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getty(8) [bsd man page]

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

NAME
getty - set terminal mode SYNOPSIS
getty [ type [ tty ] ] DESCRIPTION
Getty is usually invoked by init(8) to open and initialize the tty line, read a login name, and invoke login(1). getty attempts to adapt the system to the speed and type of terminal being used. The argument tty is the special device file in /dev to open for the terminal (e.g., ``ttyh0''). If there is no argument or the argument is ``-'', the tty line is assumed to be open as file descriptor 0. The type argument can be used to make getty treat the terminal line specially. This argument is used as an index into the gettytab(5) database, to determine the characteristics of the line. If there is no argument, or there is no such table, the default table is used. If there is no /etc/gettytab a set of system defaults is used. If indicated by the table located, getty will clear the terminal screen, print a banner heading, and prompt for a login name. Usually either the banner of the login prompt will include the system hostname. 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 usually then changed and the `login:' is typed again; a second `break' changes the speed again and the `login:' is typed once more. Successive `break' characters cycle through the same standard set of speeds. 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 tty(4)). 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. Finally, login is called with the user's name as an argument. Most of the default actions of getty can be circumvented, or modified, by a suitable gettytab table. Getty can be set to timeout after some interval, which will cause dial up lines to hang up if the login name is not entered reasonably quickly. DIAGNOSTICS
ttyxx: No such device or address. ttyxx: No such file or address. A terminal which is turned on in the ttys file cannot be opened, likely because the requisite lines are either not configured into the system, the associated device was not attached during boot-time system con- figuration, or the special file in /dev does not exist. FILES
/etc/gettytab SEE ALSO
gettytab(5), init(8), login(1), ioctl(2), tty(4), ttys(5) 4th Berkeley Distribution November 17, 1996 GETTY(8)

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

NAME
getty - Sets the terminal type, modes, speed, and line discipline SYNOPSIS
getty [-h] [-t time] line speed_label terminal line_discipline getty -c file FLAGS
Hold the carrier during the initialization phase;do not hang up. Set the time period to the specified number of seconds. Drop the line after that amount of time if nothing is typed. Check the specified gettydefs file. DESCRIPTION
The getty command sets and manages terminals by setting up speed, terminal flags, and the line discipline. If command flags are provided, getty adapts the system to those specifications. getty prints the login prompt, waits for the user to enter a username, and invokes the login command. getty uses the /etc/gettydefs file for terminal information. The line argument refers to the device name in /dev. The speed_label argu- ment is a pointer into the /etc/gettydefs file where the definitions for speed and other associated flags are located. The terminal argu- ment specifies the name of the terminal type. The line_discipline argument specifies the name of the line discipline. The second syntax for the getty command provides a check option. When getty is invoked with the -c option and filename argument, it checks the specified file in the same way it scans gettydefs for terminal information, then prints the results to standard output. By default, the getty daemon writes the login string specified in the message field of the /etc/gettydefs file to any terminal spawned or respawned from the /etc/inittab file. If an /etc/issue file present, getty reads the file and writes its contents to the terminal prior to writing the login string specified in the /etc/gettydefs file. FILES
Specifies the command path. Specifies the terminal line database file. Specifies the path name for the issue identification file RELATED INFORMATION
Commands: init(8), login(1), stty(1) Files: issue(4). delim off getty(8)
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