I want to do the following (unimportant details omitted) and so far I'm
stumped:
bundle agent test {
vars:
"output" string => execresult("somecommand", "noshell");
"netgroups" slist => splitstring("$(output)", "\s+", 20);
files:
"/etc/passwd"
edit_line => enforce_netgroups("@(this.netgroups)");
}
bundle edit_line enforce_netgroups(netgroups) {
delete_lines:
"\...@.*";
insert_lines:
"+...@$(netgroups):x:::::";
}
The problem is when "somecommand" returns a blank line, so $(output)
contains a single newline. Thus I end up with the single netgroup line
+@:x:::::
in my passwd file. It can be legitimate for the command to return a
blank line, meaning there are no allowed netgroups for a given host
(maybe it's not an ldap client; I will have a separate ldap_client class
later, but that's kinda beside the point for this exercise).
I've also tried using regline() in lots of ways to determine if the line
is blank, but I wasn't getting that to work. Having a Perl-like chomp()
feature might help. :)
So how do I detect it's a "blank" line, despite the newline, so that I
can prevent any lines from being inserted into the passwd file? Note
that I *do* want the files promise to occur since there may be invalid
netgroups for it to delete.
Thanks,
Justin
--
Justin C. Lloyd
Unix Infrastructure Engineer
DigitalGlobe, An Imaging and Information Company
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