Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!rice!sun-spots-request
From: jms@tardis.tymnet.com (Joe Smith)
Newsgroups: comp.sys.sun
Subject: Re: Calendar
Keywords: Software
Message-ID: <9832@brazos.Rice.edu>
Date: 11 Jul 90 02:01:40 GMT
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Organization: Sun-Spots
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X-Sun-Spots-Digest: Volume 9, Issue 254, message 16

In article <9574@brazos.Rice.edu> rzh@icf.llnl.gov (R. Hanscom) writes:

>about 7 or 8 seconds apart.  What determines if a machine sends out
>calendar mail (other than the fact that the user has a file called
>calendar with an entry for that day's date)??  How does calendar identify
>users -- from passwd, or aliases, or what??  Will a user get mail from
>every machine on the net that mounts his/her home directory, and runs
>calendar??

There are two calendar programs.  /usr/bin/calendar is the top level
script, you can type it out to see how it works.  If given an argument
(such as a single hyphen), /usr/bin/calendar does everyone's calendar
file.

/usr/lib/calendar is an executable binary.  If invoked with no arguments,
it creates a file for egrep to use to match lines with today's date.  If
invoked with the name of a file, it returns true of the file is NOT on an
NFS mounted system.  The idea is so that if the home directories are cross
mounted on several file servers, mail to a specific user will only come
from the local file server.

The version of /usr/bin/calendar for SunOS-4.1 optimizes the search for
local home directories by adding a grep command to the ypcat command:
    caldata="/bin/ypcat passwd.byname | grep /home/`hostname`"
That plus the "sort -u -" eliminated duplicate mailing on our system.

Joe Smith (408)922-6220 | SMTP: jms@tardis.tymnet.com or jms@gemini.tymnet.com
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