imapext-2007: src/osdep/unix/mbx.c annotate

imapext-2007

annotate src/osdep/unix/mbx.c @ 0:ada5e610ab86

imap-2007e

author	yuuji@gentei.org
date	Mon, 14 Sep 2009 15:17:45 +0900
parents
children

rev	line source
yuuji@0	1 /* ========================================================================
yuuji@0	2 * Copyright 1988-2007 University of Washington
yuuji@0	3 *
yuuji@0	4 * Licensed under the Apache License, Version 2.0 (the "License");
yuuji@0	5 * you may not use this file except in compliance with the License.
yuuji@0	6 * You may obtain a copy of the License at
yuuji@0	7 *
yuuji@0	8 * http://www.apache.org/licenses/LICENSE-2.0
yuuji@0	9 *
yuuji@0	10 *
yuuji@0	11 * ========================================================================
yuuji@0	12 */
yuuji@0	13
yuuji@0	14 /*
yuuji@0	15 * Program: MBX mail routines
yuuji@0	16 *
yuuji@0	17 * Author: Mark Crispin
yuuji@0	18 * Networks and Distributed Computing
yuuji@0	19 * Computing & Communications
yuuji@0	20 * University of Washington
yuuji@0	21 * Administration Building, AG-44
yuuji@0	22 * Seattle, WA 98195
yuuji@0	23 * Internet: MRC@CAC.Washington.EDU
yuuji@0	24 *
yuuji@0	25 * Date: 3 October 1995
yuuji@0	26 * Last Edited: 11 October 2007
yuuji@0	27 */
yuuji@0	28
yuuji@0	29
yuuji@0	30 /* FILE TIME SEMANTICS
yuuji@0	31 *
yuuji@0	32 * The atime is the last read time of the file.
yuuji@0	33 * The mtime is the last flags update time of the file.
yuuji@0	34 * The ctime is the last write time of the file.
yuuji@0	35 */
yuuji@0	36
yuuji@0	37 #include <stdio.h>
yuuji@0	38 #include <ctype.h>
yuuji@0	39 #include <errno.h>
yuuji@0	40 extern int errno; /* just in case */
yuuji@0	41 #include "mail.h"
yuuji@0	42 #include "osdep.h"
yuuji@0	43 #include <pwd.h>
yuuji@0	44 #include <sys/stat.h>
yuuji@0	45 #include <sys/time.h>
yuuji@0	46 #include "misc.h"
yuuji@0	47 #include "dummy.h"
yuuji@0	48 #include "fdstring.h"
yuuji@0	49
yuuji@0	50
yuuji@0	51 /* Build parameters */
yuuji@0	52
yuuji@0	53 #define HDRSIZE 2048
yuuji@0	54
yuuji@0	55
yuuji@0	56 /* Kludge to make Cygwin happy */
yuuji@0	57
yuuji@0	58 #ifndef O_BINARY
yuuji@0	59 #define O_BINARY 0
yuuji@0	60 #endif
yuuji@0	61
yuuji@0	62 /* MBX I/O stream local data */
yuuji@0	63
yuuji@0	64 typedef struct mbx_local {
yuuji@0	65 unsigned int flagcheck: 1; /* if ping should sweep for flags */
yuuji@0	66 unsigned int expok: 1; /* if expunging OK in ping */
yuuji@0	67 unsigned int expunged : 1; /* if one or more expunged messages */
yuuji@0	68 int fd; /* file descriptor for I/O */
yuuji@0	69 int ld; /* lock file descriptor */
yuuji@0	70 int ffuserflag; /* first free user flag */
yuuji@0	71 off_t filesize; /* file size parsed */
yuuji@0	72 time_t filetime; /* last file time */
yuuji@0	73 time_t lastsnarf; /* last snarf time */
yuuji@0	74 unsigned long lastpid; /* PID of last writer */
yuuji@0	75 unsigned char buf; / temporary buffer */
yuuji@0	76 unsigned long buflen; /* current size of temporary buffer */
yuuji@0	77 char lock[MAILTMPLEN]; /* buffer to write lock name */
yuuji@0	78 } MBXLOCAL;
yuuji@0	79
yuuji@0	80
yuuji@0	81 /* Convenient access to local data */
yuuji@0	82
yuuji@0	83 #define LOCAL ((MBXLOCAL *) stream->local)
yuuji@0	84
yuuji@0	85 /* Function prototypes */
yuuji@0	86
yuuji@0	87 DRIVER mbx_valid (char name);
yuuji@0	88 int mbx_isvalid (MAILSTREAM *stream,char name,char tmp,int ld,char *lock,
yuuji@0	89 long flags);
yuuji@0	90 void mbx_parameters (long function,void value);
yuuji@0	91 void mbx_scan (MAILSTREAM stream,char ref,char pat,char contents);
yuuji@0	92 void mbx_list (MAILSTREAM stream,char ref,char *pat);
yuuji@0	93 void mbx_lsub (MAILSTREAM stream,char ref,char *pat);
yuuji@0	94 long mbx_create (MAILSTREAM stream,char mailbox);
yuuji@0	95 long mbx_delete (MAILSTREAM stream,char mailbox);
yuuji@0	96 long mbx_rename (MAILSTREAM stream,char old,char *newname);
yuuji@0	97 long mbx_status (MAILSTREAM stream,char mbx,long flags);
yuuji@0	98 MAILSTREAM mbx_open (MAILSTREAM stream);
yuuji@0	99 void mbx_close (MAILSTREAM *stream,long options);
yuuji@0	100 void mbx_abort (MAILSTREAM *stream);
yuuji@0	101 void mbx_flags (MAILSTREAM stream,char sequence,long flags);
yuuji@0	102 char mbx_header (MAILSTREAM stream,unsigned long msgno,unsigned long *length,
yuuji@0	103 long flags);
yuuji@0	104 long mbx_text (MAILSTREAM stream,unsigned long msgno,STRING bs,long flags);
yuuji@0	105 void mbx_flag (MAILSTREAM stream,char sequence,char *flag,long flags);
yuuji@0	106 void mbx_flagmsg (MAILSTREAM stream,MESSAGECACHE elt);
yuuji@0	107 long mbx_ping (MAILSTREAM *stream);
yuuji@0	108 void mbx_check (MAILSTREAM *stream);
yuuji@0	109 long mbx_expunge (MAILSTREAM stream,char sequence,long options);
yuuji@0	110 void mbx_snarf (MAILSTREAM *stream);
yuuji@0	111 long mbx_copy (MAILSTREAM stream,char sequence,char *mailbox,long options);
yuuji@0	112 long mbx_append (MAILSTREAM stream,char mailbox,append_t af,void *data);
yuuji@0	113
yuuji@0	114 char mbx_file (char dst,char *name);
yuuji@0	115 long mbx_parse (MAILSTREAM *stream);
yuuji@0	116 MESSAGECACHE mbx_elt (MAILSTREAM stream,unsigned long msgno,long expok);
yuuji@0	117 unsigned long mbx_read_flags (MAILSTREAM stream,MESSAGECACHE elt);
yuuji@0	118 void mbx_update_header (MAILSTREAM *stream);
yuuji@0	119 void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags);
yuuji@0	120 unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
yuuji@0	121 unsigned long size,char *hdr);
yuuji@0	122 unsigned long mbx_rewrite (MAILSTREAM stream,unsigned long reclaimed,
yuuji@0	123 long flags);
yuuji@0	124 long mbx_flaglock (MAILSTREAM *stream);
yuuji@0	125
yuuji@0	126 /* MBX mail routines */
yuuji@0	127
yuuji@0	128
yuuji@0	129 /* Driver dispatch used by MAIL */
yuuji@0	130
yuuji@0	131 DRIVER mbxdriver = {
yuuji@0	132 "mbx", /* driver name */
yuuji@0	133 DR_LOCAL\|DR_MAIL\|DR_CRLF\|DR_LOCKING,
yuuji@0	134 /* driver flags */
yuuji@0	135 (DRIVER ) NIL, / next driver */
yuuji@0	136 mbx_valid, /* mailbox is valid for us */
yuuji@0	137 mbx_parameters, /* manipulate parameters */
yuuji@0	138 mbx_scan, /* scan mailboxes */
yuuji@0	139 mbx_list, /* list mailboxes */
yuuji@0	140 mbx_lsub, /* list subscribed mailboxes */
yuuji@0	141 NIL, /* subscribe to mailbox */
yuuji@0	142 NIL, /* unsubscribe from mailbox */
yuuji@0	143 mbx_create, /* create mailbox */
yuuji@0	144 mbx_delete, /* delete mailbox */
yuuji@0	145 mbx_rename, /* rename mailbox */
yuuji@0	146 mbx_status, /* status of mailbox */
yuuji@0	147 mbx_open, /* open mailbox */
yuuji@0	148 mbx_close, /* close mailbox */
yuuji@0	149 mbx_flags, /* fetch message "fast" attributes */
yuuji@0	150 mbx_flags, /* fetch message flags */
yuuji@0	151 NIL, /* fetch overview */
yuuji@0	152 NIL, /* fetch message envelopes */
yuuji@0	153 mbx_header, /* fetch message header */
yuuji@0	154 mbx_text, /* fetch message body */
yuuji@0	155 NIL, /* fetch partial message text */
yuuji@0	156 NIL, /* unique identifier */
yuuji@0	157 NIL, /* message number */
yuuji@0	158 mbx_flag, /* modify flags */
yuuji@0	159 mbx_flagmsg, /* per-message modify flags */
yuuji@0	160 NIL, /* search for message based on criteria */
yuuji@0	161 NIL, /* sort messages */
yuuji@0	162 NIL, /* thread messages */
yuuji@0	163 mbx_ping, /* ping mailbox to see if still alive */
yuuji@0	164 mbx_check, /* check for new messages */
yuuji@0	165 mbx_expunge, /* expunge deleted messages */
yuuji@0	166 mbx_copy, /* copy messages to another mailbox */
yuuji@0	167 mbx_append, /* append string message to mailbox */
yuuji@0	168 NIL /* garbage collect stream */
yuuji@0	169 };
yuuji@0	170
yuuji@0	171 /* prototype stream */
yuuji@0	172 MAILSTREAM mbxproto = {&mbxdriver};
yuuji@0	173
yuuji@0	174 /* MBX mail validate mailbox
yuuji@0	175 * Accepts: mailbox name
yuuji@0	176 * Returns: our driver if name is valid, NIL otherwise
yuuji@0	177 */
yuuji@0	178
yuuji@0	179 DRIVER mbx_valid (char name)
yuuji@0	180 {
yuuji@0	181 char tmp[MAILTMPLEN];
yuuji@0	182 int fd = mbx_isvalid (NIL,name,tmp,NIL,NIL,NIL);
yuuji@0	183 if (fd < 0) return NIL;
yuuji@0	184 close (fd); /* don't need the fd now */
yuuji@0	185 return &mbxdriver;
yuuji@0	186 }
yuuji@0	187
yuuji@0	188
yuuji@0	189 /* MBX mail test for valid mailbox
yuuji@0	190 * Accepts: returned stream with valid mailbox keywords
yuuji@0	191 * mailbox name
yuuji@0	192 * scratch buffer
yuuji@0	193 * returned lock fd
yuuji@0	194 * returned lock name
yuuji@0	195 * RW flags or NIL for readonly
yuuji@0	196 * Returns: file descriptor if valid, NIL otherwise
yuuji@0	197 */
yuuji@0	198
yuuji@0	199 #define MBXISVALIDNOUID 0x1 /* RW, don't do UID action */
yuuji@0	200 #define MBXISVALIDUID 0x2 /* RW, do UID action */
yuuji@0	201
yuuji@0	202 int mbx_isvalid (MAILSTREAM *stream,char name,char tmp,int ld,char *lock,
yuuji@0	203 long flags)
yuuji@0	204 {
yuuji@0	205 int fd,upd;
yuuji@0	206 int ret = -1;
yuuji@0	207 unsigned long i;
yuuji@0	208 long j,k;
yuuji@0	209 off_t pos;
yuuji@0	210 char c,s,t,hdr[HDRSIZE];
yuuji@0	211 struct stat sbuf;
yuuji@0	212 time_t tp[2];
yuuji@0	213 int error = EINVAL; /* assume invalid argument */
yuuji@0	214 if (ld) ld = -1; / initially no lock */
yuuji@0	215 if ((s = mbx_file (tmp,name)) && !stat (s,&sbuf) &&
yuuji@0	216 ((fd = open (tmp,(flags ? O_RDWR : O_RDONLY)\|O_BINARY,NIL)) >= 0)) {
yuuji@0	217 error = -1; /* bogus format */
yuuji@0	218 /* I love cretinous C compilers -- don't you? */
yuuji@0	219 if (read (fd,hdr,HDRSIZE) == HDRSIZE)
yuuji@0	220 if ((hdr[0] == '*') && (hdr[1] == 'm') && (hdr[2] == 'b') &&
yuuji@0	221 (hdr[3] == 'x') && (hdr[4] == '*') && (hdr[5] == '\015') &&
yuuji@0	222 (hdr[6] == '\012') && isxdigit (hdr[7]) && isxdigit (hdr[8]))
yuuji@0	223 if (isxdigit (hdr[9]) && isxdigit (hdr[10]) && isxdigit (hdr[11]) &&
yuuji@0	224 isxdigit (hdr[12]) && isxdigit (hdr[13]) && isxdigit (hdr[14]) &&
yuuji@0	225 isxdigit (c = hdr[15]) && isxdigit (hdr[16]))
yuuji@0	226 if (isxdigit (hdr[17]) && isxdigit (hdr[18]) &&
yuuji@0	227 isxdigit (hdr[19]) && isxdigit (hdr[20]) &&
yuuji@0	228 isxdigit (hdr[21]) && isxdigit (hdr[22]) &&
yuuji@0	229 (hdr[23] == '\015') && (hdr[24] == '\012')) {
yuuji@0	230 ret = fd; /* mbx format */
yuuji@0	231
yuuji@0	232 if (stream) { /* lock if making mini-stream */
yuuji@0	233 if (flock (fd,LOCK_SH) \|\|
yuuji@0	234 (flags && ((*ld = lockfd (fd,lock,LOCK_EX)) < 0))) ret = -1;
yuuji@0	235 /* reread data now that locked */
yuuji@0	236 else if (lseek (fd,0,L_SET) \|\|
yuuji@0	237 (read (fd,hdr,HDRSIZE) != HDRSIZE)) ret = -1;
yuuji@0	238 else {
yuuji@0	239 stream = (MAILSTREAM ) memset (fs_get (sizeof (MAILSTREAM)),
yuuji@0	240 0,sizeof (MAILSTREAM));
yuuji@0	241 hdr[15] = '\0'; /* tie off UIDVALIDITY */
yuuji@0	242 (*stream)->uid_validity = strtoul (hdr+7,NIL,16);
yuuji@0	243 hdr[15] = c; /* now get UIDLAST */
yuuji@0	244 (*stream)->uid_last = strtoul (hdr+15,NIL,16);
yuuji@0	245 /* parse user flags */
yuuji@0	246 for (i = 0, s = hdr + 25;
yuuji@0	247 (i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s);
yuuji@0	248 i++, s = t + 2) {
yuuji@0	249 t = '\0'; / tie off flag */
yuuji@0	250 if (strlen (s) <= MAXUSERFLAG)
yuuji@0	251 (*stream)->user_flags[i] = cpystr (s);
yuuji@0	252 }
yuuji@0	253 /* make sure have true UIDLAST */
yuuji@0	254 if (flags & MBXISVALIDUID) {
yuuji@0	255 for (upd = NIL,pos = 2048, k = 0; pos < sbuf.st_size;
yuuji@0	256 pos += (j + k)) {
yuuji@0	257 /* read header for this message */
yuuji@0	258 lseek (fd,pos,L_SET);
yuuji@0	259 if ((j = read (fd,hdr,64)) >= 0) {
yuuji@0	260 hdr[j] = '\0';
yuuji@0	261 if ((s = strchr (hdr,'\015')) && (s[1] == '\012')) {
yuuji@0	262 *s = '\0';
yuuji@0	263 k = s + 2 - hdr;
yuuji@0	264 if ((s = strchr (hdr,',')) &&
yuuji@0	265 (j = strtol (s+1,&s,10)) && (*s == ';') &&
yuuji@0	266 (s = strchr (s+1,'-'))) {
yuuji@0	267 /* get UID if there is any */
yuuji@0	268 i = strtoul (++s,&t,16);
yuuji@0	269 if (!*t && (t == (s + 8)) &&
yuuji@0	270 (i <= (*stream)->uid_last)) {
yuuji@0	271 if (!i) {
yuuji@0	272 lseek (fd,pos + s - hdr,L_SET);
yuuji@0	273 sprintf (hdr,"%08lx",++(*stream)->uid_last);
yuuji@0	274 write (fd,hdr,8);
yuuji@0	275 upd = T;
yuuji@0	276 }
yuuji@0	277 continue;
yuuji@0	278 }
yuuji@0	279 }
yuuji@0	280 }
yuuji@0	281 ret = -1; /* error, give up */
yuuji@0	282 stream = mail_close (stream);
yuuji@0	283 pos = sbuf.st_size + 1;
yuuji@0	284 j = k = 0;
yuuji@0	285 }
yuuji@0	286 }
yuuji@0	287
yuuji@0	288 if (upd) { /* need to update hdr with new UIDLAST? */
yuuji@0	289 lseek (fd,15,L_SET);
yuuji@0	290 sprintf (hdr,"%08lx",(*stream)->uid_last);
yuuji@0	291 write (fd,hdr,8);
yuuji@0	292 }
yuuji@0	293 }
yuuji@0	294 }
yuuji@0	295 }
yuuji@0	296 }
yuuji@0	297 if (ret != fd) close (fd); /* close the file */
yuuji@0	298 else lseek (fd,0,L_SET); /* else rewind to start */
yuuji@0	299 /* \Marked status? */
yuuji@0	300 if (sbuf.st_ctime > sbuf.st_atime) {
yuuji@0	301 tp[0] = sbuf.st_atime; /* preserve atime and mtime */
yuuji@0	302 tp[1] = sbuf.st_mtime;
yuuji@0	303 utime (tmp,tp); /* set the times */
yuuji@0	304 }
yuuji@0	305 }
yuuji@0	306 /* in case INBOX but not mbx format */
yuuji@0	307 else if (((error = errno) == ENOENT) && !compare_cstring (name,"INBOX"))
yuuji@0	308 error = -1;
yuuji@0	309 if ((ret < 0) && ld && (*ld >= 0)) {
yuuji@0	310 unlockfd (*ld,lock);
yuuji@0	311 *ld = -1;
yuuji@0	312 }
yuuji@0	313 errno = error; /* return as last error */
yuuji@0	314 return ret; /* return what we should */
yuuji@0	315 }
yuuji@0	316
yuuji@0	317 /* MBX manipulate driver parameters
yuuji@0	318 * Accepts: function code
yuuji@0	319 * function-dependent value
yuuji@0	320 * Returns: function-dependent return value
yuuji@0	321 */
yuuji@0	322
yuuji@0	323 void mbx_parameters (long function,void value)
yuuji@0	324 {
yuuji@0	325 void *ret = NIL;
yuuji@0	326 switch ((int) function) {
yuuji@0	327 case GET_INBOXPATH:
yuuji@0	328 if (value) ret = mbx_file ((char *) value,"INBOX");
yuuji@0	329 break;
yuuji@0	330 case SET_ONETIMEEXPUNGEATPING:
yuuji@0	331 if (value) ((MBXLOCAL ) ((MAILSTREAM ) value)->local)->expok = T;
yuuji@0	332 case GET_ONETIMEEXPUNGEATPING:
yuuji@0	333 if (value) ret = (void *)
yuuji@0	334 (((MBXLOCAL ) ((MAILSTREAM ) value)->local)->expok ? VOIDT : NIL);
yuuji@0	335 break;
yuuji@0	336 }
yuuji@0	337 return ret;
yuuji@0	338 }
yuuji@0	339
yuuji@0	340
yuuji@0	341 /* MBX mail scan mailboxes
yuuji@0	342 * Accepts: mail stream
yuuji@0	343 * reference
yuuji@0	344 * pattern to search
yuuji@0	345 * string to scan
yuuji@0	346 */
yuuji@0	347
yuuji@0	348 void mbx_scan (MAILSTREAM stream,char ref,char pat,char contents)
yuuji@0	349 {
yuuji@0	350 if (stream) dummy_scan (NIL,ref,pat,contents);
yuuji@0	351 }
yuuji@0	352
yuuji@0	353
yuuji@0	354 /* MBX mail list mailboxes
yuuji@0	355 * Accepts: mail stream
yuuji@0	356 * reference
yuuji@0	357 * pattern to search
yuuji@0	358 */
yuuji@0	359
yuuji@0	360 void mbx_list (MAILSTREAM stream,char ref,char *pat)
yuuji@0	361 {
yuuji@0	362 if (stream) dummy_list (NIL,ref,pat);
yuuji@0	363 }
yuuji@0	364
yuuji@0	365
yuuji@0	366 /* MBX mail list subscribed mailboxes
yuuji@0	367 * Accepts: mail stream
yuuji@0	368 * reference
yuuji@0	369 * pattern to search
yuuji@0	370 */
yuuji@0	371
yuuji@0	372 void mbx_lsub (MAILSTREAM stream,char ref,char *pat)
yuuji@0	373 {
yuuji@0	374 if (stream) dummy_lsub (NIL,ref,pat);
yuuji@0	375 }
yuuji@0	376
yuuji@0	377 /* MBX mail create mailbox
yuuji@0	378 * Accepts: MAIL stream
yuuji@0	379 * mailbox name to create
yuuji@0	380 * Returns: T on success, NIL on failure
yuuji@0	381 */
yuuji@0	382
yuuji@0	383 long mbx_create (MAILSTREAM stream,char mailbox)
yuuji@0	384 {
yuuji@0	385 char s,t,mbx[MAILTMPLEN],tmp[HDRSIZE];
yuuji@0	386 long ret = NIL;
yuuji@0	387 int i,fd;
yuuji@0	388 if (!(s = mbx_file (mbx,mailbox))) {
yuuji@0	389 sprintf (mbx,"Can't create %.80s: invalid name",mailbox);
yuuji@0	390 MM_LOG (mbx,ERROR);
yuuji@0	391 }
yuuji@0	392 /* create underlying file */
yuuji@0	393 else if (dummy_create_path (stream,s,get_dir_protection (mailbox))) {
yuuji@0	394 /* done if made directory */
yuuji@0	395 if ((s = strrchr (s,'/')) && !s[1]) return T;
yuuji@0	396 if ((fd = open (mbx,O_WRONLY\|O_BINARY,NIL)) < 0) {
yuuji@0	397 sprintf (tmp,"Can't reopen mailbox node %.80s: %s",mbx,strerror (errno));
yuuji@0	398 MM_LOG (tmp,ERROR);
yuuji@0	399 unlink (mbx); /* delete the file */
yuuji@0	400 }
yuuji@0	401 else {
yuuji@0	402 memset (tmp,'\0',HDRSIZE);/* initialize header */
yuuji@0	403 sprintf (s = tmp,"mbx\015\012%08lx00000000\015\012",
yuuji@0	404 (unsigned long) time (0));
yuuji@0	405 for (i = 0; i < NUSERFLAGS; ++i) {
yuuji@0	406 t = (stream && stream->user_flags[i]) ? stream->user_flags[i] :
yuuji@0	407 ((t = default_user_flag (i)) ? t : "");
yuuji@0	408 sprintf (s += strlen (s),"%s\015\012",t);
yuuji@0	409 }
yuuji@0	410 if (write (fd,tmp,HDRSIZE) != HDRSIZE) {
yuuji@0	411 sprintf (tmp,"Can't initialize mailbox node %.80s: %s",
yuuji@0	412 mbx,strerror (errno));
yuuji@0	413 MM_LOG (tmp,ERROR);
yuuji@0	414 unlink (mbx); /* delete the file */
yuuji@0	415 }
yuuji@0	416 else ret = T; /* success */
yuuji@0	417 close (fd); /* close file */
yuuji@0	418 }
yuuji@0	419 }
yuuji@0	420 /* set proper protections */
yuuji@0	421 return ret ? set_mbx_protections (mailbox,mbx) : NIL;
yuuji@0	422 }
yuuji@0	423
yuuji@0	424
yuuji@0	425 /* MBX mail delete mailbox
yuuji@0	426 * Accepts: MAIL stream
yuuji@0	427 * mailbox name to delete
yuuji@0	428 * Returns: T on success, NIL on failure
yuuji@0	429 */
yuuji@0	430
yuuji@0	431 long mbx_delete (MAILSTREAM stream,char mailbox)
yuuji@0	432 {
yuuji@0	433 return mbx_rename (stream,mailbox,NIL);
yuuji@0	434 }
yuuji@0	435
yuuji@0	436 /* MBX mail rename mailbox
yuuji@0	437 * Accepts: MAIL stream
yuuji@0	438 * old mailbox name
yuuji@0	439 * new mailbox name (or NIL for delete)
yuuji@0	440 * Returns: T on success, NIL on failure
yuuji@0	441 */
yuuji@0	442
yuuji@0	443 long mbx_rename (MAILSTREAM stream,char old,char *newname)
yuuji@0	444 {
yuuji@0	445 long ret = LONGT;
yuuji@0	446 char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
yuuji@0	447 int fd,ld;
yuuji@0	448 struct stat sbuf;
yuuji@0	449 if (!mbx_file (file,old) \|\|
yuuji@0	450 (newname && (!((s = mailboxfile (tmp,newname)) && *s) \|\|
yuuji@0	451 ((s = strrchr (tmp,'/')) && !s[1])))) {
yuuji@0	452 sprintf (tmp,newname ?
yuuji@0	453 "Can't rename mailbox %.80s to %.80s: invalid name" :
yuuji@0	454 "Can't delete mailbox %.80s: invalid name",
yuuji@0	455 old,newname);
yuuji@0	456 MM_LOG (tmp,ERROR);
yuuji@0	457 return NIL;
yuuji@0	458 }
yuuji@0	459 else if ((fd = open (file,O_RDWR\|O_BINARY,NIL)) < 0) {
yuuji@0	460 sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno));
yuuji@0	461 MM_LOG (tmp,ERROR);
yuuji@0	462 return NIL;
yuuji@0	463 }
yuuji@0	464 /* get parse/append permission */
yuuji@0	465 if ((ld = lockfd (fd,lock,LOCK_EX)) < 0) {
yuuji@0	466 MM_LOG ("Unable to lock rename mailbox",ERROR);
yuuji@0	467 return NIL;
yuuji@0	468 }
yuuji@0	469 /* lock out other users */
yuuji@0	470 if (flock (fd,LOCK_EX\|LOCK_NB)) {
yuuji@0	471 close (fd); /* couldn't lock, give up on it then */
yuuji@0	472 sprintf (tmp,"Mailbox %.80s is in use by another process",old);
yuuji@0	473 MM_LOG (tmp,ERROR);
yuuji@0	474 unlockfd (ld,lock); /* release exclusive parse/append permission */
yuuji@0	475 return NIL;
yuuji@0	476 }
yuuji@0	477
yuuji@0	478 if (newname) { /* want rename? */
yuuji@0	479 /* found superior to destination name? */
yuuji@0	480 if (s = strrchr (tmp,'/')) {
yuuji@0	481 c = ++s; / remember first character of inferior */
yuuji@0	482 s = '\0'; / tie off to get just superior */
yuuji@0	483 /* superior name doesn't exist, create it */
yuuji@0	484 if ((stat (tmp,&sbuf) \|\| ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
yuuji@0	485 !dummy_create_path (stream,tmp,get_dir_protection (newname)))
yuuji@0	486 ret = NIL;
yuuji@0	487 else s = c; / restore full name */
yuuji@0	488 }
yuuji@0	489 /* rename the file */
yuuji@0	490 if (ret && rename (file,tmp)) {
yuuji@0	491 sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",old,newname,
yuuji@0	492 strerror (errno));
yuuji@0	493 MM_LOG (tmp,ERROR);
yuuji@0	494 ret = NIL; /* set failure */
yuuji@0	495 }
yuuji@0	496 }
yuuji@0	497 else if (unlink (file)) {
yuuji@0	498 sprintf (tmp,"Can't delete mailbox %.80s: %s",old,strerror (errno));
yuuji@0	499 MM_LOG (tmp,ERROR);
yuuji@0	500 ret = NIL; /* set failure */
yuuji@0	501 }
yuuji@0	502 flock (fd,LOCK_UN); /* release lock on the file */
yuuji@0	503 unlockfd (ld,lock); /* release exclusive parse/append permission */
yuuji@0	504 close (fd); /* close the file */
yuuji@0	505 /* recreate file if renamed INBOX */
yuuji@0	506 if (ret && !compare_cstring (old,"INBOX")) mbx_create (NIL,"INBOX");
yuuji@0	507 return ret; /* return success */
yuuji@0	508 }
yuuji@0	509
yuuji@0	510 /* MBX Mail status
yuuji@0	511 * Accepts: mail stream
yuuji@0	512 * mailbox name
yuuji@0	513 * status flags
yuuji@0	514 * Returns: T on success, NIL on failure
yuuji@0	515 */
yuuji@0	516
yuuji@0	517 long mbx_status (MAILSTREAM stream,char mbx,long flags)
yuuji@0	518 {
yuuji@0	519 MAILSTATUS status;
yuuji@0	520 unsigned long i;
yuuji@0	521 MAILSTREAM *tstream = NIL;
yuuji@0	522 MAILSTREAM *systream = NIL;
yuuji@0	523 /* make temporary stream (unless this mbx) */
yuuji@0	524 if (!stream && !(stream = tstream =
yuuji@0	525 mail_open (NIL,mbx,OP_READONLY\|OP_SILENT)))
yuuji@0	526 return NIL;
yuuji@0	527 status.flags = flags; /* return status values */
yuuji@0	528 status.messages = stream->nmsgs;
yuuji@0	529 status.recent = stream->recent;
yuuji@0	530 if (flags & SA_UNSEEN) /* must search to get unseen messages */
yuuji@0	531 for (i = 1,status.unseen = 0; i <= stream->nmsgs; i++)
yuuji@0	532 if (!mail_elt (stream,i)->seen) status.unseen++;
yuuji@0	533 status.uidnext = stream->uid_last + 1;
yuuji@0	534 status.uidvalidity = stream->uid_validity;
yuuji@0	535 /* calculate post-snarf results */
yuuji@0	536 if (!status.recent && stream->inbox &&
yuuji@0	537 (systream = mail_open (NIL,sysinbox (),OP_READONLY\|OP_SILENT))) {
yuuji@0	538 status.messages += systream->nmsgs;
yuuji@0	539 status.recent += systream->recent;
yuuji@0	540 if (flags & SA_UNSEEN) /* must search to get unseen messages */
yuuji@0	541 for (i = 1; i <= systream->nmsgs; i++)
yuuji@0	542 if (!mail_elt (systream,i)->seen) status.unseen++;
yuuji@0	543 /* kludge but probably good enough */
yuuji@0	544 status.uidnext += systream->nmsgs;
yuuji@0	545 }
yuuji@0	546 MM_STATUS(stream,mbx,&status);/* pass status to main program */
yuuji@0	547 if (tstream) mail_close (tstream);
yuuji@0	548 if (systream) mail_close (systream);
yuuji@0	549 return T; /* success */
yuuji@0	550 }
yuuji@0	551
yuuji@0	552 /* MBX mail open
yuuji@0	553 * Accepts: stream to open
yuuji@0	554 * Returns: stream on success, NIL on failure
yuuji@0	555 */
yuuji@0	556
yuuji@0	557 MAILSTREAM mbx_open (MAILSTREAM stream)
yuuji@0	558 {
yuuji@0	559 int fd,ld;
yuuji@0	560 short silent;
yuuji@0	561 char tmp[MAILTMPLEN];
yuuji@0	562 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
yuuji@0	563 /* return prototype for OP_PROTOTYPE call */
yuuji@0	564 if (!stream) return user_flags (&mbxproto);
yuuji@0	565 if (stream->local) fatal ("mbx recycle stream");
yuuji@0	566 /* canonicalize the mailbox name */
yuuji@0	567 if (!mbx_file (tmp,stream->mailbox)) {
yuuji@0	568 sprintf (tmp,"Can't open - invalid name: %.80s",stream->mailbox);
yuuji@0	569 MM_LOG (tmp,ERROR);
yuuji@0	570 }
yuuji@0	571 if (stream->rdonly \|\|
yuuji@0	572 (fd = open (tmp,O_RDWR\|O_BINARY,NIL)) < 0) {
yuuji@0	573 if ((fd = open (tmp,O_RDONLY\|O_BINARY,NIL)) < 0) {
yuuji@0	574 sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
yuuji@0	575 MM_LOG (tmp,ERROR);
yuuji@0	576 return NIL;
yuuji@0	577 }
yuuji@0	578 else if (!stream->rdonly) { /* got it, but readonly */
yuuji@0	579 MM_LOG ("Can't get write access to mailbox, access is readonly",WARN);
yuuji@0	580 stream->rdonly = T;
yuuji@0	581 }
yuuji@0	582 }
yuuji@0	583
yuuji@0	584 stream->local = memset (fs_get (sizeof (MBXLOCAL)),NIL,sizeof (MBXLOCAL));
yuuji@0	585 LOCAL->fd = fd; /* bind the file */
yuuji@0	586 LOCAL->ld = -1; /* no flaglock */
yuuji@0	587 LOCAL->buf = (char *) fs_get (CHUNKSIZE);
yuuji@0	588 LOCAL->buflen = CHUNKSIZE - 1;
yuuji@0	589 /* note if an INBOX or not */
yuuji@0	590 stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
yuuji@0	591 fs_give ((void **) &stream->mailbox);
yuuji@0	592 stream->mailbox = cpystr (tmp);
yuuji@0	593 /* get parse/append permission */
yuuji@0	594 if ((ld = lockfd (LOCAL->fd,tmp,LOCK_EX)) < 0) {
yuuji@0	595 MM_LOG ("Unable to lock open mailbox",ERROR);
yuuji@0	596 return NIL;
yuuji@0	597 }
yuuji@0	598 (*bn) (BLOCK_FILELOCK,NIL);
yuuji@0	599 flock (LOCAL->fd,LOCK_SH); /* lock the file */
yuuji@0	600 (*bn) (BLOCK_NONE,NIL);
yuuji@0	601 unlockfd (ld,tmp); /* release shared parse permission */
yuuji@0	602 LOCAL->filesize = HDRSIZE; /* initialize parsed file size */
yuuji@0	603 /* time not set up yet */
yuuji@0	604 LOCAL->lastsnarf = LOCAL->filetime = 0;
yuuji@0	605 LOCAL->expok = LOCAL->flagcheck = NIL;
yuuji@0	606 stream->sequence++; /* bump sequence number */
yuuji@0	607 /* parse mailbox */
yuuji@0	608 stream->nmsgs = stream->recent = 0;
yuuji@0	609 silent = stream->silent; /* defer events */
yuuji@0	610 stream->silent = T;
yuuji@0	611 if (mbx_ping (stream) && !stream->nmsgs)
yuuji@0	612 MM_LOG ("Mailbox is empty",(long) NIL);
yuuji@0	613 stream->silent = silent; /* now notify upper level */
yuuji@0	614 mail_exists (stream,stream->nmsgs);
yuuji@0	615 mail_recent (stream,stream->recent);
yuuji@0	616 if (!LOCAL) return NIL; /* failure if stream died */
yuuji@0	617 stream->perm_seen = stream->perm_deleted = stream->perm_flagged =
yuuji@0	618 stream->perm_answered = stream->perm_draft = stream->rdonly ? NIL : T;
yuuji@0	619 stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
yuuji@0	620 stream->kwd_create = (stream->user_flags[NUSERFLAGS-1] \|\| stream->rdonly) ?
yuuji@0	621 NIL : T; /* can we create new user flags? */
yuuji@0	622 return stream; /* return stream to caller */
yuuji@0	623 }
yuuji@0	624
yuuji@0	625 /* MBX mail close
yuuji@0	626 * Accepts: MAIL stream
yuuji@0	627 * close options
yuuji@0	628 */
yuuji@0	629
yuuji@0	630 void mbx_close (MAILSTREAM *stream,long options)
yuuji@0	631 {
yuuji@0	632 if (stream && LOCAL) { /* only if a file is open */
yuuji@0	633 int silent = stream->silent;
yuuji@0	634 stream->silent = T; /* note this stream is dying */
yuuji@0	635 /* do an expunge if requested */
yuuji@0	636 if (options & CL_EXPUNGE) mbx_expunge (stream,NIL,NIL);
yuuji@0	637 else { /* otherwise do a checkpoint to purge */
yuuji@0	638 LOCAL->expok = T; /* possible expunged messages */
yuuji@0	639 mbx_ping (stream);
yuuji@0	640 }
yuuji@0	641 stream->silent = silent; /* restore previous status */
yuuji@0	642 mbx_abort (stream);
yuuji@0	643 }
yuuji@0	644 }
yuuji@0	645
yuuji@0	646
yuuji@0	647 /* MBX mail abort stream
yuuji@0	648 * Accepts: MAIL stream
yuuji@0	649 */
yuuji@0	650
yuuji@0	651 void mbx_abort (MAILSTREAM *stream)
yuuji@0	652 {
yuuji@0	653 if (stream && LOCAL) { /* only if a file is open */
yuuji@0	654 flock (LOCAL->fd,LOCK_UN); /* unlock local file */
yuuji@0	655 close (LOCAL->fd); /* close the local file */
yuuji@0	656 /* free local text buffer */
yuuji@0	657 if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
yuuji@0	658 /* nuke the local data */
yuuji@0	659 fs_give ((void **) &stream->local);
yuuji@0	660 stream->dtb = NIL; /* log out the DTB */
yuuji@0	661 }
yuuji@0	662 }
yuuji@0	663
yuuji@0	664
yuuji@0	665 /* MBX mail fetch flags
yuuji@0	666 * Accepts: MAIL stream
yuuji@0	667 * sequence
yuuji@0	668 * option flags
yuuji@0	669 * Sniffs at file to see if some other process changed the flags
yuuji@0	670 */
yuuji@0	671
yuuji@0	672 void mbx_flags (MAILSTREAM stream,char sequence,long flags)
yuuji@0	673 {
yuuji@0	674 MESSAGECACHE *elt;
yuuji@0	675 unsigned long i;
yuuji@0	676 if (mbx_ping (stream) && /* ping mailbox, get new status for messages */
yuuji@0	677 ((flags & FT_UID) ? mail_uid_sequence (stream,sequence) :
yuuji@0	678 mail_sequence (stream,sequence)))
yuuji@0	679 for (i = 1; i <= stream->nmsgs; i++)
yuuji@0	680 if ((elt = mail_elt (stream,i))->sequence && !elt->valid)
yuuji@0	681 mbx_elt (stream,i,NIL);
yuuji@0	682 }
yuuji@0	683
yuuji@0	684 /* MBX mail fetch message header
yuuji@0	685 * Accepts: MAIL stream
yuuji@0	686 * message # to fetch
yuuji@0	687 * pointer to returned header text length
yuuji@0	688 * option flags
yuuji@0	689 * Returns: message header in RFC822 format
yuuji@0	690 */
yuuji@0	691
yuuji@0	692 char mbx_header (MAILSTREAM stream,unsigned long msgno,unsigned long *length,
yuuji@0	693 long flags)
yuuji@0	694 {
yuuji@0	695 unsigned long i;
yuuji@0	696 char *s;
yuuji@0	697 length = 0; / default to empty */
yuuji@0	698 if (flags & FT_UID) return "";/* UID call "impossible" */
yuuji@0	699 /* get header position, possibly header */
yuuji@0	700 i = mbx_hdrpos (stream,msgno,length,&s);
yuuji@0	701 if (!s) { /* mbx_hdrpos() returned header? */
yuuji@0	702 lseek (LOCAL->fd,i,L_SET); /* no, get to header position */
yuuji@0	703 /* is buffer big enough? */
yuuji@0	704 if (*length > LOCAL->buflen) {
yuuji@0	705 fs_give ((void **) &LOCAL->buf);
yuuji@0	706 LOCAL->buf = (char ) fs_get ((LOCAL->buflen = length) + 1);
yuuji@0	707 }
yuuji@0	708 /* slurp the data */
yuuji@0	709 read (LOCAL->fd,s = LOCAL->buf,*length);
yuuji@0	710 }
yuuji@0	711 s[length] = '\0'; / tie off string */
yuuji@0	712 return s;
yuuji@0	713 }
yuuji@0	714
yuuji@0	715 /* MBX mail fetch message text (body only)
yuuji@0	716 * Accepts: MAIL stream
yuuji@0	717 * message # to fetch
yuuji@0	718 * pointer to returned header text length
yuuji@0	719 * option flags
yuuji@0	720 * Returns: T on success, NIL on failure
yuuji@0	721 */
yuuji@0	722
yuuji@0	723 long mbx_text (MAILSTREAM stream,unsigned long msgno,STRING bs,long flags)
yuuji@0	724 {
yuuji@0	725 FDDATA d;
yuuji@0	726 unsigned long i,j;
yuuji@0	727 MESSAGECACHE *elt;
yuuji@0	728 /* UID call "impossible" */
yuuji@0	729 if (flags & FT_UID) return NIL;
yuuji@0	730 /* get message status */
yuuji@0	731 elt = mbx_elt (stream,msgno,NIL);
yuuji@0	732 /* if message not seen */
yuuji@0	733 if (!(flags & FT_PEEK) && !elt->seen && mbx_flaglock (stream)) {
yuuji@0	734 elt->seen = T; /* mark message as seen */
yuuji@0	735 /* recalculate status */
yuuji@0	736 mbx_update_status (stream,msgno,NIL);
yuuji@0	737 MM_FLAGS (stream,msgno);
yuuji@0	738 /* update flags */
yuuji@0	739 mbx_flag (stream,NIL,NIL,NIL);
yuuji@0	740 }
yuuji@0	741 if (!LOCAL) return NIL; /* mbx_flaglock() could have aborted */
yuuji@0	742 /* find header position */
yuuji@0	743 i = mbx_hdrpos (stream,msgno,&j,NIL);
yuuji@0	744 d.fd = LOCAL->fd; /* set up file descriptor */
yuuji@0	745 d.pos = i + j;
yuuji@0	746 d.chunk = LOCAL->buf; /* initial buffer chunk */
yuuji@0	747 d.chunksize = CHUNKSIZE;
yuuji@0	748 INIT (bs,fd_string,&d,elt->rfc822_size - j);
yuuji@0	749 return LONGT; /* success */
yuuji@0	750 }
yuuji@0	751
yuuji@0	752 /* MBX mail modify flags
yuuji@0	753 * Accepts: MAIL stream
yuuji@0	754 * sequence
yuuji@0	755 * flag(s)
yuuji@0	756 * option flags
yuuji@0	757 * Unlocks flag lock
yuuji@0	758 */
yuuji@0	759
yuuji@0	760 void mbx_flag (MAILSTREAM stream,char sequence,char *flag,long flags)
yuuji@0	761 {
yuuji@0	762 time_t tp[2];
yuuji@0	763 struct stat sbuf;
yuuji@0	764 unsigned long oldpid = LOCAL->lastpid;
yuuji@0	765 /* make sure the update takes */
yuuji@0	766 if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld >= 0)) {
yuuji@0	767 fsync (LOCAL->fd);
yuuji@0	768 fstat (LOCAL->fd,&sbuf); /* get current write time */
yuuji@0	769 tp[1] = LOCAL->filetime = sbuf.st_mtime;
yuuji@0	770 /* we are the last flag updater */
yuuji@0	771 LOCAL->lastpid = (unsigned long) getpid ();
yuuji@0	772 /* update header if needed */
yuuji@0	773 if (((LOCAL->ffuserflag < NUSERFLAGS) &&
yuuji@0	774 stream->user_flags[LOCAL->ffuserflag]) \|\| (oldpid != LOCAL->lastpid))
yuuji@0	775 mbx_update_header (stream);
yuuji@0	776 tp[0] = time (0); /* make sure read comes after all that */
yuuji@0	777 utime (stream->mailbox,tp);
yuuji@0	778 }
yuuji@0	779 if (LOCAL->ld >= 0) { /* unlock now */
yuuji@0	780 unlockfd (LOCAL->ld,LOCAL->lock);
yuuji@0	781 LOCAL->ld = -1;
yuuji@0	782 }
yuuji@0	783 }
yuuji@0	784
yuuji@0	785
yuuji@0	786 /* MBX mail per-message modify flags
yuuji@0	787 * Accepts: MAIL stream
yuuji@0	788 * message cache element
yuuji@0	789 */
yuuji@0	790
yuuji@0	791 void mbx_flagmsg (MAILSTREAM stream,MESSAGECACHE elt)
yuuji@0	792 {
yuuji@0	793 if (mbx_flaglock (stream)) mbx_update_status (stream,elt->msgno,NIL);
yuuji@0	794 }
yuuji@0	795
yuuji@0	796 /* MBX mail ping mailbox
yuuji@0	797 * Accepts: MAIL stream
yuuji@0	798 * Returns: T if stream still alive, NIL if not
yuuji@0	799 */
yuuji@0	800
yuuji@0	801 long mbx_ping (MAILSTREAM *stream)
yuuji@0	802 {
yuuji@0	803 unsigned long i,pos;
yuuji@0	804 long ret = NIL;
yuuji@0	805 int ld;
yuuji@0	806 char lock[MAILTMPLEN];
yuuji@0	807 MESSAGECACHE *elt;
yuuji@0	808 struct stat sbuf;
yuuji@0	809 if (stream && LOCAL) { /* only if stream already open */
yuuji@0	810 int snarf = stream->inbox && !stream->rdonly;
yuuji@0	811 ret = LONGT; /* assume OK */
yuuji@0	812 fstat (LOCAL->fd,&sbuf); /* get current file poop */
yuuji@0	813 /* allow expunge if permitted at ping */
yuuji@0	814 if (mail_parameters (NIL,GET_EXPUNGEATPING,NIL)) LOCAL->expok = T;
yuuji@0	815 /* if external modification */
yuuji@0	816 if (LOCAL->filetime && (LOCAL->filetime < sbuf.st_mtime))
yuuji@0	817 LOCAL->flagcheck = T; /* upgrade to flag checking */
yuuji@0	818 /* new mail or flagcheck handling needed? */
yuuji@0	819 if (((sbuf.st_size - LOCAL->filesize) \|\| LOCAL->flagcheck \|\|
yuuji@0	820 !stream->nmsgs \|\| snarf) &&
yuuji@0	821 ((ld = lockfd (LOCAL->fd,lock,LOCK_EX)) >= 0)) {
yuuji@0	822 /* reparse header if not flagchecking */
yuuji@0	823 if (!LOCAL->flagcheck) ret = mbx_parse (stream);
yuuji@0	824 /* sweep mailbox for changed message status */
yuuji@0	825 else if (ret = mbx_parse (stream)) {
yuuji@0	826 unsigned long recent = 0;
yuuji@0	827 LOCAL->filetime = sbuf.st_mtime;
yuuji@0	828 for (i = 1; i <= stream->nmsgs; )
yuuji@0	829 if (elt = mbx_elt (stream,i,LOCAL->expok)) {
yuuji@0	830 if (elt->recent) ++recent;
yuuji@0	831 ++i;
yuuji@0	832 }
yuuji@0	833 mail_recent (stream,recent);
yuuji@0	834 LOCAL->flagcheck = NIL; /* got all the updates */
yuuji@0	835 }
yuuji@0	836 /* always reparse header at least */
yuuji@0	837 if (ret && snarf) { /* snarf new messages if still OK */
yuuji@0	838 mbx_snarf (stream);
yuuji@0	839 /* parse snarfed messages */
yuuji@0	840 ret = mbx_parse (stream);
yuuji@0	841 }
yuuji@0	842 unlockfd (ld,lock); /* release shared parse/append permission */
yuuji@0	843 }
yuuji@0	844 if (ret) { /* must still be alive */
yuuji@0	845 if (!LOCAL->expunged) /* look for holes if none known yet */
yuuji@0	846 for (i = 1, pos = HDRSIZE;
yuuji@0	847 !LOCAL->expunged && (i <= stream->nmsgs);
yuuji@0	848 i++, pos += elt->private.special.text.size + elt->rfc822_size)
yuuji@0	849 if ((elt = mail_elt (stream,i))->private.special.offset != pos)
yuuji@0	850 LOCAL->expunged = T;/* found a hole */
yuuji@0	851 /* burp any holes */
yuuji@0	852 if (LOCAL->expunged && !stream->rdonly) {
yuuji@0	853 if (mbx_rewrite (stream,&i,NIL)) fatal ("expunge on check");
yuuji@0	854 if (i) { /* any space reclaimed? */
yuuji@0	855 LOCAL->expunged = NIL;/* no more pending expunge */
yuuji@0	856 sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",i);
yuuji@0	857 MM_LOG (LOCAL->buf,(long) NIL);
yuuji@0	858 }
yuuji@0	859 }
yuuji@0	860 LOCAL->expok = NIL; /* no more expok */
yuuji@0	861 }
yuuji@0	862 }
yuuji@0	863 return ret; /* return result of the parse */
yuuji@0	864 }
yuuji@0	865
yuuji@0	866 /* MBX mail check mailbox (reparses status too)
yuuji@0	867 * Accepts: MAIL stream
yuuji@0	868 */
yuuji@0	869
yuuji@0	870 void mbx_check (MAILSTREAM *stream)
yuuji@0	871 {
yuuji@0	872 if (LOCAL) LOCAL->expok = T; /* mark that a check is desired */
yuuji@0	873 if (mbx_ping (stream)) MM_LOG ("Check completed",(long) NIL);
yuuji@0	874 }
yuuji@0	875
yuuji@0	876
yuuji@0	877 /* MBX mail expunge mailbox
yuuji@0	878 * Accepts: MAIL stream
yuuji@0	879 * sequence to expunge if non-NIL
yuuji@0	880 * expunge options
yuuji@0	881 * Returns: T if success, NIL if failure
yuuji@0	882 */
yuuji@0	883
yuuji@0	884 long mbx_expunge (MAILSTREAM stream,char sequence,long options)
yuuji@0	885 {
yuuji@0	886 long ret;
yuuji@0	887 unsigned long nexp,reclaimed;
yuuji@0	888 if (ret = sequence ? ((options & EX_UID) ?
yuuji@0	889 mail_uid_sequence (stream,sequence) :
yuuji@0	890 mail_sequence (stream,sequence)) : LONGT) {
yuuji@0	891 if (!mbx_ping (stream)); /* do nothing if stream dead */
yuuji@0	892 else if (stream->rdonly) /* won't do on readonly files! */
yuuji@0	893 MM_LOG ("Expunge ignored on readonly mailbox",WARN);
yuuji@0	894 /* if expunged any messages */
yuuji@0	895 else if (nexp = mbx_rewrite (stream,&reclaimed,sequence ? -1 : 1)) {
yuuji@0	896 sprintf (LOCAL->buf,"Expunged %lu messages",nexp);
yuuji@0	897 MM_LOG (LOCAL->buf,(long) NIL);
yuuji@0	898 }
yuuji@0	899 else if (reclaimed) { /* or if any prior expunged space reclaimed */
yuuji@0	900 sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",reclaimed);
yuuji@0	901 MM_LOG (LOCAL->buf,(long) NIL);
yuuji@0	902 }
yuuji@0	903 else MM_LOG ("No messages deleted, so no update needed",(long) NIL);
yuuji@0	904 }
yuuji@0	905 return ret;
yuuji@0	906 }
yuuji@0	907
yuuji@0	908 /* MBX mail snarf messages from system inbox
yuuji@0	909 * Accepts: MAIL stream, already locked
yuuji@0	910 */
yuuji@0	911
yuuji@0	912 void mbx_snarf (MAILSTREAM *stream)
yuuji@0	913 {
yuuji@0	914 unsigned long i = 0;
yuuji@0	915 unsigned long j,r,hdrlen,txtlen;
yuuji@0	916 struct stat sbuf;
yuuji@0	917 char hdr,txt,tmp[MAILTMPLEN];
yuuji@0	918 MESSAGECACHE *elt;
yuuji@0	919 MAILSTREAM *sysibx = NIL;
yuuji@0	920 /* give up if can't get exclusive permission */
yuuji@0	921 if ((time (0) >= (LOCAL->lastsnarf +
yuuji@0	922 (long) mail_parameters (NIL,GET_SNARFINTERVAL,NIL))) &&
yuuji@0	923 strcmp (sysinbox (),stream->mailbox)) {
yuuji@0	924 MM_CRITICAL (stream); /* go critical */
yuuji@0	925 /* sizes match and anything in sysinbox? */
yuuji@0	926 if (!stat (sysinbox (),&sbuf) && sbuf.st_size &&
yuuji@0	927 !fstat (LOCAL->fd,&sbuf) && (sbuf.st_size == LOCAL->filesize) &&
yuuji@0	928 (sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) &&
yuuji@0	929 (!sysibx->rdonly) && (r = sysibx->nmsgs)) {
yuuji@0	930 /* yes, go to end of file in our mailbox */
yuuji@0	931 lseek (LOCAL->fd,sbuf.st_size,L_SET);
yuuji@0	932 /* for each message in sysibx mailbox */
yuuji@0	933 while (r && (++i <= sysibx->nmsgs)) {
yuuji@0	934 /* snarf message from system INBOX */
yuuji@0	935 hdr = cpystr (mail_fetchheader_full (sysibx,i,NIL,&hdrlen,NIL));
yuuji@0	936 txt = mail_fetchtext_full (sysibx,i,&txtlen,FT_PEEK);
yuuji@0	937 /* if have a message */
yuuji@0	938 if (j = hdrlen + txtlen) {
yuuji@0	939 /* build header line */
yuuji@0	940 mail_date (LOCAL->buf,elt = mail_elt (sysibx,i));
yuuji@0	941 sprintf (LOCAL->buf + strlen (LOCAL->buf),
yuuji@0	942 ",%lu;00000000%04x-00000000\015\012",j,(unsigned)
yuuji@0	943 ((fSEEN * elt->seen) +
yuuji@0	944 (fDELETED * elt->deleted) + (fFLAGGED * elt->flagged) +
yuuji@0	945 (fANSWERED * elt->answered) + (fDRAFT * elt->draft)));
yuuji@0	946 /* copy message */
yuuji@0	947 if ((write (LOCAL->fd,LOCAL->buf,strlen (LOCAL->buf)) < 0) \|\|
yuuji@0	948 (write (LOCAL->fd,hdr,hdrlen) < 0) \|\|
yuuji@0	949 (write (LOCAL->fd,txt,txtlen) < 0)) r = 0;
yuuji@0	950 }
yuuji@0	951 fs_give ((void **) &hdr);
yuuji@0	952 }
yuuji@0	953
yuuji@0	954 /* make sure all the updates take */
yuuji@0	955 if (fsync (LOCAL->fd)) r = 0;
yuuji@0	956 if (r) { /* delete all the messages we copied */
yuuji@0	957 if (r == 1) strcpy (tmp,"1");
yuuji@0	958 else sprintf (tmp,"1:%lu",r);
yuuji@0	959 mail_setflag (sysibx,tmp,"\\Deleted");
yuuji@0	960 mail_expunge (sysibx); /* now expunge all those messages */
yuuji@0	961 }
yuuji@0	962 else {
yuuji@0	963 sprintf (LOCAL->buf,"Can't copy new mail: %s",strerror (errno));
yuuji@0	964 MM_LOG (LOCAL->buf,WARN);
yuuji@0	965 ftruncate (LOCAL->fd,sbuf.st_size);
yuuji@0	966 }
yuuji@0	967 fstat (LOCAL->fd,&sbuf); /* yes, get current file size */
yuuji@0	968 LOCAL->filetime = sbuf.st_mtime;
yuuji@0	969 }
yuuji@0	970 if (sysibx) mail_close (sysibx);
yuuji@0	971 MM_NOCRITICAL (stream); /* release critical */
yuuji@0	972 LOCAL->lastsnarf = time (0);/* note time of last snarf */
yuuji@0	973 }
yuuji@0	974 }
yuuji@0	975
yuuji@0	976 /* MBX mail copy message(s)
yuuji@0	977 * Accepts: MAIL stream
yuuji@0	978 * sequence
yuuji@0	979 * destination mailbox
yuuji@0	980 * copy options
yuuji@0	981 * Returns: T if success, NIL if failed
yuuji@0	982 */
yuuji@0	983
yuuji@0	984 long mbx_copy (MAILSTREAM stream,char sequence,char *mailbox,long options)
yuuji@0	985 {
yuuji@0	986 struct stat sbuf;
yuuji@0	987 time_t tp[2];
yuuji@0	988 MESSAGECACHE *elt;
yuuji@0	989 unsigned long i,j,k,m;
yuuji@0	990 long ret = LONGT;
yuuji@0	991 int fd,ld;
yuuji@0	992 char s,t,file[MAILTMPLEN],lock[MAILTMPLEN];
yuuji@0	993 mailproxycopy_t pc =
yuuji@0	994 (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
yuuji@0	995 copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
yuuji@0	996 SEARCHSET *source = cu ? mail_newsearchset () : NIL;
yuuji@0	997 SEARCHSET *dest = cu ? mail_newsearchset () : NIL;
yuuji@0	998 MAILSTREAM *dstream = NIL;
yuuji@0	999 if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
yuuji@0	1000 mail_sequence (stream,sequence))) return NIL;
yuuji@0	1001 /* make sure valid mailbox */
yuuji@0	1002 if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
yuuji@0	1003 cu ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
yuuji@0	1004 switch (errno) {
yuuji@0	1005 case ENOENT: /* no such file? */
yuuji@0	1006 MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
yuuji@0	1007 return NIL;
yuuji@0	1008 case EACCES: /* file protected */
yuuji@0	1009 sprintf (LOCAL->buf,"Can't access destination: %.80s",mailbox);
yuuji@0	1010 MM_LOG (LOCAL->buf,ERROR);
yuuji@0	1011 return NIL;
yuuji@0	1012 case EINVAL:
yuuji@0	1013 if (pc) return (*pc) (stream,sequence,mailbox,options);
yuuji@0	1014 sprintf (LOCAL->buf,"Invalid MBX-format mailbox name: %.80s",mailbox);
yuuji@0	1015 MM_LOG (LOCAL->buf,ERROR);
yuuji@0	1016 return NIL;
yuuji@0	1017 default:
yuuji@0	1018 if (pc) return (*pc) (stream,sequence,mailbox,options);
yuuji@0	1019 sprintf (LOCAL->buf,"Not a MBX-format mailbox: %.80s",mailbox);
yuuji@0	1020 MM_LOG (LOCAL->buf,ERROR);
yuuji@0	1021 return NIL;
yuuji@0	1022 }
yuuji@0	1023 MM_CRITICAL (stream); /* go critical */
yuuji@0	1024 fstat (fd,&sbuf); /* get current file size */
yuuji@0	1025 lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
yuuji@0	1026
yuuji@0	1027 /* for each requested message */
yuuji@0	1028 for (i = 1; ret && (i <= stream->nmsgs); i++)
yuuji@0	1029 if ((elt = mail_elt (stream,i))->sequence) {
yuuji@0	1030 lseek (LOCAL->fd,elt->private.special.offset +
yuuji@0	1031 elt->private.special.text.size,L_SET);
yuuji@0	1032 mail_date(LOCAL->buf,elt);/* build target header */
yuuji@0	1033 /* get target keyword mask */
yuuji@0	1034 for (j = elt->user_flags, k = 0; j; )
yuuji@0	1035 if (s = stream->user_flags[find_rightmost_bit (&j)])
yuuji@0	1036 for (m = 0; (m < NUSERFLAGS) && (t = dstream->user_flags[m]); m++)
yuuji@0	1037 if (!compare_cstring (s,t) && (k \|= 1 << m)) break;
yuuji@0	1038 sprintf (LOCAL->buf+strlen(LOCAL->buf),",%lu;%08lx%04x-%08lx\015\012",
yuuji@0	1039 elt->rfc822_size,k,(unsigned)
yuuji@0	1040 ((fSEEN * elt->seen) + (fDELETED * elt->deleted) +
yuuji@0	1041 (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
yuuji@0	1042 (fDRAFT * elt->draft)),cu ? ++dstream->uid_last : 0);
yuuji@0	1043 /* write target header */
yuuji@0	1044 if (ret = (write (fd,LOCAL->buf,strlen (LOCAL->buf)) > 0)) {
yuuji@0	1045 for (k = elt->rfc822_size; ret && (j = min (k,LOCAL->buflen)); k -= j){
yuuji@0	1046 read (LOCAL->fd,LOCAL->buf,j);
yuuji@0	1047 ret = write (fd,LOCAL->buf,j) >= 0;
yuuji@0	1048 }
yuuji@0	1049 if (cu) { /* need to pass back new UID? */
yuuji@0	1050 mail_append_set (source,mail_uid (stream,i));
yuuji@0	1051 mail_append_set (dest,dstream->uid_last);
yuuji@0	1052 }
yuuji@0	1053 }
yuuji@0	1054 }
yuuji@0	1055
yuuji@0	1056 /* make sure all the updates take */
yuuji@0	1057 if (!(ret && (ret = !fsync (fd)))) {
yuuji@0	1058 sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno));
yuuji@0	1059 MM_LOG (LOCAL->buf,ERROR);
yuuji@0	1060 ftruncate (fd,sbuf.st_size);
yuuji@0	1061 }
yuuji@0	1062 if (cu && ret) { /* return sets if doing COPYUID */
yuuji@0	1063 (*cu) (stream,mailbox,dstream->uid_validity,source,dest);
yuuji@0	1064 lseek (fd,15,L_SET); /* update UIDLAST */
yuuji@0	1065 sprintf (LOCAL->buf,"%08lx",dstream->uid_last);
yuuji@0	1066 write (fd,LOCAL->buf,8);
yuuji@0	1067 }
yuuji@0	1068 else { /* flush any sets we may have built */
yuuji@0	1069 mail_free_searchset (&source);
yuuji@0	1070 mail_free_searchset (&dest);
yuuji@0	1071 }
yuuji@0	1072 if (ret) tp[0] = time (0) - 1;/* set atime to now-1 if successful copy */
yuuji@0	1073 /* else preserve \Marked status */
yuuji@0	1074 else tp[0] = (sbuf.st_ctime > sbuf.st_atime) ? sbuf.st_atime : time(0);
yuuji@0	1075 tp[1] = sbuf.st_mtime; /* preserve mtime */
yuuji@0	1076 utime (file,tp); /* set the times */
yuuji@0	1077 close (fd); /* close the file */
yuuji@0	1078 MM_NOCRITICAL (stream); /* release critical */
yuuji@0	1079 unlockfd (ld,lock); /* release exclusive parse/append permission */
yuuji@0	1080 /* delete all requested messages */
yuuji@0	1081 if (ret && (options & CP_MOVE) && mbx_flaglock (stream)) {
yuuji@0	1082 for (i = 1; i <= stream->nmsgs; i++) if (mail_elt (stream,i)->sequence) {
yuuji@0	1083 /* mark message deleted */
yuuji@0	1084 mbx_elt (stream,i,NIL)->deleted = T;
yuuji@0	1085 /* recalculate status */
yuuji@0	1086 mbx_update_status (stream,i,NIL);
yuuji@0	1087 }
yuuji@0	1088 /* update flags */
yuuji@0	1089 mbx_flag (stream,NIL,NIL,NIL);
yuuji@0	1090 }
yuuji@0	1091 if (dstream != stream) mail_close (dstream);
yuuji@0	1092 return ret;
yuuji@0	1093 }
yuuji@0	1094
yuuji@0	1095 /* MBX mail append message from stringstruct
yuuji@0	1096 * Accepts: MAIL stream
yuuji@0	1097 * destination mailbox
yuuji@0	1098 * append callback
yuuji@0	1099 * data for callback
yuuji@0	1100 * Returns: T if append successful, else NIL
yuuji@0	1101 */
yuuji@0	1102
yuuji@0	1103 long mbx_append (MAILSTREAM stream,char mailbox,append_t af,void *data)
yuuji@0	1104 {
yuuji@0	1105 struct stat sbuf;
yuuji@0	1106 int fd,ld;
yuuji@0	1107 char flags,date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
yuuji@0	1108 time_t tp[2];
yuuji@0	1109 FILE *df;
yuuji@0	1110 MESSAGECACHE elt;
yuuji@0	1111 long f;
yuuji@0	1112 unsigned long i,uf;
yuuji@0	1113 STRING *message;
yuuji@0	1114 long ret = NIL;
yuuji@0	1115 MAILSTREAM *dstream = NIL;
yuuji@0	1116 appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
yuuji@0	1117 SEARCHSET *dst = au ? mail_newsearchset () : NIL;
yuuji@0	1118 /* make sure valid mailbox */
yuuji@0	1119 if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
yuuji@0	1120 au ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
yuuji@0	1121 switch (errno) {
yuuji@0	1122 case ENOENT: /* no such file? */
yuuji@0	1123 if (compare_cstring (mailbox,"INBOX")) {
yuuji@0	1124 MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before append",NIL);
yuuji@0	1125 return NIL;
yuuji@0	1126 }
yuuji@0	1127 /* can create INBOX here */
yuuji@0	1128 mbx_create (dstream = stream ? stream : user_flags (&mbxproto),"INBOX");
yuuji@0	1129 if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
yuuji@0	1130 au ? MBXISVALIDUID : MBXISVALIDNOUID)) >= 0)
yuuji@0	1131 break;
yuuji@0	1132 case EACCES: /* file protected */
yuuji@0	1133 sprintf (tmp,"Can't access destination: %.80s",mailbox);
yuuji@0	1134 MM_LOG (tmp,ERROR);
yuuji@0	1135 return NIL;
yuuji@0	1136 case EINVAL:
yuuji@0	1137 sprintf (tmp,"Invalid MBX-format mailbox name: %.80s",mailbox);
yuuji@0	1138 MM_LOG (tmp,ERROR);
yuuji@0	1139 return NIL;
yuuji@0	1140 default:
yuuji@0	1141 sprintf (tmp,"Not a MBX-format mailbox: %.80s",mailbox);
yuuji@0	1142 MM_LOG (tmp,ERROR);
yuuji@0	1143 return NIL;
yuuji@0	1144 }
yuuji@0	1145
yuuji@0	1146 /* get first message */
yuuji@0	1147 if (!MM_APPEND (af) (dstream,data,&flags,&date,&message)) close (fd);
yuuji@0	1148 else if (!(df = fdopen (fd,"r+b"))) {
yuuji@0	1149 MM_LOG ("Unable to reopen append mailbox",ERROR);
yuuji@0	1150 close (fd);
yuuji@0	1151 }
yuuji@0	1152 else {
yuuji@0	1153 MM_CRITICAL (dstream); /* go critical */
yuuji@0	1154 fstat (fd,&sbuf); /* get current file size */
yuuji@0	1155 fseek (df,sbuf.st_size,SEEK_SET);
yuuji@0	1156 errno = 0;
yuuji@0	1157 for (ret = LONGT; ret && message; ) {
yuuji@0	1158 if (!SIZE (message)) { /* guard against zero-length */
yuuji@0	1159 MM_LOG ("Append of zero-length message",ERROR);
yuuji@0	1160 ret = NIL;
yuuji@0	1161 break;
yuuji@0	1162 }
yuuji@0	1163 f = mail_parse_flags (dstream,flags,&uf);
yuuji@0	1164 if (date) { /* parse date if given */
yuuji@0	1165 if (!mail_parse_date (&elt,date)) {
yuuji@0	1166 sprintf (tmp,"Bad date in append: %.80s",date);
yuuji@0	1167 MM_LOG (tmp,ERROR);
yuuji@0	1168 ret = NIL; /* mark failure */
yuuji@0	1169 break;
yuuji@0	1170 }
yuuji@0	1171 mail_date (tmp,&elt); /* write preseved date */
yuuji@0	1172 }
yuuji@0	1173 else internal_date (tmp); /* get current date in IMAP format */
yuuji@0	1174 /* write header */
yuuji@0	1175 if (fprintf (df,"%s,%lu;%08lx%04lx-%08lx\015\012",tmp,i = SIZE (message),
yuuji@0	1176 uf,(unsigned long) f,au ? ++dstream->uid_last : 0) < 0)
yuuji@0	1177 ret = NIL;
yuuji@0	1178 else { /* write message */
yuuji@0	1179 size_t j;
yuuji@0	1180 if (!message->cursize) SETPOS (message,GETPOS (message));
yuuji@0	1181 while (i && (j = fwrite (message->curpos,1,message->cursize,df))) {
yuuji@0	1182 i -= j;
yuuji@0	1183 SETPOS (message,GETPOS (message) + j);
yuuji@0	1184 }
yuuji@0	1185 /* get next message */
yuuji@0	1186 if (i \|\| !MM_APPEND (af) (dstream,data,&flags,&date,&message))
yuuji@0	1187 ret = NIL;
yuuji@0	1188 else if (au) mail_append_set (dst,dstream->uid_last);
yuuji@0	1189 }
yuuji@0	1190 }
yuuji@0	1191
yuuji@0	1192 /* if error... */
yuuji@0	1193 if (!ret \|\| (fflush (df) == EOF)) {
yuuji@0	1194 /* revert file */
yuuji@0	1195 ftruncate (fd,sbuf.st_size);
yuuji@0	1196 close (fd); /* make sure fclose() doesn't corrupt us */
yuuji@0	1197 if (errno) {
yuuji@0	1198 sprintf (tmp,"Message append failed: %s",strerror (errno));
yuuji@0	1199 MM_LOG (tmp,ERROR);
yuuji@0	1200 }
yuuji@0	1201 ret = NIL;
yuuji@0	1202 }
yuuji@0	1203 if (au && ret) { /* return sets if doing APPENDUID */
yuuji@0	1204 (*au) (mailbox,dstream->uid_validity,dst);
yuuji@0	1205 fseek (df,15,SEEK_SET); /* update UIDLAST */
yuuji@0	1206 fprintf (df,"%08lx",dstream->uid_last);
yuuji@0	1207 }
yuuji@0	1208 else mail_free_searchset (&dst);
yuuji@0	1209 /* set atime to now-1 if successful copy */
yuuji@0	1210 if (ret) tp[0] = time (0) - 1;
yuuji@0	1211 /* else preserve \Marked status */
yuuji@0	1212 else tp[0] = (sbuf.st_ctime > sbuf.st_atime) ? sbuf.st_atime : time(0);
yuuji@0	1213 tp[1] = sbuf.st_mtime; /* preserve mtime */
yuuji@0	1214 utime (file,tp); /* set the times */
yuuji@0	1215 fclose (df); /* close the file */
yuuji@0	1216 MM_NOCRITICAL (dstream); /* release critical */
yuuji@0	1217 }
yuuji@0	1218 unlockfd (ld,lock); /* release exclusive parse/append permission */
yuuji@0	1219 if (dstream != stream) mail_close (dstream);
yuuji@0	1220 return ret;
yuuji@0	1221 }
yuuji@0	1222
yuuji@0	1223 /* Internal routines */
yuuji@0	1224
yuuji@0	1225
yuuji@0	1226 /* MBX mail generate file string
yuuji@0	1227 * Accepts: temporary buffer to write into
yuuji@0	1228 * mailbox name string
yuuji@0	1229 * Returns: local file string or NIL if failure
yuuji@0	1230 */
yuuji@0	1231
yuuji@0	1232 char mbx_file (char dst,char *name)
yuuji@0	1233 {
yuuji@0	1234 char *s = mailboxfile (dst,name);
yuuji@0	1235 return (s && !*s) ? mailboxfile (dst,"~/INBOX") : s;
yuuji@0	1236 }
yuuji@0	1237
yuuji@0	1238 /* MBX mail parse mailbox
yuuji@0	1239 * Accepts: MAIL stream
yuuji@0	1240 * Returns: T if parse OK
yuuji@0	1241 * NIL if failure, stream aborted
yuuji@0	1242 */
yuuji@0	1243
yuuji@0	1244 long mbx_parse (MAILSTREAM *stream)
yuuji@0	1245 {
yuuji@0	1246 struct stat sbuf;
yuuji@0	1247 MESSAGECACHE *elt = NIL;
yuuji@0	1248 unsigned char c,s,t,*x;
yuuji@0	1249 char tmp[MAILTMPLEN];
yuuji@0	1250 unsigned long i,j,k,m;
yuuji@0	1251 off_t curpos = LOCAL->filesize;
yuuji@0	1252 unsigned long nmsgs = stream->nmsgs;
yuuji@0	1253 unsigned long recent = stream->recent;
yuuji@0	1254 unsigned long lastuid = 0;
yuuji@0	1255 short dirty = NIL;
yuuji@0	1256 short added = NIL;
yuuji@0	1257 short silent = stream->silent;
yuuji@0	1258 short uidwarn = T;
yuuji@0	1259 fstat (LOCAL->fd,&sbuf); /* get status */
yuuji@0	1260 if (sbuf.st_size < curpos) { /* sanity check */
yuuji@0	1261 sprintf (tmp,"Mailbox shrank from %lu to %lu!",
yuuji@0	1262 (unsigned long) curpos,(unsigned long) sbuf.st_size);
yuuji@0	1263 MM_LOG (tmp,ERROR);
yuuji@0	1264 mbx_abort (stream);
yuuji@0	1265 return NIL;
yuuji@0	1266 }
yuuji@0	1267 lseek (LOCAL->fd,0,L_SET); /* rewind file */
yuuji@0	1268 /* read internal header */
yuuji@0	1269 read (LOCAL->fd,LOCAL->buf,HDRSIZE);
yuuji@0	1270 LOCAL->buf[HDRSIZE] = '\0'; /* tie off header */
yuuji@0	1271 c = LOCAL->buf[15]; /* save first character of last UID */
yuuji@0	1272 LOCAL->buf[15] = '\0';
yuuji@0	1273 /* parse UID validity */
yuuji@0	1274 stream->uid_validity = strtoul (LOCAL->buf + 7,NIL,16);
yuuji@0	1275 LOCAL->buf[15] = c; /* restore first character of last UID */
yuuji@0	1276 /* parse last UID */
yuuji@0	1277 i = strtoul (LOCAL->buf + 15,NIL,16);
yuuji@0	1278 stream->uid_last = stream->rdonly ? max (i,stream->uid_last) : i;
yuuji@0	1279 /* parse user flags */
yuuji@0	1280 for (i = 0, s = LOCAL->buf + 25;
yuuji@0	1281 (i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s);
yuuji@0	1282 i++, s = t + 2) {
yuuji@0	1283 t = '\0'; / tie off flag */
yuuji@0	1284 if (!stream->user_flags[i] && (strlen (s) <= MAXUSERFLAG))
yuuji@0	1285 stream->user_flags[i] = cpystr (s);
yuuji@0	1286 }
yuuji@0	1287 LOCAL->ffuserflag = (int) i; /* first free user flag */
yuuji@0	1288
yuuji@0	1289 /* get current last flag updater PID */
yuuji@0	1290 i = (isxdigit (LOCAL->buf[HDRSIZE-10]) && isxdigit (LOCAL->buf[HDRSIZE-9]) &&
yuuji@0	1291 isxdigit (LOCAL->buf[HDRSIZE-8]) && isxdigit (LOCAL->buf[HDRSIZE-7]) &&
yuuji@0	1292 isxdigit (LOCAL->buf[HDRSIZE-6]) && isxdigit (LOCAL->buf[HDRSIZE-5]) &&
yuuji@0	1293 isxdigit (LOCAL->buf[HDRSIZE-4]) && isxdigit (LOCAL->buf[HDRSIZE-3]) &&
yuuji@0	1294 (LOCAL->buf[HDRSIZE-2] == '\015') && (LOCAL->buf[HDRSIZE-1] == '\012'))?
yuuji@0	1295 strtoul (LOCAL->buf + HDRSIZE - 8,NIL,16) : 0;
yuuji@0	1296 /* set flagcheck if lastpid changed */
yuuji@0	1297 if (LOCAL->lastpid && (LOCAL->lastpid != i)) LOCAL->flagcheck = T;
yuuji@0	1298 LOCAL->lastpid = i; /* set as last PID */
yuuji@0	1299 stream->silent = T; /* don't pass up exists events yet */
yuuji@0	1300 while (sbuf.st_size - curpos){/* while there is stuff to parse */
yuuji@0	1301 /* get to that position in the file */
yuuji@0	1302 lseek (LOCAL->fd,curpos,L_SET);
yuuji@0	1303 if ((i = read (LOCAL->fd,LOCAL->buf,64)) <= 0) {
yuuji@0	1304 sprintf (tmp,"Unable to read internal header at %lu, size = %lu: %s",
yuuji@0	1305 (unsigned long) curpos,(unsigned long) sbuf.st_size,
yuuji@0	1306 i ? strerror (errno) : "no data read");
yuuji@0	1307 MM_LOG (tmp,ERROR);
yuuji@0	1308 mbx_abort (stream);
yuuji@0	1309 return NIL;
yuuji@0	1310 }
yuuji@0	1311 LOCAL->buf[i] = '\0'; /* tie off buffer just in case */
yuuji@0	1312 if (!((s = strchr (LOCAL->buf,'\015')) && (s[1] == '\012'))) {
yuuji@0	1313 sprintf (tmp,"Unable to find CRLF at %lu in %lu bytes, text: %.80s",
yuuji@0	1314 (unsigned long) curpos,i,(char *) LOCAL->buf);
yuuji@0	1315 MM_LOG (tmp,ERROR);
yuuji@0	1316 mbx_abort (stream);
yuuji@0	1317 return NIL;
yuuji@0	1318 }
yuuji@0	1319 s = '\0'; / tie off header line */
yuuji@0	1320 i = (s + 2) - LOCAL->buf; /* note start of text offset */
yuuji@0	1321 if (!((s = strchr (LOCAL->buf,',')) && (t = strchr (s+1,';')))) {
yuuji@0	1322 sprintf (tmp,"Unable to parse internal header at %lu: %.80s",
yuuji@0	1323 (unsigned long) curpos,(char *) LOCAL->buf);
yuuji@0	1324 MM_LOG (tmp,ERROR);
yuuji@0	1325 mbx_abort (stream);
yuuji@0	1326 return NIL;
yuuji@0	1327 }
yuuji@0	1328 if (!(isxdigit (t[1]) && isxdigit (t[2]) && isxdigit (t[3]) &&
yuuji@0	1329 isxdigit (t[4]) && isxdigit (t[5]) && isxdigit (t[6]) &&
yuuji@0	1330 isxdigit (t[7]) && isxdigit (t[8]) && isxdigit (t[9]) &&
yuuji@0	1331 isxdigit (t[10]) && isxdigit (t[11]) && isxdigit (t[12]))) {
yuuji@0	1332 sprintf (tmp,"Unable to parse message flags at %lu: %.80s",
yuuji@0	1333 (unsigned long) curpos,(char *) LOCAL->buf);
yuuji@0	1334 MM_LOG (tmp,ERROR);
yuuji@0	1335 mbx_abort (stream);
yuuji@0	1336 return NIL;
yuuji@0	1337 }
yuuji@0	1338 if ((t[13] != '-') \|\| t[22] \|\|
yuuji@0	1339 !(isxdigit (t[14]) && isxdigit (t[15]) && isxdigit (t[16]) &&
yuuji@0	1340 isxdigit (t[17]) && isxdigit (t[18]) && isxdigit (t[19]) &&
yuuji@0	1341 isxdigit (t[20]) && isxdigit (t[21]))) {
yuuji@0	1342 sprintf (tmp,"Unable to parse message UID at %lu: %.80s",
yuuji@0	1343 (unsigned long) curpos,(char *) LOCAL->buf);
yuuji@0	1344 MM_LOG (tmp,ERROR);
yuuji@0	1345 mbx_abort (stream);
yuuji@0	1346 return NIL;
yuuji@0	1347 }
yuuji@0	1348
yuuji@0	1349 s++ = '\0'; t++ = '\0'; /* break up fields */
yuuji@0	1350 /* get message size */
yuuji@0	1351 if (!(j = strtoul (s,(char *) &x,10)) && (!(x && x))) {
yuuji@0	1352 sprintf (tmp,"Unable to parse message size at %lu: %.80s,%.80s;%.80s",
yuuji@0	1353 (unsigned long) curpos,(char ) LOCAL->buf,(char ) s,
yuuji@0	1354 (char *) t);
yuuji@0	1355 MM_LOG (tmp,ERROR);
yuuji@0	1356 mbx_abort (stream);
yuuji@0	1357 return NIL;
yuuji@0	1358 }
yuuji@0	1359 /* make sure didn't run off end of file */
yuuji@0	1360 if (((off_t) (curpos + i + j)) > sbuf.st_size) {
yuuji@0	1361 sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
yuuji@0	1362 (unsigned long) curpos,(unsigned long) (curpos + i + j),
yuuji@0	1363 (unsigned long) sbuf.st_size);
yuuji@0	1364 MM_LOG (tmp,ERROR);
yuuji@0	1365 mbx_abort (stream);
yuuji@0	1366 return NIL;
yuuji@0	1367 }
yuuji@0	1368 /* parse UID */
yuuji@0	1369 if ((m = strtoul (t+13,NIL,16)) &&
yuuji@0	1370 ((m <= lastuid) \|\| (m > stream->uid_last))) {
yuuji@0	1371 if (uidwarn) {
yuuji@0	1372 sprintf (tmp,"Invalid UID %08lx in message %lu, rebuilding UIDs",
yuuji@0	1373 m,nmsgs+1);
yuuji@0	1374 MM_LOG (tmp,WARN);
yuuji@0	1375 uidwarn = NIL;
yuuji@0	1376 /* restart UID validity */
yuuji@0	1377 stream->uid_validity = time (0);
yuuji@0	1378 }
yuuji@0	1379 m = 0; /* lose this UID */
yuuji@0	1380 dirty = T; /* mark dirty, set new lastuid */
yuuji@0	1381 stream->uid_last = lastuid;
yuuji@0	1382 }
yuuji@0	1383
yuuji@0	1384 t[12] = '\0'; /* parse system flags */
yuuji@0	1385 if ((k = strtoul (t+8,NIL,16)) & fEXPUNGED) {
yuuji@0	1386 if (m) lastuid = m; /* expunge message, update last UID seen */
yuuji@0	1387 else { /* no UID assigned? */
yuuji@0	1388 lastuid = ++stream->uid_last;
yuuji@0	1389 dirty = T;
yuuji@0	1390 }
yuuji@0	1391 }
yuuji@0	1392 else { /* not expunged, swell the cache */
yuuji@0	1393 added = T; /* note that a new message was added */
yuuji@0	1394 mail_exists (stream,++nmsgs);
yuuji@0	1395 /* instantiate an elt for this message */
yuuji@0	1396 (elt = mail_elt (stream,nmsgs))->valid = T;
yuuji@0	1397 /* parse the date */
yuuji@0	1398 if (!mail_parse_date (elt,LOCAL->buf)) {
yuuji@0	1399 sprintf (tmp,"Unable to parse message date at %lu: %.80s",
yuuji@0	1400 (unsigned long) curpos,(char *) LOCAL->buf);
yuuji@0	1401 MM_LOG (tmp,ERROR);
yuuji@0	1402 mbx_abort (stream);
yuuji@0	1403 return NIL;
yuuji@0	1404 }
yuuji@0	1405 /* note file offset of header */
yuuji@0	1406 elt->private.special.offset = curpos;
yuuji@0	1407 /* and internal header size */
yuuji@0	1408 elt->private.special.text.size = i;
yuuji@0	1409 /* header size not known yet */
yuuji@0	1410 elt->private.msg.header.text.size = 0;
yuuji@0	1411 elt->rfc822_size = j; /* note message size */
yuuji@0	1412 /* calculate system flags */
yuuji@0	1413 if (k & fSEEN) elt->seen = T;
yuuji@0	1414 if (k & fDELETED) elt->deleted = T;
yuuji@0	1415 if (k & fFLAGGED) elt->flagged = T;
yuuji@0	1416 if (k & fANSWERED) elt->answered = T;
yuuji@0	1417 if (k & fDRAFT) elt->draft = T;
yuuji@0	1418 t[8] = '\0'; /* get user flags value */
yuuji@0	1419 elt->user_flags = strtoul (t,NIL,16);
yuuji@0	1420 /* UID already assigned? */
yuuji@0	1421 if (!(elt->private.uid = m) \|\| !(k & fOLD)) {
yuuji@0	1422 elt->recent = T; /* no, mark as recent */
yuuji@0	1423 ++recent; /* count up a new recent message */
yuuji@0	1424 dirty = T; /* and must rewrite header */
yuuji@0	1425 /* assign new UID */
yuuji@0	1426 if (!elt->private.uid) elt->private.uid = ++stream->uid_last;
yuuji@0	1427 mbx_update_status (stream,elt->msgno,NIL);
yuuji@0	1428 }
yuuji@0	1429 /* update last parsed UID */
yuuji@0	1430 lastuid = elt->private.uid;
yuuji@0	1431 }
yuuji@0	1432 curpos += i + j; /* update position */
yuuji@0	1433 }
yuuji@0	1434
yuuji@0	1435 if (dirty && !stream->rdonly){/* update header */
yuuji@0	1436 mbx_update_header (stream);
yuuji@0	1437 fsync (LOCAL->fd); /* make sure all the UID updates take */
yuuji@0	1438 }
yuuji@0	1439 /* update parsed file size and time */
yuuji@0	1440 LOCAL->filesize = sbuf.st_size;
yuuji@0	1441 fstat (LOCAL->fd,&sbuf); /* get status again to ensure time is right */
yuuji@0	1442 LOCAL->filetime = sbuf.st_mtime;
yuuji@0	1443 if (added && !stream->rdonly){/* make sure atime updated */
yuuji@0	1444 time_t tp[2];
yuuji@0	1445 tp[0] = time (0);
yuuji@0	1446 tp[1] = LOCAL->filetime;
yuuji@0	1447 utime (stream->mailbox,tp);
yuuji@0	1448 }
yuuji@0	1449 stream->silent = silent; /* can pass up events now */
yuuji@0	1450 mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
yuuji@0	1451 mail_recent (stream,recent); /* and of change in recent messages */
yuuji@0	1452 return LONGT; /* return the winnage */
yuuji@0	1453 }
yuuji@0	1454
yuuji@0	1455 /* MBX get cache element with status updating from file
yuuji@0	1456 * Accepts: MAIL stream
yuuji@0	1457 * message number
yuuji@0	1458 * expunge OK flag
yuuji@0	1459 * Returns: cache element
yuuji@0	1460 */
yuuji@0	1461
yuuji@0	1462 MESSAGECACHE mbx_elt (MAILSTREAM stream,unsigned long msgno,long expok)
yuuji@0	1463 {
yuuji@0	1464 MESSAGECACHE *elt = mail_elt (stream,msgno);
yuuji@0	1465 struct { /* old flags */
yuuji@0	1466 unsigned int seen : 1;
yuuji@0	1467 unsigned int deleted : 1;
yuuji@0	1468 unsigned int flagged : 1;
yuuji@0	1469 unsigned int answered : 1;
yuuji@0	1470 unsigned int draft : 1;
yuuji@0	1471 unsigned long user_flags;
yuuji@0	1472 } old;
yuuji@0	1473 old.seen = elt->seen; old.deleted = elt->deleted; old.flagged = elt->flagged;
yuuji@0	1474 old.answered = elt->answered; old.draft = elt->draft;
yuuji@0	1475 old.user_flags = elt->user_flags;
yuuji@0	1476 /* get new flags */
yuuji@0	1477 if (mbx_read_flags (stream,elt) && expok) {
yuuji@0	1478 mail_expunged (stream,elt->msgno);
yuuji@0	1479 return NIL; /* return this message was expunged */
yuuji@0	1480 }
yuuji@0	1481 if ((old.seen != elt->seen) \|\| (old.deleted != elt->deleted) \|\|
yuuji@0	1482 (old.flagged != elt->flagged) \|\| (old.answered != elt->answered) \|\|
yuuji@0	1483 (old.draft != elt->draft) \|\| (old.user_flags != elt->user_flags))
yuuji@0	1484 MM_FLAGS (stream,msgno); /* let top level know */
yuuji@0	1485 return elt;
yuuji@0	1486 }
yuuji@0	1487
yuuji@0	1488 /* MBX read flags from file
yuuji@0	1489 * Accepts: MAIL stream
yuuji@0	1490 * cache element
yuuji@0	1491 * Returns: non-NIL if message expunged
yuuji@0	1492 */
yuuji@0	1493
yuuji@0	1494 unsigned long mbx_read_flags (MAILSTREAM stream,MESSAGECACHE elt)
yuuji@0	1495 {
yuuji@0	1496 unsigned long i;
yuuji@0	1497 struct stat sbuf;
yuuji@0	1498 fstat (LOCAL->fd,&sbuf); /* get status */
yuuji@0	1499 /* make sure file size is good */
yuuji@0	1500 if (sbuf.st_size < LOCAL->filesize) {
yuuji@0	1501 sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag read!",
yuuji@0	1502 (unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
yuuji@0	1503 fatal (LOCAL->buf);
yuuji@0	1504 }
yuuji@0	1505 /* set the seek pointer */
yuuji@0	1506 lseek (LOCAL->fd,(off_t) elt->private.special.offset +
yuuji@0	1507 elt->private.special.text.size - 24,L_SET);
yuuji@0	1508 /* read the new flags */
yuuji@0	1509 if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
yuuji@0	1510 sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
yuuji@0	1511 fatal (LOCAL->buf);
yuuji@0	1512 }
yuuji@0	1513 if ((LOCAL->buf[0] != ';') \|\| (LOCAL->buf[13] != '-')) {
yuuji@0	1514 LOCAL->buf[14] = '\0'; /* tie off buffer for error message */
yuuji@0	1515 sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
yuuji@0	1516 elt->msgno,elt->private.special.offset,
yuuji@0	1517 elt->private.special.text.size,(char *) LOCAL->buf);
yuuji@0	1518 fatal (LOCAL->buf+50);
yuuji@0	1519 }
yuuji@0	1520 LOCAL->buf[13] = '\0'; /* tie off buffer */
yuuji@0	1521 /* calculate system flags */
yuuji@0	1522 i = strtoul (LOCAL->buf+9,NIL,16);
yuuji@0	1523 elt->seen = i & fSEEN ? T : NIL;
yuuji@0	1524 elt->deleted = i & fDELETED ? T : NIL;
yuuji@0	1525 elt->flagged = i & fFLAGGED ? T : NIL;
yuuji@0	1526 elt->answered = i & fANSWERED ? T : NIL;
yuuji@0	1527 elt->draft = i & fDRAFT ? T : NIL;
yuuji@0	1528 LOCAL->expunged \|= i & fEXPUNGED ? T : NIL;
yuuji@0	1529 LOCAL->buf[9] = '\0'; /* tie off flags */
yuuji@0	1530 /* get user flags value */
yuuji@0	1531 elt->user_flags = strtoul (LOCAL->buf+1,NIL,16);
yuuji@0	1532 elt->valid = T; /* have valid flags now */
yuuji@0	1533 return i & fEXPUNGED;
yuuji@0	1534 }
yuuji@0	1535
yuuji@0	1536 /* MBX update header
yuuji@0	1537 * Accepts: MAIL stream
yuuji@0	1538 */
yuuji@0	1539
yuuji@0	1540 #ifndef CYGKLUDGEOFFSET
yuuji@0	1541 #define CYGKLUDGEOFFSET 0
yuuji@0	1542 #endif
yuuji@0	1543
yuuji@0	1544 void mbx_update_header (MAILSTREAM *stream)
yuuji@0	1545 {
yuuji@0	1546 int i;
yuuji@0	1547 char *s = LOCAL->buf;
yuuji@0	1548 memset (s,'\0',HDRSIZE); /* initialize header */
yuuji@0	1549 sprintf (s,"mbx\015\012%08lx%08lx\015\012",
yuuji@0	1550 stream->uid_validity,stream->uid_last);
yuuji@0	1551 for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; ++i)
yuuji@0	1552 sprintf (s += strlen (s),"%s\015\012",stream->user_flags[i]);
yuuji@0	1553 LOCAL->ffuserflag = i; /* first free user flag */
yuuji@0	1554 /* can we create more user flags? */
yuuji@0	1555 stream->kwd_create = (i < NUSERFLAGS) ? T : NIL;
yuuji@0	1556 /* write reserved lines */
yuuji@0	1557 while (i++ < NUSERFLAGS) strcat (s,"\015\012");
yuuji@0	1558 sprintf (LOCAL->buf + HDRSIZE - 10,"%08lx\015\012",LOCAL->lastpid);
yuuji@0	1559 while (T) { /* rewind file */
yuuji@0	1560 lseek (LOCAL->fd,CYGKLUDGEOFFSET,L_SET);
yuuji@0	1561 /* write new header */
yuuji@0	1562 if (write (LOCAL->fd,LOCAL->buf + CYGKLUDGEOFFSET,
yuuji@0	1563 HDRSIZE - CYGKLUDGEOFFSET) > 0) break;
yuuji@0	1564 MM_NOTIFY (stream,strerror (errno),WARN);
yuuji@0	1565 MM_DISKERROR (stream,errno,T);
yuuji@0	1566 }
yuuji@0	1567 }
yuuji@0	1568
yuuji@0	1569 /* MBX update status string
yuuji@0	1570 * Accepts: MAIL stream
yuuji@0	1571 * message number
yuuji@0	1572 * flags
yuuji@0	1573 */
yuuji@0	1574
yuuji@0	1575 void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags)
yuuji@0	1576 {
yuuji@0	1577 struct stat sbuf;
yuuji@0	1578 MESSAGECACHE *elt = mail_elt (stream,msgno);
yuuji@0	1579 /* readonly */
yuuji@0	1580 if (stream->rdonly \|\| !elt->valid) mbx_read_flags (stream,elt);
yuuji@0	1581 else { /* readwrite */
yuuji@0	1582 fstat (LOCAL->fd,&sbuf); /* get status */
yuuji@0	1583 /* make sure file size is good */
yuuji@0	1584 if (sbuf.st_size < LOCAL->filesize) {
yuuji@0	1585 sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag update!",
yuuji@0	1586 (unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
yuuji@0	1587 fatal (LOCAL->buf);
yuuji@0	1588 }
yuuji@0	1589 /* set the seek pointer */
yuuji@0	1590 lseek (LOCAL->fd,(off_t) elt->private.special.offset +
yuuji@0	1591 elt->private.special.text.size - 24,L_SET);
yuuji@0	1592 /* read the new flags */
yuuji@0	1593 if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
yuuji@0	1594 sprintf (LOCAL->buf,"Unable to read old status: %s",strerror (errno));
yuuji@0	1595 fatal (LOCAL->buf);
yuuji@0	1596 }
yuuji@0	1597 if ((LOCAL->buf[0] != ';') \|\| (LOCAL->buf[13] != '-')) {
yuuji@0	1598 LOCAL->buf[14] = '\0'; /* tie off buffer for error message */
yuuji@0	1599 sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
yuuji@0	1600 elt->msgno,elt->private.special.offset,
yuuji@0	1601 elt->private.special.text.size,(char *) LOCAL->buf);
yuuji@0	1602 fatal (LOCAL->buf+50);
yuuji@0	1603 }
yuuji@0	1604 /* print new flag string */
yuuji@0	1605 sprintf (LOCAL->buf,"%08lx%04x-%08lx",elt->user_flags,(unsigned)
yuuji@0	1606 (((elt->deleted && flags) ?
yuuji@0	1607 fEXPUNGED : (strtoul (LOCAL->buf+9,NIL,16)) & fEXPUNGED) +
yuuji@0	1608 (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
yuuji@0	1609 (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
yuuji@0	1610 (fDRAFT * elt->draft) + fOLD),elt->private.uid);
yuuji@0	1611 while (T) { /* get to that place in the file */
yuuji@0	1612 lseek (LOCAL->fd,(off_t) elt->private.special.offset +
yuuji@0	1613 elt->private.special.text.size - 23,L_SET);
yuuji@0	1614 /* write new flags and UID */
yuuji@0	1615 if (write (LOCAL->fd,LOCAL->buf,21) > 0) break;
yuuji@0	1616 MM_NOTIFY (stream,strerror (errno),WARN);
yuuji@0	1617 MM_DISKERROR (stream,errno,T);
yuuji@0	1618 }
yuuji@0	1619 }
yuuji@0	1620 }
yuuji@0	1621
yuuji@0	1622 /* MBX locate header for a message
yuuji@0	1623 * Accepts: MAIL stream
yuuji@0	1624 * message number
yuuji@0	1625 * pointer to returned header size
yuuji@0	1626 * pointer to possible returned header
yuuji@0	1627 * Returns: position of header in file
yuuji@0	1628 */
yuuji@0	1629
yuuji@0	1630 #define HDRBUFLEN 16384 /* good enough for most headers */
yuuji@0	1631 #define SLOP 4 /* CR LF CR LF */
yuuji@0	1632
yuuji@0	1633 unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
yuuji@0	1634 unsigned long size,char *hdr)
yuuji@0	1635 {
yuuji@0	1636 unsigned long siz,done;
yuuji@0	1637 long i;
yuuji@0	1638 unsigned char s,t,*te;
yuuji@0	1639 MESSAGECACHE *elt = mail_elt (stream,msgno);
yuuji@0	1640 unsigned long ret = elt->private.special.offset +
yuuji@0	1641 elt->private.special.text.size;
yuuji@0	1642 if (hdr) hdr = NIL; / assume no header returned */
yuuji@0	1643 /* is header size known? */
yuuji@0	1644 if (*size = elt->private.msg.header.text.size) return ret;
yuuji@0	1645 /* paranoia check */
yuuji@0	1646 if (LOCAL->buflen < (HDRBUFLEN + SLOP))
yuuji@0	1647 fatal ("LOCAL->buf smaller than HDRBUFLEN");
yuuji@0	1648 lseek (LOCAL->fd,ret,L_SET); /* get to header position */
yuuji@0	1649 /* read HDRBUFLEN chunks with 4 byte slop */
yuuji@0	1650 for (done = siz = 0, s = LOCAL->buf;
yuuji@0	1651 (i = min ((long) (elt->rfc822_size - done),(long) HDRBUFLEN)) &&
yuuji@0	1652 (read (LOCAL->fd,s,i) == i);
yuuji@0	1653 done += i, siz += (t - LOCAL->buf) - SLOP, s = LOCAL->buf + SLOP) {
yuuji@0	1654 te = (t = s + i) - 12; /* calculate end of fast scan */
yuuji@0	1655 /* fast scan for CR */
yuuji@0	1656 for (s = LOCAL->buf; s < te;)
yuuji@0	1657 if (((s++ == '\015') \|\| (s++ == '\015') \|\| (*s++ == '\015') \|\|
yuuji@0	1658 (s++ == '\015') \|\| (s++ == '\015') \|\| (*s++ == '\015') \|\|
yuuji@0	1659 (s++ == '\015') \|\| (s++ == '\015') \|\| (*s++ == '\015') \|\|
yuuji@0	1660 (s++ == '\015') \|\| (s++ == '\015') \|\| (*s++ == '\015')) &&
yuuji@0	1661 (s == '\012') && (++s == '\015') && (*++s == '\012')) {
yuuji@0	1662 *size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
yuuji@0	1663 if (hdr) *hdr = LOCAL->buf;
yuuji@0	1664 return ret;
yuuji@0	1665 }
yuuji@0	1666 for (te = t - 3; (s < te);) /* final character-at-a-time scan */
yuuji@0	1667 if ((s++ == '\015') && (s == '\012') && (*++s == '\015') &&
yuuji@0	1668 (*++s == '\012')) {
yuuji@0	1669 *size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
yuuji@0	1670 if (hdr) *hdr = LOCAL->buf;
yuuji@0	1671 return ret;
yuuji@0	1672 }
yuuji@0	1673 if (i <= SLOP) break; /* end of data */
yuuji@0	1674 /* slide over last 4 bytes */
yuuji@0	1675 memmove (LOCAL->buf,t - SLOP,SLOP);
yuuji@0	1676 hdr = NIL; /* can't return header this way */
yuuji@0	1677 }
yuuji@0	1678 /* not found: header consumes entire message */
yuuji@0	1679 elt->private.msg.header.text.size = *size = elt->rfc822_size;
yuuji@0	1680 if (hdr) hdr = LOCAL->buf; / possibly return header too */
yuuji@0	1681 return ret;
yuuji@0	1682 }
yuuji@0	1683
yuuji@0	1684 /* MBX mail rewrite mailbox
yuuji@0	1685 * Accepts: MAIL stream
yuuji@0	1686 * pointer to return reclaimed size
yuuji@0	1687 * flags (0 = no expunge, 1 = expunge deleted, -1 = expunge sequence)
yuuji@0	1688 * Returns: number of expunged messages
yuuji@0	1689 */
yuuji@0	1690
yuuji@0	1691 unsigned long mbx_rewrite (MAILSTREAM stream,unsigned long reclaimed,
yuuji@0	1692 long flags)
yuuji@0	1693 {
yuuji@0	1694 time_t tp[2];
yuuji@0	1695 struct stat sbuf;
yuuji@0	1696 off_t pos,ppos;
yuuji@0	1697 int ld;
yuuji@0	1698 unsigned long i,j,k,m,delta;
yuuji@0	1699 unsigned long n = *reclaimed = 0;
yuuji@0	1700 unsigned long recent = 0;
yuuji@0	1701 char lock[MAILTMPLEN];
yuuji@0	1702 MESSAGECACHE *elt;
yuuji@0	1703 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
yuuji@0	1704 /* The cretins who designed flock() created a window of vulnerability in
yuuji@0	1705 * upgrading locks from shared to exclusive or downgrading from exclusive
yuuji@0	1706 * to shared. Rather than maintain the lock at shared status at a minimum,
yuuji@0	1707 * flock() actually releases the former lock. Obviously they never talked
yuuji@0	1708 * to any database guys. Fortunately, we have the parse/append permission
yuuji@0	1709 * lock. If we require this lock before going exclusive on the mailbox,
yuuji@0	1710 * another process can not sneak in and steal the exclusive mailbox lock on
yuuji@0	1711 * us, because it will block on trying to get parse/append permission first.
yuuji@0	1712 */
yuuji@0	1713 /* get parse/append permission */
yuuji@0	1714 if ((ld = lockfd (LOCAL->fd,lock,LOCK_EX)) < 0) {
yuuji@0	1715 MM_LOG ("Unable to lock mailbox for rewrite",ERROR);
yuuji@0	1716 return 0;
yuuji@0	1717 }
yuuji@0	1718 fstat (LOCAL->fd,&sbuf); /* get current write time */
yuuji@0	1719 if (LOCAL->filetime && !LOCAL->flagcheck &&
yuuji@0	1720 (LOCAL->filetime < sbuf.st_mtime)) LOCAL->flagcheck = T;
yuuji@0	1721 if (!mbx_parse (stream)) { /* make sure see any newly-arrived messages */
yuuji@0	1722 unlockfd (ld,lock); /* failed?? */
yuuji@0	1723 return 0;
yuuji@0	1724 }
yuuji@0	1725 if (LOCAL->flagcheck) { /* sweep flags if need flagcheck */
yuuji@0	1726 LOCAL->filetime = sbuf.st_mtime;
yuuji@0	1727 for (i = 1; i <= stream->nmsgs; ++i) mbx_elt (stream,i,NIL);
yuuji@0	1728 LOCAL->flagcheck = NIL;
yuuji@0	1729 }
yuuji@0	1730
yuuji@0	1731 /* get exclusive access */
yuuji@0	1732 if (!flock (LOCAL->fd,LOCK_EX\|LOCK_NB)) {
yuuji@0	1733 MM_CRITICAL (stream); /* go critical */
yuuji@0	1734 for (i = 1,delta = 0,pos = ppos = HDRSIZE; i <= stream->nmsgs; ) {
yuuji@0	1735 /* note if message not at predicted location */
yuuji@0	1736 if (m = (elt = mbx_elt (stream,i,NIL))->private.special.offset - ppos) {
yuuji@0	1737 ppos = elt->private.special.offset;
yuuji@0	1738 reclaimed += m; / note reclaimed message space */
yuuji@0	1739 delta += m; /* and as expunge delta */
yuuji@0	1740 }
yuuji@0	1741 /* number of bytes to smash or preserve */
yuuji@0	1742 ppos += (k = elt->private.special.text.size + elt->rfc822_size);
yuuji@0	1743 /* if need to expunge this message*/
yuuji@0	1744 if (flags && elt->deleted && ((flags > 0) \|\| elt->sequence)) {
yuuji@0	1745 delta += k; /* number of bytes to delete */
yuuji@0	1746 mail_expunged(stream,i);/* notify upper levels */
yuuji@0	1747 n++; /* count up one more expunged message */
yuuji@0	1748 }
yuuji@0	1749 else { /* preserved message */
yuuji@0	1750 i++; /* count this message */
yuuji@0	1751 if (elt->recent) ++recent;
yuuji@0	1752 if (delta) { /* moved, note first byte to preserve */
yuuji@0	1753 j = elt->private.special.offset;
yuuji@0	1754 do { /* read from source position */
yuuji@0	1755 m = min (k,LOCAL->buflen);
yuuji@0	1756 lseek (LOCAL->fd,j,L_SET);
yuuji@0	1757 read (LOCAL->fd,LOCAL->buf,m);
yuuji@0	1758 pos = j - delta; /* write to destination position */
yuuji@0	1759 while (T) {
yuuji@0	1760 lseek (LOCAL->fd,pos,L_SET);
yuuji@0	1761 if (write (LOCAL->fd,LOCAL->buf,m) > 0) break;
yuuji@0	1762 MM_NOTIFY (stream,strerror (errno),WARN);
yuuji@0	1763 MM_DISKERROR (stream,errno,T);
yuuji@0	1764 }
yuuji@0	1765 pos += m; /* new position */
yuuji@0	1766 j += m; /* next chunk, perhaps */
yuuji@0	1767 } while (k -= m); /* until done */
yuuji@0	1768 /* note the new address of this text */
yuuji@0	1769 elt->private.special.offset -= delta;
yuuji@0	1770 }
yuuji@0	1771 /* preserved but no deleted messages yet */
yuuji@0	1772 else pos = elt->private.special.offset + k;
yuuji@0	1773 }
yuuji@0	1774 }
yuuji@0	1775 /* deltaed file size match position? */
yuuji@0	1776 if (m = (LOCAL->filesize -= delta) - pos) {
yuuji@0	1777 reclaimed += m; / probably an fEXPUNGED msg */
yuuji@0	1778 LOCAL->filesize = pos; /* set correct size */
yuuji@0	1779 }
yuuji@0	1780 /* truncate file after last message */
yuuji@0	1781 ftruncate (LOCAL->fd,LOCAL->filesize);
yuuji@0	1782 fsync (LOCAL->fd); /* force disk update */
yuuji@0	1783 MM_NOCRITICAL (stream); /* release critical */
yuuji@0	1784 (*bn) (BLOCK_FILELOCK,NIL);
yuuji@0	1785 flock (LOCAL->fd,LOCK_SH); /* allow sharers again */
yuuji@0	1786 (*bn) (BLOCK_NONE,NIL);
yuuji@0	1787 }
yuuji@0	1788
yuuji@0	1789 else { /* can't get exclusive */
yuuji@0	1790 (*bn) (BLOCK_FILELOCK,NIL);
yuuji@0	1791 flock (LOCAL->fd,LOCK_SH); /* recover previous shared mailbox lock */
yuuji@0	1792 (*bn) (BLOCK_NONE,NIL);
yuuji@0	1793 /* do hide-expunge when shared */
yuuji@0	1794 if (flags) for (i = 1; i <= stream->nmsgs; ) {
yuuji@0	1795 if (elt = mbx_elt (stream,i,T)) {
yuuji@0	1796 /* make the message invisible */
yuuji@0	1797 if (elt->deleted && ((flags > 0) \|\| elt->sequence)) {
yuuji@0	1798 mbx_update_status (stream,elt->msgno,LONGT);
yuuji@0	1799 /* notify upper levels */
yuuji@0	1800 mail_expunged (stream,i);
yuuji@0	1801 n++; /* count up one more expunged message */
yuuji@0	1802 }
yuuji@0	1803 else {
yuuji@0	1804 i++; /* preserved message */
yuuji@0	1805 if (elt->recent) ++recent;
yuuji@0	1806 }
yuuji@0	1807 }
yuuji@0	1808 else n++; /* count up one more expunged message */
yuuji@0	1809 }
yuuji@0	1810 fsync (LOCAL->fd); /* force disk update */
yuuji@0	1811 }
yuuji@0	1812 fstat (LOCAL->fd,&sbuf); /* get new write time */
yuuji@0	1813 tp[1] = LOCAL->filetime = sbuf.st_mtime;
yuuji@0	1814 tp[0] = time (0); /* reset atime to now */
yuuji@0	1815 utime (stream->mailbox,tp);
yuuji@0	1816 unlockfd (ld,lock); /* release exclusive parse/append permission */
yuuji@0	1817 /* notify upper level of new mailbox size */
yuuji@0	1818 mail_exists (stream,stream->nmsgs);
yuuji@0	1819 mail_recent (stream,recent);
yuuji@0	1820 return n; /* return number of expunged messages */
yuuji@0	1821 }
yuuji@0	1822
yuuji@0	1823 /* MBX mail lock for flag updating
yuuji@0	1824 * Accepts: stream
yuuji@0	1825 * Returns: T if successful, NIL if failure
yuuji@0	1826 */
yuuji@0	1827
yuuji@0	1828 long mbx_flaglock (MAILSTREAM *stream)
yuuji@0	1829 {
yuuji@0	1830 struct stat sbuf;
yuuji@0	1831 unsigned long i;
yuuji@0	1832 int ld;
yuuji@0	1833 char lock[MAILTMPLEN];
yuuji@0	1834 /* no-op if readonly or already locked */
yuuji@0	1835 if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld < 0)) {
yuuji@0	1836 /* lock now */
yuuji@0	1837 if ((ld = lockfd (LOCAL->fd,lock,LOCK_EX)) < 0) return NIL;
yuuji@0	1838 if (!LOCAL->flagcheck) { /* don't do this if flagcheck already needed */
yuuji@0	1839 if (LOCAL->filetime) { /* know previous time? */
yuuji@0	1840 fstat (LOCAL->fd,&sbuf);/* get current write time */
yuuji@0	1841 if (LOCAL->filetime < sbuf.st_mtime) LOCAL->flagcheck = T;
yuuji@0	1842 LOCAL->filetime = 0; /* don't do this test for any other messages */
yuuji@0	1843 }
yuuji@0	1844 if (!mbx_parse (stream)) {/* parse mailbox */
yuuji@0	1845 unlockfd (ld,lock); /* shouldn't happen */
yuuji@0	1846 return NIL;
yuuji@0	1847 }
yuuji@0	1848 if (LOCAL->flagcheck) /* invalidate cache if flagcheck */
yuuji@0	1849 for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->valid = NIL;
yuuji@0	1850 }
yuuji@0	1851 LOCAL->ld = ld; /* copy to stream for subsequent calls */
yuuji@0	1852 memcpy (LOCAL->lock,lock,MAILTMPLEN);
yuuji@0	1853 }
yuuji@0	1854 return LONGT;
yuuji@0	1855 }