Examples with ErrnoException libcore.io.ErrnoException used on opensource projects

Example 21 with ErrnoException

use of libcore.io.ErrnoException in project XobotOS by xamarin.

the class FileChannelImpl method basicLock.

private FileLock basicLock(long position, long size, boolean shared, boolean wait) throws IOException {
    int accessMode = (mode & O_ACCMODE);
    if (accessMode == O_RDONLY) {
        if (!shared) {
            throw new NonWritableChannelException();
        }
    } else if (accessMode == O_WRONLY) {
        if (shared) {
            throw new NonReadableChannelException();
        }
    }
    if (position < 0 || size < 0) {
        throw new IllegalArgumentException("position=" + position + " size=" + size);
    }
    FileLock pendingLock = new FileLockImpl(this, position, size, shared);
    addLock(pendingLock);
    StructFlock flock = new StructFlock();
    flock.l_type = (short) (shared ? F_RDLCK : F_WRLCK);
    flock.l_whence = (short) SEEK_SET;
    flock.l_start = position;
    flock.l_len = translateLockLength(size);
    boolean success = false;
    try {
        success = (Libcore.os.fcntlFlock(fd, wait ? F_SETLKW64 : F_SETLK64, flock) != -1);
    } catch (ErrnoException errnoException) {
        throw errnoException.rethrowAsIOException();
    } finally {
        if (!success) {
            removeLock(pendingLock);
        }
    }
    return success ? pendingLock : null;
}

Example 22 with ErrnoException

use of libcore.io.ErrnoException in project XobotOS by xamarin.

the class InetAddress method isReachable.

private boolean isReachable(InetAddress destination, InetAddress source, int timeout) throws IOException {
    // TODO: try ICMP first (http://code.google.com/p/android/issues/detail?id=20106)
    FileDescriptor fd = IoBridge.socket(true);
    boolean reached = false;
    try {
        if (source != null) {
            IoBridge.bind(fd, source, 0);
        }
        IoBridge.connect(fd, destination, 7, timeout);
        reached = true;
    } catch (IOException e) {
        if (e.getCause() instanceof ErrnoException) {
            // "Connection refused" means the IP address was reachable.
            reached = (((ErrnoException) e.getCause()).errno == ECONNREFUSED);
        }
    }
    IoBridge.closeSocket(fd);
    return reached;
}

Example 23 with ErrnoException

use of libcore.io.ErrnoException in project j2objc by google.

the class FileChannelImpl method release.

/**
     * Non-API method to release a given lock on a file channel. Assumes that
     * the lock will mark itself invalid after successful unlocking.
     */
public void release(FileLock lock) throws IOException {
    checkOpen();
    StructFlock flock = new StructFlock();
    flock.l_type = (short) F_UNLCK;
    flock.l_whence = (short) SEEK_SET;
    flock.l_start = lock.position();
    flock.l_len = translateLockLength(lock.size());
    try {
        Libcore.os.fcntlFlock(fd, F_SETLKW64, flock);
    } catch (ErrnoException errnoException) {
        throw errnoException.rethrowAsIOException();
    }
    removeLock(lock);
}

Example 24 with ErrnoException

use of libcore.io.ErrnoException in project j2objc by google.

the class SocketChannelImpl method onBind.

/**
     * Initialise the isBound, localAddress and localPort state from the file descriptor. Used when
     * some or all of the bound state has been left to the OS to decide, or when the Socket handled
     * bind() or connect().
     *
     * @param updateSocketState
     *      if the associated socket (if present) needs to be updated
     * @hide package visible for other nio classes
     */
void onBind(boolean updateSocketState) {
    SocketAddress sa;
    try {
        sa = NetworkOs.getsockname(fd);
    } catch (ErrnoException errnoException) {
        throw new AssertionError(errnoException);
    }
    isBound = true;
    InetSocketAddress localSocketAddress = (InetSocketAddress) sa;
    localAddress = localSocketAddress.getAddress();
    localPort = localSocketAddress.getPort();
    if (updateSocketState && socket != null) {
        socket.onBind(localAddress, localPort);
    }
}

Example 25 with ErrnoException

use of libcore.io.ErrnoException in project j2objc by google.

the class InetAddress method lookupHostByName.

/**
     * Resolves a hostname to its IP addresses using a cache.
     *
     * @param host the hostname to resolve.
     * @return the IP addresses of the host.
     */
private static InetAddress[] lookupHostByName(String host) throws UnknownHostException {
    BlockGuard.getThreadPolicy().onNetwork();
    // Do we have a result cached?
    Object cachedResult = addressCache.get(host);
    if (cachedResult != null) {
        if (cachedResult instanceof InetAddress[]) {
            // A cached positive result.
            return (InetAddress[]) cachedResult;
        } else {
            // A cached negative result.
            throw new UnknownHostException((String) cachedResult);
        }
    }
    try {
        StructAddrinfo hints = new StructAddrinfo();
        hints.ai_flags = AI_ADDRCONFIG;
        hints.ai_family = AF_UNSPEC;
        // If we don't specify a socket type, every address will appear twice, once
        // for SOCK_STREAM and one for SOCK_DGRAM. Since we do not return the family
        // anyway, just pick one.
        hints.ai_socktype = SOCK_STREAM;
        InetAddress[] addresses = NetworkOs.getaddrinfo(host, hints);
        // TODO: should getaddrinfo set the hostname of the InetAddresses it returns?
        for (InetAddress address : addresses) {
            address.hostName = host;
        }
        addressCache.put(host, addresses);
        return addresses;
    } catch (GaiException gaiException) {
        // http://code.google.com/p/android/issues/detail?id=15722
        if (gaiException.getCause() instanceof ErrnoException) {
            if (((ErrnoException) gaiException.getCause()).errno == EACCES) {
                throw new SecurityException("Permission denied (missing INTERNET permission?)", gaiException);
            }
        }
        // Otherwise, throw an UnknownHostException.
        String detailMessage = "Unable to resolve host \"" + host + "\": " + NetworkOs.gai_strerror(gaiException.error);
        addressCache.putUnknownHost(host, detailMessage);
        throw gaiException.rethrowAsUnknownHostException(detailMessage);
    }
}