From 682853da42fd342f19f74625b07dd581cb9c6c5a Mon Sep 17 00:00:00 2001
From: asvitkine <>
Date: Fri, 20 Jun 2008 00:39:47 +0000
Subject: [PATCH] [patch from Kelvin Delbarre] Fix file corruption experienced
 when doing random-access file I/O to the external filesystem. The
 application-specified ioPosMode parameter must be masked off appropriately in
 extfs.cpp:fs_set_fpos(), as is done elsewhere in the file.

---
 BasiliskII/src/extfs.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/BasiliskII/src/extfs.cpp b/BasiliskII/src/extfs.cpp
index 012692fa..f4abaaf8 100644
--- a/BasiliskII/src/extfs.cpp
+++ b/BasiliskII/src/extfs.cpp
@@ -1800,7 +1800,7 @@ static int16 fs_set_fpos(uint32 pb)
 			return fnOpnErr;
 
 	// Set file position
-	switch (ReadMacInt16(pb + ioPosMode)) {
+	switch (ReadMacInt16(pb + ioPosMode) & 3) {
 		case fsFromStart:
 			if (lseek(fd, ReadMacInt32(pb + ioPosOffset), SEEK_SET) < 0)
 				return posErr;