On 11/06/2014 07:44 AM, kuangjiou wrote:
> Hello,everyone!
> I am learning how to use the selinux userspace apps recent.And I got Segmentation fault when I use the avc_context_to_sid() funtion, dose anyone know how to resolve this problem? Thank you very much!
>
> The following is my testing code with avc_context_to_sid() funtion
>
> #include <selinux/selinux.h>
> #include <selinux/avc.h>
> #include <stdlib.h>
> #include <stdio.h>
>
> int main()
> {
> const char *scon = "system_u:object_r:unconfined_t";
> security_id_t sid;
> sid->ctx = scon;
> sid->refcnt = 28;
>
> avc_context_to_sid(scon, &sid);
>
> return 0;
> }
Must be preceded by a call to avc_init() or avc_open(). In current
libselinux, that is asserted on entry to the function.
However, I'd encourage you to consider using selinux_check_access()
instead for SELinux userspace object managers; it internally handles
calling avc_init() and avc_context_to_sid() as well as mapping class and
permission strings to numbers, making it much easier to use the AVC from
userspace. We have been using it in the Android userspace.
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