Hi

On Wed, Jul 7, 2021 at 9:33 PM Steve Sistare <steven.sistare@oracle.com>
wrote:

> Define qemu_clr_cloexec, analogous to qemu_set_cloexec.
>
> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
> ---
>  include/qemu/osdep.h | 1 +
>  util/oslib-posix.c   | 9 +++++++++
>  util/oslib-win32.c   | 4 ++++
>  3 files changed, 14 insertions(+)
>
> diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
> index c91a78b..3d6a6ca 100644
> --- a/include/qemu/osdep.h
> +++ b/include/qemu/osdep.h
> @@ -637,6 +637,7 @@ static inline void qemu_timersub(const struct timeval
> *val1,
>  #endif
>
>  void qemu_set_cloexec(int fd);
> +void qemu_clr_cloexec(int fd);
>

I wish we would have a single function to set or unset, tbh. (as _clr_
isn't as readable to me)

 /* Starting on QEMU 2.5, qemu_hw_version() returns "2.5+" by default
>   * instead of QEMU_VERSION, so setting hw_version on MachineClass
> diff --git a/util/oslib-posix.c b/util/oslib-posix.c
> index e8bdb02..97577f1 100644
> --- a/util/oslib-posix.c
> +++ b/util/oslib-posix.c
> @@ -309,6 +309,15 @@ void qemu_set_cloexec(int fd)
>      assert(f != -1);
>  }
>
> +void qemu_clr_cloexec(int fd)
> +{
> +    int f;
> +    f = fcntl(fd, F_GETFD);
> +    assert(f != -1);
> +    f = fcntl(fd, F_SETFD, f & ~FD_CLOEXEC);
> +    assert(f != -1);
> +}
>

(asserting() may not be very judicious for calls that we intend to make
during running time, but that's the way it is so far)

+
>  /*
>   * Creates a pipe with FD_CLOEXEC set on both file descriptors
>   */
> diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> index af559ef..46e94d9 100644
> --- a/util/oslib-win32.c
> +++ b/util/oslib-win32.c
> @@ -265,6 +265,10 @@ void qemu_set_cloexec(int fd)
>  {
>  }
>
> +void qemu_clr_cloexec(int fd)
> +{
> +}
> +
>  /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
>  #define _W32_FT_OFFSET (116444736000000000ULL)
>
> --
> 1.8.3.1
>
>
>

-- 
Marc-André Lureau