pub fn getgrouplist(user: &CStr, group: Gid) -> Result<Vec<Gid>>Expand description
Calculate the supplementary group access list.
Gets the group IDs of all groups that user is a member of. The additional
group group is also added to the list.
Note: This function is not available for Apple platforms. On those
platforms, checking group membership should be achieved via communication
with the opendirectoryd service.
ยงErrors
Although the getgrouplist() call does not return any specific
errors on any known platforms, this implementation will return a system
error of EINVAL if the number of groups to be fetched exceeds the
NGROUPS_MAX sysconf value. This mimics the behaviour of getgroups()
and setgroups(). Additionally, while some implementations will return a
partial list of groups when NGROUPS_MAX is exceeded, this implementation
will only ever return the complete list or else an error.