Function libfuse_sys::fuse_getgroups

pub unsafe extern "C" fn fuse_getgroups(size: c_int, list: *mut gid_t) -> c_int

Get the current supplementary group IDs for the current request

Similar to the getgroups(2) system call, except the return value is always the total number of group IDs, even if it is larger than the specified size.

The current fuse kernel module in linux (as of 2.6.30) doesn't pass the group list to userspace, hence this function needs to parse "/proc/$TID/task/$TID/status" to get the group IDs.

This feature may not be supported on all operating systems. In such a case this function will return -ENOSYS.

@param size size of given array @param list array of group IDs to be filled in @return the total number of supplementary group IDs or -errno on failure