Forwarded Conversation Subject: plugins with rsh ------------------------ From: dave stern - e-mail.pluribus.unum <<a href="mailto:dit.dash@gmail.com">dit.dash@gmail.com</a>> <div>To: <a href="mailto:nagios-users@lists.sourceforge.net">nagios-users@lists.sourceforge.net</a></div> <div>Date: Wed, Jan 3, 2007 at 3:17 PM</div> <div><table border="0" cellpadding="12" cellspacing="0" width="100%"><tbody><tr><td>We have a legacy setup with tru64 hosts that are currently configured for rsh, not ssh. I've installed the latest and greatest nagios on a relatively recent fedora host and have used plugins with ssh in the past. The problem is that rsh doesn't return status codes properly. Rather, it returns only the status code of rsh itself, not the command. A search implies you just need to echo $? with rsh. rsh linux to linux, I get this: linux1> rsh linux1 'date ; echo $?' Wed Jan 3 15:15:07 EST 2007 and trying to generate an error: linux1> rsh linux1 'bogus ; echo $?' bogus; Command not found. 1 So that looks ok but first problem is when I put into nagios commands define .... rsh $HOSTADDRESS$ 'mycommand; echo $?' The web page show "(No output!) Is it possible it swallows the quotes? Further, rsh behaves differently on tru64: linux1> rsh tru64-host 'date;echo $?' Variable syntax. Any ideas for these problems? Thanks and </td></tr> </tbody></table></div> -------- From: Lacayo, Luis F <<a href="mailto:lflacayo@cps.k12.il.us">lflacayo@cps.k12.il.us</a>> <div>To: "dave stern - e-mail.pluribus.unum" <<a href="mailto:dit.dash@gmail.com">dit.dash@gmail.com</a>>, <a href="mailto:nagios-users@lists.sourceforge.net">nagios-users@lists.sourceforge.net</a></div> <div>Date: Wed, Jan 3, 2007 at 3:26 PM</div> <div><table border="0" cellpadding="12" cellspacing="0" width="100%"><tbody><tr><td> <div link="blue" vlink="purple" lang="EN-US"> <div> Try adding a second $ at the end of the command. rsh $HOSTADDRESS$ 'mycommand; echo $$?' <div> Luis Lacayo Sr. UNIX Admin Chicago Public Schools Office of Technology Services 125 S. Clark Street – Suite 300 Chicago, IL 60603 Direct:773-553-3835 Office: 773-553-1300 FAX:773-553-1363 <a href="mailto:lflacayo@cps.k12.il.us" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">lflacayo@cps.k12.il.us </a> </div> <div> <div style="text-align: center;" align="center"> <hr align="center" size="2" width="100%"> </div> From: <a href="mailto:nagios-users-bounces@lists.sourceforge.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">nagios-users-bounces@lists.sourceforge.net</a> [mailto:<a href="mailto:nagios-users-bounces@lists.sourceforge.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">nagios-users-bounces@lists.sourceforge.net</a>] On Behalf Of dave stern - e-mail.pluribus.unum Sent: Wednesday, January 03, 2007 2:17 PM To: <a href="mailto:nagios-users@lists.sourceforge.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">nagios-users@lists.sourceforge.net</a> Subject: [Nagios-users] plugins with rsh </div><div style="padding: 5px 0pt;">[Quoted text hidden]</div></div> </div> </td></tr> </tbody></table></div> -------- From: Darren Dunham <<a href="mailto:ddunham@taos.com">ddunham@taos.com</a>> <div> To: "dave stern - e-mail.pluribus.unum" <<a href="mailto:dit.dash@gmail.com">dit.dash@gmail.com</a>></div><div>Date: Wed, Jan 3, 2007 at 4:17 PM</div> <div><table border="0" cellpadding="12" cellspacing="0" width="100%"> <tbody><tr><td>> Further, rsh behaves differently on tru64: > > linux1> rsh tru64-host 'date;echo $?' > Variable syntax. $? is a bourne-style parameter for status. Older csh-style shells may not support it (although looking around, I was surprised to find a few /bin/csh shells that did). Specifically, "Variable syntax" appears to be a csh error message to me. Is the account you're accessing on the tru64 machine using a csh shell? -- Darren Dunham <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:ddunham@taos.com">ddunham@taos.com</a> Senior Technical Consultant TAOS <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.taos.com/" target="_blank">http://www.taos.com/</a> Got some Dr Pepper? San Francisco, CA bay area < This line left intentionally blank to confuse you. > </td></tr> </tbody></table></div> -------- These were both great suggestions. Here's where I stand now (hopefully this can help others altho this isn't yet resolved) nagios user has a csh. I can either change that or get around it by prepending to the nagios command /usr/bin/sh Also, rsh interprets two dollars as PID eg if I Linux1> rsh hostname 'date; echo $$?' Thu Jan 4 12:38:36 EST 2007 12344 Turns out, it will interpret $status correctly ie Linux1> rsh hostname 'date; echo $status' Thu Jan 4 12:38:36 EST 2007 0 >linux1> rsh hostname 'bogus; echo $status' bogus; Command not found 1 (Hope I got that right, manufacturing this from memory as nagios network is airgapped to internet) The problem is still getting the info back to nagios. Putting the above command into nagios's command.cfg and setting up two such services, one on a host that will report success and one on a host that will fail, I get both hosts reporting "(No output!) in the far right nagios column. If I remove everything after the semicolon, the command runs and the output is correct but the status code isn't returned thus the service color isn't updated. Changing "echo $status" to "echo $$status" also makes no difference so nagios appears to be choking on the two commands (ie when it hits the ";")