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Issue #11459: A bufsize value of 0 in subprocess.Popen() really creates

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unbuffered pipes, such that select() works properly on them.
This commit is contained in:
Antoine Pitrou 2011-03-19 17:04:13 +01:00
commit 7b98d02302
6 changed files with 24 additions and 5 deletions
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4
Lib/os.py
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@ -779,11 +779,13 @@ if not _exists("urandom"):
return bs
# Supply os.popen()
def popen(cmd, mode="r", buffering=None):
def popen(cmd, mode="r", buffering=-1):
if not isinstance(cmd, str):
raise TypeError("invalid cmd type (%s, expected string)" % type(cmd))
if mode not in ("r", "w"):
raise ValueError("invalid mode %r" % mode)
if buffering == 0 or buffering == None:
raise ValueError("popen() does not support unbuffered streams")
import subprocess, io
if mode == "r":
proc = subprocess.Popen(cmd,