SetFilePointer returns INVALID_SET_FILE_POINTER when it fails.
In addition, GetLastError must be checked.
The first call of SetFilePointer did not use INVALID_SET_FILE_POINTER,
the second call used wrong error handling.
Signed-off-by: Stefan Weil <w...@mail.berlios.de>
---
block/raw-win32.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/block/raw-win32.c b/block/raw-win32.c
index e47cfe0..b7dd357 100644
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -41,6 +41,7 @@ typedef struct BDRVRawState {
int qemu_ftruncate64(int fd, int64_t length)
{
LARGE_INTEGER li;
+ DWORD dw;
LONG high;
HANDLE h;
BOOL res;
@@ -53,12 +54,15 @@ int qemu_ftruncate64(int fd, int64_t length)
/* get current position, ftruncate do not change position */
li.HighPart = 0;
li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
- if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
+ if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
return -1;
+ }
high = length >> 32;
- if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
+ dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN);
+ if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
return -1;
+ }
res = SetEndOfFile(h);
/* back to old position */
--
1.7.2.5
