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d6f356e1ab
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 f58873e4b2)
Co-authored-by: Itamar Oren <itamarost@gmail.com>
34 lines
858 B
Python
34 lines
858 B
Python
"""When called as a script, print a comma-separated list of the open
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file descriptors on stdout.
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Usage:
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fd_status.py: check all file descriptors (up to 255)
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fd_status.py fd1 fd2 ...: check only specified file descriptors
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"""
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import errno
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import os
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import stat
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import sys
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if __name__ == "__main__":
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fds = []
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if len(sys.argv) == 1:
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try:
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_MAXFD = os.sysconf("SC_OPEN_MAX")
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except:
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_MAXFD = 256
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test_fds = range(0, min(_MAXFD, 256))
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else:
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test_fds = map(int, sys.argv[1:])
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for fd in test_fds:
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try:
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st = os.fstat(fd)
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except OSError as e:
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if e.errno == errno.EBADF:
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continue
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raise
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# Ignore Solaris door files
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if not stat.S_ISDOOR(st.st_mode):
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fds.append(fd)
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print(','.join(map(str, fds)))
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