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Fix error code checking for SetFilePointer() call

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An error has occurred if the return value is invalid_set_file_pointer
and getlasterror doesn't return no_error.

Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fabien Chouteau 2012-12-10 12:56:22 +01:00 committed by Kevin Wolf
parent 473c7f0255
commit fbcad04d6b
1 changed files with 14 additions and 3 deletions
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17
block/raw-win32.c
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@ -303,13 +303,24 @@ static int raw_truncate(BlockDriverState *bs, int64_t offset)
{
BDRVRawState *s = bs->opaque;
LONG low, high;
DWORD dwPtrLow;
low = offset;
high = offset >> 32;
if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
return -EIO;
if (!SetEndOfFile(s->hfile))
/*
* An error has occurred if the return value is INVALID_SET_FILE_POINTER
* and GetLastError doesn't return NO_ERROR.
*/
dwPtrLow = SetFilePointer(s->hfile, low, &high, FILE_BEGIN);
if (dwPtrLow == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
fprintf(stderr, "SetFilePointer error: %d\n", GetLastError());
return -EIO;
}
if (SetEndOfFile(s->hfile) == 0) {
fprintf(stderr, "SetEndOfFile error: %d\n", GetLastError());
return -EIO;
}
return 0;
}