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Nagios 1.2: Could not open pipe for process check command

…inheriting another nagios configuration, I am getting the following error in the UI when choosing Process Info:

Process Status:
UNKNOWN
Check Command Output: Could not open pipe for process check command

the relevant entry in cgi.cfg is:
nagios_check_command=/usr/local/nagios/plugins/libexec/check_nagios -F /usr/local/nagios/var/status.log -e 5 -C “./bin/nagios”

executing this manually works fine as nagios user:

Nagios ok: located 1 process, status log updated 4 seconds ago
echo $?
0

nagios is running as:
nagios 23321 1 0 13:46:46 ? 0:00 ./bin/nagios ./etc/nagios.cfg

apache is running as:
root 22642 1 0 13:16:36 ? 0:00 /usr/local/nagios/apache/bin/httpd -k start
nobody 22650 22642 0 13:16:52 ? 0:00 /usr/local/nagios/apache/bin/httpd -k start
nobody 22646 22642 0 13:16:36 ? 0:00 /usr/local/nagios/apache/bin/httpd -k start
nobody 22645 22642 0 13:16:36 ? 0:00 /usr/local/nagios/apache/bin/httpd -k start
nobody 22647 22642 0 13:16:36 ? 0:00 /usr/local/nagios/apache/bin/httpd -k start
nobody 22643 22642 0 13:16:36 ? 0:00 /usr/local/nagios/apache/bin/httpd -k start
nobody 22644 22642 0 13:16:36 ? 0:00 /usr/local/nagios/apache/bin/httpd -k start

/etc/group entry:
nagiocmd::4001:nagios,nobody,root

directory/file permissions:
drwxrwxr-x 20 nagios nagios 1536 Apr 17 13:57 nagios
drwxr-xr-x 15 nagios nagios 512 Mar 8 14:55 apache

drwxr-xr-x 5 nagios nagios 512 Apr 12 17:09 plugins
drwxr-xr-x 2 nagios nagios 1536 Apr 17 13:55 libexec
-rwxr-xr-x 1 nagios nagios 483416 Apr 12 17:09 check_nagios

drwxrwxr-x 4 nagios nagiocmd 512 Apr 17 14:20 var
drwxrwsr-x 2 nagios nagiocmd 512 Apr 17 13:46 rw
prw-rw---- 1 nagios nagiocmd 0 Apr 17 13:46 nagios.cmd

…anything else I can check?

It looks like for some reason spopen in cgiutils.c is not working right as it must be returning a NULL for STATE_UNKNOWN to be set (see line 1243 in ./nagios-1.2/cgi/cgiutils.c)

This is on Solaris 9. Might this be a bug/incompatibility with nagios 1.2 and Solaris 9? Would upgrading to Nagios 2.2 solve this? Thanks for any suggestions.

…found one problem by debugging extinfo.cgi that double quotes (") are not allowed in the nagios_check_command or NULL (and consequently “could not open pipe” error) is returned. This goes for single quotes as well.

Now I get “Nagios check command did not return any output” so I’m in the process of debugging that as well.

…looks like execve(args[0],args,environ); is never being executed in popen.c

Installing and configuring nagios2.2 on Solaris 9 looks like it works ok, so I guess this question is academic.

The exec/spawn implementation of commands via extinfo.cgi in nagios2.2 looks like it has changed enough to get it to work on this platform (e.g. there is no longer a popen source).

Time to upgrade.