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Full Discussion: Reminder script not working...
Homework and Emergencies Homework & Coursework Questions Reminder script not working... Post 302569598 by agama on Tuesday 1st of November 2011 12:40:26 AM
Old 11-01-2011
Quote:
Originally Posted by csharp100
Sure, the for loop but I could not get it to work either. i.e.
Good -- you were there!!
Quote:

Code:
echo "\nEnter time: "
read TIME
echo "\nEnter message: "
read MESSAGE
echo "\nEnter user(s): "
read LOGNAMES
at -k $TIME << EOF
for NAME in $LOGNAMES
     do
     echo $MESSAGE | write $NAME$
     DONE
EOF

NAME needs to be a variable in the script and not expanded when the script is written to at. So, if you escape it /$NAME that will put it literally in the script ($NAME) and not what name contains (which is nothing). Drop the last dollar sign.

The only other problem I see is that DONE should be lower case. That might just be a cut/paste issue; hard to say from this end.

With those changes it should send you mail with the list of names (I'd use echo to avoid errors if the list is empty).

Have a go with those changes -- you're a lot closer than you think!
This User Gave Thanks to agama For This Post:
csharp100
 

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LEARN ABOUT LINUX

shutdown

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

NAME

       shutdown - bring the system down

SYNOPSIS

       shutdown [OPTION]...  TIME [MESSAGE]

DESCRIPTION

       shutdown  arranges  for	the  system to be brought down in a safe way.  All logged-in users are notified that the system is going down and,
       within the last five minutes of TIME, new logins are prevented.

       TIME may have different formats, the most common is simply the word 'now' which will bring the system down immediately.	Other  valid  for-
       mats are +m, where m is the number of minutes to wait until shutting down and hh:mm which specifies the time on the 24hr clock.

       Once TIME has elapsed, shutdown sends a request to the init(8) daemon to bring the system down into the appropriate runlevel.

       This  is  performed  by emitting the runlevel(7) event, which includes the new runlevel in the RUNLEVEL environment variable as well as the
       previous runlevel (obtained from the environment or from /var/run/utmp) in the PREVLEVEL variable.  An additional INIT_HALT variable may be
       set, this will contain the value HALT when bringing the system down for halt and POWEROFF when bringing the system down for power off.

OPTIONS

       -r     Requests that the system be rebooted after it has been brought down.

       -h     Requests	that the system be either halted or powered off after it has been brought down, with the choice as to which left up to the
	      system.

       -H     Requests that the system be halted after it has been brought down.

       -P     Requests that the system be powered off after it has been brought down.

       -c     Cancels a running shutdown.  TIME is not specified with this option, the first argument is MESSAGE.

       -k     Only send out the warning messages and disable logins, do not actually bring the system down.

ENVIRONMENT

       RUNLEVEL
	      shutdown will read the current runlevel from this environment variable if set in preference to reading from /var/run/utmp

FILES

       /var/run/utmp
	      Where the current runlevel will be read from; this file will also be updated with the new runlevel.

       /var/log/wtmp
	      A new runlevel record will be appended to this file for the new runlevel.

NOTES

       The Upstart init(8) daemon does not keep track of runlevels itself, instead they are implemented entirely by its userspace tools.

       See runlevel(7) for more details.

AUTHOR

       Written by Scott James Remnant <scott@netsplit.com>

REPORTING BUGS

       Report bugs at <https://launchpad.net/upstart/+bugs>

COPYRIGHT

       Copyright (C) 2009 Canonical Ltd.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       runlevel(7) init(8) telinit(8) reboot(8)

Upstart 							    2009-07-09							       shutdown(8)
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