# HG changeset patch
# User Joachim Schmitz <jojo@schmitz-digital.de>
# Date 1347518484 -7200
# Node ID 723cfa7546c0e49a7f98dc929d125c0663361cc5
# Parent  1ba58228acdad5c9bd03debe0327f8ddbe08b1bc
poll: fix poll(0, NULL, msec)

* lib/poll.c: don't exit early if NULL is the 1st arg to poll(),
but nfd is 0.  In that case poll should behave like select.

Copyright-paperwork-exempt: yes

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2012-09-13  Joachim Schmitz <jojo@schmitz-digital.de>  (tiny change)
+
+	poll: fix poll(0, NULL, msec)
+	* lib/poll.c: don't exit early if NULL is the 1st arg to poll(),
+	but nfd is 0.  In that case poll should behave like select.
+
 2012-09-13  Joachim Schmitz <jojo@schmitz-digital.de>  (tiny change)
 	    Paolo Bonzini <bonzini@gnu.org>
 
diff --git a/lib/poll.c b/lib/poll.c
--- a/lib/poll.c
+++ b/lib/poll.c
@@ -354,7 +354,7 @@
 
   /* EFAULT is not necessary to implement, but let's do it in the
      simplest case. */
-  if (!pfd)
+  if (!pfd && nfd)
     {
       errno = EFAULT;
       return -1;