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1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "log.h"
18 
19 #include <fcntl.h>
20 #include <linux/audit.h>
21 #include <string.h>
22 
23 #include <android-base/logging.h>
24 #include <selinux/selinux.h>
25 
26 namespace android {
27 namespace init {
28 
InitKernelLogging(char * argv[])29 void InitKernelLogging(char* argv[]) {
30     // Make stdin/stdout/stderr all point to /dev/null.
31     int fd = open("/sys/fs/selinux/null", O_RDWR);
32     if (fd == -1) {
33         int saved_errno = errno;
34         android::base::InitLogging(argv, &android::base::KernelLogger);
35         errno = saved_errno;
36         PLOG(FATAL) << "Couldn't open /sys/fs/selinux/null";
37     }
38     dup2(fd, 0);
39     dup2(fd, 1);
40     dup2(fd, 2);
41     if (fd > 2) close(fd);
42 
43     android::base::InitLogging(argv, &android::base::KernelLogger);
44 }
45 
selinux_klog_callback(int type,const char * fmt,...)46 int selinux_klog_callback(int type, const char *fmt, ...) {
47     android::base::LogSeverity severity = android::base::ERROR;
48     if (type == SELINUX_WARNING) {
49         severity = android::base::WARNING;
50     } else if (type == SELINUX_INFO) {
51         severity = android::base::INFO;
52     }
53     char buf[1024];
54     va_list ap;
55     va_start(ap, fmt);
56     vsnprintf(buf, sizeof(buf), fmt, ap);
57     va_end(ap);
58     android::base::KernelLogger(android::base::MAIN, severity, "selinux", nullptr, 0, buf);
59     return 0;
60 }
61 
62 }  // namespace init
63 }  // namespace android
64