test_tcsendbreak fails on OpenBSD

[serhiy-storchaka]

Bug report

test_termios.test_tcsendbreak fails on OpenBSD:

ERROR: test_tcsendbreak (test.test_termios.TestFunctions.test_tcsendbreak)
  File "Lib/test/test_termios.py", line 121, in test_tcsendbreak
    termios.tcsendbreak(self.fd, 1)
termios.error: (25, 'Inappropriate ioctl for device')

tcsendbreak() is not supported for pseudo-terminals there. The test already skips this error, but only on FreeBSD, NetBSD and Cygwin:

        with skip_enotty_error(self, 'tcsendbreak',
                               ('freebsd', 'netbsd', 'cygwin')):

This is the same failure as gh-124030 on NetBSD; Cygwin was added to the same skip in gh-149879.

Linked PRs

• gh-154394: Skip test_tcsendbreak on OpenBSD #154397
• [3.15] gh-154394: Skip test_tcsendbreak on OpenBSD (GH-154397) #154411
• [3.14] gh-154394: Skip test_tcsendbreak on OpenBSD (GH-154397) #154412
• [3.13] gh-154394: Skip test_tcsendbreak on OpenBSD (GH-154397) #154413