Gallopsled / pwntools / 7391705281

74%

push

github

Add support to start a process on Windows (#2310)

* Add support to start a process on Windows

This is heavily inspired by https://github.com/masthoon/pwintools

Allows to use the `process` tube on a Windows host running local
processes. I've tried to keep the changes at a minimum. Windows doesn't
support non-blocking reads, so I've opted to handle the reading in a
separate thread to simulate the non-blocking check.

* Fix `misc.which()` on Windows

`os.getuid()` is only supported on unix.

* Support [read|write]mem, libs and cwd

* Update CHANGELOG

* Don't cache loaded modules

* Wait output on stdout in `process.can_recv_raw`

Instead of handling the timeout for reading poorly in `process.recv_raw`,
wait for any bytes to be available in `process.can_recv_raw` like on linux.

This prevents a 100% spin of one core in `tube.interactive()` since it
expects the thread to block for `timeout` seconds while we would return
immediately previously.

* Remove PythonForWindows dependency

This loses the `readmem` and `writemem` feature, but that's not
necessary for this basic process startup support.

* Fix cyclic imports

* Ignore errors in reading thread

This could cause a deadlock / fastfail on shutdown when stdout is closed, thus read(1) fails
and the exception is tried to be printed to the console while stderr is in the process of getting
closed.

4556 of 7257 branches covered (0.0%)

12808 of 17234 relevant lines covered (74.32%)

0.74 hits per line