[PATCH] Tools: hv: fix file overwriting of hv_fcopy_daemon

[Yue Zhang (OSTC DEV)]

> -----Original Message-----
> From: KY Srinivasan
> > -----Original Message-----
> > From: Yue Zhang [mailto:yuezha at microsoft.com]
> > hv_fcopy_daemon fails to overwrite a file if the target file already exits.
> >
> > Add O_TRUNC flag on opening.
> >
> > Signed-off-by: Yue Zhang <yuezha at microsoft.com>
> > ---
> >  tools/hv/hv_fcopy_daemon.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/hv/hv_fcopy_daemon.c b/tools/hv/hv_fcopy_daemon.c
> > index fba1c75..01eee6b 100644
> > --- a/tools/hv/hv_fcopy_daemon.c
> > +++ b/tools/hv/hv_fcopy_daemon.c
> > @@ -88,7 +88,8 @@ static int hv_start_fcopy(struct hv_start_fcopy
> > *smsg)  }  }
> >
> > -target_fd = open(target_fname, O_RDWR | O_CREAT | O_CLOEXEC, 0744);
> > +target_fd = open(target_fname,
> > +O_RDWR | O_CREAT | O_TRUNC |
> Please align O_RDWR to align with the first argument (target_fname).
Thanks. I will fix it. 
> 
> K. Y
>