Re: [Qemu-devel] [PATCH v2] virtfs-proxy-helper: check return code of setfsgid/setfsuid

[Stefan Weil]

Am 10.10.2012 18:19, schrieb Paolo Bonzini:
> Fixes the following error with glibc 2.16 on Fedora 18:
>
> virtfs-proxy-helper.c: In function ‘setfsugid’:
> virtfs-proxy-helper.c:293:13: error: ignoring return value of ‘setfsgid’, 
> declared with attribute warn_unused_result [-Werror=unused-result]
> virtfs-proxy-helper.c:294:13: error: ignoring return value of ‘setfsuid’, 
> declared with attribute warn_unused_result [-Werror=unused-result]
> cc1: all warnings being treated as errors
>
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
>   fsdev/virtfs-proxy-helper.c | 8 ++++++--
>   1 file modificato, 6 inserzioni(+), 2 rimozioni(-)
>
> diff --git a/fsdev/virtfs-proxy-helper.c b/fsdev/virtfs-proxy-helper.c
> index f9a8270..9060743 100644
> --- a/fsdev/virtfs-proxy-helper.c
> +++ b/fsdev/virtfs-proxy-helper.c
> @@ -290,8 +290,12 @@ static int setfsugid(int uid, int gid)
>           CAP_DAC_OVERRIDE,
>       };
>   
> -    setfsgid(gid);
> -    setfsuid(uid);
> +    if (setfsgid(gid) < 0) {
> +        return -1;
> +    }
> +    if (setfsuid(uid) < 0) {
> +        return -1;
> +    }
>   
>       if (uid != 0 || gid != 0) {
>           return do_cap_set(cap_list, ARRAY_SIZE(cap_list), 0);

You are too fast for me :-)

Patch v3 is needed, see my other mail.

Stefan