/*
* Program: MBX 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: 3 October 1995
* Last Edited: 4 January 1996
*
* Copyright 1996 by the University of Washington
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notice appears in all copies and that both the
* above copyright notice and this permission notice appear in supporting
* documentation, and that the name of the University of Washington not be
* used in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. This software is made
* available "as is", and
* THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
* WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
* NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
* (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#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 "mbx.h"
#include "rfc822.h"
#include "misc.h"
#include "dummy.h"
/* MBX mail routines */
/* Driver dispatch used by MAIL */
DRIVER mbxdriver = {
"mbx", /* driver name */
DR_NAMESPACE|DR_LOCAL|DR_MAIL,/* driver flags */
(DRIVER *) NIL, /* next driver */
mbx_valid, /* mailbox is valid for us */
mbx_parameters, /* manipulate parameters */
mbx_scan, /* scan mailboxes */
mbx_list, /* list mailboxes */
mbx_lsub, /* list subscribed mailboxes */
NIL, /* subscribe to mailbox */
NIL, /* unsubscribe from mailbox */
mbx_create, /* create mailbox */
mbx_delete, /* delete mailbox */
mbx_rename, /* rename mailbox */
NIL, /* status of mailbox */
mbx_open, /* open mailbox */
mbx_close, /* close mailbox */
mbx_fetchfast, /* fetch message "fast" attributes */
mbx_fetchflags, /* fetch message flags */
mbx_fetchstructure, /* fetch message envelopes */
mbx_fetchheader, /* fetch message header only */
mbx_fetchtext, /* fetch message body only */
mbx_fetchbody, /* fetch message body section */
NIL, /* unique identifier */
mbx_setflag, /* set message flag */
mbx_clearflag, /* clear message flag */
NIL, /* search for message based on criteria */
mbx_ping, /* ping mailbox to see if still alive */
mbx_check, /* check for new messages */
mbx_expunge, /* expunge deleted messages */
mbx_copy, /* copy messages to another mailbox */
mbx_append, /* append string message to mailbox */
mbx_gc /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM mbxproto = {&mbxdriver};
/* MBX mail validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *mbx_valid (char *name)
{
char tmp[MAILTMPLEN];
return mbx_isvalid (name,tmp,T) ? &mbxdriver : NIL;
}
/* MBX mail test for valid mailbox
* Accepts: mailbox name
* scratch buffer
* non-zero if syntax-only parse
* Returns: T if valid, NIL otherwise
*/
int mbx_isvalid (char *name,char *tmp,long synonly)
{
int fd;
int ret = NIL;
char *s,hdr[HDRSIZE];
struct stat sbuf;
time_t tp[2];
errno = EINVAL; /* assume invalid argument */
/* if file, get its status */
if ((*name != '{') && (s = mbx_file (tmp,name))) {
/* done if syntax-only and namespace */
if (synonly && ((*name == '#') && ((name[1] == 'm') || (name[1] == 'M')) &&
((name[2] == 'b') || (name[2] == 'B')) &&
((name[3] == 'x') || (name[3] == 'X')) &&
(name[4] == '/'))) ret = T;
else if (!stat (s,&sbuf) && (fd = open (tmp,O_RDONLY,NIL)) >= 0) {
errno = -1; /* bogus format */
if (read (fd,hdr,HDRSIZE) == HDRSIZE)
if ((hdr[0] == '*') && (hdr[1] == 'm') && (hdr[2] == 'b') &&
(hdr[3] == 'x') && (hdr[4] == '*') && (hdr[5] == '\015') &&
(hdr[6] == '\012') && isxdigit (hdr[7]) && isxdigit (hdr[8]))
if (isxdigit (hdr[9]) && isxdigit (hdr[10]) && isxdigit (hdr[11]) &&
isxdigit (hdr[12]) && isxdigit (hdr[13]) && isxdigit (hdr[14]) &&
isxdigit (hdr[15]) && isxdigit (hdr[16]))
if (isxdigit (hdr[17]) && isxdigit (hdr[18]) &&
isxdigit (hdr[19]) && isxdigit (hdr[20]) &&
isxdigit (hdr[21]) && isxdigit (hdr[22]) &&
(hdr[23] == '\015') && (hdr[24] == '\012')) ret = T;
close (fd); /* close the file */
tp[0] = sbuf.st_atime; /* preserve atime and mtime */
tp[1] = sbuf.st_mtime;
utime (tmp,tp); /* set the times */
}
}
return ret; /* return what we should */
}
/* MBX manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *mbx_parameters (long function,void *value)
{
return NIL;
}
/* MBX mail scan mailboxes
* Accepts: mail stream
* reference
* pattern to search
* string to scan
*/
void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
if (stream) dummy_scan (NIL,ref,pat,contents);
}
/* MBX mail list mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mbx_list (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_list (NIL,ref,pat);
}
/* MBX mail list subscribed mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_lsub (NIL,ref,pat);
}
/* MBX mail create mailbox
* Accepts: MAIL stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long mbx_create (MAILSTREAM *stream,char *mailbox)
{
char *s,*t,mbx[MAILTMPLEN],tmp[HDRSIZE];
long ret = NIL;
int i,fd;
if (!(s = mbx_file (mbx,mailbox))) {
sprintf (mbx,"Can't create %s: invalid name",mailbox);
mm_log (mbx,ERROR);
return NIL;
}
/* create underlying file */
if (!dummy_create (stream,s)) return NIL;
/* done if made directory */
if ((s = strrchr (s,'/')) && !s[1]) return T;
if ((fd = open (mbx,O_WRONLY,
(int) mail_parameters (NIL,GET_MBXPROTECTION,NIL))) < 0) {
sprintf (tmp,"Can't reopen mailbox node %s: %s",mbx,strerror (errno));
mm_log (tmp,ERROR);
unlink (mbx); /* delete the file */
return NIL;
}
memset (tmp,'\0',HDRSIZE); /* initialize header */
strcpy (s = tmp,"*mbx*\015\0120000000100000000\015\012");
for (i = 0; i < NUSERFLAGS; ++i)
sprintf (s += strlen (s),"%s\015\012",(t = default_user_flag(i)) ? t : "");
if (write (fd,tmp,HDRSIZE) != HDRSIZE) {
sprintf (tmp,"Can't initialize mailbox node %s: %s",mbx,strerror (errno));
mm_log (tmp,ERROR);
unlink (mbx); /* delete the file */
return NIL;
}
return close (fd) ? NIL : T; /* close file */
}
/* MBX mail delete mailbox
* Accepts: MAIL stream
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long mbx_delete (MAILSTREAM *stream,char *mailbox)
{
return mbx_rename (stream,mailbox,NIL);
}
/* MBX mail rename mailbox
* Accepts: MAIL stream
* old mailbox name
* new mailbox name (or NIL for delete)
* Returns: T on success, NIL on failure
*/
long mbx_rename (MAILSTREAM *stream,char *old,char *newname)
{
long ret = T;
char *s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
int ld;
int fd = open (mbx_file (file,old),O_RDWR,NIL);
/* lock out non c-client applications */
if (fd < 0) { /* open mailbox */
sprintf (tmp,"Can't open mailbox %s: %s",old,strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
/* get parse/append permission */
if ((ld = mbx_lock (fd,lock)) < 0) {
mm_log ("Unable to lock rename mailbox",ERROR);
return NIL;
}
/* lock out other users */
if (flock (fd,LOCK_EX|LOCK_NB)) {
close (fd); /* couldn't lock, give up on it then */
sprintf (tmp,"Mailbox %s is in use by another process",old);
mm_log (tmp,ERROR);
mbx_unlock (ld,lock); /* release exclusive parse/append permission */
return NIL;
}
if (newname) { /* want rename? */
if (!((s = mbx_file (tmp,newname)) && *s)) {
sprintf (tmp,"Can't rename mailbox %s to %s: invalid name",old,newname);
mm_log (tmp,ERROR);
ret = NIL; /* set failure */
}
if (rename (file,s)) { /* rename the file */
sprintf (tmp,"Can't rename mailbox %s to %s: %s",old,newname,
strerror (errno));
mm_log (tmp,ERROR);
ret = NIL; /* set failure */
}
}
else if (unlink (file)) {
sprintf (tmp,"Can't delete mailbox %s: %s",old,strerror (errno));
mm_log (tmp,ERROR);
ret = NIL; /* set failure */
}
flock (fd,LOCK_UN); /* release lock on the file */
mbx_unlock (ld,lock); /* release exclusive parse/append permission */
close (fd); /* close the file */
/* recreate file if renamed INBOX */
if (ret && !strcmp (ucase (strcpy (tmp,old)),"INBOX"))
mbx_create (NIL,"#mbx/INBOX");
return ret; /* return success */
}
/* MBX mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *mbx_open (MAILSTREAM *stream)
{
int fd,ld;
char tmp[MAILTMPLEN];
/* return prototype for OP_PROTOTYPE call */
if (!stream) return user_flags (&mbxproto);
if (LOCAL) { /* close old file if stream being recycled */
mbx_close (stream,NIL); /* dump and save the changes */
stream->dtb = &mbxdriver; /* reattach this driver */
mail_free_cache (stream); /* clean up cache */
}
if (stream->rdonly ||
(fd = open (mbx_file (tmp,stream->mailbox),O_RDWR,NIL)) < 0) {
if ((fd = open (mbx_file (tmp,stream->mailbox),O_RDONLY,NIL)) < 0) {
sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
else if (!stream->rdonly) { /* got it, but readonly */
mm_log ("Can't get write access to mailbox, access is readonly",WARN);
stream->rdonly = T;
}
}
stream->local = fs_get (sizeof (MBXLOCAL));
LOCAL->buf = (char *) fs_get (MAXMESSAGESIZE + 1);
LOCAL->buflen = MAXMESSAGESIZE;
LOCAL->hdr = LOCAL->txt = NIL;/* no cached data yet */
LOCAL->hdrmsgno = LOCAL->txtmsgno = 0;
/* note if an INBOX or not */
LOCAL->inbox = !strcmp (ucase (strcpy (LOCAL->buf,stream->mailbox)),"INBOX");
fs_give ((void **) &stream->mailbox);
stream->mailbox = cpystr (tmp);
/* get parse/append permission */
if ((ld = mbx_lock (fd,tmp)) < 0) {
mm_log ("Unable to lock open mailbox",ERROR);
return NIL;
}
flock(LOCAL->fd = fd,LOCK_SH);/* bind and lock the file */
mbx_unlock (ld,tmp); /* release shared parse permission */
LOCAL->filesize = HDRSIZE; /* initialize parsed file size */
LOCAL->filetime = 0; /* time not set up yet */
LOCAL->mustcheck = LOCAL->shouldcheck = LOCAL->newkeyword = NIL;
stream->sequence++; /* bump sequence number */
/* parse mailbox */
stream->nmsgs = stream->recent = 0;
if (mbx_ping (stream) && !stream->nmsgs)
mm_log ("Mailbox is empty",(long) NIL);
if (!LOCAL) return NIL; /* failure if stream died */
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 = (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ?
NIL : T; /* can we create new user flags? */
return stream; /* return stream to caller */
}
/* MBX mail close
* Accepts: MAIL stream
* close options
*/
void mbx_close (MAILSTREAM *stream,long options)
{
if (stream && LOCAL) { /* only if a file is open */
int silent = stream->silent;
stream->silent = T; /* note this stream is dying */
if (options & CL_EXPUNGE) mbx_expunge (stream);
stream->silent = silent; /* restore previous status */
flock (LOCAL->fd,LOCK_UN); /* unlock local file */
close (LOCAL->fd); /* close the local file */
/* free local text buffer */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
if (LOCAL->hdr) fs_give ((void **) &LOCAL->hdr);
if (LOCAL->txt) fs_give ((void **) &LOCAL->txt);
/* nuke the local data */
fs_give ((void **) &stream->local);
stream->dtb = NIL; /* log out the DTB */
}
}
/* MBX mail fetch fast information
* Accepts: MAIL stream
* sequence
* option flags
*/
void mbx_fetchfast (MAILSTREAM *stream,char *sequence,long flags)
{
return; /* no-op for local mail */
}
/* MBX mail fetch flags
* Accepts: MAIL stream
* sequence
*/
void mbx_fetchflags (MAILSTREAM *stream,char *sequence,long flags)
{
long i;
if (mbx_ping (stream) && /* ping mailbox, get new status for messages */
((flags & FT_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence)))
for (i = 1; i <= stream->nmsgs; i++)
if (mail_elt (stream,i)->sequence) mbx_elt (stream,i);
}
/* MBX mail fetch structure
* Accepts: MAIL stream
* message # to fetch
* pointer to return body
* option flags
* Returns: envelope of this message, body returned in body value
*
* Fetches the "fast" information as well
*/
ENVELOPE *mbx_fetchstructure (MAILSTREAM *stream,unsigned long msgno,
BODY **body,long flags)
{
LONGCACHE *lelt;
ENVELOPE **env;
BODY **b;
STRING bs;
unsigned long i,hdrsize,textsize;
if (flags & FT_UID) { /* UID form of call */
for (i = 1; i <= stream->nmsgs; i++)
if (mail_uid (stream,i) == msgno)
return mbx_fetchstructure (stream,i,body,flags & ~FT_UID);
return NIL; /* didn't find the UID */
}
if (stream->scache) { /* short cache */
if (msgno != stream->msgno){/* flush old poop if a different message */
mail_free_envelope (&stream->env);
mail_free_body (&stream->body);
}
stream->msgno = msgno;
env = &stream->env; /* get pointers to envelope and body */
b = &stream->body;
}
else { /* long cache */
lelt = mail_lelt (stream,msgno);
env = &lelt->env; /* get pointers to envelope and body */
b = &lelt->body;
}
if ((body && !*b) || !*env) { /* have the poop we need? */
mail_free_envelope (env); /* flush old envelope and body */
mail_free_body (b);
/* read the header */
mbx_fetchheader_work (stream,msgno,&hdrsize);
if (body) { /* don't bother with text if don't want body */
mbx_fetchtext_work (stream,msgno,&textsize);
INIT (&bs,mail_string,(void *) LOCAL->txt,textsize);
}
else textsize = 0; /* no text then */
/* make sure enough space */
if ((i = max (hdrsize,textsize)) > LOCAL->buflen) {
fs_give ((void **) &LOCAL->buf);
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = i) + 1);
}
/* parse envelope and body */
rfc822_parse_msg (env,body ? b : NIL,LOCAL->hdr,hdrsize,body ? &bs : NIL,
mylocalhost (),LOCAL->buf);
}
if (body) *body = *b; /* return the body */
return *env; /* return the envelope */
}
/* MBX 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 *mbx_fetchheader (MAILSTREAM *stream,unsigned long msgno,
STRINGLIST *lines,unsigned long *len,long flags)
{
char *hdr;
unsigned long i;
if (flags & FT_UID) { /* UID form of call */
for (i = 1; i <= stream->nmsgs; i++)
if (mail_uid (stream,i) == msgno)
return mbx_fetchheader (stream,i,lines,len,flags & ~FT_UID);
return NIL; /* didn't find the UID */
}
/* get the header */
hdr = mbx_fetchheader_work (stream,msgno,&i);
/* filter if necessary */
if (lines) i = mail_filter (hdr,i,lines,flags);
if (len) *len = i;
return hdr;
}
/* MBX mail fetch message header work
* Accepts: MAIL stream
* message # to fetch
* pointer to size to return
* Returns: message header in RFC822 format
*/
char *mbx_fetchheader_work (MAILSTREAM *stream,unsigned long msgno,
unsigned long *len)
{
unsigned long pos = mbx_header (stream,msgno,len);
if (LOCAL->hdrmsgno != msgno){/* is cache correct? */
if (LOCAL->hdr) fs_give ((void **) &LOCAL->hdr);
LOCAL->hdr = (char *) fs_get (1 + *len);
LOCAL->hdr[*len] = '\0'; /* tie off string */
LOCAL->hdrmsgno = msgno; /* note cache */
lseek (LOCAL->fd,pos,L_SET);/* get to header position */
/* slurp the data */
read (LOCAL->fd,LOCAL->hdr,*len);
}
return LOCAL->hdr;
}
/* MBX mail fetch message text (body only)
* Accepts: MAIL stream
* message # to fetch
* pointer to returned header text length
* option flags
* Returns: message text in RFC822 format
*/
char *mbx_fetchtext (MAILSTREAM *stream,unsigned long msgno,
unsigned long *len,long flags)
{
char *txt;
unsigned long i;
MESSAGECACHE *elt;
if (flags & FT_UID) { /* UID form of call */
for (i = 1; i <= stream->nmsgs; i++)
if (mail_uid (stream,i) == msgno)
return mbx_fetchtext (stream,i,len,flags & ~FT_UID);
return NIL; /* didn't find the UID */
}
elt = mbx_elt (stream,msgno); /* get message status */
txt = mbx_fetchtext_work (stream,msgno,&i);
/* if message not seen */
if (!(flags & FT_PEEK) && !elt->seen) {
elt->seen = T; /* mark message as seen */
/* recalculate status */
mbx_update_status (stream,msgno,T);
}
if (len) *len = i; /* return size */
return txt;
}
/* MBX mail fetch message header work
* Accepts: MAIL stream
* message # to fetch
* pointer to size to return
* Returns: message header in RFC822 format
*/
char *mbx_fetchtext_work (MAILSTREAM *stream,unsigned long msgno,
unsigned long *len)
{
unsigned long hdrsize;
unsigned long pos = mbx_header (stream,msgno,&hdrsize);
*len = mail_elt (stream,msgno)->rfc822_size - hdrsize;
if (LOCAL->txtmsgno != msgno){/* is cache correct? */
if (LOCAL->txt) fs_give ((void **) &LOCAL->txt);
LOCAL->txt = (char *) fs_get (1 + *len);
LOCAL->txt[*len] = '\0'; /* tie off string */
LOCAL->txtmsgno = msgno; /* note cache */
/* get to text position */
lseek (LOCAL->fd,pos + hdrsize,L_SET);
/* slurp the data */
read (LOCAL->fd,LOCAL->txt,*len);
}
return LOCAL->txt;
}
/* MBX fetch message body as a structure
* Accepts: Mail stream
* message # to fetch
* section specifier
* pointer to length
* option flags
* Returns: pointer to section of message body
*/
char *mbx_fetchbody (MAILSTREAM *stream,unsigned long msgno,char *s,
unsigned long *len,long flags)
{
BODY *b;
PART *pt;
char *t;
unsigned long offset = 0;
unsigned long i,base,hdrpos,size = 0;
unsigned short enc = ENC7BIT;
MESSAGECACHE *elt;
if (flags & FT_UID) { /* UID form of call */
for (i = 1; i <= stream->nmsgs; i++)
if (mail_uid (stream,i) == msgno)
return mbx_fetchbody (stream,i,s,len,flags & ~FT_UID);
return NIL; /* didn't find the UID */
}
hdrpos = mbx_header (stream,msgno,&base);
elt = mail_elt (stream,msgno);/* get elt */
/* make sure have a body */
if (!(mbx_fetchstructure (stream,msgno,&b,flags & ~FT_UID) && b && s &&
*s && isdigit (*s))) return NIL;
if (!(i = strtoul (s,&s,10))) /* section 0 */
return *s ? NIL : mbx_fetchheader (stream,msgno,NIL,len,flags);
do { /* until find desired body part */
/* multipart content? */
if (b->type == TYPEMULTIPART) {
pt = b->contents.part; /* yes, find desired part */
while (--i && (pt = pt->next));
if (!pt) return NIL; /* bad specifier */
/* note new body, check valid nesting */
if (((b = &pt->body)->type == TYPEMULTIPART) && !*s) return NIL;
offset = pt->offset; /* get new offset */
}
else if (i != 1) return NIL;/* otherwise must be section 1 */
/* need to go down further? */
if (i = *s) switch (b->type) {
case TYPEMESSAGE: /* embedded message */
if (!((*s++ == '.') && isdigit (*s))) return NIL;
/* get message's body if non-zero */
if (i = strtoul (s,&s,10)) {
offset = b->contents.msg.offset;
b = b->contents.msg.body;
}
else { /* want header */
size = b->contents.msg.offset - offset;
b = NIL; /* make sure the code below knows */
}
break;
case TYPEMULTIPART: /* multipart, get next section */
if ((*s++ == '.') && isdigit (*s) && (i = strtoul (s,&s,10)) > 0) break;
default: /* bogus subpart specification */
return NIL;
}
} while (i);
if (b) { /* looking at a non-multipart body? */
if (b->type == TYPEMULTIPART) return NIL;
size = b->size.ibytes; /* yes, get its size */
enc = b->encoding;
}
else if (!size) return NIL; /* lose if not getting a header */
/* if message not seen */
if (!(flags & FT_PEEK) && !elt->seen) {
elt->seen = T; /* mark message as seen */
/* recalculate status */
mbx_update_status (stream,msgno,T);
}
/* move to that place in the data */
lseek (LOCAL->fd,hdrpos + base + offset,L_SET);
/* slurp the data */
t = (char *) fs_get (1 + size);
read (LOCAL->fd,t,size);
rfc822_contents(&LOCAL->buf,&LOCAL->buflen,len,t,size,enc);
fs_give ((void **) &t); /* flush readin buffer */
return LOCAL->buf;
}
/* MBX locate header for a message
* Accepts: MAIL stream
* message number
* pointer to returned header size
* Returns: position of header in file
*/
unsigned long mbx_header (MAILSTREAM *stream,unsigned long msgno,
unsigned long *size)
{
long siz;
long i = 0;
int q = 0;
char *s,tmp[MAILTMPLEN];
MESSAGECACHE *elt = mbx_elt (stream,msgno);
long pos = elt->data1 + elt->data2;
if (!(*size = elt->data3)) { /* is header size known? */
lseek (LOCAL->fd,pos,L_SET);/* get to header position */
/* search message for CRLF CRLF */
for (siz = 1; siz <= elt->rfc822_size; siz++) {
/* read another buffer as necessary */
if (--i <= 0) /* buffer empty? */
if (read (LOCAL->fd,s = tmp,
i = min (elt->rfc822_size - siz,(long) MAILTMPLEN)) < 0)
return pos; /* I/O error? */
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->data3 = *size = siz;
return pos; /* return to caller */
}
q = 0; /* lost... */
break;
}
}
}
return pos; /* have position */
}
/* MBX mail set flag
* Accepts: MAIL stream
* sequence
* flag(s)
* option flags
*/
void mbx_setflag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
{
MESSAGECACHE *elt;
struct stat sbuf;
long i,f;
unsigned long uf;
/* find last assigned user flag */
for (i = 0; i < NUSERFLAGS && stream->user_flags[i]; ++i);
/* parse flags */
f = mail_parse_flags (stream,flag,&uf);
/* note if any new keywords appeared */
if (i < NUSERFLAGS && stream->user_flags[i]) LOCAL->newkeyword = T;
if (!(f || uf)) return; /* no-op if no flags to modify */
if (LOCAL->filetime && !LOCAL->shouldcheck) {
fstat (LOCAL->fd,&sbuf); /* get current write time */
if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
}
/* get sequence and loop on it */
if ((flags & ST_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
mbx_elt (stream,i); /* set all requested flags */
if (f&fSEEN) elt->seen = T;
if (f&fDELETED) elt->deleted = T;
if (f&fFLAGGED) elt->flagged = T;
if (f&fANSWERED) elt->answered = T;
if (f&fDRAFT) elt->draft = T;
elt->user_flags |= uf;
/* recalculate status */
mbx_update_status (stream,i,NIL);
}
if (!stream->rdonly) { /* make sure the update takes */
fsync (LOCAL->fd);
fstat (LOCAL->fd,&sbuf); /* get current write time */
LOCAL->filetime = sbuf.st_mtime;
}
}
/* MBX mail clear flag
* Accepts: MAIL stream
* sequence
* flag(s)
* option flags
*/
void mbx_clearflag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
{
MESSAGECACHE *elt;
struct stat sbuf;
long i,f;
unsigned long uf;
/* find last assigned user flag */
for (i = 0; i < NUSERFLAGS && stream->user_flags[i]; ++i);
/* parse flags */
f = mail_parse_flags (stream,flag,&uf);
/* note if any new keywords appeared */
if (i < NUSERFLAGS && stream->user_flags[i]) LOCAL->newkeyword = T;
if (!(f || uf)) return; /* no-op if no flags to modify */
if (LOCAL->filetime && !LOCAL->shouldcheck) {
fstat (LOCAL->fd,&sbuf); /* get current write time */
if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
}
/* get sequence and loop on it */
if ((flags & ST_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
mbx_elt (stream,i); /* clear all requested flags */
if (f&fSEEN) elt->seen = NIL;
if (f&fDELETED) elt->deleted = NIL;
if (f&fFLAGGED) elt->flagged = NIL;
if (f&fANSWERED) elt->answered = NIL;
if (f&fDRAFT) elt->draft = NIL;
elt->user_flags &= ~uf;
/* recalculate status */
mbx_update_status (stream,i,NIL);
}
if (!stream->rdonly) { /* make sure the update takes */
fsync (LOCAL->fd);
fstat (LOCAL->fd,&sbuf); /* get current write time */
LOCAL->filetime = sbuf.st_mtime;
}
}
/* MBX mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream still alive, NIL if not
*/
long mbx_ping (MAILSTREAM *stream)
{
long i = 1;
long r = NIL;
int ld;
char lock[MAILTMPLEN];
struct stat sbuf;
if (stream && LOCAL) { /* only if stream already open */
if (LOCAL->filetime && !(LOCAL->mustcheck || LOCAL->shouldcheck)) {
fstat (LOCAL->fd,&sbuf); /* get current write time */
if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
}
/* check for changed message status */
if (LOCAL->mustcheck || LOCAL->shouldcheck) {
if (LOCAL->shouldcheck) /* babble when we do this unilaterally */
mm_notify (stream,"[CHECK] Checking for flag updates",NIL);
while (i <= stream->nmsgs) mbx_elt (stream,i++);
LOCAL->mustcheck = LOCAL->shouldcheck = NIL;
}
/* get parse/append permission */
if ((ld = mbx_lock (LOCAL->fd,lock)) >= 0) {
/* parse resulting mailbox */
r = (mbx_parse (stream)) ? T : NIL;
mbx_unlock (ld,lock); /* release shared parse/append permission */
}
/* snarf if this is a read-write inbox */
if (stream && LOCAL && LOCAL->inbox && !stream->rdonly) {
mbx_snarf (stream);
/* get parse/append permission */
if ((ld = mbx_lock (LOCAL->fd,lock)) >= 0) {
/* parse resulting mailbox */
r = (mbx_parse (stream)) ? T : NIL;
mbx_unlock (ld,lock); /* release shared parse/append permission */
}
}
}
return r; /* return result of the parse */
}
/* MBX mail check mailbox (reparses status too)
* Accepts: MAIL stream
*/
void mbx_check (MAILSTREAM *stream)
{
/* mark that a check is desired */
if (LOCAL) LOCAL->mustcheck = T;
if (mbx_ping (stream)) mm_log ("Check completed",(long) NIL);
}
/* MBX mail snarf messages from system inbox
* Accepts: MAIL stream
*/
void mbx_snarf (MAILSTREAM *stream)
{
unsigned long i = 0;
unsigned long r,j;
struct stat sbuf;
struct iovec iov[3];
char lock[MAILTMPLEN];
MESSAGECACHE *elt;
MAILSTREAM *sysibx = NIL;
int ld;
/* give up if can't get exclusive permission */
if ((!strcmp (sysinbox (),stream->mailbox)) ||
((ld = mbx_lock (LOCAL->fd,lock)) < 0)) return;
mm_critical (stream); /* go critical */
stat (sysinbox (),&sbuf); /* see if anything there */
if (sbuf.st_size) { /* non-empty? */
fstat (LOCAL->fd,&sbuf); /* yes, get current file size */
/* sizes match and can get sysibx mailbox? */
if ((sbuf.st_size == LOCAL->filesize) &&
(sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) &&
(!sysibx->rdonly) && (r = sysibx->nmsgs)) {
/* yes, go to end of file in our mailbox */
lseek (LOCAL->fd,sbuf.st_size,L_SET);
/* for each message in sysibx mailbox */
while (r && (++i <= sysibx->nmsgs)) {
/* snarf message from system INBOX */
iov[1].iov_base = cpystr (mail_fetchheader_full (sysibx,i,NIL,&j,NIL));
iov[1].iov_len = j;
iov[2].iov_base = mail_fetchtext_full (sysibx,i,&j,NIL);
iov[2].iov_len = j;
/* calculate header line */
mail_date ((iov[0].iov_base = LOCAL->buf),elt = mail_elt (sysibx,i));
sprintf (LOCAL->buf + strlen (LOCAL->buf),
",%ld;00000000%04x-00000000\015\012",
iov[1].iov_len + iov[2].iov_len,(fSEEN * elt->seen) +
(fDELETED * elt->deleted) + (fFLAGGED * elt->flagged) +
(fANSWERED * elt->answered) + (fDRAFT * elt->draft));
iov[0].iov_len = strlen (iov[0].iov_base);
/* copy message to new mailbox */
if ((writev (LOCAL->fd,iov,3) < 0) || fsync (LOCAL->fd)) {
sprintf (LOCAL->buf,"Can't copy new mail: %s",strerror (errno));
mm_log (LOCAL->buf,ERROR);
ftruncate (LOCAL->fd,sbuf.st_size);
r = 0; /* flag that we have lost big */
}
fs_give ((void **) &iov[1].iov_base);
}
fstat (LOCAL->fd,&sbuf); /* yes, get current file size */
LOCAL->filetime = sbuf.st_mtime;
if (r) { /* delete all the messages we copied */
for (i = 1; i <= r; i++) mail_elt (sysibx,i)->deleted = T;
mail_expunge (sysibx); /* now expunge all those messages */
}
}
if (sysibx) mail_close (sysibx);
}
mm_nocritical (stream); /* release critical */
mbx_unlock (ld,lock); /* release exclusive parse/append permission */
}
/* MBX mail expunge mailbox
* Accepts: MAIL stream
*/
void mbx_expunge (MAILSTREAM *stream)
{
struct stat sbuf;
off_t pos = HDRSIZE;
int ld;
unsigned long i = 1;
unsigned long j,k,m,recent;
unsigned long n = 0;
unsigned long delta = 0;
char lock[MAILTMPLEN];
MESSAGECACHE *elt;
/* do nothing if stream dead */
if (!mbx_ping (stream)) return;
if (stream->rdonly) { /* won't do on readonly files! */
mm_log ("Expunge ignored on readonly mailbox",WARN);
return;
}
if (LOCAL->filetime && !LOCAL->shouldcheck) {
fstat (LOCAL->fd,&sbuf); /* get current write time */
if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
}
/* The cretins who designed flock() created a window of vulnerability in
* upgrading locks from shared to exclusive or downgrading from exclusive
* to shared. Rather than maintain the lock at shared status at a minimum,
* flock() actually *releases* the former lock. Obviously they never talked
* to any database guys. Fortunately, we have the parse/append permission
* lock. If we require this lock before going exclusive on the mailbox,
* another process can not sneak in and steal the exclusive mailbox lock on
* us, because it will block on trying to get parse/append permission first.
*/
/* get parse/append permission */
if ((ld = mbx_lock (LOCAL->fd,lock)) < 0) {
mm_log ("Unable to lock expunge mailbox",ERROR);
return;
}
/* get exclusive access */
if (flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
flock (LOCAL->fd,LOCK_SH); /* recover previous lock */
mm_log("Can't expunge because mailbox is in use by another process",ERROR);
mbx_unlock (ld,lock); /* release exclusive parse/append permission */
return;
}
mbx_gc (stream,GC_TEXTS); /* flush texts */
mm_critical (stream); /* go critical */
recent = stream->recent; /* get recent now that pinged and locked */
while (i <= stream->nmsgs) { /* for each message */
elt = mbx_elt (stream,i); /* get cache element */
/* number of bytes to smash or preserve */
k = elt->data2 + elt->rfc822_size;
if (elt->deleted) { /* if deleted */
if (elt->recent) --recent;/* if recent, note one less recent message */
delta += k; /* number of bytes to delete */
mail_expunged (stream,i); /* notify upper levels */
n++; /* count up one more expunged message */
}
else if (i++ && delta) { /* preserved message */
j = elt->data1; /* first byte to preserve */
do { /* read from source position */
m = min (k,LOCAL->buflen);
lseek (LOCAL->fd,j,L_SET);
read (LOCAL->fd,LOCAL->buf,(unsigned int) m);
pos = j - delta; /* write to destination position */
lseek (LOCAL->fd,pos,L_SET);
write (LOCAL->fd,LOCAL->buf,(unsigned int) m);
pos += m; /* new position */
j += m; /* next chunk, perhaps */
} while (k -= m); /* until done */
elt->data1 -= delta; /* note the new address of this text */
}
else pos = elt->data1 + k; /* preserved but no deleted messages */
}
if (n) { /* truncate file after last message */
if (pos != (LOCAL->filesize -= delta)) {
sprintf (LOCAL->buf,"Calculated size mismatch %ld != %ld, delta = %ld",
pos,LOCAL->filesize,delta);
mm_log (LOCAL->buf,WARN);
LOCAL->filesize = pos; /* fix it then */
}
ftruncate (LOCAL->fd,LOCAL->filesize);
sprintf (LOCAL->buf,"Expunged %ld messages",n);
/* output the news */
mm_log (LOCAL->buf,(long) NIL);
}
else mm_log ("No messages deleted, so no update needed",(long) NIL);
fsync (LOCAL->fd); /* force disk update */
fstat (LOCAL->fd,&sbuf); /* get new write time */
LOCAL->filetime = sbuf.st_mtime;
mm_nocritical (stream); /* release critical */
/* notify upper level of new mailbox size */
mail_exists (stream,stream->nmsgs);
mail_recent (stream,recent);
flock (LOCAL->fd,LOCK_SH); /* allow sharers again */
mbx_unlock (ld,lock); /* release exclusive parse/append permission */
}
/* MBX mail copy message(s)
* Accepts: MAIL stream
* sequence
* destination mailbox
* copy options
* Returns: T if success, NIL if failed
*/
long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
long i;
struct stat sbuf;
MESSAGECACHE *elt;
if (!(((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence)) &&
mbx_copy_messages (stream,mailbox))) return NIL;
/* delete all requested messages */
if (options & CP_MOVE) for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mbx_elt (stream,i))->sequence) {
elt->deleted = T; /* mark message deleted */
/* recalculate status */
mbx_update_status (stream,i,NIL);
}
if (!stream->rdonly) { /* make sure the update takes */
fsync (LOCAL->fd);
fstat (LOCAL->fd,&sbuf); /* get current write time */
LOCAL->filetime = sbuf.st_mtime;
}
return LONGT;
}
/* MBX mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* stringstruct of messages to append
* Returns: T if append successful, else NIL
*/
long mbx_append (MAILSTREAM *stream,char *mailbox,char *flags,char *date,
STRING *message)
{
struct stat sbuf;
int fd,ld;
char *s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
time_t tp[2];
MESSAGECACHE elt;
long i = 0;
long size = SIZE (message);
long ret = LONGT;
unsigned long uf = 0;
long f = mail_parse_flags (stream ? stream : user_flags (&mbxproto),
flags,&uf);
/* reverse bits (dontcha wish we had CIRC?) */
if (date) { /* want to preserve date? */
/* yes, parse date into an elt */
if (!mail_parse_date (&elt,date)) {
sprintf (tmp,"Bad date in append: %s",date);
mm_log (tmp,ERROR);
return NIL;
}
}
/* N.B.: can't use LOCAL->buf for tmp */
/* make sure valid mailbox */
if (!mbx_isvalid (mailbox,tmp,NIL)) switch (errno) {
case ENOENT: /* no such file? */
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
return NIL;
case 0: /* merely empty file? */
break;
case EINVAL:
sprintf (tmp,"Invalid MBX-format mailbox name: %s",mailbox);
mm_log (tmp,ERROR);
return NIL;
default:
sprintf (tmp,"Not a MBX-format mailbox: %s",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
if ((fd = open (mbx_file (file,mailbox),O_RDWR|O_CREAT,
S_IREAD|S_IWRITE)) < 0) {
sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
/* get parse/append permission */
if ((ld = mbx_lock (fd,lock)) < 0) {
mm_log ("Unable to lock append mailbox",ERROR);
return NIL;
}
s = (char *) fs_get (size); /* copy message */
for (i = 0; i < size; s[i++] = SNX (message));
mm_critical (stream); /* go critical */
fstat (fd,&sbuf); /* get current file size */
lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
if (date) mail_date(tmp,&elt);/* write preseved date */
else internal_date (tmp); /* get current date in IMAP format */
/* add remainder of header */
sprintf (tmp+26,",%ld;%08lx%04x-00000000\015\012",size,uf,f);
/* write header */
if ((write (fd,tmp,strlen (tmp)) < 0) || ((write (fd,s,size)) < 0) ||
fsync (fd)) {
sprintf (tmp,"Message append failed: %s",strerror (errno));
mm_log (tmp,ERROR);
ftruncate (fd,sbuf.st_size);
ret = NIL;
}
tp[0] = sbuf.st_atime; /* preserve atime and mtime */
tp[1] = sbuf.st_mtime;
utime (file,tp); /* set the times */
mbx_unlock (ld,lock); /* release exclusive parse/append permission */
close (fd); /* close the file */
mm_nocritical (stream); /* release critical */
fs_give ((void **) &s); /* flush the buffer */
return ret;
}
/* MBX garbage collect stream
* Accepts: Mail stream
* garbage collection flags
*/
void mbx_gc (MAILSTREAM *stream,long gcflags)
{
if (gcflags & GC_TEXTS) { /* flush texts */
LOCAL->hdrmsgno = LOCAL->txtmsgno = 0;
if (LOCAL->hdr) fs_give ((void **) &LOCAL->hdr);
if (LOCAL->txt) fs_give ((void **) &LOCAL->txt);
}
}
/* Internal routines */
/* MBX mail lock file for parse/append permission
* Accepts: file descriptor
* lock file name buffer
* Returns: file descriptor of lock or -1 if failure
*/
int mbx_lock (int fd,char *lock)
{
int ld;
struct stat sbuf;
/* get data for this file */
if (fstat (fd,&sbuf)) return -1;
/* make temporary file name */
sprintf (lock,"/tmp/.%hx.%lx",sbuf.st_dev,sbuf.st_ino);
if ((ld = open (lock,O_RDWR|O_CREAT,
(int) mail_parameters (NIL,GET_LOCKPROTECTION,NIL))) < 0)
return -1;
flock (ld,LOCK_EX); /* get this lock */
return ld; /* return locking file descriptor */
}
/* MBX mail unlock file for parse/append permission
* Accepts: file descriptor
* lock file name from mbx_lock()
*/
void mbx_unlock (int fd,char *lock)
{
unlink (lock); /* delete the file */
flock (fd,LOCK_UN); /* unlock it */
close (fd); /* close it */
}
/* MBX mail generate file string
* Accepts: temporary buffer to write into
* mailbox name string
* Returns: local file string or NIL if failure
*/
char *mbx_file (char *dst,char *name)
{
char *s,tmp[MAILTMPLEN];
/* permit #mbx namespace */
if ((*name == '#') && ((name[1] == 'm') || (name[1] == 'M')) &&
((name[2] == 'b') || (name[2] == 'B')) &&
((name[3] == 'x') || (name[3] == 'X')) && (name[4] == '/')) name += 5;
s = mailboxfile (dst,name);
/* return our standard inbox */
return (s && !*s) ? mailboxfile (dst,"~/INBOX") : s;
}
/* MBX mail parse mailbox
* Accepts: MAIL stream
* Returns: T if parse OK
* NIL if failure, stream aborted
*/
long mbx_parse (MAILSTREAM *stream)
{
struct stat sbuf;
MESSAGECACHE *elt = NIL;
char c,*s,*t,*x;
char tmp[MAILTMPLEN];
unsigned long i,j;
long curpos = LOCAL->filesize;
unsigned long nmsgs = stream->nmsgs;
unsigned long recent = stream->recent;
unsigned long lastuid = 0;
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);
mbx_close (stream,NIL);
return NIL;
}
lseek (LOCAL->fd,0,L_SET); /* rewind file */
/* read internal header */
read (LOCAL->fd,LOCAL->buf,HDRSIZE);
LOCAL->buf[HDRSIZE] = '\0'; /* tie off header */
c = LOCAL->buf[15]; /* save first character of last UID */
LOCAL->buf[15] = '\0';
/* parse UID validity */
stream->uid_validity = strtoul (LOCAL->buf + 7,NIL,16);
LOCAL->buf[15] = c; /* restore first character of last UID */
/* parse last UID */
stream->uid_last = strtoul (LOCAL->buf + 15,NIL,16);
/* parse user flags */
for (i = 0, s = LOCAL->buf + 25; i < NUSERFLAGS && (t = strchr (s,'\015'));
i++, s = t + 2) {
*t = '\0'; /* tie off flag */
if (*s && !stream->user_flags[i]) stream->user_flags[i] = cpystr (s);
}
while (sbuf.st_size - curpos){/* while there is stuff to parse */
/* get to that position in the file */
lseek (LOCAL->fd,curpos,L_SET);
if ((i = read (LOCAL->fd,LOCAL->buf,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);
mbx_close (stream,NIL);
return NIL;
}
LOCAL->buf[i] = '\0'; /* tie off buffer just in case */
if (!((s = strchr (LOCAL->buf,'\015')) && (s[1] == '\012'))) {
sprintf (tmp,"Unable to find CRLF at %ld in %ld bytes, text: %s",
curpos,i,LOCAL->buf);
mm_log (tmp,ERROR);
mbx_close (stream,NIL);
return NIL;
}
*s = '\0'; /* tie off header line */
i = (s + 2) - LOCAL->buf; /* note start of text offset */
if (!((s = strchr (LOCAL->buf,',')) && (t = strchr (s+1,';')))) {
sprintf (tmp,"Unable to parse internal header at %ld: %s",curpos,
LOCAL->buf);
mm_log (tmp,ERROR);
mbx_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->data1 = curpos; /* note file offset of header */
elt->data2 = 0; /* in case error */
elt->data3 = 0; /* header size not known yet */
/* parse the header components */
if (mail_parse_date (elt,LOCAL->buf) &&
(elt->rfc822_size = strtoul (x = s,&s,10)) && (!(s && *s)))
if (isxdigit (t[0]) && isxdigit (t[1]) && isxdigit (t[2]) &&
isxdigit (t[3]) && isxdigit (t[4]) && isxdigit (t[5]) &&
isxdigit (t[6]) && isxdigit (t[7]) && isxdigit (t[8]) &&
isxdigit (t[9]) && isxdigit (t[10]) && isxdigit (t[11]))
if ((t[12] == '-') && isxdigit (t[13]) && isxdigit (t[14]) &&
isxdigit (t[15]) && isxdigit (t[16]) && isxdigit (t[17]) &&
isxdigit (t[18]) && isxdigit (t[19]) && isxdigit (t[20]))
elt->data2 = i; /* note offset from header of message */
if (!elt->data2) {
sprintf (tmp,"Unable to parse internal header elements at %ld: %s,%s;%s",
curpos,LOCAL->buf,x,t);
mm_log (tmp,ERROR);
mbx_close (stream,NIL);
return NIL;
}
/* make sure didn't run off end of file */
if ((curpos += (elt->rfc822_size + i)) > sbuf.st_size) {
mm_log ("Last message runs past end of file",ERROR);
mbx_close (stream,NIL);
return NIL;
}
c = t[8]; /* remember first system flags byte */
t[8] = t[12] = t[21] = '\0';/* tie off flags */
/* get user flags value */
elt->user_flags = strtoul (t,NIL,16);
t[8] = c; /* restore first system flags byte */
/* calculate system flags */
if ((j = strtoul (t+8,NIL,16)) & fSEEN) elt->seen = T;
if (j & fDELETED) elt->deleted = T;
if (j & fFLAGGED) elt->flagged = T;
if (j & fANSWERED) elt->answered = T;
if (j & fDRAFT) elt->draft = T;
/* have a valid UID for this message yet? */
if ((elt->uid = strtoul (t+13,NIL,16)) &&
((elt->uid <= lastuid) || (elt->uid > stream->uid_last))) {
sprintf (tmp,"Invalid UID %08x in message %ld, rebuilding UIDs",
elt->uid,elt->msgno);
mm_log (tmp,WARN);
elt->uid = 0; /* lose this UID */
/* restart UID validity and last UID */
stream->uid_validity = time (0);
stream->uid_last = lastuid;
}
if (!elt->uid) { /* UID assigned yet? */
elt->recent = T; /* no, mark as recent */
recent++; /* count up a new recent message */
/* assign new UID */
elt->uid = ++stream->uid_last;
mbx_update_status (stream,elt->msgno,NIL);
}
lastuid = elt->uid; /* update last parsed UID */
}
mbx_update_header (stream); /* update header */
fsync (LOCAL->fd); /* make sure all the UID updates take */
/* update parsed file size and time */
LOCAL->filesize = sbuf.st_size;
fstat (LOCAL->fd,&sbuf); /* get status again to ensure time is right */
LOCAL->filetime = sbuf.st_mtime;
mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
mail_recent (stream,recent); /* and of change in recent messages */
return LONGT; /* return the winnage */
}
/* MBX copy messages
* Accepts: MAIL stream
* mailbox copy vector
* mailbox name
* Returns: T if success, NIL if failed
*/
long mbx_copy_messages (MAILSTREAM *stream,char *mailbox)
{
struct stat sbuf;
time_t tp[2];
MESSAGECACHE *elt;
unsigned long i,j,k;
long ret = LONGT;
int fd,ld;
char file[MAILTMPLEN],lock[MAILTMPLEN];
/* make sure valid mailbox */
if (!mbx_isvalid (mailbox,LOCAL->buf,NIL)) switch (errno) {
case ENOENT: /* no such file? */
mm_notify (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
return NIL;
case 0: /* merely empty file? */
break;
case EINVAL:
sprintf (LOCAL->buf,"Invalid MBX-format mailbox name: %s",mailbox);
mm_log (LOCAL->buf,ERROR);
return NIL;
default:
sprintf (LOCAL->buf,"Not a MBX-format mailbox: %s",mailbox);
mm_log (LOCAL->buf,ERROR);
return NIL;
}
/* got file? */
if ((fd=open(mbx_file(file,mailbox),O_RDWR|O_CREAT,S_IREAD|S_IWRITE))<0) {
sprintf (LOCAL->buf,"Unable to open copy mailbox: %s",strerror (errno));
mm_log (LOCAL->buf,ERROR);
return NIL;
}
mm_critical (stream); /* go critical */
/* get parse/append permission */
if ((ld = mbx_lock (fd,lock)) < 0) {
mm_log ("Unable to lock copy mailbox",ERROR);
return NIL;
}
fstat (fd,&sbuf); /* get current file size */
lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
/* for each requested message */
for (i = 1; ret && (i <= stream->nmsgs); i++)
if ((elt = mail_elt (stream,i))->sequence) {
lseek (LOCAL->fd,elt->data1,L_SET);
/* number of bytes to copy */
k = elt->data2 + elt->rfc822_size;
do { /* read from source position */
j = min (k,LOCAL->buflen);
read (LOCAL->fd,LOCAL->buf,(unsigned int) j);
if ((write (fd,LOCAL->buf,(unsigned int) j) < 0) || fsync (fd)) {
sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno));
mm_log (LOCAL->buf,ERROR);
ftruncate (fd,sbuf.st_size);
j = k;
ret = NIL; /* note error */
break;
}
} while (k -= j); /* until done */
}
tp[0] = sbuf.st_atime; /* preserve atime and mtime */
tp[1] = sbuf.st_mtime;
utime (file,tp); /* set the times */
mbx_unlock (ld,lock); /* release exclusive parse/append permission */
close (fd); /* close the file */
mm_nocritical (stream); /* release critical */
return ret;
}
/* MBX get cache element with status updating from file
* Accepts: MAIL stream
* message number
* Returns: cache element
*/
MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno)
{
unsigned long sysflags;
char c;
MESSAGECACHE *elt = mail_elt (stream,msgno);
unsigned long oldsysflags = (elt->seen ? fSEEN : NIL) |
(elt->deleted ? fDELETED : NIL) | (elt->flagged ? fFLAGGED : NIL) |
(elt->answered ? fANSWERED : NIL) | (elt->draft ? fDRAFT : NIL);
unsigned long olduserflags = elt->user_flags;
/* set the seek pointer */
lseek (LOCAL->fd,(off_t) elt->data1 + elt->data2 - 23,L_SET);
/* read the new flags */
if (read (LOCAL->fd,LOCAL->buf,12) < 0) {
sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
fatal (LOCAL->buf);
}
LOCAL->buf[12] = '\0'; /* tie off buffer */
/* calculate system flags */
sysflags = strtoul (LOCAL->buf+8,NIL,16);
elt->seen = sysflags & fSEEN ? T : NIL;
elt->deleted = sysflags & fDELETED ? T : NIL;
elt->flagged = sysflags & fFLAGGED ? T : NIL;
elt->answered = sysflags & fANSWERED ? T : NIL;
elt->draft = sysflags & fDRAFT ? T : NIL;
c = LOCAL->buf[8]; /* remember first system flags byte */
LOCAL->buf[8] = '\0'; /* tie off flags */
/* get user flags value */
elt->user_flags = strtoul (LOCAL->buf,NIL,16);
LOCAL->buf[8] = c; /* restore first system flags byte */
if ((oldsysflags != sysflags) || (olduserflags != elt->user_flags))
mm_flags (stream,msgno); /* let top level know */
return elt;
}
/* MBX update header
* Accepts: MAIL stream
*/
void mbx_update_header (MAILSTREAM *stream)
{
int i;
char *s = LOCAL->buf;
memset (s,'\0',HDRSIZE); /* initialize header */
sprintf (s,"*mbx*\015\012%08lx%08lx\015\012",
stream->uid_validity,stream->uid_last);
for (i = 0; i < NUSERFLAGS; ++i)
sprintf (s += strlen (s),"%s\015\012",
stream->user_flags[i] ? stream->user_flags[i] : "");
lseek (LOCAL->fd,0,L_SET); /* rewind file */
/* write new header */
write (LOCAL->fd,LOCAL->buf,HDRSIZE);
}
/* MBX update status string
* Accepts: MAIL stream
* message number
* flag saying whether or not to sync
*/
void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long syncflag)
{
MESSAGECACHE *elt = mail_elt (stream,msgno);
struct stat sbuf;
if (!stream->rdonly) { /* not if readonly you don't */
if (LOCAL->newkeyword) { /* defined a new keyword? */
mbx_update_header (stream);
LOCAL->newkeyword = NIL; /* don't do this again */
}
/* print new flag string */
sprintf (LOCAL->buf,"%08lx%04x-%08lx",elt->user_flags,
(fSEEN * elt->seen) + (fDELETED * elt->deleted) +
(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
(fDRAFT * elt->draft),elt->uid);
/* get to that place in the file */
lseek (LOCAL->fd,(off_t) elt->data1 + elt->data2 - 23,L_SET);
/* write new flags and UID */
write (LOCAL->fd,LOCAL->buf,21);
/* sync if requested */
if (syncflag) fsync (LOCAL->fd);
fstat (LOCAL->fd,&sbuf); /* get new write time */
LOCAL->filetime = sbuf.st_mtime;
}
}
syntax highlighted by Code2HTML, v. 0.9.1