Added TIOCSWINSZ to struct_info and added corner case stub

[DataKinds]

This fixes issue #6463 by adding the incorrectly missing TIOCSWINSZ (which is defined in system/lib/libc/musl/arch/emscripten/bits/ioctl.h) to the struct_info.json file and handling it in the ioctl() syscall.

[kripken]

Thanks! Looks good. Please just add yourself to AUTHORS, and add a test (best thing is to grep in tests/ for similar things, like another ioctl call very much like that one, and add a line in there to test this, and confirm it fails before your fix).

[DataKinds]

Done & tests passed.

[kripken]

Looks good! For the test, you also need to add code to the test suite so it runs, with something like this in tests/test_other.py:

  def test_ioctl_window_size(self):
    self.do_other_test(os.path.join('other', 'ioctl_window_size'))

That expects the source file to be in tests/other/ and end with suffix cpp, and there should be .out file alongside it with the expected output (which here could be that you add a printf after doing those ioctl calls, to say everything went ok - might be worth printing the return codes from ioctl). See e.g. c8d9b35 for a recently added test along those lines.

[DataKinds]

Done, done, and done. Sorry about all the back & forth! I'm new to contributing to OSS.

[kripken]

these 4 lines can be replaced with

    self.do_other_test(os.path.join('other', 'ioctl'))

, but you'll need to rename the c file to test.cpp and the output file to test.out.

[kripken]

Also, would be better to do self.do_other_test(os.path.join('other', 'ioctl', 'window_size')) (add a subdir window_size).

[DataKinds]

Updated it. My local copy didn't have self.do_other_test so I pulled it from upstream -- you should be able to remove any changes this made while merging.

[kripken]

Looks like you need to merge upstream incoming again, as there are conflicts.

[DataKinds]

@kripken Merged upstream.

[kripken]

Thanks, perfect!