dummydos.c

mgcp协议源代码。支持多种编码：g711

/*
 * Program:	Dummy routines for DOS
 *
 * Author:	Mark Crispin
 *		Networks and Distributed Computing
 *		Computing & Communications
 *		University of Washington
 *		Administration Building, AG-44
 *		Seattle, WA  98195
 *		Internet: [e-mail]
 *
 * Date:	24 May 1993
 * Last Edited:	28 August 2000
 *
 * Copyright 2000 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 <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include "mail.h"
#include "osdep.h"
#include <sys\stat.h>
#include <dos.h>
#include "dummy.h"
#include "misc.h"

long dummy_badname (char *tmp,char *s);

/* Dummy routines */


/* Driver dispatch used by MAIL */

DRIVER dummydriver = {
  "dummy",			/* driver name */
  DR_LOCAL|DR_MAIL,		/* driver flags */
  (DRIVER *) NIL,		/* next driver */
  dummy_valid,			/* mailbox is valid for us */
  dummy_parameters,		/* manipulate parameters */
  dummy_scan,			/* scan mailboxes */
  dummy_list,			/* list mailboxes */
  dummy_lsub,			/* list subscribed mailboxes */
  dummy_subscribe,		/* subscribe to mailbox */
  NIL,				/* unsubscribe from mailbox */
  dummy_create,			/* create mailbox */
  dummy_delete,			/* delete mailbox */
  dummy_rename,			/* rename mailbox */
  NIL,				/* status of mailbox */
  dummy_open,			/* open mailbox */
  dummy_close,			/* close mailbox */
  NIL,				/* fetch message "fast" attributes */
  NIL,				/* fetch message flags */
  NIL,				/* fetch overview */
  NIL,				/* fetch message structure */
  NIL,				/* fetch header */
  NIL,				/* fetch text */
  NIL,				/* fetch message data */
  NIL,				/* unique identifier */
  NIL,				/* message number from UID */
  NIL,				/* modify flags */
  NIL,				/* per-message modify flags */
  NIL,				/* search for message based on criteria */
  NIL,				/* sort messages */
  NIL,				/* thread messages */
  dummy_ping,			/* ping mailbox to see if still alive */
  dummy_check,			/* check for new messages */
  dummy_expunge,		/* expunge deleted messages */
  dummy_copy,			/* copy messages to another mailbox */
  dummy_append,			/* append string message to mailbox */
  NIL				/* garbage collect stream */
};


				/* prototype stream */
MAILSTREAM dummyproto = {&dummydriver};

				/* driver parameters */
static char *file_extension = NIL;

/* Dummy validate mailbox
 * Accepts: mailbox name
 * Returns: our driver if name is valid, NIL otherwise
 */

DRIVER *dummy_valid (char *name)
{
  char *s,tmp[MAILTMPLEN];
  struct stat sbuf;
				/* must be valid local mailbox */
  return (name && *name && (*name != '{') &&
	  (s = mailboxfile (tmp,name)) && (!*s || !stat (s,&sbuf))) ?
	    &dummydriver : NIL;
}


/* Dummy manipulate driver parameters
 * Accepts: function code
 *	    function-dependent value
 * Returns: function-dependent return value
 */

void *dummy_parameters (long function,void *value)
{
  void *ret = NIL;
  switch ((int) function) {
  case SET_EXTENSION:
    if (file_extension) fs_give ((void **) &file_extension);
    if (*(char *) value) file_extension = cpystr ((char *) value);
  case GET_EXTENSION:
    ret = (void *) file_extension;
  }
  return ret;
}

/* Dummy scan mailboxes
 * Accepts: mail stream
 *	    reference
 *	    pattern to search
 *	    string to scan
 */

#define LISTTMPLEN 128

void dummy_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
  char *s,test[LISTTMPLEN],file[LISTTMPLEN];
  long i = 0;
  if (!pat || !*pat) {		/* empty pattern? */
    if (dummy_canonicalize (test,ref,"*")) {
				/* tie off name at root */
      if (s = strchr (test,'\\')) *++s = '\0';
      else test[0] = '\0';
      dummy_listed (stream,'\\',test,LATT_NOINFERIORS,NIL);
    }
  }
				/* get canonical form of name */
  else if (dummy_canonicalize (test,ref,pat)) {
				/* found any wildcards? */
    if (s = strpbrk (test,"%*")) {
				/* yes, copy name up to that point */
      strncpy (file,test,(size_t) (i = s - test));
      file[i] = '\0';		/* tie off */
    }
    else strcpy (file,test);	/* use just that name then */
				/* find directory name */
    if (s = strrchr (file,'\\')) {
      *++s = '\0';		/* found, tie off at that point */
      s = file;
    }
				/* silly case */
    else if (file[0] == '#') s = file;
				/* do the work */
    dummy_list_work (stream,s,test,contents,0);
    if (pmatch ("INBOX",test))	/* always an INBOX */
      dummy_listed (stream,NIL,"INBOX",LATT_NOINFERIORS,contents);
  }
}

/* Dummy list mailboxes
 * Accepts: mail stream
 *	    reference
 *	    pattern to search
 */

void dummy_list (MAILSTREAM *stream,char *ref,char *pat)
{
  dummy_scan (stream,ref,pat,NIL);
}


/* Dummy list subscribed mailboxes
 * Accepts: mail stream
 *	    pattern to search
 */

void dummy_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
  void *sdb = NIL;
  char *s,*t,test[MAILTMPLEN];
  int showuppers = pat[strlen (pat) - 1] == '%';
				/* get canonical form of name */
  if (dummy_canonicalize (test,ref,pat) && (s = sm_read (&sdb))) do
    if (*s != '{') {
      if (pmatch_full (s,test,'\\')) {
	if (pmatch (s,"INBOX")) mm_lsub (stream,NIL,s,LATT_NOINFERIORS);
	else mm_lsub (stream,'\\',s,NIL);
      }
      else while (showuppers && (t = strrchr (s,'\\'))) {
	*t = '\0';		/* tie off the name */
	if (pmatch_full (s,test,'\\')) mm_lsub (stream,'\\',s,LATT_NOSELECT);
      }
    }
  while (s = sm_read (&sdb));	/* until no more subscriptions */
}


/* Dummy subscribe to mailbox
 * Accepts: mail stream
 *	    mailbox to add to subscription list
 * Returns: T on success, NIL on failure
 */

long dummy_subscribe (MAILSTREAM *stream,char *mailbox)
{
  char *s,tmp[MAILTMPLEN];
  struct stat sbuf;
				/* must be valid local mailbox */
  if ((s = mailboxfile (tmp,mailbox)) && *s && !stat (s,&sbuf) &&
      ((sbuf.st_mode & S_IFMT) == S_IFREG)) return sm_subscribe (mailbox);
  sprintf (tmp,"Can't subscribe %s: not a mailbox",mailbox);
  mm_log (tmp,ERROR);
  return NIL;
}

/* Dummy list mailboxes worker routine
 * Accepts: mail stream
 *	    directory name to search
 *	    search pattern
 *	    string to scan
 *	    search level
 */

void dummy_list_work (MAILSTREAM *stream,char *dir,char *pat,char *contents,
		      long level)
{
  struct find_t f;
  struct stat sbuf;
  char *s,tmp[LISTTMPLEN],tmpx[LISTTMPLEN];
  char *base = (dir && (dir[0] == '\\')) ? NIL : myhomedir ();
				/* build name */
  if (base) sprintf (tmpx,"%s\\",base);
  else tmpx[0] = '\0';
  if (dir) strcat (tmpx,dir);
				/* punt if bogus name */
  if (!mailboxfile (tmp,tmpx)) return;
				/* make directory wildcard */
  strcat (tmp,(tmp[strlen (tmp) -1] == '\\') ? "*." : "\\*.");
  strcat (tmp,file_extension ? file_extension : "*");
				/* do nothing if can't open directory */
  if (!_dos_findfirst (tmp,_A_NORMAL|_A_SUBDIR,&f)) {
				/* list it if not at top-level */
    if (!level && dir && pmatch_full (dir,pat,'\\'))
      dummy_listed (stream,'\\',dir,LATT_NOSELECT,contents);
				/* scan directory */
    if (tmpx[strlen (tmpx) - 1] == '\\') do if (*f.name != '.') {
      if (base) sprintf (tmpx,"%s\\",base);
      else tmpx[0] = '\0';
      if (dir) sprintf (tmpx + strlen (tmpx),"%s%s",dir,f.name);
      else strcat (tmpx,f.name);
      if (!stat (mailboxfile (tmp,tmpx),&sbuf)) {
				/* suppress extension */
	if (file_extension && (s = strchr (f.name,'.'))) *s = '\0';
				/* now make name we'd return */
	if (dir) sprintf (tmp,"%s%s",dir,f.name);
	else strcpy (tmp,f.name);
				/* only interested in file type */
	switch (sbuf.st_mode & S_IFMT) {
	case S_IFDIR:		/* directory? */
	  if (pmatch_full (tmp,pat,'\\')) {
	    dummy_listed (stream,'\\',tmp,LATT_NOSELECT,contents);
	    strcat (tmp,"\\");	/* set up for dmatch call */
	  }
				/* try again with trailing / */
	  else if (pmatch_full (strcat (tmp,"\\"),pat,'\\'))
	    dummy_listed (stream,'\\',tmp,LATT_NOSELECT,contents);
	  if (dmatch (tmp,pat,'\\') &&
	      (level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL)))
	    dummy_list_work (stream,tmp,pat,contents,level+1);
	  break;
	case S_IFREG:		/* ordinary name */
	  if (pmatch_full (tmp,pat,'\\') && !pmatch ("INBOX",tmp))
	    dummy_listed (stream,'\\',tmp,LATT_NOINFERIORS,contents);
	  break;
	}
      }
    }
    while (!_dos_findnext (&f));
  }
}

/* Mailbox found
 * Accepts: hierarchy delimiter
 *	    mailbox name
 *	    attributes
 *	    contents to search before calling mm_list()
 * Returns: T, always
 */

#define BUFSIZE MAILTMPLEN

long dummy_listed (MAILSTREAM *stream,char delimiter,char *name,
		   long attributes,char *contents)
{
  struct stat sbuf;
  int fd;
  size_t csiz,ssiz,bsiz;
  char *buf,tmp[MAILTMPLEN];
  if (contents) {		/* want to search contents? */
				/* forget it if can't select or open */
    if ((attributes & LATT_NOSELECT) || !(csiz = strlen (contents)) ||
	stat (mailboxfile (tmp,name),&sbuf) || (csiz > sbuf.st_size) ||
	((fd = open (tmp,O_RDONLY,NIL)) < 0)) return T;
				/* get buffer including slop */    
    buf = (char *) fs_get (BUFSIZE + (ssiz = 4 * ((csiz / 4) + 1)) + 1);
    memset (buf,'\0',ssiz);	/* no slop area the first time */
    while (sbuf.st_size) {	/* until end of file */
      read (fd,buf+ssiz,bsiz = min (sbuf.st_size,BUFSIZE));
      if (search ((unsigned char *) buf,bsiz+ssiz,
		  (unsigned char *) contents,csiz)) break;
      memcpy (buf,buf+BUFSIZE,ssiz);
      sbuf.st_size -= bsiz;	/* note that we read that much */