Package oshi.software.os.unix.freebsd

Class FreeBsdOperatingSystem

  • All Implemented Interfaces:
    OperatingSystem
    @ThreadSafe
public class FreeBsdOperatingSystem
extends AbstractOperatingSystem
    FreeBSD is a free and open-source Unix-like operating system descended from the Berkeley Software Distribution (BSD), which was based on Research Unix. The first version of FreeBSD was released in 1993. In 2005, FreeBSD was the most popular open-source BSD operating system, accounting for more than three-quarters of all installed simply, permissively licensed BSD systems.

    • Field Detail

      • LOG

        private static final org.slf4j.Logger LOG

      • BOOTTIME

        private static final long BOOTTIME

      • PS_COMMAND_ARGS

        static final java.lang.String PS_COMMAND_ARGS

    • Constructor Detail

      • FreeBsdOperatingSystem

        public FreeBsdOperatingSystem()

    • Method Detail

      • queryBitness

        protected int queryBitness​(int jvmBitness)
        Description copied from class: AbstractOperatingSystem
        Backup OS-specific query to determine bitness if previous checks fail
        Specified by:
        queryBitness in class AbstractOperatingSystem
        Parameters:
        jvmBitness - The bitness of the JVM
        Returns:
        The operating system bitness

      • getSessions

        public java.util.List<OSSession> getSessions()
        Description copied from interface: OperatingSystem
        Gets currently logged in users.

        On macOS, Linux, and Unix systems, the default implementation uses native code (see man getutxent) that is not thread safe. OSHI's use of this code is synchronized and may be used in a multi-threaded environment without introducing any additional conflicts. Users should note, however, that other operating system code may access the same native code.

        The Who.queryWho() method produces similar output parsing the output of the Posix-standard who command, and may internally employ reentrant code on some platforms. Users may opt to use this command-line variant by default using the oshi.os.unix.whoCommand configuration property.

        Returns:
        A list of OSSession objects representing logged-in users

      • getProcess

        public OSProcess getProcess​(int pid)
        Description copied from interface: OperatingSystem
        Gets information on a currently running process
        Parameters:
        pid - A process ID
        Returns:
        An OSProcess object for the specified process id if it is running; null otherwise

      • getProcessListFromPS

        private java.util.List<OSProcess> getProcessListFromPS​(int pid)

      • getProcessId

        public int getProcessId()
        Description copied from interface: OperatingSystem
        Gets the current process ID (PID).
        Returns:
        the Process ID of the current process

      • getProcessCount

        public int getProcessCount()
        Description copied from interface: OperatingSystem
        Get the number of processes currently running
        Returns:
        The number of processes running

      • getThreadId

        public int getThreadId()
        Description copied from interface: OperatingSystem
        Makes a best effort to get the current thread ID (TID). May not be useful in a multithreaded environment. The thread ID returned may have been short lived and no longer exist.

        Thread IDs on macOS are not correlated with any other Operating System output.

        Returns:
        the Thread ID of the current thread if known, 0 otherwise.

      • getCurrentThread

        public OSThread getCurrentThread()
        Description copied from interface: OperatingSystem
        Makes a best effort to get the current thread. May not be useful in a multithreaded environment. The thread returned may have been short lived and no longer exist.

        On macOS, returns the oldest thread in the calling process.

        Returns:
        the current thread if known; an invalid thread otherwise.

      • getThreadCount

        public int getThreadCount()
        Description copied from interface: OperatingSystem
        Get the number of threads currently running
        Returns:
        The number of threads running

      • getSystemUptime

        public long getSystemUptime()
        Description copied from interface: OperatingSystem
        Get the System up time (time since boot).
        Returns:
        Number of seconds since boot.

      • getSystemBootTime

        public long getSystemBootTime()
        Description copied from interface: OperatingSystem
        Get Unix time of boot.
        Returns:
        The approximate time at which the system booted, in seconds since the Unix epoch.

      • querySystemBootTime

        private static long querySystemBootTime()

      • getServices

        public java.util.List<OSService> getServices()
        Description copied from interface: OperatingSystem
        Gets the all services on the system. The definition of what is a service is platform-dependent.
        Returns:
        An array of OSService objects