- 1 year ago
Capture stdout of child process with overlapped I/O
To capture the standard output (stdout) of a child process with overlapped I/O, you can use the CreateProcess
function in combination with named pipes for inter-process communication. Here's a basic outline of the steps involved:
Create Named Pipes: Set up two named pipes, one for the child process to write its stdout to and another for the parent process to read from. You can use the
CreateNamedPipe
function to create the named pipes.Create Child Process: Use the
CreateProcess
function to create the child process. Set thehStdOutput
parameter of theSTARTUPINFO
structure to the write end of the named pipe created in the previous step. This will redirect the stdout of the child process to the named pipe.Read from Named Pipe: In the parent process, open the read end of the named pipe created earlier. Use asynchronous I/O, such as overlapped I/O or completion ports, to read the output from the named pipe.
Wait for Child Process Completion: Use the
WaitForSingleObject
orWaitForMultipleObjects
function to wait for the child process to exit.Process the Captured Output: Once the child process has completed, process the captured stdout from the named pipe as desired.
Please note that implementing this approach involves more advanced concepts and may require familiarity with inter-process communication, asynchronous I/O, and Windows APIs. It's recommended to refer to the Windows API documentation and example code to gain a deeper understanding and implement the solution effectively.