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HP-UX Reference > C


HP-UX 11i Version 3: February 2007

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ct — spawn getty to a remote terminal (call terminal)


ct [-w n] [-x n] [-h] [-v] [-s speed] telno...


ct dials telno, the telephone number of a modem that is attached to a terminal, and spawns a getty(1M) process to that terminal.

ct tries each line listed in file /etc/uucp/Devices until it finds an available line with appropriate attributes or runs out of entries. If no lines are free, ct asks whether it should wait for a line, and if so, how many minutes it should wait before giving up. ct searches again for an available line at one-minute intervals until the specified limit is exceeded. Note that normally, ct disconnects the current tty line, so that the line can answer the incoming call. This is because ct assumes that the current tty line is connected to the terminal to spawn the getty process.

The telno argument specifies the telephone number, which can be composed of characters 0 through 9, -, =, *, and #. Use equal signs to signify secondary dial tones and minus signs for delays at appropriate places. The maximum length of telno is 31 characters. If more than one telephone number is specified, ct tries each in succession until one answers; this is useful for specifying alternate dialing paths.

When ct disconnects the current line, getty should not be spawned on this line if ct is going to make use of the same line to reconnect. To do this, set the entry for this line in the inittab file to uugetty instead of getty (see inittab(4)).


ct recognizes the following options and command-line arguments:


Instruct ct to wait for a line a maximum of n number of minutes, if lines are busy. If this option is specified, ct does not query the user about whether to wait for a line.


Produce detailed output from program execution on the standard error output. This option is used for debugging. The debugging level n is a single digit; the most useful value is -x9.


Prevent ct from disconnecting ("hanging up") the current tty line. This option is necessary if the user is using a different tty line than the one used by ct to spawn the getty.


Verbose mode. The -v option is used with the -h option and causes ct to send a running narrative to the standard error output stream.


Set the data rate where speed is expressed in baud. The default rate is 1200.

After the user on the destination terminal logs out, ct prompts, Reconnect? If the response begins with the letter n the line is dropped. Otherwise, getty is restarted and the login: prompt is printed.

Of course, the destination terminal must be attached to a modem that can automatically answer incoming calls.


/var/adm/ctlog /etc/uucp/Devices

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