Function nc::getgroups

source · 
pub unsafe fn getgroups(
    size: i32,
    group_list: &mut [gid_t]
) -> Result<i32, Errno>
Expand description

Get list of supplementary group Ids.

§Example

let mut groups = vec![];
let ret = unsafe { nc::getgroups(0, &mut groups) };
assert!(ret.is_ok());
let total_num = ret.unwrap();
groups.resize(total_num as usize, 0);

let ret = unsafe { nc::getgroups(total_num, &mut groups) };
assert!(ret.is_ok());
assert_eq!(ret, Ok(total_num));