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/* ========================================================================
* Copyright 1988-2006 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: MTX mail routines
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 24 June 1992
* Last Edited: 30 August 2006
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include "mail.h"
#include "osdep.h"
#include <time.h>
#include <sys\stat.h>
#include <dos.h>
#include "rfc822.h"
#include "dummy.h"
#include "misc.h"
#include "fdstring.h"
/* MTX I/O stream local data */
typedef struct mtx_local {
int fd; /* file descriptor for I/O */
off_t filesize; /* file size parsed */
unsigned char *buf; /* temporary buffer */
} MTXLOCAL;
/* Drive-dependent data passed to init method */
typedef struct mtx_data {
int fd; /* file data */
unsigned long pos; /* initial position */
} MTXDATA;
/* Convenient access to local data */
#define LOCAL ((MTXLOCAL *) stream->local)
/* Function prototypes */
DRIVER *mtx_valid (char *name);
long mtx_isvalid (char *name,char *tmp);
void *mtx_parameters (long function,void *value);
void mtx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
void mtx_list (MAILSTREAM *stream,char *ref,char *pat);
void mtx_lsub (MAILSTREAM *stream,char *ref,char *pat);
long mtx_create (MAILSTREAM *stream,char *mailbox);
long mtx_delete (MAILSTREAM *stream,char *mailbox);
long mtx_rename (MAILSTREAM *stream,char *old,char *newname);
MAILSTREAM *mtx_open (MAILSTREAM *stream);
void mtx_close (MAILSTREAM *stream,long options);
char *mtx_header (MAILSTREAM *stream,unsigned long msgno,
unsigned long *length,long flags);
long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
long mtx_ping (MAILSTREAM *stream);
void mtx_check (MAILSTREAM *stream);
long mtx_expunge (MAILSTREAM *stream,char *sequence,long options);
long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
char *mtx_file (char *dst,char *name);
long mtx_badname (char *tmp,char *s);
long mtx_parse (MAILSTREAM *stream);
void mtx_update_status (MAILSTREAM *stream,unsigned long msgno);
unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
unsigned long *size);
/* MTX mail routines */
/* Driver dispatch used by MAIL */
DRIVER mtxdriver = {
"mtx", /* driver name */
/* driver flags */
DR_LOCAL|DR_MAIL|DR_LOWMEM|DR_CRLF|DR_NOSTICKY,
(DRIVER *) NIL, /* next driver */
mtx_valid, /* mailbox is valid for us */
mtx_parameters, /* manipulate parameters */
mtx_scan, /* scan mailboxes */
mtx_list, /* list mailboxes */
mtx_lsub, /* list subscribed mailboxes */
NIL, /* subscribe to mailbox */
NIL, /* unsubscribe from mailbox */
mtx_create, /* create mailbox */
mtx_delete, /* delete mailbox */
mtx_rename, /* rename mailbox */
mail_status_default, /* status of mailbox */
mtx_open, /* open mailbox */
mtx_close, /* close mailbox */
NIL, /* fetch message "fast" attributes */
NIL, /* fetch message flags */
NIL, /* fetch overview */
NIL, /* fetch message envelopes */
mtx_header, /* fetch message header */
mtx_text, /* fetch message body */
NIL, /* fetch partial message text */
NIL, /* unique identifier */
NIL, /* message number */
NIL, /* modify flags */
mtx_flagmsg, /* per-message modify flags */
NIL, /* search for message based on criteria */
NIL, /* sort messages */
NIL, /* thread messages */
mtx_ping, /* ping mailbox to see if still alive */
mtx_check, /* check for new messages */
mtx_expunge, /* expunge deleted messages */
mtx_copy, /* copy messages to another mailbox */
mtx_append, /* append string message to mailbox */
NIL /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM mtxproto = {&mtxdriver};
/* MTX mail validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *mtx_valid (char *name)
{
char tmp[MAILTMPLEN];
return mtx_isvalid (name,tmp) ? &mtxdriver : (DRIVER *) NIL;
}
/* MTX mail test for valid mailbox
* Accepts: mailbox name
* Returns: T if valid, NIL otherwise
*/
long mtx_isvalid (char *name,char *tmp)
{
int fd;
long ret = NIL;
char *s;
struct stat sbuf;
errno = EINVAL; /* assume invalid argument */
/* if file, get its status */
if ((*name != '{') && mailboxfile (tmp,name) && !stat (tmp,&sbuf)) {
if (!sbuf.st_size)errno = 0;/* empty file */
else if ((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) >= 0) {
memset (tmp,'\0',MAILTMPLEN);
if ((read (fd,tmp,64) >= 0) && (s = strchr (tmp,'\015')) &&
(s[1] == '\012')) { /* valid format? */
*s = '\0'; /* tie off header */
/* must begin with dd-mmm-yy" */
ret = (((tmp[2] == '-' && tmp[6] == '-') ||
(tmp[1] == '-' && tmp[5] == '-')) &&
(s = strchr (tmp+18,',')) && strchr (s+2,';')) ? T : NIL;
}
else errno = -1; /* bogus format */
close (fd); /* close the file */
}
}
/* in case INBOX but not mtx format */
else if ((errno == ENOENT) && ((name[0] == 'I') || (name[0] == 'i')) &&
((name[1] == 'N') || (name[1] == 'n')) &&
((name[2] == 'B') || (name[2] == 'b')) &&
((name[3] == 'O') || (name[3] == 'o')) &&
((name[4] == 'X') || (name[4] == 'x')) && !name[5]) errno = -1;
return ret; /* return what we should */
}
/* MTX manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *mtx_parameters (long function,void *value)
{
return NIL;
}
/* MTX mail scan mailboxes
* Accepts: mail stream
* reference
* pattern to search
* string to scan
*/
void mtx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
if (stream) dummy_scan (NIL,ref,pat,contents);
}
/* MTX mail list mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mtx_list (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_list (stream,ref,pat);
}
/* MTX mail list subscribed mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mtx_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_lsub (stream,ref,pat);
}
/* MTX mail create mailbox
* Accepts: MAIL stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long mtx_create (MAILSTREAM *stream,char *mailbox)
{
return dummy_create (stream,mailbox);
}
/* MTX mail delete mailbox
* Accepts: MAIL stream
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long mtx_delete (MAILSTREAM *stream,char *mailbox)
{
return dummy_delete (stream,mailbox);
}
/* MTX mail rename mailbox
* Accepts: MAIL stream
* old mailbox name
* new mailbox name (or NIL for delete)
* Returns: T on success, NIL on failure
*/
long mtx_rename (MAILSTREAM *stream,char *old,char *newname)
{
return dummy_rename (stream,old,newname);
}
/* MTX mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *mtx_open (MAILSTREAM *stream)
{
long i;
int fd;
char *s;
char tmp[MAILTMPLEN];
/* return prototype for OP_PROTOTYPE call */
if (!stream) return &mtxproto;
if (stream->local) fatal ("mtx recycle stream");
if (!mailboxfile (tmp,stream->mailbox))
return (MAILSTREAM *) mtx_badname (tmp,stream->mailbox);
/* open, possibly creating INBOX */
if (((fd = open (tmp,O_BINARY|(stream->rdonly ? O_RDONLY:O_RDWR),NIL)) < 0)&&
(compare_cstring (stream->mailbox,"INBOX") ||
((fd = open (tmp,O_BINARY|O_RDWR|O_CREAT|O_EXCL,S_IREAD|S_IWRITE))<0))){
sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
stream->local = fs_get (sizeof (MTXLOCAL));
/* canonicalize the stream mailbox name */
fs_give ((void **) &stream->mailbox);
if (s = strchr ((s = strrchr (tmp,'\\')) ? s : tmp,'.')) *s = '\0';
stream->mailbox = cpystr (tmp);
LOCAL->fd = fd; /* note the file */
LOCAL->filesize = 0; /* initialize parsed file size */
LOCAL->buf = NIL; /* initially no local buffer */
stream->sequence++; /* bump sequence number */
stream->uid_validity = time (0);
/* parse mailbox */
stream->nmsgs = stream->recent = 0;
if (!mtx_ping (stream)) return NIL;
if (!stream->nmsgs) mm_log ("Mailbox is empty",(long) NIL);
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;
return stream; /* return stream to caller */
}
/* MTX mail close
* Accepts: MAIL stream
* close options
*/
void mtx_close (MAILSTREAM *stream,long options)
{
if (stream && LOCAL) { /* only if a file is open */
int silent = stream->silent;
stream->silent = T;
if (options & CL_EXPUNGE) mtx_expunge (stream,NIL,NIL);
close (LOCAL->fd); /* close the local file */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
/* nuke the local data */
fs_give ((void **) &stream->local);
stream->dtb = NIL; /* log out the DTB */
}
}
/* MTX 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 *mtx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
long flags)
{
*length = 0; /* default to empty */
if (flags & FT_UID) return "";/* UID call "impossible" */
/* get to header position */
lseek (LOCAL->fd,mtx_hdrpos (stream,msgno,length),L_SET);
/* is buffer big enough? */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
LOCAL->buf = (char *) fs_get ((size_t) *length + 1);
LOCAL->buf[*length] = '\0'; /* tie off string */
/* slurp the data */
read (LOCAL->fd,LOCAL->buf,(size_t) *length);
return LOCAL->buf;
}
/* MTX mail fetch message text (body only)
* Accepts: MAIL stream
* message # to fetch
* pointer to returned header text length
* option flags
* Returns: T, always
*/
long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
{
MESSAGECACHE *elt;
FDDATA d;
unsigned long hdrsize,hdrpos;
/* UID call "impossible" */
if (flags & FT_UID) return NIL;
elt = mail_elt (stream,msgno);/* if message not seen */
if (elt->seen && !(flags & FT_PEEK)) {
elt->seen = T; /* mark message as seen */
/* recalculate status */
mtx_update_status (stream,msgno);
mm_flags (stream,msgno);
}
/* get location of text data */
hdrpos = mtx_hdrpos (stream,msgno,&hdrsize);
d.fd = LOCAL->fd; /* set initial stringstruct */
d.pos = hdrpos + hdrsize;
/* flush old buffer */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
d.chunk = LOCAL->buf = (char *) fs_get ((size_t) d.chunksize = CHUNKSIZE);
INIT (bs,fd_string,(void *) &d,elt->rfc822_size - hdrsize);
return T; /* success */
}
/* MTX mail per-message modify flags
* Accepts: MAIL stream
* message cache element
*/
void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
{
/* recalculate status */
mtx_update_status (stream,elt->msgno);
}
/* MTX mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream still alive, NIL if not
*/
long mtx_ping (MAILSTREAM *stream)
{
/* punt if stream no longer alive */
if (!(stream && LOCAL)) return NIL;
/* parse mailbox, punt if parse dies */
return (mtx_parse (stream)) ? T : NIL;
}
/* MTX mail check mailbox (reparses status too)
* Accepts: MAIL stream
*/
void mtx_check (MAILSTREAM *stream)
{
unsigned long i = 1;
if (mtx_ping (stream)) { /* ping mailbox */
/* get new message status */
while (i <= stream->nmsgs) mail_elt (stream,i++);
mm_log ("Check completed",(long) NIL);
}
}
/* MTX mail expunge mailbox
* Accepts: MAIL stream
* sequence to expunge if non-NIL
* expunge options
* Returns: T, always
*/
long mtx_expunge (MAILSTREAM *stream,char *sequence,long options)
{
long ret;
unsigned long i = 1;
unsigned long j,k,m,recent;
unsigned long n = 0;
unsigned long delta = 0;
MESSAGECACHE *elt;
char tmp[MAILTMPLEN];
if (!(ret = (sequence ? ((options & EX_UID) ?
mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence)) : LONGT) &&
mtx_ping (stream))); /* parse sequence if given, ping stream */
else if (stream->rdonly) mm_log ("Expunge ignored on readonly mailbox",WARN);
else {
mm_critical (stream); /* go critical */
recent = stream->recent; /* get recent now that pinged */
while (i <= stream->nmsgs) {/* for each message */
elt = mail_elt (stream,i);/* get cache element */
/* number of bytes to smash or preserve */
k = elt->private.special.text.size + elt->rfc822_size;
/* if need to expunge this message */
if (elt->deleted && (sequence ? elt->sequence : T)) {
/* if recent, note one less recent message */
if (elt->recent) --recent;
delta += k; /* number of bytes to delete */
/* notify upper levels */
mail_expunged (stream,i);
n++; /* count up one more deleted message */
}
else if (i++ && delta) { /* preserved message */
/* first byte to preserve */
j = elt->private.special.offset;
do { /* read from source position */
m = min (k,(unsigned long) MAILTMPLEN);
lseek (LOCAL->fd,j,SEEK_SET);
read (LOCAL->fd,tmp,(size_t) m);
/* write to destination position */
lseek (LOCAL->fd,j - delta,SEEK_SET);
write (LOCAL->fd,tmp,(size_t) m);
j += m; /* next chunk, perhaps */
} while (k -= m); /* until done */
elt->private.special.offset -= delta;
}
}
if (n) { /* truncate file after last message */
chsize (LOCAL->fd,LOCAL->filesize -= delta);
sprintf (tmp,"Expunged %ld messages",n);
mm_log (tmp,(long) NIL); /* output the news */
}
else mm_log ("No messages deleted, so no update needed",(long) NIL);
mm_nocritical (stream); /* release critical */
/* notify upper level of new mailbox size */
mail_exists (stream,stream->nmsgs);
mail_recent (stream,recent);
}
return ret;
}
/* MTX mail copy message(s)
* Accepts: MAIL stream
* sequence
* destination mailbox
* copy options
* Returns: T if success, NIL if failed
*/
long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
char tmp[MAILTMPLEN];
struct stat sbuf;
MESSAGECACHE *elt;
unsigned long i,j,k;
long ret = LONGT;
int fd;
mailproxycopy_t pc =
(mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))) return NIL;
if (!mtx_isvalid (mailbox,tmp)) switch (errno) {
case ENOENT: /* no such file? */
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",
(long) NIL);
return NIL;
case 0: /* merely empty file? */
break;
case EINVAL: /* name is bogus */
if (pc) return (*pc) (stream,sequence,mailbox,options);
return mtx_badname (tmp,mailbox);
default: /* file exists, but not valid format */
if (pc) return (*pc) (stream,sequence,mailbox,options);
sprintf (tmp,"Not a MTX-format mailbox: %s",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
/* open the destination */
if (!mailboxfile (tmp,mailbox) ||
(fd = open (tmp,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
S_IREAD|S_IWRITE)) < 0) {
sprintf (tmp,"Unable to open copy mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
mm_critical (stream); /* go critical */
fstat (fd,&sbuf); /* get current file size */
/* for each requested message */
for (i = 1; ret && (i <= stream->nmsgs); i++)
if ((elt = mail_elt (stream,i))->sequence) {
lseek (LOCAL->fd,elt->private.special.offset,SEEK_SET);
/* number of bytes to copy */
k = elt->private.special.text.size + elt->rfc822_size;
do { /* read from source position */
j = min (k,(long) MAILTMPLEN);
read (LOCAL->fd,tmp,(size_t) j);
if (write (fd,tmp,(size_t) j) < 0) {
sprintf (tmp,"Unable to write message: %s",strerror (errno));
mm_log (tmp,ERROR);
chsize (fd,sbuf.st_size);
j = k;
ret = NIL; /* note error */
break;
}
} while (k -= j); /* until done */
}
close (fd); /* close the file */
mm_nocritical (stream); /* release critical */
/* delete all requested messages */
if (ret && (options & CP_MOVE)) for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
elt->deleted = T; /* mark message deleted */
/* recalculate status */
mtx_update_status (stream,i);
}
if (ret && mail_parameters (NIL,GET_COPYUID,NIL))
mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN);
return ret;
}
/* MTX mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* append callback
* data for callback
* Returns: T if append successful, else NIL
*/
long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
struct stat sbuf;
int fd,ld,c;
char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN];
FILE *df;
MESSAGECACHE elt;
long f;
unsigned long i,uf;
STRING *message;
long ret = LONGT;
/* default stream to prototype */
if (!stream) stream = &mtxproto;
/* make sure valid mailbox */
if (!mtx_isvalid (mailbox,tmp)) switch (errno) {
case ENOENT: /* no such file? */
if (((mailbox[0] == 'I') || (mailbox[0] == 'i')) &&
((mailbox[1] == 'N') || (mailbox[1] == 'n')) &&
((mailbox[2] == 'B') || (mailbox[2] == 'b')) &&
((mailbox[3] == 'O') || (mailbox[3] == 'o')) &&
((mailbox[4] == 'X') || (mailbox[4] == 'x')) && !mailbox[5])
dummy_create (NIL,"INBOX.MTX");
else {
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
return NIL;
}
/* falls through */
case 0: /* merely empty file? */
break;
case EINVAL:
return mtx_badname (tmp,mailbox);
default:
sprintf (tmp,"Not a MTX-format mailbox: %.80s",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
/* get first message */
if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
/* open destination mailbox */
if (!mailboxfile (file,mailbox) ||
((fd = open (file,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
S_IREAD|S_IWRITE)) < 0) || !(df = fdopen (fd,"ab"))) {
sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
mm_critical (stream); /* go critical */
fstat (fd,&sbuf); /* get current file size */
errno = 0;
do { /* parse flags */
if (!SIZE (message)) { /* guard against zero-length */
mm_log ("Append of zero-length message",ERROR);
ret = NIL;
break;
}
f = mail_parse_flags (stream,flags,&i);
/* reverse bits (dontcha wish we had CIRC?) */
for (uf = 0; i; uf |= 1 << (29 - find_rightmost_bit (&i)));
if (date) { /* parse date if given */
if (!mail_parse_date (&elt,date)) {
sprintf (tmp,"Bad date in append: %.80s",date);
mm_log (tmp,ERROR);
ret = NIL; /* mark failure */
break;
}
mail_date (tmp,&elt); /* write preseved date */
}
else internal_date (tmp); /* get current date in IMAP format */
/* write header */
if (fprintf (df,"%s,%lu;%010lo%02lo\015\012",tmp,i = SIZE (message),uf,
(unsigned long) f) < 0) ret = NIL;
else { /* write message */
if (i) do c = 0xff & SNX (message);
while ((putc (c,df) != EOF) && --i);
/* get next message */
if (i || !(*af) (stream,data,&flags,&date,&message)) ret = NIL;
}
} while (ret && message);
/* revert file if failure */
if (!ret || (fflush (df) == EOF)) {
chsize (fd,sbuf.st_size); /* revert file */
close (fd); /* make sure fclose() doesn't corrupt us */
if (errno) {
sprintf (tmp,"Message append failed: %s",strerror (errno));
mm_log (tmp,ERROR);
}
ret = NIL;
}
fclose (df); /* close the file */
mm_nocritical (stream); /* release critical */
if (ret && mail_parameters (NIL,GET_APPENDUID,NIL))
mm_log ("Can not return meaningful APPENDUID with this mailbox format",
WARN);
return ret;
}
/* Return bad file name error message
* Accepts: temporary buffer
* file name
* Returns: long NIL always
*/
long mtx_badname (char *tmp,char *s)
{
sprintf (tmp,"Invalid mailbox name: %s",s);
mm_log (tmp,ERROR);
return (long) NIL;
}
/* Parse mailbox
* Accepts: MAIL stream
* Returns: T if parse OK
* NIL if failure, stream aborted
*/
long mtx_parse (MAILSTREAM *stream)
{
struct stat sbuf;
MESSAGECACHE *elt = NIL;
unsigned char *s,*t,*x,lbuf[65];
char tmp[MAILTMPLEN];
long i;
long curpos = LOCAL->filesize;
long nmsgs = stream->nmsgs;
long recent = stream->recent;
fstat (LOCAL->fd,&sbuf); /* get status */
if (sbuf.st_size < curpos) { /* sanity check */
sprintf (tmp,"Mailbox shrank from %ld to %ld!",curpos,sbuf.st_size);
mm_log (tmp,ERROR);
mtx_close (stream,NIL);
return NIL;
}
/* while there is stuff to parse */
while (i = sbuf.st_size - curpos) {
/* get to that position in the file */
lseek (LOCAL->fd,curpos,SEEK_SET);
if ((i = read (LOCAL->fd,lbuf,64)) <= 0) {
sprintf (tmp,"Unable to read internal header at %ld, size = %ld: %s",
curpos,sbuf.st_size,i ? strerror (errno) : "no data read");
mm_log (tmp,ERROR);
mtx_close (stream,NIL);
return NIL;
}
lbuf[i] = '\0'; /* tie off buffer just in case */
if (!((s = strchr (lbuf,'\015')) && (s[1] == '\012'))) {
sprintf (tmp,"Unable to find end of line at %ld in %ld bytes, text: %s",
curpos,i,(char *) lbuf);
mm_log (tmp,ERROR);
mtx_close (stream,NIL);
return NIL;
}
*s = '\0'; /* tie off header line */
i = (s + 2) - lbuf; /* note start of text offset */
if (!((s = strchr (lbuf,',')) && (t = strchr (s+1,';')))) {
sprintf (tmp,"Unable to parse internal header at %ld: %s",curpos,
(char *) lbuf);
mm_log (tmp,ERROR);
mtx_close (stream,NIL);
return NIL;
}
*s++ = '\0'; *t++ = '\0'; /* tie off fields */
/* intantiate an elt for this message */
(elt = mail_elt (stream,++nmsgs))->valid = T;
elt->private.uid = ++stream->uid_last;
/* note file offset of header */
elt->private.special.offset = curpos;
/* as well as offset from header of message */
elt->private.special.text.size = i;
/* header size not known yet */
elt->private.msg.header.text.size = 0;
/* parse the header components */
if (!(mail_parse_date (elt,lbuf) &&
(elt->rfc822_size = strtol (x = s,(char **) &s,10)) && (!(s && *s))&&
isdigit (t[0]) && 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]) && !t[12])) {
sprintf (tmp,"Unable to parse internal header elements at %ld: %s,%s;%s",
curpos,(char *) lbuf,(char *) x,(char *) t);
mtx_close (stream,NIL);
return NIL;
}
/* update current position to next header */
curpos += i + elt->rfc822_size;
/* calculate system flags */
if ((i = ((t[10]-'0') * 8) + t[11]-'0') & fSEEN) elt->seen = T;
if (i & fDELETED) elt->deleted = T;
if (i & fFLAGGED) elt->flagged = T;
if (i & fANSWERED) elt->answered = T;
if (i & fDRAFT) elt->draft = T;
if (curpos > sbuf.st_size) {
sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
elt->private.special.offset,curpos,sbuf.st_size);
mm_log (tmp,ERROR);
mtx_close (stream,NIL);
return NIL;
}
}
/* update parsed file size */
LOCAL->filesize = sbuf.st_size;
mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
mail_recent (stream,recent); /* and of change in recent messages */
return T; /* return the winnage */
}
/* Update status string
* Accepts: MAIL stream
* message number
*/
void mtx_update_status (MAILSTREAM *stream,unsigned long msgno)
{
char tmp[MAILTMPLEN];
MESSAGECACHE *elt = mail_elt (stream,msgno);
unsigned long j,k = 0;
/* not if readonly you don't */
if (stream->rdonly || !elt->valid) return;
j = elt->user_flags; /* get user flags */
/* reverse bits (dontcha wish we had CIRC?) */
while (j) k |= 1 << 29 - find_rightmost_bit (&j);
sprintf (tmp,"%010lo%02o",k, /* print new flag string */
fOLD + (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
(fDRAFT * elt->draft));
/* get to that place in the file */
lseek (LOCAL->fd,(off_t) elt->private.special.offset +
elt->private.special.text.size - 14,SEEK_SET);
write (LOCAL->fd,tmp,12); /* write new flags */
}
/* MTX locate header for a message
* Accepts: MAIL stream
* message number
* pointer to returned header size
* Returns: position of header in file
*/
unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
unsigned long *size)
{
unsigned long siz;
size_t i = 0;
int q = 0;
char *s,tmp[MAILTMPLEN];
MESSAGECACHE *elt = mail_elt (stream,msgno);
long pos = elt->private.special.offset + elt->private.special.text.size;
/* is header size known? */
if (!(*size = elt->private.msg.header.text.size)) {
/* get to header position */
lseek (LOCAL->fd,pos,SEEK_SET);
/* search message for CRLF CRLF */
for (siz = 1; siz <= elt->rfc822_size; siz++) {
if (!i && /* buffer empty? */
(read (LOCAL->fd,s = tmp,
i = (size_t) min(elt->rfc822_size-siz,(long)MAILTMPLEN))<= 0))
return pos;
else i--;
switch (q) { /* sniff at buffer */
case 0: /* first character */
q = (*s++ == '\015') ? 1 : 0;
break;
case 1: /* second character */
q = (*s++ == '\012') ? 2 : 0;
break;
case 2: /* third character */
q = (*s++ == '\015') ? 3 : 0;
break;
case 3: /* fourth character */
if (*s++ == '\012') { /* have the sequence? */
/* yes, note for later */
elt->private.msg.header.text.size = (*size = siz);
return pos; /* return to caller */
}
q = 0; /* lost... */
break;
}
}
}
return pos; /* have position */
}
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