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

f563c8bb · Martin v. Löwis · 0a4a50dd · f563c8bb
Commit f563c8bb authored Oct 06, 2003 by Martin v. Löwis
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Lib/popen2.py Lib/popen2.py +4 -1

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--- 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 = []