From a72067fab98c6ecbf701a34f49baa767f04b8c7b Mon Sep 17 00:00:00 2001
From: eccles <eccles@212acab6-be3b-0410-9dea-997c60f758d6>
Date: Sun, 28 Sep 2003 11:33:22 +0000
Subject: [PATCH] No more Windows error message when using IfFileExists on a
 removable drive with no media inserted.

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@2975 212acab6-be3b-0410-9dea-997c60f758d6
---
 Source/exehead/exec.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Source/exehead/exec.c b/Source/exehead/exec.c
index 0d6ef8d9..a8d0e82a 100644
--- a/Source/exehead/exec.c
+++ b/Source/exehead/exec.c
@@ -263,7 +263,12 @@ static int NSISCALL ExecuteEntry(entry *entry_)
     case EW_IFFILEEXISTS:
     {
       char *buf0=GetStringFromParm(0x00);
-      if (file_exists(buf0))
+      WIN32_FIND_DATA *fd;
+      // Avoid a "There is no disk in the drive" error box on empty removable drives
+      SetErrorMode(SEM_NOOPENFILEERRORBOX | SEM_FAILCRITICALERRORS);
+      fd = file_exists(buf0);
+      SetErrorMode(0);
+      if (fd)
       {
         log_printf3("IfFileExists: file \"%s\" exists, jumping %d",buf0,parm1);
         return parm1;
@@ -744,7 +749,7 @@ static int NSISCALL ExecuteEntry(entry *entry_)
         c->bkb = CreateBrushIndirect(&c->bk);
 
       c->flags &= ~(CC_BK_SYS|CC_TEXT_SYS|CC_BKB);
-      
+
       SetWindowLong((HWND) GetIntFromParm(0), GWL_USERDATA, (long) c);
     }
     break;