Allow VM_Restart to load unpure qagame.qvm so that local server won't crash after map_restart if server operator has qagame.qvm residing outside pak file (#5196) Thanks to "rg3" for providing a shell account

3 files changed, 26 insertions, 20 deletions

diff --git a/src/qcommon/files.c b/src/qcommon/files.c
index 94779b90..7fc209e9 100644
--- a/src/qcommon/files.c
+++ b/src/qcommon/files.c
@@ -1054,7 +1054,7 @@ Returns filesize and an open FILE pointer.
 */
 extern qboolean		com_fullyInitialized;
 
-long FS_FOpenFileReadDir(const char *filename, searchpath_t *search, fileHandle_t *file, qboolean uniqueFILE)
+long FS_FOpenFileReadDir(const char *filename, searchpath_t *search, fileHandle_t *file, qboolean uniqueFILE, qboolean unpure)
 {
 	long			hash;
 	pack_t		*pak;
@@ -1152,7 +1152,7 @@ long FS_FOpenFileReadDir(const char *filename, searchpath_t *search, fileHandle_
 		if(search->pack->hashTable[hash])
 		{
 			// disregard if it doesn't match one of the allowed pure pak files
-			if(!FS_PakIsPure(search->pack))
+			if(!unpure && !FS_PakIsPure(search->pack))
 			{
 				*file = 0;
 				return -1;
@@ -1243,7 +1243,7 @@ long FS_FOpenFileReadDir(const char *filename, searchpath_t *search, fileHandle_
 		//   this test can make the search fail although the file is in the directory
 		// I had the problem on https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=8
 		// turned out I used FS_FileExists instead
-		if(fs_numServerPaks)
+		if(!unpure && fs_numServerPaks)
 		{
 			if(!FS_IsExt(filename, ".cfg", len) &&		// for config files
 			   !FS_IsExt(filename, ".menu", len) &&		// menu files
@@ -1303,7 +1303,7 @@ long FS_FOpenFileRead(const char *filename, fileHandle_t *file, qboolean uniqueF
 
 	for(search = fs_searchpaths; search; search = search->next)
 	{
-	        len = FS_FOpenFileReadDir(filename, search, file, uniqueFILE);
+	        len = FS_FOpenFileReadDir(filename, search, file, uniqueFILE, qfalse);
 	        
 	        if(file == NULL)
 	        {
@@ -1387,7 +1387,7 @@ vmInterpret_t FS_FindVM(void **startSearch, char *found, int foundlen, const cha
 				}
 			}
 
-			if(FS_FOpenFileReadDir(qvmName, search, NULL, qfalse) > 0)
+			if(FS_FOpenFileReadDir(qvmName, search, NULL, qfalse, qfalse) > 0)
 			{
 				*startSearch = search;
 				return VMI_COMPILED;
@@ -1409,7 +1409,7 @@ vmInterpret_t FS_FindVM(void **startSearch, char *found, int foundlen, const cha
                                 }
 		        }
 
-			if(FS_FOpenFileReadDir(qvmName, search, NULL, qfalse) > 0)
+			if(FS_FOpenFileReadDir(qvmName, search, NULL, qfalse, qfalse) > 0)
 			{
 				*startSearch = search;
 
@@ -1714,7 +1714,7 @@ a null buffer will just return the file length without loading
 If searchPath is non-NULL search only in that specific search path
 ============
 */
-long FS_ReadFileDir(const char *qpath, void *searchPath, void **buffer)
+long FS_ReadFileDir(const char *qpath, void *searchPath, qboolean unpure, void **buffer)
 {
 	fileHandle_t	h;
 	searchpath_t	*search;
@@ -1787,7 +1787,7 @@ long FS_ReadFileDir(const char *qpath, void *searchPath, void **buffer)
 	else
 	{
 		// look for it in a specific search path only
-		len = FS_FOpenFileReadDir(qpath, search, &h, qfalse);
+		len = FS_FOpenFileReadDir(qpath, search, &h, qfalse, unpure);
 	}
 
 	if ( h == 0 ) {
@@ -1846,7 +1846,7 @@ a null buffer will just return the file length without loading
 */
 long FS_ReadFile(const char *qpath, void **buffer)
 {
-	return FS_ReadFileDir(qpath, NULL, buffer);
+	return FS_ReadFileDir(qpath, NULL, qfalse, buffer);
 }
 
 /*
@@ -2713,7 +2713,7 @@ qboolean FS_Which(const char *filename, void *searchPath)
 {
 	searchpath_t *search = searchPath;
 
-	if(FS_FOpenFileReadDir(filename, search, NULL, qfalse) > 0)
+	if(FS_FOpenFileReadDir(filename, search, NULL, qfalse, qfalse) > 0)
 	{
 		if(search->pack)
 		{
diff --git a/src/qcommon/qcommon.h b/src/qcommon/qcommon.h
index caabf7f4..746376fb 100644
--- a/src/qcommon/qcommon.h
+++ b/src/qcommon/qcommon.h
@@ -342,7 +342,7 @@ void	VM_Free( vm_t *vm );
 void	VM_Clear(void);
 void	VM_Forced_Unload_Start(void);
 void	VM_Forced_Unload_Done(void);
-vm_t	*VM_Restart( vm_t *vm );
+vm_t	*VM_Restart(vm_t *vm, qboolean unpure);
 
 intptr_t		QDECL VM_Call( vm_t *vm, int callNum, ... );
 
@@ -644,7 +644,7 @@ int		FS_Read( void *buffer, int len, fileHandle_t f );
 void	FS_FCloseFile( fileHandle_t f );
 // note: you can't just fclose from another DLL, due to MS libc issues
 
-long	FS_ReadFileDir(const char *qpath, void *searchPath, void **buffer);
+long	FS_ReadFileDir(const char *qpath, void *searchPath, qboolean unpure, void **buffer);
 long	FS_ReadFile(const char *qpath, void **buffer);
 // returns the length of the file
 // a null buffer will just return the file length without loading
diff --git a/src/qcommon/vm.c b/src/qcommon/vm.c
index 90af748f..6113901d 100644
--- a/src/qcommon/vm.c
+++ b/src/qcommon/vm.c
@@ -364,7 +364,8 @@ VM_LoadQVM
 Load a .qvm file
 =================
 */
-vmHeader_t *VM_LoadQVM( vm_t *vm, qboolean alloc ) {
+vmHeader_t *VM_LoadQVM( vm_t *vm, qboolean alloc, qboolean unpure)
+{
 	int					dataLength;
 	int					i;
 	char				filename[MAX_QPATH];
@@ -377,7 +378,7 @@ vmHeader_t *VM_LoadQVM( vm_t *vm, qboolean alloc ) {
 	Com_sprintf( filename, sizeof(filename), "vm/%s.qvm", vm->name );
 	Com_Printf( "Loading vm file %s...\n", filename );
 
-	FS_ReadFileDir(filename, vm->searchPath, &header.v);
+	FS_ReadFileDir(filename, vm->searchPath, unpure, &header.v);
 
 	if ( !header.h ) {
 		Com_Printf( "Failed.\n" );
@@ -523,9 +524,13 @@ VM_Restart
 
 Reload the data, but leave everything else in place
 This allows a server to do a map_restart without changing memory allocation
+
+We need to make sure that servers can access unpure QVMs (not contained in any pak)
+even if the client is pure, so take "unpure" as argument.
 =================
 */
-vm_t *VM_Restart( vm_t *vm ) {
+vm_t *VM_Restart(vm_t *vm, qboolean unpure)
+{
 	vmHeader_t	*header;
 
 	// DLL's can't be restarted in place
@@ -543,15 +548,16 @@ vm_t *VM_Restart( vm_t *vm ) {
 	}
 
 	// load the image
-	Com_Printf( "VM_Restart()\n" );
+	Com_Printf("VM_Restart()\n");
 
-	if( !( header = VM_LoadQVM( vm, qfalse ) ) ) {
-		Com_Error( ERR_DROP, "VM_Restart failed" );
+	if(!(header = VM_LoadQVM(vm, qfalse, unpure)))
+	{
+		Com_Error(ERR_DROP, "VM_Restart failed");
 		return NULL;
 	}
 
 	// free the original file
-	FS_FreeFile( header );
+	FS_FreeFile(header);
 
 	return vm;
 }
@@ -622,7 +628,7 @@ vm_t *VM_Create( const char *module, intptr_t (*systemCalls)(intptr_t *),
 		else if(retval == VMI_COMPILED)
 		{
 			vm->searchPath = startSearch;
-			if((header = VM_LoadQVM(vm, qtrue)))
+			if((header = VM_LoadQVM(vm, qtrue, qfalse)))
 				break;
 
 			// VM_Free overwrites the name on failed load