hdr = NIL; /* assume no header returned */ 1.1499 + /* is header size known? */ 1.1500 + if (*size = elt->private.msg.header.text.size) return ret; 1.1501 + /* paranoia check */ 1.1502 + if (LOCAL->buflen < (HDRBUFLEN + SLOP)) 1.1503 + fatal ("LOCAL->buf smaller than HDRBUFLEN"); 1.1504 + lseek (LOCAL->fd,ret,L_SET); /* get to header position */ 1.1505 + /* read HDRBUFLEN chunks with 4 byte slop */ 1.1506 + for (done = siz = 0, s = LOCAL->buf; 1.1507 + (i = min ((long) (elt->rfc822_size - done),(long) HDRBUFLEN)) && 1.1508 + (read (LOCAL->fd,s,i) == i); 1.1509 + done += i, siz += (t - LOCAL->buf) - SLOP, s = LOCAL->buf + SLOP) { 1.1510 + te = (t = s + i) - 12; /* calculate end of fast scan */ 1.1511 + /* fast scan for CR */ 1.1512 + for (s = LOCAL->buf; s < te;) 1.1513 + if (((*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') || 1.1514 + (*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') || 1.1515 + (*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') || 1.1516 + (*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015')) && 1.1517 + (*s == '\012') && (*++s == '\015') && (*++s == '\012')) { 1.1518 + *size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf); 1.1519 + if (hdr) *hdr = LOCAL->buf; 1.1520 + return ret; 1.1521 + } 1.1522 + for (te = t - 3; (s < te);) /* final character-at-a-time scan */ 1.1523 + if ((*s++ == '\015') && (*s == '\012') && (*++s == '\015') && 1.1524 + (*++s == '\012')) { 1.1525 + *size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf); 1.1526 + if (hdr) *hdr = LOCAL->buf; 1.1527 + return ret; 1.1528 + } 1.1529 + if (i <= SLOP) break; /* end of data */ 1.1530 + /* slide over last 4 bytes */ 1.1531 + memmove (LOCAL->buf,t - SLOP,SLOP); 1.1532 + hdr = NIL; /* can't return header this way */ 1.1533 + } 1.1534 + /* not found: header consumes entire message */ 1.1535 + elt->private.msg.header.text.size = *size = elt->rfc822_size; 1.1536 + if (hdr) *hdr = LOCAL->buf; /* possibly return header too */ 1.1537 + return ret; 1.1538 +} 1.1539 + 1.1540 +/* MBX mail rewrite mailbox 1.1541 + * Accepts: MAIL stream 1.1542 + * pointer to return reclaimed size 1.1543 + * flags (0 = no expunge, 1 = expunge deleted, -1 = expunge sequence) 1.1544 + * Returns: number of expunged messages 1.1545 + */ 1.1546 + 1.1547 +unsigned long mbx_rewrite (MAILSTREAM *stream,unsigned long *reclaimed, 1.1548 + long flags) 1.1549 +{ 1.1550 + struct utimbuf times; 1.1551 + struct stat sbuf; 1.1552 + off_t pos,ppos; 1.1553 + int ld; 1.1554 + unsigned long i,j,k,m,delta; 1.1555 + unsigned long n = *reclaimed = 0; 1.1556 + unsigned long recent = 0; 1.1557 + char lock[MAILTMPLEN]; 1.1558 + MESSAGECACHE *elt; 1.1559 + /* get parse/append permission */ 1.1560 + if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0) { 1.1561 + mm_log ("Unable to lock expunge mailbox",ERROR); 1.1562 + return 0; 1.1563 + } 1.1564 + fstat (LOCAL->fd,&sbuf); /* get current write time */ 1.1565 + if (LOCAL->filetime && !LOCAL->flagcheck && 1.1566 + (LOCAL->filetime < sbuf.st_mtime)) LOCAL->flagcheck = T; 1.1567 + if (!mbx_parse (stream)) { /* make sure see any newly-arrived messages */ 1.1568 + unlockfd (ld,lock); /* failed?? */ 1.1569 + return 0; 1.1570 + } 1.1571 + if (LOCAL->flagcheck) { /* sweep flags if need flagcheck */ 1.1572 + LOCAL->filetime = sbuf.st_mtime; 1.1573 + for (i = 1; i <= stream->nmsgs; ++i) mbx_elt (stream,i,NIL); 1.1574 + LOCAL->flagcheck = NIL; 1.1575 + } 1.1576 + 1.1577 + /* get exclusive access */ 1.1578 + if (!flock (LOCAL->fd,LOCK_EX|LOCK_NB)) { 1.1579 + mm_critical (stream); /* go critical */ 1.1580 + for (i = 1,delta = 0,pos = ppos = HDRSIZE; i <= stream->nmsgs; ) { 1.1581 + /* note if message not at predicted location */ 1.1582 + if (m = (elt = mbx_elt (stream,i,NIL))->private.special.offset - ppos) { 1.1583 + ppos = elt->private.special.offset; 1.1584 + *reclaimed += m; /* note reclaimed message space */ 1.1585 + delta += m; /* and as expunge delta */ 1.1586 + } 1.1587 + /* number of bytes to smash or preserve */ 1.1588 + ppos += (k = elt->private.special.text.size + elt->rfc822_size); 1.1589 + /* if need to expunge this message*/ 1.1590 + if (flags && elt->deleted && ((flags > 0) || elt->sequence)) { 1.1591 + delta += k; /* number of bytes to delete */ 1.1592 + mail_expunged(stream,i);/* notify upper levels */ 1.1593 + n++; /* count up one more expunged message */ 1.1594 + } 1.1595 + else { /* preserved message */ 1.1596 + i++; /* count this message */ 1.1597 + if (elt->recent) ++recent; 1.1598 + if (delta) { /* moved, note first byte to preserve */ 1.1599 + j = elt->private.special.offset; 1.1600 + do { /* read from source position */ 1.1601 + m = min (k,LOCAL->buflen); 1.1602 + lseek (LOCAL->fd,j,L_SET); 1.1603 + read (LOCAL->fd,LOCAL->buf,m); 1.1604 + pos = j - delta; /* write to destination position */ 1.1605 + while (T) { 1.1606 + lseek (LOCAL->fd,pos,L_SET); 1.1607 + if (write (LOCAL->fd,LOCAL->buf,m) > 0) break; 1.1608 + mm_notify (stream,strerror (errno),WARN); 1.1609 + mm_diskerror (stream,errno,T); 1.1610 + } 1.1611 + pos += m; /* new position */ 1.1612 + j += m; /* next chunk, perhaps */ 1.1613 + } while (k -= m); /* until done */ 1.1614 + /* note the new address of this text */ 1.1615 + elt->private.special.offset -= delta; 1.1616 + } 1.1617 + /* preserved but no deleted messages yet */ 1.1618 + else pos = elt->private.special.offset + k; 1.1619 + } 1.1620 + } 1.1621 + /* deltaed file size match position? */ 1.1622 + if (m = (LOCAL->filesize -= delta) - pos) { 1.1623 + *reclaimed += m; /* probably an fEXPUNGED msg */ 1.1624 + LOCAL->filesize = pos; /* set correct size */ 1.1625 + } 1.1626 + /* truncate file after last message */ 1.1627 + ftruncate (LOCAL->fd,LOCAL->filesize); 1.1628 + fsync (LOCAL->fd); /* force disk update */ 1.1629 + mm_nocritical (stream); /* release critical */ 1.1630 + flock (LOCAL->fd,LOCK_SH); /* allow sharers again */ 1.1631 + } 1.1632 + 1.1633 + else { /* can't get exclusive */ 1.1634 + flock (LOCAL->fd,LOCK_SH); /* recover previous shared mailbox lock */ 1.1635 + /* do hide-expunge when shared */ 1.1636 + if (flags) for (i = 1; i <= stream->nmsgs; ) { 1.1637 + if (elt = mbx_elt (stream,i,T)) { 1.1638 + /* make the message invisible */ 1.1639 + if (elt->deleted && ((flags > 0) || elt->sequence)) { 1.1640 + mbx_update_status (stream,elt->msgno,LONGT); 1.1641 + /* notify upper levels */ 1.1642 + mail_expunged (stream,i); 1.1643 + n++; /* count up one more expunged message */ 1.1644 + } 1.1645 + else { 1.1646 + i++; /* preserved message */ 1.1647 + if (elt->recent) ++recent; 1.1648 + } 1.1649 + } 1.1650 + else n++; /* count up one more expunged message */ 1.1651 + } 1.1652 + fsync (LOCAL->fd); /* force disk update */ 1.1653 + } 1.1654 + fstat (LOCAL->fd,&sbuf); /* get new write time */ 1.1655 + times.modtime = LOCAL->filetime = sbuf.st_mtime; 1.1656 + times.actime = time (0); /* reset atime to now */ 1.1657 + utime (stream->mailbox,×); 1.1658 + unlockfd (ld,lock); /* release exclusive parse/append permission */ 1.1659 + /* notify upper level of new mailbox size */ 1.1660 + mail_exists (stream,stream->nmsgs); 1.1661 + mail_recent (stream,recent); 1.1662 + return n; /* return number of expunged messages */ 1.1663 +} 1.1664 + 1.1665 +/* MBX mail lock for flag updating 1.1666 + * Accepts: stream 1.1667 + * Returns: T if successful, NIL if failure 1.1668 + */ 1.1669 + 1.1670 +long mbx_flaglock (MAILSTREAM *stream) 1.1671 +{ 1.1672 + struct stat sbuf; 1.1673 + unsigned long i; 1.1674 + int ld; 1.1675 + char lock[MAILTMPLEN]; 1.1676 + /* no-op if readonly or already locked */ 1.1677 + if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld < 0)) { 1.1678 + /* lock now */ 1.1679 + if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0) return NIL; 1.1680 + if (!LOCAL->flagcheck) { /* don't do this if flagcheck already needed */ 1.1681 + if (LOCAL->filetime) { /* know previous time? */ 1.1682 + fstat (LOCAL->fd,&sbuf);/* get current write time */ 1.1683 + if (LOCAL->filetime < sbuf.st_mtime) LOCAL->flagcheck = T; 1.1684 + LOCAL->filetime = 0; /* don't do this test for any other messages */ 1.1685 + } 1.1686 + if (!mbx_parse (stream)) {/* parse mailbox */ 1.1687 + unlockfd (ld,lock); /* shouldn't happen */ 1.1688 + return NIL; 1.1689 + } 1.1690 + if (LOCAL->flagcheck) /* invalidate cache if flagcheck */ 1.1691 + for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->valid = NIL; 1.1692 + } 1.1693 + LOCAL->ld = ld; /* copy to stream for subsequent calls */ 1.1694 + memcpy (LOCAL->lock,lock,MAILTMPLEN); 1.1695 + } 1.1696 + return LONGT; 1.1697 +}