dummynt.c

mgcp协议源代码。支持多种编码：g711

  mm_list (stream,delimiter,name,attributes);
  return T;
}

/* Dummy create mailbox
 * Accepts: mail stream
 *	    mailbox name to create
 * Returns: T on success, NIL on failure
 */

long dummy_create (MAILSTREAM *stream,char *mailbox)
{
  char tmp[MAILTMPLEN];
  if (strcmp (ucase (strcpy (tmp,mailbox)),"INBOX") && dummy_file(tmp,mailbox))
    return dummy_create_path (stream,tmp);
  sprintf (tmp,"Can't create %s: invalid name",mailbox);
  mm_log (tmp,ERROR);
  return NIL;
}


/* Dummy create path
 * Accepts: mail stream
 *	    path name name to create
 * Returns: T on success, NIL on failure
 */

long dummy_create_path (MAILSTREAM *stream,char *path)
{
  struct stat sbuf;
  char c,*s,tmp[MAILTMPLEN];
  int fd;
  long ret = NIL;
  char *t = strrchr (path,'\\');
  char *pt = (path[1] == ':') ? path + 2 : path;
  int wantdir = t && !t[1];
  if (wantdir) *t = '\0';	/* flush trailing delimiter for directory */
				/* found superior to this name? */
  if ((s = strrchr (pt,'\\')) && (s != pt)) {
    strncpy (tmp,path,(size_t) (s - path));
    tmp[s - path] = '\0';	/* make directory name for stat */
    c = *++s;			/* tie off in case need to recurse */
    *s = '\0';
				/* name doesn't exist, create it */
    if ((stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
	!dummy_create_path (stream,path)) return NIL;
    *s = c;			/* restore full name */
  }
  if (wantdir) {		/* want to create directory? */
    ret = !mkdir (path);
    *t = '\\';			/* restore directory delimiter */
  }
				/* create file */
  else if ((fd = open (path,O_WRONLY|O_CREAT|O_EXCL,S_IREAD|S_IWRITE)) >= 0)
    ret = !close (fd);		/* close file */
  if (!ret) {			/* error? */
    sprintf (tmp,"Can't create mailbox node %s: %s",path,strerror (errno));
    mm_log (tmp,ERROR);
  }
  return ret;			/* return status */
}

/* Dummy delete mailbox
 * Accepts: mail stream
 *	    mailbox name to delete
 * Returns: T on success, NIL on failure
 */

long dummy_delete (MAILSTREAM *stream,char *mailbox)
{
  struct stat sbuf;
  char *s,tmp[MAILTMPLEN];
				/* no trailing \ */
  if ((s = strrchr (dummy_file (tmp,mailbox),'\\')) && !s[1]) *s = '\0';
  if (stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) == S_IFDIR) ?
      rmdir (tmp) : unlink (tmp)) {
    sprintf (tmp,"Can't delete mailbox %s: %s",mailbox,strerror (errno));
    mm_log (tmp,ERROR);
    return NIL;
  }
  return T;			/* return success */
}


/* Mail rename mailbox
 * Accepts: mail stream
 *	    old mailbox name
 *	    new mailbox name
 * Returns: T on success, NIL on failure
 */

long dummy_rename (MAILSTREAM *stream,char *old,char *newname)
{
  struct stat sbuf;
  char c,*s,tmp[MAILTMPLEN],mbx[MAILTMPLEN];
  long ret = NIL;
				/* no trailing \ allowed */
  if (!(s = dummy_file (mbx,newname)) || ((s = strrchr (s,'\\')) && !s[1])) {
    sprintf (mbx,"Can't rename %s to %s: invalid name",old,newname);
    mm_log (mbx,ERROR);
    return NIL;
  }
				/* found superior to destination name? */
  if (s && (s != mbx) && ((mbx[1] != ':') || (s != mbx + 2))) {
    c = s[1];			/* remember character after delimiter */
    *s = s[1] = '\0';		/* tie off name at delimiter */
				/* name doesn't exist, create it */
    if (stat (mbx,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) {
      *s = '\\';		/* restore delimiter */
      if (!dummy_create (stream,mbx)) return NIL;
    }
    else *s = '\\';		/* restore delimiter */
    s[1] = c;			/* restore character after delimiter */
  }
				/* rename of non-ex INBOX creates dest */
  if (!strcmp (ucase (strcpy (tmp,old)),"INBOX") &&
      stat (dummy_file (tmp,old),&sbuf)) return dummy_create (NIL,mbx);
  if (rename (dummy_file (tmp,old),mbx)) {
    sprintf (tmp,"Can't rename mailbox %s to %s: %s",old,newname,
	     strerror (errno));
    mm_log (tmp,ERROR);
    return NIL;
  }
  return LONGT;			/* return success */
}

/* Dummy open
 * Accepts: stream to open
 * Returns: stream on success, NIL on failure
 */

MAILSTREAM *dummy_open (MAILSTREAM *stream)
{
  int fd;
  char err[MAILTMPLEN],tmp[MAILTMPLEN];
  struct stat sbuf;
				/* OP_PROTOTYPE call */
  if (!stream) return &dummyproto;
  err[0] = '\0';		/* no error message yet */
				/* can we open the file? */
  if ((fd = open (dummy_file (tmp,stream->mailbox),O_RDONLY,NIL)) < 0) {
				/* no, error unless INBOX */
    if (strcmp (ucase (strcpy (tmp,stream->mailbox)),"INBOX"))
      sprintf (err,"%s: %s",strerror (errno),stream->mailbox);
  }
  else {			/* file had better be empty then */
    fstat (fd,&sbuf);		/* sniff at its size */
    close (fd);
    if (sbuf.st_size)		/* bogus format if non-empty */
      sprintf (err,"%s (file %s) is not in valid mailbox format",
	       stream->mailbox,tmp);
  }
  if (err[0]) {			/* if an error happened */
    mm_log (err,stream->silent ? WARN : ERROR);
    return NIL;
  }
  else if (!stream->silent) {	/* only if silence not requested */
    mail_exists (stream,0);	/* say there are 0 messages */
    mail_recent (stream,0);	/* and certainly no recent ones! */
    stream->uid_validity = 1;
  }
  stream->inbox = T;		/* note that it's an INBOX */
  return stream;		/* return success */
}


/* Dummy close
 * Accepts: MAIL stream
 *	    options
 */

void dummy_close (MAILSTREAM *stream,long options)
{
				/* return silently */
}

/* Dummy ping mailbox
 * Accepts: MAIL stream
 * Returns: T if stream alive, else NIL
 */

long dummy_ping (MAILSTREAM *stream)
{
				/* time to do another test? */
  if (time (0) >= ((time_t) (stream->gensym + 30))) {
    MAILSTREAM *test = mail_open (NIL,stream->mailbox,OP_PROTOTYPE);
    if (!test) return NIL;	/* can't get a prototype?? */
    if (test->dtb == stream->dtb) {
      stream->gensym = time (0);/* still hasn't changed */
      return T;			/* try again later */
    }
				/* looks like a new driver? */
    if (!(test = mail_open (NIL,stream->mailbox,NIL))) return NIL;
    mail_close ((MAILSTREAM *)	/* flush resources used by dummy stream */
		memcpy (fs_get (sizeof (MAILSTREAM)),stream,
			sizeof (MAILSTREAM)));
				/* swap the streams */
    memcpy (stream,test,sizeof (MAILSTREAM));
    fs_give ((void **) &test);	/* flush test now that copied */
  }
  return T;
}


/* Dummy check mailbox
 * Accepts: MAIL stream
 * No-op for readonly files, since read/writer can expunge it from under us!
 */

void dummy_check (MAILSTREAM *stream)
{
  dummy_ping (stream);		/* invoke ping */
}


/* Dummy expunge mailbox
 * Accepts: MAIL stream
 */

void dummy_expunge (MAILSTREAM *stream)
{
				/* return silently */
}

/* Dummy copy message(s)
 * Accepts: MAIL stream
 *	    sequence
 *	    destination mailbox
 *	    options
 * Returns: T if copy successful, else NIL
 */

long dummy_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
  if ((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
      mail_sequence (stream,sequence)) fatal ("Impossible dummy_copy");
  return NIL;
}


/* Dummy append message string
 * Accepts: mail stream
 *	    destination mailbox
 *	    append callback function
 *	    data for callback
 * Returns: T on success, NIL on failure
 */

long dummy_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
  struct stat sbuf;
  int fd = -1;
  int e;
  char tmp[MAILTMPLEN];
  MAILSTREAM *ts = default_proto (T);
  if ((strcmp (ucase (strcpy (tmp,mailbox)),"INBOX")) &&
	   ((fd = open (dummy_file (tmp,mailbox),O_RDONLY,NIL)) < 0)) {
    if ((e = errno) == ENOENT)	/* failed, was it no such file? */
      mm_notify (stream,"[TRYCREATE] Must create mailbox before append",
		 (long) NIL);
    sprintf (tmp,"%s: %s",strerror (e),mailbox);
    mm_log (tmp,ERROR);		/* pass up error */
    return NIL;			/* always fails */
  }
  if (fd >= 0) {		/* found file? */
    fstat (fd,&sbuf);		/* get its size */
    close (fd);			/* toss out the fd */
    if (sbuf.st_size) ts = NIL;	/* non-empty file? */
  }
  if (ts) return (*ts->dtb->append) (stream,mailbox,af,data);
  sprintf (tmp,"Indeterminate mailbox format: %s",mailbox);
  mm_log (tmp,ERROR);
  return NIL;
}

/* Dummy mail generate file string
 * Accepts: temporary buffer to write into
 *	    mailbox name string
 * Returns: local file string or NIL if failure
 */

char *dummy_file (char *dst,char *name)
{
  char *s = mailboxfile (dst,name);
				/* return our standard inbox */
  return (s && !*s) ? strcpy (dst,sysinbox ()) : s;
}


/* Dummy canonicalize name
 * Accepts: buffer to write name
 *	    reference
 *	    pattern
 * Returns: T if success, NIL if failure
 */

long dummy_canonicalize (char *tmp,char *ref,char *pat)
{
  char dev[4];
				/* initially no device */
  dev[0] = dev[1] = dev[2] = dev[3] = '\0';
  if (ref) switch (*ref) {	/* preliminary reference check */
  case '{':			/* remote names not allowed */
    return NIL;			/* disallowed */
  case '\0':			/* empty reference string */
    break;
  default:			/* all other names */
    if (ref[1] == ':') {	/* start with device name? */
      dev[0] = *ref++; dev[1] = *ref++;
    }
    break;
  }
  if (pat[1] == ':') {		/* device name in pattern? */
    dev[0] = *pat++; dev[1] = *pat++;
    ref = NIL;			/* ignore reference */
  }
  switch (*pat) {
  case '#':			/* namespace names */
    if (mailboxfile (tmp,pat)) strcpy (tmp,pat);
    else return NIL;		/* unknown namespace */
    break;
  case '{':			/* remote names not allowed */
    return NIL;
  case '\\':			/* rooted name */
    ref = NIL;			/* ignore reference */
    break;
  }
				/* make sure device names are rooted */
  if (dev[0] && (*(ref ? ref : pat) != '\\')) dev[2] = '\\';
				/* build name */
  sprintf (tmp,"%s%s%s",dev,ref ? ref : "",pat);
  ucase (tmp);			/* force upper case */
  return T;
}