I'm using Loadrunner controller 11.51, I have an issue when trying to open file to write the output results using "fopen" function, the file is unable to open.
please note that the code is work when I'm running it on a VUGen(11.51).
it seems that its a permission issue in the "LoadGenerators" used in LoadController.
if any of you had faced such problem please advise.
the snippet of code I'm using:
if ((file_stream = fopen(filename, access_mode)) == NULL)
{
lr_error_message ("Cannot open or create %s", filename);
return -1;
}
else
{
fprintf(file_stream, "%s", "MyInfo" );
fclose(file_stream);
}
the returned value from fopen(filename, access_mode) function when I'm running the script from using Loadrunner controller is always null.
I've tried a work around solution for solving the issue and it get solved by putting the Controller machine as a generator, as by default the controller have full permission to its machine.
Related
I have developed a client server application with casablanca cpprestskd.
Every 5 minutes a client send informations from his task manager (processes,cpu usage etc) to server via POST method.
The project should be able to manage about 100 clients.
Every time that server receives a POST request he opens an output file stream ("uploaded.txt") ,extract some initial infos from client (login,password),manage this infos, save all infos in a file with the same name of client (for example: client1.txt, client2.txt) in append mode and finally reply to client with a status code.
This is basically my POST handle code from server side:
void Server::handle_post(http_request request)
{
auto fileBuffer =
std::make_shared<Concurrency::streams::basic_ostream<uint8_t>>();
try
{
auto stream = concurrency::streams::fstream::open_ostream(
U("uploaded.txt"),
std::ios_base::out | std::ios_base::binary).then([request, fileBuffer](pplx::task<Concurrency::streams::basic_ostream<unsigned char>> Previous_task)
{
*fileBuffer = Previous_task.get();
try
{
request.body().read_to_end(fileBuffer->streambuf()).get();
}
catch (const exception&)
{
wcout << L"<exception>" << std::endl;
//return pplx::task_from_result();
}
//Previous_task.get().close();
}).then([=](pplx::task<void> Previous_task)
{
fileBuffer->close();
//Previous_task.get();
}).then([](task<void> previousTask)
{
// This continuation is run because it is value-based.
try
{
// The call to task::get rethrows the exception.
previousTask.get();
}
catch (const exception& e)
{
wcout << e.what() << endl;
}
});
//stream.get().close();
}
catch (const exception& e)
{
wcout << e.what() << endl;
}
ManageClient();
request.reply(status_codes::OK, U("Hello, World!")).then([](pplx::task<void> t) { handle_error(t); });
return;
}
Basically it works but if i try to send info from due clients at the same time sometimes it works sometimes it doen't work.
Obviously the problem if when i open "uploaded.txt" stream file.
Questions:
1)Is CASABLANCA http_listener real multitasking?how many task it's able to handle?
2)I didn't found in documentation ax example similar to mine,the only one who is approaching to mine is "Casalence120" Project but he uses Concurrency::Reader_writer_lock class (it seems a mutex method).
What can i do in order to manage multiple POST?
3)Is it possible to read some client infos before starting to open uploaded.txt?
I could open an output file stream directly with the name of the client.
4)If i lock access via mutex on uploaded.txt file, Server become sequential and i think this is not a good way to use cpprestsdk.
I'm still approaching cpprestskd so any suggestions would be helpful.
Yes, the REST sdk processes every request on a different thread
I confirm there are not many examples using the listener.
The official sample using the listener can be found here:
https://github.com/Microsoft/cpprestsdk/blob/master/Release/samples/CasaLens/casalens.cpp
I see you are working with VS. I would strongly suggest to move to VC++2015 or better VC++2017 because the most recent compiler supports co-routines.
Using co_await dramatically simplify the readability of the code.
Substantially every time you 'co_await' a function, the compiler will refactor the code in a "continuation" avoiding the penalty to freeze the threads executing the function itself. This way, you get rid of the ".then" statements.
The file problem is a different story than the REST sdk. Accessing the file system concurrently is something that you should test in a separate project. You can probably cache the first read and share the content with the other threads instead of accessing the disk every time.
I need to know if a specified directory (local or shared path with login credentials) has write permissions or not.
I am using GetFileAttributes but it always returns FILE_ATTRIBUTE_DIRECTORY and nothing else.
My code is something like below
if(storageLocation != "")
{
//! check if local storage - user name password would be empty
if(storageUsername == "" && storagePassword == "")
{
//! local storage
//! lets check whether the local path is a valid path or not
boost::filesystem::path fpath(storageUsername.c_str());
if(boost::filesystem::exists(fpath))
{
DWORD attrib = ::GetFileAttributes(storageLocation.c_str());
if((attrib != INVALID_FILE_ATTRIBUTES) &&
((attrib & FILE_ATTRIBUTE_READONLY) != FILE_ATTRIBUTE_READONLY))
{
string strWritePermission = "TRUE";
}
}
}
else
{
uncLocation_t uncLocation;
uncLocation.m_location = storageLocation;
uncLocation.m_username = storageUsername;
uncLocation.m_password = storagePassword;
if(0 == connectToUNCLocation(uncLocation)) // My function to connect to UNC location
{
//! successful connection
DWORD attrib = ::GetFileAttributes(storageLocation.c_str());
if((attrib != INVALID_FILE_ATTRIBUTES) &&
((attrib & FILE_ATTRIBUTE_READONLY) != FILE_ATTRIBUTE_READONLY))
{
string strWritePermission = "TRUE";
}
}
}
}
I don't understand why but GetFileAttributes always return 0x16.
I have tested it by creating a shared folder and creating 2 folders in it. One with read only permissions and other with default permissions. But in all 3 cases (shared folder, read only folder and default permission folder) I am getting same return value.
There is on way to find write permission, to create a temporary file (usinf CreateFile in GENERIC_WRITE mode) and if successfully created, delete it. But I don't want to use this method as I don't want my application to create a temporary file each time user specifies a location.
Please suggest what should be done.
You would need to replicate the security checking that Windows performs. The AccessCheck function will help that. You are currently well wide of the mark in looking at the file attributes. Windows security is so much more complicated than that.
Although you said you did not want to do it, the right solution is not to try to check. Simply do whatever it is you are attempting to do. If the system decides that the user does not have sufficient rights, then CreateFile will fail, and the last error will be set to ERROR_ACCESS_DENIED. There's no need for temporary files. You just try to do whatever it is you are doing, and let it fail. You have to handle failure anyway since there are many ways for a file operation to fail, not just security.
As the saying goes, it is better to ask forgiveness than permission.
I think you are looking for AccessCheck. FYI, this is not a C++ question, but a Windows API question.
This is my first time writing in Swift, Cocoa (have experience in Cocoa Touch), and using Authorization, so I honestly have no idea if I am even on the right track. I am trying to make a modification to the hosts file, which requires user authentication, but both the AuthorizationCreate and AuthorizationExecuteWithPrivileges methods are giving errors.
var authorizationRef:AuthorizationRef
var status:OSStatus
status = AuthorizationCreate(nil, environment:kAuthorizationEmptyEnvironment, flags:kAuthorizationFlagDefaults, authorization:&authorizationRef)
let overwrite_hosts = "echo \(hostsContents) > /private/etc/hosts"
let args = [overwrite_hosts.cStringUsingEncoding(NSUTF8StringEncoding)]
status = AuthorizationExecuteWithPrivileges(authorizationRef, pathToTool:"/bin/sh", options:kAuthorizationFlagDefaults, arguments:args, communicationsPipe:nil)
Me calling AuthorizationCreate is throwing "Type '()' does not conform to protocol 'AuthorizationRef'" and my call of AuthorizationExecuteWithPrivileges is throwing "Could not find an overload for '__conversion' that accepts the supplied arguments"
Any ideas? Am I approaching this incorrectly?
Thanks for any help!
I was able to figure out how to do it via AppleScript, but you should be able to do it using the Authorization method I was trying before, therefore leaving this question open. Anybody looking for a quick solution (no error checks implemented) you can use what I wrote below:
func doScriptWithAdmin(inScript:String) -> String{
let script = "do shell script \"\(inScript)\" with administrator privileges"
var appleScript = NSAppleScript(source: script)
var eventResult = appleScript.executeAndReturnError(nil)
if !eventResult {
return "ERROR"
}else{
return eventResult.stringValue
}
}
I am making a SENT in Gmod with Lua and I want it to have a simple GUI menu using Derma. I have put the following into my cl_init.lua file:
local plantwinow = vgui.Create("DFrame")
plantwinow:SetSize(202, 102)
plantwinow:Center()
plantwinow:SetTitle("Level " +lvltext +" Plant")
plantwinow:SetDraggable(true)
plantwinow:SetSizable(false)
plantwinow:ShowCloseButton(true)
plantwinow:MakePopup()
This gives me the error
prog.lua:1: attempt to index global 'vgui' (a nil value)
How can I fix this?
Try to register your file using includes and AddCSLuafile it, here is how it works:
shared.lua:
if SERVER then
AddCSLuaFile("cl_init.lua")
else
include("cl_init.lua")
end
If your addon / entity has init.lua then please tell me your init.lua.
i have a new problem in image magick that look strange ..
i'm using mac osx snow leopard and i've installed image magick on it and it's working fine on command ..
but when i call it from the grails class like the following snippet it gives me
"Cannot run program "convert": error=2, No such file or directory"
the code is :-
public static boolean resizeImage(String srcPath, String destPath,String size) {
ArrayList<String> command = new ArrayList<String>(10);
command.add("convert");
command.add("-geometry");
command.add(size);
command.add("-quality");
command.add("100" );
command.add(srcPath);
command.add(destPath);
System.out.println(command);
return exec((String[])command.toArray(new String[1]));
}
private static boolean exec(String[] command) {
Process proc;
try {
//System.out.println("Trying to execute command " + Arrays.asList(command));
proc = Runtime.getRuntime().exec(command);
} catch (IOException e) {
System.out.println("IOException while trying to execute " );
for(int i =0 ; i<command.length; i++) {
System.out.println(command[i]);
}
return false;
}
//System.out.println("Got process object, waiting to return.");
int exitStatus;
while (true) {
try {
exitStatus = proc.waitFor();
break;
} catch (java.lang.InterruptedException e) {
System.out.println("Interrupted: Ignoring and waiting");
}
}
if (exitStatus != 0) {
System.out.println("Error executing command: " + exitStatus);
}
return (exitStatus == 0);
}
i've tried normal command like ls and it's ok so the problem is that grails can't find convert command itself.. is it a os problem or something?
(see lower for the answer)
I have run into the same problem. The issue appears to be something with Mac OS X specifically, as we have several Linux instances running without error. The error looks similar to the following:
java.io.IOException: Cannot run program "/usr/bin/ImageMagick-6.7.3/bin/convert /a/temp/in/tmpPic3143119797006817740.png /a/temp/out/100000726.png": error=2, No such file or directory
All the files are there, and in chmod 777 directories - and as you pointed out, running the exact command from the shell works fine.
My theory at this point is that imagemgick can not load some sort of library itself, and the "no such file" is in reference to an dylib or something along those lines.
I have tried setting LD_LIBRARY_PATH and a few others to no avail.
I finally got this working. Here is how I have it setup. I hope this helps.
The crux of the fix, for me, was I wrapped the 'convert' into a shell script, set a bunch of environment variables, and then call that shell script instead of convert directly:
(convertWrapper.sh)
export MAGICK_HOME=/usr/local/ImageMagick-6.7.5
export MAGICK_CONFIGURE_PATH=${MAGICK_HOME}/etc/ImageMagick:${MAGICK_HOME}/share/doc/ImageMagick/www/source
export PATH=${PATH}:${MAGICK_HOME}/bin
export LD_LIBRARY_PATH=${MAGICK_HOME}/lib:${LD_LIBRARY_PATH}
export DYLD_LIBRARY_PATH=${DYLD_LIBRARY_PATH}:${MAGICK_HOME}/lib
export MAGICK_TMPDIR=/private/tmp
echo "$#" >> /private/tmp/m.log 2>&1
/usr/local/ImageMagick-6.7.5/bin/convert -verbose "$#" >> /private/tmp/m.log 2>&1
(convertWrapper.sh)
Additionally, the convert call was doing some rather complicated stuff, so I added the parameter '-respect-parenthesis' (which may or may not have had an effect).
I am not sure how much of the environment variable setting is needed as I was stabbing in the dark for a while, but since this is only for my development box...
You need to work out what your PATH is set to when you run a command from Java. It must be different to the one you have when running from the terminal.
Are you running Grails (via Tomcat?) as a different user? It might have a different path to your normal user.
you might want to try one of the Image Plugins that are part of the grails ecosystem
http://www.grails.org/ImageTools+plugin
the grails path when the app is running in the server is probably different from running java from the command line
I do so:
Put "convert" file to /usr/bin
Then add to Config.groovy:
gk {
imageMagickPath = "/usr/bin/convert"
}
Then in my ImageService.groovy:
import org.springframework.web.context.request.RequestContextHolder as RCH
[..]
def grailsApplication = RCH.requestAttributes.servletContext.grailsApplication
def imPath = grailsApplication.config.gk.imageMagickPath
def command = imPath + " some_properties"
def proc = Runtime.getRuntime().exec(command)
So this way you get command like: /usr/bin/convert some_properties
And it works, but don't forget to put file "convert" to you location and use it with this location.