From: Martin v. Löwis <martin@v.loewis.de>
Date: Mon, 6 Oct 2003 21:34:33 +0000 (+0000)
Subject: Patch #817329: Use SC_OPEN_MAX to determine MAXFD. Backported to 2.3.
X-Git-Tag: v2.4a1~1458
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f563c8bbac748e7ca9a1127c67831902bccaee02;p=python

Patch #817329: Use SC_OPEN_MAX to determine MAXFD. Backported to 2.3.
---

diff --git a/Lib/popen2.py b/Lib/popen2.py
index e8fff06e0b..ebb4ef6526 100644
--- a/Lib/popen2.py
+++ b/Lib/popen2.py
@@ -11,7 +11,10 @@ import sys
 
 __all__ = ["popen2", "popen3", "popen4"]
 
-MAXFD = 256     # Max number of file descriptors (os.getdtablesize()???)
+try:
+    MAXFD = os.sysconf('SC_OPEN_MAX')
+except (AttributeError, ValueError):
+    MAXFD = 256
 
 _active = []