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2 package com.trilead.ssh2;
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3
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4 /**
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5 * Contains constants that can be used to specify what conditions to wait for on
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6 * a SSH-2 channel (e.g., represented by a {@link Session}).
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7 *
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8 * @see Session#waitForCondition(int, long)
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9 *
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10 * @author Christian Plattner, plattner@trilead.com
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11 * @version $Id: ChannelCondition.java,v 1.1 2007/10/15 12:49:56 cplattne Exp $
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12 */
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13
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14 public abstract interface ChannelCondition {
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15 /**
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16 * A timeout has occurred, none of your requested conditions is fulfilled.
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17 * However, other conditions may be true - therefore, NEVER use the "=="
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18 * operator to test for this (or any other) condition. Always use
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19 * something like <code>((cond & ChannelCondition.CLOSED) != 0)</code>.
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20 */
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21 public static final int TIMEOUT = 1;
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22
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23 /**
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24 * The underlying SSH-2 channel, however not necessarily the whole connection,
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25 * has been closed. This implies <code>EOF</code>. Note that there may still
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26 * be unread stdout or stderr data in the local window, i.e, <code>STDOUT_DATA</code>
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27 * or/and <code>STDERR_DATA</code> may be set at the same time.
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28 */
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29 public static final int CLOSED = 2;
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30
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31 /**
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32 * There is stdout data available that is ready to be consumed.
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33 */
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34 public static final int STDOUT_DATA = 4;
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35
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36 /**
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37 * There is stderr data available that is ready to be consumed.
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38 */
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39 public static final int STDERR_DATA = 8;
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40
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41 /**
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42 * EOF on has been reached, no more _new_ stdout or stderr data will arrive
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43 * from the remote server. However, there may be unread stdout or stderr
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44 * data, i.e, <code>STDOUT_DATA</code> or/and <code>STDERR_DATA</code>
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45 * may be set at the same time.
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46 */
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47 public static final int EOF = 16;
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48
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49 /**
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50 * The exit status of the remote process is available.
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51 * Some servers never send the exist status, or occasionally "forget" to do so.
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52 */
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53 public static final int EXIT_STATUS = 32;
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54
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55 /**
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56 * The exit signal of the remote process is available.
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57 */
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58 public static final int EXIT_SIGNAL = 64;
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59
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60 }
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