Develop Reference

How to execute cmd line of psexec and log to text file in a single line using JAVA?

I am trying to execute the following line in java(with escaped characters):
"psexec -i -d \\\\computerName -u user -p pass calc 2>
somePath\\psexecOut.txt"
I use the following method to execute cmd lines:
private static String executeCommand(String command) {
StringBuffer output = new StringBuffer();
System.out.println("command is = \n"+command);
Process p;
try {
p = Runtime.getRuntime().exec(command);
p.waitFor();
BufferedReader reader =
new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = "";
while ((line = reader.readLine())!= null) {
output.append(line + "\n");
}
} catch (Exception e) {
e.printStackTrace();
}
return output.toString();
}
The line is executed and calc is starting , but the log part doesn't work. The log file psexecOut.txt is not created.
When I run the command normally (without excaped characters) in cmd it runs fine and the log file is created, but using java it doesn't create the log file.
I suspect that > needs to be escaped but as I read it's already escaped as it is.
How can I execute the psexec with log to text file in a single cmd line using java like I can do manually in windows console ?

Solved:
As lit suggested in the comments: cmd.exe /c works.
So the corrected method is:
private static String executeCommand(String command) {
StringBuffer output = new StringBuffer();
System.out.println("command is = \n"+command);
Process p;
try {
p = Runtime.getRuntime().exec("cmd.exe /c "+command); // <-correction done here
p.waitFor();
BufferedReader reader =
new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = "";
while ((line = reader.readLine())!= null) {
output.append(line + "\n");
}
} catch (Exception e) {
e.printStackTrace();
}
return output.toString();
}

Try putting cmd.exe /C at the beginning of the command? It is cmd.exe that interprets the > redirection.
"cmd.exe /C psexec -i -d \\\\computerName -u user -p pass calc 2> somePath\\psexecOut.txt"

Run bat file from different disk with java

Im trying to run a bat from C:/abc/def/coolBat.bat but my java workspace is in D:/
I've tried with :
String cmd = "cmd /c /start C:/abc/def/coolBat.bat";
Runtime.getRuntime().exec(cmd);
But didn't work, so I tried this
String[] command = { "cmd.exe", "/C", "C:/abc/def/coolBat.bat" };
Runtime.getRuntime().exec(cmd);
didnt work either. Tried this too
Executor exec = new DefaultExecutor();
exec.setWorkingDirectory(new File("C:/abc/def"));
CommandLine cl = new CommandLine("coolBat.bat");
int exitvalue = exec.execute(cl);
Says it cant find the file.
Tried something like this too:
Runtime.getRuntime().exec("cmd cd /d C:/abc/def/ && coolBat.bat");
And nothing. The weird thing is that this command:
cd /d C:/abc/def/ && coolBat.bat
Works when i do it in cmd. Its worth saying that the bat file copies some files to another directory, all inside C:/
EDITED N°1
CD C:\abc\def\MN
copy almn + ctmn + bamn C:\abc\def\mn_sf.txt
CD C:\abc\def\ME
copy alme + ctme + bame C:\abc\def\me_sf.txt
CD C:\abc\def\
if exist MN.txt del MN.txt
if exist ME.txt del ME.txt
if exist JUZ.txt del JUZ.txt
if exist FUNC.txt del FUNC.txt
if exist AHO.txt del AHO.txt
CD C:\

Allow MS Windows to use the associated application to run your batch file (or any other application):
Required Imports:
import java.awt.Desktop;
Here is code you can try:
String filePath = "C:/abc/def/coolBat.bat";
if (Desktop.isDesktopSupported()) {
try {
File myFile = new File(filePath);
Desktop.getDesktop().open(myFile);
}
catch (IOException | IllegalArgumentException ex) {
System.err.println("Either there is no application found "
+ "which is associatd with\nthe file you want to work with or the "
+ "file doesn't exist!\n\n" + filePath);
}
}

Well I finally got it to work, just had to change my workspace to C:/
Apparently the problem was that it couldn't change from D:/ to C:/ to execute. I ran the same commands I tried before and there was no problem.
Guess the question remains, why it couldn't change from D:/ to C:/ when running commands from Java.
Thanks to everyone for the help

The Java version could work as:
String[] command = {"cmd.exe", "/C", "Start", "/D", "c:\\abc\\def", "c:\\abc\\def\\coolBat.bat"};
Process process = Runtime.getRuntime().exec(command);
BufferedReader input = new BufferedReader(new InputStreamReader(process.getInputStream()));
while ((line = input.readLine()) != null) {
System.out.println(line);
}
input.close();
BufferedReader errReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));
while ((line = errReader.readLine()) != null) {
System.out.println(line);
}
System.out.flush();
int retCode = process.waitFor();
System.out.println("Return code: " + retCode);

Try this:
String[] command = { "cmd.exe", "/C", "C: && C:/abc/def/coolBat.bat" };

Java program not getting output from terminal

I am running my Java program from terminal and I am trying to count the number of files in a certain directory using a linux command in my code; I have managed to get output for all other commands but this one.
My command is: ls somePath/*.xml | wc -l
When I run my command in my code, it appears that it has nothing to output, yet when I run the same exact command in terminal it works just fine and actually outputs the number of xml files in that directory.
Here is my code:
private String executeTerminalCommand(String command) {
String s, lastOutput = "";
Process p;
try {
p = Runtime.getRuntime().exec(command);
BufferedReader br = new BufferedReader(
new InputStreamReader(p.getInputStream()));
System.out.println("Executing command: " + command);
while ((s = br.readLine()) != null){//it appears that it never enters this loop since I never see anything outputted
System.out.println(s);
lastOutput = s;
}
p.waitFor();
p.destroy();
} catch (Exception e) {
e.printStackTrace();
}
return lastOutput;//returns empty string ""
}
Updated code w/ output
private String executeTerminalCommand(String command) {
String s, lastOutput = "";
try {
Process p = new ProcessBuilder().command("/bin/bash", "-c", command).inheritIO().start();
//Process p = Runtime.getRuntime().exec(command);
BufferedReader br = new BufferedReader(
new InputStreamReader(p.getInputStream()));
System.out.println("Executing command: " + command);
while ((s = br.readLine()) != null){
System.out.println("OUTPUT: " + s);
lastOutput = s;
}
System.out.println("Done with command------------------------");
p.waitFor();
p.destroy();
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("LAST OUTPUT IS: " + lastOutput);
return lastOutput;
}
output:
Executing command: find my/path -empty -type f | wc -l
Done with command------------------------
1
LAST OUTPUT IS:

To execute a pipeline, you have to invoke a shell, and then run your commands inside that shell.
Process p = new ProcessBuilder().command("bash", "-c", command).start();
bash invokes a shell to execute your command and -c means commands are read from string. So, you don't have to send the command as an array in ProcessBuilder.
But if you want to use Runtime then
String[] cmd = {"bash" , "-c" , command};
Process p = Runtime.getRuntime().exec(cmd);
Note: You can check advantages of ProcessBuilder here and features here over Runtime

Java passing commands to the terminal difference

I want to talk to the program cordova in Java. In the terminal I can do this to get the version:
cordova -v
and in the terminal will return:
3.4.1-0.1.0
But if I ask Java to run cordova -v It returned Error: java.io.IOException: Cannot run program "cordova": error=2, No such file or directory.
I tried this in the terminal:
/usr/local/bin/cordova -v
and it still returned:
3.4.1-0.1.0
But when I asked Java to run /usr/local/bin/cordova -v it didn't return anything. Got a fix for my problem?
Edit
Pasted from comment
I'm calling my runShell function like
runShell("cordova -v");
private String runShell(String command) {
StringBuffer output = new StringBuffer();
Process p;
try {
p = Runtime.getRuntime().exec(command);
p.waitFor();
BufferedReader reader =
new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = "";
while ((line = reader.readLine())!= null) {
output.append(line + "\n");
}
} catch (Exception e) {
System.out.println(e); return "Error: " + e;
}
return output.toString();
}

You want
Runtime.getRuntime().exec(new String[]{ "/usr/local/bin/cordova", "-v" });
You have to pass the command and each of its arguments separately, because you're not invoking a shell to parse the command line for you.

shell Command execution Failing when executed from Java

When I execute the below command on command line, it shows all the stored procedures and tables in the sybase DB.
printf 'sp_help\ngo\n' | isql -Uxx -Pxxxx -Dxxxxx
But when I do the same thing in java. This does not return any result.
Can anyone tell me what is the problem with my code below:
public class test
{
public static void main(String[] args)
{
String cmd = "printf "+"\'sp_help\ngo\n\'"+"| isql -Uxx -Pxxxx -Dxxxxx" ;
try{
Process p;
p = Runtime.getRuntime().exec(cmd);
p.waitFor();
String line;
BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((line = reader.readLine())!=null){
System.out.println("Row is :" + line);
} catch(Exception e)
{
System.out.println("Exception Caught : " + e);
}
}
}
EDIT
I executed it as below suggested by Darkdust but still it doesnt work.
try{
Process p;
p = Runtime.getRuntime().exec("sh -c \'printf \"sp_help\ngo\n\" | isql -Uxx -Pxxxxx -Dxxxxxx\'");
p.waitFor();
String line;
BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((line = reader.readLine())!=null){
System.out.println("Row is :" + line);
}
}
catch(Exception e)
{
System.out.println("Exception Caught : " + e);
}
But the command :
sh -c 'printf "sp_help\ngo\n" | isql -Usa -Psybase11 -Dcnadb'
Works on command line.
I also tried with :
p = Runtime.getRuntime().exec(new String[]{"sh","-c","\'printf \"sp_help\ngo\n\"","|isql -Uxx -Pxxxxx -Dxxxxx\'"});
But with no sucess.

Several things come to mind:
Incomplete PATH environment variable (thus isql can't be found).
If it's a command you provide, instead of messing with PATH you might want to make sure your are you in the correct working directory and call ./isql instead.
Since you're using a pipe, you should let a shell execute this as in sh -c "foo | bar". Otherwise the | isql ... part is passed as argument to printf as well.