End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
class method
Process::Sys.seteuid
Process::Sys.seteuid(user) → nil
process.c
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static VALUE
p_sys_seteuid(VALUE obj, VALUE id)
{
check_uid_switch();
if (seteuid(OBJ2UID(id)) != 0) rb_sys_fail(0);
return Qnil;
}
Set the effective user ID of the calling process to user. Not available on all platforms.