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## org.apache.tomcat.jni
Class OS

    java.lang.Object
      org.apache.tomcat.jni.OS

    public class OS

extends java.lang.Object

OS

Author:
  Mladen Turk

Field Summary
`static boolean` | `IS_BSD`
`static boolean` | `IS_LINUX`
`static boolean` | `IS_NETWARE`
`static boolean` | `IS_SOLARIS`
`static boolean` | `IS_UNIX`
`static boolean` | `IS_WIN32`
`static boolean` | `IS_WIN64`
`static int` | `LOG_DEBUG`
`static int` | `LOG_EMERG`
`static int` | `LOG_ERROR`
`static int` | `LOG_INFO`
`static int` | `LOG_NOTICE`
`static int` | `LOG_WARN`

Constructor Summary
`OS()`

Method Summary
`static java.lang.String` | `defaultEncoding(long pool)` Get the name of the system default characer set.
`static java.lang.String` | `expand(java.lang.String str)` Expand environment variables.
`static int` | `info(long[] inf)` Gather system info.
`static java.lang.String` | `localeEncoding(long pool)` Get the name of the current locale character set.
`static int` | `random(byte[] buf, int len)` Generate random bytes.
`static void` | `syslog(int level, java.lang.String message)` Log message.
`static void` | `sysloginit(java.lang.String domain)` Initialize system logging.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### LOG_EMERG

    public static final int LOG_EMERG

See Also:
  Constant Field Values

### LOG_ERROR

    public static final int LOG_ERROR

See Also:
  Constant Field Values

### LOG_NOTICE

    public static final int LOG_NOTICE

See Also:
  Constant Field Values

### LOG_WARN

    public static final int LOG_WARN

See Also:
  Constant Field Values

### LOG_INFO

    public static final int LOG_INFO

See Also:
  Constant Field Values

### LOG_DEBUG

    public static final int LOG_DEBUG

See Also:
  Constant Field Values

### IS_UNIX

    public static final boolean IS_UNIX

### IS_NETWARE

    public static final boolean IS_NETWARE

### IS_WIN32

    public static final boolean IS_WIN32

### IS_WIN64

    public static final boolean IS_WIN64

### IS_LINUX

    public static final boolean IS_LINUX

### IS_SOLARIS

    public static final boolean IS_SOLARIS

### IS_BSD

    public static final boolean IS_BSD

Constructor Detail

### OS

    public OS()

Method Detail

### defaultEncoding

    public static java.lang.String defaultEncoding(long pool)

  Get the name of the system default characer set.

  Parameters:
    `pool` - the pool to allocate the name from, if needed

### localeEncoding

    public static java.lang.String localeEncoding(long pool)

  Get the name of the current locale character set. Defers to apr_os_default_encoding if the current locale's data can't be retreved on this system.

  Parameters:
    `pool` - the pool to allocate the name from, if needed

### random

    public static int random(byte[] buf,
                             int len)

  Generate random bytes.

  Parameters:
    `buf` - Buffer to fill with random bytes
    `len` - Length of buffer in bytes

### info

    public static int info(long[] inf)

  Gather system info.

       On exit the inf array will be filled with:
       inf[0]  - Total usable main memory size
       inf[1]  - Available memory size
       inf[2]  - Total page file/swap space size
       inf[3]  - Page file/swap space still available
       inf[4]  - Amount of shared memory
       inf[5]  - Memory used by buffers
       inf[6]  - Memory Load

       inf[7]  - Idle Time in microseconds
       inf[8]  - Kernel Time in microseconds
       inf[9]  - User Time in microseconds

       inf[10] - Process creation time (apr_time_t)
       inf[11] - Process Kernel Time in microseconds
       inf[12] - Process User Time in microseconds

       inf[13] - Current working set size.
       inf[14] - Peak working set size.
       inf[15] - Number of page faults.

  Parameters:
    `inf` - array that will be filled with system information. Array length must be at least 16.

### expand

    public static java.lang.String expand(java.lang.String str)

  Expand environment variables.

  Parameters:
    `str` - String to expand
  Returns:
    Expanded string with replaced environment variables.

### sysloginit

    public static void sysloginit(java.lang.String domain)

  Initialize system logging.

  Parameters:
    `domain` - String that will be prepended to every message

### syslog

    public static void syslog(int level,
                              java.lang.String message)

  Log message.

  Parameters:
    `level` - Log message severity. See LOG_XXX enums.
    `message` - Message to log

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