com.github.bloodshura.ignitium.ntv.lib.Unix Maven / Gradle / Ivy

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An API for working with native system APIs, with a higher-level interface.

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package com.github.bloodshura.ignitium.ntv.lib;

import com.sun.jna.LastErrorException;
import com.sun.jna.Native;
import com.sun.jna.NativeLibrary;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.List;

public final class Unix {
	static {
		Native.register(NativeLibrary.getInstance("c"));
	}

	private Unix() {
	}

	public static native int getpid();

	public static native int getuid();

	public static native long mrand48();

	public static native long process_vm_readv(int pid, iovec local, long liovcnt, iovec remote, long riovcnt, long flags) throws LastErrorException;

	public static native long process_vm_writev(int pid, iovec local, long liovcnt, iovec remote, long riovcnt, long flags) throws LastErrorException;

	public static native void srand48(long seedval);

	public static class iovec extends Structure {
		public static final List FIELDS = createFieldsOrder("iov_base", "iov_len");

		public Pointer iov_base;
		public int iov_len;

		@Override
		protected List getFieldOrder() {
			return FIELDS;
		}
	}

	public static class Shm {
		static {
			Native.register(NativeLibrary.getInstance("c"));
		}

		@Nonnull
		public static native Pointer shmat(int shmid, @Nullable Pointer shmaddr, int shmflg);

		public static native int shmctl(int shmid, int cmd, @Nullable Pointer bufStructure);

		public static native int shmdt(@Nonnull Pointer shmaddr);

		public static native int shmget(int key, /* size_t */ int size, int shmflg);
	}
}