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- /*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * 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.
- */
- #include <sys/stat.h>
- #include <sys/types.h>
- #include <fcntl.h>
- #include <stdarg.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <cutils/klog.h>
- static int klog_fd = -1;
- static int klog_level = KLOG_DEFAULT_LEVEL;
- void klog_set_level(int level) {
- klog_level = level;
- }
- void klog_init(void)
- {
- static const char *name = "/dev/__kmsg__";
- if (mknod(name, S_IFCHR | 0600, (1 << 8) | 11) == 0) {
- klog_fd = open(name, O_WRONLY);
- fcntl(klog_fd, F_SETFD, FD_CLOEXEC);
- unlink(name);
- }
- }
- #define LOG_BUF_MAX 512
- void klog_write(int level, const char *fmt, ...)
- {
- char buf[LOG_BUF_MAX];
- va_list ap;
- if (level > klog_level) return;
- if (klog_fd < 0) return;
- va_start(ap, fmt);
- vsnprintf(buf, LOG_BUF_MAX, fmt, ap);
- buf[LOG_BUF_MAX - 1] = 0;
- va_end(ap);
- write(klog_fd, buf, strlen(buf));
- }
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