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gh-90092: Fix test_curses when stdin is write-only (e.g. under nohup) by serhiy-storchaka · Pull Request #153420 · python/cpython · GitHub

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gh-90092: Fix test_curses when stdin is write-only (e.g. under nohup) #153420

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serhiy-storchaka merged 1 commit into from
Jul 9, 2026
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gh-90092: Fix test_curses when stdin is write-only (e.g. under nohup) #153420

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7 changes: 7 additions & 0 deletions Lib/test/test_curses.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,9 @@
except ImportError:
pass

# Only reachable once curses imported, so the platform has fcntl too.
import fcntl

def requires_curses_func(name):
return unittest.skipUnless(hasattr(curses, name),
'requires curses.%s' % name)
Expand Down Expand Up @@ -164,6 +167,10 @@ def setUp(self):
# ScreenTests run newterm()/set_term() in the same process.
try:
infd = sys.__stdin__.fileno()
if fcntl.fcntl(infd, fcntl.F_GETFL) & os.O_ACCMODE == os.O_WRONLY:
# newterm() needs a readable input fd; a write-only stdin
# (as nohup leaves for a backgrounded run) fails with EINVAL.
infd = stdout_fd
except (AttributeError, ValueError, OSError):
infd = stdout_fd
self.screen = curses.newterm(term, stdout_fd, infd)
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