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[3.13] gh-142836: Avoid /proc fd pipes on Solaris (GH-142853) #142855

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Merged
jaraco merged 1 commit into from
Dec 17, 2025
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[3.13] gh-142836: Avoid /proc fd pipes on Solaris (GH-142853) #142855

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gh-142836: Avoid /proc fd pipes on Solaris (GH-142853) 
(cherry picked from commit c35b812)

Co-authored-by: Jason R. Coombs <jaraco@jaraco.com>
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@jaraco @miss-islington
jaraco authored and miss-islington committed Dec 17, 2025
commit ec5c71fe0dca7b660797f924d4fe3826f7532f36
13 changes: 12 additions & 1 deletion Lib/test/test_pdb.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3072,10 +3072,22 @@ def _assert_find_function(self, file_content, func_name, expected):

def _fd_dir_for_pipe_targets(self):
"""Return a directory exposing live file descriptors, if any."""
return self._proc_fd_dir() or self._dev_fd_dir()

def _proc_fd_dir(self):
"""Return /proc-backed fd dir when it can be used for pipes."""
# GH-142836: Opening /proc/self/fd entries for pipes raises EACCES on
# Solaris, so prefer other mechanisms there.
if sys.platform.startswith("sunos"):
return None

proc_fd = "/proc/self/fd"
if os.path.isdir(proc_fd) and os.path.exists(os.path.join(proc_fd, '0')):
return proc_fd
return None

def _dev_fd_dir(self):
"""Return /dev-backed fd dir when usable."""
dev_fd = "/dev/fd"
if os.path.isdir(dev_fd) and os.path.exists(os.path.join(dev_fd, '0')):
if sys.platform.startswith("freebsd"):
Expand All @@ -3085,7 +3097,6 @@ def _fd_dir_for_pipe_targets(self):
except FileNotFoundError:
return None
return dev_fd

return None

def test_find_function_empty_file(self):
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Tests/2025-12-17-02-02-57.gh-issue-142836.mR-fvK.rst
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@@ -0,0 +1 @@
Accommodated Solaris in ``test_pdb.test_script_target_anonymous_pipe``.
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