[Xymon] Segmentation Fault (core dumped) with xymond_alert

[John Thurston]

I bumped into this again today. I was working up some new alert 
conditions and tested them with:

> xymondmd xymond_alert --config=foo.cfg --test foo.bar.com msgs --color=red

It works as expected if foo.bar.com is defined, but if that host _isn't_ 
defined in the hosts.cfg, xymond_alert core dumps.

For 4/3/17 on Solaris, the stack of the dump looks like:
>  fee12d10 strlen   (37c93, ffbf50b4, 96164, 0, 0, 0) + 50
>  fee81924 vfprintf (50190, 37c68, ffbf50a8, 0, a0ba4, fee81424) + ec
>  0001a554 traceprintf (37c68, af7e8, 96160, 0, 50190, 4b800) + 84
>  0001c2fc criteriamatch (7, 55030, 0, 0, 0, 4bc00) + e4
>  0001e8b4 next_recipient (aff30, ffbf51a8, 0, 0, 4bc24, 4bc28) + 90
>  00017054 send_alert (aff30, 501b0, 0, ffbf51a8, 4bc00, ffff7fe4) + 17c
>  00034550 main     (0, 0, 0, 0, 501b0, aff30) + 1368
>  00014940 _start   (0, 0, 0, 0, 0, 0) + 5c

Granted that in production xymond_alert will probably not be fed an 
undefined host, but it would be nicer if it handled the condition a 
little more elegantly.

-- 
    Do things because you should, not just because you can.

John Thurston    907-465-8591
John.Thurston at alaska.gov
Enterprise Technology Services
Department of Administration
State of Alaska