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Full Discussion: wall
Top Forums UNIX for Dummies Questions & Answers wall Post 14476 by LivinFree on Friday 1st of February 2002 01:00:04 AM
Old 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" >>$each
echo "I am currently rebuilding the database" >>$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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LEARN ABOUT OPENSOLARIS

ul

ul(1)								   User Commands							     ul(1)

NAME

       ul - do underlining

SYNOPSIS

       ul [-i] [-t terminal] [filename]...

DESCRIPTION

       ul  reads  the  named  filenames  (or the standard input if none are given) and translates occurrences of underscores to the sequence which
       indicates underlining for the terminal in use, as specified by the environment variable	TERM. ul uses the /usr/share/lib/terminfo entry to
       determine  the  appropriate  sequences for underlining. If the terminal is incapable of underlining, but is capable of a standout mode then
       that is used instead. If the terminal can overstrike, or handles underlining automatically, ul degenerates to cat(1). If the terminal  can-
       not underline, underlining is ignored.

OPTIONS

       -t terminal    Override	the  terminal  kind specified in the environment. If the terminal cannot underline, underlining is ignored. If the
		      terminal name is not found, no underlining is attempted.

       -i	      Indicate underlining by a separate line containing appropriate dashes `-'; this is useful when  you  want  to  look  at  the
		      underlining which is present in an nroff(1) output stream on a CRT-terminal.

RETURN VALUES

       ul returns exit code 1 if the file specified is not found.

FILES

       /usr/share/lib/terminfo/*

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWdoc			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cat(1), man(1), nroff(1), attributes(5)

BUGS

       nroff  usually  generates a series of backspaces and underlines intermixed with the text to indicate underlining. ul makes attempt to opti-
       mize the backward motion.

SunOS 5.11							    17 Mar 1994 							     ul(1)
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