.th GETTY VIII 4/4/78 .sh NAME getty \*- set typewriter mode .sh SYNOPSIS .mc | .bd /etc/getty tty_id tty_type .fl .mc .sh DESCRIPTION .it Getty is invoked by .it init (VIII) immediately after a typewriter is opened following a dial-up. It reads the user's name and password, .mc | and then invokes the user's shell program. .mc While reading the name .it getty attempts to adapt the system to the speed and type of terminal being used. .s3 .mc | .it Init calls .it getty with two arguments specified by the .it ttys file entry, the first for the typewriter line, and the second for the probable tty type. .mc Types other than `0' can be used to make .it getty treat the line specially. .s3 Normally, it sets the speed of the interface to 300 baud, specifies that raw mode is to be used (break on every character), that echo is to be suppressed, and either parity allowed. It types the ``login:'' message, which includes the characters which put the Terminet 300 terminal into full-duplex and return the GSI terminal to non-graphic mode. Then the user's name is read, a character at a time. If a null character is received, it is assumed to be the result of the user pushing the ``break'' (``interrupt'') key. The speed is then changed to 150 baud and the ``login:'' is typed again, this time including the character sequence which puts a Teletype 37 into full-duplex. If a subsequent null character is received, the speed is changed back to 300 baud. .s3 The user's name is terminated by a new-line or carriage-return character. The latter results in the system being set to treat carriage returns appropriately (see .it stty (II)). .s3 The user's 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. .mc | The name is then validated in the .it /etc/passwd file and a password requested. If all is ok, the user limits structure is set up, accounting files are updated, and the user is informed of the date and time and the existence of .it .mail and message-of-the-day files. .it Getty initializes the working directory, then executes a command interpreter (usually .it sh (I)) according to specifications found in the password file. .fl .mc .sh FILES .mc | /etc/utmp accounting .br /usr/adm/wtmp accounting .br .li .mail mail .br /etc/motd message-of-the-day .br /etc/passwd password file .fl .mc .sh "SEE ALSO" .mc | mail (I), passwd (I), .br stty (II), .br passwd (V), .br init (VIII), AUSAM (VIII), .fl .mc .sh DIAGNOSTICS .mc | `Who?' if the name is unknown. .br `Wrong password'. .br `No Shell,', `cannot open password file,' `no directory': consult a UNIX programming counselor. .mc .sh BUGS