From 41c3069f7cf28155f8e6cfe0c10a12a1f5f76c7d Mon Sep 17 00:00:00 2001
From: Mark Vytlacil <mrv@wi.rr.com>
Date: Thu, 1 Nov 2007 21:05:43 +0200
Subject: [PATCH] XFree86: Input: Save/restore errno around SIGIO (bug #10683)

Make sure errno is saved and restored from the SIGIO handler, so errors
from system calls in input handlers don't break the interrupted code.
---
 hw/xfree86/common/xf86Events.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/xfree86/common/xf86Events.c b/hw/xfree86/common/xf86Events.c
index 785815c6a..e88fc3b3e 100644
--- a/hw/xfree86/common/xf86Events.c
+++ b/hw/xfree86/common/xf86Events.c
@@ -510,12 +510,14 @@ static void
 xf86SigioReadInput(int fd,
 		   void *closure)
 {
+    int errno_save = errno;
     int sigstate = xf86BlockSIGIO();
     InputInfoPtr pInfo = (InputInfoPtr) closure;
 
     pInfo->read_input(pInfo);
 
     xf86UnblockSIGIO(sigstate);
+    errno = errno_save;
 }
 
 /*