** The following command works fine when run directly on terminal
mysqldump -uabc -pabc1234 --compact --no-create-info -w \"fieldname != 'A'\" dbname tablename -hhostaddress --result-file=/tmp/myfile.txt
** But when it is executed using Runtime() method then it does not produce the output in the destination file.
String s="mysqldump -uabc -pabc1234 --compact --no-create-info -w \"fieldname != 'A'\" dbname tablename -hhostaddress --result-file=/tmp/myfile.txt";
Runtime.getRuntime().exec(s);
(** say abc is the username and abc1234 the password)
The same problem occurs if redirection to the destination file ( > ) is usedinstead of --result-file option.
What shall i do to execute it from within a java program ?
for unachiveing file I used
final Runtime r = Runtime.getRuntime();
final Process p = r.exec("/bin/tar -xvf " + zipFile, null, fileDir);
where zipFile - target filename,
fileDir - current dir path (where need to put files)
Also I used "/bin/tar" because direct "tar" was hidden from Runtime.exec environment. Try to use direct path too (just for test).
for logs just add next at the end
final int returnCode = p.waitFor();
if (logger.isDebugEnabled()) {
final BufferedReader is = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while ((line = is.readLine()) != null) {
logger.debug(line);
}
final BufferedReader is2 = new BufferedReader(new InputStreamReader(p.getErrorStream()));
while ((line = is2.readLine()) != null) {
logger.debug(line);
}
}
Use ProcessBuilder api which handles whitespaces better. Output will be in result file.
new ProcessBuilder( "mysqldump" , "-uabc", "-pabc1234", ... ).start();
'>' is Shell indirection- It works if your program is shell.
new ProcessBuilder( "bash", -"c "mysqldump" , "-uabc", "-pabc1234", ..., "> fileresult" ).start();
Related
I am able to open some program, that can get instructions from cmd to do some stuff, like opening file with certain arguments, check if it's ready, etc...
That's how I open file through Java.
final String location = "C:\\Program";
final File dir = new File(location);
String cmd = "cmd.exe /c start my-program.exe";
Process process = Runtime.getRuntime().exec(cmd, null , dir);
How do I interact with it now, send commands like "check_status" or "do_some_stuff" and get it's output to Java.
If I try this:
String [] cmd = {"cmd.exe /c start my-program.exe", "do_stuff"};
Process process = Runtime.getRuntime().exec(cmd, null , dir);
I get error: "Cannot run program "cmd.exe /c start my-program.exe.exe" (in directory "C:\Program"): CreateProcess error=2, The system cannot find the file specified"
But it does finds file when I send single String as an argument.
I understand that I can get it's output to Java this way:
java.io.InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
EDIT: Solved by using getOutputStream.
Writer w = new OutputStreamWriter(process.getOutputStream());
w.write("custom_command");
w.close();
I started Wildfly server with standalone.bat file(similar .exe file)
public static void main(String[] args) throws IOException {
ProcessBuilder processBuilder = new ProcessBuilder("cmd.exe", "/c", "cd D:\\Users\\turack\\Downloads\\wildfly-16.0.0.Final\\bin\\ && standalone.bat");
processBuilder.redirectErrorStream(true);
Process process = processBuilder.start();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
while (true) {
line = bufferedReader.readLine();
if (line == null) { break; }
System.out.println(line);
}
bufferedReader.close();
}
Solved by using getOutputStream.
Writer w = new OutputStreamWriter(process.getOutputStream());
w.write("custom_command");
w.close();
I am writing a java server process that in addition should run vb.exe file with parameters in windows only.
I tried to use ProcessBuilder with start function and Process with exec function but I have no error but nothing happens!
the cmd for example:
"C:\AL500\BIAFLABEL\AddToQueue.exe" "C:\AL500\BiafLabel\Templates\2.xml" -printer \\mickaelbpc\System-N
the command line definitions in the code:
String fullcmd = "\"C:\\AL500\\BIAFLABEL\\AddToQueue.exe\" \"C:\\AL500\\BiafLabel\\Templates\\2.xml\" -printer \\\\mickaelbpc\\System-N";
String fullcmd1 = "C:\\AL500\\BIAFLABEL\\AddToQueue.exe C:\\AL500\\BiafLabel\\Templates\\2.xml -printer \\\\mickaelbpc\\System-N";
String cmd1 = "C:\\AL500\\BIAFLABEL\\AddToQueue.exe";
String cmd2 = "C:\\AL500\\BiafLabel\\Templates\\2.xml";
String cmd3 = "-printer";
String cmd4 = "\\\\mickaelbpc\\System-N";
String[] command = new String[]{cmd1, cmd2, cmd3,cmd4};
Process + array:
File dir = new File("C:/workspace");
Process process = Runtime.getRuntime().exec(command, null, dir);
process.waitFor();
InputStream stdout = process.getInputStream();
InputStream stderr = process.getErrorStream();
String strData;
StringBuffer sb = new StringBuffer("");
BufferedReader brData = new BufferedReader(new
InputStreamReader(stdout));
while ((strData = brData.readLine()) != null)
{
sb = sb.append(strData).append("\r\n");
}
brData.close();
ProcessBuilder + string command with ":
ProcessBuilder pb=new ProcessBuilder(fullcmd);
pb.redirectErrorStream(true);
Process process1=pb.start();
BufferedReader inStreamReader = new BufferedReader(
new InputStreamReader(process1.getInputStream()));
String line;
while (true) {
line = inStreamReader.readLine();
if (line == null) { break; }
System.out.println(line);
ProcessBuilder + string command with no ":
File log = new File("log");
ProcessBuilder pb=new ProcessBuilder(/*command*/fullcmd1);
pb.redirectErrorStream(true);
pb.redirectOutput(Redirect.appendTo(log));
Process process1=pb.start();
BufferedReader inStreamReader = new BufferedReader(
new InputStreamReader(process1.getInputStream()));
String line;
while (true) {
line = inStreamReader.readLine();
if (line == null) { break; }
System.out.println(line);
}
after the changes I am getting this error: "java.io.IOException: Cannot run program "C:\AL500\BIAFLABEL\AddToQueue.exe C:\AL500\BiafLabel\Templates\2.xml -printer \mickaelbpc\System-N": CreateProcess error=2, The system cannot find the file specified" can you please advise?
ProcessBuilder with cmd.exe:
ProcessBuilder pb=new ProcessBuilder("cmd.exe","/c",fullcmd);
pb.redirectErrorStream(true);
Process process1=pb.start();
BufferedReader inStreamReader = new BufferedReader(
new InputStreamReader(process1.getInputStream()));
String line;
while (true) {
line = inStreamReader.readLine();
if (line == null) { break; }
System.out.println(line);
}
I did all the options and more...if it will be necessary I will add more examples
the vb exe should print a file. any idea how to run it from java process? or what is wrong with my code?
Study the error and output stream of the command. Need to redirect them and stream them in a separate thread. Or try this fronm
File log = new File("log");
pb.redirectErrorStream(true);
pb.redirectOutput(Redirect.appendTo(log));
Is the full path correct? Can you print the commad line space seperated to a file called run.cmd and run that manually and see what happens from prompt?
which directory are you starting the process from might have to be different than the one that your java program is running at? Process builder has a https://docs.oracle.com/javase/7/docs/api/java/lang/ProcessBuilder.html#directory()
To know which directory your java program is using do this:
File f = new File("./");
try{
System.out.println("Start dir is :" + f.getCanonicalFile());
}catch...
https://docs.oracle.com/javase/7/docs/api/java/io/File.html#getCanonicalFile()
i do not think you do not need to add quotes, just set them in the array with actual values. but if running from a .cmd you will need to qualify params with spaces by putting quotes. best to have no spaces in the paths or params when testing.
See github.com/tgkprog/nli/blob/master/RunCmd.java if ur redirecting to log, dont get the stream again in your loop. and dont call via cmd.exe. in my example ignore the actual commmand, put ur exe and params, i just called a sh file as on ubuntu. You call with your 4 params
Im trying to run python script via terminal but it always throws an exception: No such file or directory
StringBuffer output = new StringBuffer();
String command = "python3 Users/lounah/Documents/programming/ApplicationName/scriptName.py " + params.toString();
ProcessBuilder processBuilder = new ProcessBuilder(command);
Process process = processBuilder.start();
BufferedReader reader =
new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
while ((line = reader.readLine())!= null) {
output.append(line + "\n");
}
When you pass a string in ProcessBuilder it tries to run a program located in that path.
Instaed you should use a String[] with the path of your executable ( '/python3/python.exe' or 'python' or 'py') followed by the path of your script, followed by the arguments.
String[] command = {
"python3",
"Users/lounah/Documents/programming/ApplicationName/scriptName.py",
params.toString()
};
ProcessBuilder processBuilder = new ProcessBuilder(command);
I can execute Linux commands like ls or pwd from Java without problems but couldn't get a Python script executed.
This is my code:
Process p;
try{
System.out.println("SEND");
String cmd = "/bash/bin -c echo password| python script.py '" + packet.toString() + "'";
//System.out.println(cmd);
p = Runtime.getRuntime().exec(cmd);
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String s = br.readLine();
System.out.println(s);
System.out.println("Sent");
p.waitFor();
p.destroy();
} catch (Exception e) {}
Nothing happened. It reached SEND but it just stopped after it...
I am trying to execute a script which needs root permissions because it uses serial port. Also, I have to pass a string with some parameters (packet).
You cannot use the PIPE inside the Runtime.getRuntime().exec() as you do in your example. PIPE is part of the shell.
You could do either
Put your command to a shell script and execute that shell script with .exec() or
You can do something similar to the following
String[] cmd = {
"/bin/bash",
"-c",
"echo password | python script.py '" + packet.toString() + "'"
};
Runtime.getRuntime().exec(cmd);
#Alper's answer should work. Better yet, though, don't use a shell script and redirection at all. You can write the password directly to the process' stdin using the (confusingly named) Process.getOutputStream().
Process p = Runtime.exec(
new String[]{"python", "script.py", packet.toString()});
BufferedWriter writer = new BufferedWriter(
new OutputStreamWriter(p.getOutputStream()));
writer.write("password");
writer.newLine();
writer.close();
You would do worse than to try embedding jython and executing your script. A simple example should help:
ScriptEngine engine = new ScriptEngineManager().getEngineByName("python");
// Using the eval() method on the engine causes a direct
// interpretataion and execution of the code string passed into it
engine.eval("import sys");
engine.eval("print sys");
If you need further help, leave a comment. This does not create an additional process.
First, open terminal and type "which python3". You will get the complete path of python3. For example "/usr/local/bin/python3"
String[] cmd = {"/usr/local/bin/python3", "arg1", "arg2"};
Process p = Runtime.getRuntime().exec(cmd);
p.waitFor();
String line = "", output = "";
StringBuilder sb = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((line = br.readLine())!= null) {sb = sb.append(line).append("\n"); }
output = sb.toString();
System.out.println(output);
I can execute Linux commands like ls or pwd from Java without problems but couldn't get a Python script executed.
This is my code:
Process p;
try{
System.out.println("SEND");
String cmd = "/bash/bin -c echo password| python script.py '" + packet.toString() + "'";
//System.out.println(cmd);
p = Runtime.getRuntime().exec(cmd);
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String s = br.readLine();
System.out.println(s);
System.out.println("Sent");
p.waitFor();
p.destroy();
} catch (Exception e) {}
Nothing happened. It reached SEND but it just stopped after it...
I am trying to execute a script which needs root permissions because it uses serial port. Also, I have to pass a string with some parameters (packet).
You cannot use the PIPE inside the Runtime.getRuntime().exec() as you do in your example. PIPE is part of the shell.
You could do either
Put your command to a shell script and execute that shell script with .exec() or
You can do something similar to the following
String[] cmd = {
"/bin/bash",
"-c",
"echo password | python script.py '" + packet.toString() + "'"
};
Runtime.getRuntime().exec(cmd);
#Alper's answer should work. Better yet, though, don't use a shell script and redirection at all. You can write the password directly to the process' stdin using the (confusingly named) Process.getOutputStream().
Process p = Runtime.exec(
new String[]{"python", "script.py", packet.toString()});
BufferedWriter writer = new BufferedWriter(
new OutputStreamWriter(p.getOutputStream()));
writer.write("password");
writer.newLine();
writer.close();
You would do worse than to try embedding jython and executing your script. A simple example should help:
ScriptEngine engine = new ScriptEngineManager().getEngineByName("python");
// Using the eval() method on the engine causes a direct
// interpretataion and execution of the code string passed into it
engine.eval("import sys");
engine.eval("print sys");
If you need further help, leave a comment. This does not create an additional process.
First, open terminal and type "which python3". You will get the complete path of python3. For example "/usr/local/bin/python3"
String[] cmd = {"/usr/local/bin/python3", "arg1", "arg2"};
Process p = Runtime.getRuntime().exec(cmd);
p.waitFor();
String line = "", output = "";
StringBuilder sb = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((line = br.readLine())!= null) {sb = sb.append(line).append("\n"); }
output = sb.toString();
System.out.println(output);