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POin Java, why can't i pass an invocation string longer than 94 chars to Runtime.getRuntime().exec()?
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  1. POin Java, why can't i pass an invocation string longer than 94 chars to Runtime.getRuntime().exec()?
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    copied!<p>I'm trying to invoke a .bat file from a java app. Seems simple, yet I'm having 2 problems and would really appreciate some advice: </p> <ol> <li><p>The code below fails to execute the bat file because the argument string is longer than 94 chars. if i use exactly 94 chars (by removing the trailing 'x' from the end of the <code>clientArgs</code> string) the bat file executes ok.<br> (same problem if i use the alternative invocation and pass the args as <code>String[]</code>)<br> anyway, i need to be able to pass much longer command strings (~150 chars)</p></li> <li><p>If I modify the <code>clientArgs</code> to not include the full file name but only the short name (since I'm specifying the working directory) I get: </p> <p><code>java.io.IOException: Cannot run program "client.bat" (in directory "C:\2\code\FlaFl\flafl-0.7-RC2"): CreateProcess error=2, The system cannot find the file specified</code></p></li> </ol> <p>here's the code: </p> <pre><code>public static void main(String[] args) { String CMD_FILE_NAME = "client.bat"; //cmd or bat - still limit'n is 94 chars String cmdFileFolder= "C:/2/code/FlaFl/flafl-0.7-RC2/"; File workingDir = new File(cmdFileFolder); String clientArgs = cmdFileFolder + CMD_FILE_NAME + " -host name12.mycompanyname3.com -app hive" + "123456789 34x"; //95 chars fails. remove the x to get it to work System.out.println("length of invoc str is "+clientArgs.length()); Process process=null; try { process = Runtime.getRuntime().exec(clientArgs,null,workingDir); } catch (IOException e) { System.out.println("exception "+e); } //sleep(2000); //if (process!=null) // process.destroy(); } </code></pre>
 

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