Develop Reference

Calling RubyScript via IronRuby with command line parameters or arguments

We're pretty new to Ruby and very new to IronRuby so please bear with me. We're in C# trying to do something very simple. I've got a ruby script called doExtract.rb and I need to pass it a file called myfile.txt. We've copied all the files required into the /bin folder of the build and they run correctly when called via the command line.
var rubyRuntime = Ruby.CreateRuntime();
var rubyEngine = rubyRuntime.GetEngine("rb");
String fullPath = String.Format("{0} {1}", "doExtract.rb", "myfile.txt");
rubyEngine.ExecuteFile(fullPath);
gives me an error of "Illegal characters in path"
I've searched high & low on the t'interwebs and to no avail.
We've tried adding the search paths to the rubyEngine and using a full path to the myfile.txt but still get the error. If we call a simple ruby script with no parameters then it works fine. We've also tried with escaped slashed both backwards and forwards in the myfile.txt. I'm sure it'd something really stupid that we're not doing !
Any suggestions where we're going wrong ?
Thanks

Launch minecraft 1.6.4 from command line with C#

I'm currently working on a custom Minecraft 1.6.4 launcher.
I have written most of the code is C# however I'm writing the final piece of code in batch.
This seems to work to launch the minecraft 1.5.2 jar
cd "%~1"
java -Xms512m -Xmx1g -Djava.library.path=Bin\bin\native\ -cp Bin\bin\* net.minecraft.client.Minecraft %~2 %~3
pause
(C# Works out the session ID (%~3))
However in minecraft 1.6.4 I get an error:
Error: Could not find or load main class net.minecraft.client.Minecraft
I have heard about a change in the way Minecraft launches, is there anyway for me to implement the new system into my launcher?
If there is a way to do it without batch that would be awesome!
C# code to launch the batch file:
string sessionID = Session.DoLogin(tbUser.Text, tbPassword.Text).SessionId;
Process p = Process.Start("launch.bat", #"""" + filePath + #"""" + " " + tbUser.Text + " " + sessionID);
p.WaitForExit();

I was the first to make a C# launcher for minecraft and I'm happy to share some experiences. I'm sorry to reply to you so late!
Note that you are looking to start the class "net.minecraft.client.main.Main" instead of "net.minecraft.client.Minecraft". I came across this as well when I had to port my launcher to 1.6. It still works for 1.7.4 currently.
The example below is a cleaned up batch command straight from my (EDIT: OLD, but gold) open source launcher
Minecraft 1.7.4 batch launch (jvm arguments):
java
-Djava.library.path=C:\Users\<username>\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\
-cp
C:\Users\<username>\AppData\Roaming\.minecraft\versions\1.7.4\1.7.4.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.2\authlib-1.2.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.1-nightly-20131120\lwjgl-2.9.1-nightly-20131120.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.1-nightly-20131120\lwjgl_util-2.9.1-nightly-20131120.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1-nightly-20131120\lwjgl-platform-2.9.1-nightly-20131120-natives-windows.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch\5.12\twitch-5.12.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-platform\5.12\twitch-platform-5.12-natives-windows-64.jar;
C:\Users\<username>\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-external-platform\4.5\twitch-external-platform-4.5-natives-windows-64.jar;
net.minecraft.client.main.Main
--username=<your username>
--accessToken <your accesstoken>
--version 1.7.4
--gameDir C:\Users\<username>\AppData\Roaming\.minecraft
--assetsDir C:\Users\<username>\AppData\Roaming\.minecraft\assets
--userProperties {}
--uuid <your uuid>
You can also find out how to get the uuid, session token, and so on on in the same namespace in the link above , or HERE.

This might help:
http://s3.amazonaws.com/Minecraft.Download/versions/1.6.4/1.6.4.json
The link format works for all minecraft versions so you can compare the information and check what has changed.
Be also aware that the Minecraft authentication system has changed. (I think you have to use the new system since 1.7 but it might apply for 1.6 too)
Edit:
You also might want to decompile the official launcher (I did that for my own launcher) provides some useful information about how stuff works.

Two things; console app run without .exe and args (C# console app)

Hi I would like to make my self able to maybe define my app into CMD by that I can type program instead of program.exe kind of like how ping works for example.
I also need help with arguments.
The point of my app is to send a get request to a local server evaling PHP fetching a result from it so I can easy quick debug things and calculate things ect from CMD.
So for example I have to do.
W:\Users\example>e.exe
echo "example";
.....
example
W:\Users\example>
Tow things with the above are very annoying. I need to enter e.exe and THAN I need to enter the code to eval :-/
How could I make it so I could just do
W:\Users\example>e echo "example";
.....
example
W:\Users\example
I really would like to get this working to make use faster + more simple ! this is a programmers way to calculating math :P
EDIT:
Below is the code;
static void Main(string[] args)
{
WebClient client = new WebClient();
Console.WriteLine("...");
string input = Console.ReadLine();
string php = client.DownloadString("http://192.168.1.50/test.php?exec="+input);
Console.WriteLine(".....");
Console.WriteLine("");
Console.WriteLine(php);
Console.WriteLine("");
}
I've tried to do "+arg[0] but does nothing at start :?

Don't type ".exe" as you don't need to type it... You may want to put your e.exe some place listed in PATH environment variable (or add path to the executable to the PATH).
Main(string[] args) are arguments passed to your program - use them whatever way you want. Note that they will be split on spaces, so you may need to String.Join them back if you need all arguments as one.
You can also use Environment.CommandLine if you need access to comple not parsed command line.

How to run command line code from within C# Windows Form?

I am fairly new to coding, but have built a few small things. One thing I figured out on my last project was how to run 2 simple commands normally run from a console, but from within a form application instead. Simply, the form had 2 buttons and clicking one caused ipconfig to run and the other ipconfig /all. It then posted the ip information coming from the command into another form I created as a message box. That is important because I am trying to do something similar and nothing is working now.
I have a form that has a spot for user name and a spot for password. On submit, I want it to essentially run the following:
NET USE F: \\ALPHA\CLIENTAPPS /user:domain\%username% %password% /persistent:no
NET USE O: \\ALPHA\USERS /user:domain\%username% %password% /persistent:no
NET USE S: \\ALPHA\COMPANY /user:domain\%username% %password% /persistent:no
Where %username% and %password% are captured from the form and domain will be our actual domain.
Using similar methods to the aforementioned ipconfig program that is working, this is what I came up with. However, when I click the Submit button, nothing happens, no errors, nor does it actually create the network share:
private void btnSubmit_Click(object sender, EventArgs e)
{
string un = txtUsername.Text;
string pw = txtPassword.Text;
System.Diagnostics.ProcessStartInfo PR = new System.Diagnostics.ProcessStartInfo("cmd", #" /c net use W: \\\\ALPHA\\CLIENTAPPS /user:acsdish\\" + un + " " + pw + "/persistent:no");
PR.RedirectStandardOutput = true;
PR.UseShellExecute = false;
PR.CreateNoWindow = true;
System.Diagnostics.Process StartPR = new System.Diagnostics.Process();
StartPR.StartInfo = PR;
StartPR.Start();
}
What am I missing here, or is there a better way? Thanks.
Mike

System.Diagnostics.ProcessStartInfo PR = new System.Diagnostics.ProcessStartInfo("cmd", #" /c net use W: \\\\ALPHA\\CLIENTAPPS /user:acsdish\\" + un + " " + pw + "/persistent:no");
Try to remove "#" or remove escaping of "\" char
Info here (Verbatim string literals)

nothing happens, no errors, nor does it actually create the network share
You've done a lot to ensure that. "No errors" is easy to explain, you don't check for errors nor do you give a way for the user to see them because you made sure that the console window isn't visible. If the command failed that it won't be visible. Checking Process.ExitCode is a minimal requirement.
Next flaw is that you create the mapping to the share for a particular user. Which is fine, drive mappings are a per-user setting. But you are not actually logged-in as that user so you can't see those mappings. You'll have to hit Ctrl+Alt+Del and switch the user account. But that's a lost cause because you passed /persistent:no. That means "persistent while the user is logged in".
Ultimate flaw is that you leave it up to an another process to take care of it. That always loses critical information, especially errors. You should pinvoke the Windows api function that does this so you know when it doesn't work and don't burn a gazillion cycles to run another process. Pinvoke WNetAddConnection2().

Changing environment variables of the calling process

This one seems trivial but the answer has eluded me for a few days now.
I have a Windows batch file, that calls a C# program to do an extra verification that cannot be done in a batch file. After the verification is complete I need to return a status and a string back to the calling shell.
Now the return value is trivial and my C# console app simply sets a return value (exit code if you will). And I thought the string will also be a piece of cake. I attempted to define a new shell variable using the:
Environment.SetEnvironmentVariable("ERR", "Some text");
This call should (and does) define a shell variable within the current process - that is the very C# process that created the variable. The value is lost as soon as the C# app terminates and the shell that created the C# app knows nothing about the variable. So... A call with no particular use... At all... Unless perhaps if I created a child process from the C3 app, perhaps it would inherit my variables.
The EnvironmentVariableTarget.Machine and EnvironmentVariableTarget.User targets for the SetEnvironmentVariable call don't solve the problem either, as only a newly created process will get these new values from the registry.
So the only working solution I can think of is:
write to stdout
write to a file
encode extra meaning into the return value
The first two are a bit ugly and the last one has its limitations and problems.
Any other ideas (how to set a shell variable in the parent process)? Maybe such shell variable modifications are a security concern (think PATH)...
Thank-you for your time.

I had the same problem as Ryan and the only thing that came to my mind as a work-around was to write a batch in error out to set the variable and to call it from the batch.
ConsoleApplication1.exe:
'put some sensible code here
'put result in variable myResult
Dim myResult As String = Guid.NewGuid().ToString("D").ToUpperInvariant()
Console.WriteLine("Normal output from the consonle app")
Console.Error.WriteLine("#ECHO OFF")
Console.Error.WriteLine("SET zzzResult={0}", myResult)
Test.cmd (the calling batch):
#ECHO OFF
:Jump to folder of batch file
PUSHD %~d0%~p0
:Define a temp file
SET zzzTempFile=%TEMP%\TMP%Random%.CMD
:Call .NET console app
ConsoleApplication1.exe 2>%zzzTempFile%
:Call the generated batch file
CALL %zzzTempFile%
:Clean up temp file
DEL %zzzTempFile%
:Clean up variable
SET zzzTempFile=
:Do something with the result
ECHO Yeah, we finally got it!
ECHO:
ECHO The value is "%zzzResult%".
ECHO:
:Clean up result variable
SET zzzResult=
:Go back to original folder
POPD
That should do the trick. And yes, I do know this is an old post and Ryan is solving other issues by now, but there might be still somebody else out there having the same problem...

What you are asking is to be able to arbitrarily write to the memory space of a running process. For good reason, this is not possible without SeDebugPrivilege.
Any of the three solutions you list will work. Stdout is the standard way to communicate with a batch script.
By the way, you're writing a Windows batch file. I'm pretty sure the ship has already sailed on "a bit ugly".

If you want to put a value of some output into a variable in the batch you can use the following construct:
FOR /F "usebackq tokens=4 delims=\[\] " %i IN (`ver`) DO set VERSION=%i
ECHO %VERSION%
Output on my OS:
6.1.7601
'usebackq' means we are using back quotes which gives the ability to use a fileset in the command quoted with double quotes. You may not need this. 'tokens' means the index in the resulting string array to select (it can be a range M-N). If you need to skip lines use 'skip=X'). 'delims' are the string separators to use (like string-Split() in .Net).
You will put your console app instead of 'ver' and adapt the delimiters and tokens to match your specific output. If you have more variables to fill you will need to make the if a bit more complex but that should make a good start.

My BAT is a bit rusty, but I think it's possible to retrieve the 'exit' code from processes you've run externally, perhaps via %ERRORLEVEL%. If that's the case, make sure to exit your program via
Environment.Exit(123); // where 123 = error code
You can't add any messages, so you'll have to do that in the .bat file.
If this isn't the case, stdout is probably the best way.

After stumbling on this myself as well recently, I came up with this approach. What I did is run the bat file using the Process class, i.e.
// Spawn your process as you normally would... but also have it dump the environment varaibles
Process process = new Process();
process.StartInfo.FileName = mybatfile.bat;
process.StartInfo.Arguments = #"&&set>>envirodump.txt";
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardError = false;
process.Start();
string output = process.StandardOutput.ReadToEnd();
process.WaitForExit();
// Read the environment variable lines into a string array
string[] envirolines = File.ReadAllLines("envirodump.txt");
File.Delete("envirodump.txt");
// Now simply set the environment variables in the parent process
foreach(string line in a)
{
string var = line.Split('=')[0];
string val = line.Split('=')[1];
Environment.SetEnvironmentVariable(var, val);
}
This seems to have worked for me. It's not the cleanest approach, but will work in a bind. :)