X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Frts%2FRtsUtils.c;h=6ff4f72109efd14f8caab9e0ed869c0eaefa1fff;hb=dc801dc275fb8f81d482535b4d6317e234bb10f8;hp=9637db0c98e69052339f7f0cb3acd707944bf419;hpb=cffcb52b7b7518db39d64394270392d06215cf90;p=ghc-hetmet.git

diff --git a/ghc/rts/RtsUtils.c b/ghc/rts/RtsUtils.c
index 9637db0..6ff4f72 100644
--- a/ghc/rts/RtsUtils.c
+++ b/ghc/rts/RtsUtils.c
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: RtsUtils.c,v 1.35 2003/08/22 22:24:16 sof Exp $
+ * $Id: RtsUtils.c,v 1.36 2003/10/21 11:51:15 stolz Exp $
  *
  * (c) The GHC Team, 1998-2002
  *
@@ -249,7 +249,9 @@ setNonBlockingFd(int fd)
 
   /* clear the non-blocking flag on this file descriptor */
   fd_flags = fcntl(fd, F_GETFL);
-  fcntl(fd, F_SETFL, fd_flags | O_NONBLOCK);
+  if (!(fd_flags & O_NONBLOCK)) {
+    fcntl(fd, F_SETFL, fd_flags | O_NONBLOCK);
+  }
 }
 #else
 /* Stub defns -- async / non-blocking IO is not done