dfs@doe.carleton.ca (David F. Skoll) (11/08/90)
For those who've been following the REMIND saga...
The following C-Shell script can be run by cron in the wee hours of the
morning to mail reminders to users who create a .reminders file in their
home directory. The script should be run sometime after midnight so that
the date is correct when users arrive in the morning.
David Skoll.
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#!/bin/csh -f
# Shell script to mail all users reminders.
# Run it AFTER MIDNIGHT so that date is correct!
# On our system, we have the following in our crontab:
# 05 5 * * * /usr/share/lib/remind/remind-all > /dev/null 2>&1
# Also, you MUST use the -r option on REMIND, otherwise SEVERE
# security hole could develop. I recommend making this script
# readable and executable only by root to minimize security problems.
# DO NOT make the script setuid!
# The following line gets a list of users for systems using SUN's
# NIS service:
set USERS = `ypcat passwd | awk -F: '{print $1}'`
# The following line gets a list of users by examining /etc/passwd:
# set USERS = `awk -F: '{print $1}' /etc/passwd`
# If neither of the above methods works, you must come up with some
# way of getting a list of users on the system
# Set the following variables as appropriate for your system
set REMIND = /usr/local/bin/remind
set MAIL = /usr/ucb/mail
set CMP = /usr/bin/cmp
set RM = "/usr/bin/rm -f"
set EMPTY = /tmp/Empty.$$
set FULL = /tmp/Full.$$
# Create the dummy empty reminder file
$REMIND -r /dev/null > $EMPTY
# Scan each user's directory for a .reminders file
foreach i ($USERS)
if (-r ~$i/.reminders) then
# echo "$i has a .reminders file." DEBUGGING PURPOSES ONLY
$REMIND -r ~$i/.reminders > $FULL
$CMP -s $EMPTY $FULL
if ($status != 0) then
# echo "Sending mail to $i" DEBUGGING PURPOSES ONLY
$MAIL -s "Reminders" $i < $FULL
endif
$RM $FULL
endif
end
$RM $EMPTY