fix giampaolo#607: DUPLEX_UNKNOWN is not defined on old RedHat versions

mrjefftang · Mar 14, 2015 · 1a5e238 · 1a5e238
1 parent 772d730
commit 1a5e238
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/psutil/_psutil_linux.c b/psutil/_psutil_linux.c
@@ -51,6 +51,12 @@ enum {
     IOPRIO_WHO_PROCESS = 1,
 };
 
+// May happen on old RedHat versions, see:
+// https://github.com/giampaolo/psutil/issues/607
+#ifndef DUPLEX_UNKNOWN
+    #define DUPLEX_UNKNOWN 0xff
+#endif
+
 static inline int
 ioprio_get(int which, int who)
 {