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ttys(5) [v7 man page]

TTYS(5) 							File Formats Manual							   TTYS(5)

NAME
ttys - terminal initialization data DESCRIPTION
The ttys file is read by the init program and specifies which terminal special files are to have a process created for them which will allow people to log in. It contains one line per special file. 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 call- ing login. For normal lines, the character is `0'; other characters can be used, for example, with hard-wired terminals where speed recog- nition 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. FILES
/etc/ttys SEE ALSO
init(8), getty(8), login(1) TTYS(5)

Check Out this Related Man Page

GETTY(8)						      System Manager's Manual							  GETTY(8)

NAME
getty - set typewriter mode SYNOPSIS
/etc/getty [ char ] DESCRIPTION
Getty is invoked by init(8) immediately after a typewriter is opened following a dial-up. It reads the user's login name and calls login(1) with the name as argument. While reading the name getty attempts to adapt the system to the speed and type of terminal being used. Init calls getty with a single character argument taken from the ttys(5) file entry for the terminal line. This argument determines a sequence of line speeds through which getty cycles, and also the `login:' greeting message, which can contain character sequences to put various kinds of terminals in useful states. The user's name is terminated by a new-line or carriage-return character. In the second case CRMOD mode is set (see ioctl(2)). The name is scanned to see if it contains any lower-case alphabetic characters; if not, and if the name is nonempty, the system is told to map any future upper-case characters into the corresponding lower-case characters. If the terminal's `break' key is depressed, getty cycles to the next speed appropriate to the type of line and prints the greeting message again. Finally, login is called with the user's name as argument. The following arguments from the ttys file are understood. 0 Cycles through 300-1200-150-110 baud. Useful as a default for dialup lines accessed by a variety of terminals. - Intended for an on-line Teletype model 33, for example an operator's console. 1 Optimized for a 150-baud Teletype model 37. 2 Intended for an on-line 9600-baud terminal, for example the Textronix 4104. 3 Starts at 1200 baud, cycles to 300 and back. Useful with 212 datasets where most terminals run at 1200 speed. 5 Same as `3' but starts at 300. 4 Useful for on-line console DECwriter (LA36). SEE ALSO
init(8), login(1), ioctl(2), ttys(5) GETTY(8)
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