Function nix::unistd::setresgid

pub fn setresgid(rgid: Gid, egid: Gid, sgid: Gid) -> Result<()>

Sets the real, effective, and saved gid. (see setresuid(2))

• rgid: real group id
• egid: effective group id
• sgid: saved group id
• returns: Ok or libc error code.

Err is returned if the user doesn't have permission to set this GID.