Re: [Qemu-devel] [PATCH 2/2] Allow -runas to be specified as UID:GID as well as USERNAME

[Avi Kivity <avi@redhat.com>]

On 11/24/2011 06:46 PM, Avi Kivity wrote:
> On 11/24/2011 06:29 PM, Chris Webb wrote:
> > This allows qemu to drop privileges to a dynamically allocated, anonymous UID
> > and GID without needing a temporary /etc/passwd entry for that UID. The
> > UID:GID format is very standard, being (for example) the syntax used by
> > chown(1) for numeric IDs.
>
> > @@ -179,6 +179,15 @@ void os_parse_cmd_args(int index, const char *optarg)
> >      case QEMU_OPTION_runas:
> >          user_pwd = getpwnam(optarg);
> >          if (!user_pwd) {
> > +            long uid, gid, tail;
> > +            if (sscanf(optarg, "%ld:%ld%ln", &uid, &gid, &tail) >= 2
> > +                  && !optarg[tail]) {
> > +                user_pwd = g_malloc0(sizeof(user_pwd));
>
> g_new0() please.

In fact this is a bug - you allocate a pointer instead of a struct passwd.

-- 
error compiling committee.c: too many arguments to function