From 235939e277edf5a01aeada1162191a82f10a03d3 Mon Sep 17 00:00:00 2001
From: ripsaw8080 <ripsaw8080@users.sourceforge.net>
Date: Fri, 13 Mar 2015 13:47:26 +0000
Subject: [PATCH] Attempting to unlink (delete) an existing device name returns
 an access denied error. Fixes EMM device driver detection, and thus
 SoundBlaster sound, in the Striker soccer game. Also add a log message for
 FindFirst.

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3905
---
 src/dos/dos_files.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/dos/dos_files.cpp b/src/dos/dos_files.cpp
index 2e0e5a79..a37b4cf8 100644
--- a/src/dos/dos_files.cpp
+++ b/src/dos/dos_files.cpp
@@ -309,6 +309,7 @@ bool DOS_Rename(char const * const oldname,char const * const newname) {
 }
 
 bool DOS_FindFirst(char * search,Bit16u attr,bool fcb_findfirst) {
+	LOG(LOG_FILES,LOG_NORMAL)("file search attributes %X name %s",attr,search);
 	DOS_DTA dta(dos.dta());
 	Bit8u drive;char fullsearch[DOS_PATHLENGTH];
 	char dir[DOS_PATHLENGTH];char pattern[DOS_PATHLENGTH];
@@ -633,6 +634,11 @@ bool DOS_OpenFileExtended(char const * name, Bit16u flags, Bit16u createAttr, Bi
 
 bool DOS_UnlinkFile(char const * const name) {
 	char fullname[DOS_PATHLENGTH];Bit8u drive;
+	// An existing device returns an access denied error
+	if (DOS_FindDevice(name) != DOS_DEVICES) {
+		DOS_SetError(DOSERR_ACCESS_DENIED);
+		return false;
+	}
 	if (!DOS_MakeName(name,fullname,&drive)) return false;
 	if(Drives[drive]->FileUnlink(fullname)){
 		return true;