pub fn set_thread_groups(groups: &[Gid]) -> Result<()>Expand description
setgroups(groups)-Sets the supplementary group IDs for the calling
thread.
§Warning
This is not the setgroups you are looking for… POSIX requires gids to be
process granular, but on Linux they are per-thread. Thus, this call only
changes the gids for the current thread, not the entire process even
though that is in violation of the POSIX standard.
For details on this distinction, see the C library vs. kernel differences in the manual page. This call implements the kernel behavior.