The first character of a line is either `0' or `1'; the former causes the line to be ignored, the latter causes it to be effective. The second character is used as an argument to getty(8), which performs such tasks as baud-rate recognition, reading the login name, and calling login. For normal lines, the character is `0'; other characters can be used, for example, with hard-wired terminals where speed recognition is unnecessary or which have special characteristics. (Getty will have to be fixed in such cases.) The remainder of the line is the terminal's entry in the device directory, /dev.