fd_to_handle - Linux


fd_to_handle converts a file descriptor number to a handle, which can be used in Windows API functions. This is useful for interfacing with Windows libraries or code that requires handles.


fd_to_handle [options] <fd>


  • -h, –help: Display help and exit.
  • -v, –verbose: Enable verbose output.


To convert file descriptor number 5 to a handle:

$ fd_to_handle 5

To use the handle in a Windows API function:

#include <windows.h>

int main() {
  HANDLE handle = fd_to_handle(5);
  ... // Use handle with Windows API functions
  return 0;

Common Issues

  • If the file descriptor is not valid, fd_to_handle will fail with an error.
  • If the handle is not properly closed, it may lead to resource leaks.


fd_to_handle can be combined with other Linux commands or tools to perform advanced tasks. For example, it can be used to create a Windows service that wraps a Linux process.

Related Commands