994 * denies write access to the file
995 *
996 * </ul>
997 *
998 * @throws IOException if an I/O error occurs
999 *
1000 * @see Runtime#exec(String[], String[], java.io.File)
1001 */
1002 public Process start() throws IOException {
1003 // Must convert to array first -- a malicious user-supplied
1004 // list might try to circumvent the security check.
1005 String[] cmdarray = command.toArray(new String[command.size()]);
1006 cmdarray = cmdarray.clone();
1007
1008 for (String arg : cmdarray)
1009 if (arg == null)
1010 throw new NullPointerException();
1011 // Throws IndexOutOfBoundsException if command is empty
1012 String prog = cmdarray[0];
1013
1014 SecurityManager security = System.getSecurityManager();
1015 if (security != null)
1016 security.checkExec(prog);
1017
1018 String dir = directory == null ? null : directory.toString();
1019
1020 try {
1021 return ProcessImpl.start(cmdarray,
1022 environment,
1023 dir,
1024 redirects,
1025 redirectErrorStream);
1026 } catch (IOException e) {
1027 // It's much easier for us to create a high-quality error
1028 // message than the low-level C code which found the problem.
1029 throw new IOException(
1030 "Cannot run program \"" + prog + "\""
1031 + (dir == null ? "" : " (in directory \"" + dir + "\")")
1032 + ": " + e.getMessage(),
1033 e);
1034 }
1035 }
1036 }
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994 * denies write access to the file
995 *
996 * </ul>
997 *
998 * @throws IOException if an I/O error occurs
999 *
1000 * @see Runtime#exec(String[], String[], java.io.File)
1001 */
1002 public Process start() throws IOException {
1003 // Must convert to array first -- a malicious user-supplied
1004 // list might try to circumvent the security check.
1005 String[] cmdarray = command.toArray(new String[command.size()]);
1006 cmdarray = cmdarray.clone();
1007
1008 for (String arg : cmdarray)
1009 if (arg == null)
1010 throw new NullPointerException();
1011 // Throws IndexOutOfBoundsException if command is empty
1012 String prog = cmdarray[0];
1013
1014 String dir = directory == null ? null : directory.toString();
1015
1016 return ProcessImpl.start(cmdarray,
1017 environment,
1018 dir,
1019 redirects,
1020 redirectErrorStream);
1021 }
1022 }
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