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/* ========================================================================
* Copyright 1988-2008 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* ========================================================================
*/
/*
* Program: MIX mail routines
*
* Author(s): Mark Crispin
* UW Technology
* University of Washington
* Seattle, WA 98195
* Internet: MRC@Washington.EDU
*
* Date: 1 March 2006
* Last Edited: 7 May 2008
*/
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
extern int errno; /* just in case */
#include "mail.h"
#include "osdep.h"
#include <pwd.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "misc.h"
#include "dummy.h"
#include "fdstring.h"
/* MIX definitions */
#define MEGABYTE (1024*1024)
#define MIXDATAROLL MEGABYTE /* size at which we roll to a new file */
/* MIX files */
#define MIXNAME ".mix" /* prefix for all MIX file names */
#define MIXMETA "meta" /* suffix for metadata */
#define MIXINDEX "index" /* suffix for index */
#define MIXSTATUS "status" /* suffix for status */
#define MIXSORTCACHE "sortcache"/* suffix for sortcache */
#define METAMAX (MEGABYTE-1) /* maximum metadata file size (sanity check) */
/* MIX file formats */
/* sequence format (all but msg files) */
#define SEQFMT "S%08lx\015\012"
/* metadata file format */
#define MTAFMT "V%08lx\015\012L%08lx\015\012N%08lx\015\012"
/* index file record format */
#define IXRFMT ":%08lx:%04d%02d%02d%02d%02d%02d%c%02d%02d:%08lx:%08lx:%08lx:%08lx:%08lx:\015\012"
/* status file record format */
#define STRFMT ":%08lx:%08lx:%04x:%08lx:\015\012"
/* message file header format */
#define MSRFMT "%s%08lx:%04d%02d%02d%02d%02d%02d%c%02d%02d:%08lx:\015\012"
#define MSGTOK ":msg:"
#define MSGTSZ (sizeof(MSGTOK)-1)
/* sortcache file record format */
#define SCRFMT ":%08lx:%08lx:%08lx:%08lx:%08lx:%c%08lx:%08lx:%08lx:\015\012"
/* MIX I/O stream local data */
typedef struct mix_local {
unsigned long curmsg; /* current message file number */
unsigned long newmsg; /* current new message file number */
time_t lastsnarf; /* last snarf time */
int msgfd; /* file description of current msg file */
int mfd; /* file descriptor of open metadata */
unsigned long metaseq; /* metadata sequence */
char *index; /* mailbox index name */
unsigned long indexseq; /* index sequence */
char *status; /* mailbox status name */
unsigned long statusseq; /* status sequence */
char *sortcache; /* mailbox sortcache name */
unsigned long sortcacheseq; /* sortcache sequence */
unsigned char *buf; /* temporary buffer */
unsigned long buflen; /* current size of temporary buffer */
unsigned int expok : 1; /* non-zero if expunge reports OK */
unsigned int internal : 1; /* internally opened, do not validate */
} MIXLOCAL;
#define MIXBURP struct mix_burp
MIXBURP {
unsigned long fileno; /* message file number */
char *name; /* message file name */
SEARCHSET *tail; /* tail of ranges */
SEARCHSET set; /* set of retained ranges */
MIXBURP *next; /* next file to burp */
};
/* Convenient access to local data */
#define LOCAL ((MIXLOCAL *) stream->local)
/* Function prototypes */
DRIVER *mix_valid (char *name);
long mix_isvalid (char *name,char *meta);
void *mix_parameters (long function,void *value);
long mix_dirfmttest (char *name);
void mix_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
long mix_scan_contents (char *name,char *contents,unsigned long csiz,
unsigned long fsiz);
void mix_list (MAILSTREAM *stream,char *ref,char *pat);
void mix_lsub (MAILSTREAM *stream,char *ref,char *pat);
long mix_subscribe (MAILSTREAM *stream,char *mailbox);
long mix_unsubscribe (MAILSTREAM *stream,char *mailbox);
long mix_create (MAILSTREAM *stream,char *mailbox);
long mix_delete (MAILSTREAM *stream,char *mailbox);
long mix_rename (MAILSTREAM *stream,char *old,char *newname);
int mix_rselect (struct direct *name);
MAILSTREAM *mix_open (MAILSTREAM *stream);
void mix_close (MAILSTREAM *stream,long options);
void mix_abort (MAILSTREAM *stream);
char *mix_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
long flags);
long mix_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
void mix_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
unsigned long *mix_sort (MAILSTREAM *stream,char *charset,SEARCHPGM *spg,
SORTPGM *pgm,long flags);
THREADNODE *mix_thread (MAILSTREAM *stream,char *type,char *charset,
SEARCHPGM *spg,long flags);
long mix_ping (MAILSTREAM *stream);
void mix_check (MAILSTREAM *stream);
long mix_expunge (MAILSTREAM *stream,char *sequence,long options);
int mix_select (struct direct *name);
int mix_msgfsort (const void *d1,const void *d2);
long mix_addset (SEARCHSET **set,unsigned long start,unsigned long size);
long mix_burp (MAILSTREAM *stream,MIXBURP *burp,unsigned long *reclaimed);
long mix_burp_check (SEARCHSET *set,size_t size,char *file);
long mix_copy (MAILSTREAM *stream,char *sequence,char *mailbox,
long options);
long mix_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
long mix_append_msg (MAILSTREAM *stream,FILE *f,char *flags,MESSAGECACHE *delt,
STRING *msg,SEARCHSET *set,unsigned long seq);
FILE *mix_parse (MAILSTREAM *stream,FILE **idxf,long iflags,long sflags);
char *mix_meta_slurp (MAILSTREAM *stream,unsigned long *seq);
long mix_meta_update (MAILSTREAM *stream);
long mix_index_update (MAILSTREAM *stream,FILE *idxf,long flag);
long mix_status_update (MAILSTREAM *stream,FILE *statf,long flag);
FILE *mix_data_open (MAILSTREAM *stream,int *fd,long *size,
unsigned long newsize);
FILE *mix_sortcache_open (MAILSTREAM *stream);
long mix_sortcache_update (MAILSTREAM *stream,FILE **sortcache);
char *mix_read_record (FILE *f,char *buf,unsigned long buflen,char *type);
unsigned long mix_read_sequence (FILE *f);
char *mix_dir (char *dst,char *name);
char *mix_file (char *dst,char *dir,char *name);
char *mix_file_data (char *dst,char *dir,unsigned long data);
unsigned long mix_modseq (unsigned long oldseq);
/* MIX mail routines */
/* Driver dispatch used by MAIL */
DRIVER mixdriver = {
"mix", /* driver name */
/* driver flags */
DR_MAIL|DR_LOCAL|DR_NOFAST|DR_CRLF|DR_LOCKING|DR_DIRFMT|DR_MODSEQ,
(DRIVER *) NIL, /* next driver */
mix_valid, /* mailbox is valid for us */
mix_parameters, /* manipulate parameters */
mix_scan, /* scan mailboxes */
mix_list, /* find mailboxes */
mix_lsub, /* find subscribed mailboxes */
mix_subscribe, /* subscribe to mailbox */
mix_unsubscribe, /* unsubscribe from mailbox */
mix_create, /* create mailbox */
mix_delete, /* delete mailbox */
mix_rename, /* rename mailbox */
mail_status_default, /* status of mailbox */
mix_open, /* open mailbox */
mix_close, /* close mailbox */
NIL, /* fetch message "fast" attributes */
NIL, /* fetch message flags */
NIL, /* fetch overview */
NIL, /* fetch message envelopes */
mix_header, /* fetch message header only */
mix_text, /* fetch message body only */
NIL, /* fetch partial message test */
NIL, /* unique identifier */
NIL, /* message number */
mix_flag, /* modify flags */
NIL, /* per-message modify flags */
NIL, /* search for message based on criteria */
mix_sort, /* sort messages */
mix_thread, /* thread messages */
mix_ping, /* ping mailbox to see if still alive */
mix_check, /* check for new messages */
mix_expunge, /* expunge deleted messages */
mix_copy, /* copy messages to another mailbox */
mix_append, /* append string message to mailbox */
NIL /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM mixproto = {&mixdriver};
/* MIX mail validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *mix_valid (char *name)
{
char tmp[MAILTMPLEN];
return mix_isvalid (name,tmp) ? &mixdriver : NIL;
}
/* MIX mail test for valid mailbox
* Accepts: mailbox name
* buffer to return meta name
* Returns: T if valid, NIL otherwise, metadata name written in both cases
*/
long mix_isvalid (char *name,char *meta)
{
char dir[MAILTMPLEN];
struct stat sbuf;
/* validate name as directory */
if (!(errno = ((strlen (name) > NETMAXMBX) ? ENAMETOOLONG : NIL)) &&
*mix_dir (dir,name) && mix_file (meta,dir,MIXMETA) &&
!stat (dir,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) {
/* name is directory; is it mix? */
if (!stat (meta,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFREG))
return LONGT;
else errno = NIL; /* directory but not mix */
}
return NIL;
}
/* MIX manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *mix_parameters (long function,void *value)
{
void *ret = NIL;
switch ((int) function) {
case GET_INBOXPATH:
if (value) ret = mailboxfile ((char *) value,"~/INBOX");
break;
case GET_DIRFMTTEST:
ret = (void *) mix_dirfmttest;
break;
case GET_SCANCONTENTS:
ret = (void *) mix_scan_contents;
break;
case SET_ONETIMEEXPUNGEATPING:
if (value) ((MIXLOCAL *) ((MAILSTREAM *) value)->local)->expok = T;
case GET_ONETIMEEXPUNGEATPING:
if (value) ret = (void *)
(((MIXLOCAL *) ((MAILSTREAM *) value)->local)->expok ? VOIDT : NIL);
break;
}
return ret;
}
/* MIX test for directory format internal node
* Accepts: candidate node name
* Returns: T if internal name, NIL otherwise
*/
long mix_dirfmttest (char *name)
{
/* belongs to MIX if starts with .mix */
return strncmp (name,MIXNAME,sizeof (MIXNAME) - 1) ? NIL : LONGT;
}
/* MIX mail scan mailboxes
* Accepts: mail stream
* reference
* pattern to search
* string to scan
*/
void mix_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
if (stream) dummy_scan (NIL,ref,pat,contents);
}
/* MIX scan mailbox for contents
* Accepts: mailbox name
* desired contents
* contents size
* file size (ignored)
* Returns: NIL if contents not found, T if found
*/
long mix_scan_contents (char *name,char *contents,unsigned long csiz,
unsigned long fsiz)
{
long i,nfiles;
void *a;
char *s;
long ret = NIL;
size_t namelen = strlen (name);
struct stat sbuf;
struct direct **names = NIL;
if ((nfiles = scandir (name,&names,mix_select,mix_msgfsort)) > 0)
for (i = 0; i < nfiles; ++i) {
if (!ret) {
sprintf (s = (char *) fs_get (namelen + strlen (names[i]->d_name) + 2),
"%s/%s",name,names[i]->d_name);
if (!stat (s,&sbuf) && (csiz <= sbuf.st_size))
ret = dummy_scan_contents (s,contents,csiz,sbuf.st_size);
fs_give ((void **) &s);
}
fs_give ((void **) &names[i]);
}
/* free directory list */
if (a = (void *) names) fs_give ((void **) &a);
return ret;
}
/* MIX list mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mix_list (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_list (NIL,ref,pat);
}
/* MIX list subscribed mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mix_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_lsub (NIL,ref,pat);
}
/* MIX mail subscribe to mailbox
* Accepts: mail stream
* mailbox to add to subscription list
* Returns: T on success, NIL on failure
*/
long mix_subscribe (MAILSTREAM *stream,char *mailbox)
{
return sm_subscribe (mailbox);
}
/* MIX mail unsubscribe to mailbox
* Accepts: mail stream
* mailbox to delete from subscription list
* Returns: T on success, NIL on failure
*/
long mix_unsubscribe (MAILSTREAM *stream,char *mailbox)
{
return sm_unsubscribe (mailbox);
}
/* MIX mail create mailbox
* Accepts: mail stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long mix_create (MAILSTREAM *stream,char *mailbox)
{
DRIVER *test;
FILE *f;
int c,i;
char *t,tmp[MAILTMPLEN],file[MAILTMPLEN];
char *s = strrchr (mailbox,'/');
unsigned long now = time (NIL);
long ret = NIL;
/* always create \NoSelect if trailing / */
if (s && !s[1]) return dummy_create (stream,mailbox);
/* validate name */
if (mix_dirfmttest (s ? s + 1 : mailbox))
sprintf(tmp,"Can't create mailbox %.80s: invalid MIX-format name",mailbox);
/* must not already exist */
else if ((test = mail_valid (NIL,mailbox,NIL)) &&
strcmp (test->name,"dummy"))
sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox);
/* create directory and metadata */
else if (!dummy_create_path (stream,
mix_file (file,mix_dir (tmp,mailbox),MIXMETA),
get_dir_protection (mailbox)))
sprintf (tmp,"Can't create mailbox %.80s: %.80s",mailbox,strerror (errno));
else if (!(f = fopen (file,"w")))
sprintf (tmp,"Can't re-open metadata %.80s: %.80s",mailbox,
strerror (errno));
else { /* success, write initial metadata */
fprintf (f,SEQFMT,now);
fprintf (f,MTAFMT,now,0,now);
for (i = 0, c = 'K'; (i < NUSERFLAGS) &&
(t = (stream && stream->user_flags[i]) ? stream->user_flags[i] :
default_user_flag (i)) && *t; ++i) {
putc (c,f); /* write another keyword */
fputs (t,f);
c = ' '; /* delimiter is now space */
}
fclose (f);
set_mbx_protections (mailbox,file);
/* point to suffix */
s = file + strlen (file) - (sizeof (MIXMETA) - 1);
strcpy (s,MIXINDEX); /* create index */
if (!dummy_create_path (stream,file,get_dir_protection (mailbox)))
sprintf (tmp,"Can't create mix mailbox index: %.80s",strerror (errno));
else {
set_mbx_protections (mailbox,file);
strcpy (s,MIXSTATUS); /* create status */
if (!dummy_create_path (stream,file,get_dir_protection (mailbox)))
sprintf (tmp,"Can't create mix mailbox status: %.80s",
strerror (errno));
else {
set_mbx_protections (mailbox,file);
sprintf (s,"%08lx",now);/* message file */
if (!dummy_create_path (stream,file,get_dir_protection (mailbox)))
sprintf (tmp,"Can't create mix mailbox data: %.80s",
strerror (errno));
else {
set_mbx_protections (mailbox,file);
ret = LONGT; /* declare success at this point */
}
}
}
}
if (!ret) MM_LOG (tmp,ERROR); /* some error */
return ret;
}
/* MIX mail delete mailbox
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long mix_delete (MAILSTREAM *stream,char *mailbox)
{
DIR *dirp;
struct direct *d;
int fd = -1;
char *s,tmp[MAILTMPLEN];
if (!mix_isvalid (mailbox,tmp))
sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox);
else if (((fd = open (tmp,O_RDWR,NIL)) < 0) || flock (fd,LOCK_EX|LOCK_NB))
sprintf (tmp,"Can't lock mailbox for delete: %.80s",mailbox);
/* delete metadata */
else if (unlink (tmp)) sprintf (tmp,"Can't delete mailbox %.80s index: %80s",
mailbox,strerror (errno));
else {
close (fd); /* close descriptor on deleted metadata */
/* get directory name */
*(s = strrchr (tmp,'/')) = '\0';
if (dirp = opendir (tmp)) { /* open directory */
*s++ = '/'; /* restore delimiter */
/* massacre messages */
while (d = readdir (dirp)) if (mix_dirfmttest (d->d_name)) {
strcpy (s,d->d_name); /* make path */
unlink (tmp); /* sayonara */
}
closedir (dirp); /* flush directory */
*(s = strrchr (tmp,'/')) = '\0';
if (rmdir (tmp)) { /* try to remove the directory */
sprintf (tmp,"Can't delete name %.80s: %.80s",
mailbox,strerror (errno));
MM_LOG (tmp,WARN);
}
}
return T; /* always success */
}
if (fd >= 0) close (fd); /* close any descriptor on metadata */
MM_LOG (tmp,ERROR); /* something failed */
return NIL;
}
/* MIX mail rename mailbox
* Accepts: MIX mail stream
* old mailbox name
* new mailbox name
* Returns: T on success, NIL on failure
*/
long mix_rename (MAILSTREAM *stream,char *old,char *newname)
{
char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN];
struct stat sbuf;
int fd = -1;
if (!mix_isvalid (old,tmp))
sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old);
else if (((fd = open (tmp,O_RDWR,NIL)) < 0) || flock (fd,LOCK_EX|LOCK_NB))
sprintf (tmp,"Can't lock mailbox for rename: %.80s",old);
else if (mix_dirfmttest ((s = strrchr (newname,'/')) ? s + 1 : newname))
sprintf (tmp,"Can't rename to mailbox %.80s: invalid MIX-format name",
newname);
/* new mailbox name must not be valid */
else if (mix_isvalid (newname,tmp))
sprintf (tmp,"Can't rename to mailbox %.80s: destination already exists",
newname);
else {
mix_dir (tmp,old); /* build old directory name */
mix_dir (tmp1,newname); /* and new directory name */
/* easy if not INBOX */
if (compare_cstring (old,"INBOX")) {
/* found superior to destination name? */
if (s = strrchr (tmp1,'/')) {
c = *++s; /* remember first character of inferior */
*s = '\0'; /* tie off to get just superior */
/* name doesn't exist, create it */
if ((stat (tmp1,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
!dummy_create_path (stream,tmp1,get_dir_protection (newname)))
return NIL;
*s = c; /* restore full name */
}
if (!rename (tmp,tmp1)) {
close (fd); /* close descriptor on metadata */
return LONGT;
}
}
/* RFC 3501 requires this */
else if (dummy_create_path (stream,strcat (tmp1,"/"),
get_dir_protection (newname))) {
void *a;
int i,n,lasterror;
char *src,*dst;
struct direct **names = NIL;
size_t srcl = strlen (tmp);
size_t dstl = strlen (tmp1);
/* rename each mix file to new directory */
for (i = lasterror = 0,n = scandir (tmp,&names,mix_rselect,alphasort);
i < n; ++i) {
size_t len = strlen (names[i]->d_name);
sprintf (src = (char *) fs_get (srcl + len + 2),"%s/%s",
tmp,names[i]->d_name);
sprintf (dst = (char *) fs_get (dstl + len + 1),"%s%s",
tmp1,names[i]->d_name);
if (rename (src,dst)) lasterror = errno;
fs_give ((void **) &src);
fs_give ((void **) &dst);
fs_give ((void **) &names[i]);
}
/* free directory list */
if (a = (void *) names) fs_give ((void **) &a);
if (lasterror) errno = lasterror;
else {
close (fd); /* close descriptor on metadata */
return mix_create (NIL,"INBOX");
}
}
sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %.80s",
old,newname,strerror (errno));
}
if (fd >= 0) close (fd); /* close any descriptor on metadata */
MM_LOG (tmp,ERROR); /* something failed */
return NIL;
}
/* MIX test for mix name
* Accepts: candidate directory name
* Returns: T if mix file name, NIL otherwise
*/
int mix_rselect (struct direct *name)
{
return mix_dirfmttest (name->d_name);
}
/* MIX mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *mix_open (MAILSTREAM *stream)
{
short silent;
/* return prototype for OP_PROTOTYPE call */
if (!stream) return user_flags (&mixproto);
if (stream->local) fatal ("mix recycle stream");
stream->local = memset (fs_get (sizeof (MIXLOCAL)),0,sizeof (MIXLOCAL));
/* note if an INBOX or not */
stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
/* make temporary buffer */
LOCAL->buf = (char *) fs_get (CHUNKSIZE);
LOCAL->buflen = CHUNKSIZE - 1;
/* set stream->mailbox to be directory name */
mix_dir (LOCAL->buf,stream->mailbox);
fs_give ((void **) &stream->mailbox);
stream->mailbox = cpystr (LOCAL->buf);
LOCAL->msgfd = -1; /* currently no file open */
if (!(((!stream->rdonly && /* open metadata file */
((LOCAL->mfd = open (mix_file (LOCAL->buf,stream->mailbox,MIXMETA),
O_RDWR,NIL)) >= 0)) ||
((stream->rdonly = T) &&
((LOCAL->mfd = open (mix_file (LOCAL->buf,stream->mailbox,MIXMETA),
O_RDONLY,NIL)) >= 0))) &&
!flock (LOCAL->mfd,LOCK_SH))) {
MM_LOG ("Error opening mix metadata file",ERROR);
mix_abort (stream);
stream = NIL; /* open fails */
}
else { /* metadata open, complete open */
LOCAL->index = cpystr (mix_file (LOCAL->buf,stream->mailbox,MIXINDEX));
LOCAL->status = cpystr (mix_file (LOCAL->buf,stream->mailbox,MIXSTATUS));
LOCAL->sortcache = cpystr (mix_file (LOCAL->buf,stream->mailbox,
MIXSORTCACHE));
stream->sequence++; /* bump sequence number */
/* parse mailbox */
stream->nmsgs = stream->recent = 0;
if (silent = stream->silent) LOCAL->internal = T;
stream->silent = T;
if (mix_ping (stream)) { /* do initial ping */
/* try burping in case we are exclusive */
if (!stream->rdonly) mix_expunge (stream,"",NIL);
if (!(stream->nmsgs || stream->silent))
MM_LOG ("Mailbox is empty",(long) NIL);
stream->silent = silent; /* now notify upper level */
mail_exists (stream,stream->nmsgs);
stream->perm_seen = stream->perm_deleted = stream->perm_flagged =
stream->perm_answered = stream->perm_draft = stream->rdonly ? NIL : T;
stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
stream->kwd_create = /* can we create new user flags? */
(stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ? NIL : T;
}
else { /* got murdelyzed in ping */
mix_abort (stream);
stream = NIL;
}
}
return stream; /* return stream to caller */
}
/* MIX mail close
* Accepts: MAIL stream
* close options
*/
void mix_close (MAILSTREAM *stream,long options)
{
if (LOCAL) { /* only if a file is open */
int silent = stream->silent;
stream->silent = T; /* note this stream is dying */
/* burp-only or expunge */
mix_expunge (stream,(options & CL_EXPUNGE) ? NIL : "",NIL);
mix_abort (stream);
stream->silent = silent; /* reset silent state */
}
}
/* MIX mail abort stream
* Accepts: MAIL stream
*/
void mix_abort (MAILSTREAM *stream)
{
if (LOCAL) { /* only if a file is open */
/* close current message file if open */
if (LOCAL->msgfd >= 0) close (LOCAL->msgfd);
/* close current metadata file if open */
if (LOCAL->mfd >= 0) close (LOCAL->mfd);
if (LOCAL->index) fs_give ((void **) &LOCAL->index);
if (LOCAL->status) fs_give ((void **) &LOCAL->status);
if (LOCAL->sortcache) fs_give ((void **) &LOCAL->sortcache);
/* free local scratch buffer */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
/* nuke the local data */
fs_give ((void **) &stream->local);
stream->dtb = NIL; /* log out the DTB */
}
}
/* MIX mail fetch message header
* Accepts: MAIL stream
* message # to fetch
* pointer to returned header text length
* option flags
* Returns: message header in RFC822 format
*/
char *mix_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
long flags)
{
unsigned long i,j,k;
int fd;
char *s,tmp[MAILTMPLEN];
MESSAGECACHE *elt;
if (length) *length = 0; /* default return */
if (flags & FT_UID) return "";/* UID call "impossible" */
elt = mail_elt (stream,msgno);/* get elt */
/* is message in current message file? */
if ((LOCAL->msgfd < 0) || (elt->private.spare.data != LOCAL->curmsg)) {
if (LOCAL->msgfd >= 0) close (LOCAL->msgfd);
if ((LOCAL->msgfd = open (mix_file_data (LOCAL->buf,stream->mailbox,
elt->private.spare.data),
O_RDONLY,NIL)) < 0) return "";
/* got file */
LOCAL->curmsg = elt->private.spare.data;
}
lseek (LOCAL->msgfd,elt->private.special.offset,L_SET);
/* size of special data and header */
j = elt->private.msg.header.offset + elt->private.msg.header.text.size;
if (j > LOCAL->buflen) { /* is buffer big enough? */
/* no, make one that is */
fs_give ((void **) &LOCAL->buf);
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = j) + 1);
}
/* Maybe someday validate internaldate too */
/* slurp special data + header, validate */
if ((read (LOCAL->msgfd,LOCAL->buf,j) == j) &&
!strncmp (LOCAL->buf,MSGTOK,MSGTSZ) &&
(elt->private.uid == strtoul ((char *) LOCAL->buf + MSGTSZ,&s,16)) &&
(*s++ == ':') && (s = strchr (s,':')) &&
(k = strtoul (s+1,&s,16)) && (*s++ == ':') &&
(s < (char *) (LOCAL->buf + elt->private.msg.header.offset))) {
/* won, set offset and size of message */
i = elt->private.msg.header.offset;
*length = elt->private.msg.header.text.size;
if (k != elt->rfc822_size) {
sprintf (tmp,"Inconsistency in mix message size, uid=%lx (%lu != %lu)",
elt->private.uid,elt->rfc822_size,k);
MM_LOG (tmp,WARN);
}
}
else { /* document the problem */
LOCAL->buf[100] = '\0'; /* tie off buffer at no more than 100 octets */
/* or at newline, whichever is first */
if (s = strpbrk (LOCAL->buf,"\015\012")) *s = '\0';
sprintf (tmp,"Error reading mix message header, uid=%lx, s=%.0lx, h=%s",
elt->private.uid,elt->rfc822_size,LOCAL->buf);
MM_LOG (tmp,ERROR);
*length = i = j = 0; /* default to empty */
}
LOCAL->buf[j] = '\0'; /* tie off buffer at the end */
return (char *) LOCAL->buf + i;
}
/* MIX mail fetch message text (body only)
* Accepts: MAIL stream
* message # to fetch
* pointer to returned stringstruct
* option flags
* Returns: T on success, NIL on failure
*/
long mix_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
{
unsigned long i;
FDDATA d;
MESSAGECACHE *elt;
/* UID call "impossible" */
if (flags & FT_UID) return NIL;
elt = mail_elt (stream,msgno);
/* is message in current message file? */
if ((LOCAL->msgfd < 0) || (elt->private.spare.data != LOCAL->curmsg)) {
if (LOCAL->msgfd >= 0) close (LOCAL->msgfd);
if ((LOCAL->msgfd = open (mix_file_data (LOCAL->buf,stream->mailbox,
elt->private.spare.data),
O_RDONLY,NIL)) < 0) return NIL;
/* got file */
LOCAL->curmsg = elt->private.spare.data;
}
/* doing non-peek fetch? */
if (!(flags & FT_PEEK) && !elt->seen) {
FILE *idxf; /* yes, process metadata/index/status */
FILE *statf = mix_parse (stream,&idxf,NIL,LONGT);
elt->seen = T; /* mark as seen */
MM_FLAGS (stream,elt->msgno);
/* update status file if possible */
if (statf && !stream->rdonly) {
elt->private.mod = LOCAL->statusseq = mix_modseq (LOCAL->statusseq);
mix_status_update (stream,statf,NIL);
}
if (idxf) fclose (idxf); /* release index and status file */
if (statf) fclose (statf);
}
d.fd = LOCAL->msgfd; /* set up file descriptor */
/* offset of message text */
d.pos = elt->private.special.offset + elt->private.msg.header.offset +
elt->private.msg.header.text.size;
d.chunk = LOCAL->buf; /* initial buffer chunk */
d.chunksize = CHUNKSIZE; /* chunk size */
INIT (bs,fd_string,&d,elt->rfc822_size - elt->private.msg.header.text.size);
return T;
}
/* MIX mail modify flags
* Accepts: MAIL stream
* sequence
* flag(s)
* option flags
*/
void mix_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
{
MESSAGECACHE *elt;
unsigned long i,uf,ffkey;
long f;
short nf;
FILE *idxf;
FILE *statf = mix_parse (stream,&idxf,NIL,LONGT);
unsigned long seq = mix_modseq (LOCAL->statusseq);
/* find first free key */
for (ffkey = 0; (ffkey < NUSERFLAGS) && stream->user_flags[ffkey]; ++ffkey);
/* parse sequence and flags */
if (((flags & ST_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence)) &&
((f = mail_parse_flags (stream,flag,&uf)) || uf)) {
/* alter flags */
for (i = 1,nf = (flags & ST_SET) ? T : NIL; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
struct { /* old flags */
unsigned int seen : 1;
unsigned int deleted : 1;
unsigned int flagged : 1;
unsigned int answered : 1;
unsigned int draft : 1;
unsigned long user_flags;
} old;
old.seen = elt->seen; old.deleted = elt->deleted;
old.flagged = elt->flagged; old.answered = elt->answered;
old.draft = elt->draft; old.user_flags = elt->user_flags;
if (f&fSEEN) elt->seen = nf;
if (f&fDELETED) elt->deleted = nf;
if (f&fFLAGGED) elt->flagged = nf;
if (f&fANSWERED) elt->answered = nf;
if (f&fDRAFT) elt->draft = nf;
/* user flags */
if (flags & ST_SET) elt->user_flags |= uf;
else elt->user_flags &= ~uf;
if ((old.seen != elt->seen) || (old.deleted != elt->deleted) ||
(old.flagged != elt->flagged) ||
(old.answered != elt->answered) || (old.draft != elt->draft) ||
(old.user_flags != elt->user_flags)) {
if (!stream->rdonly) elt->private.mod = LOCAL->statusseq = seq;
MM_FLAGS (stream,elt->msgno);
}
}
/* update status file after change */
if (statf && (seq == LOCAL->statusseq))
mix_status_update (stream,statf,NIL);
/* update metadata if created a keyword */
if ((ffkey < NUSERFLAGS) && stream->user_flags[ffkey] &&
!mix_meta_update (stream))
MM_LOG ("Error updating mix metadata after keyword creation",ERROR);
}
if (statf) fclose (statf); /* release status file if still open */
if (idxf) fclose (idxf); /* release index file */
}
/* MIX mail sort messages
* Accepts: mail stream
* character set
* search program
* sort program
* option flags
* Returns: vector of sorted message sequences or NIL if error
*/
unsigned long *mix_sort (MAILSTREAM *stream,char *charset,SEARCHPGM *spg,
SORTPGM *pgm,long flags)
{
unsigned long *ret;
FILE *sortcache = mix_sortcache_open (stream);
ret = mail_sort_msgs (stream,charset,spg,pgm,flags);
mix_sortcache_update (stream,&sortcache);
return ret;
}
/* MIX mail thread messages
* Accepts: mail stream
* thread type
* character set
* search program
* option flags
* Returns: thread node tree or NIL if error
*/
THREADNODE *mix_thread (MAILSTREAM *stream,char *type,char *charset,
SEARCHPGM *spg,long flags)
{
THREADNODE *ret;
FILE *sortcache = mix_sortcache_open (stream);
ret = mail_thread_msgs (stream,type,charset,spg,flags,mail_sort_msgs);
mix_sortcache_update (stream,&sortcache);
return ret;
}
/* MIX mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream alive, else NIL
*/
static int snarfing = 0; /* lock against recursive snarfing */
long mix_ping (MAILSTREAM *stream)
{
FILE *idxf,*statf;
struct stat sbuf;
STRING msg;
MESSAGECACHE *elt;
int mfd,ifd,sfd;
unsigned long i,msglen;
char *message,date[MAILTMPLEN],flags[MAILTMPLEN];
MAILSTREAM *sysibx = NIL;
long ret = NIL;
long snarfok = LONGT;
/* time to snarf? */
if (stream->inbox && !stream->rdonly && !snarfing &&
(time (0) >= (LOCAL->lastsnarf +
(time_t) mail_parameters (NIL,GET_SNARFINTERVAL,NIL)))) {
appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
MM_CRITICAL (stream); /* go critical */
snarfing = T; /* don't recursively snarf */
/* disable APPENDUID/COPYUID callbacks */
mail_parameters (NIL,SET_APPENDUID,NIL);
mail_parameters (NIL,SET_COPYUID,NIL);
/* sizes match and anything in sysinbox? */
if (!stat (sysinbox (),&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFREG) &&
sbuf.st_size && (sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) &&
!sysibx->rdonly && sysibx->nmsgs) {
/* for each message in sysibx mailbox */
for (i = 1; snarfok && (i <= sysibx->nmsgs); ++i)
if (!(elt = mail_elt (sysibx,i))->deleted &&
(message = mail_fetch_message (sysibx,i,&msglen,FT_PEEK)) &&
msglen) {
mail_date (date,elt); /* make internal date string */
/* make flag string */
flags[0] = flags[1] = '\0';
if (elt->seen) strcat (flags," \\Seen");
if (elt->flagged) strcat (flags," \\Flagged");
if (elt->answered) strcat (flags," \\Answered");
if (elt->draft) strcat (flags," \\Draft");
flags[0] = '(';
strcat (flags,")");
INIT (&msg,mail_string,message,msglen);
if (snarfok = mail_append_full (stream,"INBOX",flags,date,&msg)) {
char sequence[15];
sprintf (sequence,"%lu",i);
mail_flag (sysibx,sequence,"\\Deleted",ST_SET);
}
}
/* now expunge all those messages */
if (snarfok) mail_expunge (sysibx);
else {
sprintf (LOCAL->buf,"Can't copy new mail at message: %lu",i - 1);
MM_LOG (LOCAL->buf,WARN);
}
}
if (sysibx) mail_close (sysibx);
/* reenable APPENDUID/COPYUID */
mail_parameters (NIL,SET_APPENDUID,(void *) au);
mail_parameters (NIL,SET_COPYUID,(void *) cu);
snarfing = NIL; /* no longer snarfing */
MM_NOCRITICAL (stream); /* release critical */
LOCAL->lastsnarf = time (0);/* note time of last snarf */
}
/* expunging OK if global flag set */
if (mail_parameters (NIL,GET_EXPUNGEATPING,NIL)) LOCAL->expok = T;
/* process metadata/index/status */
if (statf = mix_parse (stream,&idxf,LONGT,
(LOCAL->internal ? NIL : LONGT))) {
fclose (statf); /* just close the status file */
ret = LONGT; /* declare success */
}
if (idxf) fclose (idxf); /* release index file */
LOCAL->expok = NIL; /* expunge no longer OK */
if (!ret) mix_abort (stream); /* murdelyze stream if ping fails */
return ret;
}
/* MIX mail checkpoint mailbox (burp only)
* Accepts: MAIL stream
*/
void mix_check (MAILSTREAM *stream)
{
if (stream->rdonly) /* won't do on readonly files! */
MM_LOG ("Checkpoint ignored on readonly mailbox",NIL);
/* do burp-only expunge action */
if (mix_expunge (stream,"",NIL)) MM_LOG ("Check completed",(long) NIL);
}
/* MIX mail expunge mailbox
* Accepts: MAIL stream
* sequence to expunge if non-NIL, empty string for burp only
* expunge options
* Returns: T on success, NIL if failure
*/
long mix_expunge (MAILSTREAM *stream,char *sequence,long options)
{
FILE *idxf = NIL;
FILE *statf = NIL;
MESSAGECACHE *elt;
int ifd,sfd;
long ret;
unsigned long i;
unsigned long nexp = 0;
unsigned long reclaimed = 0;
int burponly = (sequence && !*sequence);
LOCAL->expok = T; /* expunge during ping is OK */
if (!(ret = burponly || !sequence ||
((options & EX_UID) ?
mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))) || stream->rdonly);
/* read index and open status exclusive */
else if (statf = mix_parse (stream,&idxf,LONGT,
LOCAL->internal ? NIL : LONGT)) {
/* expunge unless just burping */
if (!burponly) for (i = 1; i <= stream->nmsgs;) {
elt = mail_elt (stream,i);/* need to expunge this message? */
if (sequence ? elt->sequence : elt->deleted) {
++nexp; /* yes, make it so */
mail_expunged (stream,i);
}
else ++i; /* otherwise advance to next message */
}
/* burp if can get exclusive access */
if (!flock (LOCAL->mfd,LOCK_EX|LOCK_NB)) {
void *a;
struct direct **names = NIL;
long nfiles = scandir (stream->mailbox,&names,mix_select,mix_msgfsort);
if (nfiles > 0) { /* if have message files */
MIXBURP *burp,*cur;
/* initialize burp list */
for (i = 0, burp = cur = NIL; i < nfiles; ++i) {
MIXBURP *nxt = (MIXBURP *) memset (fs_get (sizeof (MIXBURP)),0,
sizeof (MIXBURP));
/* another file found */
if (cur) cur = cur->next = nxt;
else cur = burp = nxt;
cur->name = names[i]->d_name;
cur->fileno = strtoul (cur->name + sizeof (MIXNAME) - 1,NIL,16);
cur->tail = &cur->set;
fs_give ((void **) &names[i]);
}
/* now load ranges */
for (i = 1, cur = burp; ret && (i <= stream->nmsgs); i++) {
/* is this message in current set? */
elt = mail_elt (stream,i);
if (cur && (elt->private.spare.data != cur->fileno)) {
/* restart if necessary */
if (elt->private.spare.data < cur->fileno) cur = burp;
/* hunt for appropriate mailbox */
while (cur && (elt->private.spare.data > cur->fileno))
cur = cur->next;
/* ought to have found it now... */
if (cur && (elt->private.spare.data != cur->fileno)) cur = NIL;
}
/* if found, add to set */
if (cur) ret = mix_addset (&cur->tail,elt->private.special.offset,
elt->private.msg.header.offset +
elt->rfc822_size);
else { /* uh-oh */
sprintf (LOCAL->buf,"Can't locate mix message file %.08lx",
elt->private.spare.data);
MM_LOG (LOCAL->buf,ERROR);
ret = NIL;
}
}
if (ret) /* if no errors, burp all files */
for (cur = burp; ret && cur; cur = cur->next) {
/* if non-empty, burp it */
if (cur->set.last) ret = mix_burp (stream,cur,&reclaimed);
/* empty, delete it unless new msg file */
else if (mix_file_data (LOCAL->buf,stream->mailbox,cur->fileno) &&
((cur->fileno == LOCAL->newmsg) ?
truncate (LOCAL->buf,0) : unlink (LOCAL->buf))) {
sprintf (LOCAL->buf,
"Can't delete empty message file %.80s: %.80s",
cur->name,strerror (errno));
MM_LOG (LOCAL->buf,WARN);
}
}
}
else MM_LOG ("No mix message files found during expunge",WARN);
/* free directory list */
if (a = (void *) names) fs_give ((void **) &a);
}
/* either way, re-acquire shared lock */
if (flock (LOCAL->mfd,LOCK_SH|LOCK_NB))
fatal ("Unable to re-acquire metadata shared lock!");
/* Do this step even if ret is NIL (meaning some burp problem)! */
if (nexp || reclaimed) { /* rewrite index and status if changed */
LOCAL->indexseq = mix_modseq (LOCAL->indexseq);
if (mix_index_update (stream,idxf,NIL)) {
LOCAL->statusseq = mix_modseq (LOCAL->statusseq);
/* set failure if update fails */
ret = mix_status_update (stream,statf,NIL);
}
}
}
if (statf) fclose (statf); /* close status if still open */
if (idxf) fclose (idxf); /* close index if still open */
LOCAL->expok = NIL; /* cancel expok */
if (ret) { /* only if success */
char *s = NIL;
if (nexp) sprintf (s = LOCAL->buf,"Expunged %lu messages",nexp);
else if (reclaimed)
sprintf (s=LOCAL->buf,"Reclaimed %lu bytes of expunged space",reclaimed);
else if (!burponly)
s = stream->rdonly ? "Expunge ignored on readonly mailbox" :
"No messages deleted, so no update needed";
if (s) MM_LOG (s,(long) NIL);
}
return ret;
}
/* MIX test for message file name
* Accepts: candidate directory name
* Returns: T if message file name, NIL otherwise
*
* ".mix" with no suffix was used by experimental versions
*/
int mix_select (struct direct *name)
{
char c,*s;
/* make sure name has prefix */
if (mix_dirfmttest (name->d_name)) {
for (c = *(s = name->d_name + sizeof (MIXNAME) - 1); c && isxdigit (c);
c = *s++);
if (!c) return T; /* all-hex or no suffix */
}
return NIL; /* not suffix or non-hex */
}
/* MIX msg file name comparision
* Accepts: first candidate directory entry
* second candidate directory entry
* Returns: -1 if d1 < d2, 0 if d1 == d2, 1 d1 > d2
*/
int mix_msgfsort (const void *d1,const void *d2)
{
char *n1 = (*(struct direct **) d1)->d_name + sizeof (MIXNAME) - 1;
char *n2 = (*(struct direct **) d2)->d_name + sizeof (MIXNAME) - 1;
return compare_ulong (*n1 ? strtoul (n1,NIL,16) : 0,
*n2 ? strtoul (n2,NIL,16) : 0);
}
/* MIX add a range to a set
* Accepts: pointer to set to add
* start of set
* size of set
* Returns: T if success, set updated, NIL otherwise
*/
long mix_addset (SEARCHSET **set,unsigned long start,unsigned long size)
{
SEARCHSET *s = *set;
if (start < s->last) { /* sanity check */
char tmp[MAILTMPLEN];
sprintf (tmp,"Backwards-running mix index %lu < %lu",start,s->last);
MM_LOG (tmp,ERROR);
return NIL;
}
/* range initially empty? */
if (!s->last) s->first = start;
else if (start > s->last) /* no, start new range if can't append */
(*set = s = s->next = mail_newsearchset ())->first = start;
s->last = start + size; /* end of current range */
return LONGT;
}
/* MIX burp message file
* Accepts: MAIL stream
* current burp block for this message
* Returns: T if successful, NIL if failed
*/
static char *staterr = "Error in stat of mix message file %.80s: %.80s";
static char *truncerr = "Error truncating mix message file %.80s: %.80s";
long mix_burp (MAILSTREAM *stream,MIXBURP *burp,unsigned long *reclaimed)
{
MESSAGECACHE *elt;
SEARCHSET *set;
struct stat sbuf;
off_t rpos,wpos;
size_t size,wsize,wpending,written;
int fd;
FILE *f;
void *s;
unsigned long i;
long ret = NIL;
/* build file name */
mix_file_data (LOCAL->buf,stream->mailbox,burp->fileno);
/* need to burp at start or multiple ranges? */
if (!burp->set.first && !burp->set.next) {
/* easy case, single range at start of file */
if (stat (LOCAL->buf,&sbuf)) {
sprintf (LOCAL->buf,staterr,burp->name,strerror (errno));
MM_LOG (LOCAL->buf,ERROR);
}
/* is this range sane? */
else if (mix_burp_check (&burp->set,sbuf.st_size,LOCAL->buf)) {
/* if matches range then no burp needed! */
if (burp->set.last == sbuf.st_size) ret = LONGT;
/* just need to remove cruft at end */
else if (ret = !truncate (LOCAL->buf,burp->set.last))
*reclaimed += sbuf.st_size - burp->set.last;
else {
sprintf (LOCAL->buf,truncerr,burp->name,strerror (errno));
MM_LOG (LOCAL->buf,ERROR);
}
}
}
/* have to do more work, get the file */
else if (((fd = open (LOCAL->buf,O_RDWR,NIL)) < 0) ||
!(f = fdopen (fd,"r+b"))) {
sprintf (LOCAL->buf,"Error opening mix message file %.80s: %.80s",
burp->name,strerror (errno));
MM_LOG (LOCAL->buf,ERROR);
if (fd >= 0) close (fd); /* in case fdopen() failure */
}
else if (fstat (fd,&sbuf)) { /* get file size */
sprintf (LOCAL->buf,staterr,burp->name,strerror (errno));
MM_LOG (LOCAL->buf,ERROR);
fclose (f);
}
/* only if sane */
else if (mix_burp_check (&burp->set,sbuf.st_size,LOCAL->buf)) {
/* make sure each range starts with token */
for (set = &burp->set; set; set = set->next)
if (fseek (f,set->first,SEEK_SET) ||
(fread (LOCAL->buf,1,MSGTSZ,f) != MSGTSZ) ||
strncmp (LOCAL->buf,MSGTOK,MSGTSZ)) {
sprintf (LOCAL->buf,"Bad message token in mix message file at %lu",
set->first);
MM_LOG (LOCAL->buf,ERROR);
fclose (f);
return NIL; /* burp fails for this file */
}
/* burp out each old message */
for (set = &burp->set, wpos = 0; set; set = set->next) {
/* move down this range */
for (rpos = set->first, size = set->last - set->first;
size; size -= wsize) {
if (rpos != wpos) { /* data to skip at start? */
/* no, slide this buffer down */
wsize = min (size,LOCAL->buflen);
/* failure is not an option here */
while (fseek (f,rpos,SEEK_SET) ||
(fread (LOCAL->buf,1,wsize,f) != wsize)) {
MM_NOTIFY (stream,strerror (errno),WARN);
MM_DISKERROR (stream,errno,T);
}
/* nor here */
while (fseek (f,wpos,SEEK_SET)) {
MM_NOTIFY (stream,strerror (errno),WARN);
MM_DISKERROR (stream,errno,T);
}
/* and especially not here */
for (s = LOCAL->buf, wpending = wsize; wpending; wpending -= written)
if (!(written = fwrite (LOCAL->buf,1,wpending,f))) {
MM_NOTIFY (stream,strerror (errno),WARN);
MM_DISKERROR (stream,errno,T);
}
}
else wsize = size; /* nothing to skip, say we wrote it all */
rpos += wsize; wpos += wsize;
}
}
while (fflush (f)) { /* failure also not an option here... */
MM_NOTIFY (stream,strerror (errno),WARN);
MM_DISKERROR (stream,errno,T);
}
if (ftruncate (fd,wpos)) { /* flush cruft at end of file */
sprintf (LOCAL->buf,truncerr,burp->name,strerror (errno));
MM_LOG (LOCAL->buf,WARN);
}
else *reclaimed += rpos - wpos;
ret = !fclose (f); /* close file */
/* slide down message positions in index */
for (i = 1,rpos = 0; i <= stream->nmsgs; ++i)
if ((elt = mail_elt (stream,i))->private.spare.data == burp->fileno) {
elt->private.special.offset = rpos;
rpos += elt->private.msg.header.offset + elt->rfc822_size;
}
/* debugging */
if (rpos != wpos) fatal ("burp size consistency check!");
}
return ret;
}
/* MIX burp sanity check to make sure not burping off end of file
* Accepts: burp set
* file size
* file name
* Returns: T if sane, NIL if insane
*/
long mix_burp_check (SEARCHSET *set,size_t size,char *file)
{
do if (set->last > size) { /* sanity check */
char tmp[MAILTMPLEN];
sprintf (tmp,"Unexpected short mix message file %.80s %lu < %lu",
file,size,set->last);
MM_LOG (tmp,ERROR);
return NIL; /* don't burp this file at all */
} while (set = set->next);
return LONGT;
}
/* MIX mail copy message(s)
* Accepts: MAIL stream
* sequence
* destination mailbox
* copy options
* Returns: T if copy successful, else NIL
*/
long mix_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
FDDATA d;
STRING st;
char tmp[2*MAILTMPLEN];
long ret = mix_isvalid (mailbox,LOCAL->buf);
mailproxycopy_t pc =
(mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
MAILSTREAM *astream = NIL;
FILE *idxf = NIL;
FILE *msgf = NIL;
FILE *statf = NIL;
if (!ret) switch (errno) { /* make sure valid mailbox */
case NIL: /* no error in stat() */
if (pc) return (*pc) (stream,sequence,mailbox,options);
sprintf (tmp,"Not a MIX-format mailbox: %.80s",mailbox);
MM_LOG (tmp,ERROR);
break;
default: /* some stat() error */
MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
break;
}
/* get sequence to copy */
else if (!(ret = ((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))));
/* acquire stream to append */
else if (ret = ((astream = mail_open (NIL,mailbox,OP_SILENT)) &&
!astream->rdonly &&
(((MIXLOCAL *) astream->local)->expok = T) &&
(statf = mix_parse (astream,&idxf,LONGT,NIL))) ?
LONGT : NIL) {
int fd;
unsigned long i;
MESSAGECACHE *elt;
unsigned long newsize,hdrsize,size;
MIXLOCAL *local = (MIXLOCAL *) astream->local;
unsigned long seq = mix_modseq (local->metaseq);
/* make sure new modseq fits */
if (local->indexseq > seq) seq = local->indexseq + 1;
if (local->statusseq > seq) seq = local->statusseq + 1;
/* calculate size of per-message header */
sprintf (local->buf,MSRFMT,MSGTOK,0,0,0,0,0,0,0,'+',0,0,0);
hdrsize = strlen (local->buf);
MM_CRITICAL (stream); /* go critical */
astream->silent = T; /* no events here */
/* calculate size that will be added */
for (i = 1, newsize = 0; i <= stream->nmsgs; ++i)
if ((elt = mail_elt (stream,i))->sequence)
newsize += hdrsize + elt->rfc822_size;
/* open data file */
if (msgf = mix_data_open (astream,&fd,&size,newsize)) {
char *t;
unsigned long j,uid,uidv;
copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
SEARCHSET *source = cu ? mail_newsearchset () : NIL;
SEARCHSET *dest = cu ? mail_newsearchset () : NIL;
for (i = 1,uid = uidv = 0; ret && (i <= stream->nmsgs); ++i)
if (((elt = mail_elt (stream,i))->sequence) && elt->rfc822_size) {
/* is message in current message file? */
if ((LOCAL->msgfd < 0) ||
(elt->private.spare.data != LOCAL->curmsg)) {
if (LOCAL->msgfd >= 0) close (LOCAL->msgfd);
if ((LOCAL->msgfd = open (mix_file_data (LOCAL->buf,
stream->mailbox,
elt->private.spare.data),
O_RDONLY,NIL)) >= 0)
LOCAL->curmsg = elt->private.spare.data;
}
if (LOCAL->msgfd < 0) ret = NIL;
else { /* got file */
d.fd = LOCAL->msgfd;/* set up file descriptor */
/* start of message */
d.pos = elt->private.special.offset +
elt->private.msg.header.offset;
d.chunk = LOCAL->buf;
d.chunksize = CHUNKSIZE;
INIT (&st,fd_string,&d,elt->rfc822_size);
/* init flag string */
tmp[0] = tmp[1] = '\0';
if (j = elt->user_flags) do
if ((t = stream->user_flags[find_rightmost_bit (&j)]) && *t)
strcat (strcat (tmp," "),t);
while (j);
if (elt->seen) strcat (tmp," \\Seen");
if (elt->deleted) strcat (tmp," \\Deleted");
if (elt->flagged) strcat (tmp," \\Flagged");
if (elt->answered) strcat (tmp," \\Answered");
if (elt->draft) strcat (tmp," \\Draft");
tmp[0] = '('; /* wrap list */
strcat (tmp,")");
/* if append OK, add to source set */
if ((ret = mix_append_msg (astream,msgf,tmp,elt,&st,dest,
seq)) && source)
mail_append_set (source,mail_uid (stream,i));
}
}
/* finish write if success */
if (ret && (ret = !fflush (msgf))) {
fclose (msgf); /* all good, close the msg file now */
/* write new metadata, index, and status */
local->metaseq = local->indexseq = local->statusseq = seq;
if (ret = (mix_meta_update (astream) &&
mix_index_update (astream,idxf,LONGT))) {
/* success, delete if doing a move */
if (options & CP_MOVE)
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
elt->deleted = T;
if (!stream->rdonly) elt->private.mod = LOCAL->statusseq = seq;
MM_FLAGS (stream,elt->msgno);
}
/* done with status file now */
mix_status_update (astream,statf,LONGT);
/* return sets if doing COPYUID */
if (cu) (*cu) (stream,mailbox,astream->uid_validity,source,dest);
source = dest = NIL; /* don't free these sets now */
}
}
else { /* error */
if (errno) { /* output error message if system call error */
sprintf (tmp,"Message copy failed: %.80s",strerror (errno));
MM_LOG (tmp,ERROR);
}
ftruncate (fd,size); /* revert file */
close (fd); /* make sure that fclose doesn't corrupt us */
fclose (msgf); /* free the stdio resources */
}
/* flush any sets remaining */
mail_free_searchset (&source);
mail_free_searchset (&dest);
}
else { /* message file open failed */
sprintf (tmp,"Error opening copy message file: %.80s",
strerror (errno));
MM_LOG (tmp,ERROR);
ret = NIL;
}
MM_NOCRITICAL (stream);
}
else MM_LOG ("Can't open copy mailbox",ERROR);
if (statf) fclose (statf); /* close status if still open */
if (idxf) fclose (idxf); /* close index if still open */
/* finished with append stream */
if (astream) mail_close (astream);
return ret; /* return state */
}
/* MIX mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* append callback
* data for callback
* Returns: T if append successful, else NIL
*/
long mix_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
STRING *message;
char *flags,*date,tmp[MAILTMPLEN];
/* N.B.: can't use LOCAL->buf for tmp */
long ret = mix_isvalid (mailbox,tmp);
/* default stream to prototype */
if (!stream) stream = user_flags (&mixproto);
if (!ret) switch (errno) { /* if not valid mailbox */
case ENOENT: /* no such file? */
if (ret = compare_cstring (mailbox,"INBOX") ?
NIL : mix_create (NIL,"INBOX"))
break;
MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before append",NIL);
break;
default:
sprintf (tmp,"Not a MIX-format mailbox: %.80s",mailbox);
MM_LOG (tmp,ERROR);
break;
}
/* get first message */
if (ret && MM_APPEND (af) (stream,data,&flags,&date,&message)) {
MAILSTREAM *astream;
FILE *idxf = NIL;
FILE *msgf = NIL;
FILE *statf = NIL;
if (ret = ((astream = mail_open (NIL,mailbox,OP_SILENT)) &&
!astream->rdonly &&
(((MIXLOCAL *) astream->local)->expok = T) &&
(statf = mix_parse (astream,&idxf,LONGT,NIL))) ?
LONGT : NIL) {
int fd;
unsigned long size,hdrsize;
MESSAGECACHE elt;
MIXLOCAL *local = (MIXLOCAL *) astream->local;
unsigned long seq = mix_modseq (local->metaseq);
/* make sure new modseq fits */
if (local->indexseq > seq) seq = local->indexseq + 1;
if (local->statusseq > seq) seq = local->statusseq + 1;
/* calculate size of per-message header */
sprintf (local->buf,MSRFMT,MSGTOK,0,0,0,0,0,0,0,'+',0,0,0);
hdrsize = strlen (local->buf);
MM_CRITICAL (astream); /* go critical */
astream->silent = T; /* no events here */
/* open data file */
if (msgf = mix_data_open (astream,&fd,&size,hdrsize + SIZE (message))) {
appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
SEARCHSET *dst = au ? mail_newsearchset () : NIL;
while (ret && message) {/* while good to go and have messages */
errno = NIL; /* in case one of these causes failure */
/* guard against zero-length */
if (!(ret = SIZE (message)))
MM_LOG ("Append of zero-length message",ERROR);
else if (date && !(ret = mail_parse_date (&elt,date))) {
sprintf (tmp,"Bad date in append: %.80s",date);
MM_LOG (tmp,ERROR);
}
else {
if (!date) { /* if date not specified, use now */
internal_date (tmp);
mail_parse_date (&elt,tmp);
}
ret = mix_append_msg (astream,msgf,flags,&elt,message,dst,seq) &&
MM_APPEND (af) (stream,data,&flags,&date,&message);
}
}
/* finish write if success */
if (ret && (ret = !fflush (msgf))) {
fclose (msgf); /* all good, close the msg file now */
/* write new metadata, index, and status */
local->metaseq = local->indexseq = local->statusseq = seq;
if ((ret = (mix_meta_update (astream) &&
mix_index_update (astream,idxf,LONGT) &&
mix_status_update (astream,statf,LONGT))) && au) {
(*au) (mailbox,astream->uid_validity,dst);
dst = NIL; /* don't free this set now */
}
}
else { /* failure */
if (errno) { /* output error message if system call error */
sprintf (tmp,"Message append failed: %.80s",strerror (errno));
MM_LOG (tmp,ERROR);
}
ftruncate (fd,size); /* revert all writes to file*/
close (fd); /* make sure that fclose doesn't corrupt us */
fclose (msgf); /* free the stdio resources */
}
/* flush any set remaining */
mail_free_searchset (&dst);
}
else { /* message file open failed */
sprintf (tmp,"Error opening append message file: %.80s",
strerror (errno));
MM_LOG (tmp,ERROR);
ret = NIL;
}
MM_NOCRITICAL (astream); /* release critical */
}
else MM_LOG ("Can't open append mailbox",ERROR);
if (statf) fclose (statf); /* close status if still open */
if (idxf) fclose (idxf); /* close index if still open */
if (astream) mail_close (astream);
}
return ret;
}
/* MIX mail append single message
* Accepts: MAIL stream
* flags for new message if non-NIL
* elt with source date if non-NIL
* stringstruct of message text
* searchset to place UID
* modseq of message
* Returns: T if success, NIL if failure
*/
long mix_append_msg (MAILSTREAM *stream,FILE *f,char *flags,MESSAGECACHE *delt,
STRING *msg,SEARCHSET *set,unsigned long seq)
{
MESSAGECACHE *elt;
int c,cs;
unsigned long i,j,k,uf,hoff;
long sf;
stream->kwd_create = NIL; /* don't copy unknown keywords */
sf = mail_parse_flags (stream,flags,&uf);
/* swell the cache */
mail_exists (stream,++stream->nmsgs);
/* assign new UID from metadata */
(elt = mail_elt (stream,stream->nmsgs))->private.uid = ++stream->uid_last;
elt->private.mod = seq; /* set requested modseq in status */
elt->rfc822_size = SIZE (msg);/* copy message size and date to index */
elt->year = delt->year; elt->month = delt->month; elt->day = delt->day;
elt->hours = delt->hours; elt->minutes = delt->minutes;
elt->seconds = delt->seconds; elt->zoccident = delt->zoccident;
elt->zhours = delt->zhours; elt->zminutes = delt->zminutes;
/*
* Do NOT set elt->valid here! mix_status_update() uses it to determine
* whether a message should be marked as old.
*/
if (sf&fSEEN) elt->seen = T; /* copy flags to status */
if (sf&fDELETED) elt->deleted = T;
if (sf&fFLAGGED) elt->flagged = T;
if (sf&fANSWERED) elt->answered = T;
if (sf&fDRAFT) elt->draft = T;
elt->user_flags |= uf;
/* message is in new message file */
elt->private.spare.data = LOCAL->newmsg;
/* offset to message internal header */
elt->private.special.offset = ftell (f);
/* build header for message */
fprintf (f,MSRFMT,MSGTOK,elt->private.uid,
elt->year + BASEYEAR,elt->month,elt->day,
elt->hours,elt->minutes,elt->seconds,
elt->zoccident ? '-' : '+',elt->zhours,elt->zminutes,
elt->rfc822_size);
/* offset to header from internal header */
elt->private.msg.header.offset = ftell (f) - elt->private.special.offset;
for (cs = 0; SIZE (msg); ) { /* copy message */
if (elt->private.msg.header.text.size) {
if (msg->cursize) /* blat entire chunk if have it */
for (j = msg->cursize; j; j -= k)
if (!(k = fwrite (msg->curpos,1,j,f))) return NIL;
SETPOS (msg,GETPOS (msg) + msg->cursize);
}
else { /* still searching for delimiter */
c = 0xff & SNX (msg); /* get source character */
if (putc (c,f) == EOF) return NIL;
switch (cs) { /* decide what to do based on state */
case 0: /* previous char ordinary */
if (c == '\015') cs = 1;/* advance if CR */
break;
case 1: /* previous CR, advance if LF */
cs = (c == '\012') ? 2 : 0;
break;
case 2: /* previous CRLF, advance if CR */
cs = (c == '\015') ? 3 : 0;
break;
case 3: /* previous CRLFCR, done if LF */
if (c == '\012') elt->private.msg.header.text.size =
elt->rfc822_size - SIZE (msg);
cs = 0; /* reset mechanism */
break;
}
}
}
/* if no delimiter, header is entire msg */
if (!elt->private.msg.header.text.size)
elt->private.msg.header.text.size = elt->rfc822_size;
/* add this message to set */
mail_append_set (set,elt->private.uid);
return LONGT; /* success */
}
/* MIX mail read metadata, index, and status
* Accepts: MAIL stream
* returned index file
* index file flags (non-NIL if want to add/remove messages)
* status file flags (non-NIL if want to update elt->valid and old)
* Returns: open status file, or NIL if failure
*
* Note that this routine can return an open index file even if it fails!
*/
static char *shortmsg =
"message %lu (UID=%.08lx) truncated by %lu byte(s) (%lu < %lu)";
FILE *mix_parse (MAILSTREAM *stream,FILE **idxf,long iflags,long sflags)
{
int fd;
unsigned long i;
char *s,*t;
struct stat sbuf;
FILE *statf = NIL;
short metarepairneeded = 0;
short indexrepairneeded = 0;
short silent = stream->silent;
*idxf = NIL; /* in case error */
/* readonly means no updates */
if (stream->rdonly) iflags = sflags = NIL;
/* open index file */
if ((fd = open (LOCAL->index,iflags ? O_RDWR : O_RDONLY,NIL)) < 0)
MM_LOG ("Error opening mix index file",ERROR);
/* acquire exclusive access and FILE */
else if (!flock (fd,iflags ? LOCK_EX : LOCK_SH) &&
!(*idxf = fdopen (fd,iflags ? "r+b" : "rb"))) {
MM_LOG ("Error obtaining stream on mix index file",ERROR);
flock (fd,LOCK_UN); /* relinquish lock */
close (fd);
}
/* slurp metadata */
else if (s = mix_meta_slurp (stream,&i)) {
unsigned long j = 0; /* non-zero if UIDVALIDITY/UIDLAST changed */
if (i != LOCAL->metaseq) { /* metadata changed? */
char *t,*k;
LOCAL->metaseq = i; /* note new metadata sequence */
while (s && *s) { /* parse entire metadata file */
/* locate end of line */
if (s = strstr (t = s,"\015\012")) {
*s = '\0'; /* tie off line */
s += 2; /* skip past CRLF */
switch (*t++) { /* parse line */
case 'V': /* UIDVALIDITY */
if (!isxdigit (*t) || !(i = strtoul (t,&t,16))) {
MM_LOG ("Error in mix metadata file UIDVALIDITY record",ERROR);
return NIL; /* give up */
}
if (i != stream->uid_validity) j = stream->uid_validity = i;
break;
case 'L': /* new UIDLAST */
if (!isxdigit (*t)) {
MM_LOG ("Error in mix metadata file UIDLAST record",ERROR);
return NIL; /* give up */
}
if ((i = strtoul (t,&t,16)) != stream->uid_last)
j = stream->uid_last = i;
break;
case 'N': /* new message file */
if (!isxdigit (*t)) {
MM_LOG ("Error in mix metadata file new msg record",ERROR);
return NIL; /* give up */
}
if ((i = strtoul (t,&t,16)) != stream->uid_last)
LOCAL->newmsg = i;
break;
case 'K': /* new keyword list */
for (i = 0; t && *t && (i < NUSERFLAGS); ++i) {
if (t = strchr (k = t,' ')) *t++ = '\0';
/* make sure keyword non-empty */
if (*k && (strlen (k) <= MAXUSERFLAG)) {
/* in case value changes (shouldn't happen) */
if (stream->user_flags[i] && strcmp (stream->user_flags[i],k)){
char tmp[MAILTMPLEN];
sprintf (tmp,"flag rename old=%.80s new=%.80s",
stream->user_flags[i],k);
MM_LOG (tmp,WARN);
fs_give ((void **) &stream->user_flags[i]);
}
if (!stream->user_flags[i]) stream->user_flags[i] = cpystr (k);
}
else break; /* empty keyword */
}
if ((i < NUSERFLAGS) && stream->user_flags[i]) {
MM_LOG ("Error in mix metadata file keyword record",ERROR);
return NIL; /* give up */
}
else if (i == NUSERFLAGS) stream->kwd_create = NIL;
break;
}
}
if (t && *t) { /* junk in line */
MM_LOG ("Error in mix metadata record",ERROR);
return NIL; /* give up */
}
}
}
/* get sequence */
if (!(i = mix_read_sequence (*idxf)) || (i < LOCAL->indexseq)) {
MM_LOG ("Error in mix index file sequence record",ERROR);
return NIL; /* give up */
}
/* sequence changed from last time? */
else if (j || (i > LOCAL->indexseq)) {
unsigned long uid,nmsgs,curfile,curfilesize,curpos;
char *t,*msg,tmp[MAILTMPLEN];
/* start with no messages */
curfile = curfilesize = curpos = nmsgs = 0;
/* update sequence iff expunging OK */
if (LOCAL->expok) LOCAL->indexseq = i;
/* get first elt */
while ((s = mix_read_record (*idxf,LOCAL->buf,LOCAL->buflen,"index")) &&
*s)
switch (*s) {
case ':': /* message record */
if (!(isxdigit (*++s) && (uid = strtoul (s,&t,16)))) msg = "UID";
else if (!((*t++ == ':') && isdigit (*t) && isdigit (t[1]) &&
isdigit (t[2]) && isdigit (t[3]) && isdigit (t[4]) &&
isdigit (t[5]) && isdigit (t[6]) && isdigit (t[7]) &&
isdigit (t[8]) && isdigit (t[9]) && isdigit (t[10]) &&
isdigit (t[11]) && isdigit (t[12]) && isdigit (t[13]) &&
((t[14] == '+') || (t[14] == '-')) &&
isdigit (t[15]) && isdigit (t[16]) && isdigit (t[17]) &&
isdigit (t[18]))) msg = "internaldate";
else if ((*(s = t+19) != ':') || !isxdigit (*++s)) msg = "size";
else {
unsigned int y = (((*t - '0') * 1000) + ((t[1] - '0') * 100) +
((t[2] - '0') * 10) + t[3] - '0') - BASEYEAR;
unsigned int m = ((t[4] - '0') * 10) + t[5] - '0';
unsigned int d = ((t[6] - '0') * 10) + t[7] - '0';
unsigned int hh = ((t[8] - '0') * 10) + t[9] - '0';
unsigned int mm = ((t[10] - '0') * 10) + t[11] - '0';
unsigned int ss = ((t[12] - '0') * 10) + t[13] - '0';
unsigned int z = (t[14] == '-') ? 1 : 0;
unsigned int zh = ((t[15] - '0') * 10) + t[16] - '0';
unsigned int zm = ((t[17] - '0') * 10) + t[18] - '0';
unsigned long size = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
unsigned long file = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
unsigned long pos = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
unsigned long hpos = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
unsigned long hsiz = strtoul (s,&s,16);
if (uid > stream->uid_last) {
sprintf (tmp,"mix index invalid UID (%08lx < %08lx)",
uid,stream->uid_last);
if (stream->rdonly) {
MM_LOG (tmp,ERROR);
return NIL;
}
strcat (tmp,", repaired");
MM_LOG (tmp,WARN);
stream->uid_last = uid;
metarepairneeded = T;
}
/* ignore expansion values */
if (*s++ == ':') {
MESSAGECACHE *elt;
++nmsgs; /* this is another mesage */
/* within current known range of messages? */
while (nmsgs <= stream->nmsgs) {
/* yes, get corresponding elt */
elt = mail_elt (stream,nmsgs);
/* existing message with matching data? */
if (uid == elt->private.uid) {
/* beware of Dracula's resurrection */
if (elt->private.ghost) {
sprintf (tmp,"mix index data unexpunged UID: %lx",
uid);
MM_LOG (tmp,ERROR);
return NIL;
}
/* also of static data changing */
if ((size != elt->rfc822_size) ||
(file != elt->private.spare.data) ||
(pos != elt->private.special.offset) ||
(hpos != elt->private.msg.header.offset) ||
(hsiz != elt->private.msg.header.text.size) ||
(y != elt->year) || (m != elt->month) ||
(d != elt->day) || (hh != elt->hours) ||
(mm != elt->minutes) || (ss != elt->seconds) ||
(z != elt->zoccident) || (zh != elt->zhours) ||
(zm != elt->zminutes)) {
sprintf (tmp,"mix index data mismatch: %lx",uid);
MM_LOG (tmp,ERROR);
return NIL;
}
break;
}
/* existing msg with lower UID is expunged */
else if (uid > elt->private.uid) {
if (LOCAL->expok) mail_expunged (stream,nmsgs);
else {/* message expunged, but not yet for us */
++nmsgs;
elt->private.ghost = T;
}
}
else { /* unexpected message record */
sprintf (tmp,"mix index UID mismatch (%lx < %lx)",
uid,elt->private.uid);
MM_LOG (tmp,ERROR);
return NIL;
}
}
/* time to create a new message? */
if (nmsgs > stream->nmsgs) {
/* defer announcing until later */
stream->silent = T;
mail_exists (stream,nmsgs);
stream->silent = silent;
(elt = mail_elt (stream,nmsgs))->recent = T;
elt->private.uid = uid; elt->rfc822_size = size;
elt->private.spare.data = file;
elt->private.special.offset = pos;
elt->private.msg.header.offset = hpos;
elt->private.msg.header.text.size = hsiz;
elt->year = y; elt->month = m; elt->day = d;
elt->hours = hh; elt->minutes = mm;
elt->seconds = ss; elt->zoccident = z;
elt->zhours = zh; elt->zminutes = zm;
/* message in same file? */
if (curfile == file) {
if (pos < curpos) {
MESSAGECACHE *plt = mail_elt (stream,elt->msgno-1);
/* uh-oh, calculate delta? */
i = curpos - pos;
sprintf (tmp,shortmsg,plt->msgno,plt->private.uid,
i,pos,curpos);
/* possible to fix? */
if (!stream->rdonly && LOCAL->expok &&
(i < plt->rfc822_size)) {
plt->rfc822_size -= i;
if (plt->rfc822_size <
plt->private.msg.header.text.size)
plt->private.msg.header.text.size =
plt->rfc822_size;
strcat (tmp,", repaired");
indexrepairneeded = T;
}
MM_LOG (tmp,WARN);
}
}
else { /* new file, restart */
if (stat (mix_file_data (LOCAL->buf,stream->mailbox,
curfile = file),&sbuf)) {
sprintf (tmp,"Missing mix data file: %.500s",
LOCAL->buf);
MM_LOG (tmp,ERROR);
return NIL;
}
curfile = file;
curfilesize = sbuf.st_size;
}
/* position of message in file */
curpos = pos + elt->private.msg.header.offset +
elt->rfc822_size;
/* short file? */
if (curfilesize < curpos) {
/* uh-oh, calculate delta? */
i = curpos - curfilesize;
sprintf (tmp,shortmsg,elt->msgno,elt->private.uid,
i,curfilesize,curpos);
/* possible to fix? */
if (!stream->rdonly && LOCAL->expok &&
(i < elt->rfc822_size)) {
elt->rfc822_size -= i;
if (elt->rfc822_size <
elt->private.msg.header.text.size)
elt->private.msg.header.text.size =
elt->rfc822_size;
strcat (tmp,", repaired");
indexrepairneeded = T;
}
MM_LOG (tmp,WARN);
}
}
break;
}
else msg = "expansion";
}
else msg = "header size";
}
else msg = "header position";
}
else msg = "message position";
}
else msg = "file#";
}
sprintf (tmp,"Error in %s in mix index file: %.500s",msg,s);
MM_LOG (tmp,ERROR);
return NIL;
default:
sprintf (tmp,"Unknown record in mix index file: %.500s",s);
MM_LOG (tmp,ERROR);
return NIL;
}
if (!s) return NIL; /* barfage from mix_read_record() */
/* expunge trailing messages not in index */
if (LOCAL->expok) while (nmsgs < stream->nmsgs)
mail_expunged (stream,stream->nmsgs);
}
/* repair metadata and index if needed */
if ((metarepairneeded ? mix_meta_update (stream) : T) &&
(indexrepairneeded ? mix_index_update (stream,*idxf,NIL) : T)) {
MESSAGECACHE *elt;
int fd;
unsigned long uid,uf,sf,mod;
char *s;
int updatep = NIL;
/* open status file */
if ((fd = open (LOCAL->status,
stream->rdonly ? O_RDONLY : O_RDWR,NIL)) < 0)
MM_LOG ("Error opening mix status file",ERROR);
/* acquire exclusive access and FILE */
else if (!flock (fd,stream->rdonly ? LOCK_SH : LOCK_EX) &&
!(statf = fdopen (fd,stream->rdonly ? "rb" : "r+b"))) {
MM_LOG ("Error obtaining stream on mix status file",ERROR);
flock (fd,LOCK_UN); /* relinquish lock */
close (fd);
}
/* get sequence */
else if (!(i = mix_read_sequence (statf)) ||
((i < LOCAL->statusseq) && stream->nmsgs && (i != 1))) {
sprintf (LOCAL->buf,
"Error in mix status sequence record, i=%lx, seq=%lx",
i,LOCAL->statusseq);
MM_LOG (LOCAL->buf,ERROR);
}
/* sequence changed from last time? */
else if (i != LOCAL->statusseq) {
/* update sequence, get first elt */
if (i > LOCAL->statusseq) LOCAL->statusseq = i;
if (stream->nmsgs) {
elt = mail_elt (stream,i = 1);
/* read message records */
while ((t = s = mix_read_record (statf,LOCAL->buf,LOCAL->buflen,
"status")) && *s && (*s++ == ':') &&
isxdigit (*s)) {
uid = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
uf = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
sf = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
mod = strtoul (s,&s,16);
/* ignore expansion values */
if (*s++ == ':') {
/* need to move ahead to next elt? */
while ((uid > elt->private.uid) && (i < stream->nmsgs))
elt = mail_elt (stream,++i);
/* update elt if altered */
if ((uid == elt->private.uid) &&
(!elt->valid || (mod != elt->private.mod))) {
elt->user_flags = uf;
elt->private.mod = mod;
elt->seen = (sf & fSEEN) ? T : NIL;
elt->deleted = (sf & fDELETED) ? T : NIL;
elt->flagged = (sf & fFLAGGED) ? T : NIL;
elt->answered = (sf & fANSWERED) ? T : NIL;
elt->draft = (sf & fDRAFT) ? T : NIL;
/* announce if altered existing message */
if (elt->valid) MM_FLAGS (stream,elt->msgno);
/* first time, is old message? */
else if (sf & fOLD) {
/* yes, clear recent and set valid */
elt->recent = NIL;
elt->valid = T;
}
/* recent, allowed to update its status? */
else if (sflags) {
/* yes, set valid and check in status */
elt->valid = T;
elt->private.mod = mix_modseq (elt->private.mod);
updatep = T;
}
/* leave valid unset and recent if sflags not set */
}
continue; /* everything looks good */
}
}
}
}
break; /* error somewhere */
}
if (t && *t) { /* non-null means bogus record */
char msg[MAILTMPLEN];
sprintf (msg,"Error in mix status file message record%s: %.80s",
stream->rdonly ? "" : ", fixing",t);
MM_LOG (msg,WARN);
/* update it if not readonly */
if (!stream->rdonly) updatep = T;
}
if (updatep) { /* need to update? */
LOCAL->statusseq = mix_modseq (LOCAL->statusseq);
mix_status_update (stream,statf,LONGT);
}
}
}
}
}
if (statf) { /* still happy? */
unsigned long j;
stream->silent = silent; /* now notify upper level */
mail_exists (stream,stream->nmsgs);
for (i = 1, j = 0; i <= stream->nmsgs; ++i)
if (mail_elt (stream,i)->recent) ++j;
mail_recent (stream,j);
}
return statf;
}
/* MIX metadata file routines */
/* MIX read metadata
* Accepts: MAIL stream
* return pointer for modseq
* Returns: pointer to metadata after modseq or NIL if failure
*/
char *mix_meta_slurp (MAILSTREAM *stream,unsigned long *seq)
{
struct stat sbuf;
char *s;
char *ret = NIL;
if (fstat (LOCAL->mfd,&sbuf))
MM_LOG ("Error obtaining size of mix metatdata file",ERROR);
if (sbuf.st_size > LOCAL->buflen) {
/* should be just a few dozen bytes */
if (sbuf.st_size > METAMAX) fatal ("absurd mix metadata file size");
fs_give ((void **) &LOCAL->buf);
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = sbuf.st_size) + 1);
}
/* read current metadata file */
LOCAL->buf[sbuf.st_size] = '\0';
if (lseek (LOCAL->mfd,0,L_SET) ||
(read (LOCAL->mfd,s = LOCAL->buf,sbuf.st_size) != sbuf.st_size))
MM_LOG ("Error reading mix metadata file",ERROR);
else if ((*s != 'S') || !isxdigit (s[1]) ||
((*seq = strtoul (s+1,&s,16)) < LOCAL->metaseq) ||
(*s++ != '\015') || (*s++ != '\012'))
MM_LOG ("Error in mix metadata file sequence record",ERROR);
else ret = s;
return ret;
}
/* MIX update metadata
* Accepts: MAIL stream
* Returns: T on success, NIL if error
*
* Index MUST be locked!!
*/
long mix_meta_update (MAILSTREAM *stream)
{
long ret;
/* do nothing if stream readonly */
if (stream->rdonly) ret = LONGT;
else {
unsigned char c,*s,*ss,*t;
unsigned long i;
/* The worst-case metadata is limited to:
* 4 * (1 + 8 + 2) + (NUSERFLAGS * (MAXUSERFLAG + 1))
* which comes out to 1994 octets. This is much smaller than the normal
* CHUNKSIZE definition of 64K, and CHUNKSIZE is the smallest size of
* LOCAL->buf.
*
* If more stuff gets added to the metadata, or if you change the value
* of NUSERFLAGS, MAXUSERFLAG or CHUNKSIZE, be sure to recalculate the
* above assertation.
*/
sprintf (LOCAL->buf,SEQFMT,LOCAL->metaseq = mix_modseq (LOCAL->metaseq));
sprintf (LOCAL->buf + strlen (LOCAL->buf),MTAFMT,
stream->uid_validity,stream->uid_last,LOCAL->newmsg);
for (i = 0, c = 'K', s = ss = LOCAL->buf + strlen (LOCAL->buf);
(i < NUSERFLAGS) && (t = stream->user_flags[i]); ++i) {
if (!*t) fatal ("impossible empty keyword");
*s++ = c; /* write delimiter */
while (*t) *s++ = *t++; /* write keyword */
c = ' '; /* delimiter is now space */
}
if (s != ss) { /* tie off keywords line */
*s++ = '\015'; *s++ = '\012';
}
/* calculate length of metadata */
if ((i = s - LOCAL->buf) > LOCAL->buflen)
fatal ("impossible buffer overflow");
lseek (LOCAL->mfd,0,L_SET); /* rewind file */
/* write new metadata */
ret = (write (LOCAL->mfd,LOCAL->buf,i) == i) ? LONGT : NIL;
ftruncate (LOCAL->mfd,i); /* and tie off at that point */
}
return ret;
}
/* MIX index file routines */
/* MIX update index
* Accepts: MAIL stream
* open FILE
* expansion check flag
* Returns: T on success, NIL if error
*/
long mix_index_update (MAILSTREAM *stream,FILE *idxf,long flag)
{
unsigned long i;
long ret = LONGT;
if (!stream->rdonly) { /* do nothing if stream readonly */
if (flag) { /* need to do expansion check? */
char tmp[MAILTMPLEN];
size_t size;
struct stat sbuf;
/* calculate file size we need */
for (i = 1, size = 0; i <= stream->nmsgs; ++i)
if (!mail_elt (stream,i)->private.ghost) ++size;
if (size) { /* Winston Smith's first dairy entry */
sprintf (tmp,IXRFMT,0,14,4,4,13,0,0,'+',0,0,0,0,0,0,0);
size *= strlen (tmp);
}
/* calculate file size we need */
sprintf (tmp,SEQFMT,LOCAL->indexseq);
size += strlen (tmp);
/* get current file size */
if (fstat (fileno (idxf),&sbuf)) {
MM_LOG ("Error getting size of mix index file",ERROR);
ret = NIL;
}
/* need to write additional space? */
else if (sbuf.st_size < size) {
void *buf = fs_get (size -= sbuf.st_size);
memset (buf,0,size);
if (fseek (idxf,0,SEEK_END) || (fwrite (buf,1,size,idxf) != size) ||
fflush (idxf)) {
fseek (idxf,sbuf.st_size,SEEK_SET);
ftruncate (fileno (idxf),sbuf.st_size);
MM_LOG ("Error extending mix index file",ERROR);
ret = NIL;
}
fs_give ((void **) &buf);
}
}
if (ret) { /* if still good to go */
rewind (idxf); /* let's start at the very beginning */
/* write modseq first */
fprintf (idxf,SEQFMT,LOCAL->indexseq);
/* then write all messages */
for (i = 1; ret && (i <= stream->nmsgs); i++) {
MESSAGECACHE *elt = mail_elt (stream,i);
if (!elt->private.ghost)/* only write living messages */
fprintf (idxf,IXRFMT,elt->private.uid,
elt->year + BASEYEAR,elt->month,elt->day,
elt->hours,elt->minutes,elt->seconds,
elt->zoccident ? '-' : '+',elt->zhours,elt->zminutes,
elt->rfc822_size,elt->private.spare.data,
elt->private.special.offset,
elt->private.msg.header.offset,
elt->private.msg.header.text.size);
if (ferror (idxf)) {
MM_LOG ("Error updating mix index file",ERROR);
ret = NIL;
}
}
if (fflush (idxf)) {
MM_LOG ("Error flushing mix index file",ERROR);
ret = NIL;
}
if (ret) ftruncate (fileno (idxf),ftell (idxf));
}
}
return ret;
}
/* MIX status file routines */
/* MIX update status
* Accepts: MAIL stream
* pointer to open FILE
* expansion check flag
* Returns: T on success, NIL if error
*/
long mix_status_update (MAILSTREAM *stream,FILE *statf,long flag)
{
unsigned long i;
char tmp[MAILTMPLEN];
long ret = LONGT;
if (!stream->rdonly) { /* do nothing if stream readonly */
if (flag) { /* need to do expansion check? */
char tmp[MAILTMPLEN];
size_t size;
struct stat sbuf;
/* calculate file size we need */
for (i = 1, size = 0; i <= stream->nmsgs; ++i)
if (!mail_elt (stream,i)->private.ghost) ++size;
if (size) { /* number of living messages */
sprintf (tmp,STRFMT,0,0,0,0);
size *= strlen (tmp);
}
sprintf (tmp,SEQFMT,LOCAL->statusseq);
size += strlen (tmp);
/* get current file size */
if (fstat (fileno (statf),&sbuf)) {
MM_LOG ("Error getting size of mix status file",ERROR);
ret = NIL;
}
/* need to write additional space? */
else if (sbuf.st_size < size) {
void *buf = fs_get (size -= sbuf.st_size);
memset (buf,0,size);
if (fseek (statf,0,SEEK_END) || (fwrite (buf,1,size,statf) != size) ||
fflush (statf)) {
fseek (statf,sbuf.st_size,SEEK_SET);
ftruncate (fileno (statf),sbuf.st_size);
MM_LOG ("Error extending mix status file",ERROR);
ret = NIL;
}
fs_give ((void **) &buf);
}
}
if (ret) { /* if still good to go */
rewind (statf); /* let's start at the very beginning */
/* write sequence */
fprintf (statf,SEQFMT,LOCAL->statusseq);
/* write message status records */
for (i = 1; ret && (i <= stream->nmsgs); ++i) {
MESSAGECACHE *elt = mail_elt (stream,i);
/* make sure all messages have a modseq */
if (!elt->private.mod) elt->private.mod = LOCAL->statusseq;
if (!elt->private.ghost)/* only write living messages */
fprintf (statf,STRFMT,elt->private.uid,elt->user_flags,
(fSEEN * elt->seen) + (fDELETED * elt->deleted) +
(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
(fDRAFT * elt->draft) + (elt->valid ? fOLD : NIL),
elt->private.mod);
if (ferror (statf)) {
sprintf (tmp,"Error updating mix status file: %.80s",
strerror (errno));
MM_LOG (tmp,ERROR);
ret = NIL;
}
}
if (ret && fflush (statf)) {
MM_LOG ("Error flushing mix status file",ERROR);
ret = NIL;
}
if (ret) ftruncate (fileno (statf),ftell (statf));
}
}
return ret;
}
/* MIX data file routines */
/* MIX open data file
* Accepts: MAIL stream
* pointer to returned fd if success
* pointer to returned size if success
* size of new data to be added
* Returns: open FILE, or NIL if failure
*
* The curend test assumes that the last message of the mailbox is the furthest
* point that the current data file extends, and thus that is all that needs to
* be tested for short file prevention.
*/
FILE *mix_data_open (MAILSTREAM *stream,int *fd,long *size,
unsigned long newsize)
{
FILE *msgf = NIL;
struct stat sbuf;
MESSAGECACHE *elt = stream->nmsgs ? mail_elt (stream,stream->nmsgs) : NIL;
unsigned long curend = (elt && (elt->private.spare.data == LOCAL->newmsg)) ?
elt->private.special.offset + elt->private.msg.header.offset +
elt->rfc822_size : 0;
/* allow create if curend 0 */
if ((*fd = open (mix_file_data (LOCAL->buf,stream->mailbox,LOCAL->newmsg),
O_RDWR | (curend ? NIL : O_CREAT),NIL)) >= 0) {
fstat (*fd,&sbuf); /* get current file size */
/* can we use this file? */
if ((curend <= sbuf.st_size) &&
(!sbuf.st_size || ((sbuf.st_size + newsize) <= MIXDATAROLL)))
*size = sbuf.st_size; /* yes, return current size */
else { /* short file or becoming too long */
if (curend > sbuf.st_size) {
char tmp[MAILTMPLEN];
sprintf (tmp,"short mix message file %.08lx (%ld > %ld), rolling",
LOCAL->newmsg,curend,sbuf.st_size);
MM_LOG (tmp,WARN); /* shouldn't happen */
}
close (*fd); /* roll to a new file */
while ((*fd = open (mix_file_data
(LOCAL->buf,stream->mailbox,
LOCAL->newmsg = mix_modseq (LOCAL->newmsg)),
O_RDWR | O_CREAT | O_EXCL,sbuf.st_mode)) < 0);
*size = 0; /* brand new file */
fchmod (*fd,sbuf.st_mode);/* with same mode as previous file */
}
}
if (*fd >= 0) { /* have a data file? */
/* yes, get stdio and set position */
if (msgf = fdopen (*fd,"r+b")) fseek (msgf,*size,SEEK_SET);
else close (*fd); /* fdopen() failed? */
}
return msgf; /* return results */
}
/* MIX open sortcache
* Accepts: MAIL stream
* Returns: open FILE, or NIL if failure or could only get readonly sortcache
*/
FILE *mix_sortcache_open (MAILSTREAM *stream)
{
int fd,refwd;
unsigned long i,uid,sentdate,fromlen,tolen,cclen,subjlen,msgidlen,reflen;
char *s,*t,*msg,tmp[MAILTMPLEN];
MESSAGECACHE *elt;
SORTCACHE *sc;
STRINGLIST *sl;
struct stat sbuf;
int rdonly = NIL;
FILE *srtcf = NIL;
mailcache_t mc = (mailcache_t) mail_parameters (NIL,GET_CACHE,NIL);
fstat (LOCAL->mfd,&sbuf);
if (!stream->nmsgs); /* do nothing if mailbox empty */
/* open sortcache file */
else if (((fd = open (LOCAL->sortcache,O_RDWR|O_CREAT,sbuf.st_mode)) < 0) &&
!(rdonly = ((fd = open (LOCAL->sortcache,O_RDONLY,NIL)) >= 0)))
MM_LOG ("Error opening mix sortcache file",WARN);
/* acquire lock and FILE */
else if (!flock (fd,rdonly ? LOCK_SH : LOCK_EX) &&
!(srtcf = fdopen (fd,rdonly ? "rb" : "r+b"))) {
MM_LOG ("Error obtaining stream on mix sortcache file",WARN);
flock (fd,LOCK_UN); /* relinquish lock */
close (fd);
}
else if (!(i = mix_read_sequence (srtcf)) || (i < LOCAL->sortcacheseq))
MM_LOG ("Error in mix sortcache file sequence record",WARN);
/* sequence changed from last time? */
else if (i > LOCAL->sortcacheseq) {
LOCAL->sortcacheseq = i; /* update sequence */
while ((s = t = mix_read_record (srtcf,LOCAL->buf,LOCAL->buflen,
"sortcache")) && *s &&
(msg = "uid") && (*s++ == ':') && isxdigit (*s)) {
uid = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
sentdate = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
fromlen = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
tolen = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
cclen = strtoul (s,&s,16);
if ((*s++ == ':') && ((*s == 'R') || (*s == ' ')) &&
isxdigit (s[1])) {
refwd = (*s++ == 'R') ? T : NIL;
subjlen = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
msgidlen = strtoul (s,&s,16);
if ((*s++ == ':') && isxdigit (*s)) {
reflen = strtoul (s,&s,16);
/* ignore expansion values */
if (*s++ == ':') {
if (i = mail_msgno (stream,uid)) {
sc = (SORTCACHE *) (*mc) (stream,i,CH_SORTCACHE);
sc->size = (elt = mail_elt (stream,i))->rfc822_size;
sc->date = sentdate;
sc->arrival = elt->day ? mail_longdate (elt) : 1;
if (refwd) sc->refwd = T;
if (fromlen) {
if (sc->from) fseek (srtcf,fromlen + 2,SEEK_CUR);
else if ((getc (srtcf) != 'F') ||
(fread (sc->from = (char *) fs_get(fromlen),
1,fromlen-1,srtcf) != (fromlen-1))||
(sc->from[fromlen-1] = '\0') ||
(getc (srtcf) != '\015') ||
(getc (srtcf) != '\012')) {
msg = "from data";
break;
}
}
if (tolen) {
if (sc->to) fseek (srtcf,tolen + 2,SEEK_CUR);
else if ((getc (srtcf) != 'T') ||
(fread (sc->to = (char *) fs_get (tolen),
1,tolen-1,srtcf) != (tolen - 1)) ||
(sc->to[tolen-1] = '\0') ||
(getc (srtcf) != '\015') ||
(getc (srtcf) != '\012')) {
msg = "to data";
break;
}
}
if (cclen) {
if (sc->cc) fseek (srtcf,cclen + 2,SEEK_CUR);
else if ((getc (srtcf) != 'C') ||
(fread (sc->cc = (char *) fs_get (cclen),
1,cclen-1,srtcf) != (cclen - 1)) ||
(sc->cc[cclen-1] = '\0') ||
(getc (srtcf) != '\015') ||
(getc (srtcf) != '\012')) {
msg = "cc data";
break;
}
}
if (subjlen) {
if (sc->subject) fseek (srtcf,subjlen + 2,SEEK_CUR);
else if ((getc (srtcf) != 'S') ||
(fread (sc->subject =
(char *) fs_get (subjlen),1,
subjlen-1,srtcf) != (subjlen-1))||
(sc->subject[subjlen-1] = '\0') ||
(getc (srtcf) != '\015') ||
(getc (srtcf) != '\012')) {
msg = "subject data";
break;
}
}
if (msgidlen) {
if (sc->message_id)
fseek (srtcf,msgidlen + 2,SEEK_CUR);
else if ((getc (srtcf) != 'M') ||
(fread (sc->message_id =
(char *) fs_get (msgidlen),1,
msgidlen-1,srtcf) != (msgidlen-1))||
(sc->message_id[msgidlen-1] = '\0') ||
(getc (srtcf) != '\015') ||
(getc (srtcf) != '\012')) {
msg = "message-id data";
break;
}
}
if (reflen) {
if (sc->references) fseek(srtcf,reflen + 2,SEEK_CUR);
/* make sure it fits */
else {
if (reflen >= LOCAL->buflen) {
fs_give ((void **) &LOCAL->buf);
LOCAL->buf = (char *)
fs_get ((LOCAL->buflen = reflen) + 1);
}
if ((getc (srtcf) != 'R') ||
(fread (LOCAL->buf,1,reflen-1,srtcf) !=
(reflen - 1)) ||
(LOCAL->buf[reflen-1] = '\0') ||
(getc (srtcf) != '\015') ||
(getc (srtcf) != '\012')) {
msg = "references data";
break;
}
for (s = LOCAL->buf,sl = NIL,
sc->references = mail_newstringlist ();
s && *s; s += i + 1) {
if ((i = strtoul (s,&s,16)) && (*s++ == ':') &&
(s[i] == ':')) {
if (sl) sl = sl->next = mail_newstringlist();
else sl = sc->references;
s[i] = '\0';
sl->text.data = cpystr (s);
sl->text.size = i;
}
else s = NIL;
}
if (!s || *s ||
(s != ((char *) LOCAL->buf + reflen - 1))) {
msg = "references length consistency check";
break;
}
}
}
}
/* UID not found, ignore this message */
else fseek (srtcf,((fromlen ? fromlen + 2 : 0) +
(tolen ? tolen + 2 : 0) +
(cclen ? cclen + 2 : 0) +
(subjlen ? subjlen + 2 : 0) +
(msgidlen ? msgidlen + 2 : 0) +
(reflen ? reflen + 2 : 0)),
SEEK_CUR);
continue;
}
else msg = "expansion";
}
else msg = "references";
}
else msg = "message-id";
}
else msg = "subject";
}
else msg = "cc";
}
else msg = "to";
}
else msg = "from";
}
else msg = "sentdate";
break; /* error somewhere */
}
if (!t || *t) { /* error detected? */
if (t) { /* non-null means bogus record */
sprintf (tmp,"Error in %s in mix sortcache record: %.500s",msg,t);
MM_LOG (tmp,WARN);
}
fclose (srtcf); /* either way, must punt */
srtcf = NIL;
}
}
if (rdonly && srtcf) { /* can't update if readonly */
unlink (LOCAL->sortcache); /* try deleting it */
fclose (srtcf); /* so close it and return as if error */
srtcf = NIL;
}
else fchmod (fd,sbuf.st_mode);
return srtcf;
}
/* MIX update and close sortcache
* Accepts: MAIL stream
* pointer to open FILE (if FILE is NIL, do nothing)
* Returns: T on success, NIL on error
*/
long mix_sortcache_update (MAILSTREAM *stream,FILE **sortcache)
{
FILE *f = *sortcache;
long ret = LONGT;
if (f) { /* ignore if no file */
unsigned long i,j;
mailcache_t mc = (mailcache_t) mail_parameters (NIL,GET_CACHE,NIL);
for (i = 1; (i <= stream->nmsgs) &&
!((SORTCACHE *) (*mc) (stream,i,CH_SORTCACHE))->dirty; ++i);
if (i <= stream->nmsgs) { /* only update if some entry is dirty */
rewind (f); /* let's start at the very beginning */
/* write sequence */
fprintf (f,SEQFMT,LOCAL->sortcacheseq = mix_modseq(LOCAL->sortcacheseq));
for (i = 1; ret && (i <= stream->nmsgs); ++i) {
MESSAGECACHE *elt = mail_elt (stream,i);
SORTCACHE *s = (SORTCACHE *) (*mc) (stream,i,CH_SORTCACHE);
STRINGLIST *sl;
s->dirty = NIL; /* no longer dirty */
if (sl = s->references) /* count length of references */
for (j = 1; sl && sl->text.data; sl = sl->next)
j += 10 + sl->text.size;
else j = 0; /* no references yet */
fprintf (f,SCRFMT,elt->private.uid,s->date,
s->from ? strlen (s->from) + 1 : 0,
s->to ? strlen (s->to) + 1 : 0,s->cc ? strlen (s->cc) + 1 : 0,
s->refwd ? 'R' : ' ',s->subject ? strlen (s->subject) + 1: 0,
s->message_id ? strlen (s->message_id) + 1 : 0,j);
if (s->from) fprintf (f,"F%s\015\012",s->from);
if (s->to) fprintf (f,"T%s\015\012",s->to);
if (s->cc) fprintf (f,"C%s\015\012",s->cc);
if (s->subject) fprintf (f,"S%s\015\012",s->subject);
if (s->message_id) fprintf (f,"M%s\015\012",s->message_id);
if (j) { /* any references to write? */
fputc ('R',f); /* yes, do so */
for (sl = s->references; sl && sl->text.data; sl = sl->next)
fprintf (f,"%08lx:%s:",sl->text.size,sl->text.data);
fputs ("\015\012",f);
}
if (ferror (f)) {
MM_LOG ("Error updating mix sortcache file",WARN);
ret = NIL;
}
}
if (ret && fflush (f)) {
MM_LOG ("Error flushing mix sortcache file",WARN);
ret = NIL;
}
if (ret) ftruncate (fileno (f),ftell (f));
}
if (fclose (f)) {
MM_LOG ("Error closing mix sortcache file",WARN);
ret = NIL;
}
}
return ret;
}
/* MIX generic file routines */
/* MIX read record
* Accepts: open FILE
* buffer
* buffer length
* record type
* Returns: buffer if success, else NIL (zero-length buffer means EOF)
*/
char *mix_read_record (FILE *f,char *buf,unsigned long buflen,char *type)
{
char *s,tmp[MAILTMPLEN];
/* ensure string tied off */
buf[buflen-2] = buf[buflen-1] = '\0';
while (fgets (buf,buflen-1,f)) {
if (s = strchr (buf,'\012')) {
if ((s != buf) && (s[-1] == '\015')) --s;
*s = '\0'; /* tie off buffer */
if (s != buf) return buf; /* return if non-empty buffer */
sprintf (tmp,"Empty mix %s record",type);
MM_LOG (tmp,WARN);
}
else if (buf[buflen-2]) { /* overlong record is bad news */
sprintf (tmp,"Oversize mix %s record: %.512s",type,buf);
MM_LOG (tmp,ERROR);
return NIL;
}
else {
sprintf (tmp,"Truncated mix %s record: %.512s",type,buf);
MM_LOG (tmp,WARN);
return buf; /* pass to caller anyway */
}
}
buf[0] = '\0'; /* return empty buffer on EOF */
return buf;
}
/* MIX read sequence record
* Accepts: open FILE
* Returns: sequence value, or NIL if failure
*/
unsigned long mix_read_sequence (FILE *f)
{
unsigned long ret;
char *s,tmp[MAILTMPLEN];
if (!mix_read_record (f,tmp,MAILTMPLEN-1,"sequence")) return NIL;
switch (tmp[0]) { /* examine record */
case '\0': /* end of file */
ret = 1; /* start a new sequence regime */
break;
case 'S': /* sequence record */
if (isxdigit (tmp[1])) { /* must be followed by hex value */
ret = strtoul (tmp+1,&s,16);
if (!*s) break; /* and nothing more */
}
/* drop into default case */
default: /* anything else is an error */
return NIL; /* return error */
}
return ret;
}
/* MIX internal routines */
/* MIX mail build directory name
* Accepts: destination string
* source
* Returns: destination or empty string if error
*/
char *mix_dir (char *dst,char *name)
{
char *s;
/* empty string if mailboxfile fails */
if (!mailboxfile (dst,name)) *dst = '\0';
/* driver-selected INBOX */
else if (!*dst) mailboxfile (dst,"~/INBOX");
/* tie off unnecessary trailing / */
else if ((s = strrchr (dst,'/')) && !s[1]) *s = '\0';
return dst;
}
/* MIX mail build file name
* Accepts: destination string
* directory name
* file name
* Returns: destination
*/
char *mix_file (char *dst,char *dir,char *name)
{
sprintf (dst,"%.500s/%.80s%.80s",dir,MIXNAME,name);
return dst;
}
/* MIX mail build file name from data file number
* Accepts: destination string
* directory name
* data file number
* Returns: destination
*/
char *mix_file_data (char *dst,char *dir,unsigned long data)
{
char tmp[MAILTMPLEN];
if (data) sprintf (tmp,"%08lx",data);
else tmp[0] = '\0'; /* compatibility with experimental version */
return mix_file (dst,dir,tmp);
}
/* MIX mail get new modseq
* Accepts: old modseq
* Returns: new modseq value
*/
unsigned long mix_modseq (unsigned long oldseq)
{
/* normally time now */
unsigned long ret = (unsigned long) time (NIL);
/* ensure that modseq doesn't go backwards */
if (ret <= oldseq) ret = oldseq + 1;
return ret;
}
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