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  14    <H1>AW: AW: [IRCServices] Backup Feature?</H1>
  15     <B>Ian R. Justman</B>
  16     <A HREF="mailto:ircservices%40ircservices.za.net?Subject=AW%3A%20AW%3A%20%5BIRCServices%5D%20Backup%20Feature%3F&In-Reply-To=003201c084ae%24bd564f20%240200000a%40strider"
  17        TITLE="AW: AW: [IRCServices] Backup Feature?">ianj at esper.net
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  19     <I>Thu Jan 25 00:30:31 PST 2001</I>
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  34 <PRE>On Mon, 22 Jan 2001, Strider wrote:
  35
  36 &gt;<i> I think the cron job idea is the best I've seen out of all of this. It uses
  37 </I>&gt;<i> the least amount of resources, has less overhead, and no database issues. A
  38 </I>&gt;<i> cron job that runs every 5 minutes would work great for that. All you would
  39 </I>&gt;<i> have to do is write a script that checks to see if services is running, and
  40 </I>&gt;<i> if it finds it isn't, start them up.
  41 </I>
  42 This is what I have running on the EsperNet :
  43
  44 ========== 8&lt; ============ Snipperoonie ==============
  45
  46 #!/usr/bin/perl
  47
  48 $pidfile = &quot;$ENV{HOME}/lib/services.pid&quot;;
  49 $services = &quot;$ENV{HOME}/bin/services&quot;;
  50
  51 if ( ! -e &quot;$pidfile&quot; ) {
  52     system(&quot;$services&quot;);
  53     exit;
  54 } else {
  55     $pid = `cat $pidfile`;
  56     chomp $pid;
  57     if ( ! -e &quot;/proc/$pid&quot; ) {
  58         system(&quot;rm $pidfile&quot;);
  59         system(&quot;$services&quot;);
  60         exit;
  61     }
  62     # If we got this far, assume that Services are running correctly,
  63     # then exit.
  64 }
  65
  66 ========== 8&lt; ============ Snipperoonie ==============
  67
  68 Then season to taste.
  69
  70 On EsperNet, Services runs under its own UID and out of its own home
  71 directory.  As-is (except for the values of $pidfile and $services, which
  72 are site-specific, especially if you are not running this out of a &quot;home
  73 directory&quot;), this should work just fine under Linux, FreeBSD, and perhaps
  74 OpenBSD.  NetBSD uses /kern, if memory serves.  Otherwise, as always,
  75 YMMV.
  76
  77 Hell, you could even run this every minute if you so chose since all it
  78 really does is check for the presence of one &quot;file&quot; named with the
  79 contents of another (assuming THAT file exists, then restarting Services
  80 if not or if the one in /proc does not exist).
  81
  82 The only real sacrifice you might make here is the memory footprint of the
  83 Perl interpreter when it starts.  I just found it annoyingly easy (and
  84 enjoyable) to implement in Perl. :)
  85
  86 &gt;<i> One feature I'd like to see though that the cron job idea could benefit from
  87 </I>&gt;<i> is being able to send the process arguments and it work to where you can
  88 </I>&gt;<i> send a global from outside of the ircd. I could see this being useful for
  89 </I>&gt;<i> the script to send a global to all users with a warning to identify to
  90 </I>&gt;<i> nickserv and an apology about services being down. I could see other
  91 </I>&gt;<i> benefits from this as well later on down the line in conjuction with logs
  92 </I>&gt;<i> and tail -f if one didn't care to log into irc.
  93 </I>
  94 You could probably hack in @ARGV support or put in a file that the script
  95 would then &quot;include&quot; or &quot;require&quot; into the code, passing those values to
  96 Services when you fire up.  Or whichever method you'd prefer.
  97
  98 Perl rocks my world, what more can I say? :)
  99
 100 --Ian R. Justman, Co-Founder and Postmaster, The EsperNet IRC Network.
 101
 102 -----
 103 Ian R. Justman (NIC handle IJ12)  <A HREF="http://www.ircservices.za.net/mailman/listinfo/ircservices">ianj at esper.net</A> (Official EsperNet business)
 104 Co-Founder and Postmaster, The EsperNet IRC Network
 105 Server Administrator, chocobo.esper.net &quot;IJ&quot; on IRC
 106
 107 PGP key available upon request, or finger <A HREF="http://www.ircservices.za.net/mailman/listinfo/ircservices">ianj at esper.net.</A>
 108
 109 If this message was signed with the Postmaster's key, please finger
 110 <A HREF="http://www.ircservices.za.net/mailman/listinfo/ircservices">postmaster at esper.net</A> for the Postmaster public key.
 111
 112 Type Bits/KeyID    Date       User ID
 113 pub  1024/BAB34B69 1997/11/15 EsperNet Postmaster &lt;<A HREF="http://www.ircservices.za.net/mailman/listinfo/ircservices">postmaster at esper.net</A>&gt;
 114             Key fingerprint = 05 BD 7C B5 8E 0B FD EF  EE 47 49 C4 96 11 59 75
 115
 116
 117
 118 </PRE>
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