While testing my tempfile.py rewrite I ran into this mess in os.py:
def _execvpe(file, args, env=None):
# ...
if not _notfound:
if sys.platform[:4] == 'beos':
# Process handling (fork, wait) under BeOS (up to 5.0)
# doesn't interoperate reliably with the thread interlocking
# that happens during an import. The actual error we need
# is the same on BeOS for posix.open() et al., ENOENT.
try: unlink('/_#.# ## #.#')
except error, _notfound: pass
else:
import tempfile
t = tempfile.mktemp()
# Exec a file that is guaranteed not to exist
try: execv(t, ('blah',))
except error, _notfound: pass
exc, arg = error, _notfound
for dir in PATH:
fullname = path.join(dir, file)
try:
apply(func, (fullname,) + argrest)
except error, (errno, msg):
if errno != arg[0]:
exc, arg = error, (errno, msg)
raise exc, arg
This appears to be an overcomplicated, unreliable way of writing
import errno
def _execvpe(file, args, env=None):
# ...
for dir in PATH:
fullname = path.join(dir, file)
try:
apply(func, (fullname,) + argrest)
except error, (err, msg):
if err != errno.ENOENT: # and err != errno.ENOTDIR, maybe
raise
raise error, (err, msg)
Can anyone explain why it is done this way?
zw
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