Eryk Sun <[email protected]> added the comment:
> So, two interesting questions: does this in fact match the behavior of
> os._execvpe, and does it match the behavior of the shell?
I think it's fine. child_exec() tries all paths. It saves the first error
that's not ENOENT or ENOTDIR. The saved error gets reported back, else ENOENT
or ENOTDIR. This is the same as os._execvpe:
for dir in path_list:
fullname = path.join(dir, file)
try:
exec_func(fullname, *argrest)
except (FileNotFoundError, NotADirectoryError) as e:
last_exc = e
except OSError as e:
last_exc = e
if saved_exc is None:
saved_exc = e
if saved_exc is not None:
raise saved_exc
raise last_exc
Perhaps the rule for PATH search errors should be documented for os.execvp[e]
and subprocess.
I think it matches the shell, except, AFAIK, the shell doesn't distinguish
ENOENT and ENOTDIR errors. For example, where "/noexec" is a directory that has
no execute access:
$ /bin/sh -c spam
/bin/sh: 1: spam: not found
$ PATH=/noexec:$PATH /bin/sh -c spam
/bin/sh: 1: spam: Permission denied
----------
assignee: -> docs@python
components: +Documentation, Library (Lib)
nosy: +docs@python
versions: +Python 3.10, Python 3.8, Python 3.9 -Python 3.5
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<https://bugs.python.org/issue25481>
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