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/* This file is part of the Project Athena Zephyr Notification System.
* It contains functions for dealing with acl's.
*
* Created by: John T. Kohl
*
* $Source$
* $Author$
*
* Copyright (c) 1987 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include <zephyr/mit-copyright.h>
#ifndef lint
#ifndef SABER
static char rcsid_access_c[] = "$Header$";
#endif SABER
#endif lint
/*
*
* External routines:
*
* int access_check(notice, acl, accesstype)
* ZNotice_t *notice;
* ZAcl_t *acl;
* ZAccess_t accesstype;
*
* void access_init();
*
* void access_reinit();
*/
/*
* Each restricted class has four ACL's associated with it,
* governing subscriptions, transmission, and instance restrictions.
* This module provides the 'glue' between the standard Athena ACL
* routines and the support needed by the Zephyr server.
*/
#include "zserver.h" /* includes <sys/file.h>,
<strings.h> */
#include <sys/param.h>
/*
* check access. return 1 if ok, 0 if not ok.
*/
int
access_check(notice, acl, accesstype)
ZNotice_t *notice;
ZAcl_t *acl;
ZAccess_t accesstype;
{
char buf[MAXPATHLEN]; /* holds the real acl name */
char *prefix;
switch (accesstype) {
case TRANSMIT:
prefix = "xmt";
break;
case SUBSCRIBE:
prefix = "sub";
break;
case INSTWILD:
prefix = "iws";
break;
case INSTUID:
prefix = "iui";
break;
default:
syslog(LOG_ERR, "unknown access type %d", (int) accesstype);
return(0);
}
(void) sprintf(buf, "%s%s-%s.acl",
ZEPHYR_ACL_DIR,
prefix,
acl->acl_filename);
if (access(buf, F_OK)) /* no acl ==> no restriction
==> thumbs up */
return(1);
return(acl_check(buf, notice->z_sender));
}
void
access_init()
{
char buf[MAXPATHLEN];
char class[512]; /* assume class names <= 511 bytes */
FILE *registry;
ZAcl_t *acl;
register int len;
register char *colon_idx;
Code_t retval;
(void) sprintf(buf, "%s%s", ZEPHYR_ACL_DIR, ZEPHYR_CLASS_REGISTRY);
if ((registry = fopen(buf, "r")) == (FILE *) NULL) {
syslog(LOG_ERR, "no registry available, all classes are free");
return;
}
while (fgets(class, 512, registry) != NULL) {
if (colon_idx = index(class, ':'))
*colon_idx = '\0';
else if (len = strlen(class))
class[len - 1] = '\0';
acl = (ZAcl_t *) xmalloc(sizeof(ZAcl_t));
if (!acl) {
syslog(LOG_ERR, "no mem acl alloc");
abort();
}
acl->acl_filename = strsave(class);
retval = class_setup_restricted(class, acl);
if (retval) {
syslog(LOG_ERR, "can't restrict %s: %s",
class, error_message(retval));
continue;
} else if (zdebug)
syslog(LOG_DEBUG, "restricted %s",
class, acl->acl_filename);
}
(void) fclose(registry);
return;
}
void
access_reinit()
{
/* re-initialize the restricted classes */
}
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