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closes bpo-27805: Ignore ESPIPE in initializing seek of append-mode files. (GH-17112)

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This change, which follows the behavior of C stdio's fdopen and Python 2's file object, allows pipes to be opened in append mode.
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Benjamin Peterson 2019-11-12 14:51:34 -08:00 • committed by GitHub
parent d593881505
commit 74fa9f723f
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4 changed files with 33 additions and 10 deletions
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6
Lib/_pyio.py
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@ -1577,7 +1577,11 @@ class FileIO(RawIOBase):
# For consistent behaviour, we explicitly seek to the
# end of file (otherwise, it might be done only on the
# first write()).
os.lseek(fd, 0, SEEK_END)
try:
os.lseek(fd, 0, SEEK_END)
except OSError as e:
if e.errno != errno.ESPIPE:
raise
except:
if owned_fd is not None:
os.close(owned_fd)