text: /*
   * 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>
  
  #ifdef AMAZON_LOG
  extern int lab126_log_write(int bufID, int prio, const char *tag, const char *fmt, ...);
  extern int __vitals_log_print(int bufID, int prio, const char *tag, const char *fmt, ...);
  #endif // AMAZON_LOG
  
  static int klog_fd = -1;
  static int klog_level = KLOG_DEFAULT_LEVEL;
  
  int klog_get_level(void) {
      return klog_level;
  }
  
  void klog_set_level(int level) {
      klog_level = level;
  }
  
  void klog_init(void)
  {
      static const char *name = "/dev/__kmsg__";
  
      if (klog_fd >= 0) return; /* Already initialized */
  
      if (mknod(name, S_IFCHR | 0600, (1 << 8) | 11) == 0) {
          klog_fd = open(name, O_WRONLY);
          if (klog_fd < 0)
                  return;
          fcntl(klog_fd, F_SETFD, FD_CLOEXEC);
          unlink(name);
      }
  }
  
  #define LOG_BUF_MAX 512
  
  void klog_vwrite(int level, const char *fmt, va_list ap)
  {
      char buf[LOG_BUF_MAX];
  
      if (level > klog_level) return;
      if (klog_fd < 0) klog_init();
      if (klog_fd < 0) return;
  
      vsnprintf(buf, LOG_BUF_MAX, fmt, ap);
      buf[LOG_BUF_MAX - 1] = 0;
  
      write(klog_fd, buf, strlen(buf));
  }
  
  void klog_write(int level, const char *fmt, ...)
  {
      va_list ap;
      va_start(ap, fmt);
      klog_vwrite(level, fmt, ap);
      va_end(ap);
  }
  