Shell command not executing in Java -

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• shell command execution failing when executed java 1 answer

normally when this:

printf 'select x y \ngo\n' | isql -uxx -pxxxxxx -dxxxxx -w 65535 -s ',' 

on command line executes fine.

even below java code. works fine

public class test {  public static void main(string[] args)  {    string db="|isql -uxx -pxxxxxx -dxxxxx -w 65535 -s ','";    string qpfx="printf \'";    string qsfx=" \ngo\n\'";    if(args[0]!=null)         try {             string cmd=qpfx+args[0]+qsfx+db;             system.out.println("argument query is:"+args[0]);             system.out.println("command is:"+cmd);              process p = runtime.getruntime().exec(new string[]{"sh","-c",cmd});              p.waitfor();             bufferedreader reader = new bufferedreader(new inputstreamreader(p.getinputstream()));             string line=reader.readline();              while (line != null) {                     system.out.println(line);                 line = reader.readline();             }          }         catch(ioexception e1) {}         catch(interruptedexception e2) {}   } } 

i run above java code below:

java test "select x y" 

probelm comes when give select query "select * y" instead of column names. when wanted execute below:

java test "select * y" 

the above jav code hangs.can body tell me reason why?

below output hanging:

> java test "select * y" argument query is:select * y command is:printf 'select * y go '|isql -uxx -pxxxxx -dxxxxxx -w 65535 -s ',' 

i tried:

java test "select \* y" 

but not execute.

after severe debugging found line hanging p.waitfor();.

i had read this complete article , found solution. have shifted p.waitfor(); after while loop in code , worked.