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/*
* Copyright 2012, Samsung Telecommunications of America
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Written by William Roberts <w.roberts@sta.samsung.com>
*
*/
#include <errno.h>
#include <string.h>
#include <cutils/klog.h>
#include "auditd.h"
#include "libaudit.h"
/* Only should be used internally */
extern int audit_send(int fd, int type, const void *data, unsigned int size);
/* Depending on static to initialize this to 0 */
static const struct audit_status _new_audit_status;
int audit_set_pid(int fd, uint32_t pid, rep_wait_t wmode) {
int rc;
int line;
struct audit_reply rep;
struct audit_status status = _new_audit_status;
/*
* In order to set the auditd PID we send an audit message over the netlink socket
* with the pid field of the status struct set to our current pid, and the
* the mask set to AUDIT_STATUS_PID
*/
status.pid = pid;
status.mask = AUDIT_STATUS_PID;
/* Let the kernel know this pid will be registering for audit events */
rc = audit_send(fd, AUDIT_SET, &status, sizeof(status));
if (rc < 0) {
line = __LINE__;
goto err;
}
/*
* In a request where we need to wait for a response, wait for the message
* and discard it. This message confirms and sync's us with the kernel.
* This daemon is now registered as the audit logger. Only wait if the
* wmode is != WAIT_NO
*/
if (wmode != WAIT_NO) {
/* TODO
* If the daemon dies and restarts the message didn't come back,
* so I went to non-blocking and it seemed to fix the bug.
* Need to investigate further.
*/
(void)audit_get_reply(fd, &rep, GET_REPLY_NONBLOCKING, 0);
}
out:
return rc;
err:
errno = GETERRNO(rc);
ERROR("%s Failed in %s around line %d with error: %s\n", __FILE__, __FUNCTION__, line, strerror(errno));
rc = -1;
goto out;
}
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