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lat_manual_setup(7) Miscellaneous Information Manual lat_manual_setup(7) NAME lat_manual_setup - Describes how to manually set up the Local Area Transport (LAT) DESCRIPTION To run LAT on your system, you must configure LAT in your system's ker- nel (see the Network Administration manual). Optionally, you can customize your LAT setup. The customization sec- tion of the Network Administration manual includes information on gen- eral customization, setting up printers, host-initiated connections, the LAT/Telnet gateway, and creating your own service. For more infor- mation on customizing LAT, see the Network Administration manual. Setting Up LAT To set up LAT on your system manually, you must first configure your kernel for LAT (see the Network Administration manual). Then log in as superuser and perform the following steps: Create the LAT device spe- cial files. LAT supports SVR4-style and BSD-style devices. Digital recom- mends the use of SVR4-style devices. See the Network Adminis- tration manual for more information. Digital recommends you use the latsetup utility to create SVR4-style devices to insure du- plicate minor numbers are not used. You can use the mknod com- mand to create character devices with a major number of 5. If you create SVR4 devices manually, you should observe the follow- ing rules: Start the SVR4 device numbers at /dev/lat/620. This avoids overlapping minor numbers from the BSD tty name space. Make the minor number of the SVR4 device the same as the name. For example, device /dev/lat/833 should have minor number 833. The following command would create the SVR4-style LAT device /dev/lat/833: # /usr/sbin/mknod /dev/lat/833 c 5 833 Once you have created the SVR4-style device, check the permissions of the device to make sure they are what you desire. You can create BSD-style devices by running the /dev/MAKEDEV script with the LAT option. The syntax for the MAKEDEV command with the LAT option is as follows: MAKEDEV latN The N variable can be 0 to 38. The /dev/MAKEDEV script creates one BSD-style LAT device special file for each LAT terminal device. When you run the MAKEDEV script, it creates 16 BSD-style LAT device special files, and creates the LAT control device (/dev/streams/lat), if it has not already been created. The MAKEDEV script requires 16 contiguous LAT device special files to be available. (Specifying lat38 re- quires only 12 contiguous LAT device special files to be avail- able.) For example, the following commands create a total of 32 BSD- style LAT device special files: # cd /dev # MAKEDEV lat0 # MAKEDEV lat1 Record the device special file information displayed by the MAKEDEV script. The special file names vary depending on the number of terminal devices already configured. The following is sample output from the MAKEDEV command: MAKEDEV: special file(s) for lat1: tty16 tty17 tty18 tty19 tty1a tty1b tty1c tty1d tty1e tty1f tty1g tty1h tty1i tty1j tty1k tty1l Edit the /etc/inittab file to include entries for the LAT device special files you created. For example: lat620:34:respawn:/usr/sbin/getty /dev/lat/620 console vt100 lat621:34:respawn:/usr/sbin/getty lat/621 console vt100 lat630:34:respawn:/usr/sbin/lattelnet lat/630 lattelnet The sec- ond field (34) specifies the run levels at which the LAT devices are spawned; in this example, the getty process is spawned at either run level 3 or 4. The first entry uses an absolute path- name for the device (/dev/lat/620). The second uses a relative pathname (lat/621). The previous example shows how to add entries to the /etc/init- tab file for SVR4 LAT devices. The following example shows en- tries for BSD LAT devices: lat16:34:respawn:/usr/sbin/getty tty16 console vt100 lat17:34:respawn:/usr/sbin/getty tty17 con- sole vt100 lat18:34:respawn:/usr/sbin/lattelnet tty18 lattel- net18 For more information, see the inittab(4) and getty(8) ref- erence pages. The Network Administration manual provides addi- tional information on SVR4 and BSD devices. Use the following command to spawn the processes for the LAT device special files that you added to the /etc/inittab file: # /sbin/init q Create the STREAMS special file required by LAT by issuing the follow- ing command: # /usr/sbin/strsetup -i Enable LAT automatic startup and shutdown by using the following command: # /usr/sbin/rcmgr set LAT_SETUP 1 When LAT automatic startup and shutdown is enabled, the /sbin/init.d/lat file automatically starts LAT upon reaching run level 3 and automatically stops LAT when exiting run level 3. Start LAT by issuing the following command: # /usr/sbin/latcp -s RELATED INFORMATION Commands: llogin(1), netstat(1), getty(8), init(8), latcp(8), lat- setup(8), MAKEDEV(8), mknod(8), rcmgr(8), strsetup(8). Files: inittab(4). Introduction: lat_intro(7). Network Administration , System Administration delim off lat_manual_setup(7)