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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* @(#)audit_path.c 2.7 92/02/16 SMI; SunOS CMW
* @(#)audit_path.c 4.2.1.2 91/05/08 SMI; BSM Module
*
* This code does the audit path processes. Part of this is still in
* audit.c and will be moved here when time permits.
*
* Note that audit debuging is enabled here. We will turn it off at
* beta shipment.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/user.h>
#include <sys/vnode.h>
#include <sys/vfs.h>
#include <sys/kmem.h> /* for KM_SLEEP */
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/pathname.h>
#include <sys/acct.h>
#include <c2/audit.h>
#include <c2/audit_kernel.h>
#include <c2/audit_record.h>
#include <sys/sysmacros.h>
#include <sys/atomic.h>
int
au_token_size(m)
token_t *m;
{
int i;
if (m == (token_t *)0)
return (0);
for (i = 0; m != (token_t *)0; m = m->next_buf)
i += m->len;
return (i);
}
token_t *
au_set(cp, size)
caddr_t cp;
uint_t size;
{
au_buff_t *head;
au_buff_t *tail;
au_buff_t *m;
uint_t l;
head = NULL;
tail = NULL; /* only to satisfy lint */
while (size) {
m = au_get_buff();
l = MIN(size, AU_BUFSIZE);
bcopy(cp, memtod(m, char *), l);
m->len = l;
if (head)
tail->next_buf = m; /* tail set if head set */
else
head = m;
tail = m;
size -= l;
cp += l;
}
return (head);
}
token_t *
au_append_token(chain, m)
token_t *chain;
token_t *m;
{
token_t *mbp;
if (chain == (token_t *)0)
return (m);
if (m == (token_t *)0)
return (chain);
for (mbp = chain; mbp->next_buf != (token_t *)0; mbp = mbp->next_buf)
;
mbp->next_buf = m;
return (chain);
}
void
audit_fixpath(struct audit_path *app, int len)
{
int id; /* index of where we are in destination string */
int is; /* index of where we are in source string */
int cnt; /* # of levels in audit_path */
int slashseen; /* have we seen a slash */
char *s; /* start of top-level string */
char c;
cnt = app->audp_cnt;
s = app->audp_sect[cnt - 1];
is = (app->audp_sect[cnt] - s) - len;
if (is <= 2)
is = 0; /* catch leading // or ./ */
slashseen = (is > 0);
for (id = is; ; is++) {
if ((c = s[is]) == '\0') {
/* that's all folks, we've reached the end of input */
if (id > 1 && s[id-1] == '/') {
/* remove terminating / */
--id;
}
s[id++] = '\0';
break;
}
if (slashseen) {
/* previous character was a / */
if (c == '/') {
/* another slash, ignore it */
continue;
}
} else if (c == '/') {
/* we see a /, just copy it and try again */
slashseen = 1;
s[id++] = c;
continue;
}
if (c == '.') {
if ((c = s[is+1]) == '\0') {
/* XXX/. seen */
if (id > 1)
id--;
continue;
}
if (c == '/') {
/* XXX/./ seen */
is += 1;
continue;
}
if (c == '.' && (s[is+2] == '\0' || s[is+2] == '/')) {
/* XXX/.. or XXX/../ seen */
is++;
if (id == 0 && cnt > 1) {
char *s_attr;
/* .. refers to attributed object */
app->audp_cnt = --cnt;
s_attr = s;
s = app->audp_sect[cnt - 1];
id = s_attr - s;
is += id;
id--;
slashseen = 0;
continue;
}
/* backup over previous component */
if (id > 0)
id--;
while (id > 0 && s[id - 1] != '/')
id--;
continue;
}
}
/* copy component name and terminating /, if any */
for (;;) {
c = s[is++];
if (c == '\0' || c == '/')
break;
s[id++] = c;
}
/* back up to before terminating '\0' or / */
slashseen = 0;
is -= 2;
}
/* fill empty attribute directory reference */
if (id == 1 && cnt > 1) {
s[0] = '.';
s[1] = '\0';
id = 2;
}
/* correct end pointer */
app->audp_sect[cnt] = s + id;
}
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