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[3.14] gh-134954: Hard-cap max file descriptors in subprocess test fd_status (GH-134955) (#134980)

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gh-134954: Hard-cap max file descriptors in subprocess test fd_status (GH-134955)

* Hard-cap max file descriptors in subprocess test fd_status

On some systems, `SC_OPEN_MAX` may return a very large value (i.e. 10**30), leading to the subprocess test timing out (or run forever).
Prevent this situation by applying a hard cap on how many file descriptors are checked.

* Fix typo in usage docstring

s/fd_stats/fd_status/
(cherry picked from commit f58873e4b2b7aad8e3a08a6188c6eb08d0a3001b)

Co-authored-by: Itamar Oren <itamarost@gmail.com>
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Miss Islington (bot) 2025-05-31 16:55:03 +02:00 committed by GitHub
parent 0df99207b3
commit d6f356e1ab
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1 changed files with 2 additions and 2 deletions
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Lib/test/subprocessdata/fd_status.py
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@ -2,7 +2,7 @@
file descriptors on stdout.
Usage:
fd_stats.py: check all file descriptors
fd_status.py: check all file descriptors (up to 255)
fd_status.py fd1 fd2 ...: check only specified file descriptors
"""
@ -18,7 +18,7 @@ if __name__ == "__main__":
_MAXFD = os.sysconf("SC_OPEN_MAX")
except:
_MAXFD = 256
test_fds = range(0, _MAXFD)
test_fds = range(0, min(_MAXFD, 256))
else:
test_fds = map(int, sys.argv[1:])
for fd in test_fds: