unixnt.c

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  }
}


/* UNIX mail expunge mailbox
 * Accepts: MAIL stream
 *	    sequence to expunge if non-NIL
 *	    expunge options
 * Returns: T, always
 */

long unix_expunge (MAILSTREAM *stream,char *sequence,long options)
{
  long ret;
  unsigned long i;
  char lock[MAILTMPLEN];
  char *msg = NIL;
				/* parse and lock mailbox */
  if (ret = (sequence ? ((options & EX_UID) ?
			 mail_uid_sequence (stream,sequence) :
			 mail_sequence (stream,sequence)) : LONGT) &&
      LOCAL && (LOCAL->ld >= 0) && !stream->lock &&
      unix_parse (stream,lock,LOCK_EX)) {
				/* check expunged messages if not dirty */
    for (i = 1; !LOCAL->dirty && (i <= stream->nmsgs); i++) {
      MESSAGECACHE *elt = mail_elt (stream,i);
      if (mail_elt (stream,i)->deleted) LOCAL->dirty = T;
    }
    if (!LOCAL->dirty) {	/* not dirty and no expunged messages */
      unix_unlock (LOCAL->fd,stream,lock);
      msg = "No messages deleted, so no update needed";
    }
    else if (unix_rewrite (stream,&i,lock,sequence ? LONGT : NIL)) {
      if (i) sprintf (msg = LOCAL->buf,"Expunged %lu messages",i);
      else msg = "Mailbox checkpointed, but no messages expunged";
    }
				/* rewrite failed */
    else unix_unlock (LOCAL->fd,stream,lock);
    mail_unlock (stream);	/* unlock the stream */
    mm_nocritical (stream);	/* done with critical */
    if (msg && !stream->silent) mm_log (msg,NIL);
  }
  else if (!stream->silent) mm_log("Expunge ignored on readonly mailbox",WARN);
  return ret;
}

/* UNIX mail copy message(s)
 * Accepts: MAIL stream
 *	    sequence
 *	    destination mailbox
 *	    copy options
 * Returns: T if copy successful, else NIL
 */

long unix_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
  struct stat sbuf;
  int fd;
  char *s,file[MAILTMPLEN],lock[MAILTMPLEN];
  struct utimbuf times;
  unsigned long i,j;
  MESSAGECACHE *elt;
  long ret = T;
  mailproxycopy_t pc =
    (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
  copyuid_t cu = (copyuid_t) (mail_parameters (NIL,GET_USERHASNOLIFE,NIL) ?
			      NIL : mail_parameters (NIL,GET_COPYUID,NIL));
  SEARCHSET *source = cu ? mail_newsearchset () : NIL;
  SEARCHSET *dest = cu ? mail_newsearchset () : NIL;
  MAILSTREAM *tstream = NIL;
  if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
	mail_sequence (stream,sequence))) return NIL;
				/* make sure destination is valid */
  if (!(unix_valid (mailbox) || !errno))
    switch (errno) {
    case ENOENT:			/* no such file? */
      if (compare_cstring (mailbox,"INBOX")) {
	mm_notify (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
	return NIL;
      }
      if (pc) return (*pc) (stream,sequence,mailbox,options);
      unix_create (NIL,"INBOX");/* create empty INBOX */
    case EACCES:		/* file protected */
      sprintf (LOCAL->buf,"Can't access destination: %.80s",mailbox);
      MM_LOG (LOCAL->buf,ERROR);
      return NIL;
    case EINVAL:
      if (pc) return (*pc) (stream,sequence,mailbox,options);
      sprintf (LOCAL->buf,"Invalid UNIX-format mailbox name: %.80s",mailbox);
      mm_log (LOCAL->buf,ERROR);
      return NIL;
    default:
      if (pc) return (*pc) (stream,sequence,mailbox,options);
      sprintf (LOCAL->buf,"Not a UNIX-format mailbox: %.80s",mailbox);
      mm_log (LOCAL->buf,ERROR);
      return NIL;
    }

				/* try to open rewrite for UIDPLUS */
  if ((tstream = mail_open_work (&unixdriver,NIL,mailbox,
				 OP_SILENT|OP_NOKOD)) && tstream->rdonly)
    tstream = mail_close (tstream);
  if (cu && !tstream) {		/* wanted a COPYUID? */
    sprintf (LOCAL->buf,"Unable to write-open mailbox for COPYUID: %.80s",
	     mailbox);
    MM_LOG (LOCAL->buf,WARN);
    cu = NIL;			/* don't try to do COPYUID */
  }
  LOCAL->buf[0] = '\0';
  mm_critical (stream);		/* go critical */
  if ((fd = unix_lock (dummy_file (file,mailbox),
		       O_BINARY|O_WRONLY|O_APPEND|O_CREAT,S_IREAD|S_IWRITE,
		       lock,LOCK_EX)) < 0) {
    mm_nocritical (stream);	/* done with critical */
    sprintf (LOCAL->buf,"Can't open destination mailbox: %s",strerror (errno));
    mm_log (LOCAL->buf,ERROR);	/* log the error */
    return NIL;			/* failed */
  }
  fstat (fd,&sbuf);		/* get current file size */
				/* write all requested messages to mailbox */
  for (i = 1; ret && (i <= stream->nmsgs); i++)
    if ((elt = mail_elt (stream,i))->sequence) {
      lseek (LOCAL->fd,elt->private.special.offset,L_SET);
      read (LOCAL->fd,LOCAL->buf,elt->private.special.text.size);
      if (LOCAL->buf[(j = elt->private.special.text.size) - 2] != '\r') {
	LOCAL->buf[j - 1] = '\r';
	LOCAL->buf[j++] = '\n';
      }
      if (write (fd,LOCAL->buf,j) < 0) ret = NIL;
      else {			/* internal header succeeded */
	s = unix_header (stream,i,&j,NIL);
				/* header size, sans trailing newline */
	if (j && (s[j - 4] == '\r')) j -= 2;
	if (write (fd,s,j) < 0) ret = NIL;
	else {			/* message header succeeded */
	  j = tstream ?		/* write UIDPLUS data if have readwrite */
	    unix_xstatus (stream,LOCAL->buf,elt,++(tstream->uid_last),LONGT) :
	    unix_xstatus (stream,LOCAL->buf,elt,NIL,NIL);
	  if (write (fd,LOCAL->buf,j) < 0) ret = NIL;
	  else {		/* message status succeeded */
	    s = unix_text_work (stream,elt,&j,NIL);
	    if ((write (fd,s,j) < 0) || (write (fd,"\r\n",2) < 0))
	      ret = NIL;
	    else if (cu) {	/* need to pass back new UID? */
	      mail_append_set (source,mail_uid (stream,i));
	      mail_append_set (dest,tstream->uid_last);
	    }
	  }
	}
      }
    }

  if (!ret || fsync (fd)) {	/* force out the update */
    sprintf (LOCAL->buf,"Message copy failed: %s",strerror (errno));
    ftruncate (fd,sbuf.st_size);
    ret = NIL;
  }
				/* force UIDVALIDITY assignment now */
  if (tstream && !tstream->uid_validity)
    tstream->uid_validity = (unsigned long) time (0);
				/* return sets if doing COPYUID */
  if (cu && ret) (*cu) (stream,mailbox,tstream->uid_validity,source,dest);
  else {			/* flush any sets we may have built */
    mail_free_searchset (&source);
    mail_free_searchset (&dest);
  }
  times.modtime = time (0);	/* set mtime to now */
				/* set atime to now-1 if successful copy */
  if (ret) times.actime = times.modtime - 1;
		
  else times.actime =		/* else preserve \Marked status */
	 ((sbuf.st_ctime > sbuf.st_atime) || (sbuf.st_mtime > sbuf.st_atime)) ?
	 sbuf.st_atime : times.modtime;
  utime (file,&times);		/* set the times */
  unix_unlock (fd,NIL,lock);	/* unlock and close mailbox */
  if (tstream) {		/* update last UID if we can */
    UNIXLOCAL * local = (UNIXLOCAL *) tstream->local;
    local->dirty = T;		/* do a rewrite */
    local->appending = T;	/* but not at the cost of marking as old */
    tstream = mail_close (tstream);
  }
				/* log the error */
  if (!ret) mm_log (LOCAL->buf,ERROR);
				/* delete if requested message */
  else if (options & CP_MOVE) for (i = 1; i <= stream->nmsgs; i++)
    if ((elt = mail_elt (stream,i))->sequence)
      elt->deleted = elt->private.dirty = LOCAL->dirty = T;
  mm_nocritical (stream);	/* release critical */
  return ret;
}

/* UNIX mail append message from stringstruct
 * Accepts: MAIL stream
 *	    destination mailbox
 *	    append callback
 *	    data for callback
 * Returns: T if append successful, else NIL
 */

#define BUFLEN 8*MAILTMPLEN

long unix_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
  struct stat sbuf;
  int fd;
  unsigned long i;
  char *flags,*date,buf[BUFLEN],tmp[MAILTMPLEN],file[MAILTMPLEN],
    lock[MAILTMPLEN];
  struct utimbuf times;
  FILE *sf,*df;
  MESSAGECACHE elt;
  STRING *message;
  unsigned long uidlocation = 0;
  appenduid_t au = (appenduid_t)
    (mail_parameters (NIL,GET_USERHASNOLIFE,NIL) ? NIL :
     mail_parameters (NIL,GET_APPENDUID,NIL));
  SEARCHSET *dst = au ? mail_newsearchset () : NIL;
  long ret = LONGT;
  MAILSTREAM *tstream = NIL;
  if (!stream) {		/* stream specified? */
    stream = &unixproto;	/* no, default stream to prototype */
    for (i = 0; i < NUSERFLAGS && stream->user_flags[i]; ++i)
      fs_give ((void **) &stream->user_flags[i]);
  }
  if (!unix_valid (mailbox)) switch (errno) {
  case ENOENT:			/* no such file? */
    if (!compare_cstring (mailbox,"INBOX")) {
      mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
      return NIL;
    }
    unix_create (NIL,"INBOX");	/* create empty INBOX */
  case 0:			/* merely empty file? */
    tstream = stream;
    break;
  case EACCES:			/* file protected */
    sprintf (tmp,"Can't access destination: %.80s",mailbox);
    MM_LOG (tmp,ERROR);
    return NIL;
  case EINVAL:
    sprintf (tmp,"Invalid UNIX-format mailbox name: %.80s",mailbox);
    mm_log (tmp,ERROR);
    return NIL;
  default:
    sprintf (tmp,"Not a UNIX-format mailbox: %.80s",mailbox);
    mm_log (tmp,ERROR);
    return NIL;
  }
				/* get sniffing stream for keywords */
  else if (!(tstream = mail_open (NIL,mailbox,
				  OP_READONLY|OP_SILENT|OP_NOKOD|OP_SNIFF))) {
    sprintf (tmp,"Unable to examine mailbox for APPEND: %.80s",mailbox);
    MM_LOG (tmp,ERROR);
    return NIL;
  }

				/* get first message */
  if (!(*af) (tstream,data,&flags,&date,&message)) return NIL;
  if (!(sf = tmpfile ())) {	/* must have scratch file */
    sprintf (tmp,".%lx.%lx",(unsigned long) time (0),(unsigned long)getpid ());
    if (!stat (tmp,&sbuf) || !(sf = fopen (tmp,"wb+"))) {
      sprintf (tmp,"Unable to create scratch file: %.80s",strerror (errno));
      mm_log (tmp,ERROR);
      return NIL;
    }
    unlink (tmp);
  }
  do {				/* parse date */
    if (!date) rfc822_date (date = tmp);
    if (!mail_parse_date (&elt,date)) {
      sprintf (tmp,"Bad date in append: %.80s",date);
      mm_log (tmp,ERROR);
    }
    else {			/* user wants to suppress time zones? */
      if (mail_parameters (NIL,GET_NOTIMEZONES,NIL)) {
	time_t when = mail_longdate (&elt);
	date = ctime (&when);	/* use traditional date */
      }
				/* use POSIX-style date */
      else date = mail_cdate (tmp,&elt);
      if (!SIZE (message)) mm_log ("Append of zero-length message",ERROR);
      else if (!unix_collect_msg (tstream,sf,flags,date,message)) {
	sprintf (tmp,"Error writing scratch file: %.80s",strerror (errno));
	mm_log (tmp,ERROR);
      }
				/* get next message */
      else if ((*af) (tstream,data,&flags,&date,&message)) continue;
    }
    fclose (sf);		/* punt scratch file */
    return NIL;			/* give up */
  } while (message);		/* until no more messages */
  if (fflush (sf)) {
    sprintf (tmp,"Error finishing scratch file: %.80s",strerror (errno));
    mm_log (tmp,ERROR);
    fclose (sf);		/* punt scratch file */
    return NIL;			/* give up */
  }
  i = ftell (sf);		/* size of scratch file */

				/* close sniffing stream */
  if (tstream != stream) tstream = mail_close (tstream);
  mm_critical (stream);		/* go critical */
				/* try to open readwrite for UIDPLUS */
  if ((tstream = mail_open_work (&unixdriver,NIL,mailbox,
				 OP_SILENT|OP_NOKOD)) && tstream->rdonly)
    tstream = mail_close (tstream);
  if (au && !tstream) {		/* wanted an APPENDUID? */
    sprintf (tmp,"Unable to re-open mailbox for APPENDUID: %.80s",mailbox);
    MM_LOG (tmp,WARN);
    au = NIL;
  }
  if (((fd = unix_lock (dummy_file (file,mailbox),
			O_BINARY|O_WRONLY|O_APPEND|O_CREAT,S_IREAD|S_IWRITE,
			lock,LOCK_EX)) < 0) || !(df = fdopen (fd,"ab"))) {
    mm_nocritical (stream);	/* done with critical */
    sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
    mm_log (tmp,ERROR);
    return NIL;
  }
  fstat (fd,&sbuf);		/* get current file size */
  rewind (sf);
  times.modtime = time (0);	/* set mtime to now */
				/* write all messages */
  if (!unix_append_msgs (tstream,sf,df,au ? dst : NIL) ||
      (fflush (df) == EOF) || fsync (fd)) {
    sprintf (buf,"Message append failed: %s",strerror (errno));
    mm_log (buf,ERROR);
    ftruncate (fd,sbuf.st_size);/* revert file */
    times.actime =		/* preserve \Marked status */
      ((sbuf.st_ctime > sbuf.st_atime) || (sbuf.st_mtime > sbuf.st_atime)) ?
      sbuf.st_atime : times.modtime;
    ret = NIL;			/* return error */
  }
				/* set atime to now-1 if successful copy */
  else times.actime = times.modtime - 1;
  utime (file,&times);		/* set the times */
  fclose (sf);			/* done with scratch file */
				/* force UIDVALIDITY assignment now */
  if (tstream && !tstream->uid_validity)
    tstream->uid_validity = (unsigned long) time (0);
				/* return sets if doing APPENDUID */
  if (au && ret) (*au) (mailbox,tstream->uid_validity,dst);
  else mail_free_searchset (&dst);
  flock (fd,LOCK_UN);		/* unlock mailbox (can't use unix_unlock() */
  if (lock && *lock) unlink (lock);
  fclose (df);			/* close mailbox */
  if (tstream) {		/* update last UID if we can */
    UNIXLOCAL * local = (UNIXLOCAL *) tstream->local;
    local->dirty = T;		/* do a rewrite */
    local->appending = T;	/* but not at the cost of marking as old */
    tstream = mail_close (tstream);
  }
  mm_nocritical (stream);	/* release critical */
  return ret;
}

/* Collect and write single message to append scratch file
 * Accepts: MAIL stream
 *	    scratch file
 *	    flags
 *	    date
 *	    message stringstruct
 * Returns: NIL if write error, else T
 */

int unix_collect_msg (MAILSTREAM *stream,FILE *sf,char *flags,char *date,
		     STRING *msg)
{
  unsigned char *s,*t;
  unsigned long uf;
  long f = mail_parse_flags (stream,flags,&uf);
				/* write metadata */
  if (fprintf (sf,"%ld %lu ",f,SIZE (msg) + 2) < 0) return NIL;
  for (s = date; *s; *s++) switch (*s) {
  default:
    if (putc (*s,sf) == EOF) return NIL;
  case '\r': case '\n':