Forum: Cfengine Help
Subject: Weird unset variable warning?
Author: sauer
Link to topic: https://cfengine.com/forum/read.php?3,21129,21129#msg-21129
I'm seeing this error regularly, and while everything actually works fine, the
error is bugging me.
!! Unresolved variables in rval of "find_arg" in scope app_webmin
Here's a bundle which leads to the error:
# cat /tmp/test.cf
body common control {
bundlesequence => { "example" };
}
bundle agent example {
vars:
linux::
"find_path" string => "/usr/bin/find";
"fn_arg" string => "-iname";
!linux::
"find_path" string => "/bin/find";
"fn_arg" string => "-name";
any::
"server_root" string => "/tmp";
"extensions" slist => { "*.pl", "*.cgi", "*.cf" };
# if we have more than one extension, join those with "-o -name" then
# put a -name in front of the list, which should still work with just 1
"fn_ext_arg" string => join( " -o $(fn_arg) ", "extensions" );
"find_arg" string => "$(server_root) $(fn_arg) $(fn_ext_arg)";
"executable_list" slist => { @(find2array.executable_list) };
commands:
"/var/cfengine/modules/find2array executable_list $(find_arg)"
comment => "Build array of executables",
handle => "build_exec_list",
module => "true";
reports:
linux|!linux::
"Found $(executable_list)";
}
And here's what I get when I run it:
# cf-agent -IK -f /tmp/test.cf
!! Unresolved variables in rval of "find_arg" in scope example
-> Executing '/var/cfengine/modules/find2array executable_list /tmp -iname
*.pl -o -iname *.cgi -o -iname *.cf' ...(timeout=-678,owner=-1,group=-1)
M "/var/cfengine/modules/find2array executable_list /tmp -iname *.pl -o -iname
*.cgi -o -iname *.cf":
-> Completed execution of /var/cfengine/modules/find2array executable_list
/tmp -iname *.pl -o -iname *.cgi -o -iname *.cf
R: Found /tmp/sendmail.cf
R: Found /tmp/test.cf
I think that it's complaining about the fn_ext_arg variable since it's the
result of a join, but I can't see why that would cause a problem. I tried
replacing any with the hostname, and doing a hostname& in front of the
linux/!linux, but that had no impact. Replacing the join with a fixed string,
though, makes the warning go away.
Can someone with more knowledge of "how cfengine resolves variables" maybe clue
me in as to what's happening here? I really dont like seeing warnings,
particularly when everything's actually ok.
Also, if there's a way to make the module protocol accept longer strings (so I
can return larger arrays), I'd appreciate hearing about it. :)
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