Passing a handle between processes

[axr0284]

Hi,
I am researching if it is possible to pass a handle to the serial port to another process. If I have process A that opened a handle to the serial port and then process A forks a new process B (If even possible) by calling an execultable on the hardrive. Can process A pass the handle as a command line argument to process B or maybe put the address in the registry where process B can access it. Thanks
Amish

[stober]

child process inherits all handles of the parent. Its not necessary to pass anything from parent to child because child already knows about the open handles.

http://www.hmug.org/man/2/fork.php

>>maybe put the address in the registry

*nix doesn't have anything called "the registry" -- that's an MS-Windows term. And MS-Windows doesn't "fork" new processes, that's a *nix term. Which operating system are you using anyway?

[axr0284]

Sorry,
I forgot to add that, I will be using Windows. I guess I get confused with all the fuctions between linux and windows. Is there anything like fork in windows.
Amish

[Siddhartha]

Processes in Windows can be created using an API like CreateProcess.

One parameter of interest to you might be -

BOOL CreateProcess(
		   LPCTSTR lpApplicationName,
		   LPTSTR lpCommandLine,
		   LPSECURITY_ATTRIBUTES lpProcessAttributes,
		   LPSECURITY_ATTRIBUTES lpThreadAttributes,
		   BOOL bInheritHandles,
		   DWORD dwCreationFlags,
		   LPVOID lpEnvironment,
		   LPCTSTR lpCurrentDirectory,
		   LPSTARTUPINFO lpStartupInfo,
		   LPPROCESS_INFORMATION lpProcessInformation
		   );

[Siddhartha]

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Regards,
Siddhartha

[axr0284]

Sweet that fits my design. Thanks a lot,
Amish

[Siddhartha]

You are welcome...