dummywce.c
上传用户:ycwykj01
上传日期:2007-01-04
资源大小:1819k
文件大小:9k
- /*
- * Program: Dummy routines for WCE
- *
- * 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 May 1993
- * Last Edited: 4 September 1999
- *
- * Copyright 1999 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 <stdio.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <direct.h>
- #include "mail.h"
- #include "osdep.h"
- #include <sysstat.h>
- #include <dos.h>
- #include "dummy.h"
- #include "misc.h"
- /* 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 */
- NIL, /* 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)
- {
- return value;
- }
- /* Dummy scan mailboxes
- * Accepts: mail stream
- * reference
- * pattern to search
- * string to scan
- */
- void dummy_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
- {
- /* return silently */
- }
- /* Dummy list mailboxes
- * Accepts: mail stream
- * reference
- * pattern to search
- */
- void dummy_list (MAILSTREAM *stream,char *ref,char *pat)
- {
- /* return silently */
- }
- /* Dummy list subscribed mailboxes
- * Accepts: mail stream
- * pattern to search
- */
- void dummy_lsub (MAILSTREAM *stream,char *ref,char *pat)
- {
- /* return silently */
- }
- /* Dummy create mailbox
- * Accepts: mail stream
- * mailbox name to create
- * Returns: T on success, NIL on failure
- */
- long dummy_create (MAILSTREAM *stream,char *mailbox)
- {
- return NIL; /* always fails */
- }
- /* Dummy delete mailbox
- * Accepts: mail stream
- * mailbox name to delete
- * Returns: T on success, NIL on failure
- */
- long dummy_delete (MAILSTREAM *stream,char *mailbox)
- {
- return NIL; /* always fails */
- }
- /* 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)
- {
- return NIL; /* always fails */
- }
- /* Dummy open
- * Accepts: stream to open
- * Returns: stream on success, NIL on failure
- */
- MAILSTREAM *dummy_open (MAILSTREAM *stream)
- {
- char tmp[MAILTMPLEN];
- /* OP_PROTOTYPE call or silence */
- if (!stream || stream->silent) return NIL;
- if (strcmp (ucase (strcpy (tmp,stream->mailbox)),"INBOX")) {
- sprintf (tmp,"Not a mailbox: %s",stream->mailbox);
- mm_log (tmp,ERROR);
- return NIL; /* always fails */
- }
- if (!stream->silent) { /* only if silence not requested */
- mail_exists (stream,0); /* say there are 0 messages */
- mail_recent (stream,0);
- 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
- * No-op for readonly files, since read/writer can expunge it from under us!
- */
- long dummy_ping (MAILSTREAM *stream)
- {
- 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
- * stringstruct of message to append
- * Returns: T on success, NIL on failure
- */
- long dummy_append (MAILSTREAM *stream,char *mailbox,char *flags,char *date,
- STRING *message)
- {
- char tmp[MAILTMPLEN];
- sprintf (tmp,"Can't append to %s",mailbox);
- mm_log (tmp,ERROR); /* pass up error */
- return NIL; /* always fails */
- }
- /* 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] = ' ';
- if (ref) switch (*ref) { /* preliminary reference check */
- case '{': /* remote names not allowed */
- return NIL; /* disallowed */
- case ' ': /* 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;
- }