I want to run a script with ssh from java. The script takes a number as parameter. I launch this code :
String myKey="/home/my_key.pem";
Runtime runtime = Runtime.getRuntime();
String commande = "ssh -i "
+myKey+" ubuntu#ec2-56-75-88-183.eu-west-1.compute.amazonaws.com './runScript.bash 8000'";
Process p = runtime.exec(commande);
BufferedReader reader = new BufferedReader(new InputStreamReader(p.getErrorStream()));
String line = reader.readLine();
while (line != null) {
System.out.println(line);
line = reader.readLine();
}
p.waitFor();
I obtain this error :
bash: ./runScript.bash 8000: No such file or directory
The name of file is correct. chmod given to runScript.bash is 777.
When i run the command line directly from bash it works. But from IDE, it does not.
How can i do to run this commande line correctly please ?
The error makes it clear:
bash: ./runScript.bash 8000: No such file or directory
This indicates that the shell is trying to invoke a script called ./runScript.bash 8000 -- with the space and the 8000 in the filename of the script.
It's rare for me to be telling anyone to use fewer quotes, but, well, this is actually a case where that would fix things.
Better would be to avoid double evaluation altogether:
Runtime.exec(new String[] {
"ssh",
"-i", myKey,
"ubuntu#ec2-56-75-88-183.eu-west-1.compute.amazonaws.com",
"./runScript 8000"
})
Related
So for work I would like to automate something for minitab. We get results from our microscope and these need to be put into Minitab. Now I wanted to make a program that does some changes to the text file and then automatically opens minitab with a macro. I have everything working except for the auto opening of the macro with minitab.
I can launch it from cmd manually no problem, so it should be working.
Code can be found below, after compiling and running I get this error
'C:/Program' is not recognized as an internal or external command,
operable program or batch file.
Process finished with exit code 0
Which makes me believe cmd does something like:
cmd.exe,/c,c:/Program,Files/..
instead of
cmd.exe,/c,c:/program files/...
String PathExe = "\"C:/Program Files/Minitab/Minitab 17/Minitab 17/Mtb.exe\"";
String Macro = "\"c:/minitAPP/Import.mtb\"";
ProcessBuilder builder;
builder = new ProcessBuilder("cmd.exe", "/c", PathExe + " " + Macro);
builder.redirectErrorStream(true);
Process p = builder.start();
BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while (true) {
line = r.readLine();
if (line == null) { break; }
System.out.println(line);
There is no need to use cmd.exe to execute another .exe file. Just execute it directly, without the quotes:
ProcessBuilder builder = new ProcessBuilder(
"C:\\Program Files\\Minitab\\Minitab 17\\Minitab 17\\Mtb.exe",
"c:\\minitAPP\\Import.mtb");
By specifying an entire path as a single argument to ProcessBuilder, you ensure that the operating system will treat it as a single argument, which is the purpose of using quotations marks on a normal command line.
I've been having problems reading output of windows command line from Java, i'm using Runtime.getRuntime().exec()
I simplified my test case: I have a file called お読みください.txt, and i execute the following command cmd /c dir C:/PATH
Note: The actual command is tasklist, but it's the same result as long as i use Runtime.getRuntime().exec()
String[] cmd = new String[]{ "cmd", "/c", "dir" };
Process process = Runtime.getRuntime().exec(cmd);
BufferedReader stdInput =
new BufferedReader(new InputStreamReader(process.getInputStream(), StandardCharsets.UTF_8));
String s, result = "";
while ((s = stdInput.readLine()) != null) {
if (!s.isEmpty()) {
result += s + "\n";
}
}
System.out.println(result);
I just get ���ǂ݂�������.txt
I tried with no charset, default, and the other ones; after testing all charsets, i got the one i was looking for: Shift_JIS
And that must be because i have set Language for non-Unicode applications as Japanese. systeminfo.exe says ja;Japanese for Regional Config.
I can simply use Shift_JIS to read, but it will only work in my computer. What about other system configurations?
The question is, how can i get the correct charset to read Windows Console output?
Base on the answer of What encoding/code page is cmd.exe using?
You can execute cmd /k chcp && pause && exit to get current code page. Using Code Page Identifiers to find the mapping Java encoding name.
I am trying to run Shell script using java Application. I am using Process builder for the same.
{
String cmd;
cmd = "D:/cygwin/bin/bash -c '/bin/app.sh 121 121 1212 12121'";
System.out.println("EXECING: " + cmd);
p = Runtime.getRuntime().exec(cmd);
in = p.getInputStream();
br = new BufferedReader(new InputStreamReader(in));
System.out.println("OUT:");
while ((line = br.readLine()) != null) {
System.out.println(line);
}
in = p.getErrorStream();
br = new BufferedReader(new InputStreamReader(in));
System.out.println("ERR:");
while ((line = br.readLine()) != null) {
System.out.println(line);
}
System.out.println();
}
This Code Works Fine when I Uses Simple shell script like.
#!/bin/bash
# Call this script with at least 3 parameters, for example
# sh scriptname 1 2 3 4
echo "first parameter is $1"
echo "Second parameter is $2"
echo "Third parameter is $3"
echo "Third parameter is $4"
exit 0
Can Any one Suggest me the way where i can Open Cygwin and then parameters to shell script
becoz. My another Shell script doesn't work at the same location showing error msg.
app.sh: line 57: lib/renameapp.sh: No such file or directory
app.sh: line 226: clear: command not found
app.sh: line 69: grep: command not found
app.sh: line 69: cut: command not found
app.sh: line 74: grep: command not found
Can Any one Suggest me How to Open Cygwin Terminal using java and Run shell Script using java..
Thanks in Advance...
You should either setup your %PATH environment variable appropriately, or use absolute paths in your shell script.
The PATH variable is not being set as you expect -- it may be that the environment is being lost when you start the process from Java, or maybe Cygwin is not doing its normal PATH magic because it isn't a login shell, I'm not sure. Either way, just add export PATH="$PATH:/bin:/usr/bin:/usr/local/bin" to the top of your script and it will almost certainly work again.
Is it possible to open the command prompt (and I guess any other terminal for other systems), and execute commands in the newly opened window?
Currently what I have is this:
Runtime rt = Runtime.getRuntime();
rt.exec(new String[]{"cmd.exe","/c","start"});
I've tried adding the next command after the "start", I've tried running another rt.exec containing my command, but I can't find a way to make it work.
If it matters, I'm trying to run a command similar to this:
java -flag -flag -cp terminal-based-program.jar
EDIT Unfortunately I have had some strange findings. I've been able to successfully launch the command prompt and pass a command using this:
rt.exec("cmd.exe /c start command");
However, it only seems to work with one command. Because, if I try to use the command separator like this, "cmd.exe /c start command&command2", the second command is passed through the background (the way it would if I just used rt.exec("command2");). Now the problem here is, I realized that I need to change the directory the command prompt is running in, because if I just use the full path to the jar file, the jar file incorrectly reads the data from the command prompt's active directory, not the jar's directory which contains its resources.
I know that people recommend staying away from rt.exec(String), but this works, and I don't know how to change it into the array version.
rt.exec("cmd.exe /c cd \""+new_dir+"\" & start cmd.exe /k \"java -flag -flag -cp terminal-based-program.jar\"");
If you are running two commands at once just to change the directory the command prompt runs in, there is an overload for the Runtime.exec method that lets you specify the current working directory. Like,
Runtime rt = Runtime.getRuntime();
rt.exec("cmd.exe /c start command", null, new File(newDir));
This will open command prompt in the directory at newDir. I think your solution works as well, but this keeps your command string or array a little cleaner.
There is an overload for having the command as a string and having the command as a String array.
You may find it even easier, though, to use the ProcessBuilder, which has a directory method to set your current working directory.
Hope this helps.
public static void main(String[] args) {
try {
String ss = null;
Process p = Runtime.getRuntime().exec("cmd.exe /c start dir ");
BufferedWriter writeer = new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));
writeer.write("dir");
writeer.flush();
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));
System.out.println("Here is the standard output of the command:\n");
while ((ss = stdInput.readLine()) != null) {
System.out.println(ss);
}
System.out.println("Here is the standard error of the command (if any):\n");
while ((ss = stdError.readLine()) != null) {
System.out.println(ss);
}
} catch (IOException e) {
System.out.println("FROM CATCH" + e.toString());
}
}
The following works for me on Snow Leopard:
Runtime rt = Runtime.getRuntime();
String[] testArgs = {"touch", "TEST"};
rt.exec(testArgs);
Thing is, if you want to read the output of that command, you need to read the input stream of the process. For instance,
Process pr = rt.exec(arguments);
BufferedReader r = new BufferedReader(new InputStreamReader(pr.getInputStream()));
Allows you to read the line-by-line output of the command pretty easily.
The problem might also be that MS-DOS does not interpret your order of arguments to mean "start a new command prompt". Your array should probably be:
{"start", "cmd.exe", "\c"}
To open commands in the new command prompt, you'd have to use the Process reference. But I'm not sure why you'd want to do that when you can just use exec, as the person before me commented.
You just need to append your command after start in the string that you are passing.
String command = "cmd.exe /c start "+"*your command*";
Process child = Runtime.getRuntime().exec(command);
String[] command = {"cmd.exe" , "/c", "start" , "cmd.exe" , "/k" , "\" dir && ipconfig
\"" };
ProcessBuilder probuilder = new ProcessBuilder( command );
probuilder.directory(new File("D:\\Folder1"));
Process process = probuilder.start();
You can use any on process for dynamic path on command prompt
Process p = Runtime.getRuntime().exec("cmd.exe /c start dir ");
Process p = Runtime.getRuntime().exec("cmd.exe /c start cd \"E:\\rakhee\\Obligation Extractions\" && dir");
Process p = Runtime.getRuntime().exec("cmd.exe /c start cd \"E:\\oxyzen-workspace\\BrightleafDesktop\\Obligation Extractions\" && dir");
Please, place your command in a parameter like the mentioned below.
Runtime.getRuntime().exec("cmd.exe /c start cmd /k \" parameter \"");
You have to set all \" (quotes) carefully. The parameter \k is used to leave the command prompt open after the execution.
1) to combine 2 commands use (for example pause and ipconfig)
Runtime.getRuntime()
.exec("cmd /c start cmd.exe /k \"pause && ipconfig\"", null, selectedFile.getParentFile());
2) to show the content of a file use (MORE is a command line viewer on Windows)
File selectedFile = new File(pathToFile):
Runtime.getRuntime()
.exec("cmd /c start cmd.exe /k \"MORE \"" + selectedFile.getName() + "\"\"", null, selectedFile.getParentFile());
One nesting quote \" is for the command and the file name, the second quote \" is for the filename itself, for spaces etc. in the name particularly.
I am trying to execute a program from the Java code. Here is my code:
public static void main(String argv[]) {
try {
String line;
Process p = Runtime.getRuntime().exec(new String[]{
"/bin/bash", "-c", "executable -o filename.txt"});
BufferedReader input = new BufferedReader(
new InputStreamReader(p.getInputStream()));
while ((line = input.readLine()) != null) {
System.out.println(line);
}
input.close();
} catch (Exception err) {
err.printStackTrace();
}
}
My OS is Mac OS X 10.6.
Now, the executable I am trying to run is supposed to spit the output to filename.txt. If I take this command and run it on the terminal, it works fine and the filename.txt gets populated also. But, from my java program the file is not created.
if instead I use executable > filename.txt then the filename.txt is created but is empty. Not sure what's wrong here. The executable I am trying to run is Xtide (if that helps).
I would really appreciate any help I can get.
Thanks,
You cannot redirect output to file and read the output in java. It's one or the other. What you want is this:
Process p = Runtime.getRuntime().exec(new String[]{
"/bin/bash", "-c", "executable -o filename.txt"});
p.waitFor();
BufferedReader input = new BufferedReader(
new InputStreamReader(new FileInputStream("filename.txt")));
while ((line = input.readLine()) != null) {
System.out.println(line);
}
The main changes are:
p.waitFor(), since process execution is asynchronous, so you have to wait for it to complete.
The data is read from the file rather than from the output of the process (since this will be empty.)
The answer from mdma works (and I voted it up), but you might also want to consider the version where you do read the output stream directly from executable:
Process p = Runtime.getRuntime().exec(new String[]{
"/bin/bash", "-c", "executable"});
p.waitFor();
BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream())_;
while ((line = input.readLine()) != null) {
System.out.println(line);
}
Correct me if I am wrong, but the symptoms are as follows:
exec("/usr/bash", "-c", "executable > filename.txt") creates an empty file.
exec("/usr/bash", "-c", "executable -o filename.txt") does not create a file.
One or both of the above gives an exit code of 255 when you look at it.
When you run the command from the command line as executable -o filename.txt or executable > filename.txt it works as expected.
In the light of the above, I think that the most likely cause is that /bin/bash is not finding the executable when you launch it from Java. The fact that the first example does create an empty file means that /bin/bash is doing something. But if you try to run
$ unknown-command > somefile.txt
from a bash shell prompt you will get an error message saying that the command cannot be found and an empty "something.txt" file. (You would not see the error message in your Java app because it is being written to stderr, and you are not capturing it.) The reason that the empty "something.txt" file is created is that it is opened by the shell before it attempts to fork and exec the "executable".
If this is the problem, then the simple solution is to use the absolute pathname for the executable.
Also, if you are not doing any command line redirection or other shell magic, there is no need to run the executable in a new bash instance. Rather, just do this:
Process p = Runtime.getRuntime().exec("executable", "-o", filename.txt");
then wait for the process to complete and check the exit code before trying to read the file contents.