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/* ========================================================================
* Copyright 1988-2006 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* ========================================================================
*/
/*
* Program: Subscription Manager
*
* 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 December 1992
* Last Edited: 6 December 2006
*/
#include <stdio.h>
#include <ctype.h>
#include "c-client.h"
/* Subscribe to mailbox
* Accepts: mailbox name
* Returns: T on success, NIL on failure
*/
long sm_subscribe (char *mailbox)
{
FILE *f;
char *s,db[MAILTMPLEN],tmp[MAILTMPLEN];
/* canonicalize INBOX */
if (!compare_cstring (mailbox,"INBOX")) mailbox = "INBOX";
SUBSCRIPTIONFILE (db); /* open subscription database */
if (f = fopen (db,"r")) { /* make sure not already there */
while (fgets (tmp,MAILTMPLEN,f)) {
if (s = strchr (tmp,'\n')) *s = '\0';
if (!strcmp (tmp,mailbox)) {/* already subscribed? */
sprintf (tmp,"Already subscribed to mailbox %.80s",mailbox);
MM_LOG (tmp,ERROR);
fclose (f);
return NIL;
}
}
fclose (f);
}
if (!(f = fopen (db,"a"))) { /* append new entry */
MM_LOG ("Can't append to subscription database",ERROR);
return NIL;
}
fprintf (f,"%s\n",mailbox);
return (fclose (f) == EOF) ? NIL : T;
}
/* Unsubscribe from mailbox
* Accepts: mailbox name
* Returns: T on success, NIL on failure
*/
long sm_unsubscribe (char *mailbox)
{
FILE *f,*tf;
char *s,tmp[MAILTMPLEN],old[MAILTMPLEN],newname[MAILTMPLEN];
int found = NIL;
/* canonicalize INBOX */
if (!compare_cstring (mailbox,"INBOX")) mailbox = "INBOX";
SUBSCRIPTIONFILE (old); /* make file names */
SUBSCRIPTIONTEMP (newname);
if (!(f = fopen (old,"r"))) /* open subscription database */
MM_LOG ("No subscriptions",ERROR);
else if (!(tf = fopen (newname,"w"))) {
MM_LOG ("Can't create subscription temporary file",ERROR);
fclose (f);
}
else {
while (fgets (tmp,MAILTMPLEN,f)) {
if (s = strchr (tmp,'\n')) *s = '\0';
if (strcmp (tmp,mailbox)) fprintf (tf,"%s\n",tmp);
else found = T; /* found the name */
}
fclose (f);
if (fclose (tf) == EOF)
MM_LOG ("Can't write subscription temporary file",ERROR);
else if (!found) {
sprintf (tmp,"Not subscribed to mailbox %.80s",mailbox);
MM_LOG (tmp,ERROR); /* error if at end */
}
else if (!unlink (old) && !rename (newname,old)) return LONGT;
else MM_LOG ("Can't update subscription database",ERROR);
}
return NIL;
}
/* Read subscription database
* Accepts: pointer to subscription database handle (handle NIL if first time)
* Returns: character string for subscription database or NIL if done
*/
static char sbname[MAILTMPLEN];
char *sm_read (void **sdb)
{
FILE *f = (FILE *) *sdb;
char *s;
if (!f) { /* first time through? */
SUBSCRIPTIONFILE (sbname); /* open subscription database */
/* make sure not already there */
if (f = fopen (sbname,"r")) *sdb = (void *) f;
else return NIL;
}
if (fgets (sbname,MAILTMPLEN,f)) {
if (s = strchr (sbname,'\n')) *s = '\0';
return sbname;
}
fclose (f); /* all done */
*sdb = NIL; /* zap sdb */
return NIL;
}
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