[PATCH v2] support_become_root: Don't fail when /proc/<pid/setgroups is missing

[Andreas Schwab]

On Nov 18 2017, Christian Brauner <christian.brauner@ubuntu.com> wrote:

> @@ -50,11 +51,21 @@ setup_uid_gid_mapping (uid_t original_uid, gid_t original_gid)
>    xwrite (fd, buf, ret);
>    xclose (fd);
>  
> -  /* Disable setgroups before mapping groups, otherwise that would
> -     fail with EPERM.  */
> -  fd = xopen ("/proc/self/setgroups", O_WRONLY, 0);
> -  xwrite (fd, "deny\n", strlen ("deny\n"));
> -  xclose (fd);
> +  /* Linux 3.19 introduced the setgroups file.  We need write "deny" to this
> +   * file otherwise writing to gid_map will fail with EPERM.  */

Wrong comment style.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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