001: /*
002: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: *
023: * Free Software Foundation, Inc.
024: * 59 Temple Place, Suite 330
025: * Boston, MA 02111-1307 USA
026: *
027: * @author Emil Ong
028: */
029:
030: package com.caucho.quercus.lib.file;
031:
032: import com.caucho.quercus.env.Env;
033: import com.caucho.quercus.env.EnvCleanup;
034: import com.caucho.vfs.ReadStream;
035: import com.caucho.vfs.VfsStream;
036:
037: import java.io.IOException;
038: import java.util.logging.Logger;
039:
040: /**
041: * Represents an input stream for a popen'ed process.
042: */
043: public class PopenInput extends ReadStreamInput implements EnvCleanup {
044: private static final Logger log = Logger.getLogger(FileInput.class
045: .getName());
046:
047: private Env _env;
048: private Process _process;
049:
050: public PopenInput(Env env, Process process) throws IOException {
051: super (env);
052:
053: _env = env;
054:
055: _env.addCleanup(this );
056:
057: _process = process;
058:
059: init(new ReadStream(new VfsStream(_process.getInputStream(),
060: null)));
061:
062: _process.getOutputStream().close();
063: }
064:
065: /**
066: * Opens a copy.
067: */
068: public BinaryInput openCopy() throws IOException {
069: return new PopenInput(_env, _process);
070: }
071:
072: /**
073: * Returns the number of bytes available to be read, 0 if no known.
074: */
075: public long getLength() {
076: return 0;
077: }
078:
079: /**
080: * Converts to a string.
081: */
082: public String toString() {
083: return "PopenInput[" + _process + "]";
084: }
085:
086: public int pclose() {
087: super .close();
088:
089: try {
090: return _process.waitFor();
091: } catch (Exception e) {
092: return -1;
093: } finally {
094: _env.removeCleanup(this );
095: }
096: }
097:
098: public void close() {
099: pclose();
100: }
101:
102: /**
103: * Implements the EnvCleanup interface.
104: */
105:
106: public void cleanup() {
107: pclose();
108: }
109:
110: }
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