C execute external program

But when i tried system notepad for testing it opened the notepad and stoped the program until i close the notepad but with the LeagueClient. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually.

Visit chat. The above output shows the console application opened Notepad with the name DemoText provided in the arguments. The above code will open the browser and redirect to www.

How to run an external application through a C application? Csharp Server Side Programming Programming. In addition, it returns control to the caller immediately with a FILE object connected to the created pipe so that the caller can communicate with the new program. When communication with the new program is finished, you should call pclose to clean up the file descriptors and reap the child process created by the call to fork. You should also avoid using popen and its accompanying pclose function, but popen does have utility that is worth duplicating in a secure fashion.

The following implementation with a similar API does not make use of the shell. If you do wish to use either system or popen , be extremely careful. First, make sure that the environment is properly set, so that there are no Trojan environment variables. This means that you must ensure that there is no way an attacker can pass malicious data to the shell command. If possible, pass in a fixed string that the attacker cannot manipulate. If the user must be allowed to manipulate the input, only very careful filtering will accomplish this securely.

We recommend that you avoid this scenario at all costs. Our versions differ slightly in both interface and function, but not by too much. In fact, the arguments are passed directly to execve without any modification.

It means " If this is a program, launch it. If it's a document, figure out which program handles it and launch that program and tell it to open this document. An "undocumented" verb also exists when the target is an executable: The RUNAS verb is used to launch programs that need elevated user rights.

There's an example of its usage later in this article. Examples of ShellExecute: This function can do a lot of different things. Here are code examples of some of the many variations. ShellExecute works like that. But what if you want to run a program and keep an eye on it?

For instance, if the program does a specific task, say, generate a report, then you will want to know when that program ends so that you can take the next action say, display or print the report.

You can find out when the launched program ends, but not if you launch it via ShellExecute. That brings us to ShellExecuteEx This works just like ShellExecute, except that you need to populate a structure rather than just set function parameters.

It has a couple of other features, including the one we're going to use: It returns a HANDLE that can be used to see when the Launched program terminates. Exe"; rSEI. That means that the user could close your program, which puts you in a sort of limbo.

A better technique is to not sit there in a loop pumping messages, but rather set a timer and use it to check every so often to see if rSEI.

Start the next step. It's rather uncommon these days, but I'd like to cover it for completeness. If you launch a console application, it might output a series of lines of text to the screen as it operates.

Later, you can process the resulting file output.