wall

djatwork · #1 (**permalink**) 01-31-2002

is there a command to send all terminals a message. i tired wall, but it only sends the message to who ever is logged in at a terminal. i need a command to send to every terminal no matter if someone is logged in or not.

Thanks!

-The DJ

sshokunbi · #2 (**permalink**) 01-31-2002

I don't know if you could send wall messages to 'dead' terminals. But I know you could use 'mail' to send messages to all users, either logged on or not.

Sola

djatwork · #3 (**permalink**) 01-31-2002

'mail' just sends an email to everyone, right? maybe i explaned it a little weird:

what i am trying to do is send every dummy terminal a message when i want them to log off the system. when a user is logged in, they recieve the message, but if no one is logged in at that terminal ,nothing is displayed on the screen.

hope this helps explain it a little better

-djatwork

sshokunbi · #4 (**permalink**) 01-31-2002

(I guessed as much that that is what you want). You may not worry about terminals that are not logged on since you want them logged off.

However, if you could write a small 'cron' message that would be executing the time you want users logged off, it may solve a bit, but a terminal has to logg on to receive the message allthesame.

Sola

djatwork · #5 (**permalink**) 01-31-2002

thats what i was afraid of. see what the whole point of this is, is that i wanted to write a message to users to stay logged off the system until a predetermined time. so, lets say i am rebuilding a index for a database and i want everyone to stay off the system until 10:00, the message would be on the screen. but, when i use 'wall' it does not show up, just the login screen.

-djatwork

wizard · #6 (**permalink**) 01-31-2002

You could always write a script to echo to the tty devices. The device names depend on the OS you're running, but they should be something like /dev/ttya, /dev/ttyb, etc.

i.e.

echo "Please logoff the system until 5pm." > /dev/ttya

LivinFree · #7 (**permalink**) 02-01-2002

I would do it the way wizard suggests...
First, I would make a list of all terminal devices, then read from that list and echo a message:

Code:

 # cat term-list
/dev/tty2
/dev/tty3
/dev/tty4
 #
 # cat send_message.sh
#!/usr/bin/sh
for each in `cat term-list`
do
echo "\n\n\n\n\tPlease log out until 10:00 PM" &gt;&gt;$each
echo "I am currently rebuilding the database" &gt;&gt;$each
done
 #

You might want to leave your terminal out of the list, do you're screen doesn't get interrupted, and maybe also send out a wall message to everyone logged in first, so their terminal doesn't get screwed up right before they have to log out.

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