Returns a string description of the last error reported by a system call

Returns:String

a String describing the error

Obtains the single instance of LinuxSystem. loadLibrary() must be called on the LinuxSystem instance before any system calls can be made using it.

Loads native libraries required to make system calls using LinuxSystem methods. This method must be called before any other instance methods of LinuxSystem. If this method is called multiple times, it has no effect after the first call.

Calls the "read" function defined in unistd.h. The parameters have the same meaning as in the "read" C system call, except that a ByteBuffer with a position and limit are used for the data sink. The position and limit set on the ByteBuffer are ignored; the position and limit provided as method parameters are used instead.

Parameters

fd:long

The file descriptor from which to read

buf:ByteBuffer

The buffer to which to write

position:int

The index in buf to which to being reading data

limit:int

The index in buf up to which to read data

Returns:long

The number of bytes read, or -1 on failure

Calls the "sysconf" function defined in unistd.h

Parameters

name:int

The name of the POSIX variable to query

Returns:long

The value of the system resource, or -1 if name is invalid

Calls the "write" function defined in unistd.h. The parameters have the same meaning as in the "write" C system call, except that a ByteBuffer with a position and limit are used for the source data. The position and limit set on the ByteBuffer are ignored; the position and limit provided as method parameters are used instead.

Parameters

fd:long

The file descriptor to which to write

buf:ByteBuffer

The buffer from which to write

position:int

The index in buf of the first byte to write

limit:int

The index in buf up to which to write

Returns:long

The number of bytes written, or -1 on failure